:root {
  height: 100%;
  overflow: hidden;
  --bg: #f1f4f2;
  --panel: #fcfdfb;
  --panel-soft: #f7faf7;
  --panel-raised: #ffffff;
  --ink: #17211f;
  --muted: #65726d;
  --muted-soft: #88958f;
  --line: #d9e2dd;
  --line-strong: #c3d0c9;
  --teal: #0f766e;
  --teal-strong: #0b5f59;
  --teal-soft: #e7f5f2;
  --amber: #b7791f;
  --amber-soft: #fff6e3;
  --input-bg: #ffffff;
  --button-bg: #ffffff;
  --hover-bg: #edf4f0;
  --active-field-bg: #e9f8f4;
  --active-section-bg: #fff4df;
  --active-section-text: #68420a;
  --pill-bg: #e8f4f1;
  --subtle-bg: #e9f0ec;
  --quote-bg: #fff7e8;
  --quote-text: #5e3b05;
  --mark-bg: #fff1b8;
  --mark-text: #3f3300;
  --callout-note-bg: #eef7ff;
  --callout-note-border: #2b6cb0;
  --callout-note-title: #1f4e79;
  --callout-tip-bg: #effaf3;
  --callout-tip-border: #16834c;
  --callout-tip-title: #17633a;
  --callout-important-bg: #f5f1ff;
  --callout-important-border: #7c3aed;
  --callout-important-title: #5b21b6;
  --callout-warning-bg: #fff7ed;
  --callout-warning-border: #c2410c;
  --callout-warning-title: #9a3412;
  --callout-caution-bg: #fff1f2;
  --callout-caution-border: #be123c;
  --callout-caution-title: #9f1239;
  --code-text: var(--ink);
  --code-panel-bg: var(--panel-soft);
  --code-panel-border: var(--line);
  --code-header-bg: var(--table-head-bg);
  --code-header-text: var(--ink);
  --code-keyword: #6d28d9;
  --code-title: #0369a1;
  --code-string: #047857;
  --code-number: #b45309;
  --code-comment: #718078;
  --code-variable: #be185d;
  --code-attr: #92400e;
  --code-tag: #0f766e;
  --inline-code-bg: #eef3ef;
  --inline-code-text: #1c4d47;
  --diagram-bg: #f8fbfa;
  --diagram-grid: rgba(15, 118, 110, 0.07);
  --diagram-node-bg: #ecf8f5;
  --diagram-node-border: #0f766e;
  --diagram-node-text: #122522;
  --diagram-alt-bg: #fff6e6;
  --diagram-alt-border: #b7791f;
  --diagram-cluster-bg: rgba(237, 244, 239, 0.72);
  --diagram-line: #63746f;
  --diagram-label-bg: #ffffff;
  --diagram-shadow: 0 18px 46px rgba(22, 32, 29, 0.09);
  --emphasis-border: rgba(15, 118, 110, 0.42);
  --emphasis-glow: rgba(15, 118, 110, 0.08);
  --table-head-bg: #eef7f6;
  --table-row-alt: #fbfcfa;
  --danger-bg: #fff1ee;
  --danger-text: #a53629;
  --error-text: #b9382c;
  --scrollbar-track: #eef2ef;
  --scrollbar-thumb: #aebbb5;
  --scrollbar-thumb-hover: #708078;
  --focus-ring: rgba(15, 118, 110, 0.18);
  --teal-glow: rgba(15, 118, 110, 0.2);
  --amber-glow: rgba(183, 121, 31, 0.2);
  --control-shadow: 0 1px 1px rgba(18, 29, 26, 0.04), 0 7px 18px rgba(18, 29, 26, 0.05);
  --shadow: 0 16px 38px rgba(18, 29, 26, 0.09);
  --shadow-soft: 0 1px 2px rgba(18, 29, 26, 0.06), 0 14px 34px rgba(18, 29, 26, 0.07);
  --shadow-lift: 0 1px 2px rgba(18, 29, 26, 0.06), 0 22px 52px rgba(18, 29, 26, 0.12);
  --shadow-popover: 0 22px 62px rgba(18, 29, 26, 0.18);
  color-scheme: light;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="dark"] {
  --bg: #101412;
  --panel: #151b18;
  --panel-soft: #111614;
  --panel-raised: #1a211e;
  --ink: #f2f6f3;
  --muted: #a8b5af;
  --muted-soft: #77847d;
  --line: #293531;
  --line-strong: #3a4944;
  --teal: #5eead4;
  --teal-strong: #2dd4bf;
  --teal-soft: #14302c;
  --amber: #f0bd69;
  --amber-soft: #302516;
  --input-bg: #111714;
  --button-bg: #18201d;
  --hover-bg: #202925;
  --active-field-bg: #17302c;
  --active-section-bg: #302516;
  --active-section-text: #f0bd69;
  --pill-bg: #20342f;
  --subtle-bg: #1e2723;
  --quote-bg: #302516;
  --quote-text: #f3d7a4;
  --mark-bg: #574514;
  --mark-text: #fff2b7;
  --callout-note-bg: #132438;
  --callout-note-border: #60a5fa;
  --callout-note-title: #bfdbfe;
  --callout-tip-bg: #11291c;
  --callout-tip-border: #4ade80;
  --callout-tip-title: #bbf7d0;
  --callout-important-bg: #271b3d;
  --callout-important-border: #a78bfa;
  --callout-important-title: #ddd6fe;
  --callout-warning-bg: #331f12;
  --callout-warning-border: #fb923c;
  --callout-warning-title: #fed7aa;
  --callout-caution-bg: #35151d;
  --callout-caution-border: #fb7185;
  --callout-caution-title: #fecdd3;
  --code-text: var(--ink);
  --code-panel-bg: var(--panel-soft);
  --code-panel-border: var(--line);
  --code-header-bg: var(--table-head-bg);
  --code-header-text: var(--ink);
  --code-keyword: #c084fc;
  --code-title: #7dd3fc;
  --code-string: #86efac;
  --code-number: #fbbf24;
  --code-comment: #708079;
  --code-variable: #f9a8d4;
  --code-attr: #fde68a;
  --code-tag: #5eead4;
  --inline-code-bg: #22312b;
  --inline-code-text: #88f7e7;
  --diagram-bg: #101916;
  --diagram-grid: rgba(94, 234, 212, 0.08);
  --diagram-node-bg: #17302c;
  --diagram-node-border: #5eead4;
  --diagram-node-text: #f2f6f3;
  --diagram-alt-bg: #302516;
  --diagram-alt-border: #f0bd69;
  --diagram-cluster-bg: rgba(32, 42, 37, 0.72);
  --diagram-line: #9fb0aa;
  --diagram-label-bg: #18201d;
  --diagram-shadow: 0 20px 46px rgba(0, 0, 0, 0.22);
  --emphasis-border: rgba(94, 234, 212, 0.42);
  --emphasis-glow: rgba(94, 234, 212, 0.1);
  --table-head-bg: #20342f;
  --table-row-alt: #151c19;
  --danger-bg: #321d1b;
  --danger-text: #ffafa5;
  --error-text: #ffafa5;
  --scrollbar-track: #111714;
  --scrollbar-thumb: #3b4d46;
  --scrollbar-thumb-hover: #5eead4;
  --focus-ring: rgba(94, 234, 212, 0.18);
  --teal-glow: rgba(94, 234, 212, 0.2);
  --amber-glow: rgba(240, 189, 105, 0.2);
  --control-shadow: 0 1px 1px rgba(0, 0, 0, 0.18), 0 9px 22px rgba(0, 0, 0, 0.18);
  --shadow: 0 16px 38px rgba(0, 0, 0, 0.24);
  --shadow-soft: 0 1px 2px rgba(0, 0, 0, 0.22), 0 18px 42px rgba(0, 0, 0, 0.2);
  --shadow-lift: 0 1px 2px rgba(0, 0, 0, 0.26), 0 26px 62px rgba(0, 0, 0, 0.3);
  --shadow-popover: 0 24px 70px rgba(0, 0, 0, 0.46);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
  scrollbar-color: var(--scrollbar-thumb) transparent;
  scrollbar-width: thin;
}

