:root {
  --bg: #f7f7fc;
  --surface: #ffffff;
  --surface-2: #f0efff;
  --ink: #21233a;
  --muted: #777b95;
  --line: #e8e7f2;
  --primary: #7357ff;
  --primary-2: #a792ff;
  --teal: #23b9a5;
  --orange: #ff9f43;
  --pink: #ef5da8;
  --blue: #2d98da;
  --success: #28b879;
  --danger: #ef5b67;
  --warning: #f3a733;
  --shadow: 0 16px 40px rgba(44, 37, 91, .10);
  --soft-shadow: 0 8px 22px rgba(44, 37, 91, .07);
  --radius: 24px;
  --topbar-h: 72px;
  --nav-h: 78px;
  font-family: Inter, ui-rounded, "SF Pro Rounded", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); }
body { overflow-x: hidden; -webkit-tap-highlight-color: transparent; }
button, input, textarea, select { font: inherit; }
button { border: 0; cursor: pointer; color: inherit; }
button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid rgba(115,87,255,.25); outline-offset: 2px; }
img { display: block; max-width: 100%; }

.app-shell { min-height: 100dvh; }
.topbar {
  position: fixed; z-index: 40; top: 0; left: 0; right: 0;
  height: calc(var(--topbar-h) + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) clamp(16px, 3vw, 32px) 0;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(247,247,252,.88); backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(232,231,242,.8);
}
.brand { display: flex; align-items: center; gap: 10px; background: transparent; padding: 5px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center;
  color: #fff; font-weight: 900; font-size: 23px;
  background: linear-gradient(145deg, var(--primary), #9b6cff);
  box-shadow: 0 8px 20px rgba(115,87,255,.3);
}
.brand-copy { display: grid; text-align: left; line-height: 1.05; }
.brand-copy b { font-size: 18px; letter-spacing: -.3px; }
.brand-copy small { margin-top: 4px; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: .3px; }
.top-stats { display: flex; gap: 8px; }
.stat-chip {
  min-width: 50px; height: 40px; padding: 0 10px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  background: var(--surface); border: 1px solid var(--line); box-shadow: var(--soft-shadow);
}
.stat-chip b { font-size: 14px; }

.main-view {
  width: min(1180px, 100%); margin: 0 auto;
  min-height: 100dvh;
  padding: calc(var(--topbar-h) + env(safe-area-inset-top) + 22px) clamp(16px, 4vw, 38px) calc(var(--nav-h) + env(safe-area-inset-bottom) + 28px);
}
.bottom-nav {
  position: fixed; z-index: 45; left: 50%; bottom: max(10px, env(safe-area-inset-bottom)); transform: translateX(-50%);
  width: min(620px, calc(100% - 22px)); height: var(--nav-h);
  padding: 8px 10px; border-radius: 25px;
  background: rgba(255,255,255,.94); backdrop-filter: blur(20px);
  border: 1px solid rgba(226,224,240,.95); box-shadow: 0 18px 46px rgba(39,32,79,.18);
  display: grid; grid-template-columns: repeat(5, 1fr); align-items: end;
}
.nav-item { height: 58px; border-radius: 18px; background: transparent; display: grid; place-items: center; align-content: center; gap: 2px; color: var(--muted); }
.nav-item span { font-size: 21px; line-height: 1; }
.nav-item small { font-size: 10px; font-weight: 800; }
.nav-item.active { color: var(--primary); background: #f2efff; }
.nav-focus { position: relative; transform: translateY(-16px); color: white !important; background: linear-gradient(145deg, var(--primary), #9b6cff) !important; box-shadow: 0 12px 26px rgba(115,87,255,.35); border: 5px solid var(--bg); }
.nav-focus span { font-size: 19px; }
.nav-focus small { color: white; }

.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin: 4px 0 22px; }
.page-head h1, .page-head h2 { margin: 0; font-size: clamp(27px, 4vw, 42px); letter-spacing: -1.2px; }
.page-head p { margin: 7px 0 0; color: var(--muted); font-size: 14px; line-height: 1.55; }
.eyebrow { margin: 0 0 6px; color: var(--primary); font-size: 12px; font-weight: 900; letter-spacing: 1.4px; text-transform: uppercase; }

