:root {
  --font-interface: "Helvetica Neue", "Segoe UI", Helvetica, Arial, sans-serif;
  --type-label: 12px;
  --type-meta: 12px;
  --type-ui: 14px;
  --type-body: 16px;
  --type-subtitle: 18px;
  --type-title: clamp(26px, 2.4vw, 36px);
  --type-section-display: clamp(34px, 3.4vw, 54px);
  --type-headline: clamp(40px, 4.5vw, 62px);
  --type-display: clamp(48px, 5.4vw, 72px);
  --type-display-mobile: clamp(34px, 11vw, 48px);
  --type-metric: clamp(32px, 3.2vw, 48px);
  --type-metric-large: clamp(40px, 3.6vw, 56px);
  --type-paper-heading: clamp(40px, 4.8vw, 62px);
  --type-reading: 16px;
  --leading-label: 1.35;
  --leading-body: 1.55;
  --leading-reading: 1.78;
  --action-start: var(--blue-deep);
  --action-end: var(--violet);
  --bg: #f7f7f8;
  --surface: #ffffff;
  --surface-soft: #f7f7f8;
  --surface-strong: #efeff2;
  --ink: #111217;
  --muted: #686a72;
  --muted-strong: #4f5159;
  --line: rgba(17, 18, 23, 0.12);
  --line-strong: rgba(17, 18, 23, 0.22);
  --blue: #565650;
  --blue-deep: #30312e;
  --violet: #8a867d;
  --cyan: #565650;
  --success: #14795b;
  --warning: #9a4f10;
  --danger: #b4233e;
  --on-accent: #ffffff;
  --on-action: #ffffff;
  --danger-solid: #a91e38;
  --on-danger: #ffffff;
  --accent-soft: color-mix(in srgb, var(--blue) 8%, var(--surface));
  --danger-soft: color-mix(in srgb, var(--danger) 9%, var(--surface));
  --overlay-scrim: rgba(10, 14, 28, 0.5);
  --cover-line: rgba(255, 255, 255, 0.38);
  --cover-glass: rgba(255, 255, 255, 0.12);
  --cover-glass-hover: rgba(255, 255, 255, 0.2);
  --on-cover: #ffffff;
  --cover-button-surface: rgba(255, 255, 255, 0.9);
  --cover-button-ink: #1b1b1a;
  --shadow: none;
  --shadow-small: none;
  --sidebar-width: 272px;
  --topbar-height: 64px;
  --page-gutter: clamp(24px, 3vw, 52px);
  --radius: 18px;
  --radius-small: 12px;
}

:root[data-theme="dark"] {
  --bg: #0d0e11;
  --surface: #141519;
  --surface-soft: #191a1f;
  --surface-strong: #222329;
  --ink: #f4f4f5;
  --muted: #8f919a;
  --muted-strong: #c2c3c9;
  --line: rgba(255, 255, 255, 0.11);
  --line-strong: rgba(255, 255, 255, 0.2);
  --blue: #d0ccc2;
  --blue-deep: #b6b1a7;
  --violet: #8e897f;
  --cyan: #d0ccc2;
  --success: #63d4ab;
  --warning: #f0ad68;
  --danger: #ff8aa3;
  --on-accent: #ffffff;
  --shadow: none;
  --shadow-small: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 0;
  scroll-behavior: smooth;
}

body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-interface);
  font-size: var(--type-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button {
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[contenteditable="true"]:focus-visible,
[contenteditable="plaintext-only"]:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

::selection {
  background: color-mix(in srgb, var(--violet) 26%, transparent);
}

.skip-link {
  position: fixed;
  z-index: var(--ap-z-skip);
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  border-radius: var(--ap-radius-xs);
  background: var(--ink);
  color: var(--surface);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.icon {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
}

.app-body {
  min-width: 0;
}

.sidebar {
  position: sticky;
  z-index: var(--ap-z-shell);
  top: 0;
  display: flex;
  height: 100vh;
  min-width: 0;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 92%, transparent), var(--surface)),
    var(--surface);
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--topbar-height);
  padding: 0 17px 0 20px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  min-width: 0;
  gap: 11px;
  align-items: center;
  text-align: left;
}

.brand > span:last-child {
  min-width: 0;
}

.brand strong,
.brand small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand strong {
  font-size: var(--ap-text-ui);
  font-weight: 650;
  letter-spacing: -0.018em;
}

.brand small {
  margin-top: 1px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.brand-mark {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--blue) 44%, var(--line));
  border-radius: 9px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--blue) 11%, var(--surface)), color-mix(in srgb, var(--violet) 12%, var(--surface)));
  color: var(--blue);
  box-shadow: inset 0 0 18px color-mix(in srgb, var(--violet) 9%, transparent);
}

.brand-mark .icon {
  width: 16px;
  height: 16px;
}

.icon-button {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted-strong);
  transition: 160ms ease;
}

.icon-button:hover {
  border-color: var(--line);
  background: var(--surface-strong);
  color: var(--ink);
}

.sidebar-close,
.menu-button {
  display: none;
}

.primary-nav {
  display: grid;
  gap: 3px;
  padding: 18px 12px 13px;
}

.nav-link {
  display: grid;
  grid-template-columns: 21px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 40px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted-strong);
  text-align: left;
  transition: color 150ms ease, background 150ms ease, border-color 150ms ease;
}

.nav-link:hover {
  background: var(--surface-soft);
  color: var(--ink);
}

.nav-link.active {
  border-color: color-mix(in srgb, var(--blue) 18%, var(--line));
  background: linear-gradient(90deg, color-mix(in srgb, var(--blue) 10%, var(--surface)), color-mix(in srgb, var(--violet) 5%, var(--surface)));
  color: var(--blue);
}

.nav-link > span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-link kbd,
.search-trigger kbd {
  border: 0;
  color: var(--muted);
  font-family: inherit;
  font-size: var(--type-meta);
}

.nav-link small {
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: var(--ap-radius-pill);
  color: var(--muted);
  font-size: var(--type-meta);
}

.nav-section {
  min-height: 0;
  padding: 12px;
}

.nav-section-head {
  display: flex;
  height: 38px;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  color: var(--muted);
  font-size: var(--type-meta);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-section-head .icon-button {
  width: 28px;
  height: 28px;
}

.nav-section-head .icon {
  width: 15px;
  height: 15px;
}

.space-list {
  display: grid;
  gap: 4px;
}

.space-tree {
  border-radius: 10px;
}

.space-tree > summary {
  list-style: none;
  cursor: pointer;
}

.space-tree > summary::-webkit-details-marker { display: none; }

.space-link {
  display: grid;
  grid-template-columns: 29px minmax(0, 1fr) 17px;
  gap: 10px;
  align-items: center;
  min-height: 47px;
  padding: 5px 8px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted-strong);
  text-align: left;
  transition: 160ms ease;
}

.space-link:hover,
.space-link.active {
  border-color: var(--line);
  background: var(--surface-soft);
  color: var(--ink);
}

.space-link.active {
  box-shadow: inset 2px 0 var(--blue);
}

.space-link-copy {
  display: -webkit-box;
  overflow: hidden;
  font-size: 12.5px;
  line-height: 1.25;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.space-link-copy strong,
.space-link-copy small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.space-link-copy small {
  margin-top: 2px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.space-chevron {
  display: grid;
  place-items: center;
  color: var(--muted);
  transition: transform 160ms ease;
}

.space-chevron .icon { width: 14px; }
.space-tree[open] .space-chevron { transform: rotate(90deg); }

.space-folder-list {
  display: grid;
  gap: 2px;
  margin: 2px 0 7px 38px;
  padding-left: 9px;
  border-left: 1px solid var(--line);
}

.space-folder-item { min-width: 0; }

.space-block-list {
  display: grid;
  gap: 1px;
  margin: 0 0 5px 20px;
  padding-left: 9px;
  border-left: 1px solid color-mix(in srgb, var(--violet) 35%, var(--line));
}

.space-block-link {
  display: flex;
  min-width: 0;
  gap: 6px;
  align-items: center;
  padding: 5px 4px;
  border-radius: 6px;
  color: var(--muted);
  font-size: var(--type-meta);
  text-align: left;
}

.space-block-link span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.space-block-link .icon { width: 11px; }
.space-block-link:hover,
.space-block-link.active { background: var(--surface-soft); color: var(--violet); }

.space-folder {
  display: flex;
  min-width: 0;
  gap: 7px;
  align-items: center;
  padding: 7px 6px;
  border-radius: 7px;
  color: var(--muted-strong);
  font-size: var(--type-meta);
  text-align: left;
}

.space-folder:hover,
.space-folder.active { background: var(--surface-soft); color: var(--blue); }
.space-folder span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-glyph { display: grid; color: var(--muted); }
.folder-glyph .icon { width: 13px; }

.space-monogram {
  --tone1: var(--blue);
  --tone2: var(--violet);
  display: grid;
  width: 29px;
  height: 29px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--tone1) 28%, var(--line));
  border-radius: var(--ap-radius-xs);
  background: linear-gradient(145deg, color-mix(in srgb, var(--tone1) 13%, var(--surface)), color-mix(in srgb, var(--tone2) 11%, var(--surface)));
  color: var(--tone1);
  font-size: var(--type-meta);
  font-weight: 750;
  letter-spacing: 0.03em;
}

.tone-cobalt,
.tone-violet,
.tone-indigo,
.tone-neutral {
  --tone1: var(--muted);
  --tone2: var(--line-strong);
}

.tools-nav {
  display: grid;
  gap: 3px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.nav-section-label {
  padding: 10px 8px 7px;
  color: var(--muted);
  font-size: var(--type-meta);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar-footer {
  display: grid;
  gap: 7px;
  margin-top: auto;
  padding: 12px;
  border-top: 1px solid var(--line);
}

.theme-row {
  display: flex;
  min-height: 42px;
  align-items: center;
  justify-content: space-between;
  padding: 0 9px;
  border-radius: 10px;
  color: var(--muted-strong);
}

.theme-row:hover {
  background: var(--surface-soft);
}

.theme-row > span:first-child {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: var(--ap-text-label);
}

.theme-row .icon {
  width: 17px;
}

.switch {
  display: block;
  width: 31px;
  height: 17px;
  padding: 2px;
  border: 1px solid var(--line-strong);
  border-radius: var(--ap-radius-pill);
  background: var(--surface-strong);
}

.switch i {
  display: block;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform 180ms ease, background 180ms ease;
}

.switch.active i {
  background: var(--violet);
  transform: translateX(14px);
}

.sidebar-scrim {
  display: none;
}

.topbar {
  position: sticky;
  z-index: 40;
  top: 0;
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto auto;
  min-height: var(--topbar-height);
  align-items: center;
  padding: 0 18px 0 var(--page-gutter);
  border-bottom: 1px solid var(--glass-line);
  background: var(--glass-surface);
  backdrop-filter: blur(16px) saturate(120%);
}

.history-controls {
  display: flex;
  gap: 2px;
}

.history-controls .icon-button {
  width: 30px;
  height: 30px;
  color: var(--muted);
}

.history-controls .icon-button:hover { color: var(--blue); background: var(--surface-soft); }

.breadcrumbs {
  display: flex;
  min-width: 0;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: var(--ap-text-label);
}

.breadcrumbs .icon {
  width: 12px;
  transform: scale(0.75);
}

.breadcrumbs strong {
  overflow: hidden;
  color: var(--muted-strong);
  font-weight: 550;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.search-trigger,
.timer-control {
  display: inline-flex;
  min-height: 36px;
  gap: 8px;
  align-items: center;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--muted-strong);
  font-size: var(--ap-text-label);
}

.search-trigger {
  min-width: 164px;
}

.search-trigger kbd {
  margin-left: auto;
}

.search-trigger .icon,
.timer-control .icon {
  width: 16px;
  height: 16px;
}

.timer-control {
  min-width: 88px;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}

.timer-control.running {
  border-color: color-mix(in srgb, var(--blue) 48%, var(--line));
  background: var(--accent-soft);
  color: var(--blue);
  box-shadow: none;
}

.theme-button {
  border-color: var(--line);
  background: var(--surface);
}

.primary-button,
.secondary-button,
.glass-button,
.light-button {
  display: inline-flex;
  min-height: 40px;
  gap: 8px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border-radius: 10px;
  font-size: var(--ap-text-label);
  font-weight: 620;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.primary-button {
  border: 1px solid color-mix(in srgb, var(--blue) 70%, var(--violet));
  background: linear-gradient(105deg, var(--action-start), var(--action-end));
  color: var(--on-action);
  box-shadow: none;
}