::selection {
  background: var(--teal-soft);
  color: var(--ink);
}

*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  min-height: 44px;
  border: 2px solid transparent;
  border-radius: 999px;
  background: var(--scrollbar-thumb);
  background-clip: content-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

*::-webkit-scrollbar-corner {
  background: transparent;
}

*::-webkit-scrollbar-button {
  display: none;
  width: 0;
  height: 0;
}

@keyframes surface-enter {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.992);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes brand-breathe {
  0%,
  100% {
    box-shadow: 0 8px 18px var(--teal-glow);
  }

  50% {
    box-shadow:
      0 10px 24px var(--teal-glow),
      0 0 0 5px var(--teal-soft);
  }
}

@keyframes dot-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 var(--teal-glow);
    transform: translateY(-50%) scale(1);
  }

  50% {
    box-shadow: 0 0 0 6px transparent;
    transform: translateY(-50%) scale(1.2);
  }
}

@keyframes marker-glow {
  0%,
  100% {
    box-shadow: 0 0 0 0 var(--teal-glow);
  }

  50% {
    box-shadow: 0 0 0 5px transparent;
  }
}

body {
  height: 100vh;
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  overflow: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a,
button,
input {
  touch-action: manipulation;
}

#app {
  height: 100%;
  min-height: 0;
}

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

button {
  border: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

button:disabled,
input:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.login-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background: var(--bg);
}

.login-scroll-area {
  min-height: 100vh;
  max-height: 100vh;
  display: grid;
  place-items: center;
  overflow: auto;
  padding: clamp(16px, 3vw, 32px);
}

.login-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 30px;
  width: min(460px, 100%);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 8px;
  background: var(--panel-raised);
  padding: clamp(28px, 6vw, 58px);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: surface-enter 420ms ease backwards;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-icon {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 8px;
  background: var(--teal);
  color: var(--bg);
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(15, 118, 110, 0.16);
  animation: brand-breathe 5.4s ease-in-out infinite;
  transition:
    box-shadow 180ms ease,
    transform 180ms ease;
}

.brand-mark:hover .brand-icon {
  box-shadow:
    0 12px 30px var(--teal-glow),
    0 0 0 5px var(--teal-soft);
  transform: translateY(-1px) scale(1.03);
}

.brand-mark span:not(.brand-icon) {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.login-copy h1 {
  max-width: 10ch;
  margin: 0 0 14px;
  color: var(--ink);
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.login-copy p {
  max-width: 39rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.login-form {
  display: grid;
  gap: 14px;
  max-width: 420px;
}

.field-label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.text-input,
.search-input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--ink);
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  outline: 0;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

.text-input,
.search-input {
  min-height: 44px;
  padding: 0 13px;
}

.text-input:hover,
.search-input:hover {
  border-color: var(--line-strong);
  background: var(--panel-raised);
}

.text-input:focus,
.search-input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 4px var(--focus-ring);
  transform: translateY(-1px);
}

.primary-btn,
.tiny-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  border-radius: 8px;
  font-weight: 750;
  line-height: 1;
}

.primary-btn {
  background: var(--teal);
  color: var(--bg);
  padding: 0 16px;
  box-shadow: 0 8px 18px rgba(15, 118, 110, 0.16);
  transition:
    background 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.primary-btn:hover {
  background: var(--teal-strong);
  box-shadow: 0 10px 22px rgba(15, 118, 110, 0.2);
  transform: translateY(-1px);
}

.primary-btn:active {
  transform: translateY(0);
}

.tiny-btn {
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: var(--button-bg);
  color: var(--ink);
  font-size: 0.82rem;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.tiny-btn:hover {
  border-color: var(--line-strong);
  background: var(--hover-bg);
}

.error-text {
  min-height: 20px;
  margin: 0;
  color: var(--error-text);
  font-size: 0.9rem;
}

.app-shell {
  position: fixed;
  inset: 0;
  height: 100vh;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(288px, 320px) minmax(0, 1fr);
  overflow: hidden;
}

.app-shell.sidebar-collapsed {
  grid-template-columns: 72px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  z-index: 30;
  top: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  align-self: start;
  min-width: 0;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 18px 14px 10px;
  box-shadow:
    inset -1px 0 0 rgba(255, 255, 255, 0.34),
    10px 0 28px rgba(18, 29, 26, 0.04);
}

:root[data-theme="dark"] .sidebar {
  box-shadow:
    inset -1px 0 0 rgba(255, 255, 255, 0.04),
    12px 0 34px rgba(0, 0, 0, 0.22);
}

.sidebar-controls {
  display: grid;
  gap: 15px;
  padding: 0 4px 17px;
  border-bottom: 1px solid var(--line);
}

.sidebar-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-width: 0;
}

.sidebar .brand-mark {
  min-width: 0;
}

.sidebar-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  min-height: 34px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  padding: 0;
  flex: 0 0 auto;
  transition:
    background 160ms ease,
    box-shadow 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.sidebar-toggle:hover {
  background: var(--hover-bg);
  color: var(--teal);
  box-shadow: inset 0 0 0 1px var(--line);
}

.sidebar-toggle:active {
  transform: scale(0.94);
}

.sidebar-toggle-icon {
  display: block;
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.search-wrap {
  position: relative;
  width: 100%;
  min-width: 0;
}

.search-input {
  min-height: 46px;
  padding-left: 42px;
  padding-right: 86px;
  background: var(--panel);
  font-size: 0.94rem;
  box-shadow: var(--control-shadow);
}

