:root {
  color-scheme: light;
  --bg: #f4f0e7;
  --surface: #fffcf7;
  --surface-2: #ebe7dc;
  --ink: #17352c;
  --muted: #6e786f;
  --line: rgba(24, 54, 45, 0.13);
  --green: #0b6b50;
  --green-2: #d8eadf;
  --amber: #e4b342;
  --coral: #df714d;
  --blue: #497a93;
  --shadow: 0 22px 70px rgba(48, 54, 38, 0.08);
  --radius: 24px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { max-width: 100%; background: var(--bg); scroll-behavior: smooth; overflow-x: hidden; }
body { width: 100%; max-width: 100%; margin: 0; min-width: 320px; color: var(--ink); background: var(--bg); font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
button, input, select { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible, select:focus-visible, [tabindex]:focus-visible { outline: 3px solid color-mix(in srgb, var(--amber) 75%, transparent); outline-offset: 3px; }

.app-shell { display: grid; grid-template-columns: 232px minmax(0, 1fr); min-height: 100vh; }
.sidebar { position: sticky; top: 0; height: 100vh; padding: 30px 18px 24px; display: flex; flex-direction: column; background: var(--green); color: #fff; z-index: 20; }
.brand { display: flex; align-items: center; gap: 13px; padding: 0 10px 26px; border: 0; background: none; color: #fff; text-align: left; cursor: pointer; }
.brand-mark, .app-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 14px; color: var(--green); background: var(--amber); font: 800 22px/1 Georgia, serif; box-shadow: inset 0 0 0 1px rgba(255,255,255,.26); }
.brand strong { display: block; font: 800 24px/1.15 Georgia, "Songti SC", serif; letter-spacing: .08em; }
.brand small { display: block; margin-top: 3px; opacity: .62; font-size: 9px; letter-spacing: .18em; }
.main-nav { display: grid; gap: 6px; }
.nav-item { width: 100%; display: flex; align-items: center; gap: 13px; padding: 13px 16px; border: 0; border-radius: 13px; color: rgba(255,255,255,.7); background: transparent; font-weight: 650; cursor: pointer; transition: .18s ease; }
.nav-item span { width: 23px; font-size: 19px; text-align: center; }
.nav-item:hover, .nav-item.is-active { color: #fff; background: rgba(255,255,255,.12); }
.sidebar-foot { margin-top: auto; }
.mini-streak { margin: 18px 10px 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.14); display: flex; align-items: center; justify-content: space-between; }
.mini-streak span { color: rgba(255,255,255,.55); font-size: 12px; }
.mini-streak strong { font-size: 13px; }

.main-content { width: 100%; max-width: 100vw; min-width: 0; padding: 0 4vw 68px; overflow-x: clip; }
.topbar { height: 112px; display: flex; align-items: center; justify-content: space-between; }
.topbar h1 { margin: 4px 0 0; font: 750 26px/1.2 Georgia, "Songti SC", serif; }
.eyebrow { margin: 0; color: var(--green); font-size: 10px; font-weight: 800; letter-spacing: .17em; text-transform: uppercase; }
.topbar > div:first-child { min-width: 0; }
.topbar-actions { min-width: 0; flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.icon-button, .avatar, .round-button { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: color-mix(in srgb, var(--surface) 86%, transparent); cursor: pointer; }
.avatar { color: #fff; border-color: var(--green); background: var(--green); font-size: 12px; font-weight: 800; }
.install-button, .outline-button { padding: 10px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); font-weight: 700; cursor: pointer; }
.view { display: none; animation: viewIn .28s ease; }
.view.is-active { display: block; }
@keyframes viewIn { from { opacity: 0; transform: translateY(5px); } }

.hero-card { min-height: 320px; display: flex; align-items: center; justify-content: space-between; padding: 45px clamp(32px, 6vw, 78px); border-radius: 30px; color: #fff; background: var(--green); position: relative; overflow: hidden; box-shadow: var(--shadow); }
.hero-card::before { content: ""; position: absolute; width: 420px; height: 420px; right: -110px; top: -210px; border-radius: 50%; border: 86px solid rgba(255,255,255,.045); }
.hero-card::after { content: "Aa"; position: absolute; right: 17%; bottom: -33px; font: 800 190px/1 Georgia, serif; color: rgba(255,255,255,.035); }
.hero-copy { position: relative; z-index: 1; }