.primary-button:hover,
.secondary-button:hover,
.glass-button:hover,
.light-button:hover {
  transform: translateY(-1px);
}

.primary-button:hover {
  border-color: var(--blue);
  box-shadow: none;
}

.primary-button.full {
  width: 100%;
}

.primary-button .icon,
.secondary-button .icon,
.glass-button .icon,
.light-button .icon {
  width: 16px;
}

.secondary-button {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.secondary-button:hover {
  border-color: color-mix(in srgb, var(--blue) 40%, var(--line));
  color: var(--blue);
}

.glass-button,
.light-button {
  border: 1px solid var(--cover-line);
  background: var(--cover-glass);
  color: var(--on-cover);
  backdrop-filter: blur(16px);
}

.light-button {
  background: var(--cover-button-surface);
  color: var(--cover-button-ink);
}

.main-content {
  min-height: calc(100vh - var(--topbar-height));
  outline: 0;
}

.page {
  width: min(100%, 1540px);
  margin: 0 auto;
  padding: 42px var(--page-gutter) 70px;
}

.lead {
  max-width: 640px;
  margin: 20px 0 0;
  color: var(--muted-strong);
  font-size: var(--ap-text-body);
  line-height: 1.6;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-small);
}

.panel-heading {
  display: flex;
  min-height: 48px;
  gap: 9px;
  align-items: center;
  color: var(--muted-strong);
  font-size: var(--type-meta);
  font-weight: 650;
  letter-spacing: 0.025em;
}

.panel-heading > small {
  margin-left: auto;
  color: var(--muted);
  font-size: var(--type-meta);
  font-weight: 500;
}

.panel-icon {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--blue) 18%, var(--line));
  border-radius: var(--ap-radius-xs);
  background: color-mix(in srgb, var(--blue) 7%, var(--surface));
  color: var(--blue);
}

.panel-icon .icon {
  width: 14px;
  height: 14px;
}

.text-action {
  margin-left: auto;
  color: var(--blue);
  font-size: var(--type-meta);
  font-weight: 600;
}

.text-action:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Inicio */
.dashboard-intro {
  position: relative;
  min-height: 238px;
  padding: 18px 34% 42px 4px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.dashboard-intro h1,
.standard-heading h1,
.class-title-block h1,
.space-cover h1 {
  margin: 0;
  font-size: var(--type-headline);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.dashboard-intro h1 span {
  color: var(--muted);
  font-weight: 400;
}

.dashboard-feature-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(240px, 0.72fr) minmax(230px, 0.62fr);
  gap: 14px;
  margin-top: 22px;
}

.focus-card {
  position: relative;
  min-height: 284px;
  padding: 14px 20px 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 88% 20%, color-mix(in srgb, var(--violet) 13%, transparent), transparent 30%),
    radial-gradient(circle at 58% 100%, color-mix(in srgb, var(--blue) 10%, transparent), transparent 44%),
    var(--surface);
}

.focus-card::after {
  position: absolute;
  right: 0;
  bottom: 60px;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--blue) 75%, var(--violet)), transparent);
  box-shadow: none;
  content: "";
}

.focus-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: end;
  padding: 22px 0 28px;
}

.focus-content p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.focus-content h2 {
  max-width: 760px;
  margin: 0;
  font-size: var(--type-section-display);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.06;
}

.round-action {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--blue) 48%, var(--line));
  border-radius: 50%;
  background: var(--surface);
  color: var(--blue);
  transition: 160ms ease;
}

.round-action:hover {
  border-color: var(--violet);
  background: var(--ink);
  color: var(--surface);
  transform: translateX(2px);
}

.focus-meta {
  display: flex;
  min-height: 60px;
  gap: 18px;
  align-items: center;
  color: var(--muted);
  font-size: var(--type-meta);
}

.focus-meta span + span::before {
  display: inline-block;
  width: 3px;
  height: 3px;
  margin: 0 14px 2px 0;
  border-radius: 50%;
  background: var(--violet);
  content: "";
}

.goal-card {
  display: flex;
  min-height: 284px;
  flex-direction: column;
  padding: 14px 18px 18px;
}

.goal-empty-copy,
.goal-value {
  margin: auto 0 22px;
}

.goal-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.goal-actions.single { grid-template-columns: minmax(0, 1fr); margin-top: 16px; }
.goal-actions .secondary-button { width: 100%; padding-inline: 10px; }

.goal-empty-copy strong {
  display: block;
  margin-bottom: 8px;
  font-size: var(--type-title);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.goal-empty-copy p,
.goal-value p {
  margin: 0;
  color: var(--muted);
  font-size: var(--ap-text-label);
  line-height: 1.5;
}

.goal-value strong {
  display: block;
  margin-bottom: 8px;
  font-size: var(--type-metric-large);
  font-weight: 430;
  letter-spacing: -0.075em;
  line-height: 0.9;
}

.goal-value strong span {
  color: var(--violet);
  font-size: 0.45em;
}

.progress-track,
.thin-chart {
  height: 3px;
  overflow: hidden;
  border-radius: var(--ap-radius-pill);
  background: var(--surface-strong);
}

.progress-track i,
.thin-chart i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue), var(--violet));
  box-shadow: none;
}

.section-block {
  margin-top: 54px;
}

.section-block.compact-top {
  margin-top: 38px;
}

.section-heading {
  display: flex;
  gap: 24px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 19px;
}

.section-heading h2 {
  margin: 0;
  font-size: var(--type-title);
  font-weight: 520;
  letter-spacing: -0.045em;
}

.spaces-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.space-card {
  --tone1: var(--muted);
  --tone2: var(--line-strong);
  position: relative;
  display: flex;
  min-height: 196px;
  flex-direction: column;
  padding: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 98% 5%, color-mix(in srgb, var(--tone2) 12%, transparent), transparent 34%),
    linear-gradient(145deg, var(--surface), color-mix(in srgb, var(--tone1) 3%, var(--surface)));
  color: var(--ink);
  text-align: left;
  transition: 180ms ease;
}

.space-card::after {
  position: absolute;
  right: 0;
  bottom: 25px;
  width: 43%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--tone1), var(--tone2));
  box-shadow: none;
  content: "";
}

.space-card:hover {
  border-color: color-mix(in srgb, var(--tone1) 35%, var(--line));
  box-shadow: var(--shadow-small);
  transform: translateY(-3px);
}

.space-card-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  margin-bottom: auto;
}

.space-card-top > .icon {
  width: 17px;
  color: var(--tone1);
}

.space-card .space-monogram {
  --tone1: inherit;
  width: 36px;
  height: 36px;
}

.space-card > strong {
  max-width: 28ch;
  margin: 24px 0 8px;
  font-size: var(--type-subtitle);
  font-weight: 550;
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.space-card > small {
  color: var(--muted);
  font-size: var(--type-meta);
}

/* Espacio */
.space-page {
  padding-top: 22px;
}

.space-cover {
  --tone1: var(--muted);
  --tone2: var(--line-strong);
  position: relative;
  display: grid;
  min-height: 355px;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  padding: clamp(28px, 4vw, 52px);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 22px;
  background:
    radial-gradient(circle at 80% 15%, color-mix(in srgb, var(--tone2) 48%, transparent), transparent 28%),
    radial-gradient(circle at 48% 110%, color-mix(in srgb, var(--cyan) 22%, transparent), transparent 42%),
    linear-gradient(120deg, var(--action-start), color-mix(in srgb, var(--tone1) 45%, var(--action-end)) 55%, var(--action-end));
  color: #ffffff;
  box-shadow: var(--shadow);
}

.space-cover::after {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 82% 42%, color-mix(in srgb, white 16%, transparent), transparent 64%);
  content: "";
  pointer-events: none;
}

.space-cover-copy,
.cover-actions {
  position: relative;
  z-index: 2;
}

.space-cover-copy {
  max-width: 780px;
}

.space-cover .space-monogram.large {
  width: 44px;
  height: 44px;
  margin-bottom: 34px;
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  backdrop-filter: blur(12px);
}

.space-cover h1 {
  max-width: 16ch;
  font-size: var(--type-headline);
}

.space-cover-copy > p:last-child {
  max-width: 52ch;
  margin: 21px 0 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--type-body);
}

.cover-actions {
  display: flex;
  gap: 9px;
  align-items: center;
}

.note-index {
  display: grid;
  gap: 8px;
  width: min(760px, calc(100% - 50px));
  margin: 22px auto -10px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--blue);
  background: var(--surface-soft);
}

.note-index-label {
  color: var(--blue);
  font-size: var(--type-meta);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.note-index div { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.note-index button { color: var(--muted-strong); font-size: var(--type-meta); text-align: left; }
.note-index button:hover { color: var(--blue); }

.class-blocks {
  margin-bottom: 24px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.class-blocks.compact {
  margin: 12px 0 18px;
  padding: 0 0 12px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.class-blocks .section-heading { margin-bottom: 10px; }
.class-blocks h2 { font-size: var(--ap-text-body); }
.block-source-state { display: block; margin-top: 4px; color: var(--muted); font-size: var(--type-meta); }

.block-list { display: grid; gap: 5px; }

.block-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 10px;
  border: 1px solid transparent;
  border-radius: var(--ap-radius-xs);
  color: var(--muted-strong);
  text-align: left;
}

.block-row:hover,
.block-row.active { border-color: var(--line); background: var(--surface); color: var(--blue); }
.block-number { color: var(--blue); font-size: var(--type-meta); font-weight: 700; }
.block-row strong, .block-row small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.block-row small { margin-top: 3px; color: var(--muted); font-size: var(--type-meta); }
.block-row > .icon { width: 14px; color: var(--muted); }

.block-empty {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 0 2px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.block-empty p { flex: 1; margin: 0; }
.block-empty .empty-icon { width: 24px; height: 24px; }
.block-empty .primary-button { min-height: 30px; padding: 0 9px; font-size: var(--type-meta); }

.period-switch {
  display: flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.period-switch button {
  min-height: 29px;
  padding: 0 11px;
  border-radius: 7px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.period-switch button.active {
  background: var(--surface-strong);
  color: var(--ink);
}

.class-table {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.class-table-head,
.class-table-row {
  display: grid;
  grid-template-columns: minmax(300px, 1.4fr) minmax(150px, 0.55fr) minmax(130px, 0.42fr) 28px;
  gap: 20px;
  align-items: center;
  padding: 0 20px;
}

.class-table-head {
  min-height: 43px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: var(--type-meta);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.class-table-row {
  width: 100%;
  min-height: 82px;
  border-bottom: 1px solid var(--line);
  color: var(--muted-strong);
  text-align: left;
  transition: background 150ms ease;
}

.class-table-row:last-child {
  border-bottom: 0;
}

.class-table-row:hover {
  background: var(--surface-soft);
}

.class-table-row > span:first-child {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.class-marker {
  display: block;
  width: 28px;
  height: 38px;
  border: 1px solid color-mix(in srgb, var(--blue) 28%, var(--line));
  border-radius: 7px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--blue) 8%, var(--surface)), color-mix(in srgb, var(--violet) 7%, var(--surface)));
}

.class-table-row strong,
.class-table-row small {
  display: block;
}

.class-table-row strong {
  overflow: hidden;
  color: var(--ink);
  font-size: var(--ap-text-label);
  font-weight: 580;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.class-table-row small {
  margin-top: 4px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.class-table-row > span:nth-child(2) {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: var(--type-meta);
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
}

.status-dot.ready { background: var(--success); box-shadow: none; }
.status-dot.review { background: var(--warning); box-shadow: none; }

.class-table-row > span:nth-child(3) {
  color: var(--muted);
  font-size: var(--type-meta);
}

.class-table-row > span:last-child {
  color: var(--blue);
}

.class-table-row > span:last-child .icon {
  width: 16px;
}

.empty-state {
  display: grid;
  min-height: 330px;
  place-items: center;
  align-content: center;
  padding: 40px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
}

.empty-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
  color: var(--blue);
}

.empty-state h3 {
  margin: 19px 0 7px;
  font-size: var(--type-title);
  font-weight: 540;
  letter-spacing: -0.035em;
}

.empty-state p {
  max-width: 46ch;
  margin: 0 0 23px;
  color: var(--muted);
  font-size: var(--ap-text-label);
}