:root[data-theme="dark"] .search-input {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.search-symbol {
  position: absolute;
  top: 50%;
  left: 16px;
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  color: var(--muted);
  pointer-events: none;
  transform: translateY(-50%);
}

.search-icon {
  display: block;
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.search-wrap.search-open .search-input {
  border-color: rgba(15, 118, 110, 0.46);
  box-shadow:
    0 0 0 4px var(--focus-ring),
    0 12px 30px var(--teal-glow);
}

.search-hotkey {
  position: absolute;
  top: 50%;
  right: 9px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0;
  font-size: 0.72rem;
  font-weight: 750;
  transform: translateY(-50%);
  pointer-events: none;
}

.search-hotkey span {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--panel-soft);
  padding: 0 7px;
  box-shadow:
    inset 0 -1px 0 rgba(23, 32, 31, 0.04),
    0 1px 0 rgba(255, 255, 255, 0.42);
}

.sidebar-footer {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 32px;
  align-items: center;
  gap: 8px;
  padding: 6px 4px 0;
  border-top: 1px solid var(--line);
}

.sidebar-footer-left {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
}

.sidebar-footer-center {
  display: flex;
  min-width: 0;
  justify-content: center;
}

.view-mode-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  min-width: 126px;
  min-height: 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--subtle-bg);
  padding: 2px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.34);
}

.view-mode-button {
  min-width: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  padding: 0 9px;
  font-size: 0.76rem;
  font-weight: 850;
  line-height: 1;
  transition:
    background 160ms ease,
    color 160ms ease,
    box-shadow 160ms ease;
}

.view-mode-button:hover {
  color: var(--ink);
}

.view-mode-button.active {
  background: var(--panel);
  color: var(--teal);
  box-shadow: var(--control-shadow);
}

.theme-toggle,
.logout-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--button-bg);
  color: var(--muted);
  padding: 0;
  flex: 0 0 auto;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.theme-toggle:hover,
.logout-button:hover {
  background: var(--hover-bg);
  border-color: var(--line);
  color: var(--teal);
  box-shadow: 0 8px 20px var(--teal-glow);
  transform: translateY(-1px);
}

.theme-toggle:active,
.logout-button:active {
  transform: scale(0.96);
}

.theme-toggle[aria-pressed="true"] {
  background: var(--amber-soft);
  border-color: rgba(183, 121, 31, 0.22);
  color: var(--amber);
}

.logout-button {
  font: inherit;
}

.sidebar-footer .theme-toggle,
.sidebar-footer .logout-button {
  width: 32px;
  height: 32px;
  min-height: 32px;
  border: 0;
  background: transparent;
}

.sidebar-footer .theme-toggle:hover,
.sidebar-footer .logout-button:hover {
  background: var(--hover-bg);
}

.sidebar-footer .logout-button {
  justify-self: end;
}

.sidebar-collapsed .sidebar {
  padding: 14px 10px;
}

.sidebar-collapsed .sidebar-controls {
  gap: 12px;
  padding: 0;
  border-bottom: 0;
}

.sidebar-collapsed .sidebar-brand-row {
  flex-direction: column;
  justify-content: flex-start;
}

.sidebar-collapsed .brand-mark {
  justify-content: center;
}

.sidebar-collapsed .brand-mark span:not(.brand-icon),
.sidebar-collapsed .search-wrap,
.sidebar-collapsed .field-picker,
.sidebar-collapsed .sidebar-scroll-wrap,
.sidebar-collapsed .sidebar-footer {
  display: none;
}

.theme-icon,
.header-icon {
  display: block;
  width: 19px;
  height: 19px;
  fill: currentColor;
}

.theme-icon-stroke {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 1.7vw, 24px);
  width: 100%;
  height: 100vh;
  min-height: 0;
  margin: 0 auto;
  overflow: hidden;
  padding: 24px clamp(18px, 2.6vw, 38px);
}

.main-grid.viewer {
  grid-template-columns: minmax(0, 1fr);
}

.main-grid.viewer.has-outline {
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
}

.content-scroll-wrap {
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  --custom-scrollbar-y-top: 0;
  --custom-scrollbar-y-right: 1px;
  --custom-scrollbar-y-bottom: 0;
}

.custom-scroll-wrap {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

[data-custom-scroll-area] {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

[data-custom-scroll-area]::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.custom-scrollbar {
  position: absolute;
  z-index: 4;
  border-radius: 999px;
  background: transparent;
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease;
}

.custom-scrollbar-y {
  top: var(--custom-scrollbar-y-top, 2px);
  right: var(--custom-scrollbar-y-right, 2px);
  bottom: var(--custom-scrollbar-y-bottom, 2px);
  width: 12px;
}

.custom-scrollbar-x {
  right: var(--custom-scrollbar-x-right, 2px);
  bottom: var(--custom-scrollbar-x-bottom, 2px);
  left: var(--custom-scrollbar-x-left, 2px);
  height: 12px;
}

.custom-scroll-wrap.has-scrollbar-y > .custom-scrollbar-y,
.custom-scroll-wrap.has-scrollbar-x > .custom-scrollbar-x {
  pointer-events: auto;
}

.custom-scroll-wrap.has-scrollbar-y.scrolling > .custom-scrollbar-y,
.custom-scroll-wrap.has-scrollbar-y.dragging-y > .custom-scrollbar-y,
.custom-scroll-wrap.has-scrollbar-y > .custom-scrollbar-y:hover,
.custom-scroll-wrap.has-scrollbar-x.scrolling > .custom-scrollbar-x,
.custom-scroll-wrap.has-scrollbar-x.dragging-x > .custom-scrollbar-x,
.custom-scroll-wrap.has-scrollbar-x > .custom-scrollbar-x:hover {
  opacity: 1;
}

.custom-scroll-wrap:not(.has-scrollbar-y) > .custom-scrollbar-y .custom-scrollbar-thumb {
  min-height: 0;
  height: 0 !important;
}

.custom-scroll-wrap:not(.has-scrollbar-x) > .custom-scrollbar-x .custom-scrollbar-thumb {
  min-width: 0;
  width: 0 !important;
}

.custom-scrollbar-thumb {
  position: absolute;
  border-radius: 999px;
  background: var(--scrollbar-thumb);
  box-shadow: 0 0 0 1px rgba(23, 32, 31, 0.04);
  transition:
    background 140ms ease,
    width 140ms ease,
    height 140ms ease,
    right 140ms ease,
    bottom 140ms ease;
}

.custom-scrollbar-y .custom-scrollbar-thumb {
  top: 0;
  right: 3px;
  width: 6px;
  min-height: 34px;
  cursor: grab;
  transform: translateY(0);
}

.custom-scrollbar-x .custom-scrollbar-thumb {
  bottom: 3px;
  left: 0;
  min-width: 34px;
  height: 6px;
  cursor: grab;
  transform: translateX(0);
}

