:root {
  --paper: #f6f2e9;
  --paper-deep: #ece5d8;
  --card: #fffdf8;
  --ink: #25231f;
  --muted: #6e695e;
  --accent: #918766;
  --accent-dark: #665e48;
  --accent-soft: #ded7c7;
  --line: #d9d1c1;
  --success: #2f6b4f;
  --success-soft: #e4f0e8;
  --danger: #9a3e3e;
  --danger-soft: #f7e8e6;
  --focus: #2f5d91;
  --shadow: 0 18px 50px rgba(57, 49, 35, .12);
  --radius: 22px;
  --header-h: 82px;
  --footer-h: 74px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--paper); }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 5%, rgba(145,135,102,.13), transparent 32rem),
    radial-gradient(circle at 92% 88%, rgba(145,135,102,.09), transparent 30rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
button, input, textarea, select { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 72%, white);
  outline-offset: 3px;
}
a { color: var(--accent-dark); }
img { max-width: 100%; display: block; }
[hidden] { display: none !important; }

.course-shell { min-height: 100vh; display: grid; grid-template-rows: auto 1fr auto; }
.course-header {
  position: sticky; top: 0; z-index: 30;
  min-height: var(--header-h);
  display: grid;
  grid-template-columns: auto minmax(0,1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 12px clamp(16px,3vw,42px) 16px;
  background: rgba(246,242,233,.92);
  border-bottom: 1px solid rgba(145,135,102,.25);
  backdrop-filter: blur(14px);
}
.header-brand { min-width: 0; line-height: 1.15; }
.header-brand strong { display: block; font-family: "Cormorant", Georgia, "Times New Roman", serif; font-size: clamp(1.05rem,2vw,1.42rem); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-kicker { display: block; color: var(--accent-dark); font-size: .73rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.header-status { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: .9rem; }
.learner-label { max-width: 180px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.score-label { min-width: 64px; padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); font-weight: 800; text-align: center; }
.header-progress { position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: var(--accent-soft); overflow: hidden; }
.progress-bar { display: block; width: 0; height: 100%; background: var(--accent); transition: width .3s ease; }
.icon-button { display: inline-grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: var(--card); cursor: pointer; font-size: 1.45rem; box-shadow: 0 6px 18px rgba(57,49,35,.08); }

.course-main { width: min(1180px, 100%); margin: 0 auto; padding: clamp(24px,4vw,56px) clamp(16px,4vw,44px); min-height: calc(100vh - var(--header-h) - var(--footer-h)); }
.course-main > .screen { animation: enter .32s ease both; }
@keyframes enter { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: translateY(0); } }

.course-footer {
  position: sticky; bottom: 0; z-index: 25;
  min-height: var(--footer-h);
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px clamp(14px,3vw,38px);
  background: rgba(246,242,233,.94);
  border-top: 1px solid rgba(145,135,102,.25);
  backdrop-filter: blur(14px);
}
.screen-label { justify-self: center; color: var(--muted); font-size: .86rem; }
.button {
  min-height: 44px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}
.button:hover { transform: translateY(-1px); }
.button:disabled { opacity: .42; cursor: not-allowed; transform: none; }
.button.primary { background: var(--accent-dark); color: white; box-shadow: 0 8px 22px rgba(83,75,54,.2); }
.button.secondary { background: var(--card); border-color: var(--line); }
.button.ghost { background: transparent; border-color: transparent; color: var(--accent-dark); }
.button.success { background: var(--success); color: white; }
.button.danger { background: var(--danger); color: white; }
.text-button { border: 0; background: transparent; padding: 8px; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.text-button.danger { color: var(--danger); }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 24px; }

.card { background: rgba(255,253,248,.96); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.content-card { padding: clamp(22px,4vw,48px); }
.eyebrow { color: var(--accent-dark); font-size: .78rem; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
h1,h2,h3 { margin: 0; font-family: "Cormorant", Georgia, "Times New Roman", serif; line-height: 1.13; }
h1 { font-size: clamp(2.2rem,6vw,5rem); font-weight: 500; }
h2 { font-size: clamp(1.7rem,3.6vw,2.8rem); font-weight: 500; }
h3 { font-size: clamp(1.08rem,2.3vw,1.42rem); }
p { margin: 0 0 1em; }
.lead { max-width: 780px; color: var(--muted); font-size: clamp(1.03rem,2vw,1.25rem); }
.muted { color: var(--muted); }
.small { font-size: .9rem; }

.title-screen, .section-screen { min-height: min(670px, calc(100vh - 200px)); display: grid; place-items: center; text-align: center; overflow: hidden; position: relative; }
.title-screen::before, .section-screen::before { content:""; position:absolute; inset: 18px; border: 1px solid rgba(145,135,102,.34); border-radius: calc(var(--radius) - 6px); pointer-events:none; }
.title-inner, .section-inner { position: relative; z-index: 1; width: min(820px, 92%); padding: 44px 20px; }
.title-crest { width: clamp(105px,18vw,190px); margin: 0 auto 24px; filter: drop-shadow(0 10px 12px rgba(61,53,38,.14)); }
.title-screen h1 { margin-bottom: 10px; }
.title-rule { width: 140px; height: 1px; background: var(--accent); margin: 22px auto; position: relative; }
.title-rule::after { content:"◆"; position:absolute; left:50%; top:50%; transform:translate(-50%,-52%); padding:0 10px; color:var(--accent); background:var(--card); font-size:.72rem; }
.section-screen h1 { font-size: clamp(2.25rem,6vw,4.7rem); }
.section-screen .title-crest { width: clamp(85px,14vw,145px); }