/* Clase */
.class-page {
  padding-top: 58px;
}

.class-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(300px, 0.63fr);
  gap: 70px;
  align-items: end;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.back-link {
  display: inline-flex;
  max-width: 430px;
  gap: 8px;
  align-items: center;
  margin-bottom: 42px;
  color: var(--muted);
  font-size: var(--type-meta);
  text-align: left;
}

.back-link:hover {
  color: var(--blue);
}

.back-link .icon {
  width: 14px;
  transform: rotate(180deg);
}

.status-pill {
  display: inline-flex;
  min-height: 28px;
  gap: 8px;
  align-items: center;
  margin-bottom: 20px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--ap-radius-pill);
  color: var(--muted-strong);
  font-size: var(--type-meta);
}

.status-pill i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
}

.status-pill.ready i { background: var(--success); }
.status-pill.review i { background: var(--warning); }

.class-title-block h1 {
  max-width: 14ch;
  font-size: var(--type-headline);
}



.class-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.55fr);
  gap: 18px;
  margin-top: 46px;
}

.section-heading.inline {
  min-height: 68px;
  margin-bottom: 14px;
}




.document-type {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--ap-radius-sm);
  background: var(--surface);
  color: var(--blue);
}




.future-tag,
.prototype-badge {
  padding: 6px 9px;
  border: 1px solid color-mix(in srgb, var(--violet) 30%, var(--line));
  border-radius: var(--ap-radius-pill);
  background: color-mix(in srgb, var(--violet) 6%, var(--surface));
  color: var(--violet);
  font-size: var(--type-meta);
  white-space: nowrap;
}






.check-list {
  margin-bottom: 22px;
  border-top: 1px solid var(--line);
}

.check-list p {
  display: flex;
  gap: 9px;
  align-items: center;
  margin: 0;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted-strong);
  font-size: var(--type-meta);
}

.check-list .icon {
  width: 15px;
  color: var(--success);
}

.check-list p.pending .icon {
  color: var(--warning);
}

/* Editor */
body:is([data-route="document"], [data-route="summary"]) .main-content {
  min-height: calc(100vh - var(--topbar-height));
}

.document-page {
  display: grid;
  grid-template-columns: 198px minmax(480px, 1fr) 234px;
  min-height: calc(100vh - var(--topbar-height));
  background: var(--surface-soft);
}

.document-nav,
.editor-inspector {
  padding: 24px 16px;
  background: var(--surface);
}

.document-nav {
  border-right: 1px solid var(--line);
}

.document-nav .back-link {
  margin-bottom: 36px;
}

.document-nav-link {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr) auto;
  width: 100%;
  min-height: 40px;
  gap: 9px;
  align-items: center;
  padding: 0 9px;
  border-radius: 9px;
  color: var(--muted-strong);
  font-size: var(--type-meta);
  text-align: left;
}

.document-nav-link:hover,
.document-nav-link.active {
  background: var(--surface-soft);
  color: var(--blue);
}

.document-nav-link .icon {
  width: 15px;
}

.document-nav-link small {
  color: var(--muted);
  font-size: var(--type-meta);
}

.document-source-summary {
  display: grid;
  gap: 7px;
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.document-source-summary span {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: var(--type-meta);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.document-source-summary strong {
  font-size: var(--type-meta);
  font-weight: 520;
}

.editor-shell {
  min-width: 0;
}

.editor-header {
  display: flex;
  min-height: 66px;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.editor-header p,
.editor-header strong {
  display: block;
  max-width: 56vw;
  overflow: hidden;
  margin: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.editor-header p {
  color: var(--muted);
  font-size: var(--type-meta);
}

.editor-header strong {
  margin-top: 3px;
  font-size: var(--type-meta);
  font-weight: 580;
}

.editor-header > div:last-child {
  display: flex;
  gap: 12px;
  align-items: center;
}

.save-state {
  color: var(--muted);
  font-size: var(--type-meta);
}

.editor-toolbar {
  position: sticky;
  z-index: 10;
  top: var(--topbar-height);
  display: flex;
  min-height: 49px;
  gap: 5px;
  align-items: center;
  padding: 0 22px;
  border-bottom: 1px solid var(--glass-line);
  background: var(--glass-surface);
  backdrop-filter: blur(16px) saturate(120%);
}

.editor-toolbar button {
  display: inline-flex;
  min-width: 31px;
  min-height: 31px;
  gap: 7px;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border-radius: 7px;
  color: var(--muted-strong);
  font-size: var(--type-meta);
}

.editor-toolbar button:hover {
  background: var(--surface-strong);
  color: var(--ink);
}

.editor-toolbar > span {
  width: 1px;
  height: 20px;
  margin: 0 5px;
  background: var(--line);
}

.editor-toolbar .icon {
  width: 14px;
}

.editor-warning {
  display: flex;
  gap: 12px;
  align-items: start;
  margin: 22px auto 0;
  width: min(740px, calc(100% - 40px));
  padding: 13px 15px;
  border: 1px solid color-mix(in srgb, var(--warning) 32%, var(--line));
  border-radius: 11px;
  background: color-mix(in srgb, var(--warning) 7%, var(--surface));
  color: var(--muted-strong);
}

.editor-warning .icon {
  width: 16px;
  color: var(--warning);
}

.editor-warning p {
  margin: 0;
  font-size: var(--type-meta);
}

.paper-sheet {
  width: min(760px, calc(100% - 50px));
  min-height: 820px;
  margin: 28px auto 70px;
  padding: clamp(44px, 6vw, 82px);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-small);
}

.paper-kicker {
  margin: 0 0 19px;
  color: var(--blue);
  font-size: var(--type-meta);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.paper-sheet h1 {
  margin: 0;
  font-size: var(--type-paper-heading);
  font-weight: 520;
  letter-spacing: -0.055em;
  line-height: 1.03;
}

.paper-rule {
  position: relative;
  height: 1px;
  margin: 30px 0 0;
  background: var(--line);
}

.paper-rule::after {
  position: absolute;
  top: 0;
  left: 0;
  width: 30%;
  height: 1px;
  background: linear-gradient(90deg, var(--blue), var(--violet));
  box-shadow: none;
  content: "";
}

.editable-note {
  min-height: 530px;
  padding-top: 42px;
  font-family: var(--font-interface);
  font-size: var(--type-reading);
  line-height: 1.76;
  outline: 0;
  white-space: pre-wrap;
}

.editable-note:empty::before {
  color: var(--muted);
  content: attr(data-placeholder);
  pointer-events: none;
}

.editable-note h2 {
  margin: 36px 0 14px;
  font-size: var(--type-title);
  font-weight: 580;
  letter-spacing: -0.035em;
}

.editor-inspector {
  border-left: 1px solid var(--line);
}

.inspector-section {
  padding: 0 3px 23px;
  margin-bottom: 23px;
  border-bottom: 1px solid var(--line);
}

.inspector-section p {
  margin: 0;
  color: var(--muted);
  font-size: var(--type-meta);
  line-height: 1.55;
}

.inspector-section dl {
  margin: 0;
}

.inspector-section dl div {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding: 8px 0;
}

.inspector-section dt,
.inspector-section dd {
  margin: 0;
  font-size: var(--type-meta);
}

.inspector-section dt { color: var(--muted); }
.inspector-section dd { color: var(--muted-strong); }

.audio-quality {
  display: block;
  margin: 8px 0;
  color: var(--blue);
  font-size: var(--type-metric);
  font-weight: 450;
  letter-spacing: -0.06em;
}

/* Cabeceras interiores */
.standard-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  align-items: end;
  min-height: 230px;
  padding: 15px 0 44px;
  border-bottom: 1px solid var(--line);
}

.standard-heading h1 {
  font-size: var(--type-display);
}

.prototype-badge {
  align-self: start;
  margin-top: 17px;
}

.feature-icon {
  --feature-color: var(--blue);
  display: grid;
  width: 45px;
  height: 45px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--feature-color) 32%, var(--line));
  border-radius: 13px;
  color: var(--feature-color);
}

/* Estadísticas */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.metric-card {
  display: flex;
  min-height: 194px;
  flex-direction: column;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.metric-card > span {
  color: var(--muted);
  font-size: var(--type-meta);
}

.metric-card > strong {
  margin: auto 0 8px;
  font-size: var(--type-metric);
  font-weight: 450;
  letter-spacing: -0.07em;
}

.metric-card > p {
  min-height: 31px;
  margin: 0;
  color: var(--muted);
  font-size: var(--type-meta);
  line-height: 1.5;
}

.metric-card .progress-track {
  margin-top: 15px;
}

.metric-card .text-action {
  align-self: flex-start;
  margin-top: 12px;
}

.content-metric {
  border-color: color-mix(in srgb, var(--violet) 24%, var(--line));
}

.featured-metric {
  background:
    radial-gradient(circle at 100% 0, color-mix(in srgb, var(--violet) 13%, transparent), transparent 40%),
    var(--surface);
}

.stats-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.58fr);
  gap: 14px;
  margin-top: 14px;
}

.weekly-chart,
.distribution-panel {
  padding: 4px 20px 20px;
}

.chart-empty {
  position: relative;
  display: flex;
  min-height: 288px;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-top: 1px solid var(--line);
}

.chart-grid-lines {
  position: absolute;
  inset: 20px 0 34px;
  display: grid;
  grid-template-rows: repeat(4, 1fr);
}

.chart-grid-lines i {
  border-bottom: 1px solid var(--line);
}

.chart-days {
  position: absolute;
  right: 0;
  bottom: 7px;
  left: 0;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  color: var(--muted);
  font-size: var(--type-meta);
  text-align: center;
}

.chart-empty > p {
  position: relative;
  z-index: 1;
  max-width: 27ch;
  color: var(--muted);
  font-size: var(--type-meta);
  text-align: center;
}

.real-time-bar {
  position: absolute;
  right: 10%;
  bottom: 34px;
  width: 24px;
  min-height: 8px;
  border-radius: 7px 7px 0 0;
  background: linear-gradient(180deg, var(--violet), var(--blue));
  box-shadow: none;
}

.distribution-row {
  display: flex;
  min-height: 70px;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
}

.distribution-row > span {
  display: grid;
  grid-template-columns: 7px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  color: var(--muted-strong);
  font-size: var(--type-meta);
}

.distribution-row i {
  --tone1: var(--blue);
  display: block;
  width: 6px;
  height: 24px;
  border-radius: var(--ap-radius-pill);
  background: var(--tone1);
  box-shadow: none;
}

.distribution-row strong {
  font-size: var(--type-meta);
  font-weight: 600;
}

/* Modales */
.modal {
  width: min(620px, calc(100vw - 32px));
  max-height: min(820px, calc(100vh - 32px));
  padding: 0;
  overflow: auto;
  border: 1px solid var(--glass-line);
  border-radius: 20px;
  background: var(--glass-surface-strong);
  color: var(--ink);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(18px) saturate(120%);
}

.modal::backdrop {
  background: var(--overlay-scrim);
  backdrop-filter: blur(8px);
}

