:root {
  --cream: #f8f1e7;
  --paper: #fffdf8;
  --ink: #17263a;
  --muted: #6f746f;
  --coral: #e9684b;
  --coral-dark: #c94f36;
  --sage: #6e8f7f;
  --sage-pale: #dce8df;
  --line: #dfd7cb;
  --gold: #d6a849;
  --shadow: 0 18px 48px rgba(38, 40, 35, .09);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.55;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid rgba(233, 104, 75, .35);
  outline-offset: 3px;
}

.app-shell { min-height: 100vh; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid rgba(223, 215, 203, .85);
  background: rgba(248, 241, 231, .92);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; width: max-content; font-size: 22px; font-weight: 900; letter-spacing: -.6px; }
.brand em { color: var(--coral); font-style: normal; }
.brand-cup { position: relative; width: 30px; height: 26px; border: 3px solid var(--ink); border-radius: 4px 4px 11px 11px; }
.brand-cup::after { content: ""; position: absolute; right: -10px; top: 4px; width: 9px; height: 10px; border: 3px solid var(--ink); border-left: 0; border-radius: 0 10px 10px 0; }
.brand-cup::before { content: ""; position: absolute; left: 5px; top: -11px; width: 3px; height: 7px; border-radius: 5px; background: var(--coral); box-shadow: 8px -2px 0 var(--sage); }
.nav { display: flex; align-items: center; gap: 4px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255, 253, 248, .7); }
.nav a { min-width: 76px; padding: 8px 17px; border-radius: 999px; color: var(--muted); text-align: center; font-size: 14px; font-weight: 800; }
.nav a.active { background: var(--ink); color: white; }
.header-progress { justify-self: end; display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 800; }
.header-progress i { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--sage-pale); color: #315c4c; font-style: normal; }

.page { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 52px 0 86px; }
.eyebrow { margin: 0 0 10px; color: var(--coral-dark); font-size: 12px; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.mini-label { color: var(--muted); font-size: 11px; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
.soft-badge, .level-pill, .status-pill { display: inline-flex; align-items: center; min-height: 28px; padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 900; }
.soft-badge { background: rgba(255,255,255,.68); border: 1px solid rgba(255,255,255,.8); }
.level-pill { background: var(--ink); color: white; }
.status-pill { border: 1px solid var(--line); background: var(--paper); color: var(--muted); }
.status-pill.done { border-color: #b7d5c5; background: #edf7f0; color: #2f6b50; }
.primary-button, .secondary-button, .text-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 999px;
  padding: 10px 20px;
  font-weight: 900;
  cursor: pointer;
}
.primary-button { border: 1px solid var(--coral); background: var(--coral); color: white; box-shadow: 0 9px 22px rgba(233,104,75,.24); }
.primary-button:hover { background: var(--coral-dark); }
.secondary-button { border: 1px solid var(--line); background: var(--paper); }
.text-button { min-height: 38px; border: 0; background: transparent; color: var(--coral-dark); padding: 6px 10px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.section-heading h2 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(29px, 4vw, 42px); letter-spacing: -.04em; }
.section-heading > a { color: var(--coral-dark); font-size: 14px; font-weight: 900; }

.home-intro { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); align-items: end; gap: 34px; margin-bottom: 34px; }
.home-intro h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(46px, 7vw, 78px); line-height: .98; letter-spacing: -.055em; }
.home-intro h1 em { color: var(--coral); font-style: italic; }
.home-intro p:not(.eyebrow) { max-width: 620px; margin: 22px 0 0; color: var(--muted); font-size: 17px; }
.rhythm-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); padding: 22px; box-shadow: var(--shadow); }
.rhythm-card header { display: flex; justify-content: space-between; align-items: start; gap: 10px; }
.rhythm-card header strong { display: block; margin-top: 2px; font-family: Georgia, serif; font-size: 24px; }
.rhythm-card header > span { color: var(--coral-dark); font-weight: 900; }
.rhythm-days { display: grid; grid-template-columns: repeat(7, 1fr); gap: 7px; margin-top: 18px; }
.rhythm-days div { display: grid; gap: 7px; justify-items: center; color: var(--muted); font-size: 11px; font-weight: 800; }
.rhythm-days b { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: #eee8df; color: var(--ink); }
.rhythm-days .done b { background: var(--sage); color: white; }

