:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-soft: #f8fafc;
  --surface-strong: #e2e8f0;
  --sidebar: #f8fafc;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --text: #0f172a;
  --muted: #64748b;
  --muted-strong: #475569;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #dbeafe;
  --accent-line: #bfdbfe;
  --success: #059669;
  --success-soft: #d1fae5;
  --warning: #d97706;
  --warning-soft: #fef3c7;
  --danger: #e11d48;
  --danger-soft: #ffe4e6;
  --violet: #7c3aed;
  --violet-soft: #ede9fe;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.08);
  --shadow-blue: 0 14px 32px rgba(37, 99, 235, 0.22);
  --radius: 8px;
  --radius-lg: 8px;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #0f172a;
  --surface-raised: #1e293b;
  --surface-soft: #1e293b;
  --surface-strong: #334155;
  --sidebar: #1e293b;
  --line: #334155;
  --line-strong: #334155;
  --text: #f8fafc;
  --muted: #94a3b8;
  --muted-strong: #cbd5e1;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.18);
  --accent-line: rgba(59, 130, 246, 0.36);
  --success: #34d399;
  --success-soft: rgba(16, 185, 129, 0.18);
  --warning: #fbbf24;
  --warning-soft: rgba(245, 158, 11, 0.2);
  --danger: #fb7185;
  --danger-soft: rgba(244, 63, 94, 0.18);
  --violet: #a78bfa;
  --violet-soft: rgba(139, 92, 246, 0.18);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.22);
  --shadow-md: 0 18px 42px rgba(0, 0, 0, 0.28);
  --shadow-blue: 0 16px 34px rgba(37, 99, 235, 0.24);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-sans);
  background: var(--bg);
  overflow-x: hidden;
}

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

html.is-pdf-fullscreen,
body.is-pdf-fullscreen {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: none;
}

body.is-pdf-fullscreen .app-topbar {
  display: none;
}

body.is-pdf-fullscreen .app-main,
body.is-pdf-fullscreen .app-content {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  padding: 0;
}

body.is-pdf-fullscreen .page-stack {
  animation: none;
  transform: none;
}

body,
button,
input,
select,
textarea {
  letter-spacing: 0;
}

a {
  color: inherit;
}

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

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

[hidden] {
  display: none !important;
}

.icon {
  width: 1.1rem;
  height: 1.1rem;
  flex: 0 0 auto;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.app-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
  position: relative;
}

.app-sidebar-backdrop {
  display: none;
}

.app-sidebar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  flex: 0 0 260px;
  width: 260px;
  height: 100vh;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: var(--sidebar);
  transition: flex-basis 180ms ease, width 180ms ease;
}

.sidebar-brand {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
}

.sidebar-mobile-close.icon-button {
  display: none;
}

.brand-link {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  flex: 0 0 auto;
  border-radius: var(--radius);
  background: var(--accent);
  color: white;
  font-weight: 900;
  box-shadow: var(--shadow-blue);
}

.brand-mark .icon {
  width: 1.35rem;
  height: 1.35rem;
}

.brand-wordmark {
  overflow: hidden;
  font-size: 1.22rem;
  font-weight: 900;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.sidebar-nav,
.sidebar-footer {
  display: grid;
  gap: 0.45rem;
  padding: 0 1rem;
}

.sidebar-nav {
  flex: 0 0 auto;
}

.sidebar-footer {
  margin-top: auto;
  padding-bottom: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.sidebar-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.lang-toggle {
  display: inline-flex;
  min-height: 2.25rem;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 800;
}

.sidebar-user {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.75rem;
}

.sidebar-user__avatar {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 999px;
  background: linear-gradient(135deg, #3b82f6, #4f46e5);
  color: white;
  font-size: 0.72rem;
  font-weight: 900;
}

.sidebar-user__meta {
  display: grid;
  min-width: 0;
  gap: 0.1rem;
}

.sidebar-user__meta strong,
.sidebar-user__meta small {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.sidebar-user__meta strong {
  font-size: 0.88rem;
}

.sidebar-user__meta small {
  color: var(--muted);
  font-size: 0.64rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar-link {
  display: flex;
  min-height: 3rem;
  width: 100%;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 750;
  text-align: left;
  text-decoration: none;
  transition: background 160ms ease, color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.sidebar-link:hover {
  background: var(--surface-soft);
  color: var(--text);
}

.sidebar-link.is-active {
  background: var(--accent);
  color: white;
  box-shadow: var(--shadow-blue);
}

.sidebar-link--muted {
  cursor: default;
}

.sidebar-link--muted:hover {
  background: transparent;
  color: var(--muted);
}

.sidebar-link__text {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.icon-button {
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted-strong);
  cursor: pointer;
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease, transform 160ms ease;
}

.icon-button:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
}

.icon-button--ghost {
  width: 2rem;
  height: 2rem;
  border: 0;
  background: transparent;
}

.app-shell.is-sidebar-collapsed .app-sidebar {
  flex-basis: 88px;
  width: 88px;
}

.app-shell.is-sidebar-collapsed .brand-wordmark,
.app-shell.is-sidebar-collapsed .sidebar-link__text,
.app-shell.is-sidebar-collapsed .sidebar-user__meta {
  display: none;
}

.app-shell.is-sidebar-collapsed .sidebar-brand {
  position: relative;
  justify-content: center;
  padding-right: 1rem;
  padding-left: 1rem;
}

.app-shell.is-sidebar-collapsed .sidebar-collapse {
  position: absolute;
  top: 4.25rem;
  right: -1.15rem;
  display: grid;
  width: 2rem;
  height: 2rem;
  transform: rotate(180deg);
  box-shadow: var(--shadow-md);
}