.search-modal {
  width: min(680px, calc(100vw - 32px));
}

/* Cartel de reseña tras exportar (app.js): misma línea que el panel de novedades, en pequeño. */
.review-dialog {
  --review-surface: #fffaf3;
  --review-hero: #ffe6ee;
  --review-ink: var(--ap-ink, #1f1419);
  --review-ink-2: var(--ap-ink-2, #4b3d45);
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  padding: 0;
  border: 0;
  border-radius: 32px;
  background: var(--review-surface);
  color: var(--review-ink);
  box-shadow: 0 40px 120px rgba(31, 20, 25, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.6) inset;
  overflow: auto;
  font-family: var(--ap-font, "Figtree", system-ui, sans-serif);
}
.review-dialog::backdrop { background: rgba(31, 20, 25, 0.52); backdrop-filter: blur(3px); }
.review-dialog[open] { animation: review-in 0.45s var(--ap-ease-spring, cubic-bezier(0.2, 1.2, 0.3, 1)) both; }
@keyframes review-in { from { opacity: 0; transform: translateY(24px) scale(0.97); } to { opacity: 1; transform: none; } }
:root[data-theme="dark"] .review-dialog {
  --review-surface: var(--ap-paper-dark, #0b2123);
  --review-hero: #3a1626;
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}
.review-hero { position: relative; display: flex; align-items: center; gap: 18px; padding: 28px 64px 28px 28px; background: var(--review-hero); }
.review-hero-bloop { flex-shrink: 0; width: 120px; height: auto; filter: drop-shadow(0 14px 24px rgba(224, 47, 114, 0.35)); animation: review-float 4s ease-in-out infinite; }
@keyframes review-float { 50% { transform: translateY(-6px) rotate(-2deg); } }
.review-hero-copy { display: flex; flex-direction: column; gap: 10px; }
.review-hero-copy h2 { margin: 0; font-family: var(--ap-font-display, "Bricolage Grotesque", sans-serif); font-size: 28px; font-weight: 800; line-height: 1.05; letter-spacing: -0.02em; }
.review-hero-copy p { margin: 0; font-size: 15.5px; line-height: 1.45; color: var(--review-ink-2); }
.review-chip { align-self: flex-start; display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; background: var(--ap-brand, #ff4d8b); color: #1f1419; font-size: 13px; font-weight: 700; letter-spacing: 0.02em; }
.review-chip svg { width: 14px; height: 14px; }
.review-close { position: absolute; top: 16px; right: 16px; width: 40px; height: 40px; display: grid; place-items: center; border: 0; border-radius: 50%; background: rgba(255, 250, 243, 0.88); color: #1f1419; cursor: pointer; }
.review-actions { display: flex; flex-direction: column-reverse; align-items: flex-end; gap: 10px; padding: 18px 24px 20px; }
.review-actions > div { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.review-actions .primary-button { text-decoration: none; }
.review-feedback { padding: 6px 0; border: 0; background: none; color: var(--review-ink-2); font: inherit; font-size: 14px; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.review-close:focus-visible, .review-actions :is(a, button):focus-visible { outline: 2px solid var(--ap-brand, #ff4d8b); outline-offset: 3px; }
/* Escritorio e iPad: el enlace de sugerencias a la izquierda, en la misma fila que los botones. */
@media (min-width: 721px) {
  .review-actions { flex-direction: row; justify-content: space-between; align-items: center; gap: 12px; }
  .review-actions > div { flex: none; flex-wrap: nowrap; }
  .review-feedback { min-width: 0; text-align: left; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) { .review-dialog[open], .review-hero-bloop { animation: none; } }
/* Móvil: hoja inferior, como las novedades. */
@media (max-width: 720px) {
  .review-dialog { width: 100vw; max-width: 100vw; margin: auto 0 0; border-radius: 28px 28px 0 0; }
  .review-hero { flex-direction: column; align-items: flex-start; padding: 22px 20px 20px; }
  .review-hero-bloop { width: 96px; }
  .review-hero-copy h2 { font-size: 24px; }
  .review-actions { align-items: stretch; padding: 14px 16px calc(18px + env(safe-area-inset-bottom)); }
  .review-actions > div { flex-direction: column-reverse; }
  .review-actions > div > * { justify-content: center; }
}

.modal-shell {
  min-height: 100%;
}

.modal-head {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}

.modal-head h2 {
  margin: 0;
  font-size: var(--type-title);
  font-weight: 540;
  letter-spacing: -0.04em;
}

.modal-content {
  padding: 24px;
}

.modal-form {
  display: grid;
  gap: 20px;
}

.field {
  display: grid;
  gap: 8px;
}

.field > span,
.choice-field legend,
.segmented-field legend,
.cover-choices legend {
  color: var(--muted-strong);
  font-size: var(--type-meta);
  font-weight: 650;
}

.field input,
.field select {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface-soft);
  outline: 0;
}

.field input::placeholder {
  color: var(--muted);
}

.field.hidden {
  display: none;
}

.choice-field,
.segmented-field,
.cover-choices {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  border: 0;
}

.choice-field legend,
.segmented-field legend,
.cover-choices legend {
  width: 100%;
  margin-bottom: 9px;
}

.choice-field label {
  display: flex;
  min-height: 40px;
  gap: 7px;
  align-items: center;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: var(--type-meta);
}

.choice-field input,
.segmented-field input,
.cover-choice input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.choice-field label:has(input:checked),
.cover-choice:has(input:checked) {
  border-color: color-mix(in srgb, var(--blue) 50%, var(--line));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--blue) 18%, transparent);
}

.tone-choice {
  --tone1: var(--blue);
  display: block;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--tone1);
  box-shadow: none;
}

.segmented-field {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-soft);
}

.segmented-field legend {
  grid-column: 1 / -1;
  padding: 0 0 8px;
}

.segmented-field label span {
  display: grid;
  min-height: 38px;
  place-items: center;
  border-radius: var(--ap-radius-xs);
  color: var(--muted);
  font-size: var(--type-meta);
  cursor: pointer;
}

.segmented-field label:has(input:checked) span {
  background: var(--surface);
  color: var(--blue);
  box-shadow: var(--shadow-small);
}

.upload-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.upload-field {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  min-height: 80px;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border: 1px dashed var(--line-strong);
  border-radius: 11px;
  background: var(--surface-soft);
  cursor: pointer;
}

.upload-field > .icon {
  width: 19px;
  color: var(--blue);
}

.upload-field strong,
.upload-field small {
  display: block;
}

.upload-field strong {
  font-size: var(--type-meta);
}

.upload-field small {
  max-width: 20ch;
  overflow: hidden;
  margin-top: 3px;
  color: var(--muted);
  font-size: var(--type-meta);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.upload-field input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.form-help {
  margin: 0;
  color: var(--muted);
  font-size: var(--type-meta);
  line-height: 1.55;
}

/* Versiones anteriores de unos apuntes: una fila por copia, la fecha a la izquierda y Descargar a la derecha. */
.note-backups {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.note-backups li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* Historial de versiones (como el de Google Docs). */
.note-versions {
  display: grid;
  gap: 4px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.note-versions li > span,
.note-version {
  display: grid;
  gap: 2px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--ap-radius-xs);
  background: none;
  color: var(--ink);
  font: inherit;
  text-align: left;
}

.note-version { cursor: pointer; }
.note-version:hover,
.note-version:focus-visible { border-color: var(--line); background: var(--surface-soft); }
.note-versions .is-current > span { border-color: var(--line); }
.note-versions small,
.note-backups small { display: block; color: var(--muted); font-size: var(--type-meta); }
[data-note-history] h3 { margin: 18px 0 0; font-size: var(--type-ui); }

.note-version-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.note-version-preview {
  max-height: min(60vh, 640px);
  margin-top: 12px;
  padding: 24px clamp(16px, 4vw, 40px);
  overflow: auto;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  line-height: var(--leading-body);
}

.note-version-preview img { max-width: 100%; height: auto; }
.note-version-warning { margin: 0 0 10px; color: var(--muted-strong); }

.modal-actions {
  display: flex;
  gap: 9px;
  justify-content: flex-end;
  padding-top: 8px;
}

.search-field {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  min-height: 48px;
  padding: 0 13px;
  border: 1px solid color-mix(in srgb, var(--blue) 32%, var(--line));
  border-radius: 11px;
  background: var(--surface-soft);
}

.search-field .icon {
  width: 17px;
  color: var(--blue);
}

.search-field input {
  width: 100%;
  border: 0;
  background: transparent;
  outline: 0;
}

.search-results {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.search-result {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 20px;
  width: 100%;
  min-height: 62px;
  gap: 11px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.search-result:hover strong {
  color: var(--blue);
}

.search-result-icon {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  border-radius: var(--ap-radius-xs);
  background: var(--surface-soft);
  color: var(--blue);
}

.search-result-icon .icon {
  width: 14px;
}

.search-result strong,
.search-result small {
  display: block;
}

.search-result strong {
  font-size: var(--type-meta);
  font-weight: 580;
}

.search-result small {
  margin-top: 3px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.search-result > .icon {
  width: 15px;
  color: var(--muted);
}

.search-empty {
  padding: 42px 0;
  color: var(--muted);
  font-size: var(--type-meta);
  text-align: center;
}

.cover-choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.cover-choice {
  --tone1: var(--blue);
  --tone2: var(--violet);
  display: block;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 11px;
  cursor: pointer;
}

.cover-choice > span {
  position: relative;
  display: block;
  height: 76px;
  overflow: hidden;
  border-radius: var(--ap-radius-xs);
  background: linear-gradient(130deg, var(--action-start), color-mix(in srgb, var(--tone1) 48%, var(--action-end)));
}

.cover-choice > span i {
  position: absolute;
  top: 14px;
  right: 10px;
  width: 48px;
  height: 48px;
  border: 1px solid color-mix(in srgb, var(--tone2) 65%, white);
  border-radius: 50%;
}

.cover-choice > span i:nth-child(2) { inset: 26px 22px auto auto; width: 24px; height: 24px; }
.cover-choice > span i:nth-child(3) { top: auto; right: auto; bottom: 13px; left: 9px; width: 50px; height: 1px; border: 0; border-radius: 0; background: linear-gradient(90deg, var(--tone1), var(--tone2)); box-shadow: none; }

.cover-choice strong {
  display: block;
  margin: 8px 2px 2px;
  font-size: var(--type-meta);
  font-weight: 580;
}

.toast {
  position: fixed;
  z-index: var(--ap-z-toast);
  right: 22px;
  bottom: 22px;
  max-width: min(390px, calc(100vw - 44px));
  padding: 12px 16px;
  border: 1px solid var(--glass-line);
  border-radius: 11px;
  background: var(--glass-surface-strong);
  color: var(--ink);
  box-shadow: var(--glass-shadow);
  font-size: var(--type-meta);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: 180ms ease;
  backdrop-filter: blur(18px);
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Correcciones funcionales V2 */
.sidebar {
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.timer-control small {
  display: grid;
  min-width: 20px;
  height: 20px;
  place-items: center;
  border-left: 1px solid var(--line);
  color: var(--blue);
  font-size: var(--type-meta);
  font-weight: 700;
}

.home-subjects {
  margin-top: 4px;
  margin-bottom: 26px;
}

.goal-value small {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.stats-heading {
  align-items: end;
}

.stats-scope-switch {
  display: grid;
  grid-template-columns: 0.55fr repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 20px;
}

.stats-scope-switch > button {
  display: flex;
  min-width: 0;
  min-height: 58px;
  gap: 9px;
  align-items: center;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
  color: var(--muted-strong);
  font-size: var(--type-meta);
  line-height: 1.25;
  text-align: left;
  transition: 160ms ease;
}

.stats-scope-switch > button:first-child {
  justify-content: center;
  font-size: var(--type-meta);
  font-weight: 650;
}

.stats-scope-switch > button:hover,
.stats-scope-switch > button.active {
  border-color: color-mix(in srgb, var(--blue) 42%, var(--line));
  background: color-mix(in srgb, var(--blue) 5%, var(--surface));
  color: var(--ink);
  box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--blue) 65%, var(--violet));
}

.stats-scope-switch .space-monogram {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  font-size: var(--type-meta);
}

.activity-chart {
  position: relative;
  display: grid;
  min-height: 288px;
  grid-template-columns: repeat(7, 1fr);
  gap: clamp(5px, 1vw, 14px);
  align-items: end;
  padding: 28px 8px 10px;
  border-top: 1px solid var(--line);
  background: repeating-linear-gradient(to bottom, transparent 0, transparent 63px, var(--line) 64px);
}

.activity-chart.month {
  grid-template-columns: repeat(30, minmax(3px, 1fr));
  gap: 3px;
}

.activity-bar {
  display: grid;
  height: 238px;
  grid-template-rows: minmax(0, 1fr) 18px;
  gap: 7px;
  align-items: end;
}

.activity-bar i {
  display: block;
  width: min(28px, 70%);
  min-height: 2px;
  justify-self: center;
  border-radius: 6px 6px 1px 1px;
  background: linear-gradient(180deg, var(--violet), var(--blue));
  box-shadow: none;
}

.activity-bar span {
  color: var(--muted);
  font-size: var(--type-meta);
  text-align: center;
}

.activity-chart.month .activity-bar span {
  visibility: hidden;
}

.activity-chart.month .activity-bar:nth-child(5n) span,
.activity-chart.month .activity-bar:last-child span {
  visibility: visible;
}

.activity-chart > p {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: var(--type-meta);
}

.distribution-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 12px;
}

.distribution-row > small {
  grid-column: 1 / -1;
  padding: 0 0 10px 17px;
  color: var(--muted);
  font-size: var(--type-meta);
}

.stats-context {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-top: 14px;
  padding: 18px 22px;
  overflow: hidden;
}