.today-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, .55fr); gap: 18px; margin-bottom: 54px; }
.recommend-card { position: relative; min-height: 410px; overflow: hidden; display: grid; grid-template-columns: 1.1fr .9fr; border-radius: 30px; background: var(--topic-pale, #f7d7ce); padding: 38px; box-shadow: var(--shadow); }
.recommend-copy { position: relative; z-index: 2; }
.recommend-copy .topline { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 12px; font-weight: 800; }
.recommend-copy h2 { max-width: 550px; margin: 36px 0 12px; font-family: Georgia, "Songti SC", serif; font-size: clamp(31px, 4vw, 48px); line-height: 1.06; letter-spacing: -.04em; }
.recommend-copy > p { max-width: 510px; color: #505b5b; }
.rec-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 28px; }
.rec-tags span { padding: 6px 10px; border: 1px solid rgba(23,38,58,.12); border-radius: 999px; background: rgba(255,255,255,.45); font-size: 12px; font-weight: 800; }
.recommend-art { position: relative; min-height: 280px; }
.recommend-art .sheet { position: absolute; right: 7%; top: 14%; width: 74%; height: 68%; transform: rotate(7deg); border: 2px solid var(--ink); border-radius: 12px; background: var(--paper); box-shadow: 10px 12px 0 rgba(23,38,58,.12); }
.recommend-art .sheet::before { content: "HELLO"; position: absolute; left: 14%; top: 28%; font-family: Georgia, serif; font-size: clamp(28px, 4vw, 48px); font-weight: 900; }
.recommend-art .sheet::after { content: ""; position: absolute; left: 14%; top: 58%; width: 55%; height: 5px; background: var(--coral); box-shadow: 0 18px 0 var(--sage), 0 36px 0 var(--gold); }
.recommend-art .sun { position: absolute; right: 0; top: 1%; width: 88px; height: 88px; border-radius: 50%; background: #f4bd54; }
.recommend-art .leaf { position: absolute; left: 2%; bottom: 5%; width: 74px; height: 112px; border-radius: 100% 0 100% 0; background: var(--sage); transform: rotate(-22deg); }
.daily-aside { display: grid; gap: 18px; }
.stat-card, .continue-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); padding: 25px; box-shadow: var(--shadow); }
.stat-card { display: grid; place-items: center; text-align: center; }
.stat-ring { display: grid; place-items: center; width: 132px; height: 132px; border-radius: 50%; background: conic-gradient(var(--coral) var(--progress, 0deg), #ebe5dc 0); }
.stat-ring::before { content: ""; grid-area: 1/1; width: 102px; height: 102px; border-radius: 50%; background: var(--paper); }
.stat-ring span { position: relative; grid-area: 1/1; }
.stat-ring strong { display: block; font-family: Georgia, serif; font-size: 42px; line-height: 1; }
.stat-card h3 { margin: 16px 0 3px; }
.stat-card p, .continue-card small { color: var(--muted); }
.continue-card { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.continue-card strong, .continue-card small { display: block; }
.continue-card strong { margin: 6px 0; font-family: Georgia, serif; font-size: 21px; }
.round-arrow { display: grid; place-items: center; flex: 0 0 auto; width: 42px; height: 42px; border-radius: 50%; background: var(--ink); color: white; }

.section-block { margin-top: 58px; }
.mode-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.mode-card { min-height: 220px; position: relative; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--line); border-radius: 20px; background: var(--paper); padding: 20px; transition: transform .18s, border-color .18s; }
.mode-card:hover { transform: translateY(-4px); border-color: var(--mode-color); }
.mode-mark { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: color-mix(in srgb, var(--mode-color) 14%, white); color: var(--mode-color); font-weight: 900; }
.mode-card h3 { margin: 20px 0 6px; font-size: 20px; }
.mode-card p { margin: 0; color: var(--muted); font-size: 13px; }
.mode-card small { color: var(--mode-color); font-weight: 900; }
.topic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.topic-card { position: relative; overflow: hidden; min-height: 220px; border: 1px solid var(--line); border-radius: 22px; background: var(--paper); padding: 22px; }
.topic-card::after { content: attr(data-mark); position: absolute; right: -7px; bottom: -28px; color: var(--topic-pale); font: 900 100px/1 Georgia, serif; }
.topic-card h3 { position: relative; z-index: 1; margin: 24px 0 2px; font-family: Georgia, "Songti SC", serif; font-size: 25px; }
.topic-card p { position: relative; z-index: 1; margin: 0; color: var(--muted); }
.topic-card .mini-progress { position: relative; z-index: 1; height: 7px; margin-top: 30px; overflow: hidden; border-radius: 999px; background: #ece7df; }
.topic-card .mini-progress i { display: block; width: var(--value); height: 100%; background: var(--topic-color); }
.topic-card small { position: relative; z-index: 1; display: block; margin-top: 8px; color: var(--muted); }