.form-card { max-width: 760px; margin: 0 auto; }
.field-label { display:block; margin-bottom:8px; font-weight:800; }
.text-input, .text-area, .select-input {
  width: 100%; border: 1px solid var(--line); border-radius: 14px; background: white; color: var(--ink); padding: 14px 16px;
}
.text-input { min-height: 52px; font-size: 1.08rem; }
.text-area { min-height: 190px; resize: vertical; line-height: 1.65; }
.field-note { display:flex; justify-content:space-between; gap:14px; margin-top:7px; color:var(--muted); font-size:.86rem; }

.toc-grid, .exercise-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; margin-top: 26px; }
.toc-card, .exercise-card { text-align:left; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); cursor: pointer; min-height: 160px; display:flex; flex-direction:column; transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease; }
.toc-card:hover, .exercise-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 14px 28px rgba(57,49,35,.1); }
.toc-card h3, .exercise-card h3 { margin-bottom:9px; }
.toc-card p, .exercise-card p { color:var(--muted); font-size:.91rem; flex:1; }
.card-progress { height: 5px; border-radius: 999px; background: var(--accent-soft); overflow:hidden; margin-top:16px; }
.card-progress span { display:block; height:100%; background:var(--accent); }

.info-banner { display:flex; gap:14px; align-items:flex-start; padding:16px 18px; border:1px solid var(--line); background:var(--paper); border-radius:16px; margin:20px 0; }
.info-icon { width:30px; height:30px; flex:0 0 auto; display:grid; place-items:center; border-radius:50%; background:var(--accent-soft); color:var(--accent-dark); font-weight:900; }
.external-card { max-width: 850px; margin: 0 auto; }
.external-steps { display:grid; gap:12px; counter-reset: step; margin:24px 0; }
.external-step { position:relative; padding:15px 16px 15px 54px; border:1px solid var(--line); border-radius:15px; background:var(--paper); }
.external-step::before { counter-increment:step; content:counter(step); position:absolute; left:15px; top:13px; width:28px; height:28px; display:grid; place-items:center; border-radius:50%; background:var(--accent-dark); color:white; font-weight:800; }

.glossary-grid { display:grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap:12px; margin-top:24px; }
details.glossary-item { border:1px solid var(--line); border-radius:15px; background:var(--card); overflow:hidden; }
details.glossary-item summary { cursor:pointer; list-style:none; padding:15px 18px; font-weight:850; color:var(--accent-dark); }
details.glossary-item summary::-webkit-details-marker { display:none; }
details.glossary-item summary::after { content:"+"; float:right; }
details.glossary-item[open] summary::after { content:"−"; }
details.glossary-item p { padding:0 18px 16px; margin:0; color:var(--muted); }

.story-layout { display:grid; grid-template-columns: minmax(0,1.45fr) minmax(260px,.7fr); gap:24px; align-items:start; }
.story-copy { padding: clamp(22px,3vw,42px); }
.story-toolbar { display:flex; flex-wrap:wrap; gap:9px; justify-content:space-between; align-items:center; padding-bottom:17px; border-bottom:1px solid var(--line); margin-bottom:20px; }
.story-text { font-family: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: clamp(1rem,1.6vw,1.17rem); line-height:1.85; }
.story-text p { margin-bottom:1.05em; }
.story-images { display:grid; gap:20px; align-content:start; }
.story-image-frame { margin:0; display:grid; gap:8px; min-width:0; overflow:hidden; border-radius:18px; }
.story-image-frame figcaption { color:var(--muted); font-size:.82rem; text-align:center; }
.story-image-main { aspect-ratio: 4 / 5; width:100%; object-fit:cover; border-radius:18px; border:1px solid var(--line); box-shadow:var(--shadow); }
.story-image-main.landscape { aspect-ratio: 4 / 3; }
.story-image-main.route { aspect-ratio: 16 / 9; object-fit:cover; }
.story-image-main.natural { aspect-ratio:auto; height:auto; object-fit:contain; }
.vocab-term { display:inline; border:0; background:transparent; padding:0; margin:0; font:inherit; color:var(--accent-dark); font-weight:800; text-decoration:underline dotted; text-underline-offset:3px; cursor:pointer; }
.story-reference { margin-top:22px; }
.story-reference summary { cursor:pointer; color:var(--accent-dark); font-weight:800; }
.story-reference .story-text { max-height:330px; overflow:auto; margin-top:14px; padding:18px; background:var(--paper); border-radius:14px; }