.stats-context h2,
.stats-context p {
  margin: 0;
}

.stats-context h2 {
  margin-top: 5px;
  font-size: var(--ap-text-subtitle);
  font-weight: 560;
  letter-spacing: -0.03em;
}

.stats-context div > p:last-child {
  margin-top: 7px;
  color: var(--muted);
  font-size: var(--type-meta);
}

@media (max-width: 1180px) {
  :root { --sidebar-width: 246px; }
  .dashboard-feature-grid { grid-template-columns: minmax(0, 1.5fr) minmax(230px, 0.7fr); }
  .document-page { grid-template-columns: 180px minmax(440px, 1fr); }
  .editor-inspector { display: none; }
}

@media (max-width: 980px) {
  .app-shell { display: block; }
  .sidebar { position: fixed; top: 0; bottom: 0; left: 0; width: min(310px, 88vw); transform: translateX(-105%); transition: transform 220ms ease; box-shadow: var(--shadow); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-close,
  .menu-button { display: inline-grid; }
  .sidebar-scrim { position: fixed; z-index: 45; inset: 0; display: block; background: var(--overlay-scrim); opacity: 0; pointer-events: none; transition: opacity 180ms ease; }
  .sidebar-scrim.visible { opacity: 1; pointer-events: auto; }
  .topbar { grid-template-columns: 38px 64px minmax(0, 0.7fr) minmax(170px, 1fr) auto; gap: 8px; padding-left: 12px; }
  .dashboard-feature-grid { grid-template-columns: 1fr 1fr; }
  .focus-card { grid-column: 1 / -1; }
  .spaces-grid { grid-template-columns: repeat(2, 1fr); }
  .class-intro,
  .class-layout { margin-top: 10px; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stats-scope-switch { grid-template-columns: 0.55fr repeat(2, minmax(0, 1fr)); }
  .stats-scope-switch > button:last-child { grid-column: 2 / 4; }
}

@media (max-width: 760px) {
  :root { --page-gutter: 18px; }
  .topbar { padding-right: 10px; }
  .topbar { grid-template-columns: 38px 64px minmax(0, 1fr) auto; }
  .breadcrumbs,
  .search-trigger,
  .theme-button,
  .top-add span { display: none; }
  .top-add { width: 36px; min-width: 36px; padding: 0; }
  .dashboard-intro { padding-right: 4px; }
  .dashboard-feature-grid,
  .spaces-grid,
  .metric-grid { grid-template-columns: 1fr; }
  .space-cover { min-height: 430px; grid-template-columns: 1fr; align-content: end; gap: 28px; }
  .cover-actions { align-items: flex-start; }
  .class-table-head { display: none; }
  .class-table-row { grid-template-columns: minmax(0, 1fr) 24px; gap: 12px; padding: 14px; }
  .class-table-row > span:nth-child(2),
  .class-table-row > span:nth-child(3) { grid-column: 1; padding-left: 40px; }
  .class-table-row > span:last-child { grid-row: 1 / 4; grid-column: 2; }
  .class-intro { gap: 28px; }
  .document-page { display: block; }
  .document-nav { display: none; }
  .editor-header { align-items: flex-start; padding: 12px 14px; }
  .save-state { display: none; }
  .editor-toolbar { overflow-x: auto; padding: 0 12px; }
  .paper-sheet { width: calc(100% - 24px); margin-top: 12px; padding: 36px 24px; }
  .standard-heading { grid-template-columns: 1fr; min-height: 210px; gap: 20px; }
  .prototype-badge { justify-self: start; margin-top: 0; }
  .stats-scope-switch { grid-template-columns: 1fr; }
  .stats-scope-switch > button:last-child { grid-column: auto; }
  .stats-context { grid-template-columns: 1fr; }
  .stats-context > .secondary-button { grid-column: 1 / -1; width: 100%; }
}

@media (max-width: 1180px) {
  :root { --sidebar-width: 252px; }
  .document-page { grid-template-columns: 190px minmax(440px, 1fr); }
}

@media (max-width: 980px) {
  .topbar { grid-template-columns: 38px 60px minmax(0, 1fr) auto; }
  .menu-button { grid-column: 1; }
  .history-controls { grid-column: 2; }
  .history-controls { gap: 0; }
  .breadcrumbs { grid-column: 3; }
  .topbar-actions { grid-column: 4; }
  .breadcrumbs { display: flex; }
  .dashboard-feature-grid { grid-template-columns: 1fr 1fr; }
  .class-intro,
  .class-layout { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  :root { --page-gutter: 16px; }
  .topbar { grid-template-columns: 36px 58px minmax(0, 1fr) auto; }
  .breadcrumbs { display: none; }
  .dashboard-intro { min-height: 210px; padding: 42px 0 30px; }
  .dashboard-intro::after { width: 32%; }
  .dashboard-intro h1 { font-size: var(--type-display-mobile); }
  .spaces-grid { grid-template-columns: 1fr; border-right: 1px solid var(--line); border-bottom: 0; }
  .space-card { min-height: 132px; border-right: 0; border-bottom: 1px solid var(--line); }
  .space-cover { min-height: 360px; }
  .cover-actions { display: grid; width: 100%; grid-template-columns: 1fr 1fr; }
  .cover-actions .light-button { grid-column: 1 / -1; }
  .class-title-block { padding-left: 0; }
  .class-intro { padding-bottom: 28px; }
  .class-layout { margin-top: 24px; }
  .document-page { display: block; }
  .paper-sheet { width: calc(100% - 20px); padding: 36px 22px; }
  .editor-toolbar button[data-action="generate-note"] { display: none; }
}

@media (max-width: 480px) {
  .dashboard-intro h1,
  .class-title-block h1,
  .space-cover h1 { font-size: var(--type-display-mobile); }
  .dashboard-feature-grid,
  .focus-card { min-height: 250px; }
}

/* ================================================================
   V5 — navigation containment and photographic covers
   ================================================================ */

/* The subject tree owns its scroll area; fixed study tools never overlap it. */
.brand-row,
.primary-nav,
.tools-nav,
.sidebar-footer { flex: 0 0 auto; }

.sidebar > .nav-section:not(.tools-nav) {
  min-height: 0;
  flex: 1 1 auto;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.space-list,
.space-tree,
.space-folder-list,
.space-folder-item,
.space-block-list { min-width: 0; }

.space-tree { overflow: hidden; }
.space-link { grid-template-columns: minmax(0, 1fr) 24px; gap: 2px; }
.space-main {
  display: grid;
  min-width: 0;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  color: inherit;
  text-align: left;
}
.space-link-copy { min-width: 0; }
.space-chevron { width: 24px; height: 28px; border-radius: 4px; }
.space-chevron:hover { background: color-mix(in srgb, var(--blue) 7%, var(--surface)); color: var(--blue); }
.space-tree.open .space-chevron { transform: rotate(90deg); }
.space-tree:not(.open) .space-folder-list { display: none; }
.space-folder-list { width: auto; padding-right: 4px; }

.tools-nav,
.sidebar-footer {
  position: relative;
  z-index: 3;
  background: var(--surface);
}

.sidebar-footer { margin-top: 0; }

/* Only the two history arrows remain on the left of the top bar. */
.topbar { grid-template-columns: 60px minmax(0, 1fr) auto; }
.breadcrumbs { display: none; }
.topbar-actions { min-width: 0; justify-content: flex-end; }

/* Photographic subject covers. */
.space-cover.has-photo {
  background-color: var(--blue);
  background-image: var(--space-cover-image);
  background-position: center;
  background-size: cover;
}

.space-cover.has-photo::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  background: linear-gradient(90deg, color-mix(in srgb, var(--action-start) 94%, transparent) 0%, color-mix(in srgb, var(--blue) 72%, transparent) 48%, color-mix(in srgb, var(--action-start) 25%, transparent) 100%);
  content: "";
  pointer-events: none;
}

.space-cover.has-photo::after { opacity: .34; }

.space-card.has-photo {
  background-color: var(--blue);
  background-image: linear-gradient(180deg, color-mix(in srgb, var(--action-start) 50%, transparent), color-mix(in srgb, var(--action-start) 90%, transparent)), var(--space-cover-image);
  background-position: center;
  background-size: cover;
  color: #fff;
}

.space-card.has-photo > strong,
.space-card.has-photo > small,
.space-card.has-photo .space-card-top > .icon { color: #fff; }
.space-card.has-photo > small { opacity: .72; }
.space-card.has-photo .space-monogram {
  border-color: rgba(255, 255, 255, .45);
  background: rgba(255, 255, 255, .12);
  color: #fff;
}

.cover-upload {
  position: relative;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--ap-radius-xs);
  cursor: pointer;
}

.cover-upload:hover { border-color: var(--blue); }
.cover-upload input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.cover-upload-preview {
  display: grid;
  min-height: 88px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: color-mix(in srgb, var(--blue) 7%, var(--surface));
  background-position: center;
  background-size: cover;
  color: var(--blue);
}
.cover-upload-preview .icon { width: 24px; }
.cover-upload > span:nth-child(2) { min-width: 0; }
.cover-upload strong,
.cover-upload small { display: block; }
.cover-upload strong { font-size: var(--type-ui); font-weight: 620; }
.cover-upload small { margin-top: 5px; overflow: hidden; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); text-overflow: ellipsis; white-space: nowrap; }
.remove-cover { display: flex; gap: 9px; align-items: center; color: var(--muted-strong); font-size: var(--type-meta); }
.remove-cover input { accent-color: var(--blue); }

@media (max-width: 980px) {
  .topbar { grid-template-columns: 38px 60px minmax(0, 1fr) auto; }
  .menu-button { grid-column: 1; }
  .history-controls { grid-column: 2; }
  .topbar-actions { grid-column: 4; }
}

@media (max-width: 760px) {
  .topbar { grid-template-columns: 36px 58px minmax(0, 1fr) auto; }
  .cover-upload { grid-template-columns: 100px minmax(0, 1fr); }
  .cover-upload-preview { min-height: 72px; }
}


/* ================================================================
   V6 — scalable library management and continuous reading
   ================================================================ */

.app-shell {
  grid-template-columns: var(--sidebar-current-width, 286px) minmax(0, 1fr);
  transition: grid-template-columns 180ms ease;
}

.sidebar {
  position: relative;
  width: var(--sidebar-current-width, 286px);
  min-width: 0;
  transition: transform 180ms ease, visibility 180ms ease;
}

.app-shell.sidebar-collapsed { grid-template-columns: 0 minmax(0, 1fr); }
.app-shell.sidebar-collapsed .sidebar { visibility: hidden; transform: translateX(-100%); }
.app-shell.sidebar-collapsed .menu-button { display: grid; }
.sidebar-collapse { display: grid; flex: 0 0 auto; }

.sidebar-resizer {
  position: absolute;
  z-index: 8;
  top: 0;
  right: -4px;
  bottom: 0;
  width: 8px;
  cursor: col-resize;
  outline: 0;
}
.sidebar-resizer::after {
  position: absolute;
  top: 0;
  right: 3px;
  bottom: 0;
  width: 1px;
  background: transparent;
  content: "";
  transition: background 120ms ease;
}
.sidebar-resizer:hover::after,
.sidebar-resizer:focus-visible::after,
.resizing-sidebar .sidebar-resizer::after { background: var(--blue); }
.resizing-sidebar { cursor: col-resize; user-select: none; }

.space-monogram.has-image { overflow: hidden; padding: 0; background: var(--surface); }
.space-monogram.has-image img { display: block; width: 100%; height: 100%; object-fit: cover; }

.space-folder > span:last-child { min-width: 0; }
.space-folder strong,
.space-folder small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.space-folder strong { font-size: var(--type-ui); font-weight: 600; line-height: 1.25; }
.space-folder small { margin-top: 2px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.space-tree-empty,
.space-list-empty {
  margin: 6px 6px 4px;
  color: var(--muted);
  font-size: var(--type-meta);
  line-height: var(--leading-body);
}
.space-tree-manage {
  width: 100%;
  padding: 5px 6px;
  color: var(--blue);
  font-size: var(--type-meta);
  text-align: left;
}
.space-tree-manage:hover { text-decoration: underline; }
.space-block-list { display: none; }

