.curriculum-page { overflow: hidden; background: #f5f0e9; }

.map-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2vw, 2rem);
  height: 66px;
  padding: 0 2.5vw;
  background: #fffaf2;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 22px rgba(71,46,32,0.06);
}
.map-brand { display: inline-flex; align-items: center; gap: 0.65rem; min-width: 280px; text-decoration: none; }
.map-brand .brand-mark { width: 38px; height: 38px; flex: 0 0 auto; }
.map-brand strong { display: block; font-family: var(--serif); font-size: 1rem; line-height: 1.1; }
.map-brand small { display: block; margin-top: 0.2rem; color: var(--muted); font-size: 0.5rem; letter-spacing: 0.1em; }
.map-search { display: flex; align-items: center; flex: 0 1 230px; min-width: 170px; height: 34px; padding: 0 0.55rem; color: var(--muted); background: #fff; border: 1px solid #d8cec5; border-radius: 99px; transition: border-color 0.2s, box-shadow 0.2s; }
.map-search:focus-within { border-color: var(--green); box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 13%, transparent); }
.map-search > span { flex: 0 0 auto; color: var(--green); font-size: 1rem; }
.map-search input { width: 100%; min-width: 0; padding: 0 0.4rem; color: var(--ink); background: transparent; border: 0; outline: 0; font-size: 0.63rem; }
.map-search input::placeholder { color: #9b9189; }
.map-search output { flex: 0 0 auto; color: var(--coral); font-size: 0.49rem; white-space: nowrap; }
.header-filters { flex: 1 1 auto; }
.domain-filters { display: flex; flex-wrap: nowrap; align-items: center; gap: 3px; padding: 3px; background: rgba(232,224,216,.68); border: 1px solid rgba(120,91,73,.13); border-radius: 11px; box-shadow: inset 0 1px 2px rgba(75,48,34,.045); }
.domain-filter { --domain-accent: #55765d; position: relative; display: inline-flex; align-items: center; gap: .42rem; min-height: 30px; padding: .36rem .66rem; color: #766b64; background: transparent; border: 0; border-radius: 8px; cursor: pointer; font-size: .6rem; font-weight: 650; white-space: nowrap; transition: color .18s ease,background-color .18s ease,box-shadow .18s ease,transform .18s ease; }
.domain-filter::before { content: ""; width: 7px; height: 7px; flex: 0 0 auto; background: var(--domain-accent); border-radius: 50%; box-shadow: 0 0 0 3px color-mix(in srgb,var(--domain-accent) 12%,transparent); transition: background-color .18s ease,box-shadow .18s ease,transform .18s ease; }
.domain-filter[data-domain="number"] { --domain-accent: #c45427; }
.domain-filter[data-domain="geometry"] { --domain-accent: #d08b22; }
.domain-filter[data-domain="statistics"] { --domain-accent: #86618e; }
.domain-filter[data-domain="practice"] { --domain-accent: #55765d; }
.domain-filter[data-domain="geometry"]::before { border-radius: 1px; transform: rotate(45deg); }
.domain-filter[data-domain="statistics"]::before { height: 9px; border-radius: 4px 4px 1px 1px; }
.domain-filter[data-domain="practice"]::before { background: transparent; border: 2px solid var(--domain-accent); box-shadow: none; }
.domain-filter:hover { color: color-mix(in srgb,var(--domain-accent) 82%,#342923); background: rgba(255,255,255,.68); }
.domain-filter:hover::before { transform: scale(1.18); }
.domain-filter[data-domain="geometry"]:hover::before { transform: rotate(45deg) scale(1.18); }
.domain-filter[aria-pressed="true"] { color: white; background: var(--domain-accent); box-shadow: 0 4px 10px color-mix(in srgb,var(--domain-accent) 22%,transparent),inset 0 1px rgba(255,255,255,.2); }
.domain-filter[aria-pressed="true"]::before { background: white; box-shadow: 0 0 0 3px rgba(255,255,255,.17); }
.domain-filter[data-domain="practice"][aria-pressed="true"]::before { background: transparent; border-color: white; box-shadow: none; }
.domain-filter:active { transform: translateY(1px); }
.domain-filter:focus-visible,.layout-mode-toggle:focus-visible { outline: 3px solid color-mix(in srgb,var(--green) 24%,transparent); outline-offset: 2px; }
.layout-mode-toggle { display: block; min-height: 30px; margin-right: 4px; padding: 0; color: #6f625a; background: transparent; border: 0; border-radius: 8px; cursor: pointer; white-space: nowrap; }