.library-hero { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 24px; margin-bottom: 28px; }
.library-hero h1, .review-hero h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(43px, 6vw, 70px); line-height: 1; letter-spacing: -.05em; }
.library-hero p, .review-hero p { max-width: 650px; color: var(--muted); font-size: 16px; }
.unit-count { display: grid; place-items: center; min-width: 120px; min-height: 96px; border: 1px solid var(--line); border-radius: 18px; background: var(--paper); }
.unit-count strong { font-family: Georgia, serif; font-size: 38px; line-height: 1; }
.unit-count span { color: var(--muted); font-size: 12px; font-weight: 800; }
.filters { display: grid; grid-template-columns: repeat(4, minmax(140px, 1fr)) auto; gap: 10px; margin: 24px 0; padding: 15px; border: 1px solid var(--line); border-radius: 18px; background: var(--paper); }
.filters label { display: grid; gap: 5px; color: var(--muted); font-size: 11px; font-weight: 900; }
.filters select { width: 100%; min-height: 40px; border: 1px solid var(--line); border-radius: 10px; background: white; padding: 7px 9px; color: var(--ink); }
.filters .secondary-button { align-self: end; min-height: 40px; }
.library-list { display: grid; gap: 14px; }
.library-topic { overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: var(--paper); }
.library-topic-main { width: 100%; display: grid; grid-template-columns: 116px 1fr auto; align-items: center; gap: 22px; border: 0; background: transparent; padding: 18px; text-align: left; cursor: pointer; }
.library-art { position: relative; display: grid; place-items: center; align-content: center; min-height: 112px; overflow: hidden; border-radius: 16px; background: var(--topic-pale); }
.library-art strong { position: relative; z-index: 1; font-family: Georgia, serif; font-size: 38px; }
.library-art span { position: relative; z-index: 1; font-size: 11px; font-weight: 900; }
.library-art::after { content: ""; position: absolute; width: 68px; height: 68px; border-radius: 50%; background: rgba(255,255,255,.48); }
.library-copy > div { display: flex; align-items: center; gap: 8px; }
.library-copy h2 { margin: 8px 0 0; font-family: Georgia, "Songti SC", serif; font-size: 27px; }
.library-copy h3 { margin: 0; color: var(--topic-color); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.library-copy p { margin: 8px 0 0; color: var(--muted); }
.expand-mark { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; background: white; font-size: 22px; }
.unit-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; padding: 0 18px 18px 156px; }
.unit-choice { display: flex; flex-direction: column; gap: 10px; min-height: 128px; border: 1px solid var(--line); border-radius: 15px; padding: 14px; background: #fbfaf6; }
.unit-choice:hover { border-color: var(--mode-color); }
.unit-choice > span:first-child { color: var(--mode-color); font-size: 18px; font-weight: 900; }
.unit-choice strong { font-size: 14px; }
.unit-choice small { margin-top: auto; color: var(--muted); }
.empty-filter { border: 1px dashed var(--line); border-radius: 22px; padding: 55px 20px; background: rgba(255,255,255,.35); text-align: center; color: var(--muted); }

.learning { --topic-color: var(--coral); --topic-pale: #f7ddd5; width: min(1080px, calc(100% - 36px)); margin: 0 auto; padding: 28px 0 82px; }
.lesson-top { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; }
.lesson-close { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; background: var(--paper); font-size: 22px; }
.lesson-title span, .lesson-title strong { display: block; }
.lesson-title span { color: var(--muted); font-size: 11px; font-weight: 900; letter-spacing: .1em; }
.lesson-title strong { font-family: Georgia, "Songti SC", serif; font-size: 20px; }
.speed { display: flex; align-items: center; gap: 4px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); }
.speed span { padding: 0 7px; color: var(--muted); font-size: 11px; font-weight: 900; }
.speed button { min-height: 32px; border: 0; border-radius: 999px; background: transparent; padding: 4px 10px; cursor: pointer; font-size: 12px; font-weight: 800; }
.speed button.active { background: var(--ink); color: white; }
.stepper { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin: 26px 0 38px; }
.stepper button { position: relative; display: grid; grid-template-columns: 32px 1fr; align-items: center; gap: 8px; border: 0; background: transparent; text-align: left; cursor: pointer; }
.stepper button::before { content: ""; position: absolute; left: 0; right: 0; bottom: -10px; height: 3px; border-radius: 99px; background: #ddd7cf; }
.stepper button.current::before, .stepper button.done::before { background: var(--topic-color); }
.stepper i { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid var(--line); border-radius: 50%; background: var(--paper); font-style: normal; font-size: 12px; font-weight: 900; }
.stepper .current i, .stepper .done i { border-color: var(--topic-color); background: var(--topic-color); color: white; }
.stepper button:disabled { cursor: default; opacity: .55; }
.lesson-header { max-width: 760px; margin: 0 auto 30px; text-align: center; }
.lesson-header h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(34px, 5vw, 54px); line-height: 1.05; letter-spacing: -.045em; }
.lesson-header > p:last-child { color: var(--muted); }
.lesson-content { min-height: 430px; }
.lesson-footer { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 18px; margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--line); }
.lesson-footer > span { color: var(--muted); text-align: center; font-size: 12px; }
.lesson-footer button { min-height: 46px; border-radius: 999px; padding: 9px 18px; font-weight: 900; cursor: pointer; }
.lesson-footer .back { border: 1px solid var(--line); background: var(--paper); }
.lesson-footer .next { border: 1px solid var(--coral); background: var(--coral); color: white; }
.lesson-footer button:disabled { cursor: not-allowed; opacity: .45; }