.app-shell.is-sidebar-collapsed .sidebar-link {
  justify-content: center;
  padding-right: 0.75rem;
  padding-left: 0.75rem;
}

.app-shell.is-sidebar-collapsed .sidebar-footer {
  display: none;
}

.theme-icon--sun {
  display: none;
}

html[data-theme="dark"] .theme-icon--moon {
  display: none;
}

html[data-theme="dark"] .theme-icon--sun {
  display: block;
}

.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  flex: 1;
  overflow: hidden;
  background: var(--bg);
}

.app-topbar {
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 2rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  z-index: 10;
}

.topbar-heading {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.85rem;
}

.app-topbar h1 {
  margin: 0;
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 850;
}

.topbar-mobile-toggle {
  display: none;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.global-search {
  position: relative;
  display: flex;
  min-width: min(22rem, 38vw);
  align-items: center;
}

.global-search .icon {
  position: absolute;
  left: 0.9rem;
  color: #94a3b8;
}

.global-search input {
  width: 100%;
  min-height: 2.6rem;
  padding: 0.65rem 1rem 0.65rem 2.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text);
  outline: none;
}

.global-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.topbar-bell {
  position: relative;
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  color: var(--muted);
  text-decoration: none;
}

.topbar-bell:hover {
  color: var(--text);
}

.topbar-bell span {
  position: absolute;
  top: 0.58rem;
  right: 0.58rem;
  width: 0.5rem;
  height: 0.5rem;
  border: 2px solid var(--bg);
  border-radius: 999px;
  background: var(--danger);
}

.scroll-top-button {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 110;
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  color: var(--accent);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  transition: opacity 160ms ease, transform 160ms ease, background 160ms ease;
}

.scroll-top-button.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top-button:hover {
  background: var(--accent-soft);
}

.app-content {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
}

.app-main__inner {
  width: min(1280px, 100%);
  margin: 0 auto;
}

.app-main__inner--wide {
  width: min(1480px, 100%);
}

.page-stack {
  display: grid;
  gap: 1.25rem;
  animation: page-in 260ms ease both;
}

@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dashboard-header,
.page-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: flex-end;
}

.dashboard-header > *,
.page-header > * {
  min-width: 0;
}

.dashboard-header h2,
.page-header h2 {
  margin: 0.3rem 0 0;
  color: var(--text);
  font-size: clamp(1.85rem, 3vw, 2.8rem);
  line-height: 1.08;
  font-weight: 850;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.dashboard-header p,
.page-header p {
  max-width: 52rem;
  margin: 0.55rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.page-header--compact {
  align-items: center;
}

.page-header__eyebrow-row,
.page-header__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  width: fit-content;
  min-height: 1.7rem;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-heading,
.panel__header,
.module-card__header,
.resource-card__header,
.course-card__header,
.active-session__header,
.session-history-card__header,
.session-stat-card__header,
.resource-session-widget__header,
.review-card__header,
.page-status-panel__header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: flex-start;
}

.section-heading h3,
.panel__header h3,
.module-card__header h3,
.resource-card__header h4,
.course-card__header h4,
.active-session__header h4,
.session-history-card__header h4,
.session-stat-card__header h4,
.resource-session-widget__header h3,
.review-card__header h3,
.page-status-panel__header h4 {
  margin: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.section-heading p,
.panel__header p,
.module-card__header p,
.resource-card__description,
.course-card p,
.active-session__header p,
.session-history-card__header p,
.resource-session-widget__header p,
.review-card__header p,
.page-status-panel__header p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.2rem;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.stat-card,
.card,
.panel,
.module-card,
.resource-card,
.course-card,
.active-session,
.session-history-card,
.session-stat-card,
.page-status-panel,
.resource-session-widget,
.session-feedback-dialog__content {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.stat-card {
  display: grid;
  gap: 0.7rem;
  padding: 1.35rem;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.stat-card--featured {
  border-color: transparent;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: var(--shadow-blue);
}

.stat-card--featured strong,
.stat-card--featured span:last-child,
.stat-card--featured small {
  color: #ffffff;
}

.stat-card--featured .stat-card__icon {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.stat-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card__icon {
  display: inline-grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border-radius: var(--radius);
}

.stat-card__icon--blue {
  background: var(--accent-soft);
  color: var(--accent);
}

.stat-card__icon--violet {
  background: var(--violet-soft);
  color: var(--violet);
}

.stat-card__icon--amber {
  background: var(--warning-soft);
  color: var(--warning);
}

.stat-card__icon--emerald {
  background: var(--success-soft);
  color: var(--success);
}

.stat-card strong,
.kpi {
  margin: 0;
  color: var(--text);
  font-size: 2rem;
  line-height: 1;
  font-weight: 850;
}

.stat-card--featured strong,
.stat-card--featured span,
.stat-card--featured small {
  color: #ffffff;
}

.stat-card small {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
}

.stat-card span:last-child,
.card p,
.card li {
  color: var(--muted);
}

.card {
  padding: 1.2rem;
}

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1rem;
}

.card ul {
  margin: 0;
  padding-left: 1rem;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 1.25rem;
  align-items: start;
}

.dashboard-grid--lower {
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
}

.dashboard-main,
.dashboard-side {
  display: grid;
  gap: 1rem;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.course-card,
.resource-card {
  display: grid;
  gap: 0.95rem;
  padding: 1rem;
  color: var(--text);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.course-card:hover,
.resource-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.resource-card[data-resource-status="done"],
.resource-library-card[data-resource-status="done"] {
  border-color: rgba(5, 150, 105, 0.32);
  background: color-mix(in srgb, var(--success-soft) 72%, var(--surface));
}