.story-audio-player {
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}
.story-audio-player audio { display: none; }
.story-audio-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.story-audio-controls .button { min-height: 44px; padding: 9px 15px; }
.story-audio-play { min-width: 104px; }
.story-audio-play [data-audio-play-icon] {
  display: inline-grid;
  place-items: center;
  width: 18px;
  font-size: .86rem;
}
.story-audio-speed-label {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 6px 5px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--accent-dark);
  font-size: .88rem;
  font-weight: 800;
}
.story-audio-speed {
  min-height: 32px;
  padding: 4px 28px 4px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
}
.story-audio-progress-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}
.story-audio-progress {
  width: 100%;
  min-width: 0;
  height: 44px;
  margin: 0;
  accent-color: var(--accent-dark);
  cursor: pointer;
}
.story-audio-progress:disabled { cursor: wait; opacity: .55; }
.story-audio-time {
  min-width: 98px;
  color: var(--muted);
  font-size: .84rem;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  text-align: right;
  white-space: nowrap;
}
.story-audio-status {
  min-height: 1.25em;
  margin: 0;
  color: var(--muted);
  font-size: .8rem;
}

.question-card { max-width: 920px; margin: 0 auto; }
.question-number { color:var(--accent-dark); font-size:.82rem; font-weight:850; text-transform:uppercase; letter-spacing:.12em; }
.question-title { margin:10px 0 24px; font-family:"Cormorant",Georgia,"Times New Roman",serif; font-size:clamp(1.35rem,3vw,2.15rem); }
.option-list { display:grid; gap:11px; }
.option-label { position:relative; display:grid; grid-template-columns:auto 1fr; gap:13px; align-items:flex-start; padding:15px 17px; border:1px solid var(--line); border-radius:15px; background:white; cursor:pointer; transition:border-color .15s ease, background .15s ease; }
.option-label:hover { border-color:var(--accent); }
.option-label:has(input:checked) { border-color:var(--accent-dark); background:#f3efe4; }
.option-label.correct { border-color:var(--success); background:var(--success-soft); }
.option-label.incorrect { border-color:var(--danger); background:var(--danger-soft); }
.option-label input { margin-top:4px; width:18px; height:18px; accent-color:var(--accent-dark); }
.feedback { margin-top:18px; padding:15px 17px; border-radius:15px; border:1px solid var(--line); }
.feedback.success { background:var(--success-soft); border-color:color-mix(in srgb,var(--success) 40%,white); }
.feedback.error { background:var(--danger-soft); border-color:color-mix(in srgb,var(--danger) 40%,white); }
.feedback strong { display:block; margin-bottom:4px; }

.word-options { display:flex; flex-wrap:wrap; gap:10px; margin:20px 0; }
.word-chip { min-width:110px; padding:12px 18px; border:1px solid var(--line); border-radius:999px; background:white; font-weight:800; cursor:pointer; }
.word-chip:hover, .word-chip.selected { border-color:var(--accent-dark); background:var(--paper-deep); }
.sentence-frame { padding:24px; border:1px solid var(--line); background:var(--paper); border-radius:17px; font-family:"Inter",ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; font-size:clamp(1.18rem,2.7vw,1.7rem); }
.blank-display { display:inline-block; min-width:120px; border-bottom:2px solid var(--accent-dark); color:var(--accent-dark); font-weight:800; text-align:center; }

.multi-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; margin-top:24px; }
.multi-item { padding:18px; border:1px solid var(--line); border-radius:16px; background:white; }
.multi-item.correct { border-color:var(--success); background:var(--success-soft); }
.multi-item.incorrect { border-color:var(--danger); background:var(--danger-soft); }
.multi-prompt { min-height:52px; margin-bottom:13px; font-family:"Inter",ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; font-size:1.08rem; }

.sentence-choice-grid { align-items:start; }
.sentence-choice-item { display:flex; flex-direction:column; }
.sentence-clue { margin:9px 0 12px; color:var(--muted); font-weight:700; line-height:1.55; }
.multi-sentence, .game-sentence { padding:18px; font-size:clamp(1.05rem,2vw,1.3rem); line-height:1.55; }
.sentence-choice-item .word-options, .game-sentence + .word-options { margin:14px 0 0; }
.sentence-choice-item .feedback { margin-top:14px; }
.game-try-again { margin:10px 0 0; color:var(--danger); font-weight:750; }

.model-answer { margin-top:22px; border:1px solid var(--line); border-radius:16px; background:var(--paper); overflow:hidden; }
.model-answer summary { cursor:pointer; list-style:none; padding:15px 18px; color:var(--accent-dark); font-weight:850; }
.model-answer summary::-webkit-details-marker { display:none; }
.model-answer summary::after { content:"+"; float:right; }
.model-answer[open] summary { border-bottom:1px solid var(--line); }
.model-answer[open] summary::after { content:"−"; }
.model-answer-body { padding:20px; }
.model-answer-body h3 { margin:20px 0 10px; color:var(--accent-dark); }
.model-answer-body h4 { margin:20px 0 9px; font-size:1rem; }
.model-answer-copy { padding:17px 18px; border:1px solid var(--line); border-radius:14px; background:var(--card); font-family:"Inter",ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; line-height:1.72; }
.model-answer-copy p:last-child { margin-bottom:0; }
.model-answer-note { display:grid; gap:4px; padding:14px 16px; border-left:4px solid var(--accent); background:var(--card); color:var(--muted); }
.model-answer-note strong { color:var(--ink); }
.model-answer-analysis { margin:0; padding-left:20px; }
.model-answer-analysis li { margin:8px 0; line-height:1.55; }
.mini-model-answer { margin-top:12px; border-top:1px solid var(--line); padding-top:10px; }
.mini-model-answer summary { cursor:pointer; color:var(--accent-dark); font-weight:800; }
.mini-model-answer p { margin:10px 0 0; padding:12px 14px; border-radius:12px; background:var(--paper); line-height:1.6; }

