/* Daily vocab by SirV — giao diện ưu tiên điện thoại.
   Màu định nghĩa bằng token ở :root; chủ đề sáng/tối theo hệ thống, có thể ép
   bằng data-theme trên <html>. Vùng chạm tối thiểu 44px (Apple HIG). */
:root{
  --bg:#0e1420; --surface:#161e2e; --surface-2:#1d2739; --line:#2a3548;
  --ink:#f3f5f9; --ink-2:#aab6c8; --ink-3:#7c8aa0;
  --accent:#c6f432; --on-accent:#141a05; --accent-soft:rgba(198,244,50,.14);
  --good:#34d399; --good-soft:rgba(52,211,153,.15);
  --bad:#fb7185; --bad-soft:rgba(251,113,133,.15);
  --warn:#fbbf24; --info:#7dd3fc;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:20px; --tabbar:64px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-zh:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f5f6fa; --surface:#ffffff; --surface-2:#eef1f6; --line:#dfe4ec;
  --ink:#131a26; --ink-2:#4b5668; --ink-3:#7a8597;
  --accent:#1f2a14; --on-accent:#d9ff5c; --accent-soft:rgba(101,163,13,.14);
  --good:#059669; --good-soft:rgba(5,150,105,.12);
  --bad:#e11d48; --bad-soft:rgba(225,29,72,.1);
  --warn:#b45309; --info:#0369a1;
  --shadow:0 8px 24px rgba(20,30,50,.08);
  color-scheme:light;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#f5f6fa; --surface:#ffffff; --surface-2:#eef1f6; --line:#dfe4ec;
    --ink:#131a26; --ink-2:#4b5668; --ink-3:#7a8597;
    --accent:#1f2a14; --on-accent:#d9ff5c; --accent-soft:rgba(101,163,13,.14);
    --good:#059669; --good-soft:rgba(5,150,105,.12);
    --bad:#e11d48; --bad-soft:rgba(225,29,72,.1);
    --warn:#b45309; --info:#0369a1;
    --shadow:0 8px 24px rgba(20,30,50,.08);
    color-scheme:light;
  }
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink)}
body{font:16px/1.5 var(--font);-webkit-font-smoothing:antialiased;overscroll-behavior-y:none}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0;touch-action:manipulation}
button:disabled{opacity:.4;cursor:default}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:10px}
h2,h3,p{margin:0}
[hidden]{display:none!important}
svg{fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

.app{max-width:560px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column;
  padding:env(safe-area-inset-top) 0 0}

/* ---------- Thanh đầu ---------- */
.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:10px;
  padding:10px 16px;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px)}
.brand{display:flex;align-items:center;gap:9px;min-width:0;flex:1}
.brand-logo{border-radius:9px;flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
.brand-text b{font-size:16px;letter-spacing:-.2px;white-space:nowrap}
.brand-text span{font-size:11px;color:var(--ink-3);letter-spacing:.3px}
.streak{display:flex;align-items:center;gap:3px;height:36px;padding:0 11px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);font-size:14px}
.streak b{font-variant-numeric:tabular-nums}

/* ---------- Segmented control ---------- */
.seg{display:inline-flex;background:var(--surface-2);border-radius:12px;padding:3px;gap:2px}
.seg button{min-height:34px;padding:0 12px;border-radius:9px;font-size:14px;font-weight:600;color:var(--ink-2);white-space:nowrap}
.seg button[aria-checked="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.18)}
:root[data-theme="dark"] .seg button[aria-checked="true"],
.seg button[aria-checked="true"]{outline:1px solid var(--line)}
.seg.sm button{min-height:32px;padding:0 10px;font-size:13px}
.lang-seg button{padding:0 10px}

.screens{flex:1;padding:4px 16px calc(var(--tabbar) + env(safe-area-inset-bottom) + 20px)}
.screen{animation:fade .22s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ---------- Màn Học ---------- */
.mode-seg{display:flex;width:100%;margin:4px 0 10px}
.mode-seg button{flex:1;min-height:40px;font-size:15px}
.badge{display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 6px;margin-left:4px;
  border-radius:999px;background:var(--bad);color:#fff;font-size:12px;font-weight:700;vertical-align:1px}