.pill { display: inline-flex; padding: 7px 11px; border-radius: 99px; color: #ffe49e; background: rgba(255,255,255,.1); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.hero-copy h2, .progress-hero h2 { margin: 18px 0 12px; font: 700 clamp(31px, 4vw, 48px)/1.18 Georgia, "Songti SC", serif; letter-spacing: .02em; }
.hero-copy p { max-width: 470px; margin: 0 0 25px; color: rgba(255,255,255,.7); line-height: 1.8; overflow-wrap: anywhere; }
.primary-button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; padding: 13px 20px; border: 0; border-radius: 12px; color: #fff; background: var(--coral); font-weight: 800; cursor: pointer; box-shadow: 0 10px 25px rgba(83, 36, 20, .17); transition: transform .18s ease; }
.primary-button:hover { transform: translateY(-2px); }
.goal-ring { --progress: 0deg; flex: 0 0 auto; width: 174px; height: 174px; margin-right: 3%; display: grid; place-items: center; border-radius: 50%; background: conic-gradient(var(--amber) var(--progress), rgba(255,255,255,.13) 0); position: relative; z-index: 1; }
.goal-ring::before { content: ""; position: absolute; inset: 11px; border-radius: inherit; background: var(--green); }
.goal-ring div { position: relative; text-align: center; }
.goal-ring strong { display: block; font: 700 38px/1 Georgia, serif; }
.goal-ring span { display: block; margin-top: 8px; color: rgba(255,255,255,.55); font-size: 11px; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 20px 0; }
.stat-card { min-width: 0; display: flex; align-items: center; gap: 16px; padding: 21px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.stat-icon { width: 38px; height: 38px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 12px; font-weight: 900; }
.stat-icon.green { color: var(--green); background: var(--green-2); }.stat-icon.amber { color: #906a05; background: #f6e7ba; }.stat-icon.blue { color: var(--blue); background: #dce9ef; }.stat-icon.coral { color: var(--coral); background: #f5dfd6; }
.stat-card small { display: block; margin-bottom: 5px; color: var(--muted); font-size: 11px; }
.stat-card strong { font: 750 25px/1 Georgia, serif; }.stat-card em { margin-left: 4px; color: var(--muted); font-style: normal; font-size: 11px; }
.home-columns, .progress-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 20px; }
.panel { padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 20px; }
.panel h3, .panel-head h3 { margin: 5px 0 0; font: 750 19px/1.3 Georgia, "Songti SC", serif; }
.text-button { border: 0; color: var(--green); background: transparent; font-size: 12px; font-weight: 800; cursor: pointer; }
.preview-list { display: grid; gap: 8px; }
.preview-item { display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 12px 10px; border-radius: 12px; }
.preview-item:hover { background: var(--surface-2); }
.preview-index { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; color: var(--green); background: var(--green-2); font-size: 11px; font-weight: 800; }
.preview-item strong, .preview-item small { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.preview-item strong { font: 700 15px Georgia, serif; }.preview-item small { margin-top: 4px; color: var(--muted); font-size: 11px; }
.preview-item button { border: 0; background: transparent; color: var(--muted); cursor: pointer; }
.source-meters { display: grid; gap: 8px; }
.source-meters button { width: 100%; display: grid; grid-template-columns: 12px 1fr auto; align-items: center; gap: 13px; padding: 13px; border: 0; border-radius: 12px; background: transparent; text-align: left; cursor: pointer; }
.source-meters button:hover { background: var(--surface-2); }
.source-dot { width: 9px; height: 38px; border-radius: 99px; }.source-dot.emerald { background: var(--green); }.source-dot.saffron { background: var(--amber); }.source-dot.ink { background: var(--blue); }
.source-meters strong, .source-meters small { display: block; }.source-meters strong { font-size: 13px; }.source-meters small { margin-top: 4px; color: var(--muted); font-size: 11px; }

.learn-view { min-height: calc(100vh - 140px); }
.session-top { max-width: 880px; margin: 0 auto 22px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 18px; }
.session-progress span { display: block; margin-bottom: 7px; color: var(--muted); font-size: 11px; }.session-progress div { height: 5px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }.session-progress i { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--green); transition: width .3s ease; }