.hero {
  position: relative; overflow: hidden; border-radius: 30px; padding: clamp(22px, 5vw, 44px);
  color: #fff; background: radial-gradient(circle at 80% 10%, rgba(255,255,255,.25), transparent 28%), linear-gradient(135deg, #6448ff 0%, #8e6cff 54%, #22b9a7 130%);
  box-shadow: 0 22px 50px rgba(88,62,205,.22); min-height: 250px;
  display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(220px, .65fr); gap: 24px; align-items: center;
}
.hero::after { content: ""; position: absolute; width: 280px; height: 280px; border: 2px solid rgba(255,255,255,.18); border-radius: 50%; right: -75px; bottom: -155px; }
.hero h1 { margin: 0; max-width: 670px; font-size: clamp(30px, 5.2vw, 56px); line-height: 1.05; letter-spacing: -2px; }
.hero p { max-width: 620px; margin: 14px 0 22px; color: rgba(255,255,255,.86); line-height: 1.6; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-panel { position: relative; z-index: 2; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.25); border-radius: 24px; padding: 18px; backdrop-filter: blur(10px); }
.goal-ring { width: 132px; aspect-ratio: 1; margin: 0 auto 10px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(#fff var(--goal), rgba(255,255,255,.18) 0); position: relative; }
.goal-ring::before { content: ""; position: absolute; inset: 9px; border-radius: 50%; background: #7458f4; }
.goal-ring > div { position: relative; text-align: center; display: grid; }
.goal-ring strong { font-size: 27px; }
.goal-ring small { font-size: 10px; font-weight: 800; opacity: .85; }
.hero-mini { display: flex; justify-content: space-between; margin-top: 8px; font-size: 12px; font-weight: 700; color: rgba(255,255,255,.82); }

.btn { min-height: 48px; border-radius: 16px; padding: 0 18px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; font-weight: 850; transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease; }
.btn:active { transform: translateY(2px) scale(.99); }
.btn-primary { color: #fff; background: linear-gradient(145deg, var(--primary), #8b6cff); box-shadow: 0 10px 22px rgba(115,87,255,.24); }
.btn-white { color: var(--primary); background: #fff; box-shadow: 0 10px 22px rgba(43,31,113,.18); }
.btn-soft { color: var(--primary); background: #f0edff; border: 1px solid #ddd6ff; }
.btn-ghost { color: inherit; background: transparent; border: 1px solid var(--line); }
.btn-danger { color: #fff; background: var(--danger); }
.btn-success { color: #fff; background: var(--success); }
.btn-sm { min-height: 38px; padding: 0 13px; border-radius: 13px; font-size: 13px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; box-shadow: none; }
.icon-btn { width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center; background: var(--surface); border: 1px solid var(--line); }

.section { margin-top: 28px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.section-head h2, .section-head h3 { margin: 0; font-size: clamp(19px, 3vw, 25px); letter-spacing: -.5px; }
.section-head p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.link-btn { background: transparent; color: var(--primary); font-size: 13px; font-weight: 850; padding: 8px; }

.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; }
.quick-card, .tool-card, .stat-card, .library-card, .grammar-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--soft-shadow);
}
.quick-card { padding: 18px; text-align: left; min-height: 142px; position: relative; overflow: hidden; }
.quick-card::after { content: ""; position: absolute; width: 90px; height: 90px; border-radius: 50%; background: var(--tint, #eee); right: -34px; top: -30px; opacity: .55; }
.quick-icon { width: 46px; height: 46px; border-radius: 15px; display: grid; place-items: center; font-size: 23px; background: var(--tint, #f0edff); }
.quick-card b { display: block; margin-top: 13px; font-size: 15px; }
.quick-card small { display: block; color: var(--muted); margin-top: 5px; line-height: 1.35; }
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 6px 9px; border-radius: 999px; background: #f2efff; color: var(--primary); font-size: 10px; font-weight: 900; }
.badge-success { color: var(--success); background: #eafaf3; }
.badge-warning { color: #a66a00; background: #fff5df; }
.badge-danger { color: var(--danger); background: #ffedef; }

.level-tabs { display: flex; gap: 10px; overflow-x: auto; padding: 2px 2px 10px; scrollbar-width: none; scroll-snap-type: x proximity; }
.level-tabs::-webkit-scrollbar { display: none; }
.level-tab { flex: 0 0 auto; min-width: 128px; padding: 13px 15px; border-radius: 17px; text-align: left; background: var(--surface); border: 1px solid var(--line); scroll-snap-align: start; }
.level-tab b { display: block; font-size: 14px; }
.level-tab small { color: var(--muted); font-size: 10px; }
.level-tab.active { color: #fff; background: var(--level-color, var(--primary)); border-color: transparent; box-shadow: 0 10px 24px color-mix(in srgb, var(--level-color, var(--primary)) 28%, transparent); }
.level-tab.active small { color: rgba(255,255,255,.78); }

