@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');

:root {
  color-scheme: dark;
  --bg: #0d1713;
  --sidebar: #13221c;
  --panel: #172a22;
  --panel-2: #1d332a;
  --panel-3: #244035;
  --text: #f5f6ed;
  --muted: #9bafa5;
  --line: #294238;
  --accent: #d9ff5b;
  --accent-ink: #17200a;
  --orange: #ff7a4d;
  --blue: #78bfff;
  --danger: #ff766e;
  --shadow: 0 18px 60px #0208064d;
  --radius: 18px;
  --sidebar-width: 244px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #eef1e8;
  --sidebar: #f7f8f1;
  --panel: #ffffff;
  --panel-2: #f1f4e9;
  --panel-3: #e5eadc;
  --text: #15221c;
  --muted: #687970;
  --line: #d7ded3;
  --accent: #acd72e;
  --accent-ink: #17200a;
  --orange: #e85c32;
  --blue: #277bc0;
  --danger: #d64943;
  --shadow: 0 18px 60px #2d3b3420;
}

* { box-sizing: border-box; }
html { height: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', 'Noto Sans KR', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
button, a, label { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
[hidden] { display: none !important; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 100; background: var(--accent); color: var(--accent-ink); padding: 10px 14px; border-radius: 8px; }
.skip-link:focus { top: 12px; }
kbd { border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; background: var(--panel-2); color: var(--muted); padding: 1px 5px; font-size: 10px; }

.app-shell { min-height: 100vh; }
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 40;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 22px;
  background: color-mix(in srgb, var(--sidebar) 94%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; min-width: 184px; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border: 2px solid var(--accent); border-radius: 50%; color: var(--accent); font-weight: 800; }
.brand > span:last-child { display: flex; flex-direction: column; line-height: 1; }
.brand strong { font-size: 16px; letter-spacing: .02em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 8px; letter-spacing: .2em; }
.session-meter { display: flex; align-items: center; gap: 10px; margin-left: auto; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.session-meter i { display: block; width: 92px; height: 4px; border-radius: 9px; background: var(--panel-3); overflow: hidden; }
.session-meter b { display: block; width: 0; height: 100%; background: var(--accent); transition: width .3s; }
.top-actions { display: flex; gap: 8px; }
.icon-button, .soft-button, .primary-button, .danger-button, .tool-button, .nav-button, .practice-navigation button {
  border: 1px solid var(--line);
  background: var(--panel-2);
  cursor: pointer;
}
.icon-button { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 11px; font-size: 18px; text-decoration: none; }
.icon-button:hover, .soft-button:hover, .tool-button:hover { border-color: var(--accent); }
.soft-button, .primary-button, .danger-button { min-height: 42px; padding: 0 16px; border-radius: 11px; font-weight: 650; }
.soft-button.compact { min-height: 38px; font-size: 12px; }
.primary-button { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.primary-button:hover { filter: brightness(1.05); }
.primary-button.full { width: 100%; margin-top: 8px; }
.danger-button { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 36%, var(--line)); }
.menu-button { display: none; }

.workspace { display: grid; grid-template-columns: var(--sidebar-width) minmax(0, 1fr); padding-top: 68px; min-height: 100vh; }
.sidebar {
  position: fixed;
  z-index: 30;
  top: 68px;
  bottom: 0;
  left: 0;
  width: var(--sidebar-width);
  padding: 22px 14px;
  border-right: 1px solid var(--line);
  background: var(--sidebar);
  overflow-y: auto;
}
.main-nav { display: grid; gap: 5px; }
.nav-button { width: 100%; min-height: 44px; border-color: transparent; background: transparent; display: flex; align-items: center; gap: 12px; padding: 0 13px; border-radius: 11px; color: var(--muted); text-align: left; font-size: 13px; }
.nav-button span { width: 20px; color: var(--muted); font-size: 18px; text-align: center; }
.nav-button b { margin-left: auto; min-width: 22px; padding: 2px 6px; border-radius: 20px; background: var(--panel-3); font-size: 10px; text-align: center; }