.welcome-step, .grammar-layout, .listening-warmup { display: grid; grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr); gap: 26px; align-items: stretch; }
.welcome-art { position: relative; min-height: 360px; display: grid; place-items: center; align-content: center; overflow: hidden; border-radius: 26px; background: var(--topic-pale); }
.welcome-art strong { position: relative; z-index: 1; font: 900 92px/1 Georgia, serif; }
.welcome-art span { position: relative; z-index: 1; font-weight: 900; letter-spacing: .12em; }
.welcome-art::before, .welcome-art::after { content: ""; position: absolute; border-radius: 50%; background: rgba(255,255,255,.46); }
.welcome-art::before { width: 230px; height: 230px; }
.welcome-art::after { right: -20px; bottom: -30px; width: 130px; height: 130px; }
.welcome-copy { align-self: center; }
.welcome-copy h2 { margin: 18px 0 8px; font: 700 35px/1.1 Georgia, "Songti SC", serif; }
.welcome-copy p { color: var(--muted); }
.welcome-copy ul { display: grid; gap: 9px; padding: 0; margin: 22px 0 0; list-style: none; }
.welcome-copy li::before { content: "✓"; display: inline-grid; place-items: center; width: 23px; height: 23px; margin-right: 9px; border-radius: 50%; background: var(--sage-pale); color: #31604c; font-weight: 900; }
.vocab-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.word-card { position: relative; min-height: 250px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 19px; background: var(--paper); padding: 18px; }
.word-card.mastered { border-color: #91b6a2; background: #f5fbf6; }
.word-index { color: var(--muted); font-size: 11px; font-weight: 900; }
.word-head { display: flex; justify-content: space-between; gap: 10px; align-items: start; margin-top: 15px; }
.word-head h3 { margin: 0; font: 700 27px/1.1 Georgia, serif; }
.word-head p { margin: 3px 0 0; color: var(--muted); font-size: 13px; }
.audio-button { display: grid; place-items: center; flex: 0 0 auto; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; background: white; cursor: pointer; }
.audio-button.playing { border-color: var(--coral); background: var(--coral); color: white; animation: audioPulse 1s ease-in-out infinite; }
.play-dialogue.playing, .dictation-play.playing, .big-audio button.playing { background: var(--sage); box-shadow: 0 0 0 8px rgba(110,143,127,.15); }
@keyframes audioPulse { 50% { transform: scale(.92); box-shadow: 0 0 0 8px rgba(233,104,75,.13); } }
.translation { display: block; margin-top: 24px; color: var(--coral-dark); font-size: 19px; }
.word-example { margin: 6px 0 8px; color: var(--muted); font-size: 13px; }
.reveal-button { margin: auto 0 12px; min-height: 42px; border: 1px dashed var(--line); border-radius: 12px; background: #faf7f1; cursor: pointer; font-weight: 800; }
.word-actions { display: flex; gap: 6px; margin-top: auto; padding-top: 13px; }
.word-actions button { min-height: 34px; flex: 1; border: 1px solid var(--line); border-radius: 10px; background: white; cursor: pointer; font-size: 11px; font-weight: 800; }
.word-actions button.active { border-color: var(--coral); color: var(--coral-dark); }
.word-actions button.mastered { border-color: var(--sage); background: var(--sage-pale); color: #315d4a; }
.spelling-box { margin: 18px 0; }
.spelling-box label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 12px; font-weight: 800; }
.spelling-box div { display: flex; gap: 7px; }
.spelling-box input { min-width: 0; flex: 1; min-height: 40px; border: 1px solid var(--line); border-radius: 10px; padding: 7px 9px; }
.spelling-box button { border: 0; border-radius: 10px; background: var(--ink); color: white; padding: 7px 12px; font-weight: 800; }
.spell-result { margin: 7px 0 0; font-size: 12px; font-weight: 800; }
.spell-result.good { color: #2c7652; }
.spell-result.bad { color: #a24b3a; }

.dialogue-toolbar { display: flex; justify-content: center; gap: 8px; margin-bottom: 16px; }
.play-dialogue { min-height: 44px; border: 0; border-radius: 999px; background: var(--ink); color: white; padding: 9px 18px; cursor: pointer; font-weight: 900; }
.dialogue-list { display: grid; gap: 9px; }
.dialogue-line { display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 12px; border: 1px solid var(--line); border-radius: 15px; background: var(--paper); padding: 14px; }
.dialogue-line.role { border-color: var(--topic-color); box-shadow: inset 4px 0 0 var(--topic-color); }
.speaker-avatar { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--topic-pale); font-weight: 900; }
.dialogue-line span { color: var(--muted); font-size: 10px; font-weight: 900; letter-spacing: .1em; }
.dialogue-line p { margin: 3px 0 1px; font-weight: 800; }
.dialogue-line small { color: var(--muted); }
.listen-cover { min-height: 360px; display: grid; place-items: center; align-content: center; gap: 26px; border: 1px solid var(--line); border-radius: 24px; background: var(--ink); color: white; text-align: center; }
.sound-bars { height: 90px; display: flex; align-items: center; gap: 5px; }
.sound-bars i { width: 5px; height: calc(20px + (var(--n) * 5px)); max-height: 86px; border-radius: 99px; background: var(--coral); animation: pulse 1.1s ease-in-out infinite alternate; animation-delay: calc(var(--n) * -80ms); }
@keyframes pulse { to { transform: scaleY(.35); opacity: .55; } }
.role-switch { display: flex; align-items: center; justify-content: center; gap: 7px; margin-bottom: 15px; }
.role-switch span { margin-right: 8px; color: var(--muted); font-size: 12px; font-weight: 800; }
.role-switch button { min-height: 36px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); padding: 6px 12px; cursor: pointer; }
.role-switch button.active { border-color: var(--ink); background: var(--ink); color: white; }
.prompt-grid, .contrast-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.prompt-card, .contrast-card { min-height: 245px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 20px; background: var(--paper); padding: 20px; }
.prompt-card .number { color: var(--coral-dark); font-weight: 900; }
.prompt-card h3, .contrast-card h3 { margin: 32px 0 8px; font: 700 23px/1.25 Georgia, serif; }
.prompt-card p, .contrast-card p { color: var(--muted); }
.prompt-card .audio-button, .contrast-card .audio-button { margin-top: auto; }