.layout-toggle-options { position: relative; display: grid; grid-template-columns: repeat(2,minmax(2.45rem,1fr)); align-items: center; min-height: 30px; padding: 2px; isolation: isolate; background: rgba(255,255,255,.38); border-radius: 8px; }
.layout-toggle-options i { position: absolute; z-index: 0; inset: 2px auto 2px 2px; width: calc(50% - 2px); background: white; border-radius: 6px; box-shadow: 0 2px 7px rgba(65,42,29,.12); transition: transform .26s cubic-bezier(.22,.8,.28,1),background-color .2s ease; }
.layout-toggle-options > span { position: relative; z-index: 1; padding-inline: .38rem; font-size: .55rem; font-weight: 720; letter-spacing: .035em; transition: color .2s ease; }
.layout-mode-toggle:not([aria-pressed="true"]) .layout-toggle-options > span:first-of-type,
.layout-mode-toggle[aria-pressed="true"] .layout-toggle-options > span:last-of-type { color: var(--green); }
.layout-mode-toggle[aria-pressed="true"] .layout-toggle-options i { transform: translateX(100%); }
.layout-mode-toggle:hover .layout-toggle-options { background: rgba(255,255,255,.62); }
.map-actions { display: flex; align-items: center; flex: 0 0 auto; gap: 2px; padding: 3px; background: rgba(232,224,216,.68); border: 1px solid rgba(120,91,73,.13); border-radius: 10px; box-shadow: inset 0 1px 2px rgba(75,48,34,.045); }
.map-actions button, .map-actions a { display: grid; place-items: center; min-width: 30px; height: 30px; padding: 0 .52rem; color: #6f625a; background: transparent; border: 0; border-radius: 7px; cursor: pointer; font-size: .68rem; font-weight: 700; text-decoration: none; transition: color .18s ease,background-color .18s ease,box-shadow .18s ease,transform .18s ease; }
.map-actions button:hover, .map-actions a:hover { color: var(--green); background: rgba(255,255,255,.76); box-shadow: 0 2px 6px rgba(65,42,29,.08); }
.map-actions button:active, .map-actions a:active { transform: translateY(1px); }
.map-actions button:focus-visible, .map-actions a:focus-visible { outline: 3px solid color-mix(in srgb,var(--green) 24%,transparent); outline-offset: 1px; }
.map-actions > span { display: grid; place-items: center; min-width: 40px; height: 30px; color: #877970; font-size: .58rem; font-variant-numeric: tabular-nums; text-align: center; }
.map-actions .reset-view { display: inline-flex; gap: .26rem; min-width: 49px; color: var(--green); background: rgba(255,255,255,.46); font-size: .58rem; }
.map-actions .reset-view::before { content: "↺"; font-size: .82rem; font-weight: 500; line-height: 1; }

.map-workspace { position: fixed; inset: 66px 0 0; overflow: hidden; }
.map-viewport {
  position: absolute;
  inset: 0;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  overscroll-behavior: contain;
  user-select: none;
  -webkit-user-select: none;
  background-color: #f5f0e9;
  background-image: radial-gradient(circle, rgba(129,93,70,0.15) 1px, transparent 1px);
  background-size: 22px 22px;
}
.map-viewport.is-dragging { cursor: grabbing; }
.map-canvas { position: absolute; top: 0; left: 0; width: max-content; padding: 0; transform-origin: 0 0; }
.map-viewport.is-interacting .map-canvas, .map-canvas.is-focusing { will-change: transform; }
.map-canvas.is-focusing { transition: transform 0.42s cubic-bezier(0.22, 0.8, 0.32, 1); }
.stage-bands, .grade-grid { display: grid; grid-template-columns: repeat(12, 286px); gap: 14px; }
.stage-bands { position: relative; z-index: 6; margin-bottom: 0.7rem; }
.stage-band { display: flex; align-items: center; justify-content: space-between; min-height: 42px; padding: 0.5rem 0.9rem; color: white; background: var(--stage-color); box-shadow: 0 5px 15px rgba(72,47,34,0.13); }
.stage-band strong { font-family: var(--serif); font-size: 0.96rem; }
.stage-band span { opacity: 0.76; font-size: 0.58rem; letter-spacing: 0.08em; }
.stage-band.primary { grid-column: span 5; }.stage-band.junior { grid-column: span 4; }.stage-band.senior { grid-column: span 3; }

.grade-grid { position: relative; z-index: 2; align-items: stretch; }
.grade-column { --stage-color: #888; min-height: 100%; padding: 0 0.7rem 1.2rem; contain: layout style; background: rgba(255,255,255,0.88); border-top: 4px solid var(--stage-color); box-shadow: 0 8px 22px rgba(78,40,23,0.075); }