.nav-button:hover { background: var(--panel-2); color: var(--text); }
.nav-button.active { background: var(--accent); color: var(--accent-ink); font-weight: 700; }
.nav-button.active span { color: var(--accent-ink); }
.nav-button.active b { background: #17200a24; }
.side-progress { margin: 28px 8px 0; padding-top: 20px; border-top: 1px solid var(--line); }
.side-progress > div:first-child { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); }
.side-progress strong { color: var(--text); }
.progress-track { height: 6px; margin: 10px 0; background: var(--panel-3); border-radius: 20px; overflow: hidden; }
.progress-track i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .25s; }
.side-progress small { color: var(--muted); font-size: 10px; }
.shortcut-card { margin: 18px 8px; padding: 13px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel-2); }
.shortcut-card > span { color: var(--accent); font-size: 10px; letter-spacing: .12em; }
.shortcut-card p { margin: 8px 0 0; color: var(--muted); font-size: 10px; }
.sidebar-scrim { display: none; }
.main-content { grid-column: 2; width: 100%; min-width: 0; padding: 38px clamp(24px, 4vw, 68px) 100px; outline: none; }
.view { max-width: 1200px; margin: 0 auto; }
.loading-view { min-height: 65vh; display: grid; place-items: center; align-content: center; gap: 15px; color: var(--muted); font-size: 13px; }
.loader { width: 34px; height: 34px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.page-heading { display: flex; justify-content: space-between; gap: 30px; align-items: flex-end; margin-bottom: 28px; }
.eyebrow { margin: 0 0 10px; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: .18em; }
.page-heading h1 { max-width: 760px; margin: 0; font-size: clamp(30px, 4.4vw, 56px); line-height: 1.08; letter-spacing: -.045em; }
.page-heading h1 em { color: var(--accent); font-style: normal; }
.page-heading p:not(.eyebrow) { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.compact-heading { align-items: center; }
.compact-heading h1 { font-size: clamp(30px, 4vw, 46px); }
.summary-chip { flex: none; padding: 10px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--muted); font-size: 11px; }
.summary-chip strong { display: block; color: var(--text); font-size: 18px; }
.library-tools { position: sticky; z-index: 15; top: 82px; display: flex; gap: 12px; align-items: center; margin-bottom: 22px; padding: 8px; border: 1px solid var(--line); border-radius: 15px; background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(14px); }
.search-box { height: 44px; flex: 1; min-width: 220px; display: flex; align-items: center; gap: 10px; padding: 0 12px; border-radius: 10px; background: var(--panel); }
.search-box span { color: var(--accent); font-size: 21px; }
.search-box input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--text); }
.search-box input::placeholder { color: var(--muted); }
.filter-row { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; }
.filter-row::-webkit-scrollbar { display: none; }
.filter-row button { flex: none; height: 36px; padding: 0 12px; border: 1px solid transparent; border-radius: 9px; background: transparent; color: var(--muted); cursor: pointer; font-size: 11px; }
.filter-row button:hover { color: var(--text); }
.filter-row button.active { border-color: var(--line); background: var(--panel-2); color: var(--text); }
.topic-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.topic-card { min-height: 204px; display: flex; flex-direction: column; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); transition: transform .16s, border-color .16s, box-shadow .16s; cursor: pointer; }
.topic-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 54%, var(--line)); box-shadow: var(--shadow); }
.topic-card-head { display: flex; justify-content: space-between; align-items: center; }
.category-tag { display: inline-flex; align-items: center; min-height: 24px; padding: 0 8px; border-radius: 7px; background: var(--panel-3); color: var(--muted); font-size: 9px; font-weight: 700; letter-spacing: .08em; }
.card-star { border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 19px; }