#sessionCounter { color: var(--muted); font-size: 12px; }
.study-stage { max-width: 760px; margin: auto; }
.word-card { min-height: 445px; padding: 30px 34px; border: 1px solid var(--line); border-radius: 30px; background: var(--surface); box-shadow: var(--shadow); cursor: pointer; position: relative; perspective: 1200px; overflow: hidden; }
.word-card::after { content: ""; position: absolute; width: 210px; height: 210px; right: -90px; bottom: -110px; border-radius: 50%; background: var(--green-2); opacity: .75; }
.card-meta { display: flex; align-items: center; justify-content: space-between; position: relative; z-index: 2; }.card-meta > span { padding: 6px 10px; border-radius: 99px; color: var(--green); background: var(--green-2); font-size: 10px; font-weight: 800; }
.speak-button { width: 37px; height: 37px; border: 1px solid var(--line); border-radius: 50%; color: var(--green); background: transparent; cursor: pointer; }
.card-front, .card-back { min-height: 340px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; transition: opacity .2s ease, transform .28s ease; }
.card-front p { color: var(--muted); font-size: 12px; }.card-front h2 { max-width: 100%; margin: 13px 0 5px; font: 750 clamp(38px, 7vw, 66px)/1.08 Georgia, serif; overflow-wrap: anywhere; }
.card-phonetic { margin-bottom: 16px; color: var(--muted); font: 500 17px/1.4 "Segoe UI", "Noto Sans", sans-serif; letter-spacing: .02em; }
.card-phonetic::before, .row-phonetic::before { content: "US"; display: inline-block; margin-right: 6px; padding: 1px 4px; border-radius: 5px; color: var(--green); background: var(--green-2); font: 800 8px/1.35 Inter, system-ui, sans-serif; letter-spacing: .04em; vertical-align: .12em; }
.family-words { max-width: 650px; display: flex; flex-wrap: wrap; justify-content: center; gap: 7px; color: var(--green); font: italic 16px/1.4 Georgia, serif; }.family-word { display: inline-flex; align-items: baseline; gap: 5px; padding: 5px 8px; border-radius: 9px; background: var(--green-2); }.family-word b { font-weight: 700; }.family-word small { color: var(--muted); font: normal 10px "Segoe UI", "Noto Sans", sans-serif; }
.flip-hint { position: absolute; left: 0; right: 0; bottom: 25px; color: var(--muted); font-size: 11px; }
.card-back { display: none; justify-content: flex-start; padding: 25px 5px 45px; text-align: left; overflow: auto; }.word-card.is-flipped .card-front { display: none; }.word-card.is-flipped .card-back { display: flex; animation: flipIn .25s ease; }
@keyframes flipIn { from { opacity: 0; transform: translateY(6px); } }
.answer-label { align-self: stretch; margin: 0 0 14px; color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.meaning-list { align-self: stretch; display: grid; gap: 8px; }
.meaning-row { display: grid; grid-template-columns: minmax(100px, .65fr) 1.5fr; gap: 16px; padding: 11px 14px; border-radius: 12px; background: var(--bg); line-height: 1.55; }
.meaning-row strong { font: 700 15px Georgia, serif; }.meaning-row span { color: var(--muted); font-size: 13px; }.meaning-term strong, .meaning-term small { display: block; }.meaning-term small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.front-actions, .answer-actions { min-height: 113px; padding-top: 18px; }.front-actions > p, .answer-actions > p { margin: 0 0 10px; color: var(--muted); text-align: center; font-size: 11px; }.front-actions > div, .answer-actions > div { display: grid; gap: 10px; }.front-actions > div { grid-template-columns: 1fr 1fr; }.answer-actions > div { grid-template-columns: repeat(3, 1fr); }
.front-actions button { min-height: 66px; display: grid; grid-template-columns: 32px 1fr; grid-template-rows: auto auto; align-items: center; column-gap: 9px; padding: 10px 16px; border: 1px solid var(--line); border-radius: 14px; color: var(--ink); background: var(--surface); cursor: pointer; text-align: left; }.front-actions button > span { grid-row: 1 / 3; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 10px; font-size: 17px; }.front-actions button strong { align-self: end; font-size: 13px; }.front-actions button small { align-self: start; color: var(--muted); font-size: 9px; }.front-actions .quick-next > span { color: var(--green); background: var(--green-2); }.front-actions .quick-learn { color: #fff; border-color: var(--green); background: var(--green); }.front-actions .quick-learn > span { color: var(--green); background: #fff; }.front-actions .quick-learn small { color: rgba(255,255,255,.72); }.word-card.is-flipped + .front-actions { display: none; }