.custom-scrollbar-y:hover .custom-scrollbar-thumb,
.custom-scroll-wrap.dragging-y > .custom-scrollbar-y .custom-scrollbar-thumb {
  right: 2px;
  width: 8px;
  background: var(--scrollbar-thumb-hover);
}

.custom-scrollbar-x:hover .custom-scrollbar-thumb,
.custom-scroll-wrap.dragging-x > .custom-scrollbar-x .custom-scrollbar-thumb {
  bottom: 2px;
  height: 8px;
  background: var(--scrollbar-thumb-hover);
}

.custom-scroll-wrap.dragging > .custom-scrollbar .custom-scrollbar-thumb {
  cursor: grabbing;
}

.sidebar-scroll-wrap {
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  --custom-scrollbar-y-top: 16px;
  --custom-scrollbar-y-right: 1px;
  --custom-scrollbar-y-bottom: 10px;
}

.sidebar-scroll {
  width: 100%;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 14px 14px 0 4px;
}

.outline-sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  min-width: 0;
  max-height: calc(100vh - 48px);
  overflow: hidden;
  --custom-scrollbar-y-top: 2px;
  --custom-scrollbar-y-right: 1px;
  --custom-scrollbar-y-bottom: 2px;
}

.outline-scroll-area {
  max-height: calc(100vh - 48px);
  overflow: auto;
  overscroll-behavior: contain;
  padding-right: 12px;
}

article {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.course-nav,
.empty-state,
.outline-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-raised);
  box-shadow: var(--shadow-soft);
  animation: surface-enter 360ms ease backwards;
}

.course-nav {
  padding: 16px;
}

.sidebar .course-nav {
  border: 0;
  background: transparent;
  padding: 0 2px 18px 0;
  box-shadow: none;
  animation: none;
}

.outline-panel {
  position: relative;
  padding: 12px;
  overflow: hidden;
}

.outline-list {
  display: grid;
  gap: 5px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.outline-item a {
  display: block;
  position: relative;
  border-left: 2px solid transparent;
  border-radius: 0 7px 7px 0;
  color: var(--muted);
  padding: 9px 24px 9px 12px;
  font-size: 0.84rem;
  font-weight: 650;
  line-height: 1.35;
  text-decoration: none;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.outline-item a:hover {
  border-color: var(--teal);
  background: var(--hover-bg);
  color: var(--ink);
  transform: translateX(1px);
}

.outline-item.active a {
  border-color: var(--teal);
  background: var(--active-field-bg);
  color: var(--ink);
  box-shadow:
    inset 0 0 0 1px rgba(15, 118, 110, 0.14),
    0 7px 18px rgba(15, 118, 110, 0.08);
}

.outline-item.active a::after {
  position: absolute;
  top: 50%;
  right: 8px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--teal);
  content: "";
  transform: translateY(-50%);
  animation: dot-pulse 2.6s ease-in-out infinite;
}

.outline-item.depth-3 a {
  margin-left: 12px;
  font-size: 0.78rem;
  font-weight: 600;
}

.field-picker {
  position: relative;
}

.field-picker-button {
  position: relative;
  display: grid;
  width: 100%;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  color: var(--ink);
  padding: 11px 12px;
  box-shadow: var(--control-shadow);
  text-align: left;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.field-picker-button::before {
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: -1px;
  width: 3px;
  border-radius: 999px;
  background: var(--teal);
  content: "";
  opacity: 0;
  transition: opacity 160ms ease;
}

.field-picker-button:hover,
.field-picker-button.open {
  border-color: rgba(15, 118, 110, 0.48);
  background: var(--active-field-bg);
  box-shadow:
    var(--shadow-soft),
    0 0 0 4px var(--focus-ring);
  transform: translateY(-1px);
}

.field-picker-button:hover::before,
.field-picker-button.open::before {
  opacity: 1;
}

.field-picker-button.open {
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.field-picker-main,
.field-option {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 22px;
  align-items: center;
  gap: 10px;
}

.field-picker-copy,
.field-option-copy {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.field-picker-copy strong,
.field-option-copy strong {
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 0.96rem;
  font-weight: 820;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.field-picker-copy span,
.field-option-copy span {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.field-chevron,
.field-check {
  display: block;
  width: 20px;
  height: 20px;
  justify-self: end;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.field-chevron {
  color: var(--muted);
  transition: transform 160ms ease;
}

.field-picker-button.open .field-chevron {
  transform: rotate(180deg);
}

.field-menu {
  position: absolute;
  z-index: 32;
  top: calc(100% + 8px);
  right: 0;
  left: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  max-height: 280px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-raised);
  box-shadow: var(--shadow-popover);
  animation: surface-enter 180ms ease backwards;
  --custom-scrollbar-y-top: 7px;
  --custom-scrollbar-y-right: 1px;
  --custom-scrollbar-y-bottom: 7px;
}

.field-menu-scroll {
  display: grid;
  gap: 6px;
  min-height: 0;
  max-height: 268px;
  overflow: auto;
  padding: 9px 14px 7px 6px;
  overscroll-behavior: contain;
}

.field-option {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--ink);
  padding: 11px 10px;
  text-align: left;
  transition:
    background 150ms ease,
    border-color 150ms ease,
    transform 150ms ease;
}

.field-option:hover {
  background: var(--hover-bg);
  transform: translateX(1px);
}

.field-option.active {
  border-color: rgba(15, 118, 110, 0.38);
  background: var(--active-field-bg);
  box-shadow: inset 3px 0 0 var(--teal);
}

.field-check {
  color: var(--teal);
}

.category-list,
.section-list,
.result-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.category-item {
  margin-bottom: 14px;
}

.category-button,
.section-button,
.result-button {
  width: 100%;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.category-button {
  position: relative;
  display: grid;
  gap: 0;
  padding: 11px 12px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.38);
  transition:
    background 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.category-button::before {
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: -1px;
  width: 3px;
  border-radius: 999px;
  background: var(--teal);
  content: "";
  opacity: 0;
  transition: opacity 160ms ease;
}

.category-button strong {
  min-width: 0;
  overflow: hidden;
  font-size: 0.92rem;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.category-button span {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.category-button.active {
  border-color: rgba(15, 118, 110, 0.42);
  background: var(--active-field-bg);
  box-shadow:
    inset 0 0 0 1px rgba(15, 118, 110, 0.1),
    0 8px 20px rgba(15, 118, 110, 0.08);
}

.category-button.active::before {
  opacity: 1;
}

.category-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-width: 0;
}

.category-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.count-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  padding: 0 8px;
  font-size: 0.76rem;
  font-weight: 800;
}

.category-button.active .count-chip {
  border-color: rgba(15, 118, 110, 0.28);
  color: var(--teal);
}

.category-chevron {
  display: block;
  width: 18px;
  height: 18px;
  color: var(--muted);
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 160ms ease;
}

.category-button.collapsed .category-chevron {
  transform: rotate(-90deg);
}

.section-list {
  margin: 8px 0 0;
  padding: 0 0 0 12px;
  border-left: 1px solid var(--line);
}