.grade-heading { display: flex; align-items: flex-start; justify-content: space-between; min-height: 62px; margin: 0 -0.7rem; padding: 0.85rem 0.8rem 0.65rem; background: rgba(255,255,255,0.98); border-bottom: 1px solid #e1d8cf; }
.grade-heading strong { display: block; font-family: var(--serif); font-size: 1.12rem; }
.grade-heading small { color: var(--muted); font-size: 0.56rem; letter-spacing: 0.06em; }
.grade-number { color: color-mix(in srgb, var(--stage-color) 72%, #5f4e44); font-family: Georgia, serif; font-size: 1.35rem; }
.term-block { margin-top: 0.9rem; transition: opacity 0.22s; }
.term-block + .term-block { margin-top: 0.58rem; }
.term-heading { display: flex; align-items: end; justify-content: space-between; min-height: 40px; margin: 0 0 0.82rem; padding: 0.25rem 0.18rem 0.48rem; color: var(--ink); background: transparent; border-bottom: 2px solid color-mix(in srgb, var(--stage-color) 62%, #d8d0c9); }
.term-heading strong { color: color-mix(in srgb, var(--stage-color) 78%, #493a32); font-family: var(--serif); font-size: 1rem; letter-spacing: .04em; }
.term-heading span { color: color-mix(in srgb, var(--stage-color) 54%, #80736b); font-size: 0.53rem; }
.unit-list { display: grid; gap: 0.58rem; }
.unit-card { position: relative; padding: 0.65rem; background: #e7e3de; border: 1px solid #d8d1ca; border-left: 4px solid color-mix(in srgb, var(--unit-stage) 65%, #bdb5ad); transition: opacity 0.24s, filter 0.24s, transform 0.2s, box-shadow 0.2s; }
.map-canvas.is-context-focused .unit-card { opacity: .13; }
.map-canvas.is-context-focused .unit-card.is-context-focus { z-index: 5; opacity: 1; filter: none; box-shadow: 0 0 0 5px color-mix(in srgb,var(--unit-stage) 24%,transparent),0 16px 36px rgba(60,38,27,.2); }
.map-canvas.is-context-clearing .unit-card { transition: transform .2s,box-shadow .2s !important; }
.unit-card[data-heat="1"] { background: color-mix(in srgb, var(--unit-stage) 22%, #eee9e3); border-color: color-mix(in srgb, var(--unit-stage) 42%, #d8d1ca); }
.unit-card[data-heat="2"] { background: color-mix(in srgb, var(--unit-stage) 42%, #e9e2dc); border-color: color-mix(in srgb, var(--unit-stage) 62%, #cfc6be); }
.unit-card[data-heat="3"] { color: white; background: color-mix(in srgb, var(--unit-stage) 70%, #c8bbb1); border-color: var(--unit-stage); }
.unit-card[data-heat="4"] { color: white; background: var(--unit-stage); border-color: color-mix(in srgb, var(--unit-stage) 72%, #4d3429); }
.unit-card:hover { transform: translateY(-1px); box-shadow: 0 7px 18px rgba(71,46,32,0.08); }
.unit-card.is-dimmed { opacity: 0.08; filter: grayscale(1); pointer-events: none; }
.term-block.is-muted { opacity: 0.18; pointer-events: none; }
.unit-card.is-search-dimmed { opacity: 0.1; filter: grayscale(1); }
.unit-card.is-search-match { z-index: 3; border-color: var(--unit-stage); box-shadow: 0 0 0 4px color-mix(in srgb, var(--unit-stage) 28%, transparent), 0 12px 28px rgba(66,40,27,0.16); }
.unit-heading { display: grid; gap: 0.1rem; margin-bottom: 0.45rem; }
.unit-heading span { color: color-mix(in srgb, var(--unit-stage) 78%, #4e4037); font-size: 0.5rem; font-weight: 700; letter-spacing: 0.08em; }
.unit-card[data-heat="3"] .unit-heading span, .unit-card[data-heat="4"] .unit-heading span { color: rgba(255,255,255,0.76); }
.unit-heading strong { font-family: var(--serif); font-size: 0.78rem; line-height: 1.35; }
.unit-focus-button { display: none; }
.knowledge-list { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.knowledge-chip { display: inline-flex; align-items: center; gap: 0.35rem; min-height: 28px; max-width: 100%; padding: 0.28rem 0.48rem; color: #706963; background: #eeece8; border: 1px solid #ddd9d3; border-radius: 3px; cursor: pointer; font-size: 0.6rem; line-height: 1.35; text-align: left; transition: 0.18s; }
.knowledge-chip, .unit-focus-button { touch-action: none; -webkit-user-select: none; user-select: none; }
.knowledge-chip:hover { color: var(--ink); background: #e6e2dc; border-color: #c8c1b9; }
.knowledge-chip:focus-visible { outline: 3px solid color-mix(in srgb, var(--node-stage) 42%, transparent); outline-offset: 2px; }
.knowledge-chip i { flex: 0 0 auto; width: 5px; height: 5px; background: #b8b1aa; border-radius: 50%; }