.answer-actions { display: none; }.word-card.is-flipped ~ .answer-actions { display: block; animation: flipIn .2s ease; }
.grade-button { display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 9px; padding: 11px 13px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); text-align: left; cursor: pointer; }.grade-button:hover { transform: translateY(-1px); }.grade-button kbd { grid-row: 1/3; align-self: center; width: 25px; height: 25px; display: grid; place-items: center; border-radius: 7px; background: var(--surface-2); font: 700 10px inherit; }.grade-button strong { font-size: 12px; }.grade-button span { color: var(--muted); font-size: 9px; }.grade-button.again { border-bottom-color: var(--coral); }.grade-button.hard { border-bottom-color: var(--amber); }.grade-button.good { border-bottom-color: var(--green); }
.empty-state { min-height: 500px; display: grid; place-items: center; align-content: center; text-align: center; }.empty-state > span { width: 70px; height: 70px; display: grid; place-items: center; border-radius: 50%; color: var(--green); background: var(--green-2); font-size: 30px; }.empty-state h2 { margin: 20px 0 8px; font: 750 28px Georgia, serif; }.empty-state p { margin: 0 0 25px; color: var(--muted); }

.library-toolbar, .library-summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.library-actions { flex: 0 0 auto; display: flex; gap: 8px; }
.meaning-toggle[aria-pressed="true"] { color: #fff; border-color: var(--green); background: var(--green); }
.search-box { max-width: 620px; flex: 1; height: 46px; display: flex; align-items: center; gap: 10px; padding: 0 15px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }.search-box span { color: var(--muted); font-size: 22px; }.search-box input { width: 100%; border: 0; outline: 0; color: var(--ink); background: transparent; }
.filter-row { display: flex; gap: 8px; margin: 20px 0; overflow: auto; scrollbar-width: none; }.filter-row button { flex: 0 0 auto; padding: 9px 13px; border: 1px solid var(--line); border-radius: 99px; background: transparent; cursor: pointer; font-size: 12px; font-weight: 700; }.filter-row button span { margin-left: 4px; color: var(--muted); }.filter-row button.is-active { color: #fff; border-color: var(--green); background: var(--green); }.filter-row button.is-active span { color: rgba(255,255,255,.7); }
.library-summary { margin-bottom: 10px; }.library-summary p { color: var(--muted); font-size: 12px; }.library-summary select { padding: 8px 30px 8px 10px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); background: var(--surface); }
.word-list { border: 1px solid var(--line); border-radius: 18px; background: var(--surface); overflow: hidden; }
.word-row { display: grid; grid-template-columns: 58px minmax(150px, .7fr) minmax(260px, 2fr) 92px minmax(250px, auto); align-items: center; gap: 15px; min-height: 76px; padding: 11px 18px; border-bottom: 1px solid var(--line); cursor: pointer; }.word-row:last-child { border-bottom: 0; }.word-row:hover, .word-row.is-expanded { background: color-mix(in srgb, var(--green-2) 25%, var(--surface)); }
.word-number { color: var(--muted); font-size: 10px; }.word-main { min-width: 0; }.word-main strong { display: block; font: 750 17px Georgia, serif; }.row-phonetic { display: block; margin-top: 2px; color: var(--green); font-size: 11px; line-height: 1.35; overflow-wrap: anywhere; }.row-phonetic::before { margin-right: 4px; color: var(--surface); background: var(--green); font-size: 7px; }.word-main small { display: block; margin-top: 4px; color: var(--muted); font-size: 10px; }.word-meaning { min-width: 0; color: var(--muted); font-size: 12px; line-height: 1.5; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }.word-meaning.is-chinese { color: var(--ink); }