.resource-card[data-resource-status="review"],
.resource-card[data-resource-status="hard"],
.resource-library-card[data-resource-status="review"],
.resource-library-card[data-resource-status="hard"] {
  border-color: rgba(225, 29, 72, 0.3);
  background: color-mix(in srgb, var(--danger-soft) 72%, var(--surface));
}

.course-card h4 {
  font-size: 1rem;
  line-height: 1.25;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.course-card--rich {
  position: relative;
  overflow: hidden;
}

.course-card__icon {
  display: inline-grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent);
}

.course-card__continue {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 850;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.course-card:hover .course-card__continue {
  opacity: 1;
  transform: translateY(0);
}

.course-card p {
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.study-session-card {
  position: relative;
  display: grid;
  gap: 1rem;
  overflow: hidden;
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, rgba(37, 99, 235, 0.95), rgba(15, 23, 42, 0.98)),
    var(--accent);
  color: white;
  box-shadow: var(--shadow-blue);
}

.top-resources-card .panel__header > .icon {
  color: var(--muted);
}

.resource-mini-list {
  display: grid;
  gap: 0.45rem;
}

.resource-mini {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem;
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: background 160ms ease;
}

.resource-mini:hover {
  background: var(--bg);
}

.resource-mini__icon {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  flex: 0 0 auto;
  color: #ef4444;
}

.resource-mini__body {
  display: grid;
  min-width: 0;
  gap: 0.15rem;
}

.resource-mini__body strong,
.resource-mini__body small {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.resource-mini__body strong {
  font-size: 0.82rem;
}

.resource-mini__body small {
  color: var(--muted);
  font-size: 0.72rem;
}

.library-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.library-summary article {
  display: grid;
  gap: 0.25rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.library-summary strong {
  font-size: 1.4rem;
}

.library-summary span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
}

.course-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.segmented-control {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.segmented-control__item {
  display: inline-flex;
  min-height: 2.35rem;
  align-items: center;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.segmented-control__item.is-active {
  background: var(--accent);
  color: white;
}

.course-toolbar__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 750;
}

.course-grid--catalog {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.course-card--empty {
  min-height: 18rem;
  place-items: center;
  border-style: dashed;
  color: var(--muted);
  cursor: pointer;
  text-align: center;
}

.modal-dialog {
  width: min(34rem, calc(100vw - 2rem));
  max-height: min(90vh, 44rem);
  padding: 0;
  border: 0;
  background: transparent;
}

.modal-dialog::backdrop {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(8px);
}

.modal-dialog__panel {
  display: grid;
  gap: 1.1rem;
  max-height: min(90vh, 44rem);
  overflow-y: auto;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.modal-dialog__header {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: flex-start;
}

.modal-dialog__header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.modal-dialog__header p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.modal-dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.resource-library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.resource-library-card {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--text);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.resource-library-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-2px);
}

.resource-library-card__icon {
  display: inline-grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  border-radius: var(--radius);
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.resource-library-card h3 {
  margin: 0;
  font-size: 1rem;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.resource-library-card p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.45;
}

html[data-theme="dark"] .study-session-card {
  background:
    linear-gradient(145deg, rgba(37, 99, 235, 0.96), rgba(29, 78, 216, 0.96)),
    var(--accent);
}

.study-session-card__header {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: center;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.study-session-card .status-badge {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.study-session-card__time {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: clamp(2.7rem, 6vw, 3.4rem);
  line-height: 1;
}

.study-session-card p {
  position: relative;
  z-index: 1;
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.55;
}

.study-session-card .button {
  position: relative;
  z-index: 1;
  width: fit-content;
  background: #ffffff;
  color: #0f172a;
}

.study-session-card .button--secondary {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.session-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.session-strip span {
  display: inline-flex;
  min-height: 1.8rem;
  align-items: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.8rem;
  font-weight: 750;
}

.grid,
.grid--wide {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.grid--wide {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  align-items: start;
}

.panel,
.module-card,
.active-session,
.session-history-card,
.session-stat-card,
.page-status-panel {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
}

.panel--tight {
  gap: 0.85rem;
}

.panel--danger {
  border-color: rgba(225, 29, 72, 0.26);
  background: color-mix(in srgb, var(--danger-soft) 58%, var(--surface));
}

.stack,
.modules-grid,
.review-list {
  display: grid;
  gap: 1rem;
}

.modules-grid {
  align-items: start;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.form-grid--compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
  display: grid;
  min-width: 0;
  gap: 0.35rem;
}

.field span,
.viewer-field span,
.session-metric__label,
.meta-list dt {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.field--full {
  grid-column: 1 / -1;
}

.input {
  width: 100%;
  min-height: 2.85rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.input--textarea {
  min-height: 6rem;
  resize: vertical;
}

.input--compact {
  min-height: 2.35rem;
  padding-top: 0.55rem;
  padding-bottom: 0.55rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.button {
  position: relative;
  display: inline-flex;
  min-height: 2.7rem;
  max-width: 100%;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.68rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--accent);
  color: white;
  cursor: pointer;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
  white-space: normal;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.18);
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 100ms ease, box-shadow 160ms ease;
}

.button:hover {
  background: var(--accent-hover);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.24);
}

.button:active {
  transform: scale(0.98);
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.button.is-loading {
  cursor: progress;
}

.button.is-loading::before,
.app-loading-overlay__spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 720ms linear infinite;
}

.button.is-loading::before {
  content: "";
  flex: 0 0 auto;
}

.button--secondary {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--text);
  box-shadow: none;
}