.level-banner { padding: 18px 20px; border-radius: 22px; color: white; display: flex; align-items: center; justify-content: space-between; gap: 16px; background: var(--level-color, var(--primary)); box-shadow: var(--soft-shadow); }
.level-banner h3 { margin: 0; }
.level-banner p { margin: 4px 0 0; color: rgba(255,255,255,.8); font-size: 13px; }
.level-progress { width: min(240px, 40%); }
.mini-track, .progress-track { height: 9px; border-radius: 99px; background: rgba(255,255,255,.2); overflow: hidden; }
.mini-fill, .progress-fill { height: 100%; border-radius: inherit; background: #fff; transition: width .25s ease; }

.roadmap { display: grid; gap: 13px; margin-top: 14px; }
.unit-card {
  --unit-color: var(--primary);
  display: grid; grid-template-columns: auto minmax(0,1fr) auto; gap: 15px; align-items: center; width: 100%;
  padding: 17px; text-align: left; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--soft-shadow);
}
.unit-card.locked { opacity: .62; filter: saturate(.65); }
.unit-icon { width: 58px; height: 58px; border-radius: 18px; display: grid; place-items: center; font-size: 27px; background: color-mix(in srgb, var(--unit-color) 13%, white); }
.unit-copy b { display: flex; align-items: center; gap: 8px; font-size: 16px; }
.unit-copy small { display: block; color: var(--muted); margin-top: 4px; }
.unit-meta { margin-top: 9px; display: flex; gap: 7px; flex-wrap: wrap; }
.unit-status { width: 52px; height: 52px; border-radius: 17px; display: grid; place-items: center; background: #f5f4fa; color: var(--muted); font-weight: 900; }
.unit-status.done { color: var(--success); background: #e9faf2; }
.unit-status.current { color: white; background: var(--unit-color); }

.content-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(270px, .72fr); gap: 18px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--soft-shadow); padding: 20px; }
.panel h3 { margin: 0 0 12px; }
.panel p { color: var(--muted); line-height: 1.55; }

.unit-hero { position: relative; min-height: 250px; overflow: hidden; border-radius: 28px; color: #fff; display: flex; align-items: flex-end; background: #333; box-shadow: var(--shadow); }
.unit-hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.unit-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(18,16,38,.08), rgba(22,18,53,.87)); }
.unit-hero-content { position: relative; z-index: 2; padding: 25px; width: 100%; }
.unit-hero-content h1 { margin: 5px 0 7px; font-size: clamp(27px,4vw,42px); }
.unit-hero-content p { margin: 0; color: rgba(255,255,255,.82); }
.unit-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

.tab-row { display: flex; gap: 8px; overflow-x: auto; padding: 2px 0 12px; scrollbar-width: none; }
.tab-row::-webkit-scrollbar { display: none; }
.pill-tab { flex: 0 0 auto; min-height: 42px; padding: 0 15px; border-radius: 14px; background: #f2f1f7; color: var(--muted); font-size: 13px; font-weight: 850; }
.pill-tab.active { color: #fff; background: var(--primary); }

.vocab-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.word-card { overflow: hidden; border-radius: 21px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--soft-shadow); text-align: left; }
.word-image { aspect-ratio: 16/10; background: #ecebf4; overflow: hidden; position: relative; }
.word-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .25s ease; }
.word-card:hover .word-image img { transform: scale(1.025); }
.image-fallback { position: absolute; inset: 0; display: none; place-items: center; font-size: 42px; background: linear-gradient(135deg,#ece8ff,#dcf7f2); }
.word-body { padding: 14px; }
.word-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.word-title { margin: 0; font-size: 18px; }
.ipa { color: var(--primary); font-family: "Segoe UI", sans-serif; font-size: 12px; font-weight: 750; margin-top: 2px; }
.meaning { margin: 8px 0 0; font-size: 14px; font-weight: 750; }
.example { margin: 7px 0 0; color: var(--muted); font-size: 12px; line-height: 1.45; }
.speaker-btn, .favorite-btn { width: 36px; height: 36px; border-radius: 12px; display: grid; place-items: center; background: #f2efff; color: var(--primary); }
.favorite-btn.active { color: #ef5da8; background: #ffedf5; }