.knowledge-chip[data-status="planning"] { color: var(--ink); background: color-mix(in srgb, var(--node-stage) 11%, white); border-color: color-mix(in srgb, var(--node-stage) 60%, white); }
.knowledge-chip[data-status="planning"] i { background: var(--node-stage); box-shadow: 0 0 0 3px color-mix(in srgb, var(--node-stage) 15%, transparent); }
.knowledge-chip[data-status="drafted"], .knowledge-chip[data-status="recorded"] { color: white; background: var(--node-stage); border-color: var(--node-stage); }
/* Semantic zoom: turn dense lesson details into readable chapter landmarks. */
.map-canvas[data-zoom-level="overview"] .unit-card {
  display: grid;
  place-items: center;
  min-height: 112px;
  height: 112px;
  padding: 1rem;
  overflow: hidden;
  isolation: isolate;
  color: var(--ink);
  background: color-mix(in srgb,var(--unit-stage) 9%,#f7f4f0);
  border-color: color-mix(in srgb,var(--unit-stage) 23%,#d8d1ca);
  border-left: 11px solid color-mix(in srgb,var(--unit-stage) 65%,#bdb4ac);
}
.map-canvas[data-zoom-level="overview"] .unit-card:hover { transform: none; box-shadow: none; }
.map-canvas[data-zoom-level="overview"] .unit-card:has(.unit-focus-button:hover),
.map-canvas[data-zoom-level="overview"] .unit-card:has(.unit-focus-button:focus-visible) {
  border-color: var(--unit-stage);
  background: #fffaf2;
  box-shadow: 0 0 0 7px color-mix(in srgb, var(--unit-stage) 22%, transparent), 0 12px 30px rgba(61, 39, 28, 0.16);
}
.map-canvas[data-zoom-level="overview"] .unit-focus-button {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: zoom-in;
}
.map-canvas[data-zoom-level="overview"] .unit-focus-button:focus-visible { outline: 4px solid var(--unit-stage); outline-offset: -5px; }
.map-canvas[data-zoom-level="overview"] .knowledge-list {
  display: none;
}
.map-canvas[data-zoom-level="overview"] .unit-heading {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  margin: 0;
  text-align: center;
}
.map-canvas[data-zoom-level="overview"] .unit-heading span { display: none; }
.map-canvas[data-zoom-level="overview"] .unit-heading strong {
  display: block;
  color: var(--ink);
  font-size: 2.05rem;
  line-height: 1.12;
  text-wrap: balance;
  text-shadow: 0 1px 2px rgba(255,255,255,0.98);
}
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="1"],
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="2"],
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="3"],
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="4"] { color: white; background: var(--unit-stage); border-color: color-mix(in srgb,var(--unit-stage) 75%,#4b372d); }
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="1"] .unit-heading strong,
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="2"] .unit-heading strong,
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="3"] .unit-heading strong,
.map-canvas[data-zoom-level="overview"] .unit-card[data-heat="4"] .unit-heading strong { color: white; text-shadow: 0 1px 8px rgba(44,28,22,0.5); }
.map-canvas[data-zoom-level="overview"] .stage-band { min-height: 100px; }
.map-canvas[data-zoom-level="overview"] .stage-band strong { font-size: 4rem; line-height: 1; }
.map-canvas[data-zoom-level="overview"] .stage-band span { font-size: 1.45rem; }
.map-canvas[data-zoom-level="overview"] .grade-heading { min-height: 112px; padding-top: 1.15rem; }
.map-canvas[data-zoom-level="overview"] .grade-heading strong { font-size: 3.15rem; line-height: 1.04; }
.map-canvas[data-zoom-level="overview"] .grade-heading small { font-size: 1rem; }
.map-canvas[data-zoom-level="overview"] .grade-number { font-size: 3.1rem; }
.map-canvas[data-zoom-level="overview"] .term-heading { min-height: 66px; padding: .25rem .25rem .55rem; background: transparent; border: 0; border-bottom: 7px solid color-mix(in srgb,var(--stage-color) 68%,#d2c8c0); }
.map-canvas[data-zoom-level="overview"] .term-heading strong { font-size: 2.35rem; }
.map-canvas[data-zoom-level="overview"] .term-heading span { display: none; }
.map-canvas[data-zoom-level] .unit-card.is-filtered-out,
.map-canvas[data-zoom-level] .term-block.is-filtered-out { display: none; }