.flashcard-grid { display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:14px; margin-top:24px; }
.flashcard-grid.six-cards { grid-template-columns:repeat(3,minmax(0,1fr)); }
.flashcard { perspective:1000px; min-height:340px; height:360px; border:0; background:transparent; padding:0; cursor:pointer; text-align:left; }
.flashcard-inner { display:block; position:relative; width:100%; height:100%; min-height:340px; transform-style:preserve-3d; transition:transform .55s ease; }
.flashcard.flipped .flashcard-inner { transform:rotateY(180deg); }
.flashcard-face { display:block; position:absolute; inset:0; backface-visibility:hidden; border:1px solid var(--line); border-radius:18px; overflow:hidden; background:var(--card); box-shadow:0 12px 30px rgba(57,49,35,.1); }
.flashcard-front { display:flex; flex-direction:column; }
.flashcard-front img { width:100%; height:245px; object-fit:cover; }
.flashcard-word { padding:16px; text-align:center; font-family:"Cormorant",Georgia,"Times New Roman",serif; font-size:1.35rem; }
.flashcard-back { transform:rotateY(180deg); padding:20px; overflow:auto; }
.flashcard-back h3 { color:var(--accent-dark); margin-bottom:4px; }
.flashcard-back .part { color:var(--muted); font-size:.85rem; font-weight:800; text-transform:uppercase; }
.flashcard-back ul { padding-left:18px; }
.flashcard-hint { text-align:center; color:var(--muted); font-size:.88rem; margin-top:14px; }

.game-tabs { display:flex; flex-wrap:wrap; gap:8px; margin:22px 0; border-bottom:1px solid var(--line); padding-bottom:12px; }
.game-tab { border:1px solid var(--line); background:white; border-radius:999px; padding:10px 16px; cursor:pointer; font-weight:800; }
.game-tab.active { background:var(--accent-dark); color:white; border-color:var(--accent-dark); }
.game-panel { min-height:460px; }
.game-hero { display:grid; grid-template-columns:minmax(0,1fr) minmax(240px,.55fr); gap:22px; align-items:center; }
.game-image { border-radius:17px; border:1px solid var(--line); }

.game-image-link { display:block; align-self:start; color:var(--accent-dark); text-decoration:none; border-radius:17px; }
.game-image-link:hover .game-image { transform:translateY(-2px); box-shadow:0 14px 28px rgba(57,49,35,.14); }
.game-image-link:focus-visible { outline:3px solid var(--accent-soft); outline-offset:4px; }
.game-image-link .game-image { width:100%; transition:transform .16s ease, box-shadow .16s ease; }
.game-image-caption { display:flex; justify-content:center; gap:7px; margin-top:9px; font-weight:850; text-align:center; }
.word-search-wrap aside .game-image-link { margin-top:20px; }
.game-score { display:inline-flex; padding:8px 12px; border-radius:999px; background:var(--paper-deep); font-weight:800; }
.word-search-wrap { display:grid; grid-template-columns:minmax(430px,1fr) minmax(180px,.35fr); gap:24px; align-items:start; }
.word-search { display:grid; grid-template-columns:repeat(14,minmax(22px,1fr)); gap:3px; user-select:none; touch-action:manipulation; }
.letter-cell { aspect-ratio:1; min-width:0; display:grid; place-items:center; border:1px solid var(--line); border-radius:5px; background:white; padding:0; font-size:clamp(.68rem,1.55vw,1rem); font-weight:800; cursor:pointer; }
.letter-cell.start { background:var(--accent-soft); border-color:var(--accent-dark); }
.letter-cell.found { background:var(--success-soft); border-color:var(--success); color:var(--success); }
.word-list { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; }
.word-list span { padding:7px 9px; border-radius:8px; background:var(--paper); text-transform:uppercase; font-weight:800; font-size:.85rem; }
.word-list span.found { text-decoration:line-through; color:var(--success); background:var(--success-soft); }

.garden-layout { display:grid; grid-template-columns:minmax(0,1.45fr) minmax(240px,.55fr); gap:22px; align-items:start; }
.garden-panel { border:1px solid var(--line); border-radius:17px; background:white; overflow:hidden; }
.garden-panel img { display:block; width:100%; height:auto; min-height:0; object-fit:contain; background:transparent; }
.garden-controls { padding:18px; }
.garden-counter { color:var(--muted); font-weight:800; }
.garden-overview { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:9px; }
.garden-jump { padding:11px; border:1px solid var(--line); background:white; border-radius:11px; cursor:pointer; text-align:left; }
.garden-jump.current { border-color:var(--accent-dark); background:var(--paper-deep); }
.garden-jump.correct { border-color:var(--success); background:var(--success-soft); }