.card-star.active { color: var(--accent); }
.topic-card h2 { margin: 18px 0 5px; font-size: 18px; line-height: 1.3; letter-spacing: -.02em; }
.topic-card .title-en { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.35; }
.topic-card-foot { display: flex; justify-content: space-between; align-items: flex-end; gap: 10px; margin-top: auto; padding-top: 16px; }
.topic-card-foot span { color: var(--muted); font-size: 10px; }
.topic-card-foot strong { color: var(--accent); font-size: 11px; }
.mini-progress { width: 76px; height: 4px; margin-top: 7px; border-radius: 5px; background: var(--panel-3); overflow: hidden; }
.mini-progress i { display: block; height: 100%; background: var(--accent); }
.empty-state { padding: 80px 20px; text-align: center; color: var(--muted); }
.empty-state strong { color: var(--text); font-size: 18px; }
.empty-state p { font-size: 13px; }

.pattern-heading em { color: var(--accent); font-style: normal; }
.pattern-heading .primary-button { flex: none; }
.pattern-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 9px; margin: -8px 0 20px; }
.pattern-summary > div, .pattern-summary > span { min-height: 76px; display: flex; flex-direction: column; justify-content: center; padding: 12px 15px; border: 1px solid var(--line); border-radius: 13px; background: var(--panel); }
.pattern-summary strong, .pattern-summary b { color: var(--accent); font-size: 20px; }
.pattern-summary small, .pattern-summary span { color: var(--muted); font-size: 10px; }
.pattern-summary > span b { display: block; }
.pattern-tools { top: 82px; }
.pattern-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.pattern-card { min-height: 275px; display: flex; flex-direction: column; padding: 19px; border: 1px solid var(--line); border-radius: 17px; background: var(--panel); }
.pattern-card.mastered { border-color: color-mix(in srgb, var(--accent) 52%, var(--line)); }
.pattern-card-head { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 9px; }
.pattern-card-head span { padding: 4px 7px; border-radius: 6px; background: var(--panel-3); color: var(--accent); font-weight: 700; }
.pattern-card-head b { font-weight: 500; }
.pattern-card h2 { margin: 17px 0 6px; font-size: 20px; line-height: 1.35; }
.pattern-card > p { margin: 0; color: var(--muted); font-size: 12px; }
.pattern-card blockquote { display: grid; gap: 4px; margin: 16px 0; padding: 12px; border: 0; border-left: 2px solid var(--blue); border-radius: 0 9px 9px 0; background: var(--panel-2); }
.pattern-card blockquote strong, .pattern-card blockquote span { display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; }
.pattern-card blockquote strong { color: var(--text); font-size: 11px; line-height: 1.55; -webkit-line-clamp: 3; }
.pattern-card blockquote span { color: var(--muted); font-size: 10px; line-height: 1.45; -webkit-line-clamp: 2; }
.pattern-card-actions { display: flex; justify-content: space-between; gap: 8px; margin-top: auto; }
.pattern-card-actions button { min-height: 36px; padding: 0 11px; border: 1px solid var(--line); border-radius: 9px; background: var(--panel-2); color: var(--muted); cursor: pointer; font-size: 10px; }
.pattern-card-actions button:last-child { margin-left: auto; border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); color: var(--accent); }
.pattern-card-actions button:hover { border-color: var(--accent); color: var(--text); }
.load-more-patterns { width: min(360px, 100%); display: block; margin: 20px auto 0; }
.pattern-quiz { max-width: 850px; margin: 0 auto; }
.pattern-quiz-head { display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-bottom: 14px; }
.pattern-quiz-head > div { min-width: 220px; display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 11px; }
.pattern-quiz-head i { flex: 1; height: 6px; border-radius: 10px; background: var(--panel-3); overflow: hidden; }
.pattern-quiz-head i b { display: block; height: 100%; background: var(--accent); transition: width .2s; }
.pattern-study-card { min-height: 500px; display: flex; flex-direction: column; justify-content: center; padding: clamp(30px, 6vw, 64px); border: 1px solid var(--line); border-radius: 22px; background: radial-gradient(circle at 82% 12%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 34%), var(--panel); box-shadow: var(--shadow); }