.map-hud { position: absolute; z-index: 15; bottom: 1rem; left: 1rem; display: grid; gap: .65rem; padding: .72rem .82rem; color: var(--muted); background: rgba(255,250,242,.94); border: 1px solid rgba(103,76,60,.16); box-shadow: 0 8px 24px rgba(58,39,28,.08); pointer-events: none; }
.map-legend { display: flex; flex-wrap: nowrap; align-items: center; gap: .8rem; font-size: .56rem; }
.map-legend span { display: inline-flex; align-items: center; gap: 0.26rem; }
.status-swatch { width: 13px; height: 8px; border-radius: 2px; }
.status-swatch.pending { background: #e7e4df; border: 1px solid #d3cec7; }
.status-swatch.planning { background: #fff0df; border: 1px solid var(--coral); }
.status-swatch.ready { background: var(--green); border: 1px solid color-mix(in srgb,var(--green) 78%,#2f241f); }
.map-progress { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .35rem; width: 100%; }
.map-metric { display: grid; align-content: start; gap: .12rem; min-width: 0; padding-top: .48rem; border-top: 1px solid rgba(103,76,60,.14); }
.map-metric strong { color: var(--ink); font-family: var(--serif); font-size: 1.24rem; font-weight: 600; line-height: 1; }
.map-metric small { overflow-wrap: anywhere; color: var(--muted); font-size: .5rem; line-height: 1.25; }

.lesson-dialog { width: min(1120px, calc(100% - 2rem)); max-height: calc(100dvh - 1.5rem); padding: 0; overflow-x: hidden; overscroll-behavior: contain; color: var(--ink); background: #fffaf2; border: 0; box-shadow: 0 34px 90px rgba(44,27,19,0.34); }
.lesson-dialog[open] { animation: dialog-enter 0.38s cubic-bezier(0.2, 0.86, 0.28, 1) both; }
.lesson-dialog[open]::backdrop { animation: backdrop-enter 0.28s ease-out both; }
.lesson-dialog.is-closing { animation: dialog-exit 0.18s ease-in both; }
.lesson-dialog.is-closing::backdrop { animation: backdrop-exit 0.18s ease-in both; }
.lesson-dialog::backdrop { background: rgba(39,27,22,0.78); }
.is-lesson-open .map-header,
.is-lesson-open .map-canvas,
.is-lesson-open .map-hud,
.lesson-dialog .dialog-close { position: fixed; top: calc(50% - min(50vh - 1.25rem, 430px) + 1rem); right: max(calc(50% - min(560px, 50vw - 1rem) + 1rem), 1.5rem); z-index: 10; }
.lesson-dialog-inner { min-height: 640px; }
.lesson-dialog-header { position: relative; isolation: isolate; overflow: hidden; padding: clamp(2rem, 5vw, 4.5rem) clamp(1.5rem, 5vw, 4.5rem) 2rem; color: white; background: radial-gradient(circle at 82% 18%, rgba(255,255,255,0.18), transparent 24%), linear-gradient(135deg, color-mix(in srgb, var(--dialog-stage) 88%, #3b2118), var(--dialog-stage)); }
.lesson-dialog-inner.is-empty-lesson .lesson-dialog-header { background: radial-gradient(circle at 82% 18%, rgba(255,255,255,.13), transparent 24%), linear-gradient(135deg,#77726e,#a19b96); }
.lesson-dialog-header::after { position: absolute; z-index: -1; right: 6%; bottom: -54%; width: 250px; aspect-ratio: 1; content: ""; border: 1px solid rgba(255,255,255,0.2); border-radius: 50%; box-shadow: 0 0 0 34px rgba(255,255,255,0.045), 0 0 0 72px rgba(255,255,255,0.025); }
.lesson-dialog[open] .lesson-dialog-header,.lesson-dialog[open] .thought-note,.lesson-dialog[open] .version-tabs,.lesson-dialog[open] .version-panel { animation: none; }
.lesson-breadcrumb { color: rgba(255,255,255,0.7); font-size: 0.66rem; letter-spacing: 0.08em; }
.lesson-dialog-header h2 { max-width: 820px; margin: 0.65rem 0 0.8rem; font-family: var(--serif); font-size: clamp(2.2rem, 4.3vw, 4.2rem); line-height: 1.12; letter-spacing: -0.04em; }
.lesson-submeta { display: flex; align-items: center; gap: 0.7rem; font-size: 0.72rem; }
.lesson-state { padding: 0.25rem 0.55rem; color: var(--ink); background: rgba(255,255,255,0.88); border-radius: 99px; }
.thought-note { display: grid; grid-template-columns: 145px 1fr; gap: 1.3rem; margin: 0; padding: 1.4rem clamp(1.5rem, 5vw, 4.5rem); color: #6f4d32; background: #ffe6bd; }
.thought-note span { color: var(--coral); font-size: 0.66rem; font-weight: 800; letter-spacing: 0.08em; }
.thought-note p { margin: 0; font-family: var(--serif); font-size: 0.94rem; line-height: 1.7; }
.version-tabs { display: flex; gap: 0; padding: 1.3rem clamp(1.5rem, 5vw, 4.5rem) 0; overflow-x: auto; background: #fffaf2; border-bottom: 1px solid #e0d8cf; }