.section-button {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 9px;
  align-items: center;
  padding: 9px 10px;
  border: 1px solid transparent;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.section-button::before {
  position: absolute;
  top: 9px;
  bottom: 9px;
  left: -1px;
  width: 3px;
  border-radius: 999px;
  background: var(--amber);
  content: "";
  opacity: 0;
  transition: opacity 160ms ease;
}

.section-button:hover,
.category-button:hover,
.result-button:hover {
  background: var(--hover-bg);
}

.section-button:hover,
.category-button:hover {
  transform: translateX(1px);
}

.section-button:hover {
  box-shadow: var(--control-shadow);
}

.result-button.active {
  border-color: var(--line);
  background: var(--hover-bg);
  box-shadow: var(--control-shadow);
  transform: translateX(1px);
}

.result-button.active strong {
  color: var(--ink);
}

.section-button.active {
  border-color: rgba(183, 121, 31, 0.38);
  background: var(--active-section-bg);
  color: var(--active-section-text);
  box-shadow:
    inset 0 0 0 1px rgba(183, 121, 31, 0.1),
    0 10px 24px rgba(183, 121, 31, 0.1);
}

.section-button.active::before {
  opacity: 1;
}

.section-button.active strong {
  color: var(--active-section-text);
}

.section-button strong {
  min-width: 0;
  overflow: hidden;
  font-size: 0.86rem;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.section-button span {
  color: var(--muted);
  font-size: 0.77rem;
  line-height: 1.45;
}

.section-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
}

.section-button:hover .section-index {
  border-color: var(--line-strong);
  color: var(--ink);
}

.section-button.active .section-index {
  border-color: rgba(183, 121, 31, 0.28);
  background: var(--amber-soft);
  color: var(--active-section-text);
}

.section-nav-copy {
  display: grid;
  min-width: 0;
}

.nav-empty {
  margin: 10px 0 0;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 12px;
  font-size: 0.88rem;
}

.content-shell {
  width: 100%;
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  min-height: 0;
  overflow: auto;
  padding-right: 14px;
  overscroll-behavior: contain;
}

.content-shell > * {
  min-width: 0;
}

.section-header {
  position: relative;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--panel);
  padding: clamp(30px, 4vw, 48px);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: surface-enter 420ms ease backwards;
}

.section-copy {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-copy h1 {
  max-width: none;
  margin: 0;
  color: var(--ink);
  font-size: clamp(2rem, 3.8vw, 3.35rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.section-copy p {
  max-width: 86ch;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.reading-surface {
  position: relative;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: surface-enter 460ms ease 80ms backwards;
}

.markdown-body {
  min-width: 0;
  max-width: none;
  margin: 0;
  padding: clamp(38px, 5vw, 70px);
  color: var(--ink);
  font-size: 1.06rem;
  line-height: 1.84;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  scroll-margin-top: calc(var(--reader-sticky-top, 0px) + 32px);
  color: var(--ink);
  line-height: 1.18;
  letter-spacing: 0;
}

.markdown-body h1 {
  margin: 0 0 26px;
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
}

.markdown-body h2 {
  position: relative;
  margin: 48px 0 16px;
  padding-top: 18px;
  padding-left: 16px;
  border-top: 1px solid var(--line);
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
}

.markdown-body h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.markdown-body h2::before {
  position: absolute;
  bottom: 0.18em;
  left: 0;
  width: 4px;
  height: 0.9em;
  border-radius: 999px;
  background: var(--teal);
  content: "";
  animation: marker-glow 3.2s ease-in-out infinite;
}

.markdown-body h2:first-child::before {
  bottom: 0.18em;
}

.markdown-body h3 {
  color: var(--teal);
  margin: 34px 0 12px;
  font-size: 1.16rem;
}

.markdown-body p {
  margin: 0 0 20px;
  max-width: 94ch;
}

.markdown-body strong {
  color: var(--ink);
  font-weight: 800;
}

.markdown-body em {
  color: var(--muted);
  font-style: italic;
}

.markdown-body u {
  text-decoration-color: var(--teal);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  font-weight: 700;
}

.markdown-body mark {
  border-radius: 5px;
  background: var(--mark-bg);
  color: var(--mark-text);
  padding: 1px 5px;
  font-weight: 750;
}

.markdown-body ul,
.markdown-body ol {
  margin: 0 0 22px;
  padding-left: 24px;
  max-width: 94ch;
}

.markdown-body li + li {
  margin-top: 8px;
}

.markdown-body li::marker {
  color: var(--teal);
  font-weight: 850;
}

.markdown-body blockquote {
  margin: 28px 0;
  border-left: 3px solid var(--amber);
  background: var(--quote-bg);
  border-radius: 0 8px 8px 0;
  padding: 17px 19px 17px 21px;
  color: var(--quote-text);
  font-weight: 650;
  line-height: 1.65;
  box-shadow: inset 0 0 0 1px rgba(183, 121, 31, 0.08);
}

.markdown-body blockquote > :first-child {
  margin-top: 0;
}

.markdown-body blockquote > :last-child {
  margin-bottom: 0;
}

.markdown-body .callout {
  margin: 26px 0;
  border: 1px solid var(--line);
  border-left-width: 5px;
  border-radius: 8px;
  padding: 18px 20px;
  box-shadow: var(--shadow-soft);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.markdown-body .callout:hover {
  box-shadow: var(--shadow-lift);
  transform: translateY(-1px);
}

.markdown-body .callout-title {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  line-height: 1;
}

.markdown-body .callout-title-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.45rem;
  height: 1.45rem;
  flex: 0 0 auto;
  line-height: 1;
}

.markdown-body .callout-icon {
  display: block;
  width: 1.12rem;
  height: 1.12rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.1;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.markdown-body .callout-title-text {
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.markdown-body .callout-body > :last-child {
  margin-bottom: 0;
}

.markdown-body .callout-note {
  border-left-color: var(--callout-note-border);
  background: var(--callout-note-bg);
}

.markdown-body .callout-note .callout-title {
  color: var(--callout-note-title);
}

.markdown-body .callout-tip {
  border-left-color: var(--callout-tip-border);
  background: var(--callout-tip-bg);
}

.markdown-body .callout-tip .callout-title {
  color: var(--callout-tip-title);
}

.markdown-body .callout-important {
  border-left-color: var(--callout-important-border);
  background: var(--callout-important-bg);
}

.markdown-body .callout-important .callout-title {
  color: var(--callout-important-title);
}

.markdown-body .callout-warning {
  border-left-color: var(--callout-warning-border);
  background: var(--callout-warning-bg);
}

.markdown-body .callout-warning .callout-title {
  color: var(--callout-warning-title);
}

.markdown-body .callout-caution {
  border-left-color: var(--callout-caution-border);
  background: var(--callout-caution-bg);
}