.pattern-quiz-meta { display: flex; justify-content: space-between; margin-bottom: 18px; color: var(--muted); font-size: 10px; }
.pattern-quiz-meta span { color: var(--accent); font-weight: 700; letter-spacing: .1em; }
.pattern-stage-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; margin-bottom: 28px; }
.pattern-stage-track span { min-height: 34px; display: flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--line); border-radius: 9px; background: var(--panel-2); color: var(--muted); font-size: 9px; }
.pattern-stage-track b { width: 17px; height: 17px; display: grid; place-items: center; border-radius: 50%; background: var(--panel-3); font-size: 8px; }
.pattern-stage-track span.active { border-color: var(--accent); color: var(--text); }
.pattern-stage-track span.active b { background: var(--accent); color: var(--accent-ink); }
.pattern-stage-track span.done { color: var(--accent); }
.pattern-stage-track span.done b { background: color-mix(in srgb, var(--accent) 28%, var(--panel-3)); color: var(--accent); }
.pattern-prompt-label { display: block; margin-bottom: 7px; color: var(--blue); font-size: 10px; }
.pattern-quiz-meaning { margin: 0 0 24px; color: var(--muted); font: 600 clamp(20px, 3vw, 28px)/1.5 'Noto Sans KR', sans-serif; }
.pattern-quiz-answer { min-height: 80px; color: var(--text); font-size: clamp(28px, 5vw, 46px); font-weight: 700; line-height: 1.25; letter-spacing: -.025em; }
.pattern-quiz-answer.concealed { color: transparent; background: repeating-linear-gradient(90deg, var(--panel-3) 0 70px, transparent 70px 78px); border-radius: 7px; user-select: none; }
.pattern-quiz-details { margin-top: 24px; }
.pattern-quiz-details > p { margin: 0 0 13px; color: var(--accent); font-size: 11px; line-height: 1.55; }
.pattern-quiz-details blockquote { display: grid; gap: 6px; margin: 0; padding: 15px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel-2); }
.pattern-quiz-details blockquote strong { font-size: 13px; line-height: 1.55; }
.pattern-quiz-details blockquote span { color: var(--muted); font-size: 11px; }
.pattern-quiz-details blockquote small { color: var(--blue); font-size: 9px; }
.pattern-audio-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 11px 0; }
.pattern-audio-actions .tool-button { min-height: 48px; border-radius: 11px; }
.pattern-rating { display: grid; grid-template-columns: 1fr 160px 160px; gap: 8px; align-items: center; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.pattern-rating p { margin: 0; color: var(--muted); font-size: 11px; }
.pattern-rating button { min-height: 46px; display: flex; align-items: center; justify-content: center; gap: 7px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); cursor: pointer; }
.pattern-rating button:last-child { border-color: var(--accent); color: var(--accent); }
.pattern-rating button span { color: var(--accent); }
.pattern-rating strong { font-size: 11px; }

.practice-view { max-width: 960px; }
.practice-head { display: flex; align-items: center; gap: 15px; }
.practice-title { min-width: 0; flex: 1; }
.practice-title span { color: var(--accent); font-size: 9px; font-weight: 700; letter-spacing: .15em; }
.practice-title h1 { overflow: hidden; margin: 3px 0 0; font-size: clamp(20px, 3vw, 28px); white-space: nowrap; text-overflow: ellipsis; }
.practice-title p { overflow: hidden; margin: 3px 0 0; color: var(--muted); font-size: 11px; white-space: nowrap; text-overflow: ellipsis; }
.star-button.active { color: var(--accent); }
.practice-config { display: flex; gap: 12px; margin: 20px 0 14px; }
.practice-config > label { min-width: 260px; display: flex; align-items: center; gap: 10px; padding: 0 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--muted); font-size: 10px; }
.practice-config select { flex: 1; min-width: 0; height: 42px; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 12px; }
.practice-config option, .settings-dialog option { background: var(--panel); }
.mode-tabs { display: flex; flex: 1; padding: 4px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.mode-tabs button { flex: 1; min-width: 65px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; font-size: 11px; }