.grammar-rule, .summary-sheet, .dictation-card, .self-rating, .recorder-card { border: 1px solid var(--line); border-radius: 24px; background: var(--paper); padding: 30px; }
.grammar-rule h2, .summary-sheet h2, .dictation-card h2, .self-rating h2 { margin: 10px 0; font: 700 35px/1.12 Georgia, "Songti SC", serif; }
.grammar-rule > p, .summary-sheet > p, .dictation-card > p, .self-rating > p { color: var(--muted); }
.formula { margin: 22px 0; border-left: 4px solid var(--coral); background: #faf3ea; padding: 18px; font-family: Georgia, serif; font-size: 20px; font-weight: 700; }
.grammar-tip { display: flex; gap: 10px; border-radius: 14px; background: var(--sage-pale); padding: 14px; }
.grammar-tip p { margin: 0; font-size: 13px; }
.grammar-tip strong { display: block; }
.example-stack { display: grid; gap: 10px; }
.example-card { display: grid; grid-template-columns: 36px 1fr auto; align-items: center; gap: 12px; border: 1px solid var(--line); border-radius: 17px; background: var(--paper); padding: 16px; }
.example-card > span { color: var(--coral-dark); font-weight: 900; }
.example-card strong { font-family: Georgia, serif; font-size: 18px; }
.example-card p { margin: 3px 0 0; color: var(--muted); }
.summary-lines { display: grid; gap: 8px; margin-top: 22px; }
.summary-lines p { display: grid; gap: 2px; margin: 0; border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.summary-lines span { color: var(--muted); font-size: 13px; }

.quiz-stack { display: grid; gap: 13px; }
.quiz-card { display: grid; grid-template-columns: 42px 1fr; gap: 14px; border: 1px solid var(--line); border-radius: 19px; background: var(--paper); padding: 20px; }
.quiz-number { color: var(--coral-dark); font-weight: 900; }
.quiz-prompt { display: flex; justify-content: space-between; gap: 12px; }
.quiz-prompt h3 { margin: 0; font: 700 20px/1.3 Georgia, serif; }
.quiz-prompt p { margin: 4px 0 14px; color: var(--muted); }
.answer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.answer-grid button { min-height: 45px; display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 11px; background: #fbfaf6; padding: 8px; cursor: pointer; text-align: left; }
.answer-grid button span { display: grid; place-items: center; width: 27px; height: 27px; border-radius: 50%; background: white; font-size: 11px; font-weight: 900; }
.answer-grid button.correct { border-color: #6eaa88; background: #eef8f1; }
.answer-grid button.wrong { border-color: #d98270; background: #fff0ec; }
.answer-note { margin-top: 10px; border-radius: 10px; padding: 9px 11px; font-size: 12px; }
.answer-note strong { margin-right: 7px; }
.answer-note.correct { background: #eef8f1; color: #2c6b4a; }
.answer-note.wrong { background: #fff0ec; color: #984332; }

.listening-warmup { align-items: center; }
.big-audio { min-height: 330px; display: grid; place-items: center; border-radius: 24px; background: var(--ink); }
.big-audio button { grid-area: 1/1; width: 82px; height: 82px; border: 0; border-radius: 50%; background: var(--coral); color: white; cursor: pointer; font-size: 25px; }
.sound-circle { grid-area: 1/1; width: 190px; height: 190px; border: 2px solid rgba(255,255,255,.12); border-radius: 50%; box-shadow: 0 0 0 35px rgba(255,255,255,.05), 0 0 0 70px rgba(255,255,255,.025); }
.rate-picker { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 22px; }
.rate-picker button { min-height: 38px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); padding: 6px 12px; cursor: pointer; }
.rate-picker button.active { background: var(--ink); color: white; }
.dictation-card { max-width: 760px; margin: 0 auto; }
.dictation-play { min-height: 44px; border: 0; border-radius: 999px; background: var(--ink); color: white; padding: 8px 16px; cursor: pointer; font-weight: 900; }
.dictation-card textarea { width: 100%; min-height: 140px; margin-top: 15px; border: 1px solid var(--line); border-radius: 14px; padding: 14px; resize: vertical; }
.dictation-actions { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.dictation-actions button { min-height: 38px; border: 1px solid var(--line); border-radius: 10px; background: white; padding: 6px 12px; cursor: pointer; font-weight: 800; }
.dictation-result { font-size: 13px; font-weight: 800; }