.button--secondary:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: none;
}

.button--danger {
  border-color: rgba(225, 29, 72, 0.28);
  background: var(--danger);
  color: white;
  box-shadow: 0 10px 24px rgba(225, 29, 72, 0.22);
}

.button--danger:hover {
  background: color-mix(in srgb, var(--danger) 88%, black);
  box-shadow: 0 14px 28px rgba(225, 29, 72, 0.28);
}

.button--small {
  min-height: 2.35rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
}

.banner {
  padding: 0.9rem 1rem;
  border: 1px solid rgba(5, 150, 105, 0.22);
  border-radius: var(--radius);
  background: var(--success-soft);
  color: var(--success);
  font-weight: 700;
}

.banner--error {
  border-color: rgba(225, 29, 72, 0.24);
  background: var(--danger-soft);
  color: var(--danger);
}

.app-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 320;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.18);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.app-loading-overlay__card {
  display: inline-flex;
  max-width: min(26rem, calc(100vw - 3rem));
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  box-shadow: var(--shadow-md);
  color: var(--text);
}

.app-loading-overlay__card strong {
  font-size: 0.95rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.pill {
  display: inline-flex;
  min-height: 2rem;
  align-items: center;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted-strong);
  font-size: 0.86rem;
  font-weight: 700;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.status-badge {
  display: inline-flex;
  min-height: 1.8rem;
  align-items: center;
  justify-content: center;
  padding: 0.32rem 0.65rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.status-badge--not_started,
.status-badge--completed {
  background: var(--surface-soft);
  color: var(--muted-strong);
}

.status-badge--in_progress,
.status-badge--running {
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
}

.status-badge--done {
  border: 1px solid rgba(5, 150, 105, 0.22);
  background: var(--success-soft);
  color: var(--success);
}

.status-badge--review,
.status-badge--medium,
.status-badge--paused {
  border: 1px solid rgba(217, 119, 6, 0.22);
  background: var(--warning-soft);
  color: var(--warning);
}

.status-badge--hard {
  border: 1px solid rgba(225, 29, 72, 0.22);
  background: var(--danger-soft);
  color: var(--danger);
}

.progress-summary {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.progress-summary--compact {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.progress-summary__header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: flex-start;
}

.progress-summary__header h4 {
  margin: 0;
  font-size: 0.98rem;
}

.progress-summary__header p {
  margin: 0.3rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.progress-summary__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.progress-meter {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 0.45rem;
  border-radius: 999px;
  background: var(--surface-strong);
}

.progress-meter__value {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
}

.progress-meter__value--success {
  background: var(--success);
}

.course-meta,
.resource-meta,
.resource-actions,
.review-card__eyebrows,
.review-card__meta,
.review-card__actions,
.session-history-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.resource-card__filename {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.empty-state {
  padding: 1rem;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--muted);
  line-height: 1.55;
}

.empty-state--inline {
  margin-top: 0.25rem;
}

.review-row {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  min-height: 4.3rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease;
}

.review-row:hover {
  border-color: var(--accent-line);
  background: var(--surface-soft);
}

.review-row__dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  background: var(--warning);
}

.review-row__dot--hard {
  background: var(--danger);
}

.review-row__dot--review {
  background: var(--warning);
}

.review-row__body {
  display: grid;
  min-width: 0;
  gap: 0.18rem;
  flex: 1;
}

.review-row__body strong,
.review-row__body small {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.review-row__body small {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
  text-transform: uppercase;
}

.review-row__chevron {
  color: var(--muted);
}

.outline-block {
  display: grid;
  gap: 0.5rem;
  padding-top: 0.35rem;
  border-top: 1px solid var(--line);
}

.outline-block h5 {
  margin: 0;
  font-size: 0.95rem;
}

.outline-tree {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding-left: 1.25rem;
}

.outline-tree__item {
  display: grid;
  gap: 0.4rem;
}

.outline-preview {
  display: grid;
  gap: 0.75rem;
}

.outline-preview__checkbox {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.outline-preview__checkbox:not(:checked) ~ .outline-tree .outline-tree__item--collapsed {
  display: none;
}

.outline-preview__toggle {
  width: fit-content;
  cursor: pointer;
}

.outline-preview__toggle--less {
  display: none;
}

.outline-preview__checkbox:checked ~ .outline-preview__toggle--more {
  display: none;
}

.outline-preview__checkbox:checked ~ .outline-preview__toggle--less {
  display: inline-flex;
}

.outline-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.45rem 0.55rem;
  border-radius: var(--radius);
}

.outline-row[data-outline-status="done"] {
  background: color-mix(in srgb, var(--success-soft) 80%, transparent);
}

.outline-row[data-outline-status="review"],
.outline-row[data-outline-status="hard"] {
  background: color-mix(in srgb, var(--danger-soft) 80%, transparent);
}

.outline-row__link {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.35rem 0.45rem;
  margin: -0.35rem -0.45rem;
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
}

.outline-row__link:hover {
  background: var(--accent-soft);
}

.outline-row__title {
  font-weight: 800;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.outline-row__meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.session-panel {
  align-self: start;
}

.sessions-page {
  max-width: 1180px;
  margin: 0 auto;
}

.session-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.85fr);
  gap: 2rem;
  align-items: center;
}

.session-setup {
  display: grid;
  gap: 1.25rem;
}

.session-setup h3 {
  margin: 0;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  line-height: 1.05;
}

.session-setup p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.session-mode-grid {
  display: grid;
  gap: 0.8rem;
}

.session-mode-card {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.session-mode-card > span {
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--muted);
}