.mode-tabs button.active { background: var(--panel-3); color: var(--text); font-weight: 700; }
.question-card { position: relative; margin: 14px 0; padding: 14px 18px; border-left: 3px solid var(--orange); border-radius: 0 12px 12px 0; background: color-mix(in srgb, var(--orange) 7%, var(--panel)); }
.question-card > span { color: var(--orange); font-size: 9px; font-weight: 700; letter-spacing: .14em; }
.question-card p { margin: 6px 0 0; font-size: 12px; }
.question-card p:last-child { color: var(--muted); }
.sentence-map-wrap { margin: 14px 0 10px; }
.sentence-map-head { display: flex; justify-content: space-between; margin-bottom: 7px; color: var(--muted); font-size: 10px; }
.sentence-map-head strong { color: var(--text); font-variant-numeric: tabular-nums; }
.sentence-map { display: flex; gap: 3px; height: 6px; }
.sentence-map button { flex: 1; min-width: 2px; padding: 0; border: 0; border-radius: 4px; background: var(--panel-3); cursor: pointer; }
.sentence-map button.rated { background: color-mix(in srgb, var(--accent) 52%, var(--panel-3)); }
.sentence-map button.current { background: var(--accent); transform: scaleY(1.6); }
.study-card { position: relative; min-height: 330px; display: flex; flex-direction: column; justify-content: center; margin-top: 13px; padding: clamp(28px, 5vw, 52px); border: 1px solid var(--line); border-radius: 22px; background: radial-gradient(circle at 85% 10%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 35%), var(--panel); box-shadow: var(--shadow); overflow: hidden; }
.sentence-star { position: absolute; top: 17px; right: 18px; border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 22px; }
.sentence-star.active { color: var(--accent); }
.study-label { position: absolute; top: 21px; left: clamp(28px, 5vw, 52px); display: flex; gap: 9px; align-items: center; color: var(--accent); font-size: 9px; font-weight: 700; letter-spacing: .14em; }
.study-label b { padding: 3px 6px; border-radius: 6px; background: var(--panel-3); color: var(--muted); font-size: 8px; }
.korean-text { max-width: 780px; margin: 5px 0 20px; color: var(--muted); font: 500 clamp(17px, 2.5vw, 22px)/1.65 'Noto Sans KR', sans-serif; }
.english-text { max-width: 820px; margin: 0; font-size: clamp(25px, 4.3vw, 42px); font-weight: 650; line-height: 1.27; letter-spacing: -.025em; transition: filter .16s, opacity .16s; }
.english-text.concealed { height: 1.25em; color: transparent; background: repeating-linear-gradient(90deg, var(--panel-3) 0 48px, transparent 48px 54px); border-radius: 5px; user-select: none; }
.english-text.cloze-line { font-size: clamp(21px, 3.5vw, 34px); }
.blank-token { display: inline-block; min-width: 42px; margin: 0 2px; border-bottom: 2px solid var(--accent); color: transparent; }
.hint-text { margin: -5px 0 18px; padding: 10px 12px; border-radius: 9px; background: var(--panel-2); color: var(--blue); font-size: 14px; letter-spacing: .08em; }
.answer-area { position: relative; }
.reveal-button { min-height: 44px; margin-top: 18px; padding: 0 16px; border: 1px solid var(--accent); border-radius: 10px; background: transparent; color: var(--accent); cursor: pointer; font-size: 12px; }
.dictation-area label { display: block; margin-bottom: 7px; color: var(--muted); font-size: 11px; }
.dictation-area textarea { width: 100%; resize: vertical; border: 1px solid var(--line); border-radius: 12px; outline: 0; padding: 14px; background: var(--panel-2); color: var(--text); font-size: 18px; line-height: 1.5; }
.dictation-area textarea:focus { border-color: var(--accent); }
.dictation-actions { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.dictation-actions span { color: var(--accent); font-weight: 700; }
.dictation-diff, .speech-result { margin-top: 13px; padding: 12px; border-radius: 10px; background: var(--panel-2); font-size: 13px; line-height: 1.7; }
.word-correct { color: var(--text); }
.word-wrong { color: var(--danger); text-decoration: line-through; }
.speech-result strong { color: var(--accent); }
.pronunciation-coach { display: grid; grid-template-columns: 1fr auto; gap: 16px; margin-top: 18px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel-2); }