.recorder-card { max-width: 720px; margin: 0 auto; text-align: center; }
.record-orb { width: 116px; height: 116px; display: grid; place-items: center; margin: 0 auto 18px; border-radius: 50%; background: #f8ded7; }
.record-orb span { width: 46px; height: 46px; border-radius: 50%; background: var(--coral); }
.record-orb.recording { animation: recordPulse 1s infinite; }
@keyframes recordPulse { 50% { box-shadow: 0 0 0 20px rgba(233,104,75,.12); } }
.record-prompt { font: 700 25px/1.3 Georgia, serif; }
.record-button { min-height: 46px; border: 0; border-radius: 999px; background: var(--coral); color: white; padding: 9px 18px; cursor: pointer; font-weight: 900; }
.recorder-card small { display: block; margin: 12px auto; color: var(--muted); }
.record-playback { width: 100%; margin-top: 10px; }
.self-rating { max-width: 820px; margin: 0 auto; text-align: center; }
.rating-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-top: 24px; }
.rating-grid button { min-height: 100px; border: 1px solid var(--line); border-radius: 14px; background: #fbfaf6; cursor: pointer; }
.rating-grid button strong, .rating-grid button span { display: block; }
.rating-grid button strong { font-family: Georgia, serif; font-size: 28px; }
.rating-grid button span { color: var(--muted); font-size: 11px; }
.rating-grid button.active { border-color: var(--coral); background: #fff0ec; color: var(--coral-dark); }

.completion { max-width: 820px; margin: 0 auto; padding: 75px 20px; text-align: center; }
.completion-mark { display: grid; place-items: center; width: 94px; height: 94px; margin: 18px auto; border-radius: 50%; background: var(--sage); color: white; font-size: 43px; }
.completion h1 { margin: 0; font: 700 clamp(40px, 6vw, 68px)/1 Georgia, "Songti SC", serif; }
.completion h1 em { color: var(--coral); font-style: italic; }
.completion > p:not(.eyebrow) { max-width: 650px; margin: 18px auto; color: var(--muted); }
.completion-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 28px 0; }
.completion-stats div { border: 1px solid var(--line); border-radius: 17px; background: var(--paper); padding: 18px; }
.completion-stats strong, .completion-stats span { display: block; }
.completion-stats strong { font: 700 34px/1 Georgia, serif; }
.completion-stats span { margin-top: 7px; color: var(--muted); font-size: 12px; }
.completion-actions { display: flex; justify-content: center; gap: 8px; }

.review-hero { margin-bottom: 30px; }
.review-summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 26px; }
.review-summary div { border: 1px solid var(--line); border-radius: 17px; background: var(--paper); padding: 18px; }
.review-summary strong, .review-summary span { display: block; }
.review-summary strong { font: 700 32px/1 Georgia, serif; }
.review-summary span { margin-top: 7px; color: var(--muted); font-size: 12px; }
.review-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.review-panel { border: 1px solid var(--line); border-radius: 22px; background: var(--paper); padding: 22px; }
.review-panel.full { grid-column: 1 / -1; }
.review-panel header { display: flex; justify-content: space-between; align-items: start; gap: 10px; margin-bottom: 15px; }
.review-panel h2 { margin: 0; font: 700 28px/1.1 Georgia, "Songti SC", serif; }
.review-panel header span { color: var(--coral-dark); font-weight: 900; }
.review-list { display: grid; gap: 8px; }
.review-item { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; border: 1px solid var(--line); border-radius: 13px; background: #fbfaf6; padding: 13px; }
.review-item strong, .review-item span, .review-item small { display: block; }
.review-item span, .review-item small { color: var(--muted); }
.review-item button, .review-item a { min-height: 36px; border: 1px solid var(--line); border-radius: 999px; background: white; padding: 6px 11px; cursor: pointer; font-size: 12px; font-weight: 800; }
.empty-review { padding: 35px 15px; border: 1px dashed var(--line); border-radius: 14px; color: var(--muted); text-align: center; }
.danger-zone { display: flex; justify-content: space-between; gap: 16px; align-items: center; margin-top: 18px; padding: 16px; border: 1px dashed #d7a49a; border-radius: 16px; color: #7e453b; }
.danger-zone p { margin: 0; }
.danger-zone button { flex: 0 0 auto; min-height: 40px; border: 1px solid #c96e5b; border-radius: 999px; background: white; color: #a24533; padding: 7px 14px; cursor: pointer; font-weight: 900; }