.sentence-practice-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; margin-top:22px; }
.sentence-practice-item { padding:16px; border:1px solid var(--line); border-radius:15px; background:white; }
.sentence-practice-item textarea { min-height:105px; }
.word-picker { display:flex; flex-wrap:wrap; gap:9px; margin:20px 0; }
.word-picker button { border:1px solid var(--line); border-radius:999px; background:white; padding:9px 14px; font-weight:800; cursor:pointer; }
.word-picker button.selected { background:var(--accent-dark); color:white; border-color:var(--accent-dark); }

.results-grid { display:grid; grid-template-columns:minmax(260px,.55fr) minmax(0,1fr); gap:24px; margin-top:24px; }
.score-ring { width:min(280px,70vw); aspect-ratio:1; margin:0 auto; border-radius:50%; display:grid; place-items:center; background:conic-gradient(var(--accent-dark) var(--score-angle), var(--accent-soft) 0); position:relative; }
.score-ring::before { content:""; position:absolute; inset:18px; border-radius:50%; background:var(--card); }
.score-ring-content { position:relative; text-align:center; }
.score-ring strong { display:block; font-family:"Inter",ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; font-size:3.4rem; line-height:1; }
.breakdown-list { display:grid; gap:10px; }
.breakdown-row { display:grid; grid-template-columns:1fr auto; gap:12px; align-items:center; padding:13px 15px; border:1px solid var(--line); border-radius:13px; background:white; }
.review-list { display:flex; flex-wrap:wrap; gap:8px; margin-top:16px; }
.review-button { border:1px solid var(--line); border-radius:999px; background:white; padding:8px 12px; cursor:pointer; }

.certificate-wrap { padding:clamp(16px,3vw,34px); }
.certificate { position:relative; min-height:650px; padding:clamp(40px,7vw,86px); text-align:center; border:7px double var(--accent); background:var(--card); overflow:hidden; }
.certificate::before { content:""; position:absolute; inset:17px; border:1px solid var(--accent-soft); pointer-events:none; }
.certificate-crest { width:110px; margin:0 auto 18px; }
.certificate h1 { font-size:clamp(2.2rem,5vw,4.1rem); color:var(--accent-dark); }
.certificate-name { margin:28px auto 9px; max-width:720px; padding-bottom:8px; border-bottom:1px solid var(--accent); font-family:"Cormorant",Georgia,"Times New Roman",serif; font-size:clamp(1.8rem,4vw,3rem); }
.certificate-course { font-family:"Cormorant",Georgia,"Times New Roman",serif; font-size:1.35rem; }
.certificate-copy { max-width:760px; margin:24px auto; color:var(--muted); }
.certificate-meta { display:flex; justify-content:space-between; gap:20px; max-width:720px; margin:48px auto 0; }
.certificate-meta div { flex:1; padding-top:8px; border-top:1px solid var(--accent); }
.certificate.locked { filter:grayscale(.4); }
.certificate-lock { position:absolute; inset:0; z-index:4; display:grid; place-items:center; background:rgba(246,242,233,.88); padding:30px; }
.certificate-lock-box { max-width:520px; padding:26px; border:1px solid var(--line); border-radius:18px; background:var(--card); box-shadow:var(--shadow); }

.toc-drawer { position:fixed; inset:0 auto 0 0; z-index:60; width:min(430px,92vw); padding:24px; background:var(--card); border-right:1px solid var(--line); box-shadow:20px 0 60px rgba(37,35,31,.2); transform:translateX(-105%); transition:transform .25s ease; overflow:auto; }
.toc-drawer.open { transform:translateX(0); }
.drawer-backdrop { position:fixed; inset:0; z-index:55; background:rgba(27,25,21,.42); backdrop-filter:blur(2px); }
.drawer-head { display:flex; justify-content:space-between; align-items:flex-start; gap:12px; padding-bottom:16px; border-bottom:1px solid var(--line); }
.drawer-content-section { margin:15px 0; }
.drawer-link { width:100%; display:grid; grid-template-columns:auto 1fr auto; gap:11px; align-items:center; padding:11px; border:0; border-radius:12px; background:transparent; text-align:left; cursor:pointer; }
.drawer-link:hover, .drawer-link.current { background:var(--paper); }
.drawer-index { width:28px; height:28px; display:grid; place-items:center; border-radius:50%; border:1px solid var(--line); font-size:.78rem; }
.drawer-link.visited .drawer-index { background:var(--accent-dark); color:white; border-color:var(--accent-dark); }
.drawer-section-title { margin-top:20px; padding:0 10px 6px; color:var(--accent-dark); font-size:.72rem; font-weight:900; letter-spacing:.13em; text-transform:uppercase; }
.drawer-actions { display:grid; gap:10px; margin-top:24px; padding-top:20px; border-top:1px solid var(--line); }