.pronunciation-coach span { color: var(--accent); font-size: 8px; font-weight: 700; letter-spacing: .15em; }
.pronunciation-coach p { margin: 7px 0 4px; color: var(--blue); font-size: 15px; line-height: 1.6; }
.pronunciation-coach p strong { color: var(--accent); font-weight: 800; }
.pronunciation-coach .liaison { color: var(--warm); font-style: normal; font-weight: 800; }
.pronunciation-coach small { color: var(--muted); font-size: 10px; }
.word-tips { display: flex; flex-wrap: wrap; justify-content: flex-end; align-content: center; gap: 5px; max-width: 330px; }
.word-tips button { min-height: 32px; padding: 4px 9px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--text); cursor: pointer; font-size: 10px; }
.word-tips button b { color: var(--accent); }
.word-tips button strong { color: var(--warm); }
.pron-word { display: inline; margin: 0; padding: 0 1px; border: 0; border-radius: 4px; background: transparent; color: inherit; cursor: pointer; font: inherit; text-align: left; }
.pron-word:hover { background: var(--panel-3); color: var(--accent); }
.pron-word.stress { color: var(--accent); font-weight: 800; }
#recordingPlayback { width: 100%; margin-top: 15px; height: 36px; }
.audio-toolbar { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 7px; margin: 12px 0; }
.tool-button { min-height: 46px; border-radius: 11px; color: var(--muted); font-size: 10px; }
.tool-button span { display: inline-block; margin-right: 5px; color: var(--accent); }
.tool-button.active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--panel-2)); color: var(--text); }
.tool-button.recording { border-color: var(--danger); color: var(--danger); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .55; } }
.rating-panel { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 12px 0; padding: 14px 17px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.rating-panel > p { margin: 0; color: var(--muted); font-size: 11px; }
.rating-panel > div { display: flex; gap: 7px; }
.rating-panel button { min-width: 100px; display: grid; grid-template-columns: 20px 1fr; gap: 0 7px; padding: 7px 9px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); cursor: pointer; text-align: left; }
.rating-panel button:hover { border-color: var(--accent); }
.rating-panel button > span { grid-row: 1 / 3; align-self: center; width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; background: var(--panel-3); color: var(--muted); font-size: 9px; }
.rating-panel strong { font-size: 11px; }
.rating-panel small { color: var(--muted); font-size: 8px; }
.practice-navigation { display: flex; justify-content: space-between; gap: 10px; margin-top: 12px; }
.practice-navigation button { min-height: 46px; min-width: 145px; border-radius: 11px; color: var(--muted); font-size: 11px; }
.practice-navigation button:hover { border-color: var(--accent); color: var(--text); }
.topic-notes { margin-top: 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.topic-notes summary { padding: 15px 17px; cursor: pointer; color: var(--muted); font-size: 11px; }
.topic-notes > div { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; padding: 0 18px 18px; }
.topic-notes h3 { margin: 8px 0; color: var(--accent); font-size: 11px; }
.topic-notes ul { margin: 0; padding-left: 18px; }
.topic-notes li { margin: 7px 0; color: var(--muted); font-size: 11px; }
.topic-notes b { color: var(--text); }

.collection-list { display: grid; gap: 9px; }
.collection-item { display: grid; grid-template-columns: 42px 1fr auto; gap: 13px; align-items: center; min-height: 76px; padding: 10px 15px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); cursor: pointer; }
.collection-item:hover { border-color: var(--accent); }
.collection-index { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 10px; background: var(--panel-2); color: var(--accent); font-size: 11px; }
.collection-item h3 { margin: 0; font-size: 14px; }
.collection-item p { margin: 3px 0 0; color: var(--muted); font-size: 11px; }
.collection-item > span:last-child { color: var(--muted); font-size: 10px; }