.chips{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.chips.scroll{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:0 -16px 10px;padding:0 16px}
.chips.scroll::-webkit-scrollbar{display:none}
.chip{display:inline-flex;align-items:center;gap:5px;min-height:34px;flex:none;padding:0 12px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);font-size:14px;font-weight:600;white-space:nowrap}
.chip-k{color:var(--ink-3);font-weight:500}
.chip[aria-checked="true"]{background:var(--accent);color:var(--on-accent);border-color:transparent}
.caret{width:0;height:0;border:4px solid transparent;border-top:5px solid var(--ink-3);margin-top:4px}

.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;min-height:250px;display:flex;flex-direction:column}
.card-progress{height:4px;background:var(--surface-2)}
.card-progress div{height:100%;width:0;background:var(--accent);transition:width .35s ease;border-radius:0 4px 4px 0}
:root[data-theme="light"] .card-progress div{background:#65a30d}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) .card-progress div{background:#65a30d}}
.card-head{display:flex;align-items:center;gap:8px;padding:12px 14px 0}
.pill{font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--accent-soft);color:var(--ink)}
.card-pos{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums;flex:1}
.ring{position:relative;width:40px;height:40px;display:grid;place-items:center;border-radius:50%}
.ring svg{position:absolute;inset:0;transform:rotate(-90deg)}
.ring circle{stroke-width:3}
.ring-bg{stroke:var(--surface-2)}
.ring-fg{stroke:var(--accent);stroke-dasharray:97.4;stroke-dashoffset:0;transition:stroke-dashoffset .2s linear,stroke .2s}
:root[data-theme="light"] .ring-fg{stroke:#65a30d}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) .ring-fg{stroke:#65a30d}}
.ring.low .ring-fg{stroke:var(--bad)}
.ring span{font-size:12px;font-weight:700;font-variant-numeric:tabular-nums}
.ring.paused span{font-size:13px}
.ring.off{visibility:hidden}

.card-body{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center;padding:10px 18px 18px}
.prompt-label{font-size:12px;letter-spacing:.8px;text-transform:uppercase;color:var(--ink-3);font-weight:600}
.prompt{font-size:clamp(22px,6.2vw,30px);line-height:1.3;font-weight:750;letter-spacing:-.3px;margin-top:6px;
  overflow-wrap:anywhere;max-width:100%}
.prompt.long{font-size:clamp(18px,4.8vw,22px);font-weight:650}
.prompt-pos{font-size:13px;color:var(--ink-3);margin-top:4px;min-height:19px}

.tiles{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin-top:14px;max-width:100%}
.tiles{column-gap:14px}
.tile-word{display:inline-flex;gap:calc(var(--tw,30px) * .2);flex-wrap:nowrap}
.tile{width:var(--tw,30px);height:calc(var(--tw,30px) * 1.27);border-radius:calc(var(--tw,30px) * .3);background:var(--surface-2);border:1px solid var(--line);
  display:grid;place-items:center;font-size:calc(var(--tw,30px) * .63);font-weight:700;text-transform:uppercase;color:var(--ink)}
.tile.on{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 45%,transparent)}
.tile.sym{background:none;border:0;width:auto;padding:0 1px}
.tile.gap{background:none;border:0;width:10px}
.tiles.zh .tile{width:52px;height:60px;border-radius:10px;font:600 30px/1 var(--font-zh);text-transform:none;display:flex;flex-direction:column;justify-content:center;gap:2px}
.tiles.zh .tile small{font:600 11px/1 var(--font);color:var(--ink-2)}
.tiles-note{font-size:13px;color:var(--ink-3);margin-top:8px;min-height:20px}