.grammar-card { padding: 20px; }
.grammar-card h3 { margin: 0 0 5px; font-size: 20px; }
.pattern-box { margin: 14px 0; padding: 14px 16px; border-radius: 16px; color: var(--primary); background: #f1eeff; font-weight: 900; overflow-x: auto; }
.info-block { margin-top: 15px; }
.info-block h4 { margin: 0 0 7px; font-size: 13px; }
.info-block p { margin: 0; color: var(--muted); line-height: 1.55; }
.example-list, .mistake-list, .phrase-list { display: grid; gap: 8px; padding: 0; list-style: none; }
.example-list li, .mistake-list li, .phrase-list li { padding: 11px 13px; border-radius: 14px; background: #f7f7fb; font-size: 13px; line-height: 1.45; }
.mistake-list li { color: #a33b45; background: #fff0f2; }
.phrase-list li { display: flex; justify-content: space-between; align-items: center; gap: 10px; }

.search-bar { display: flex; gap: 10px; margin-bottom: 18px; }
.search-input { width: 100%; height: 50px; border-radius: 16px; border: 1px solid var(--line); background: var(--surface); padding: 0 16px; color: var(--ink); }
.filter-select { min-width: 150px; height: 50px; border-radius: 16px; border: 1px solid var(--line); background: var(--surface); padding: 0 12px; }

.practice-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 15px; }
.tool-card { position: relative; min-height: 180px; padding: 20px; text-align: left; overflow: hidden; }
.tool-card .tool-icon { width: 54px; height: 54px; border-radius: 18px; display: grid; place-items: center; font-size: 27px; background: var(--tool-bg,#f1eeff); }
.tool-card h3 { margin: 15px 0 6px; font-size: 17px; }
.tool-card p { margin: 0; color: var(--muted); line-height: 1.45; font-size: 13px; }
.tool-card .badge { position: absolute; top: 16px; right: 16px; }

.study-shell, .lesson-shell, .game-shell { min-height: calc(100dvh - var(--topbar-h) - var(--nav-h) - 50px); display: grid; grid-template-rows: auto 1fr auto; gap: 16px; }
.session-head { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; }
.session-progress { height: 11px; background: #e7e5f1; border-radius: 99px; overflow: hidden; }
.session-progress > div { height: 100%; border-radius: inherit; background: linear-gradient(90deg,var(--primary),var(--teal)); transition: width .25s ease; }
.session-count { color: var(--muted); font-size: 12px; font-weight: 850; white-space: nowrap; }
.session-card { width: min(720px,100%); margin: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); padding: clamp(20px,4vw,34px); }
.session-card h2 { margin: 0; font-size: clamp(23px,4vw,34px); letter-spacing: -.7px; }
.session-card .prompt { margin: 10px 0 20px; color: var(--muted); line-height: 1.55; }
.session-footer { width: min(720px,100%); margin: 0 auto; display: flex; justify-content: space-between; gap: 12px; padding-bottom: 8px; }
.session-footer .btn { min-width: 145px; }

.study-image { width: 100%; aspect-ratio: 16/9; border-radius: 22px; object-fit: cover; background: #ecebf4; }
.study-word { margin-top: 18px; display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; }
.study-word h2 { font-size: clamp(28px,6vw,48px); }
.study-word .ipa { font-size: 16px; }
.study-meaning { font-size: 18px; font-weight: 850; margin-top: 12px; }
.known-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }

.answer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; }
.answer-btn { min-height: 64px; padding: 13px 15px; text-align: left; border-radius: 17px; background: #f8f8fc; border: 2px solid var(--line); font-weight: 760; line-height: 1.35; }
.answer-btn.selected { border-color: var(--primary); background: #f0edff; }
.answer-btn.correct { border-color: var(--success); background: #eafaf3; color: #16724c; }
.answer-btn.wrong { border-color: var(--danger); background: #fff0f2; color: #a83843; }
.answer-image { width: 100%; aspect-ratio: 16/9; border-radius: 20px; object-fit: cover; margin-bottom: 18px; background: #eee; }
.typing-input { width: 100%; min-height: 58px; border-radius: 17px; border: 2px solid var(--line); padding: 0 16px; font-size: 17px; }
.order-bank, .order-answer { display: flex; flex-wrap: wrap; gap: 9px; min-height: 62px; padding: 11px; border-radius: 17px; background: #f7f7fb; margin-top: 12px; }
.order-answer { border: 2px dashed #d9d5e8; background: white; }
.word-token { padding: 10px 13px; border-radius: 12px; background: white; border: 1px solid var(--line); box-shadow: 0 3px 8px rgba(30,25,63,.06); font-weight: 800; }
.listen-box, .speak-box { padding: 19px; border-radius: 21px; background: linear-gradient(135deg,#f0edff,#eafaf6); display: flex; align-items: center; gap: 15px; margin-bottom: 18px; }
.big-speaker { width: 66px; height: 66px; border-radius: 22px; display: grid; place-items: center; font-size: 29px; background: var(--primary); color: white; box-shadow: 0 10px 20px rgba(115,87,255,.25); flex: 0 0 auto; }
.listen-copy b { display: block; font-size: 15px; }
.listen-copy small { color: var(--muted); }
.speech-target { font-size: clamp(22px,4vw,33px); font-weight: 900; line-height: 1.25; }
.speech-result { margin-top: 14px; padding: 13px; border-radius: 15px; background: #f7f7fb; color: var(--muted); min-height: 48px; }
.speech-feedback { margin-top: 10px; font-size: 13px; line-height: 1.5; }
.feedback-bar { width: 100%; height: 10px; border-radius: 99px; background: #e8e6f1; overflow: hidden; margin-top: 12px; }
.feedback-bar > div { height: 100%; background: linear-gradient(90deg,var(--danger),var(--warning),var(--success)); }
.result-box { margin-top: 14px; padding: 15px; border-radius: 17px; background: #f7f7fb; }
.result-box.correct { color: #136d48; background: #eafaf3; }
.result-box.wrong { color: #a73944; background: #fff0f2; }

.match-board { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.match-column { display: grid; gap: 10px; }
.match-tile { min-height: 56px; border-radius: 16px; padding: 11px 12px; background: var(--surface); border: 2px solid var(--line); font-weight: 800; text-align: left; }
.match-tile.selected { border-color: var(--primary); background: #f0edff; }
.match-tile.matched { opacity: .25; pointer-events: none; }

.crossword-wrap { overflow: auto; padding: 4px; }
.crossword-grid { --cell: 34px; display: grid; gap: 2px; width: max-content; margin: 0 auto; }
.cross-cell { width: var(--cell); height: var(--cell); position: relative; }
.cross-cell.empty { background: transparent; }
.cross-cell input { width: 100%; height: 100%; border: 1px solid #d8d5e6; border-radius: 5px; text-align: center; text-transform: uppercase; font-weight: 900; background: #fff; padding: 0; }
.cross-cell input.good { background: #e7faef; color: #17734d; border-color: var(--success); }
.cross-cell input.bad { background: #fff0f2; color: #a83843; border-color: var(--danger); }
.cell-number { position: absolute; z-index: 2; top: 1px; left: 3px; font-size: 7px; color: var(--muted); pointer-events: none; }
.clue-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 18px; }
.clue-grid h4 { margin: 0 0 8px; }
.clue-grid ol { margin: 0; padding-left: 22px; color: var(--muted); font-size: 12px; line-height: 1.6; }

.roleplay-chat { display: grid; gap: 13px; margin: 18px 0; }
.chat-row { display: flex; gap: 9px; align-items: flex-end; }
.chat-row.user { justify-content: flex-end; }
.avatar { width: 36px; height: 36px; border-radius: 13px; display: grid; place-items: center; background: #f1eeff; }
.chat-bubble { max-width: 78%; padding: 12px 14px; border-radius: 17px 17px 17px 5px; background: #f3f2f8; line-height: 1.45; font-size: 14px; }
.chat-row.user .chat-bubble { color: #fff; background: var(--primary); border-radius: 17px 17px 5px 17px; }