.markdown-body .callout-caution .callout-title {
  color: var(--callout-caution-title);
}

.markdown-body code {
  border-radius: 5px;
  background: var(--inline-code-bg);
  padding: 2px 6px 3px;
  color: var(--inline-code-text);
  font-size: 0.92em;
}

.markdown-body .code-block {
  max-width: 100%;
  overflow: hidden;
  margin: 32px 0;
  border: 1px solid var(--emphasis-border);
  border-left-width: 4px;
  border-radius: 8px;
  background: var(--code-panel-bg);
  box-shadow:
    0 0 0 5px var(--emphasis-glow),
    var(--shadow-soft);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.markdown-body .code-block:hover,
.markdown-body .math-block:hover,
.markdown-body .equation-panel:hover,
.markdown-body .table-shell:hover,
.markdown-body .mermaid-shell:hover {
  box-shadow:
    0 0 0 5px var(--emphasis-glow),
    var(--shadow-lift);
  transform: translateY(-1px);
}

.markdown-body .code-block-header {
  display: flex;
  min-height: 42px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--emphasis-border);
  background: var(--code-header-bg);
  color: var(--code-header-text);
  padding: 0 16px;
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.code-copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  opacity: 0.74;
  padding: 0;
  transition:
    color 160ms ease,
    opacity 160ms ease,
    transform 160ms ease;
}

.code-copy-button:hover {
  color: var(--teal);
  opacity: 1;
  transform: translateY(-1px);
}

.code-copy-button:active {
  transform: scale(0.92);
}

.code-copy-button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

.code-copy-button.copied {
  color: var(--teal);
  opacity: 1;
  transform: none;
}

.code-copy-icon {
  display: block;
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.15;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition:
    opacity 160ms ease,
    transform 180ms ease;
}

.code-copy-button:hover .code-copy-default-icon {
  transform: scale(1.08);
}

.code-copy-button .code-copy-success-icon {
  display: none;
}

.code-copy-button.copied .code-copy-default-icon {
  display: none;
}

.code-copy-button.copied .code-copy-success-icon {
  display: block;
  animation: code-copy-success 220ms ease-out;
}

@keyframes code-copy-success {
  from {
    opacity: 0;
    transform: scale(0.72) rotate(-8deg);
  }

  to {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

.markdown-body .code-scroll-wrap {
  background: var(--code-panel-bg);
  --custom-scrollbar-y-top: 8px;
  --custom-scrollbar-y-right: 2px;
  --custom-scrollbar-y-bottom: 8px;
  --custom-scrollbar-x-right: 8px;
  --custom-scrollbar-x-bottom: 2px;
  --custom-scrollbar-x-left: 8px;
}

.markdown-body .code-block pre {
  max-width: 100%;
  max-height: min(66vh, 680px);
  overflow: auto;
  margin: 0;
  background: var(--code-panel-bg);
  color: var(--code-text);
  padding: 20px 22px 26px;
  line-height: 1.62;
  overscroll-behavior: contain;
}

.markdown-body .code-block code {
  display: block;
  min-width: max-content;
  background: transparent;
  padding: 0;
  color: inherit;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9rem;
  white-space: pre;
}

.markdown-body .code-block .hljs-keyword,
.markdown-body .code-block .hljs-selector-tag,
.markdown-body .code-block .hljs-literal,
.markdown-body .code-block .hljs-section,
.markdown-body .code-block .hljs-link {
  color: var(--code-keyword);
}

.markdown-body .code-block .hljs-title,
.markdown-body .code-block .hljs-title.class_,
.markdown-body .code-block .hljs-title.function_,
.markdown-body .code-block .hljs-built_in,
.markdown-body .code-block .hljs-type {
  color: var(--code-title);
}

.markdown-body .code-block .hljs-string,
.markdown-body .code-block .hljs-regexp,
.markdown-body .code-block .hljs-symbol,
.markdown-body .code-block .hljs-bullet,
.markdown-body .code-block .hljs-addition {
  color: var(--code-string);
}

.markdown-body .code-block .hljs-number,
.markdown-body .code-block .hljs-params,
.markdown-body .code-block .hljs-template-variable {
  color: var(--code-number);
}

.markdown-body .code-block .hljs-comment,
.markdown-body .code-block .hljs-quote,
.markdown-body .code-block .hljs-deletion {
  color: var(--code-comment);
}

.markdown-body .code-block .hljs-variable,
.markdown-body .code-block .hljs-variable.language_,
.markdown-body .code-block .hljs-subst {
  color: var(--code-variable);
}

.markdown-body .code-block .hljs-attr,
.markdown-body .code-block .hljs-attribute,
.markdown-body .code-block .hljs-property {
  color: var(--code-attr);
}

.markdown-body .code-block .hljs-tag,
.markdown-body .code-block .hljs-name,
.markdown-body .code-block .hljs-selector-class,
.markdown-body .code-block .hljs-selector-id {
  color: var(--code-tag);
}

.markdown-body a {
  color: var(--teal);
  font-weight: 700;
  text-decoration-color: rgba(15, 118, 110, 0.34);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition:
    color 160ms ease,
    text-decoration-color 160ms ease;
}

.markdown-body a:hover {
  color: var(--teal-strong);
  text-decoration-color: currentColor;
}

.markdown-body .math-block {
  max-width: 100%;
  overflow: hidden;
  margin: 32px 0;
  border: 1px solid var(--emphasis-border);
  border-left-width: 4px;
  border-radius: 8px;
  background: var(--panel-soft);
  box-shadow:
    0 0 0 5px var(--emphasis-glow),
    var(--shadow-soft);
  --custom-scrollbar-x-right: 8px;
  --custom-scrollbar-x-bottom: 2px;
  --custom-scrollbar-x-left: 8px;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.markdown-body .math-scroll {
  max-width: 100%;
  overflow: auto;
  padding: 20px 22px 26px;
  overscroll-behavior: contain;
}

.markdown-body .katex {
  color: var(--ink);
  font-size: 1.06em;
}

.markdown-body .katex-display {
  margin: 0;
}

.markdown-body .math-fallback {
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
  border-radius: 5px;
  background: var(--inline-code-bg);
  padding: 2px 6px;
  color: var(--inline-code-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  vertical-align: middle;
}

.markdown-body .math-block .math-fallback {
  display: block;
  background: transparent;
  padding: 0;
  color: var(--ink);
  white-space: pre-wrap;
}

.markdown-body .equation-panel {
  max-width: 100%;
  overflow: hidden;
  margin: 32px 0;
  border: 1px solid var(--emphasis-border);
  border-left-width: 4px;
  border-radius: 8px;
  background: var(--panel-soft);
  box-shadow:
    0 0 0 5px var(--emphasis-glow),
    var(--shadow-soft);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.markdown-body .equation-panel > :first-child {
  margin-top: 0;
}