.answer{width:100%;margin-top:6px;scroll-margin-bottom:170px;scroll-margin-top:70px;animation:pop .28s cubic-bezier(.2,.9,.3,1.3)}
@keyframes pop{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
.answer-main{display:flex;align-items:center;justify-content:center;gap:10px}
.answer-word{font-size:clamp(28px,8vw,38px);font-weight:800;letter-spacing:-.5px;color:var(--ink);overflow-wrap:anywhere}
.answer-word.zh{font:700 clamp(40px,12vw,56px)/1.15 var(--font-zh)}
.icon-btn{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--accent-soft);flex:none}
.icon-btn svg{width:22px;height:22px}
.icon-btn.playing{animation:pulse 1s ease infinite}
@keyframes pulse{50%{transform:scale(1.08)}}
.answer-sub{font-size:15px;color:var(--ink-2);margin-top:4px}
.answer-gloss{font-size:14px;color:var(--ink-3);margin-top:6px}
.example{margin-top:14px;padding:12px 14px;border-radius:14px;background:var(--surface-2);text-align:left}
.ex-en{font-size:15px}
.ex-en mark{background:none;color:inherit;font-weight:750;text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:2px;text-underline-offset:3px}
.ex-vi{font-size:14px;color:var(--ink-2);margin-top:6px}
.ex-actions{display:flex;gap:16px;flex-wrap:wrap}
.row-val{color:var(--ink-3);font-weight:500;margin-left:auto}
.voice-group{font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-3);padding:12px 12px 4px;font-weight:600}
.voice-row{display:flex;align-items:center;gap:6px}
.voice-row .opt{flex:1}
.voice-row .icon-btn{width:40px;height:40px}
.voice-tip{font-size:13px;color:var(--ink-2);padding:10px 12px 4px}
.badge-ai{display:inline-block;font-size:11px;font-weight:700;padding:1px 6px;border-radius:6px;background:var(--good-soft);color:var(--good);margin-left:6px;vertical-align:1px}
.link-btn{margin-top:6px;font-size:13px;font-weight:600;color:var(--info);min-height:32px}

.card-flash{position:absolute;inset:0;pointer-events:none;opacity:0;border-radius:inherit}
.card.correct .card-flash{animation:flash .7s ease;box-shadow:inset 0 0 0 3px var(--good);background:var(--good-soft)}
.card.wrong{animation:shake .38s ease}
@keyframes flash{0%{opacity:0}25%{opacity:1}100%{opacity:0}}
@keyframes shake{20%,60%{transform:translateX(-6px)}40%,80%{transform:translateX(6px)}}

.answer-form{display:flex;gap:8px;margin-top:12px}
.answer-form input{flex:1;min-width:0;height:52px;border-radius:14px;border:1.5px solid var(--line);background:var(--surface);
  padding:0 16px;font-size:17px}
.answer-form input:focus{outline:none;border-color:var(--accent)}
.answer-form input::placeholder{color:var(--ink-3)}
.mic{width:52px;height:52px;border-radius:14px;background:var(--surface);border:1.5px solid var(--line);display:grid;place-items:center;flex:none;position:relative}
.mic svg{width:22px;height:22px}
.mic.on{background:var(--bad);border-color:transparent;color:#fff}
.mic.on::before{content:"";position:absolute;inset:-5px;border-radius:18px;border:2px solid var(--bad);animation:micwave 1.2s ease-out infinite}
@keyframes micwave{from{opacity:.9;transform:scale(.92)}to{opacity:0;transform:scale(1.15)}}
.answer-form input.listening{border-color:var(--bad)}
.submit{width:52px;height:52px;border-radius:14px;background:var(--accent);color:var(--on-accent);display:grid;place-items:center;flex:none}
.submit svg{width:22px;height:22px;stroke-width:2.5}
.feedback{min-height:22px;font-size:14px;font-weight:600;margin:4px 2px 6px;color:var(--ink-2);text-align:center}
.feedback.good{color:var(--good)} .feedback.bad{color:var(--bad)} .feedback.warn{color:var(--warn)}

.actions{display:grid;grid-template-columns:.9fr .9fr 1.4fr;gap:8px}
.dock{position:sticky;z-index:4;bottom:calc(var(--tabbar) + env(safe-area-inset-bottom));margin:0 -16px;padding:2px 16px 10px;
  background:linear-gradient(to top,var(--bg) 78%,color-mix(in srgb,var(--bg) 0%,transparent))}
.sheet .actions{position:static;background:none;padding:0}
.actions.rate{grid-template-columns:1fr 1fr}
.btn{white-space:nowrap;min-height:52px;border-radius:14px;padding:0 14px;font-weight:700;font-size:15px;display:inline-flex;align-items:center;justify-content:center;gap:6px;
  background:var(--surface);border:1px solid var(--line);transition:transform .08s}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--accent);color:var(--on-accent);border-color:transparent}
.btn.ghost{background:var(--surface)}
.btn.wide{width:100%}
.btn.sm{min-height:40px;font-size:14px}
.rate .btn{flex-direction:column;gap:0;min-height:60px}
.rate .btn small{font-size:12px;font-weight:500;opacity:.8}
.btn.auto{position:relative;overflow:hidden}
.btn.auto::after{content:"";position:absolute;left:0;bottom:0;height:4px;width:0;background:currentColor;opacity:.55;animation:autofill var(--auto-dur,3s) linear forwards}
@keyframes autofill{to{width:100%}}
.feedback .link-btn{margin:0 0 0 6px;min-height:0;padding:2px 4px;font-size:13px;text-decoration:underline}
.btn.again{background:var(--bad-soft);color:var(--bad);border-color:transparent}
.btn.good{background:var(--good-soft);color:var(--good);border-color:transparent}