.toast { position:fixed; left:50%; bottom:95px; z-index:90; transform:translate(-50%,20px); opacity:0; pointer-events:none; max-width:min(540px,90vw); padding:13px 17px; border-radius:999px; background:#292721; color:white; box-shadow:var(--shadow); transition:opacity .2s ease, transform .2s ease; text-align:center; }
.toast.show { opacity:1; transform:translate(-50%,0); }
.glossary-backdrop {
  position: fixed;
  inset: 0;
  z-index: 94;
  background: rgba(37,35,31,.38);
  backdrop-filter: blur(2px);
}
body.glossary-modal-open { overflow: hidden; }
.glossary-popover {
  position: fixed;
  z-index: 95;
  width: min(420px, calc(100vw - 28px));
  max-height: calc(100vh - var(--header-h) - var(--footer-h) - 28px);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 24px 70px rgba(57,49,35,.25);
  overflow: auto;
  overscroll-behavior: contain;
}
.glossary-card-head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 18px 13px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 95%, var(--paper));
}
.glossary-kicker {
  display: block;
  margin-bottom: 2px;
  color: var(--accent-dark);
  font-size: .7rem;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.glossary-popover h3 {
  margin: 0;
  color: var(--accent-dark);
  font-family: "Cormorant", Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  line-height: 1.05;
  text-transform: none;
}
.glossary-close {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-size: 1.45rem;
  line-height: 1;
}
.glossary-card-body { padding: 18px; }
.glossary-definition {
  margin: 0;
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.65;
}
.glossary-visual-toggle {
  width: 100%;
  margin-top: 17px;
}
.glossary-visual {
  margin: 16px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--paper);
}
.glossary-visual img {
  width: 100%;
  height: auto;
  max-height: 390px;
  object-fit: contain;
  background: var(--paper-deep);
}
.glossary-visual figcaption {
  padding: 10px 13px 12px;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.45;
  text-align: left;
}
.glossary-popover.mode-side {
  top: calc(var(--header-h) + 14px + env(safe-area-inset-top, 0px));
  right: max(16px, env(safe-area-inset-right, 0px));
  bottom: calc(var(--footer-h) + 14px + env(safe-area-inset-bottom, 0px));
  left: auto;
  width: min(400px, calc(100vw - 32px));
  max-height: none;
}
.glossary-popover.mode-sheet {
  inset: auto 0 0 0;
  width: 100%;
  max-height: min(82vh, 760px);
  border-width: 1px 0 0;
  border-radius: 24px 24px 0 0;
  padding-bottom: max(10px, env(safe-area-inset-bottom, 0px));
  animation: glossary-sheet-in .2s ease both;
}
.glossary-popover.mode-sheet .glossary-card-head {
  padding-top: 19px;
}
.glossary-popover.mode-sheet .glossary-visual img {
  max-height: 46vh;
}
@keyframes glossary-sheet-in {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.noscript { padding:20px; background:var(--danger-soft); color:var(--danger); text-align:center; font-weight:800; }

@media (max-width: 980px) {
  .toc-grid, .exercise-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .flashcard-grid, .flashcard-grid.six-cards { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .garden-layout, .results-grid, .game-hero, .word-search-wrap { grid-template-columns:1fr; }
  .garden-overview { grid-template-columns:repeat(5,minmax(0,1fr)); }
}

/* Tablet story layout: preserve the desktop reading relationship on iPad.
   The complete illustration sequence remains in a vertical rail beside the text
   instead of moving beneath the entire passage. */
@media (min-width: 701px) and (max-width: 980px) {
  .story-layout {
    grid-template-columns: minmax(0,1.35fr) minmax(220px,.68fr);
    gap:18px;
  }
  .story-copy { padding:24px; }
  .story-toolbar { align-items:flex-start; gap:12px; }
  .story-toolbar > div:first-child { min-width:0; }
  .story-toolbar .button-row { flex:0 0 auto; gap:5px; }
  .story-toolbar .button { min-height:40px; padding:8px 12px; }
  .story-audio-player { padding:13px; }
  .story-audio-controls { gap:6px; }
  .story-audio-controls .button { min-height:42px; padding:8px 11px; }
  .story-audio-speed-label { flex:1 1 150px; justify-content:space-between; }
  .story-audio-progress-row { grid-template-columns:1fr; gap:2px; }
  .story-audio-time { justify-self:start; text-align:left; }
  .story-text { font-size:1rem; line-height:1.72; }
  .story-images { grid-template-columns:1fr; gap:16px; min-width:0; }
  .story-image-main { border-radius:15px; }
  .story-image-frame figcaption { font-size:.74rem; }
}

@media (max-width: 700px) {
  .story-layout { grid-template-columns:1fr; }
  .story-images { grid-template-columns:minmax(0,520px); justify-content:center; }
}

@media (max-width: 680px) {
  :root { --header-h:72px; --footer-h:70px; }
  .course-header { grid-template-columns:auto minmax(0,1fr) auto; gap:10px; padding-inline:12px; }
  .header-status .learner-label { display:none; }
  .course-main { padding:22px 12px; }
  .course-footer { grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1fr); gap:4px; padding:9px 8px; max-width:100vw; overflow:hidden; }
  .course-footer .screen-label { display:none; }
  .course-footer #home-button { order:2; }
  .course-footer #next-button { order:3; }
  .nav-button { width:100%; min-width:0; padding-inline:6px; font-size:.88rem; }
  .toc-grid, .exercise-grid, .glossary-grid, .multi-grid, .sentence-practice-grid { grid-template-columns:1fr; }
  .multi-sentence, .game-sentence { padding:15px; }
  .model-answer-body { padding:16px; }
  .model-answer-copy { padding:14px; }
  .flashcard-grid, .flashcard-grid.six-cards { grid-template-columns:1fr; }
  .flashcard, .flashcard-inner { min-height:420px; height:420px; }
  .flashcard-front img { height:315px; }
  .content-card { padding:22px 17px; }
  .story-audio-player { padding:13px 12px; margin-bottom:20px; }
  .story-audio-controls { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); }
  .story-audio-controls .button { width:100%; min-width:0; padding-inline:8px; }
  .story-audio-play { min-width:0; }
  .story-audio-speed-label { grid-column:1 / -1; width:100%; justify-content:space-between; border-radius:14px; }
  .story-audio-progress-row { grid-template-columns:1fr; gap:0; }
  .story-audio-time { justify-self:start; text-align:left; }
  .title-screen, .section-screen { min-height:calc(100vh - 190px); }
  .garden-overview { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .word-search { grid-template-columns:repeat(14,minmax(18px,1fr)); gap:2px; }
  .letter-cell { border-radius:3px; font-size:.64rem; }
  .certificate { padding:50px 22px; }
  .certificate-meta { flex-direction:column; }
  .learner-label { display:none; }
}