.offline-note { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 36px; border-top: 1px solid var(--line); background: rgba(255,253,248,.65); color: var(--muted); font-size: 11px; }
.offline-note i { width: 8px; height: 8px; border-radius: 50%; background: #4a9c6b; }
.toast { position: fixed; left: 50%; bottom: 24px; z-index: 100; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; max-width: min(520px, calc(100% - 30px)); border-radius: 999px; background: var(--ink); color: white; padding: 11px 18px; box-shadow: var(--shadow); font-size: 13px; font-weight: 800; transition: .2s; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 980px) {
  .mode-grid { grid-template-columns: repeat(3, 1fr); }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .unit-list { grid-template-columns: repeat(2, 1fr); padding-left: 18px; }
  .vocab-grid { grid-template-columns: repeat(2, 1fr); }
  .prompt-grid, .contrast-grid { grid-template-columns: 1fr; }
  .filters { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .topbar { grid-template-columns: 1fr auto; min-height: 62px; padding: 0 16px; }
  .nav { position: fixed; left: 50%; bottom: 12px; z-index: 50; transform: translateX(-50%); box-shadow: var(--shadow); background: var(--paper); }
  .header-progress { font-size: 0; }
  .page { width: min(100% - 24px, 1180px); padding-top: 34px; padding-bottom: 105px; }
  .home-intro, .today-grid, .recommend-card, .welcome-step, .grammar-layout, .listening-warmup, .review-grid { grid-template-columns: 1fr; }
  .home-intro { gap: 22px; }
  .recommend-card { padding: 26px; }
  .recommend-art { min-height: 210px; }
  .mode-grid, .topic-grid { grid-template-columns: 1fr 1fr; }
  .mode-card { min-height: 190px; }
  .library-hero { grid-template-columns: 1fr; }
  .unit-count { width: 100%; grid-auto-flow: column; min-height: 70px; }
  .filters { grid-template-columns: 1fr 1fr; }
  .library-topic-main { grid-template-columns: 82px 1fr auto; gap: 12px; padding: 12px; }
  .library-art { min-height: 92px; }
  .library-copy p { display: none; }
  .unit-list { grid-template-columns: 1fr; padding: 0 12px 12px; }
  .unit-choice { min-height: 96px; }
  .lesson-top { grid-template-columns: auto 1fr; }
  .speed { grid-column: 1 / -1; justify-self: center; }
  .stepper button { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .stepper button span { font-size: 10px; }
  .lesson-content { min-height: 360px; }
  .lesson-footer { grid-template-columns: 1fr 1fr; }
  .lesson-footer > span { display: none; }
  .vocab-grid { grid-template-columns: 1fr; }
  .answer-grid { grid-template-columns: 1fr; }
  .rating-grid { grid-template-columns: repeat(5, minmax(70px, 1fr)); overflow-x: auto; }
  .review-grid { display: grid; }
  .review-panel.full { grid-column: auto; }
  .review-summary { grid-template-columns: 1fr 1fr; }
  .completion-stats { grid-template-columns: 1fr; }
  .danger-zone { align-items: start; flex-direction: column; }
}

@media (max-width: 480px) {
  .brand { font-size: 19px; }
  .brand-cup { transform: scale(.86); }
  .nav a { min-width: 68px; padding: 8px 12px; }
  .mode-grid, .topic-grid, .filters { grid-template-columns: 1fr; }
  .rhythm-card { padding: 16px; }
  .rhythm-days { gap: 3px; }
  .rhythm-days b { width: 28px; height: 28px; }
  .recommend-copy h2 { margin-top: 24px; }
  .library-topic-main { grid-template-columns: 70px 1fr auto; }
  .library-art { min-height: 80px; }
  .library-copy h2 { font-size: 22px; }
  .expand-mark { width: 34px; height: 34px; }
  .dialogue-line { grid-template-columns: 34px 1fr; }
  .dialogue-line .audio-button { grid-column: 2; }
  .quiz-card { grid-template-columns: 1fr; }
  .quiz-number { display: none; }
  .completion-actions { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