.sidebar-collection { margin-top: 8px; border-top: 1px solid var(--line); }
.sidebar-collection-toggle {
  display: grid;
  width: 100%;
  min-height: 36px;
  grid-template-columns: 18px minmax(0, 1fr) auto 16px;
  gap: 7px;
  align-items: center;
  padding: 0 7px;
  color: var(--muted-strong);
  font-size: var(--type-ui);
  text-align: left;
}
.sidebar-collection-toggle > .icon { width: 14px; }
.sidebar-collection-toggle > .icon:last-child { width: 12px; transition: transform 160ms ease; }
.sidebar-collection.open .sidebar-collection-toggle > .icon:last-child { transform: rotate(90deg); }
.sidebar-collection-toggle small {
  min-width: 19px;
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: var(--ap-radius-pill);
  color: var(--muted);
  font-size: var(--type-label);
  text-align: center;
}
.sidebar-collection-list { display: none; padding: 0 0 6px 4px; }
.sidebar-collection.open .sidebar-collection-list { display: block; }
.sidebar-collection-list > p { margin: 6px 8px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.sidebar-library-row {
  display: grid;
  min-height: 38px;
  grid-template-columns: minmax(0, 1fr) 28px;
  gap: 4px;
  align-items: center;
}
.sidebar-library-row > button:first-child,
.sidebar-library-row > span:first-child {
  display: grid;
  min-width: 0;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 7px;
  align-items: center;
  color: var(--muted-strong);
  font-size: var(--type-meta);
  text-align: left;
}
.sidebar-library-row > button:first-child > span:last-child,
.sidebar-library-row > span:first-child > span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-library-row .space-monogram { width: 24px; height: 24px; }
.sidebar-library-row > .icon-button { width: 26px; height: 26px; }
.class-trash-row > span:first-child > .icon { width: 13px; margin-left: 5px; }

.space-cover.has-photo::before {
  background: var(--space-cover-color, var(--action-start));
  opacity: var(--space-cover-opacity, .72);
}
.space-card.has-photo {
  background-image: var(--space-cover-image);
}
.space-card.has-photo::before {
  position: absolute;
  z-index: 0;
  inset: 0;
  background: var(--space-cover-color, var(--action-start));
  content: "";
  opacity: var(--space-cover-opacity, .72);
  pointer-events: none;
}
.space-card.has-photo > * { position: relative; z-index: 1; }
.space-card.has-photo::after { z-index: 2; }
.space-cover.has-photo .space-cover-copy { text-shadow: 0 1px 20px rgba(0, 0, 0, .28); }

.archived-notice { margin-top: 24px; padding: 12px 14px; border: 1px solid color-mix(in srgb, var(--blue) 30%, var(--line)); background: var(--accent-soft); color: var(--muted-strong); font-size: var(--type-meta); line-height: var(--leading-body); }

.class-list-heading { gap: 20px; }
.class-list-actions { display: flex; gap: 8px; align-items: center; }
.class-filter {
  display: grid;
  width: min(270px, 32vw);
  min-height: 34px;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 7px;
  align-items: center;
  padding: 0 9px;
  border: 1px solid var(--line);
  background: var(--surface);
}
.class-filter:focus-within { border-color: var(--blue); }
.class-filter .icon { width: 13px; color: var(--muted); }
.class-filter input { min-width: 0; border: 0; background: transparent; outline: 0; font-size: var(--type-ui); }
.class-table-row[hidden] { display: none; }
.class-filter-empty { padding: 26px; border: 1px solid var(--line); border-top: 0; color: var(--muted); font-size: var(--type-body); line-height: var(--leading-body); text-align: center; }

.class-blocks-disclosure { margin-top: 22px; border: 1px solid var(--line); background: var(--surface); }
.class-blocks-disclosure > summary {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  cursor: pointer;
  list-style: none;
}
.class-blocks-disclosure > summary::-webkit-details-marker { display: none; }
.class-blocks-disclosure > summary > span { display: flex; gap: 10px; align-items: center; }
.class-blocks-disclosure > summary .icon { width: 15px; color: var(--blue); }
.class-blocks-disclosure > summary > .icon { color: var(--muted); transition: transform 160ms ease; }
.class-blocks-disclosure[open] > summary > .icon { transform: rotate(90deg); }
.class-blocks-disclosure > summary strong,
.class-blocks-disclosure > summary small { display: block; }
.class-blocks-disclosure > summary strong { font-size: var(--type-ui); font-weight: 620; line-height: 1.25; }
.class-blocks-disclosure > summary small { margin-top: 3px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.class-blocks-disclosure .class-blocks { padding: 18px; border-top: 1px solid var(--line); }
.class-blocks-disclosure .block-row { grid-template-columns: 38px minmax(0, 1fr); }

.document-page { display: block; min-height: calc(100vh - var(--topbar-height)); background: var(--bg); }
.document-page .editor-shell { width: 100%; min-width: 0; }
.editor-title { display: flex; min-width: 0; gap: 10px; align-items: center; }
.editor-title > span { min-width: 0; }
.editor-title p,
.editor-title strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.document-page .paper-sheet { width: min(920px, calc(100% - 64px)); }
.document-page .note-index { width: min(920px, calc(100% - 64px)); margin-inline: auto; }
.editor-toolbar { flex-wrap: wrap; }

.customization-section { display: grid; gap: 12px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.customization-section h3 { margin-top: 3px; font-size: var(--type-subtitle); font-weight: 580; letter-spacing: -.015em; }
.icon-upload { grid-template-columns: 92px minmax(0, 1fr); }
.icon-upload .cover-upload-preview { min-height: 82px; background-repeat: no-repeat; background-size: cover; }
.preview-monogram { width: 42px; height: 42px; }
.range-field { display: grid; gap: 10px; }
.range-field > span { display: flex; align-items: center; justify-content: space-between; color: var(--muted-strong); font-size: var(--type-meta); }
.range-field output { color: var(--blue); font-variant-numeric: tabular-nums; }
.range-field input { width: 100%; accent-color: var(--blue); }
.danger-text-button { display: inline-flex; min-height: 32px; gap: 7px; align-items: center; justify-content: center; color: var(--danger); font-size: var(--type-meta); }
.danger-text-button .icon { width: 13px; }
.danger-button { min-height: 36px; padding: 0 14px; background: var(--danger-solid); color: var(--on-danger); font-size: var(--type-meta); }
.confirm-dialog { display: grid; gap: 14px; }
.confirm-dialog > p { margin: 0; color: var(--muted-strong); line-height: 1.55; }
.confirm-icon { display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid var(--line); }
.confirm-icon.danger { border-color: color-mix(in srgb, var(--danger) 38%, var(--line)); background: var(--danger-soft); color: var(--danger); }
.confirm-icon .icon { width: 18px; }
.structure-modal > p { max-width: 68ch; margin: 0 0 16px; color: var(--muted); font-size: var(--type-body); line-height: var(--leading-body); }

/* V9 — compact space menu and custom photographic overlay. */
.cover-actions {
  position: absolute;
  z-index: 4;
  top: 18px;
  right: 18px;
  display: block;
  width: auto;
  align-self: auto;
}
.space-actions-menu { position: relative; }
.space-actions-menu > summary {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid var(--cover-line);
  background: var(--cover-glass);
  color: var(--on-cover);
  cursor: pointer;
  list-style: none;
  backdrop-filter: blur(12px);
}
.space-actions-menu > summary::-webkit-details-marker { display: none; }
.space-actions-menu > summary:hover,
.space-actions-menu[open] > summary { background: var(--cover-glass-hover); }
.space-actions-menu > summary .icon { width: 18px; }
.space-actions-panel {
  position: absolute;
  top: calc(100% + 7px);
  right: 0;
  display: grid;
  width: 220px;
  padding: 5px;
  border: 1px solid var(--glass-line);
  background: var(--glass-surface-strong);
  box-shadow: var(--glass-shadow);
  color: var(--ink);
  backdrop-filter: blur(16px) saturate(120%);
}
.space-actions-panel button {
  display: grid;
  min-height: 38px;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 9px;
  align-items: center;
  padding: 0 10px;
  color: var(--muted-strong);
  font-size: var(--type-meta);
  text-align: left;
}
.space-actions-panel button:hover { background: var(--accent-soft); color: var(--blue); }
.space-actions-panel button .icon { width: 13px; }
.space-actions-panel button.danger { margin-top: 4px; border-top: 1px solid var(--line); color: var(--danger); }
.space-actions-panel button.danger:hover { background: var(--danger-soft); color: var(--danger); }

.cover-layer-controls {
  display: grid;
  grid-template-columns: minmax(150px, .38fr) minmax(220px, 1fr);
  gap: 12px;
  align-items: stretch;
}
.color-field {
  display: flex;
  min-height: 58px;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 9px 10px;
  border: 1px solid var(--line);
  background: var(--surface);
}
.color-field strong,
.color-field small { display: block; }
.color-field strong { color: var(--muted-strong); font-size: var(--type-ui); line-height: 1.25; }
.color-field small { margin-top: 3px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.color-field input[type="color"] {
  width: 46px;
  height: 34px;
  padding: 2px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
}
.cover-layer-controls .range-field { min-height: 58px; padding: 9px 10px; border: 1px solid var(--line); background: var(--surface); }

/* V7 — one collapsible hierarchy: subject → class → block. */
.space-folder-list { gap: 2px; margin-left: 28px; padding-left: 8px; }
.sidebar-class-tree { min-width: 0; }
.sidebar-class-row {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) 22px;
  gap: 2px;
  align-items: center;
}
.sidebar-class-row.active { background: color-mix(in srgb, var(--blue) 5%, var(--surface)); box-shadow: inset 2px 0 var(--blue); }
.sidebar-class-main {
  display: grid;
  min-width: 0;
  min-height: 34px;
  grid-template-columns: 15px minmax(0, 1fr);
  gap: 7px;
  align-items: center;
  padding: 5px 6px;
  color: var(--muted-strong);
  text-align: left;
}
.sidebar-class-main > .icon { width: 12px; color: var(--muted); }
.sidebar-class-main > span { min-width: 0; }
.sidebar-class-main strong,
.sidebar-class-main small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-class-main strong { font-size: var(--type-ui); font-weight: 580; line-height: 1.25; }
.sidebar-class-main small { margin-top: 2px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.sidebar-class-main:hover { color: var(--blue); }
.sidebar-class-chevron {
  display: grid;
  width: 22px;
  height: 26px;
  place-items: center;
  color: var(--muted);
  transition: color 150ms ease, transform 160ms ease;
}
.sidebar-class-chevron:hover { color: var(--blue); }
.sidebar-class-chevron .icon { width: 11px; }
.sidebar-class-tree.open .sidebar-class-chevron { transform: rotate(90deg); }
.sidebar-class-tree:not(.open) .space-block-list { display: none; }
.sidebar-class-tree .space-block-list {
  display: grid;
  gap: 1px;
  margin: 1px 0 4px 15px;
  padding-left: 7px;
  border-left: 1px solid color-mix(in srgb, var(--violet) 34%, var(--line));
}
.sidebar-class-tree .space-block-link {
  display: grid;
  min-width: 0;
  min-height: 28px;
  grid-template-columns: 13px minmax(0, 1fr);
  gap: 6px;
  align-items: center;
  padding: 4px 5px;
  color: var(--muted);
  font-size: var(--type-meta);
  text-align: left;
}
.sidebar-class-tree .space-block-link span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.section-note { max-width: 68ch; margin-top: 5px; color: var(--muted); font-size: var(--type-body); line-height: var(--leading-body); }
.empty-focus-card .focus-content h2 { max-width: 30ch; font-size: var(--type-subtitle); line-height: 1.25; }
.panel-empty-copy { max-width: 68ch; margin: 0; padding: 26px 18px; color: var(--muted); font-size: var(--type-body); line-height: var(--leading-body); }
.class-disclosure-list { border: 1px solid var(--line); background: var(--surface); }
.space-class-disclosure { border-bottom: 1px solid var(--line); }
.space-class-disclosure:last-child { border-bottom: 0; }
.space-class-disclosure > summary {
  display: grid;
  min-height: 74px;
  grid-template-columns: minmax(260px, 1.35fr) minmax(130px, .5fr) minmax(80px, .3fr) 24px;
  gap: 18px;
  align-items: center;
  padding: 0 18px;
  cursor: pointer;
  list-style: none;
}
.space-class-disclosure > summary::-webkit-details-marker { display: none; }
.space-class-disclosure > summary:hover { background: color-mix(in srgb, var(--blue) 4%, var(--surface)); }
.space-class-identity { display: grid; min-width: 0; grid-template-columns: 28px minmax(0, 1fr); gap: 11px; align-items: center; }
.space-class-identity > span { min-width: 0; }
.space-class-identity strong,
.space-class-identity small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.space-class-identity strong { color: var(--ink); font-size: var(--type-ui); font-weight: 590; line-height: 1.25; }
.space-class-identity small { margin-top: 3px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.space-class-status { display: flex; gap: 7px; align-items: center; color: var(--muted-strong); font-size: var(--type-meta); }
.space-class-count { color: var(--muted); font-size: var(--type-meta); }
.space-class-chevron { display: grid; place-items: center; color: var(--muted); transition: transform 160ms ease; }
.space-class-chevron .icon { width: 14px; }
.space-class-disclosure[open] .space-class-chevron { transform: rotate(90deg); }
.space-class-content { padding: 18px; border-top: 1px solid var(--line); background: var(--surface-soft); }
.space-class-content-head { display: flex; gap: 18px; align-items: center; justify-content: space-between; margin-bottom: 13px; }
.space-class-content-head h3 { margin-top: 3px; font-size: var(--type-subtitle); font-weight: 580; letter-spacing: -.015em; }
.space-class-content-head .secondary-button .icon { width: 12px; }
.space-class-blocks { display: grid; border: 1px solid var(--line); background: var(--surface); }
.space-class-blocks > button {
  display: grid;
  min-height: 52px;
  grid-template-columns: 34px minmax(0, 1fr) 18px;
  gap: 10px;
  align-items: center;
  padding: 7px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--muted-strong);
  text-align: left;
}
.space-class-blocks > button:last-child { border-bottom: 0; }
.space-class-blocks > button:hover { background: color-mix(in srgb, var(--violet) 4%, var(--surface)); }
.space-class-blocks > button > span:first-child { color: var(--blue); font-size: var(--type-label); font-variant-numeric: tabular-nums; }
.space-class-blocks strong,
.space-class-blocks small { display: block; }
.space-class-blocks strong { color: var(--ink); font-size: var(--type-ui); font-weight: 580; line-height: 1.25; }
.space-class-blocks small { margin-top: 3px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.space-class-blocks .icon { width: 12px; color: var(--muted); }

@media (max-width: 980px) {
  .app-shell,
  .app-shell.sidebar-collapsed { grid-template-columns: minmax(0, 1fr); }
  .sidebar,
  .app-shell.sidebar-collapsed .sidebar { visibility: visible; width: min(310px, 88vw); transform: translateX(-105%); }
  .sidebar.open,
  .app-shell.sidebar-collapsed .sidebar.open { transform: translateX(0); }
  .sidebar-collapse,
  .sidebar-resizer { display: none; }
  .menu-button,
  .app-shell.sidebar-collapsed .menu-button { display: grid; }
  .document-page .paper-sheet,
  .document-page .note-index { width: min(920px, calc(100% - 36px)); }
}

@media (max-width: 760px) {
  .class-list-heading { align-items: stretch; }
  .class-list-actions { width: 100%; flex-direction: column; align-items: stretch; }
  .class-filter { width: 100%; }
  .editor-header { min-height: 96px; gap: 8px; align-items: flex-start; padding-block: 10px; }
  .editor-header > div:last-child { flex-wrap: wrap; justify-content: flex-end; }
  .document-page .paper-sheet { width: calc(100% - 20px); margin-top: 10px; padding: 34px 24px; }
  .cover-actions { top: 12px; right: 12px; }
  .cover-layer-controls { grid-template-columns: 1fr; }
  .space-class-disclosure > summary { min-height: 68px; grid-template-columns: minmax(0, 1fr) 22px; gap: 10px; padding: 0 12px; }
  .space-class-status,
  .space-class-count { grid-column: 1; padding-left: 39px; }
  .space-class-chevron { grid-row: 1 / 4; grid-column: 2; }
  .space-class-content { padding: 12px; }
  .space-class-content-head { align-items: flex-start; flex-direction: column; }
}

/* V9 — independent time statistics and academic record. */
.tools-nav { padding-block: 10px; }
.grades-page-heading { min-height: 250px; }
.grades-page .grades-section { margin-top: 14px; }
.grade-scope-switch { margin-top: 20px; }
.grades-section {
  margin: 14px 0;
  overflow: hidden;
  padding: 0;
}
.grades-heading {
  display: flex;
  gap: 24px;
  align-items: end;
  justify-content: space-between;
  padding: 23px 24px 20px;
  border-bottom: 1px solid var(--line);
}
.grades-heading h2,
.grades-heading p { margin: 0; }
.grades-heading h2 { margin-top: 5px; font-size: var(--type-title); font-weight: 560; letter-spacing: -.025em; }
.grades-heading div > p:last-child { max-width: 62ch; margin-top: 7px; color: var(--muted); font-size: var(--type-body); line-height: var(--leading-body); }
.grade-space-list { display: grid; }
.grade-space-row {
  display: grid;
  min-height: 78px;
  grid-template-columns: minmax(220px, 1.4fr) minmax(150px, .55fr) minmax(130px, .55fr) 18px;
  gap: 18px;
  align-items: center;
  padding: 11px 22px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  transition: background 150ms ease;
}
.grade-space-row:hover { background: color-mix(in srgb, var(--blue) 4%, var(--surface)); }
.grade-space-row:last-child { border-bottom: 0; }
.grade-space-row > .icon { width: 13px; color: var(--muted); }
.grade-space-identity { display: grid; min-width: 0; grid-template-columns: 34px minmax(0, 1fr); gap: 12px; align-items: center; }
.grade-space-identity > span:last-child { min-width: 0; }
.grade-space-identity strong,
.grade-space-identity small,
.grade-space-result strong,
.grade-space-result small { display: block; }
.grade-space-identity strong { overflow: hidden; color: var(--ink); font-size: var(--type-ui); font-weight: 590; text-overflow: ellipsis; white-space: nowrap; }
.grade-space-identity small,
.grade-space-result small { margin-top: 4px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.grade-space-result strong { color: var(--ink); font-size: var(--type-subtitle); font-weight: 560; letter-spacing: -.015em; font-variant-numeric: tabular-nums; }
.grade-space-progress,
.grade-coverage-track { display: block; height: 3px; overflow: hidden; background: var(--surface-strong); }
.grade-space-progress i,
.grade-coverage-track i { display: block; height: 100%; background: linear-gradient(90deg, var(--blue), var(--violet)); }
.grades-footnote { margin: 0; padding: 11px 22px; border-top: 1px solid var(--line); background: var(--surface-soft); color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-body); }
.grade-summary-grid { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--line); }
.grade-summary-grid article { min-height: 156px; padding: 24px; }
.grade-summary-grid article + article { border-left: 1px solid var(--line); }
.grade-summary-grid span { color: var(--muted-strong); font-size: var(--type-label); font-weight: 650; text-transform: uppercase; letter-spacing: .06em; }
.grade-summary-grid strong { display: block; margin-top: 12px; color: var(--ink); font-size: var(--type-metric); font-weight: 520; line-height: 1; letter-spacing: -.04em; font-variant-numeric: tabular-nums; }
.grade-summary-grid p { min-height: 28px; max-width: 62ch; margin: 10px 0 15px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-body); }
.grade-entry-list { display: grid; }
.grade-entry-row {
  display: grid;
  min-height: 70px;
  grid-template-columns: minmax(220px, 1fr) minmax(130px, .4fr) minmax(110px, .32fr) 34px;
  gap: 18px;
  align-items: center;
  padding: 10px 18px 10px 24px;
  border-bottom: 1px solid var(--line);
}
.grade-entry-row:last-child { border-bottom: 0; }
.grade-entry-row > div > strong,
.grade-entry-row > div > small,
.grade-entry-score strong,
.grade-entry-score small,
.grade-entry-weight strong,
.grade-entry-weight small { display: block; }
.grade-entry-row > div > strong { color: var(--ink); font-size: var(--type-ui); font-weight: 590; }
.grade-entry-row small { margin-top: 4px; color: var(--muted); font-size: var(--type-meta); line-height: var(--leading-label); }
.grade-entry-score strong,
.grade-entry-weight strong { color: var(--muted-strong); font-size: var(--type-ui); font-weight: 590; font-variant-numeric: tabular-nums; }
.grade-entry-edit { width: 32px; height: 32px; color: var(--muted); }
.grade-entry-edit:hover { color: var(--blue); }
.grade-entry-edit .icon { width: 13px; }
.grade-empty { margin: 0; padding: 28px 24px; color: var(--muted); font-size: var(--type-body); line-height: var(--leading-body); }
.grade-empty strong { display: block; color: var(--ink); font-size: var(--type-reading); font-weight: 580; }
.grade-empty p { margin: 6px 0 0; }
.grade-form-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.input-suffix { position: relative; display: block; }
.input-suffix input { padding-right: 34px; }
.input-suffix i { position: absolute; top: 50%; right: 13px; color: var(--muted); font-size: var(--type-meta); font-style: normal; transform: translateY(-50%); }
.grade-form-note { padding: 13px 14px; border-left: 2px solid var(--blue); background: color-mix(in srgb, var(--blue) 4%, var(--surface)); }
.grade-form-note strong { color: var(--blue); font-size: var(--type-ui); }
.grade-form-note p { max-width: 68ch; margin: 5px 0 0; color: var(--muted); font-size: var(--type-body); line-height: var(--leading-body); }
.modal-action-spacer { flex: 1; }

@media (max-width: 760px) {
  .grades-heading { align-items: stretch; flex-direction: column; }
  .grades-heading .secondary-button { width: 100%; }
  .grade-space-row { grid-template-columns: minmax(0, 1fr) auto 14px; gap: 10px; padding-inline: 15px; }
  .grade-space-progress { grid-row: 2; grid-column: 1 / 3; }
  .grade-space-row > .icon { grid-row: 1 / 3; grid-column: 3; }
  .grade-summary-grid { grid-template-columns: 1fr; }
  .grade-summary-grid article + article { border-top: 1px solid var(--line); border-left: 0; }
  .grade-entry-row { grid-template-columns: minmax(0, 1fr) 32px; gap: 10px; padding-inline: 15px; }
  .grade-entry-score,
  .grade-entry-weight { grid-column: 1; }
  .grade-entry-edit { grid-row: 1 / 4; grid-column: 2; }
  .grade-form-grid { grid-template-columns: 1fr; }
  .modal-action-spacer { display: none; }
}

/* ================================================================
   V10 — adaptive shell, touch ergonomics and continuous reading
   ================================================================ */

html,
body {
  min-width: 0;
  max-width: 100%;
  overflow-x: hidden;
}

body.mobile-nav-open { overflow: hidden; }

.app-body,
.main-content,
.page,
.editor-shell { min-width: 0; }

button,
summary,
select,
input,
textarea { touch-action: manipulation; }

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .topbar,
  .editor-toolbar { background: var(--surface); }
  .modal,
  .space-actions-panel,
  .toast { background: var(--surface-strong); }
}

@media (max-width: 1180px) {
  :root { --page-gutter: clamp(22px, 3.2vw, 38px); }
  .dashboard-feature-grid { grid-template-columns: minmax(0, 1.35fr) minmax(240px, .65fr); }
  .focus-card { grid-column: 1 / -1; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .class-intro { gap: 34px; }
}

@media (max-width: 980px) {
  :root {
    --page-gutter: clamp(20px, 4vw, 32px);
    --topbar-height: calc(64px + env(safe-area-inset-top));
  }

  .app-shell,
  .app-shell.sidebar-collapsed { display: block; grid-template-columns: minmax(0, 1fr); }

  .sidebar,
  .app-shell.sidebar-collapsed .sidebar {
    position: fixed;
    z-index: var(--ap-z-overlay);
    top: 0;
    bottom: 0;
    left: 0;
    width: min(340px, calc(100vw - 24px));
    height: 100dvh;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    visibility: hidden;
    pointer-events: none;
    background: var(--glass-surface-strong);
    box-shadow: var(--glass-shadow);
    transform: translateX(-104%);
    transition: transform 220ms cubic-bezier(.2, .8, .2, 1), visibility 220ms;
    backdrop-filter: blur(24px) saturate(122%);
  }

  .sidebar.open,
  .app-shell.sidebar-collapsed .sidebar.open {
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0);
  }

  .sidebar-scrim {
    position: fixed;
    z-index: var(--ap-z-scrim);
    inset: 0;
    display: block;
    background: var(--overlay-scrim);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease;
  }