.stats-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat-card { min-height: 130px; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.stat-card span { color: var(--muted); font-size: 10px; }
.stat-card strong { display: block; margin-top: 17px; color: var(--accent); font-size: 28px; }
.stat-card small { color: var(--muted); font-size: 9px; }
.stats-panel { margin-top: 14px; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.panel-heading { display: flex; justify-content: space-between; align-items: center; }
.panel-heading h2, .data-tools h2 { margin: 0; font-size: 15px; }
.panel-heading span { color: var(--muted); font-size: 9px; }
.week-chart { height: 150px; display: grid; grid-template-columns: repeat(7, 1fr); gap: 14px; align-items: end; margin-top: 22px; }
.chart-day { height: 100%; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 7px; }
.chart-day i { width: min(42px, 80%); min-height: 3px; border-radius: 6px 6px 2px 2px; background: var(--accent); }
.chart-day strong { font-size: 10px; }
.chart-day span { color: var(--muted); font-size: 9px; }
.category-stat { display: grid; grid-template-columns: 85px 1fr 42px; gap: 12px; align-items: center; margin-top: 14px; font-size: 11px; }
.category-stat > i { height: 7px; border-radius: 8px; background: var(--panel-3); overflow: hidden; }
.category-stat > i b { display: block; height: 100%; background: var(--accent); }
.category-stat strong { text-align: right; color: var(--muted); font-size: 10px; }
.data-tools { display: flex; justify-content: space-between; gap: 30px; align-items: center; margin-top: 14px; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.data-tools p { margin: 5px 0 0; color: var(--muted); font-size: 10px; }
.data-tools > div:last-child { display: flex; gap: 7px; }
.file-button { display: inline-flex; align-items: center; cursor: pointer; }
.file-button input { display: none; }

.settings-dialog { width: min(500px, calc(100% - 28px)); padding: 0; border: 1px solid var(--line); border-radius: 19px; background: var(--panel); color: var(--text); box-shadow: 0 30px 100px #000b; }
.settings-dialog::backdrop { background: #030806b5; backdrop-filter: blur(5px); }
.settings-dialog form { display: grid; gap: 17px; padding: 22px; }
.dialog-head { display: flex; justify-content: space-between; align-items: flex-start; }
.dialog-head span { color: var(--accent); font-size: 9px; letter-spacing: .14em; }
.dialog-head h2 { margin: 3px 0 0; font-size: 23px; }
.settings-dialog form > label { display: grid; gap: 8px; color: var(--muted); font-size: 11px; }
.settings-dialog select { height: 42px; padding: 0 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); color: var(--text); }
.range-row { display: grid; grid-template-columns: 1fr 54px; gap: 12px; align-items: center; }
.range-row input { accent-color: var(--accent); }
.range-row output { padding: 5px; border-radius: 7px; background: var(--panel-2); color: var(--text); text-align: center; font-size: 10px; }
.toggle-row { display: flex; justify-content: space-between; align-items: center; }
.toggle-row span { display: flex; flex-direction: column; }
.toggle-row strong { font-size: 11px; }
.toggle-row small { margin-top: 3px; color: var(--muted); font-size: 9px; }
.toggle { width: 43px; height: 24px; padding: 2px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel-3); cursor: pointer; }
.toggle i { display: block; width: 18px; height: 18px; border-radius: 50%; background: var(--muted); transition: transform .16s; }
.toggle[aria-checked="true"] { background: var(--accent); }
.toggle[aria-checked="true"] i { background: var(--accent-ink); transform: translateX(17px); }
.toast { position: fixed; z-index: 100; left: 50%; bottom: 24px; max-width: calc(100% - 30px); padding: 11px 15px; border: 1px solid var(--line); border-radius: 10px; background: var(--text); color: var(--bg); box-shadow: var(--shadow); font-size: 11px; transform: translate(-50%, 30px); opacity: 0; pointer-events: none; transition: .2s; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.mobile-nav { display: none; }

@media (max-width: 1050px) {
  .topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pattern-summary { grid-template-columns: repeat(3, 1fr); }
  .audio-toolbar { grid-template-columns: repeat(4, 1fr); }