@media (max-width: 360px) {
  .word-search { grid-template-columns:repeat(14,minmax(0,1fr)); width:100%; min-width:0; gap:2px; }
  .letter-cell { min-width:0; width:auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior:auto !important; animation-duration:.001ms !important; transition-duration:.001ms !important; }
}

@media print {
  body { background:white; }
  .course-header, .course-footer, .button-row, .toc-drawer, .drawer-backdrop, .toast, .glossary-backdrop, .glossary-popover { display:none !important; }
  .course-main { width:100%; padding:0; }
  .certificate-wrap, .certificate { box-shadow:none; border-color:#756c52; }
  .certificate { min-height:95vh; page-break-inside:avoid; }
  .certificate-lock { display:none !important; }
}


/* Unit-adaptive story and sentence-completion layouts */
.story-layout.no-story-images {
  grid-template-columns: minmax(0, 1fr);
  width: min(980px, 100%);
  margin-inline: auto;
}
.story-layout.no-story-images .story-copy { min-width: 0; }
.completion-list {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}
.completion-list-item {
  padding: clamp(18px, 2.5vw, 28px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: white;
}
.completion-list-item.correct {
  border-color: var(--success);
  background: var(--success-soft);
}
.completion-list-item.incorrect {
  border-color: var(--danger);
}
.completion-list-item .sentence-frame { margin-top: 12px; }
.completion-list-item .button-row { margin-bottom: 0; }

@media (max-width: 680px) {
  .completion-list-item { padding: 16px; }
}

/* Standalone test v1.1: visual clues inside Reading Helper glossary cards. */
.glossary-helper-actions { padding: 0 18px 14px; }
.glossary-helper-visual-toggle { width: 100%; justify-content: center; }
.glossary-helper-visual {
  margin: 0 18px 18px;
  max-width: none;
  border-radius: 14px;
  overflow: hidden;
  background: var(--paper);
}
.glossary-helper-visual img {
  display: block;
  width: 100%;
  max-height: 360px;
  object-fit: contain;
  background: var(--paper);
}
.glossary-helper-visual figcaption { padding: 10px 12px 12px; }
@media (max-width: 700px) {
  .glossary-helper-visual img { max-height: 300px; }
}