.status-chip { justify-self: start; padding: 5px 9px; border-radius: 99px; font-size: 10px; font-weight: 800; }.status-chip.new { color: var(--blue); background: #dce9ef; }.status-chip.learning { color: #846105; background: #f5e8bf; }.status-chip.weak { color: #a84427; background: #f4ddd4; }.status-chip.mastered { color: var(--green); background: var(--green-2); }
.row-actions { display: flex; align-items: center; justify-content: flex-end; gap: 6px; }
.mark-button, .row-study { min-height: 34px; padding: 0 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); cursor: pointer; font-size: 10px; font-weight: 800; white-space: nowrap; }
.mark-button.known { color: var(--green); }.mark-button.unknown { color: var(--coral); }.mark-button.known.is-selected { color: #fff; border-color: var(--green); background: var(--green); }.mark-button.unknown.is-selected { color: #fff; border-color: var(--coral); background: var(--coral); }
.row-study { color: var(--green); background: var(--green-2); }
.inline-meaning { grid-column: 2 / -1; width: 100%; padding: 16px 18px 18px; border-top: 1px dashed var(--line); cursor: default; }
.inline-meaning-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }.inline-meaning-head strong { font-size: 11px; }.inline-meaning-head span { color: var(--muted); font-size: 10px; }
.inline-meaning-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }.inline-meaning-grid > div { min-width: 0; padding: 10px 12px; border-radius: 10px; background: var(--surface); }.inline-meaning-grid strong, .inline-meaning-grid small, .inline-meaning-grid span { display: block; }.inline-meaning-grid strong { font: 700 13px Georgia, serif; }.inline-meaning-grid small { margin: 3px 0 5px; color: var(--green); font-size: 10px; overflow-wrap: anywhere; }.inline-meaning-grid span { color: var(--muted); font-size: 11px; line-height: 1.5; }
.load-more { width: 100%; margin-top: 14px; padding: 12px; border: 1px solid var(--line); border-radius: 13px; background: transparent; cursor: pointer; }

.progress-hero { min-height: 235px; display: flex; align-items: center; justify-content: space-between; padding: 30px 60px; border-radius: 28px; color: #fff; background: var(--green); }.progress-hero h2 { margin: 12px 0; font-size: 34px; }.progress-hero p { margin: 0; color: rgba(255,255,255,.64); }.progress-hero .eyebrow { color: #f3cd6b; }.mastery-number { text-align: center; padding: 25px 35px; border-left: 1px solid rgba(255,255,255,.16); }.mastery-number strong { display: block; font: 750 54px Georgia, serif; }.mastery-number span { color: rgba(255,255,255,.6); font-size: 11px; }
.progress-grid { margin: 20px 0; }.panel-head > span { color: var(--muted); font-size: 11px; }
.week-chart { height: 180px; display: grid; grid-template-columns: repeat(7, 1fr); align-items: end; gap: 12px; }.bar-day { height: 100%; display: grid; grid-template-rows: 1fr auto; gap: 8px; align-items: end; text-align: center; }.bar-day i { width: min(32px, 70%); min-height: 4px; margin: auto; border-radius: 8px 8px 3px 3px; background: var(--green-2); position: relative; }.bar-day i.today { background: var(--green); }.bar-day i span { position: absolute; top: -19px; left: 50%; transform: translateX(-50%); color: var(--muted); font: normal 9px inherit; }.bar-day small { color: var(--muted); font-size: 9px; }
.distribution { display: grid; gap: 15px; }.dist-row { display: grid; grid-template-columns: 70px 1fr 35px; align-items: center; gap: 10px; font-size: 11px; }.dist-row div { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }.dist-row i { display: block; height: 100%; border-radius: inherit; }.dist-row b { text-align: right; font-size: 11px; }
.achievements > div:last-child { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }.achievement { padding: 18px; border: 1px solid var(--line); border-radius: 15px; opacity: .45; }.achievement.is-earned { opacity: 1; background: color-mix(in srgb, var(--green-2) 35%, var(--surface)); }.achievement span { font-size: 24px; }.achievement strong, .achievement small { display: block; }.achievement strong { margin: 10px 0 4px; font-size: 12px; }.achievement small { color: var(--muted); font-size: 10px; line-height: 1.45; }