.session-mode-card div {
  display: grid;
  min-width: 0;
  gap: 0.15rem;
  flex: 1;
}

.session-mode-card strong {
  font-size: 0.95rem;
}

.session-mode-card small {
  color: var(--muted);
  line-height: 1.4;
}

.session-mode-card__check {
  opacity: 0;
  transition: opacity 160ms ease;
}

.session-mode-card--active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.session-mode-card--active > span {
  background: var(--accent);
  color: white;
}

.session-mode-card--active .session-mode-card__check {
  opacity: 1;
}

.session-start-form {
  padding-top: 0.5rem;
}

.session-form__hint {
  display: grid;
  gap: 0.35rem;
}

.session-form__hint span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.focus-timer-card {
  min-width: 0;
}

.focus-timer-card__inner {
  display: grid;
  gap: 1.25rem;
  justify-items: stretch;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  box-shadow: var(--shadow-md);
}

.focus-timer-card__inner--idle {
  justify-items: center;
  text-align: center;
}

.timer-orbit {
  position: relative;
  display: grid;
  width: min(16rem, 100%);
  aspect-ratio: 1;
  place-items: center;
  justify-self: center;
}

.timer-orbit svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer-orbit__track,
.timer-orbit__value {
  fill: transparent;
  stroke-width: 8;
}

.timer-orbit__track {
  stroke: var(--surface-strong);
}

.timer-orbit__value {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 691;
  stroke-dashoffset: 180;
  transition: stroke-dashoffset 240ms linear, stroke 180ms ease;
}

.timer-orbit__value--idle {
  stroke-dashoffset: 0;
}

.timer-orbit > div {
  position: absolute;
  display: grid;
  gap: 0.45rem;
  place-items: center;
}

.timer-orbit strong {
  font-family: var(--font-mono);
  font-size: clamp(2.35rem, 5vw, 3.5rem);
  line-height: 1;
}

.timer-orbit span {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.session-lower-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: 1.25rem;
  align-items: start;
}

.history-details {
  display: grid;
  gap: 1rem;
}

.history-details summary {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  list-style: none;
}

.history-details summary::-webkit-details-marker {
  display: none;
}

.history-details summary span:first-child {
  display: grid;
  gap: 0.25rem;
}

.history-details summary strong {
  font-size: 1rem;
}

.history-details summary small {
  color: var(--muted);
}

.history-details .stack {
  margin-top: 1rem;
}

.weekly-bars {
  display: flex;
  height: 14rem;
  align-items: end;
  justify-content: space-between;
  gap: 0.8rem;
}

.weekly-bar {
  display: grid;
  min-width: 0;
  height: 100%;
  gap: 0.45rem;
  flex: 1;
  align-items: end;
  text-align: center;
}

.weekly-bar__track {
  display: flex;
  height: 100%;
  align-items: end;
}

.weekly-bar__value {
  display: block;
  width: 100%;
  min-height: 0.45rem;
  border-radius: var(--radius) var(--radius) 0 0;
  background: rgba(37, 99, 235, 0.22);
  transition: background 160ms ease;
}

.weekly-bar:hover .weekly-bar__value {
  background: rgba(37, 99, 235, 0.45);
}

.weekly-bar strong {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 900;
}

.weekly-bar small {
  color: var(--muted);
  font-size: 0.62rem;
}

.active-session__metrics,
.resource-session-widget__metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
}

.session-metric {
  display: grid;
  gap: 0.3rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.session-metric__value {
  font-size: 1.05rem;
}

.session-focus,
.active-session__helper,
.session-form__hint p {
  color: var(--muted);
  line-height: 1.5;
}

.active-session__helper,
.session-form__hint p {
  margin: 0;
}

.kpi--small {
  font-size: 1.5rem;
}

.meta-list {
  display: grid;
  gap: 0.8rem;
  margin: 0;
}

.meta-list__row {
  display: grid;
  gap: 0.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line);
}

.meta-list__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.meta-list dd {
  margin: 0;
  font-weight: 800;
}

.resource-page {
  gap: 1.25rem;
}

.resource-viewer-layout {
  display: grid;
  --reader-sidebar-width: 360px;
  grid-template-columns: minmax(240px, var(--reader-sidebar-width)) 0.45rem minmax(0, 1fr);
  gap: 0;
  align-items: start;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.resource-sidebar,
.resource-main {
  display: grid;
  gap: 1rem;
}

.resource-sidebar {
  padding: 1rem;
  background: var(--surface-soft);
}

.reader-resizer {
  width: 0.45rem;
  min-height: 100%;
  background: var(--line);
  cursor: col-resize;
  transition: background 160ms ease;
}

.reader-resizer:hover,
body.is-resizing-reader .reader-resizer {
  background: var(--accent);
}

.resource-main {
  min-width: 0;
  padding: 1rem;
  background: var(--bg);
}

.resource-session-widget {
  position: fixed;
  top: 5rem;
  right: 1.25rem;
  left: auto;
  z-index: 120;
  display: grid;
  gap: 1rem;
  width: min(22rem, calc(100vw - 2rem));
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  padding: 1rem;
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-md);
}

.resource-session-widget.is-collapsed {
  width: min(14.5rem, calc(100vw - 2rem));
  gap: 0;
  padding: 0.75rem;
  cursor: grab;
}

.resource-session-widget__header {
  align-items: center;
}

.resource-session-widget__title {
  min-width: 0;
  cursor: grab;
}

.resource-session-widget__controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.resource-session-widget__body {
  display: grid;
  gap: 1rem;
}

.resource-session-widget__compact {
  display: none;
  width: 100%;
  min-height: 4.25rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent-soft) 72%, transparent);
  color: var(--text);
  cursor: grab;
  text-align: left;
}