.version-tabs button { flex: 0 0 auto; padding: 0.7rem 0.9rem; color: var(--muted); background: transparent; border: 0; border-bottom: 2px solid transparent; cursor: pointer; font-size: 0.68rem; }
.version-tabs button[aria-selected="true"] { color: var(--green); border-bottom-color: var(--green); font-weight: 700; }
.version-panel { padding: 2rem clamp(1.5rem, 5vw, 4.5rem) 3.5rem; }
.version-panel.is-loading { display: grid; place-items: center; min-height: 330px; }
.panel-loading { color: var(--muted); font-family: var(--serif); font-size: .78rem; letter-spacing: .08em; }
.lesson-dialog[open] .version-panel.is-switching { will-change: opacity, transform; animation: panel-switch 0.28s cubic-bezier(0.22, 0.8, 0.28, 1); }
.version-panel.is-switching-forward { --panel-switch-x: 28px; }
.version-panel.is-switching-backward { --panel-switch-x: -28px; }
.course-overview { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; width: min(100%,920px); margin-inline: auto; }
.course-overview article { min-height: 150px; padding: 1.15rem 1.25rem; background: rgba(255,255,255,.72); border: 1px solid #e1d8cf; }
.course-overview article > span { display: block; margin-bottom: .8rem; color: var(--green); font-family: var(--serif); font-size: 1rem; font-weight: 700; }
.course-overview article > i { color: #aaa19a; font-size: .72rem; font-style: normal; }
.course-overview.is-empty { display: block; min-height: 300px; }
.version-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.6rem; }
.video-slot { width: min(100%, 920px); aspect-ratio: 16 / 9; min-height: 0; margin-inline: auto; overflow: hidden; background: #211814; }
.lesson-video { display: block; width: 100%; height: 100%; min-height: 0; object-fit: contain; background: #211814; }
.video-placeholder { display: grid; place-content: center; width: 100%; height: 100%; min-height: 0; padding: 2rem; color: white; background: #30231e; text-align: center; }
.video-placeholder > span { display: grid; place-items: center; width: 58px; height: 58px; margin: 0 auto 1rem; color: var(--green); background: white; border-radius: 50%; }
.video-placeholder strong { font-family: var(--serif); font-size: 1.15rem; }
.video-placeholder small { margin-top: 0.45rem; color: rgba(255,255,255,0.58); font-size: 0.62rem; }
.lesson-plan { align-self: start; width: min(100%, 920px); margin-inline: auto; }
.plan-kicker { margin: 0 0 0.5rem; color: var(--coral); font-size: 0.6rem; font-weight: 800; letter-spacing: 0.14em; }
.lesson-version-meta { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.7rem 0 1.25rem; }
.lesson-version-meta span { padding: 0.3rem 0.55rem; color: var(--green); background: #edf4ee; border-radius: 99px; font-size: 0.6rem; font-weight: 700; }
.lesson-document { padding: 1.1rem 0 0.35rem; border-top: 1px solid #e3dbd1; }
.lesson-document + .lesson-document { margin-top: 1rem; }
.lesson-document > h3 { margin: 0 0 0.8rem; color: var(--green); font-family: var(--serif); font-size: 1.25rem; }
.lesson-document.reflection > h3 { color: var(--coral); }
.lesson-document.board-document > h3 { color: var(--green); }
.lesson-empty-note { margin: .3rem 0; color: #aaa19a; font-size: .76rem; }
.lesson-markdown { color: var(--muted); font-size: 0.76rem; line-height: 1.78; }
.lesson-markdown h3, .lesson-markdown h4 { margin: 1.15rem 0 0.45rem; color: var(--ink); font-family: var(--serif); }
.lesson-markdown p { margin: 0.45rem 0; }
.lesson-markdown ul, .lesson-markdown ol { margin: 0.45rem 0 0.75rem; padding-left: 1.2rem; }
.lesson-markdown blockquote { margin: 0.75rem 0; padding: 0.7rem 0.9rem; color: var(--green); background: #edf4ee; border-left: 3px solid var(--green); }
.lesson-markdown hr { margin: 1rem 0; border: 0; border-top: 1px solid #e3dbd1; }
.lesson-markdown code { padding: 0.08rem 0.25rem; background: #f1ece6; border-radius: 2px; font-size: 0.72rem; }
.plan-row { display: grid; grid-template-columns: 85px 1fr; gap: 1rem; padding: 0.85rem 0; border-top: 1px solid #e3dbd1; }
.plan-row > span { color: var(--green); font-size: 0.67rem; font-weight: 700; }
.plan-row p { margin: 0; color: var(--muted); font-size: 0.78rem; }
.resource-link { display: inline-flex; margin-top: 1rem; padding: 0.65rem 0.85rem; color: white; background: var(--green); border-radius: 3px; font-size: 0.7rem; font-weight: 700; text-decoration: none; }