/* Integrated diagnostic and mastery assessments */
.assessment-card { max-width: 980px; margin: 0 auto; }
.assessment-heading { display:flex; align-items:flex-start; justify-content:space-between; gap:24px; }
.assessment-count { min-width:128px; display:grid; justify-items:center; padding:12px 16px; border:1px solid var(--line); border-radius:16px; background:var(--paper); }
.assessment-count strong { font-family:"Cormorant",Georgia,"Times New Roman",serif; color:var(--accent-dark); font-size:2rem; line-height:1; }
.assessment-count span { margin-top:4px; color:var(--muted); font-size:.78rem; font-weight:750; }
.assessment-progress-meta { display:flex; justify-content:space-between; gap:18px; margin-top:24px; color:var(--muted); font-size:.86rem; font-weight:750; }
.assessment-progress-track { height:8px; margin-top:8px; border-radius:999px; background:var(--accent-soft); overflow:hidden; }
.assessment-progress-track span { display:block; height:100%; border-radius:inherit; background:var(--accent-dark); transition:width .24s ease; }
.assessment-jump-grid { display:grid; grid-template-columns:repeat(12,minmax(34px,1fr)); gap:7px; margin:20px 0; }
.assessment-jump { min-height:38px; border:1px solid var(--line); border-radius:10px; background:var(--card); color:var(--muted); cursor:pointer; font-weight:850; }
.assessment-jump:hover { border-color:var(--accent); }
.assessment-jump.answered { background:var(--paper-deep); color:var(--accent-dark); }
.assessment-jump.current { border-color:var(--accent-dark); box-shadow:0 0 0 2px color-mix(in srgb,var(--accent-dark) 18%,transparent); }
.assessment-jump.locked-correct { background:var(--success-soft); border-color:color-mix(in srgb,var(--success) 45%,var(--line)); color:var(--success); }
.assessment-question-shell { padding:clamp(20px,3vw,32px); border:1px solid var(--line); border-radius:20px; background:var(--paper); }
.assessment-question-title { margin:9px 0 22px; font-size:clamp(1.35rem,2.5vw,2rem); }
.assessment-context { margin-bottom:22px; padding:18px 20px; border-left:4px solid var(--accent); border-radius:0 14px 14px 0; background:var(--card); }
.assessment-context p { margin:8px 0 0; line-height:1.75; }
.assessment-options .option-label.selected { border-color:var(--accent-dark); background:color-mix(in srgb,var(--accent-soft) 46%,var(--card)); }
.assessment-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:22px; }
.assessment-actions .button.primary { margin-left:auto; }
.assessment-submit-note { margin:12px 0 0; color:var(--muted); font-size:.88rem; }
.assessment-submit-note.ready { color:var(--success); font-weight:750; }
.assessment-result-grid { display:grid; grid-template-columns:minmax(230px,.6fr) minmax(0,1.4fr); gap:28px; align-items:center; margin-top:26px; }
.assessment-score-ring { width:min(250px,65vw); }
.assessment-score-caption { margin:14px 0 0; text-align:center; color:var(--muted); font-weight:800; }
.assessment-status { display:flex; align-items:flex-start; gap:14px; padding:18px; border:1px solid var(--line); border-radius:16px; background:var(--paper); }
.assessment-status.success { border-color:color-mix(in srgb,var(--success) 40%,var(--line)); background:var(--success-soft); }
.assessment-status.warning { border-color:color-mix(in srgb,var(--danger) 34%,var(--line)); background:var(--danger-soft); }
.assessment-status.guidance { border-color:var(--accent); background:var(--paper-deep); }
.assessment-status-icon { width:34px; height:34px; flex:0 0 auto; display:grid; place-items:center; border-radius:50%; background:var(--accent-dark); color:white; font-weight:900; }
.assessment-status.success .assessment-status-icon { background:var(--success); }
.assessment-status.warning .assessment-status-icon { background:var(--danger); }
.assessment-status p { margin:5px 0 0; color:var(--muted); }
.assessment-summary-list { display:grid; gap:9px; margin-top:15px; }
.assessment-summary-list > div { display:grid; grid-template-columns:1fr auto; gap:14px; padding:12px 14px; border:1px solid var(--line); border-radius:12px; background:var(--card); }
.assessment-review-title { margin-top:30px; }
.assessment-review-list { display:grid; gap:10px; margin-top:14px; }
.assessment-review-item { border:1px solid var(--line); border-radius:14px; background:var(--card); overflow:hidden; }
.assessment-review-item summary { display:flex; justify-content:space-between; gap:14px; padding:14px 16px; cursor:pointer; list-style:none; }
.assessment-review-item summary::-webkit-details-marker { display:none; }
.assessment-review-item.incorrect summary strong { color:var(--danger); }
.assessment-review-item.correct summary strong { color:var(--success); }
.assessment-review-body { padding:0 16px 16px; border-top:1px solid var(--line); }
.assessment-review-body > p:first-child { margin-top:14px; font-weight:750; }
.assessment-answer-line { display:grid; grid-template-columns:minmax(110px,.35fr) 1fr; gap:12px; padding:10px 0; border-top:1px solid var(--line); }
.assessment-answer-line span { color:var(--muted); }
.assessment-summary-cards { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px; margin-top:14px; }
.assessment-summary-card { padding:20px; border:1px solid var(--line); border-radius:16px; background:var(--paper); }
.assessment-summary-card.complete { border-color:color-mix(in srgb,var(--success) 42%,var(--line)); background:var(--success-soft); }
.assessment-summary-card > strong { display:block; margin:10px 0 4px; color:var(--accent-dark); font-family:"Cormorant",Georgia,"Times New Roman",serif; font-size:2rem; }
.assessment-summary-card p { margin:0; color:var(--muted); }
.drawer-link.locked { opacity:.48; cursor:not-allowed; }
.drawer-link.locked:hover { background:transparent; }
.certificate-meta-three { max-width:860px; }
.certificate-requirements { margin:16px auto 0; padding-left:22px; text-align:left; color:var(--muted); }
.certificate-requirements li { margin:8px 0; }

@media (max-width: 980px) {
  .assessment-result-grid { grid-template-columns:1fr; }
  .assessment-summary-cards { grid-template-columns:1fr; }
}

@media (max-width: 700px) {
  .assessment-heading { flex-direction:column; }
  .assessment-count { min-width:0; width:100%; grid-template-columns:auto 1fr; justify-items:start; align-items:center; gap:10px; }
  .assessment-count strong { font-size:1.6rem; }
  .assessment-progress-meta { flex-direction:column; gap:3px; }
  .assessment-jump-grid { grid-template-columns:repeat(6,minmax(0,1fr)); }
  .assessment-actions { display:grid; grid-template-columns:1fr 1fr; }
  .assessment-actions .button { width:100%; }
  .assessment-actions .button.primary { grid-column:1 / -1; margin-left:0; }
  .assessment-answer-line { grid-template-columns:1fr; gap:3px; }
}

@media (max-width: 390px) {
  .assessment-jump-grid { grid-template-columns:repeat(4,minmax(0,1fr)); }
  .assessment-actions { grid-template-columns:1fr; }
  .assessment-actions .button.primary { grid-column:auto; }
}