.resource-session-widget__compact span {
  display: block;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.resource-session-widget__compact strong {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  line-height: 1.1;
}

.resource-session-widget.is-collapsed .resource-session-widget__header,
.resource-session-widget.is-collapsed .resource-session-widget__body {
  display: none;
}

.resource-session-widget.is-collapsed .resource-session-widget__compact {
  display: block;
}

.resource-session-widget.is-collapsed [data-session-widget-minimize] .icon {
  transform: rotate(180deg);
}

.resource-session-widget.is-dragging {
  cursor: grabbing;
  user-select: none;
}

.resource-session-widget.is-dragging .resource-session-widget__title {
  cursor: grabbing;
}

.resource-session-widget__banner {
  margin: 0;
}

.session-feedback-dialog {
  width: min(34rem, calc(100vw - 2rem));
  padding: 0;
  border: 0;
  background: transparent;
}

.session-feedback-dialog::backdrop {
  background: rgba(15, 23, 42, 0.46);
}

.session-feedback-dialog__content {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
}

.session-feedback-dialog__content h3 {
  margin: 0;
}

.session-feedback-dialog__content p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.session-feedback-dialog__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.resource-outline-panel {
  max-height: min(70vh, 42rem);
  min-height: 0;
  overflow: hidden;
}

.resource-outline-panel[open] {
  display: flex;
  flex-direction: column;
}

.resource-outline-panel__summary {
  flex: 0 0 auto;
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: flex-start;
  cursor: pointer;
  list-style: none;
}

.resource-outline-panel__summary::-webkit-details-marker {
  display: none;
}

.resource-outline-panel__summary h3 {
  margin: 0;
}

.resource-outline-panel__summary p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.resource-outline-panel__body {
  flex: 1 1 auto;
  min-height: 0;
  padding-top: 1rem;
  overflow-y: auto;
  overflow-x: hidden;
}

.status-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: flex-end;
}

.viewer-outline {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.viewer-outline .viewer-outline {
  padding-left: 1rem;
}

.viewer-outline__item {
  display: grid;
  gap: 0.5rem;
}

.viewer-outline__card {
  display: grid;
  gap: 0.75rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 160ms ease, background 160ms ease;
}

.viewer-outline__card:hover {
  border-color: var(--accent-line);
  background: var(--surface-soft);
}

.viewer-outline__card[data-outline-status="done"] {
  border-color: rgba(5, 150, 105, 0.28);
  background: color-mix(in srgb, var(--success-soft) 82%, var(--surface));
}

.viewer-outline__card[data-outline-status="review"],
.viewer-outline__card[data-outline-status="hard"] {
  border-color: rgba(225, 29, 72, 0.24);
  background: color-mix(in srgb, var(--danger-soft) 82%, var(--surface));
}

.resource-status-panel {
  gap: 0;
}

.resource-status-panel__summary {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  list-style: none;
}

.resource-status-panel__summary::-webkit-details-marker {
  display: none;
}

.resource-status-panel__summary span:first-child {
  display: grid;
  gap: 0.25rem;
}

.resource-status-panel__summary strong {
  font-size: 1rem;
}

.resource-status-panel__summary small {
  color: var(--muted);
  line-height: 1.45;
}

.resource-status-panel__body {
  display: grid;
  gap: 1rem;
  padding-top: 1rem;
}

.viewer-outline__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: flex-start;
}

.viewer-outline__link {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  gap: 0.55rem;
  justify-content: space-between;
  align-items: baseline;
  color: var(--text);
  font: inherit;
  text-align: left;
  text-decoration: none;
}

.viewer-outline__link--disabled {
  cursor: default;
  opacity: 0.72;
}

.viewer-outline__title {
  font-weight: 800;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.viewer-outline__meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.pdf-viewer {
  display: grid;
  gap: 1rem;
}

.pdf-viewer.is-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  overflow: hidden;
  padding: 0;
  background: var(--bg);
  overscroll-behavior: none;
  touch-action: none;
}

.pdf-viewer__toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: flex-end;
  padding: 0.85rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

.pdf-viewer__group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
}

.pdf-viewer__group--meta {
  align-items: center;
}

.viewer-field {
  display: grid;
  gap: 0.3rem;
}

.viewer-field--page {
  width: 5.8rem;
}

.viewer-field--zoom {
  width: 8rem;
}

.pdf-viewer__page-label,
.pdf-viewer__loading {
  color: var(--muted);
  font-size: 0.95rem;
}

.pdf-viewer__loading {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  justify-self: start;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: var(--shadow-sm);
}

.pdf-viewer__loading::before {
  content: "";
  width: 0.95rem;
  height: 0.95rem;
  border: 2px solid var(--accent);
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 720ms linear infinite;
}

.pdf-viewer__viewport {
  position: relative;
  min-height: 72vh;
  padding: 1rem;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(148, 163, 184, 0.14), rgba(100, 116, 139, 0.22)),
    var(--surface-soft);
}

.pdf-viewer__expand,
.pdf-viewer__close {
  position: absolute;
  z-index: 3;
  display: grid;
  width: 2.6rem;
  height: 2.6rem;
  place-items: center;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  color: var(--accent);
  cursor: pointer;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
  touch-action: manipulation;
}

.pdf-viewer__expand:hover,
.pdf-viewer__close:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.pdf-viewer__expand:active,
.pdf-viewer__close:active {
  transform: scale(0.96);
}