.board-preview { margin: 1.2rem 0 0; padding: 0.6rem; background: white; border: 1px solid #e0d7ce; }
.board-preview img { display: block; width: 100%; max-height: 420px; object-fit: contain; }
.board-preview figcaption { margin-top: 0.45rem; color: var(--muted); font-size: 0.58rem; }
.empty-version { min-height: 330px; display: grid; place-content: center; max-width: 560px; margin: 0 auto; text-align: center; }
.empty-version > span { color: var(--coral); font-size: 2.5rem; }
.empty-version h3 { margin: 0.6rem 0 0; font-family: var(--serif); font-size: 1.5rem; }
.empty-version p { color: var(--muted); font-size: 0.82rem; }

@keyframes dialog-enter { from { opacity: 0; transform: translateY(24px) scale(0.965); } to { opacity: 1; transform: none; } }
@keyframes dialog-exit { to { opacity: 0; transform: translateY(14px) scale(0.98); } }
@keyframes backdrop-enter { from { opacity: 0; } to { opacity: 1; } }
@keyframes backdrop-exit { to { opacity: 0; } }
@keyframes content-rise { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes panel-switch { from { opacity: 0.18; transform: translate3d(var(--panel-switch-x, 28px),0,0); } to { opacity: 1; transform: translate3d(0,0,0); } }

@media (max-width: 1050px) {
  .map-header { height: 108px; align-content: center; flex-wrap: wrap; gap: 0.5rem 1rem; }
  .map-brand { min-width: 260px; }
  .map-search { flex: 1 1 190px; }
  .header-filters { order: 3; flex-basis: 100%; }
  .domain-filters { justify-content: center; }
  .map-actions { margin-left: auto; }
  .map-workspace { inset-block-start: 108px; }
}

@media (max-width: 680px) {
  .map-header { display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto auto; height: 176px; padding: 0.55rem 4vw; }
  .map-brand { grid-column: 1; grid-row: 1; min-width: 0; }
  .map-brand strong { font-size: 0.85rem; }
  .map-brand small { display: none; }
  .map-brand .brand-mark { width: 34px; height: 34px; }
  .map-search { grid-column: 1 / -1; grid-row: 2; width: 100%; max-width: none; }
  .header-filters { grid-column: 1 / -1; grid-row: 3; order: initial; overflow-x: auto; }
  .domain-filters { justify-content: flex-start; }
  .domain-filter { min-height: 30px; padding-inline: 0.56rem; }
  .map-actions { grid-column: 2; grid-row: 1; margin: 0; }
  .map-actions .reset-view, .map-actions a { display: none; }
  .map-workspace { inset-block-start: 176px; }
  .stage-bands, .grade-grid { grid-template-columns: repeat(12, 260px); gap: 11px; }
  .map-hud { left: 0.65rem; bottom: 0.65rem; max-width: calc(100% - 1.3rem); }
  .map-legend { display: none; }
  .lesson-dialog { width: 100vw; max-width: none; height: 100vh; height: 100dvh; max-height: none; margin: 0; border-radius: 0; }
  .lesson-dialog .dialog-close { position: fixed; top: max(0.7rem, env(safe-area-inset-top)); right: 0.7rem; float: none; width: 42px; height: 42px; margin: 0; box-shadow: 0 6px 18px rgba(35,24,18,0.24); }
  .lesson-dialog-inner { min-height: 100%; }
  .lesson-dialog-header { padding: calc(3.7rem + env(safe-area-inset-top)) 1rem 1.15rem; }
  .lesson-breadcrumb { padding-right: 2.5rem; font-size: 0.58rem; line-height: 1.55; }
  .lesson-dialog-header h2 { margin-block: 0.45rem 0.65rem; font-size: clamp(1.85rem, 9vw, 2.45rem); }
  .lesson-submeta { align-items: flex-start; flex-wrap: wrap; gap: 0.45rem 0.65rem; }
  .thought-note { grid-template-columns: 1fr; gap: 0.35rem; padding: 0.9rem 1rem; }
  .thought-note p { font-size: 0.85rem; line-height: 1.6; }
  .version-tabs { position: sticky; z-index: 6; top: 0; padding: 0.45rem 0.8rem 0; overflow-y: hidden; box-shadow: 0 6px 16px rgba(58,39,28,0.07); scrollbar-width: none; }
  .version-tabs::-webkit-scrollbar { display: none; }
  .version-tabs button { min-height: 44px; padding: 0.65rem 0.72rem; font-size: 0.7rem; }
  .version-panel { padding: 0.9rem 1rem calc(1.5rem + env(safe-area-inset-bottom)); }
  .course-overview { grid-template-columns: 1fr; gap: .7rem; }
  .course-overview article { min-height: 112px; padding: .9rem 1rem; }
  .course-overview.is-empty { min-height: 220px; }
  .version-layout { gap: 1.15rem; }
  .video-slot { width: 100%; aspect-ratio: 16 / 9; border-radius: 3px; }