.settings-grid { max-width: 900px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }.settings-card h3 { margin: 0 0 18px; }.settings-card > label:not(.switch-row) { display: grid; gap: 14px; font-size: 13px; }.settings-card input[type="range"] { width: 100%; accent-color: var(--green); }.switch-row { min-height: 55px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); }.switch-row strong, .switch-row small { display: block; }.switch-row strong { font-size: 12px; }.switch-row small { margin-top: 4px; color: var(--muted); font-size: 10px; }.switch-row input { width: 40px; height: 22px; accent-color: var(--green); }.install-card { grid-column: 1 / -1; display: flex; align-items: center; gap: 20px; }.install-card h3 { margin-bottom: 5px; }.install-card p, .danger-card p { color: var(--muted); font-size: 12px; }.install-card .primary-button { margin-top: 8px; }.danger { color: var(--coral); border-color: color-mix(in srgb, var(--coral) 35%, transparent); }

dialog { color: var(--ink); }.sources-dialog { width: min(1080px, calc(100vw - 30px)); height: min(86vh, 900px); padding: 28px; border: 0; border-radius: 28px; background: var(--bg); box-shadow: 0 40px 120px rgba(0,0,0,.25); }.sources-dialog::backdrop, .image-dialog::backdrop { background: rgba(8, 27, 22, .7); backdrop-filter: blur(4px); }.dialog-head { display: flex; align-items: flex-start; justify-content: space-between; }.dialog-head h2 { margin: 7px 0 4px; font: 750 28px Georgia, serif; }.dialog-head p { margin: 0; color: var(--muted); font-size: 12px; }.source-tabs { display: flex; gap: 8px; margin: 22px 0 15px; }.source-tabs button { padding: 8px 13px; border: 1px solid var(--line); border-radius: 99px; background: transparent; cursor: pointer; }.source-tabs button.is-active { color: #fff; background: var(--green); }.source-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }.source-thumb { padding: 0; border: 0; border-radius: 15px; background: var(--surface); overflow: hidden; cursor: zoom-in; text-align: left; }.source-thumb img { width: 100%; height: 220px; display: block; object-fit: cover; }.source-thumb span { display: block; padding: 10px; font-size: 10px; color: var(--muted); }
.image-dialog { width: min(96vw, 1400px); height: 94vh; padding: 55px 10px 10px; border: 0; background: transparent; overflow: auto; }.image-dialog .round-button { position: fixed; top: 24px; right: 30px; color: #fff; background: rgba(0,0,0,.35); }.image-dialog img { max-width: 100%; display: block; margin: auto; border-radius: 8px; }
.toast { position: fixed; left: 50%; bottom: 32px; z-index: 100; padding: 11px 16px; border-radius: 12px; color: #fff; background: #17352c; box-shadow: var(--shadow); font-size: 12px; opacity: 0; transform: translate(-50%, 15px); pointer-events: none; transition: .25s; }.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
.update-banner[hidden] { display: none; }.update-banner { position: fixed; right: 24px; bottom: 24px; z-index: 110; width: min(460px, calc(100vw - 32px)); display: grid; grid-template-columns: 42px minmax(0,1fr) auto; align-items: center; gap: 12px; padding: 14px; border: 1px solid color-mix(in srgb, var(--green) 25%, var(--line)); border-radius: 18px; background: var(--surface); box-shadow: 0 18px 60px rgba(5,34,26,.22); animation: update-in .28s ease-out; }.update-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; color: #fff; background: var(--green); font-size: 24px; }.update-copy { min-width: 0; }.update-copy strong, .update-copy small { display: block; }.update-copy strong { margin-bottom: 4px; font-size: 13px; }.update-copy small { color: var(--muted); font-size: 10px; line-height: 1.45; }.update-actions { display: flex; gap: 7px; }.update-actions button { padding: 9px 12px; font-size: 11px; white-space: nowrap; }.update-actions button:disabled { opacity: .65; cursor: wait; }@keyframes update-in { from { opacity: 0; transform: translateY(14px); } }
.bottom-nav { display: none; }

body.dark { color-scheme: dark; --bg: #14231f; --surface: #1b2c27; --surface-2: #243630; --ink: #edf3ed; --muted: #a3ada6; --line: rgba(235,245,239,.11); --green: #188965; --green-2: #203f35; --shadow: 0 22px 70px rgba(0,0,0,.2); }
body.dark .goal-ring::before { background: #0f7053; }

@media (max-width: 1050px) {
  .app-shell { grid-template-columns: 190px minmax(0, 1fr); }.stat-grid { grid-template-columns: 1fr 1fr; }.home-columns { grid-template-columns: 1fr; }.goal-ring { width: 145px; height: 145px; }.word-row { grid-template-columns: 42px minmax(120px,.7fr) minmax(160px,1.2fr) 76px minmax(215px,auto); gap: 10px; padding-inline: 12px; }