.pdf-viewer__expand {
  top: 2.25rem;
  right: 2.25rem;
}

.pdf-viewer__close {
  top: 0.9rem;
  right: 0.9rem;
  display: none;
}

.pdf-viewer__expand .icon,
.pdf-viewer__close .icon {
  width: 1.15rem;
  height: 1.15rem;
}

.pdf-viewer__canvas-wrap {
  display: flex;
  width: 100%;
  max-height: 78vh;
  justify-content: center;
  overflow: auto;
  overscroll-behavior: contain;
}

.pdf-viewer__page-surface {
  display: flex;
  width: max-content;
  min-width: 100%;
  justify-content: center;
  padding: 1rem;
  border-radius: var(--radius);
}

.pdf-viewer__canvas {
  display: block;
  max-width: none;
  height: auto;
  border-radius: 4px;
  background: #ffffff;
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.18);
}

.pdf-viewer__fullscreen-nav {
  display: none;
}

.pdf-viewer.is-fullscreen .pdf-viewer__toolbar,
.pdf-viewer.is-fullscreen .pdf-viewer__loading {
  display: none;
}

.pdf-viewer.is-fullscreen .pdf-viewer__viewport {
  min-height: 0;
  height: 100vh;
  height: 100dvh;
  padding: 0.5rem;
  border-radius: 0;
  background: var(--bg);
  overflow: hidden;
}

.pdf-viewer.is-fullscreen .pdf-viewer__canvas-wrap {
  height: 100%;
  max-height: none;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  overscroll-behavior: contain;
  overflow: hidden;
  touch-action: pinch-zoom;
  -webkit-overflow-scrolling: touch;
}

.pdf-viewer.is-fullscreen .pdf-viewer__page-surface {
  width: 100%;
  min-width: 0;
  padding: 0;
  align-items: center;
}

.pdf-viewer.is-fullscreen .pdf-viewer__canvas {
  max-width: calc(100vw - 2rem);
  max-height: calc(100vh - 5.5rem);
  max-height: calc(100dvh - 5.5rem);
  object-fit: contain;
  box-shadow: none;
}

.pdf-viewer.is-fullscreen .pdf-viewer__expand {
  display: none;
}

.pdf-viewer.is-fullscreen .pdf-viewer__close {
  position: fixed;
  z-index: 230;
  display: grid;
  width: 3rem;
  height: 3rem;
  top: calc(max(0.75rem, env(safe-area-inset-top)) + 0.1rem);
  right: calc(max(0.75rem, env(safe-area-inset-right)) + 0.1rem);
  border-color: color-mix(in srgb, var(--line-strong) 64%, transparent);
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  color: var(--text);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.24);
}

.pdf-viewer.is-fullscreen .pdf-viewer__fullscreen-nav {
  position: fixed;
  right: auto;
  bottom: calc(max(0.75rem, env(safe-area-inset-bottom)) + 0.1rem);
  left: 50%;
  z-index: 230;
  display: grid;
  width: min(20rem, calc(100vw - 4rem));
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.75rem;
  transform: translateX(-50%);
}

.pdf-viewer.is-fullscreen .pdf-viewer__fullscreen-nav .button {
  min-height: 2.15rem;
  padding: 0.55rem 0.8rem;
  border-color: var(--accent-line);
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  color: var(--text);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
  touch-action: manipulation;
}

.review-filters {
  align-items: end;
}

.review-card {
  gap: 0.9rem;
}

.review-card--queue {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.review-card--queue:hover {
  border-color: var(--warning);
  transform: translateY(-1px);
}

.review-card__icon {
  display: inline-grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  flex: 0 0 auto;
  border-radius: var(--radius);
  background: var(--warning-soft);
  color: var(--warning);
}

.review-card__icon--hard {
  background: var(--danger-soft);
  color: var(--danger);
}

.review-card__content {
  display: grid;
  min-width: 0;
  gap: 0.25rem;
  flex: 1;
}

.review-card__header h3 {
  margin: 0.45rem 0 0;
  font-size: 1.1rem;
}

.review-card--queue h3,
.review-card--queue p {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.review-card--queue h3 {
  margin: 0;
  font-size: 1rem;
}

.review-card--queue p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.review-card--queue .review-card__eyebrows {
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 750;
}

.review-card--queue .review-card__meta {
  font-size: 0.8rem;
}

.review-card--queue .review-card__actions {
  flex: 0 0 auto;
  justify-content: flex-end;
}

.review-card--queue .review-card__actions .button:first-child {
  opacity: 0;
  transition: opacity 160ms ease;
}

.review-card--queue:hover .review-card__actions .button:first-child {
  opacity: 1;
}

@media (max-width: 1200px) {
  .resource-viewer-layout {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .resource-main {
    order: 1;
  }

  .resource-sidebar {
    order: 2;
    min-width: 0;
  }

  .resource-outline-panel {
    max-height: none;
    overflow: visible;
  }

  .resource-outline-panel__body {
    overflow: visible;
  }

  .reader-resizer {
    display: none;
  }
}

@media (max-width: 900px) {
  .resource-page {
    overflow-x: clip;
  }

  .pdf-viewer__viewport {
    overflow: visible;
  }

  .pdf-viewer__canvas-wrap {
    max-height: none;
    overflow: visible;
  }

  .pdf-viewer__page-surface {
    width: 100%;
    min-width: 0;
  }

  .pdf-viewer__canvas {
    max-width: 100%;
  }
}

@media (max-width: 1100px) {
  .dashboard-grid,
  .dashboard-grid--lower,
  .grid--wide,
  .session-workspace,
  .session-lower-grid {
    grid-template-columns: 1fr;
  }