.summary,.empty{text-align:center;padding:26px 18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  display:flex;flex-direction:column;gap:10px;align-items:center}
.summary-emoji{font-size:48px;line-height:1}
.summary h2,.empty h2{font-size:21px}
.summary p,.empty p{color:var(--ink-2);font-size:15px}
.sum-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:100%;margin:6px 0 4px}
.sum-stats div{background:var(--surface-2);border-radius:14px;padding:10px 4px}
.sum-stats b{display:block;font-size:24px;font-variant-numeric:tabular-nums}
.sum-stats span{font-size:12px;color:var(--ink-3)}

.loading{display:flex;align-items:center;justify-content:center;gap:10px;color:var(--ink-2);padding:40px 0;font-size:15px}
.spinner{width:20px;height:20px;border-radius:50%;border:2.5px solid var(--line);border-top-color:var(--accent);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Kho từ ---------- */
.search{position:relative;margin:6px 0 10px}
.search svg{position:absolute;left:14px;top:50%;width:18px;height:18px;transform:translateY(-50%);color:var(--ink-3)}
.search input{width:100%;height:48px;border-radius:14px;border:1px solid var(--line);background:var(--surface);padding:0 14px 0 42px;font-size:16px}
.search input:focus{outline:none;border-color:var(--accent)}
.lib-count{font-size:13px;color:var(--ink-3);margin:0 2px 8px}
.word-list{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.word-list:empty{display:none}
.word-row{display:flex;align-items:center;gap:10px;padding:11px 12px 11px 16px;border-bottom:1px solid var(--line);cursor:pointer}
.word-row:last-child{border-bottom:0}
.word-row:active{background:var(--surface-2)}
.wr-main{flex:1;min-width:0}
.wr-top{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.wr-word{font-weight:750;font-size:16px}
.wr-word.zh{font:700 20px/1.2 var(--font-zh)}
.wr-meta{font-size:12px;color:var(--ink-3)}
.wr-mean{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.wr-state{width:8px;height:8px;border-radius:50%;flex:none}
.wr-state.learning{background:var(--warn)} .wr-state.known{background:var(--good)}
.word-row .icon-btn{width:40px;height:40px;background:none}
.sentinel{height:40px}

/* ---------- Tiến độ ---------- */
.goal-card{display:flex;align-items:center;gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-top:6px}
.goal-ring{position:relative;width:112px;height:112px;flex:none}
.goal-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.goal-ring circle{stroke-width:10}
.gr-bg{stroke:var(--surface-2)}
.gr-fg{stroke:var(--good);stroke-dasharray:326.7;stroke-dashoffset:326.7;transition:stroke-dashoffset .6s ease}
.goal-num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.goal-num b{font-size:28px;line-height:1;font-variant-numeric:tabular-nums}
.goal-num span{font-size:12px;color:var(--ink-3)}
.goal-text{display:flex;flex-direction:column;gap:6px;align-items:flex-start}
.goal-text h2{font-size:18px}
.goal-text p{font-size:14px;color:var(--ink-2)}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0 4px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:12px}
.stat b{display:block;font-size:24px;font-variant-numeric:tabular-nums}
.stat span{font-size:12px;color:var(--ink-3)}
.sec-title{font-size:15px;margin:20px 2px 10px}
.week{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;align-items:end;height:130px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px 14px 10px}
.day{display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.day i{width:100%;max-width:28px;border-radius:7px 7px 3px 3px;background:var(--surface-2);min-height:4px;transition:height .5s ease}
.day.hit i{background:var(--good)}
.day.today span{color:var(--ink);font-weight:700}
.day b{font-size:11px;color:var(--ink-2);font-variant-numeric:tabular-nums;min-height:15px}
.day span{font-size:11px;color:var(--ink-3)}
.levels{display:flex;flex-direction:column;gap:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.lv-top{display:flex;justify-content:space-between;font-size:14px;margin-bottom:6px}
.lv-top span{color:var(--ink-3);font-variant-numeric:tabular-nums}
.lv-bar{height:8px;border-radius:8px;background:var(--surface-2);overflow:hidden;display:flex}
.lv-bar .k{background:var(--good)} .lv-bar .l{background:var(--warn)}
.note{font-size:13px;color:var(--ink-3);margin:10px 2px}