  .video-placeholder { padding: 1rem; }
  .video-placeholder > span { width: 48px; height: 48px; margin-bottom: 0.65rem; }
  .video-placeholder strong { font-size: 1rem; }
  .lesson-markdown { font-size: 0.82rem; line-height: 1.72; }
  .plan-row { grid-template-columns: 1fr; gap: 0.25rem; }
  .resource-link { width: 100%; justify-content: center; min-height: 44px; }
  .board-preview { margin-inline: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .unit-card, .knowledge-chip { transition: none; }
  .lesson-dialog[open], .lesson-dialog[open]::backdrop, .lesson-dialog[open] .lesson-dialog-header, .lesson-dialog[open] .thought-note, .lesson-dialog[open] .version-tabs, .lesson-dialog[open] .version-panel { animation: none; }
}

.is-embedded-map { --overview-control-gap: 14px; }
.is-embedded-map .map-header { inset: 14px auto auto 14px; display: grid; align-content: start; gap: .55rem; width: 176px; height: auto; min-height: 0; padding: 10px; background: rgba(255,250,242,.72); border: 1px solid rgba(103,76,60,.2); border-radius: 0; box-shadow: 0 10px 28px rgba(49,31,23,.1); backdrop-filter: blur(9px); transition: opacity .2s ease,background-color .2s ease,box-shadow .2s ease; }
.is-embedded-map .map-brand { display: none; }
.is-embedded-map .map-workspace { inset: 0; }
.is-embedded-map .map-viewport { inset: 0; }
.is-embedded-map .map-search { width: 100%; min-width: 0; margin: 0; }
.is-embedded-map .header-filters { width: 100%; }
.is-embedded-map .domain-filters { display: grid; grid-template-columns: 1fr; gap: 3px; width: 100%; margin: 0; padding: 4px; }
.is-embedded-map .domain-filter { justify-content: flex-start; width: 100%; min-height: 30px; padding: .3rem .58rem; font-size: .56rem; }
.is-embedded-map .layout-mode-toggle { width: 100%; min-height: 31px; margin: 0 0 2px; }
.is-embedded-map .layout-toggle-options { grid-template-columns: repeat(2,1fr); width: 100%; }
.is-embedded-map .map-actions { display: grid; grid-template-columns: 26px 36px 26px minmax(0,1fr); width: 100%; margin: 0; }
.is-embedded-map .map-actions button { min-width: 0; padding-inline: 0; }
.is-embedded-map .map-actions > span { min-width: 0; }
.is-embedded-map .map-actions .reset-view { grid-column: 4; grid-row: 1; min-width: 0; padding-inline: .28rem; }
.is-embedded-map .map-actions a { display: none; }
.is-embedded-map .map-hud { right: 14px; bottom: 14px; left: auto; display: grid; gap: .55rem; width: 264px; padding: .72rem .78rem; background: rgba(255,250,242,.72); border-color: rgba(103,76,60,.2); box-shadow: 0 10px 28px rgba(49,31,23,.1); pointer-events: auto; backdrop-filter: blur(9px); transition: opacity .2s ease,background-color .2s ease,box-shadow .2s ease; }
.is-embedded-map .map-legend { justify-content: space-between; gap: .5rem; }
.is-embedded-map .map-progress { width: 100%; }

@media (hover: hover) and (pointer: fine) {
  .is-embedded-map .map-header,
  .is-embedded-map .map-hud { opacity: .62; }
  .is-embedded-map .map-header:hover,
  .is-embedded-map .map-header:focus-within,
  .is-embedded-map .map-hud:hover { opacity: 1; background: rgba(255,250,242,.96); box-shadow: 0 12px 34px rgba(49,31,23,.15); }
}

@media (max-width: 680px) {
  .is-embedded-map .map-header { display: grid; grid-template-columns: minmax(0,1fr) auto; grid-template-rows: auto auto; gap: .45rem; inset: max(8px,env(safe-area-inset-top)) auto auto 8px; width: calc(100vw - 68px); min-height: 0; padding: .48rem; opacity: 1; }
  .is-embedded-map .map-viewport { inset: 0; }
  .is-embedded-map .map-search { grid-column: 1; grid-row: 1; }
  .is-embedded-map .map-actions { display: flex; grid-column: 2; grid-row: 1; width: auto; }
  .is-embedded-map .map-actions .reset-view { display: none; }
  .is-embedded-map .header-filters { grid-column: 1 / -1; grid-row: 2; overflow-x: auto; }
  .is-embedded-map .domain-filters { display: flex; width: max-content; }
  .is-embedded-map .domain-filter { width: auto; }
  .is-embedded-map .layout-mode-toggle { width: 104px; margin: 0 3px 0 0; }
  .is-embedded-map .map-hud { right: .65rem; bottom: .65rem; left: auto; display: grid; width: min(264px,calc(100vw - 1.3rem)); padding: .65rem .72rem; opacity: 1; }
}