  .resource-session-widget {
    position: fixed;
    top: 4.75rem;
    right: 1rem;
    left: auto;
    width: min(22rem, calc(100vw - 2rem));
    max-height: calc(100vh - 1.5rem);
    margin-bottom: 1rem;
  }

}

@media (max-width: 1024px) {
  .app-shell {
    min-height: 100vh;
    overflow: hidden;
  }

  .app-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(18rem, calc(100vw - 3rem));
    height: 100vh;
    flex-basis: auto;
    border-right: 1px solid var(--line);
    border-bottom: 0;
    transform: translateX(-100%);
    transition: transform 180ms ease;
    box-shadow: var(--shadow-md);
  }

  .app-shell.is-mobile-nav-open .app-sidebar {
    transform: translateX(0);
  }

  .app-shell.is-sidebar-collapsed .app-sidebar {
    width: min(18rem, calc(100vw - 3rem));
    flex-basis: auto;
  }

  .sidebar-brand {
    padding: 1rem;
  }

  .sidebar-mobile-close.icon-button {
    display: inline-grid;
  }

  .sidebar-collapse.icon-button {
    display: none;
  }

  .sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 1rem;
  }

  .sidebar-footer {
    display: grid;
  }

  .app-shell.is-sidebar-collapsed .brand-wordmark,
  .app-shell.is-sidebar-collapsed .sidebar-link__text,
  .app-shell.is-sidebar-collapsed .sidebar-user__meta {
    display: inline;
  }

  .app-shell.is-sidebar-collapsed .sidebar-link {
    justify-content: flex-start;
  }

  .sidebar-link {
    min-height: 2.75rem;
    padding: 0.65rem 0.85rem;
  }

  .app-shell.is-sidebar-collapsed .sidebar-footer {
    display: grid;
  }

  .app-sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 25;
    display: block;
    border: 0;
    background: rgba(15, 23, 42, 0.52);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease;
  }

  .app-shell.is-mobile-nav-open .app-sidebar-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .app-main {
    height: auto;
    min-height: 100vh;
    overflow: hidden;
  }

  .app-content {
    padding: 1rem;
  }

  .app-topbar {
    padding: 0 1rem;
  }

  .topbar-mobile-toggle {
    display: inline-grid;
  }

  .global-search {
    min-width: 0;
    flex: 1;
  }
}

@media (max-width: 640px) {
  .dashboard-header,
  .page-header {
    align-items: flex-start;
  }

  .page-header__actions,
  .form-actions {
    width: 100%;
  }

  .app-topbar {
    min-height: auto;
    flex-wrap: wrap;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }

  .topbar-actions,
  .global-search {
    width: 100%;
  }

  .form-actions {
    align-items: center;
  }

  .button,
  .form-actions form {
    width: auto;
  }

  .page-header__actions .button,
  .modal-dialog__actions .button,
  .course-card--empty {
    width: 100%;
  }

  .resource-viewer-layout {
    border: 0;
    background: transparent;
  }

  .form-grid,
  .form-grid--compact,
  .status-form {
    grid-template-columns: 1fr;
  }

  .panel,
  .module-card,
  .active-session,
  .session-history-card,
  .session-stat-card,
  .page-status-panel,
  .stat-card,
  .course-card,
  .resource-card {
    padding: 1rem;
  }

  .review-row__body strong,
  .review-row__body small,
  .review-card--queue h3,
  .review-card--queue p {
    white-space: normal;
  }

  .review-card--queue {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .review-card--queue .review-card__actions,
  .review-card--queue .review-card__actions .button:first-child {
    width: 100%;
    opacity: 1;
  }

  .weekly-bars {
    gap: 0.45rem;
  }

  .resource-main,
  .resource-sidebar {
    padding: 0;
  }

  .resource-session-widget {
    top: auto;
    right: 0.75rem;
    bottom: 0.75rem;
    left: 0.75rem;
    width: auto;
    max-height: min(48vh, 31rem);
  }

  .resource-session-widget.is-collapsed {
    width: auto;
  }

  .pdf-viewer {
    gap: 0.75rem;
  }

  .pdf-viewer__toolbar {
    padding: 0.75rem;
    align-items: stretch;
  }

  .pdf-viewer__group {
    width: 100%;
  }

  .pdf-viewer__group .button {
    flex: 1 1 0;
  }

  .pdf-viewer__group--meta {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: end;
  }

  .viewer-field--page,
  .viewer-field--zoom {
    width: auto;
  }

  .pdf-viewer__viewport {
    min-height: 58vh;
    padding: 0.75rem;
    overflow: visible;
  }

  .pdf-viewer__expand {
    top: 1rem;
    right: 1rem;
  }

  .pdf-viewer__canvas-wrap {
    max-height: none;
    overflow: visible;
  }

  .pdf-viewer__page-surface {
    width: 100%;
    min-width: 0;
    padding: 0.5rem 0;
  }

  .pdf-viewer__canvas {
    max-width: 100%;
  }

  .app-loading-overlay {
    padding: 1rem;
  }

  .app-loading-overlay__card {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}

@media (min-width: 1201px) {
  .resource-sidebar {
    position: sticky;
    top: 1rem;
    align-self: start;
    min-height: 0;
    max-height: min(calc(100vh - 2rem), calc(72vh + 8rem));
    overflow: hidden;
    grid-template-rows: auto minmax(0, 1fr) auto;
  }

  .resource-outline-panel {
    min-height: 0;
    max-height: min(calc(100vh - 2rem), calc(72vh + 8rem));
    overflow: hidden;
  }

  .resource-outline-panel__body {
    min-height: 0;
    max-height: calc(min(calc(100vh - 2rem), calc(72vh + 8rem)) - 7.5rem);
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 0.35rem;
  }
}