.stats-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 13px; }
.stat-card { padding: 18px; }
.stat-card small { color: var(--muted); font-weight: 750; }
.stat-card strong { display: block; margin-top: 9px; font-size: 27px; }
.stat-card span { display: block; margin-top: 3px; font-size: 11px; color: var(--muted); }
.week-chart { display: grid; grid-template-columns: repeat(7,1fr); gap: 9px; align-items: end; height: 180px; padding-top: 20px; }
.day-bar { display: grid; justify-items: center; gap: 7px; height: 100%; }
.day-bar-track { width: min(38px,70%); height: 100%; border-radius: 12px; background: #f0eff5; position: relative; overflow: hidden; }
.day-bar-fill { position: absolute; left: 0; right: 0; bottom: 0; min-height: 4px; border-radius: 12px; background: linear-gradient(180deg,var(--primary-2),var(--primary)); }
.day-bar b { font-size: 10px; color: var(--muted); }
.error-list { display: grid; gap: 10px; }
.error-item { display: grid; grid-template-columns: auto minmax(0,1fr) auto; gap: 12px; align-items: center; padding: 13px; border-radius: 16px; background: #f8f8fb; }
.error-icon { width: 40px; height: 40px; border-radius: 13px; display: grid; place-items: center; background: #fff0f2; }
.error-item b { display: block; font-size: 13px; }
.error-item small { display: block; margin-top: 3px; color: var(--muted); line-height: 1.35; }
.mastery-row { display: grid; grid-template-columns: 120px 1fr auto; gap: 12px; align-items: center; margin: 11px 0; }
.mastery-row b { font-size: 12px; }
.mastery-track { height: 9px; border-radius: 99px; background: #efedf5; overflow: hidden; }
.mastery-track div { height: 100%; border-radius: inherit; background: var(--level-color,var(--primary)); }

.empty-state { padding: 42px 20px; text-align: center; border: 1px dashed #d8d5e8; border-radius: 22px; color: var(--muted); }
.empty-state span { display: block; font-size: 42px; margin-bottom: 10px; }

.modal-backdrop { position: fixed; z-index: 100; inset: 0; background: rgba(21,18,42,.54); display: grid; place-items: end center; padding: 18px; backdrop-filter: blur(5px); }
.modal { width: min(640px,100%); max-height: min(86dvh,850px); overflow: auto; border-radius: 28px; background: var(--surface); box-shadow: 0 30px 80px rgba(15,12,37,.35); padding: 22px; animation: modalIn .2s ease; }
@keyframes modalIn { from { transform: translateY(18px); opacity: 0; } }
.modal-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; }
.modal-head h2 { margin: 0; }
.modal-head p { margin: 5px 0 0; color: var(--muted); }
.setting-row { display: flex; justify-content: space-between; align-items: center; gap: 15px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.setting-row label b { display: block; }
.setting-row label small { display: block; margin-top: 3px; color: var(--muted); }
.setting-row select, .setting-row input { min-height: 42px; border: 1px solid var(--line); border-radius: 13px; padding: 0 11px; background: white; }