.markdown-body .equation-panel > :last-child {
  margin-bottom: 0;
}

.markdown-body .equation-panel .math-block {
  margin: 0;
  border: 0;
  border-bottom: 1px solid var(--emphasis-border);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.markdown-body .equation-panel > p {
  margin: 0;
  padding: 16px 22px;
  color: var(--muted);
}

.markdown-body .equation-panel > p + p {
  padding-top: 0;
}

.markdown-body .equation-panel > p strong:first-child {
  color: var(--teal);
  font-weight: 850;
}

.markdown-body .equation-meaning-list {
  margin: 0;
  border-top: 1px solid var(--emphasis-border);
  background: var(--panel);
  padding: 18px 22px;
}

.markdown-body .equation-meaning-items {
  display: grid;
  gap: 8px;
}

.markdown-body .equation-meaning-item {
  display: grid;
  grid-template-columns: minmax(92px, max-content) minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  padding: 10px 12px;
  transition:
    border-color 160ms ease,
    background 160ms ease;
}

.markdown-body .equation-meaning-item:hover {
  border-color: var(--line-strong);
  background: var(--panel-raised);
}

.markdown-body .equation-meaning-term {
  min-width: 0;
  overflow-x: auto;
  color: var(--ink);
  font-weight: 850;
  white-space: nowrap;
}

.markdown-body .equation-meaning-text {
  min-width: 0;
  color: var(--muted);
  line-height: 1.5;
}

.markdown-body .equation-panel .table-shell {
  margin: 0;
  border: 0;
  border-top: 1px solid var(--emphasis-border);
  border-radius: 0;
  background: var(--panel);
  box-shadow: none;
}

.markdown-body .equation-panel table {
  font-size: 0.92rem;
}

.markdown-body .mermaid-shell {
  position: relative;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  margin: 34px 0;
  border: 1px solid var(--emphasis-border);
  border-left-width: 4px;
  border-radius: 8px;
  background-color: var(--diagram-bg);
  box-shadow:
    0 0 0 5px var(--emphasis-glow),
    var(--diagram-shadow);
  --custom-scrollbar-y-top: 8px;
  --custom-scrollbar-y-right: 2px;
  --custom-scrollbar-y-bottom: 8px;
  --custom-scrollbar-x-right: 10px;
  --custom-scrollbar-x-bottom: 2px;
  --custom-scrollbar-x-left: 10px;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.markdown-body .mermaid-scroll {
  display: grid;
  place-items: start center;
  width: 100%;
  max-height: min(72vh, 720px);
  overflow: auto;
  padding: clamp(24px, 4vw, 40px);
  overscroll-behavior: contain;
}

.markdown-body .mermaid-diagram {
  display: flex;
  width: max-content;
  min-width: 100%;
  justify-content: center;
  color: var(--ink);
  isolation: isolate;
}

.markdown-body .mermaid-diagram svg {
  display: block;
  width: var(--mermaid-svg-width, auto) !important;
  max-width: none !important;
  height: auto !important;
  overflow: visible;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
}

.markdown-body .compact-mermaid-shell {
  margin: 24px 0;
}

.markdown-body .compact-mermaid-shell .mermaid-scroll {
  padding: 18px 20px;
}

.markdown-body .mermaid-diagram.compact-diagram {
  width: max-content;
  min-width: 100%;
}

.markdown-body .mermaid-diagram .node rect,
.markdown-body .mermaid-diagram .node circle,
.markdown-body .mermaid-diagram .node ellipse,
.markdown-body .mermaid-diagram .node polygon,
.markdown-body .mermaid-diagram .node path {
  filter: drop-shadow(0 7px 12px rgba(22, 32, 29, 0.12));
  stroke-width: 1.7px !important;
}

.markdown-body .flowchart-diagram .node rect {
  rx: 9px;
  ry: 9px;
}

.markdown-body .mermaid-diagram .nodeLabel,
.markdown-body .mermaid-diagram .edgeLabel,
.markdown-body .mermaid-diagram .label,
.markdown-body .mermaid-diagram .label span {
  color: var(--diagram-node-text) !important;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
  font-weight: 700 !important;
  line-height: 1.35 !important;
}

.markdown-body .mermaid-diagram .edgeLabel,
.markdown-body .mermaid-diagram .edgeLabel p {
  border-radius: 5px;
  background: var(--diagram-label-bg) !important;
}

.markdown-body .mermaid-diagram .flowchart-link,
.markdown-body .mermaid-diagram .edgePath .path,
.markdown-body .mermaid-diagram path.flowchart-link {
  stroke: var(--diagram-line) !important;
  stroke-width: 2.2px !important;
}

.markdown-body .mermaid-diagram marker path,
.markdown-body .mermaid-diagram marker polygon {
  fill: var(--diagram-line) !important;
  stroke: var(--diagram-line) !important;
}

.markdown-body .mermaid-error {
  min-width: 0;
  justify-content: flex-start;
  border-radius: 6px;
  background: var(--danger-bg);
  padding: 10px 12px;
  color: var(--danger-text);
  font-size: 0.94rem;
  font-weight: 700;
}

.section-asset {
  display: block;
  margin: 26px 0;
}

.section-asset img {
  display: block;
  width: min(100%, 920px);
  max-height: 540px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.asset-caption {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.86rem;
}

.asset-missing {
  display: inline-flex;
  border: 1px dashed var(--line);
  border-radius: 6px;
  background: var(--panel-soft);
  color: var(--muted);
  padding: 4px 8px;
  font-size: 0.9rem;
}

.markdown-body hr {
  height: 1px;
  margin: 32px 0;
  border: 0;
  background: var(--line);
}

.markdown-body .table-shell {
  max-width: 100%;
  overflow: hidden;
  margin: 32px 0;
  border: 1px solid var(--emphasis-border);
  border-left-width: 4px;
  border-radius: 8px;
  background: var(--panel);
  box-shadow:
    0 0 0 5px var(--emphasis-glow),
    var(--shadow-soft);
  --custom-scrollbar-x-right: 8px;
  --custom-scrollbar-x-bottom: 2px;
  --custom-scrollbar-x-left: 8px;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.markdown-body .table-scroll {
  max-width: 100%;
  overflow: auto;
  padding-bottom: 10px;
  overscroll-behavior: contain;
}

.markdown-body table {
  display: table;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  overflow-wrap: break-word;
  word-break: normal;
}

.markdown-body th {
  background: var(--table-head-bg);
  color: var(--ink);
  font-weight: 800;
}

.markdown-body tbody tr:nth-child(even) {
  background: var(--table-row-alt);
}

.markdown-body tbody tr {
  transition: background 150ms ease;
}

.markdown-body tbody tr:hover {
  background: var(--hover-bg);
}

.markdown-body .table-shell th:first-child,
.markdown-body .table-shell td:first-child {
  border-left: 0;
}

.markdown-body .table-shell th:last-child,
.markdown-body .table-shell td:last-child {
  border-right: 0;
}