/* ---------- Cài đặt ---------- */
.group{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:6px 0;margin:10px 0 14px}
.group-title{font-size:13px;text-transform:uppercase;letter-spacing:.7px;color:var(--ink-3);padding:10px 16px 4px;font-weight:600}
.group-note{font-size:13px;color:var(--ink-2);padding:0 16px 8px}
.row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:52px;padding:6px 16px;border-top:1px solid var(--line);width:100%;text-align:left;font-size:15px;flex-wrap:wrap}
.group-title+.row,.group-note+.row{border-top:0}
.row.link{cursor:pointer;font-weight:600}
.row.danger{color:var(--bad)}
.switch input{position:absolute;opacity:0;pointer-events:none}
.switch i{width:50px;height:30px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);position:relative;transition:background .2s;flex:none}
.switch i::after{content:"";position:absolute;top:2px;left:2px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:transform .2s}
.switch input:checked+i{background:var(--good);border-color:transparent}
.switch input:checked+i::after{transform:translateX(20px)}
.switch input:focus-visible+i{outline:2px solid var(--accent);outline-offset:2px}
.credits summary{cursor:pointer;list-style:none;min-height:44px;display:flex;align-items:center}
.credits summary::after{content:"›";margin-left:auto;font-size:18px;transition:transform .2s}
.credits[open] summary::after{transform:rotate(90deg)}
.credits p{font-size:13px;color:var(--ink-2);padding:0 16px 10px}
.credits a{color:var(--info)}
.version{text-align:center;font-size:12px;color:var(--ink-3);margin:8px 0}

/* ---------- Tab bar ---------- */
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:10;display:flex;justify-content:center;
  background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:saturate(1.6) blur(16px);-webkit-backdrop-filter:saturate(1.6) blur(16px);
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.tabbar button{flex:1;max-width:140px;height:var(--tabbar);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--ink-3);font-size:11px;font-weight:600}
.tabbar svg{width:24px;height:24px}
.tabbar button[aria-current="page"]{color:var(--ink)}
.tabbar button[aria-current="page"] svg{stroke:var(--ink);stroke-width:2.4}

/* ---------- Bottom sheet ---------- */
.sheet-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:20;animation:fadein .2s}
@keyframes fadein{from{opacity:0}}
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:21;max-width:560px;margin:0 auto;max-height:82dvh;display:flex;flex-direction:column;
  background:var(--surface);border-radius:22px 22px 0 0;padding:8px 0 calc(12px + env(safe-area-inset-bottom));box-shadow:0 -10px 40px rgba(0,0,0,.35);
  animation:up .26s cubic-bezier(.2,.9,.3,1)}
@keyframes up{from{transform:translateY(100%)}}
.sheet-grab{width:40px;height:5px;border-radius:5px;background:var(--line);margin:0 auto 10px}
.sheet h3{font-size:17px;padding:0 20px 10px}
.sheet-body{overflow-y:auto;padding:0 12px;-webkit-overflow-scrolling:touch}
.opt{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;min-height:50px;padding:0 12px;border-radius:12px;text-align:left;font-size:16px}
.opt:active{background:var(--surface-2)}
.opt small{color:var(--ink-3);font-size:13px}
.opt[aria-checked="true"]{font-weight:700}
.opt[aria-checked="true"]::after{content:"✓";color:var(--good);font-weight:800}
.detail{padding:4px 8px 8px;display:flex;flex-direction:column;gap:10px}
.detail .answer-main{justify-content:flex-start}
.detail .answer-sub{margin:0}
.detail .meaning{font-size:17px}
.detail .actions{grid-template-columns:1fr}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:calc(var(--tabbar) + env(safe-area-inset-bottom) + 14px);transform:translateX(-50%);z-index:30;
  background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:12px;font-size:14px;font-weight:600;max-width:calc(100% - 32px);box-shadow:var(--shadow);animation:up2 .2s ease}
@keyframes up2{from{opacity:0;transform:translate(-50%,8px)}}

@media (min-width:600px){
  .screens{padding-top:10px}
  .card{min-height:300px}
}
@media (max-width:400px){
  .brand-text span{display:none}
  .brand-text b{font-size:15px}
}
@media (max-width:360px){
  .brand-text{display:none}
  .seg button{padding:0 8px}
  .btn{padding:0 8px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}