  .sidebar-scrim.visible { opacity: 1; pointer-events: auto; }
  .sidebar-collapse,
  .sidebar-resizer { display: none; }
  .sidebar-close { display: grid; }

  .topbar {
    min-height: var(--topbar-height);
    grid-template-columns: 44px 88px minmax(150px, 1fr) auto;
    gap: 8px;
    padding: env(safe-area-inset-top) max(14px, env(safe-area-inset-right)) 0 max(14px, env(safe-area-inset-left));
  }

  .menu-button,
  .app-shell.sidebar-collapsed .menu-button { display: grid; grid-column: 1; width: 44px; height: 44px; }
  .history-controls { grid-column: 2; }
  .history-controls .icon-button { width: 44px; height: 44px; }
  .topbar-actions { grid-column: 4; gap: 6px; }
  .search-trigger { display: none; }
  .timer-control,
  .theme-button,
  .top-add { min-height: 42px; }

  .page { padding-bottom: max(64px, calc(44px + env(safe-area-inset-bottom))); }
  .dashboard-feature-grid,
  .spaces-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .class-intro,
  .class-layout { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .document-page .paper-sheet,
  .document-page .note-index { width: min(920px, calc(100% - 36px)); }
}

@media (max-width: 760px) {
  :root {
    --page-gutter: 14px;
    --topbar-height: calc(64px + env(safe-area-inset-top));
    --type-reading: 16px;
  }

  .topbar {
    min-height: var(--topbar-height);
    grid-template-columns: 44px 88px minmax(0, 1fr);
    grid-template-rows: 52px 48px;
    gap: 0 8px;
    padding: env(safe-area-inset-top) max(10px, env(safe-area-inset-right)) 8px max(10px, env(safe-area-inset-left));
  }

  .menu-button { grid-row: 1; grid-column: 1; }
  .history-controls { grid-row: 1; grid-column: 2; }
  .topbar-actions { grid-row: 1; grid-column: 3; align-self: center; }
  .search-trigger,
  .theme-button { display: none; }
  .timer-control { min-width: 84px; min-height: 44px; padding-inline: 8px; }
  .timer-control small { display: none; }
  .top-add { display: grid; width: 44px; min-width: 44px; min-height: 44px; padding: 0; place-items: center; }
  .top-add span { display: none; }

  .page { padding-bottom: max(56px, calc(40px + env(safe-area-inset-bottom))); }
  .standard-heading,
  .grades-page-heading { min-height: 0; grid-template-columns: 1fr; gap: 20px; padding: 36px 0 28px; }
  .standard-heading h1,
  .dashboard-intro h1,
  .class-title-block h1,
  .space-cover h1 { max-width: 100%; font-size: clamp(34px, 11vw, 48px); line-height: 1.02; }
  .lead { max-width: 65ch; margin-top: 16px; font-size: var(--ap-text-body); }
  .dashboard-intro { min-height: 0; padding: 38px 0 28px; }
  .dashboard-intro::after { display: none; }
  .dashboard-feature-grid,
  .spaces-grid,
  .metric-grid { grid-template-columns: 1fr; }
  .space-card { min-height: 138px; }

  .space-cover {
    min-height: clamp(310px, 66vh, 420px);
    grid-template-columns: 1fr;
    align-content: end;
    gap: 22px;
    padding: 54px 18px 28px;
  }
  .space-cover-copy { max-width: calc(100% - 4px); }
  .cover-actions { top: 12px; right: 12px; width: auto; }
  .space-actions-panel { width: min(260px, calc(100vw - 28px)); }
  .class-intro { gap: 26px; padding-bottom: 28px; }
  .class-title-block { padding-top: 18px; }
  .class-list-heading { align-items: stretch; }
  .class-list-actions { width: 100%; flex-direction: column; align-items: stretch; }
  .class-filter { width: 100%; min-height: 44px; }
  .class-filter input { font-size: var(--ap-text-body); }
  .class-table-head { display: none; }
  .class-table-row { grid-template-columns: minmax(0, 1fr) 32px; gap: 10px; padding: 14px; }
  .class-table-row > span:nth-child(2),
  .class-table-row > span:nth-child(3) { grid-column: 1; padding-left: 40px; }
  .class-table-row > span:last-child { grid-row: 1 / 4; grid-column: 2; }
  .space-class-disclosure > summary { min-height: 78px; grid-template-columns: minmax(0, 1fr) 32px; gap: 10px; padding: 10px 12px; }
  .space-class-status,
  .space-class-count { grid-column: 1; padding-left: 39px; }
  .space-class-chevron { grid-row: 1 / 4; grid-column: 2; }
  .space-class-content { padding: 12px; }
  .space-class-content-head { align-items: stretch; flex-direction: column; }
  .space-class-content-head .secondary-button { width: 100%; }

  .stats-heading { align-items: stretch; }
  .period-switch { width: 100%; }
  .period-switch button { min-height: 44px; flex: 1; }
  .stats-scope-switch {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 2px 2px 9px;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
  }
  .stats-scope-switch::-webkit-scrollbar { display: none; }
  .stats-scope-switch > button { min-width: min(190px, 72vw); min-height: 52px; flex: 0 0 auto; scroll-snap-align: start; }
  .stats-scope-switch > button:first-child { min-width: 74px; }
  .activity-chart { min-height: 250px; overflow-x: auto; overscroll-behavior-inline: contain; }
  .activity-chart.month { grid-template-columns: repeat(30, minmax(14px, 1fr)); gap: 3px; }
  .stats-context { grid-template-columns: 1fr; }
  .stats-context > .secondary-button { width: 100%; }

  .document-page { display: block; }
  .editor-header {
    display: grid;
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    align-items: stretch;
    padding: 12px 14px;
  }
  .editor-title { width: 100%; }
  .editor-title .icon-button { width: 44px; height: 44px; }
  .editor-header > div:last-child { width: 100%; gap: 8px; justify-content: flex-end; }
  .editor-header > div:last-child .secondary-button,
  .editor-header > div:last-child .primary-button { min-height: 44px; }
  .save-state { margin-right: auto; }
  .editor-toolbar {
    flex-wrap: nowrap;
    gap: 3px;
    overflow-x: auto;
    padding: 5px 10px;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
  }
  .editor-toolbar::-webkit-scrollbar { display: none; }
  .editor-toolbar button { min-width: 44px; min-height: 44px; flex: 0 0 auto; }
  .editor-toolbar > span { flex: 0 0 1px; }
  .editor-warning { width: calc(100% - 24px); margin-top: 12px; }
  .document-page .paper-sheet,
  .document-page .note-index {
    width: 100%;
    margin-inline: 0;
    border-right: 0;
    border-left: 0;
  }
  .document-page .paper-sheet { min-height: 72vh; margin-top: 10px; margin-bottom: 36px; padding: 34px 20px 52px; }
  .paper-sheet h1 { font-size: clamp(34px, 10vw, 48px); letter-spacing: -.04em; }
  .editable-note { min-height: 50vh; padding-top: 32px; font-size: var(--ap-text-body); line-height: 1.72; }

  .grades-heading { align-items: stretch; flex-direction: column; }
  .grades-heading .secondary-button { width: 100%; min-height: 44px; }
  .grade-space-row { grid-template-columns: minmax(0, 1fr) auto 24px; gap: 10px; padding: 14px; }
  .grade-space-progress { grid-row: 2; grid-column: 1 / 3; }
  .grade-space-row > .icon { grid-row: 1 / 3; grid-column: 3; }
  .grade-summary-grid,
  .grade-form-grid { grid-template-columns: 1fr; }
  .grade-summary-grid article + article { border-top: 1px solid var(--line); border-left: 0; }
  .grade-entry-row { grid-template-columns: minmax(0, 1fr) 44px; gap: 9px; padding: 14px; }
  .grade-entry-score,
  .grade-entry-weight { grid-column: 1; }
  .grade-entry-edit { grid-row: 1 / 4; grid-column: 2; width: 44px; height: 44px; }

  .modal[open] {
    position: fixed;
    inset: auto 0 0;
    width: 100%;
    max-width: none;
    max-height: calc(100dvh - max(16px, env(safe-area-inset-top)));
    margin: 0;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: var(--radius-overlay) var(--radius-overlay) 0 0;
    padding-bottom: env(safe-area-inset-bottom);
  }
  .modal-head { position: sticky; z-index: 2; top: 0; min-height: 76px; padding: 14px 16px; background: var(--glass-surface-strong); backdrop-filter: blur(18px) saturate(120%); }
  .modal-head .icon-button { width: 44px; height: 44px; }
  .modal-content { padding: 20px 16px 24px; }
  .field input,
  .field select,
  .search-field input { font-size: var(--ap-text-body); }
  .choice-field,
  .cover-choices { flex-wrap: wrap; }
  .upload-grid,
  .cover-layer-controls,
  .cover-upload,
  .icon-upload { grid-template-columns: 1fr; }
  .cover-upload-preview { min-height: 112px; }
  .modal-actions { flex-wrap: wrap; }
  .modal-actions button { min-height: 44px; }
  .toast { right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); left: 12px; max-width: none; }
}

@media (max-width: 420px) {
  .save-state { display: none; }
  .editor-header > div:last-child { justify-content: stretch; }
  .editor-header > div:last-child .secondary-button,
  .editor-header > div:last-child .primary-button { flex: 1; }
  .editor-header > div:last-child .secondary-button span { display: none; }
  .class-blocks-disclosure .class-blocks { padding: 12px; }
  .modal-actions { flex-direction: column-reverse; }
  .modal-actions button { width: 100%; }
}

@media (max-width: 980px) and (orientation: landscape) and (max-height: 560px) {
  :root { --topbar-height: calc(60px + env(safe-area-inset-top)); }
  .topbar {
    grid-template-columns: 44px 88px minmax(150px, 1fr) auto;
    grid-template-rows: 52px;
    gap: 8px;
    padding-bottom: 0;
  }
  .menu-button { grid-row: 1; grid-column: 1; }
  .history-controls { grid-row: 1; grid-column: 2; }
  .topbar-actions { grid-row: 1; grid-column: 4; }
  .sidebar,
  .app-shell.sidebar-collapsed .sidebar { width: min(320px, 72vw); }
  .standard-heading,
  .grades-page-heading { padding-block: 28px 22px; }
}

@media (pointer: coarse) {
  .sidebar-resizer { display: none; }
  .icon-button,
  .sidebar-close,
  .space-chevron,
  .sidebar-class-chevron { width: 44px; height: 44px; }
  .nav-link,
  .theme-row,
  .sidebar-collection-toggle,
  .space-main,
  .sidebar-class-main,
  .space-actions-panel button { min-height: 44px; }
  .editor-toolbar button { min-height: 44px; }
  .space-link { grid-template-columns: minmax(0, 1fr) 44px; }
  .sidebar-class-row { grid-template-columns: minmax(0, 1fr) 44px; }
}

@media (hover: none) {
  .space-card:hover { transform: none; }
  .space-card:hover::after { transform: scaleX(0); }
  button:active,
  summary:active { filter: brightness(.97); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .topbar,
  .editor-toolbar,
  .sidebar,
  .modal,
  .space-actions-panel,
  .toast {
    background: var(--surface-strong);
    backdrop-filter: none;
  }
}

@media print {
  @page { size: A4; margin: 16mm; }
  html,
  body { background: #fff !important; color: #111 !important; }
  .skip-link,
  .sidebar,
  .sidebar-scrim,
  .topbar,
  .editor-header,
  .editor-toolbar,
  .editor-warning,
  .note-index,
  .toast,
  .modal,
  /* Floating layers repeat on every printed page. */
  .bc-banner,
  .maintenance-banner,
  .motor-user-chip,
  .v2-upload-status,
  .app-scroll-progress,
  .bloop-coach,
  .bloop-bubble,
  .notes-search,
  #bloopy-tour { display: none !important; }
  .app-shell,
  .app-shell.sidebar-collapsed { display: block !important; }
  .app-body,
  .main-content,
  .document-page,
  .editor-shell { display: block !important; min-height: 0 !important; background: #fff !important; }
  .paper-sheet,
  .document-page .paper-sheet {
    width: auto !important;
    min-height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    border: 0 !important;
    box-shadow: none !important;
  }
  .paper-sheet h1 { color: #111 !important; font-size: 30pt !important; }
  .editable-note { color: #1b1b1a !important; font-size: 11pt !important; line-height: 1.55 !important; }
}