.markdown-body .table-shell thead tr:first-child th {
  border-top: 0;
}

.markdown-body .table-shell tbody tr:last-child td {
  border-bottom: 0;
}

.search-popover {
  position: absolute;
  z-index: 80;
  top: calc(100% + 9px);
  right: auto;
  left: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: min(540px, calc(100vw - 32px));
  max-height: min(540px, calc(100vh - 128px));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-raised);
  box-shadow: var(--shadow-popover);
  animation: surface-enter 180ms ease backwards;
}

.search-popover header {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-soft);
}

.search-results-wrap {
  min-height: 0;
  --custom-scrollbar-y-top: 8px;
  --custom-scrollbar-y-right: 1px;
  --custom-scrollbar-y-bottom: 8px;
}

.search-results-scroll {
  min-height: 0;
  max-height: calc(min(540px, calc(100vh - 128px)) - 62px);
  overflow: auto;
  overscroll-behavior: contain;
  padding-right: 8px;
}

.search-popover h2 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
}

.search-popover p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.result-list {
  padding: 10px 12px 12px 10px;
}

.result-button {
  display: grid;
  gap: 6px;
  border: 1px solid transparent;
  padding: 13px 12px;
  transition:
    background 150ms ease,
    box-shadow 150ms ease,
    border-color 150ms ease,
    transform 150ms ease;
}

.result-button:hover {
  border-color: var(--line);
  box-shadow: var(--control-shadow);
  transform: translateX(1px);
}

.result-button strong {
  font-size: 0.96rem;
}

.result-button span {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.empty-state {
  padding: 30px;
  color: var(--muted);
  line-height: 1.6;
}

:root[data-theme="dark"] .search-hotkey span,
:root[data-theme="dark"] .view-mode-switch,
:root[data-theme="dark"] .category-button {
  box-shadow: none;
}

:root[data-theme="dark"] .section-header,
:root[data-theme="dark"] .reading-surface,
:root[data-theme="dark"] .outline-panel {
  border-color: var(--line);
}

:root[data-theme="dark"] .section-copy h1,
:root[data-theme="dark"] .markdown-body h1,
:root[data-theme="dark"] .markdown-body h2 {
  color: #f8fbf9;
}

:root[data-theme="dark"] .section-copy p,
:root[data-theme="dark"] .markdown-body p {
  color: #c5d0cb;
}

.empty-state h2 {
  margin: 0 0 8px;
  color: var(--ink);
}

.hidden {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}

@media (max-width: 1320px) {
  .app-shell {
    grid-template-columns: minmax(280px, 304px) minmax(0, 1fr);
  }

  .main-grid,
  .main-grid.viewer,
  .main-grid.viewer.has-outline {
    grid-template-columns: minmax(0, 1fr);
  }

  .outline-sidebar {
    display: none;
  }
}

@media (max-width: 820px) {
  .login-scroll-area {
    padding: 0;
  }

  .login-panel {
    min-height: 100vh;
    border-width: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .search-hotkey {
    display: none;
  }

  .sidebar-footer-left {
    gap: 6px;
  }

  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr);
  }

  .app-shell.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 14px;
  }

  .sidebar-collapsed .sidebar {
    padding: 12px;
  }

  .sidebar-collapsed .sidebar-brand-row {
    flex-direction: row;
    justify-content: space-between;
  }

  .sidebar-scroll-wrap {
    max-height: clamp(170px, 27vh, 250px);
  }

  .sidebar-scroll {
    overflow: auto;
  }

  .search-popover {
    width: min(540px, calc(100vw - 28px));
    max-height: min(480px, calc(100vh - 160px));
  }

  .search-results-scroll {
    max-height: calc(min(480px, calc(100vh - 160px)) - 62px);
  }

  .main-grid,
  .main-grid.viewer,
  .main-grid.viewer.has-outline {
    grid-template-columns: 1fr;
    height: 100%;
    min-height: 0;
    overflow: hidden;
    padding-top: 16px;
  }

  .content-scroll-wrap {
    order: 2;
  }

  .content-shell {
    min-height: 0;
    overflow: auto;
  }

  .section-header {
    padding: 28px;
  }
}

@media (max-width: 520px) {
  .login-panel {
    padding: 24px;
  }

  .theme-toggle,
  .logout-button {
    width: 38px;
    height: 38px;
    min-height: 38px;
  }

  .brand-icon {
    width: 34px;
    height: 34px;
  }

  .sidebar .brand-mark {
    min-width: 0;
  }

  .sidebar {
    padding: 12px;
  }

  .sidebar-controls {
    padding-right: 0;
    padding-left: 0;
  }

  .sidebar-scroll-wrap {
    max-height: clamp(150px, 24vh, 210px);
  }

  .search-input {
    padding-right: 14px;
  }

  .search-popover {
    width: calc(100vw - 24px);
  }

  .section-header {
    padding: 20px;
  }

  .section-copy h1 {
    max-width: none;
    font-size: 2rem;
  }

  .markdown-body {
    padding: 24px;
    font-size: 1rem;
    line-height: 1.74;
  }

  .markdown-body .code-block pre {
    max-height: min(38vh, 320px);
  }

  .markdown-body .math-block {
    margin: 22px 0;
  }

  .markdown-body .math-scroll {
    padding: 14px 12px 20px;
  }

  .markdown-body .equation-panel {
    margin: 22px 0;
  }

  .markdown-body .equation-panel .math-block {
    margin: 0;
  }

  .markdown-body .equation-panel > p {
    padding: 14px 12px;
  }

  .markdown-body .equation-meaning-list {
    padding: 14px 12px;
  }

  .markdown-body .equation-meaning-item {
    grid-template-columns: 1fr;
    gap: 6px;
    align-items: start;
    padding: 10px;
  }

  .markdown-body .equation-meaning-term {
    white-space: normal;
  }

  .markdown-body .mermaid-shell {
    max-height: min(68vh, 560px);
    margin: 22px 0;
    background-size: 22px 22px;
  }

  .markdown-body .mermaid-scroll {
    max-height: min(68vh, 560px);
    padding: 14px;
  }

  .markdown-body .compact-mermaid-shell {
    margin: 18px 0;
  }

  .markdown-body .compact-mermaid-shell .mermaid-scroll {
    padding: 12px;
  }

  .markdown-body .table-shell {
    margin: 22px 0;
  }

  .markdown-body th,
  .markdown-body td {
    padding: 10px 12px;
  }

  .markdown-body .mermaid-diagram,
  .markdown-body .mermaid-diagram svg {
    max-width: none !important;
  }

  .markdown-body .mermaid-diagram {
    min-width: 100%;
  }

  .markdown-body .mermaid-diagram svg {
    width: var(--mermaid-svg-width, auto) !important;
    max-width: none !important;
  }

  .primary-btn {
    flex: 1;
  }
}