:root{--muted:#5c655f;--coral:#bd4b34;--coral-dark:#aa3d29}
main:focus{outline:none}
@media(max-width:760px){.topbar .nav{position:static;left:auto;bottom:auto;transform:none;box-shadow:none}.topbar .header-progress{display:block;font-size:14px}}
@media(max-width:480px){.dialogue-line .audio-button{grid-column:auto}}
@media(max-width:360px){.app-shell .topbar{grid-template-columns:1fr}.topbar .brand,.topbar .nav{justify-self:center}}
body{font-size:16px}button{cursor:pointer;min-height:44px}button:disabled{opacity:.45;cursor:default}small,.mini-label,.eyebrow,.header-progress,.status-pill,.level-pill{font-size:14px}.mini-label{letter-spacing:.08em}
input,textarea,select{border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:10px;color:var(--ink);max-width:100%;min-height:44px}textarea{width:100%;min-height:110px;resize:vertical}input{width:100%}label{display:block}summary{cursor:pointer;padding:12px 0;font-weight:700}details p{margin:12px 0}fieldset{border:1px solid var(--line);border-radius:16px;padding:18px;margin:18px 0}legend{font-weight:800;padding:0 8px}
.big-number{font:700 54px Georgia,serif}.big-number small{font:400 20px sans-serif;margin-left:6px}.recommend-card h2{font:700 clamp(30px,4vw,46px) Georgia,'Songti SC',serif;line-height:1.2}.recommend-card p{max-width:620px}.level-select{margin-top:20px}.level-select select{margin-left:12px}.home-intro h1{font-size:clamp(40px,5.5vw,66px);line-height:1.13}.home-intro h1 em{font-style:normal}
.lesson-list{border-top:1px solid var(--line);padding:0 28px}.lesson-entry{padding:24px 0}.lesson-entry+.lesson-entry{border-top:1px dashed var(--line)}.lesson-heading{display:flex;gap:18px}.lesson-heading h3{font-size:24px;margin:0}.lesson-heading p{margin:6px 0}.lesson-number{color:var(--coral-dark);font:700 32px Georgia,serif}.lesson-entry .unit-list{border:0;padding:20px 0 0}.unit-choice{min-width:0}.unit-choice small{font-size:14px}.topic-card{min-height:220px}.topic-card small{font-size:14px}.mode-card h3{font-size:20px}.mode-card p{font-size:15px}
.learning-topline{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:28px}.learning-topline label{display:flex;align-items:center;gap:10px}.learning-heading h1{font:700 clamp(34px,5vw,54px) Georgia,'Songti SC',serif;margin:8px 0}.step-navigation{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0 14px}.step-navigation button{border:1px solid var(--line);background:var(--paper);border-radius:12px;padding:10px 14px}.step-navigation button.active{background:var(--ink);color:white}.step-progress{height:5px;border-radius:5px;background:var(--line)}.step-progress i{display:block;background:var(--coral);height:100%;border-radius:inherit}.lesson-content{padding:32px 0}.step-title{font-size:28px;margin:10px 0 24px}.step-footer{display:flex;align-items:center;justify-content:space-between;gap:14px;border-top:1px solid var(--line);padding-top:24px}.step-footer span{white-space:nowrap}.health-note{border-left:4px solid var(--coral);padding-left:14px;font-size:14px}
.word-card{min-width:0}.word-head{gap:12px}.word-head h3{font-size:clamp(25px,2.5vw,34px);overflow-wrap:anywhere}.word-actions{margin-top:22px}.word-actions button{font-size:14px;padding:8px}.word-card .audio-button{flex-shrink:0}.word-card p .audio-button{vertical-align:middle;width:44px;height:44px}.dialogue-line p{line-height:1.6}.dialogue-line small{font-size:15px}.dialogue-toolbar{flex-wrap:wrap}.role-switch{margin:0}.quiz-card{min-width:0}.quiz-card form{display:flex;align-items:end;gap:12px;margin-top:18px}.quiz-card form label{flex:1;min-width:0}.quiz-card input{margin-top:8px}.quiz-card form button{flex-shrink:0}.quiz-card h3{overflow-wrap:anywhere}.answer-note p{margin:8px 0}.answer-grid button{text-align:left}.order-result{background:var(--sage-pale);border:1px solid #9aac9e;border-radius:12px;min-height:65px;padding:16px;margin:20px 0;line-height:1.7}.token-bank{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.token-bank button{border-radius:10px;white-space:normal;text-align:left}.prompt-card label{margin-top:20px}.prompt-card textarea{margin-top:8px}.recorder-card{margin:24px 0}.rating-grid{grid-template-columns:repeat(3,1fr)}.rating-grid button{padding:18px;font-size:16px}.grammar-rule del{display:block;margin:12px 0}.grammar-tip p{overflow-wrap:anywhere}.example-card{min-width:0}.example-card strong{overflow-wrap:anywhere}
.review-panel{min-width:0}.review-item{gap:10px;flex-wrap:wrap}.review-item>div{flex:1;min-width:160px}.review-item strong,.review-item span{overflow-wrap:anywhere}.legacy-panel{margin:28px 0;padding:24px;border:1px solid var(--line);border-radius:18px}.legacy-panel details{margin:12px 0}.danger-button{border:1px solid #aa3328;border-radius:12px;color:#9b261f;background:white;padding:12px 16px}.toast{max-width:min(700px,calc(100vw - 32px));white-space:normal;font-size:15px}.offline-note{line-height:1.8;padding:24px}.completion-actions{flex-wrap:wrap}
@media(max-width:720px){.topbar{padding:12px 16px;grid-template-columns:1fr auto;gap:12px}.header-progress{grid-column:1/-1;justify-self:center}.nav a{min-width:50px;padding:8px 12px}.brand{font-size:20px}.page{width:calc(100% - 32px);padding-top:28px}.home-intro{display:block}.rhythm-card{margin-top:24px}.home-intro h1{font-size:42px}.today-grid{display:block}.daily-aside{margin-top:16px}.recommend-card{padding:26px}.lesson-list{padding:0 16px}.unit-list{grid-template-columns:repeat(2,minmax(0,1fr))}.unit-choice:last-child{grid-column:auto}.learning-topline{align-items:start;flex-direction:column}.step-navigation button{font-size:14px;padding:8px 10px}.quiz-card{padding:20px 14px;grid-template-columns:1fr}.quiz-card form{align-items:stretch;flex-direction:column}.quiz-card form label{width:100%}.quiz-number{display:none}.dialogue-line{padding:16px 8px;grid-template-columns:28px minmax(0,1fr) 44px;gap:10px}.speaker-avatar{width:28px;height:28px;font-size:14px}.dialogue-line .audio-button{width:44px;height:44px}.rating-grid{grid-template-columns:1fr}.step-footer .primary-button,.step-footer .secondary-button{padding:10px 14px;font-size:14px}.grammar-layout{display:block}.example-stack{margin-top:16px}.word-actions{flex-wrap:wrap}.danger-zone{align-items:start;gap:20px;flex-direction:column}.library-art{display:none}.library-topic-main{grid-template-columns:1fr auto;padding:22px}.library-copy h2{font-size:26px}.library-hero{gap:16px}.library-hero h1{font-size:40px}.unit-count strong{font-size:52px}.unit-count span{font-size:13px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}