.toast { position: fixed; z-index: 150; left: 50%; bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 22px); transform: translate(-50%,18px); opacity: 0; pointer-events: none; max-width: calc(100% - 32px); padding: 12px 16px; border-radius: 14px; color: #fff; background: #25223a; box-shadow: var(--shadow); font-weight: 750; font-size: 13px; transition: .2s ease; }
.toast.show { opacity: 1; transform: translate(-50%,0); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-panel { display: flex; align-items: center; gap: 18px; }
  .goal-ring { width: 108px; flex: 0 0 auto; margin: 0; }
  .hero-mini { flex: 1; display: grid; gap: 8px; }
  .quick-grid { grid-template-columns: repeat(2,1fr); }
  .content-grid { grid-template-columns: 1fr; }
  .vocab-grid { grid-template-columns: repeat(2,1fr); }
  .practice-grid { grid-template-columns: repeat(2,1fr); }
  .stats-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 620px) {
  :root { --topbar-h: 62px; --nav-h: 70px; --radius: 20px; }
  .topbar { padding-left: 12px; padding-right: 12px; }
  .brand-mark { width: 38px; height: 38px; border-radius: 13px; font-size: 20px; }
  .brand-copy small { display: none; }
  .brand-copy b { font-size: 16px; }
  .top-stats { gap: 5px; }
  .stat-chip { min-width: 43px; height: 37px; padding: 0 7px; border-radius: 12px; gap: 4px; }
  .stat-chip span { font-size: 14px; }
  .stat-chip b { font-size: 12px; }
  .main-view { padding-left: 12px; padding-right: 12px; padding-top: calc(var(--topbar-h) + env(safe-area-inset-top) + 14px); }
  .bottom-nav { width: calc(100% - 12px); bottom: max(5px, env(safe-area-inset-bottom)); border-radius: 22px; padding: 6px; }
  .nav-item { height: 53px; border-radius: 15px; }
  .nav-item span { font-size: 19px; }
  .nav-item small { font-size: 9px; }
  .nav-focus { transform: translateY(-13px); border-width: 4px; }
  .hero { border-radius: 24px; padding: 22px 18px; min-height: 0; }
  .hero h1 { font-size: 31px; letter-spacing: -1.2px; }
  .hero p { font-size: 13px; margin: 11px 0 17px; }
  .hero-panel { padding: 13px; border-radius: 19px; }
  .goal-ring { width: 88px; }
  .goal-ring strong { font-size: 20px; }
  .btn { min-height: 46px; border-radius: 15px; padding: 0 15px; font-size: 14px; }
  .quick-grid { gap: 10px; }
  .quick-card { min-height: 128px; padding: 15px; border-radius: 19px; }
  .quick-icon { width: 42px; height: 42px; }
  .level-tab { min-width: 112px; padding: 11px 12px; }
  .level-banner { display: block; padding: 16px; border-radius: 19px; }
  .level-progress { width: 100%; margin-top: 13px; }
  .unit-card { padding: 13px; gap: 11px; border-radius: 19px; }
  .unit-icon { width: 49px; height: 49px; font-size: 23px; border-radius: 16px; }
  .unit-copy b { font-size: 14px; }
  .unit-copy small { font-size: 11px; }
  .unit-status { width: 42px; height: 42px; border-radius: 14px; font-size: 12px; }
  .vocab-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
  .word-card { border-radius: 17px; }
  .word-body { padding: 11px; }
  .word-title { font-size: 15px; }
  .meaning { font-size: 12px; }
  .example { display: none; }
  .speaker-btn, .favorite-btn { width: 32px; height: 32px; }
  .practice-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .tool-card { min-height: 162px; padding: 15px; border-radius: 19px; }
  .tool-card h3 { font-size: 15px; }
  .tool-card p { font-size: 11px; }
  .stats-grid { gap: 9px; }
  .stat-card { padding: 14px; border-radius: 18px; }
  .stat-card strong { font-size: 23px; }
  .session-card { border-radius: 22px; padding: 18px 15px; }
  .session-head { grid-template-columns: auto 1fr; }
  .session-count { grid-column: 1 / -1; text-align: center; margin-top: -7px; }
  .session-footer { position: sticky; bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 4px); z-index: 8; padding: 8px; border-radius: 18px; background: rgba(247,247,252,.92); backdrop-filter: blur(12px); }
  .session-footer .btn { min-width: 0; flex: 1; }
  .answer-grid { grid-template-columns: 1fr; gap: 9px; }
  .answer-btn { min-height: 55px; }
  .known-actions { grid-template-columns: 1fr 1fr; }
  .study-image { aspect-ratio: 4/3; }
  .match-board { gap: 8px; }
  .match-tile { min-height: 50px; padding: 9px; font-size: 12px; }
  .crossword-grid { --cell: min(31px, calc((100vw - 42px) / 11)); }
  .clue-grid { grid-template-columns: 1fr; }
  .chat-bubble { max-width: 86%; }
  .modal-backdrop { padding: 7px; }
  .modal { border-radius: 24px 24px 14px 14px; padding: 18px 15px; max-height: 90dvh; }
  .search-bar { display: grid; }
  .filter-select { width: 100%; }
}

@media (max-width: 390px) {
  .brand-copy { display: none; }
  .quick-grid, .practice-grid { grid-template-columns: 1fr 1fr; }
  .quick-card { min-height: 122px; }
  .unit-meta .badge:nth-child(n+3) { display: none; }
  .vocab-grid { grid-template-columns: 1fr; }
  .word-card { display: grid; grid-template-columns: 120px 1fr; }
  .word-image { aspect-ratio: auto; min-height: 128px; }
  .word-body { align-self: center; }
  .example { display: block; font-size: 10px; }
}

@media (orientation: landscape) and (max-height: 520px) {
  :root { --topbar-h: 54px; --nav-h: 62px; }
  .brand-mark { width: 34px; height: 34px; }
  .main-view { padding-top: calc(var(--topbar-h) + 10px); }
  .bottom-nav { height: 58px; }
  .nav-item { height: 45px; }
  .nav-focus { transform: translateY(-8px); }
  .session-card { padding: 16px; }
  .study-shell, .lesson-shell, .game-shell { min-height: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

body.session-active .bottom-nav { display: none; }
body.session-active .main-view { padding-bottom: 18px; }