}
@media (max-width: 760px) {
  .app-shell { width: 100%; max-width: 100%; display: block; }.sidebar { display: none; }.main-content { width: 100%; max-width: 100%; padding: 0 16px 92px; }.topbar { width: 100%; height: 88px; }.topbar h1 { font-size: 22px; }.install-button { display: none !important; }.hero-card { width: 100%; max-width: 100%; min-height: 395px; padding: 30px 24px; align-items: flex-start; }.hero-card::after { right: -10px; }.hero-copy { min-width: 0; max-width: 100%; }.hero-copy h2 { font-size: 34px; }.hero-copy p { max-width: 100%; }.goal-ring { width: 92px; height: 92px; position: absolute; right: 18px; bottom: 22px; }.goal-ring strong { font-size: 24px; }.goal-ring span { font-size: 8px; }.stat-grid { width: 100%; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; }.stat-card { min-width: 0; gap: 10px; padding: 15px 12px; overflow: hidden; }.stat-card > div { min-width: 0; }.stat-icon { width: 32px; height: 32px; }.stat-card strong { font-size: 21px; }.home-columns, .progress-grid, .settings-grid { width: 100%; grid-template-columns: minmax(0, 1fr); }.panel { min-width: 0; padding: 20px 16px; }.bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; min-height: 68px; padding: 8px max(8px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left)); display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border-top: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 94%, transparent); backdrop-filter: blur(15px); }.bottom-nav button { min-width: 0; display: grid; place-items: center; gap: 2px; border: 0; color: var(--muted); background: transparent; font-size: 9px; }.bottom-nav button span { font-size: 20px; }.bottom-nav button.is-active { color: var(--green); }.word-card { min-height: 430px; padding: 23px 18px; border-radius: 23px; }.card-front h2 { font-size: 42px; }.meaning-row { grid-template-columns: 1fr; gap: 3px; }.answer-actions > div { gap: 6px; }.grade-button { grid-template-columns: 1fr; text-align: center; padding: 10px 4px; }.grade-button kbd { display: none; }.grade-button span { display: none; }.session-top { gap: 10px; }.library-toolbar .source-button { display: none; }.filter-row { margin: 14px -16px; padding: 0 16px; }.word-list { border: 0; background: transparent; overflow: visible; }.word-row { grid-template-columns: 36px minmax(0,1fr); gap: 10px; margin-bottom: 8px; padding: 13px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }.word-main { grid-column: 2; }.word-meaning { grid-column: 1/-1; grid-row: 2; white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }.status-chip { grid-column: 2; grid-row: 3; }.row-actions { grid-column: 1/-1; grid-row: 4; justify-content: stretch; }.row-actions button { flex: 1; }.inline-meaning { grid-column: 1/-1; grid-row: 5; padding-inline: 4px; }.inline-meaning-grid { grid-template-columns: 1fr; }.progress-hero { min-height: 360px; padding: 30px 25px; align-items: flex-start; flex-direction: column; }.mastery-number { align-self: stretch; padding: 20px; border: 0; border-top: 1px solid rgba(255,255,255,.15); }.achievements > div:last-child { grid-template-columns: 1fr 1fr; }.install-card { grid-column: auto; align-items: flex-start; }.source-gallery { grid-template-columns: 1fr 1fr; }.source-thumb img { height: 180px; }.sources-dialog { padding: 22px 14px; }.dialog-head p { display: none; }
  .update-banner { left: 12px; right: 12px; bottom: calc(78px + env(safe-area-inset-bottom)); width: auto; grid-template-columns: 38px minmax(0,1fr); gap: 10px; padding: 12px; border-radius: 16px; }.update-icon { width: 38px; height: 38px; }.update-actions { grid-column: 1/-1; }.update-actions button { flex: 1; min-height: 38px; }
  .front-actions > div { gap: 7px; }.front-actions button { grid-template-columns: 28px 1fr; column-gap: 7px; padding: 9px 10px; }.front-actions button > span { width: 28px; height: 28px; }.front-actions button strong { font-size: 11px; }
}
@media (max-width: 420px) { .stat-card em { display: none; }.stat-card small { font-size: 10px; }.hero-copy p { max-width: 240px; }.source-gallery { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } }