:root{--paper:#f7f3ea;--ink:#1d2d28;--muted:#65726d;--green:#245c4b;--mint:#dce9df;--lime:#d9e8a6;--cream:#fffdf8;--rust:#b45336;--line:#deddd4;--shadow:0 20px 55px rgba(32,52,45,.12);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
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h2,.library-head h1,.sheet-head h2{font:500 32px Georgia,"Songti SC",serif;margin:0}.text-btn{border:0;background:none;color:var(--green);font-weight:750}.day-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.day-card{background:rgba(255,253,248,.76);border:1px solid var(--line);border-radius:19px;padding:20px;text-align:left;min-height:155px;transition:.2s;position:relative}.day-card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(32,52,45,.08);border-color:#afbdad}.day-card.is-next{outline:2px solid var(--green);outline-offset:2px}.day-date{font-weight:800}.day-label{color:var(--muted);font-size:12px}.day-card h3{font:500 24px Georgia,"Songti SC",serif;margin:18px 0 9px}.mini-track{height:5px;background:#e7e7df;border-radius:5px;overflow:hidden}.mini-track span{display:block;height:100%;background:var(--green)}.day-footer{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:8px}.done-badge{position:absolute;right:16px;top:16px;color:var(--green)}.insight-card{margin-top:34px;display:flex;gap:15px;align-items:center;border-top:1px solid var(--line);padding:28px 6px}.insight-icon{width:42px;height:42px;border-radius:50%;background:var(--mint);display:grid;place-items:center;color:var(--green)}.insight-card h3{margin:0 0 5px;font-size:14px}.insight-card p{margin:0;color:var(--muted);font-size:13px}.study-head{display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.back-btn,.pill-btn{border:0;background:none;font-weight:750}.pill-btn{justify-self:end;background:#e6e7dc;border-radius:99px;padding:8px 13px;font-size:12px}.study-title{text-align:center}.study-title strong,.study-title span{display:block}.study-title span{color:var(--muted);font-size:12px;margin-top:4px}.progress-track{height:4px;background:#dfe0d7;border-radius:4px;margin:22px 0 10px;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--green);transition:.3s}.session-note{text-align:center;color:var(--muted);font-size:12px}.card-wrap{max-width:650px;margin:24px auto 18px;perspective:1000px}.word-card{height:min(490px,57vh);min-height:390px;background:var(--cream);border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow);padding:26px 30px;display:flex;flex-direction:column;position:relative;overflow:hidden;touch-action:pan-y;transition:transform .2s}.word-card:focus-visible{outline:3px solid var(--lime)}.word-card:before{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:var(--mint);right:-190px;top:-190px}.card-top{display:flex;justify-content:space-between;z-index:1;color:var(--muted);font-size:12px}.speak{border:0;background:var(--mint);width:42px;height:42px;border-radius:50%}.word-main{margin:auto;text-align:center;max-width:92%}.prompt,.tap-hint{font-size:12px;color:var(--muted)}.word-main h2{font:500 clamp(38px,7vw,70px)/1.05 Georgia,serif;margin:20px 0;overflow-wrap:anywhere}.answer{background:#edf3e9;border-radius:18px;padding:18px 22px;margin:0 auto auto;width:min(100%,520px);opacity:0;transform:translateY(10px);transition:.25s;pointer-events:none}.revealed .answer{opacity:1;transform:none}.answer span{font-size:10px;letter-spacing:.12em;color:var(--green);font-weight:800}.answer p{font-size:17px;line-height:1.65;margin:8px 0 0}.tap-hint{text-align:center;margin-top:15px}.revealed .tap-hint{opacity:.35}.study-actions{max-width:650px;margin:auto;display:grid;grid-template-columns:1fr 1fr;gap:12px}.study-actions button{border:0;border-radius:17px;padding:14px;display:flex;align-items:center;justify-content:center;gap:8px}.study-actions span{font-weight:800}.study-actions small{opacity:.68}.again{background:#f2ddd5;color:#73351f}.know{background:var(--green);color:white}.gesture-hint{text-align:center;color:var(--muted);font-size:11px}.library-head{display:flex;align-items:center;gap:28px;margin-bottom:24px}.filters{display:grid;grid-template-columns:1fr 180px;gap:10px;position:sticky;top:88px;z-index:3;background:var(--paper);padding:10px 0}.search{display:flex;align-items:center;gap:8px;background:white;border:1px solid var(--line);border-radius:13px;padding:0 14px}.search input,.filters select,.settings-sheet input,.settings-sheet select{border:0;background:white;min-height:46px;width:100%;outline:none}.filters select{border:1px solid var(--line);border-radius:13px;padding:0 12px}.word-list{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:15px}.word-row{background:rgba(255,255,255,.64);border:1px solid var(--line);border-radius:14px;padding:14px 16px;display:grid;grid-template-columns:45px 1fr auto;gap:12px;align-items:start}.word-row .num{color:var(--muted);font-size:11px}.word-row b{font-family:Georgia,serif;font-size:17px}.word-row p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.5}.status-dot{width:9px;height:9px;border-radius:50%;background:#d8d9d2;margin-top:6px}.status-dot.known{background:var(--green)}.status-dot.again{background:var(--rust)}dialog{border:0;padding:0;border-radius:26px;background:transparent;width:min(520px,calc(100% - 24px));box-shadow:var(--shadow)}dialog::backdrop{background:rgba(22,35,31,.48);backdrop-filter:blur(4px)}.settings-sheet{background:var(--cream);padding:28px}.sheet-head{display:flex;justify-content:space-between}.settings-sheet>label{display:block;font-size:12px;font-weight:750;margin-top:18px}.settings-sheet>label input:not([type=range]),.settings-sheet>label select{border:1px solid var(--line);border-radius:12px;padding:0 12px;margin-top:7px}.settings-sheet input[type=range]{width:80%;vertical-align:middle;margin:12px 10px 0 0}.toggle-row{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}.toggle-row b,.toggle-row small{display:block}.toggle-row small{color:var(--muted);margin-top:3px}.toggle-row input{width:42px;height:24px}.sheet-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}.wide{width:100%;margin-top:15px}.toast{position:fixed;bottom:calc(20px + 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@media(max-width:760px){.topbar{height:66px;padding:0 16px}.view{padding:28px 16px 55px}.hero{grid-template-columns:1fr}.hero-stat{display:none}.hero h1{font-size:43px}.today-card{margin:32px 0 42px;padding:24px;display:block}.today-card .primary{width:100%;margin-top:20px}.day-grid{grid-template-columns:1fr 1fr}.day-card{min-height:142px;padding:16px}.word-card{height:55vh;min-height:390px;padding:20px;border-radius:24px}.study-head{grid-template-columns:1fr auto 1fr}.study-title strong{font-size:13px}.study-actions button{display:block}.study-actions small{display:block;margin-top:3px}.word-list{grid-template-columns:1fr}.filters{top:72px;grid-template-columns:1fr 125px}.brand small{display:none}.library-head{align-items:start}.answer{max-height:170px;overflow:auto}}
@media(max-width:390px){.day-grid{grid-template-columns:1fr}.hero h1{font-size:38px}.word-card{min-height:370px}.gesture-hint{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}