  .stats-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .topbar { height: 60px; padding: 0 12px; gap: 9px; }
  .brand { min-width: 0; flex: 1; }
  .brand-mark { width: 32px; height: 32px; }
  .brand strong { font-size: 14px; }
  .brand small { font-size: 7px; }
  .menu-button { display: grid; }
  .session-meter, .top-actions .compact { display: none; }
  .workspace { display: block; padding-top: 60px; }
  .sidebar { top: 60px; width: min(310px, 84vw); transform: translateX(-105%); transition: transform .2s; box-shadow: var(--shadow); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-scrim { position: fixed; z-index: 25; inset: 60px 0 0; width: 100%; border: 0; background: #020604a3; }
  .sidebar.open + .sidebar-scrim { display: block; }
  .main-content { padding: 26px 14px 92px; }
  .page-heading { align-items: flex-start; margin-bottom: 22px; }
  .page-heading h1 { font-size: 34px; }
  .summary-chip { display: none; }
  .library-tools { top: 68px; display: block; padding: 7px; }
  .search-box { width: 100%; }
  .filter-row { margin-top: 5px; }
  .topic-grid { grid-template-columns: 1fr; }
  .pattern-grid { grid-template-columns: 1fr; }
  .pattern-heading { display: block; }
  .pattern-heading .primary-button { width: 100%; margin-top: 18px; }
  .pattern-summary { grid-template-columns: repeat(2, 1fr); }
  .pattern-summary > div, .pattern-summary > span { min-height: 66px; }
  .pattern-study-card { min-height: 480px; padding: 38px 22px; }
  .pattern-stage-track { gap: 4px; }
  .pattern-stage-track span { gap: 3px; font-size: 8px; }
  .pattern-audio-actions { grid-template-columns: 1fr; }
  .pattern-quiz-head > div { min-width: 150px; }
  .pattern-rating { grid-template-columns: 1fr 1fr; }
  .pattern-rating p { grid-column: 1 / -1; }
  .topic-card { min-height: 170px; }
  .practice-config { display: grid; }
  .practice-config > label { min-width: 0; }
  .mode-tabs { height: 45px; overflow-x: auto; }
  .study-card { min-height: 330px; padding: 48px 22px 28px; }
  .study-label { left: 22px; }
  .english-text { font-size: 27px; }
  .korean-text { font-size: 16px; }
  .audio-toolbar { grid-template-columns: repeat(2, 1fr); }
  .pronunciation-coach { grid-template-columns: 1fr; }
  .word-tips { justify-content: flex-start; max-width: none; }
  .rating-panel { display: block; }
  .rating-panel > p { margin-bottom: 10px; }
  .rating-panel > div { display: grid; grid-template-columns: repeat(3, 1fr); }
  .rating-panel button { min-width: 0; display: block; padding: 8px; text-align: center; }
  .rating-panel button > span { display: grid; margin: 0 auto 5px; }
  .rating-panel strong, .rating-panel small { display: block; }
  .practice-navigation button { min-width: 0; flex: 1; }
  .topic-notes > div { grid-template-columns: 1fr; }
  .stats-cards { grid-template-columns: repeat(2, 1fr); }
  .data-tools { display: block; }
  .data-tools > div:last-child { display: grid; margin-top: 16px; }
  .mobile-nav { position: fixed; z-index: 35; display: grid; grid-template-columns: repeat(5, 1fr); left: 10px; right: 10px; bottom: max(8px, env(safe-area-inset-bottom)); height: 62px; padding: 5px; border: 1px solid var(--line); border-radius: 16px; background: color-mix(in srgb, var(--sidebar) 94%, transparent); box-shadow: var(--shadow); backdrop-filter: blur(18px); }
  .mobile-nav button { border: 0; border-radius: 11px; background: transparent; color: var(--muted); font-size: 9px; }
  .mobile-nav span { display: block; margin-bottom: 2px; font-size: 17px; }
  .mobile-nav button.active { background: var(--panel-3); color: var(--accent); }
  body.pattern-session .mobile-nav { display: none; }
  .toast { bottom: 84px; }
  body.pattern-session .toast { bottom: 24px; }
}

@media (max-width: 420px) {
  .top-actions { gap: 4px; }
  .icon-button { width: 38px; height: 38px; }
  .page-heading h1 { font-size: 31px; }
  .mode-tabs button { min-width: 60px; font-size: 10px; }
  .stats-cards { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-card { min-height: 112px; }
  .collection-item { grid-template-columns: 34px 1fr; }
  .collection-item > span:last-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}