:root{--text-scale:1;--bg:#f8fafc;--card:#fff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--brand:#0f766e;--brand-ink:#fff;--ok:#1d4ed8;--bad:#c2410c;--warn-bg:#fef3c7;--radius:14px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Noto Sans SC,sans-serif;font-size:calc(17px * var(--text-scale));-webkit-text-size-adjust:100%}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#0b1220;--card:#131c2e;--ink:#e2e8f0;--muted:#94a3b8;--line:#23314a;--brand:#14b8a6;--brand-ink:#04201d;--ok:#60a5fa;--bad:#fb923c;--warn-bg:#3b2f0b}}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);-webkit-tap-highlight-color:transparent;margin:0}.app{min-height:100dvh;padding-top:env(safe-area-inset-top);flex-direction:column;display:flex}.screen{width:100%;max-width:560px;padding:16px 16px calc(96px + env(safe-area-inset-bottom));flex:1;margin:0 auto}.stack{flex-direction:column;gap:12px;display:flex}.row{flex-wrap:wrap;gap:8px;display:flex}.row>button{flex:1}.row.between{justify-content:space-between;align-items:center}.row.between>*{flex:none}h2{margin:4px 0;font-size:1.4rem}h3{margin:8px 0 4px;font-size:1.05rem}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}.card.error{border-color:var(--bad)}.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}button{font:inherit;color:var(--ink);background:var(--card);border:1px solid var(--line);cursor:pointer;border-radius:12px;min-height:44px;padding:10px 14px}button:disabled{opacity:.45}button.primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand);font-weight:600}button.danger{border-color:var(--bad);color:var(--bad)}button.big{width:100%;min-height:56px;font-size:1.05rem}button.link{color:var(--brand);text-align:left;background:0 0;border:none;min-height:0;padding:6px 0}button.icon{vertical-align:middle;background:0 0;border:none;min-height:0;padding:0 6px;font-size:1.3rem}input,textarea,select{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:12px;width:100%;padding:12px;font-size:max(16px,1rem)}textarea{resize:vertical}.banner{text-align:center;border:none;border-radius:0;width:100%;padding:10px 16px;font-size:.9rem;display:block}.banner-update{background:var(--brand);color:var(--brand-ink);font-weight:600}.banner-warn{background:var(--warn-bg)}.tabs{background:var(--card);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);display:flex;position:fixed;bottom:0;left:0;right:0}.tabs button{color:var(--muted);background:0 0;border:none;border-radius:0;flex-direction:column;flex:1;align-items:center;gap:2px;min-height:56px;font-size:.75rem;display:flex;position:relative}.tabs button span{font-size:1.3rem}.tabs button.on{color:var(--brand);font-weight:600}.badge{background:var(--bad);color:#fff;border-radius:999px;padding:1px 6px;font-size:.7rem;font-style:normal;position:absolute;top:4px;right:calc(50% - 30px)}.segmented{background:var(--line);border-radius:12px;gap:3px;padding:3px;display:flex}.segmented button{background:0 0;border:none;border-radius:10px;flex:1}.segmented button.on{background:var(--card);font-weight:600}.levels{margin:0 0 8px;padding:0;list-style:none}.levels li{padding:6px 0}.levels li.locked{opacity:.55}.stats{gap:8px;display:flex}.stats>div{text-align:center;background:var(--bg);border-radius:10px;flex:1;padding:8px 4px}.stats b{font-size:1.4rem;display:block}.stats span{color:var(--muted);font-size:.75rem}.review .prompt{text-align:center;overflow-wrap:anywhere;padding:18px 0;font-size:1.6rem}.review .prompt.gloss{font-size:1.3rem}.prompt.hanzi,.hanzi-answer{text-align:center;font-size:3rem}.hanzi-sm{font-size:1.3rem}.answer{text-align:center;flex-direction:column;gap:8px;display:flex}.pinyin{color:var(--brand);font-size:1.4rem}.it-answer{font-size:1.8rem}.verdict{margin:0;font-weight:600}.verdict.ok{color:var(--ok)}.verdict.bad{color:var(--bad)}.hint{background:var(--warn-bg);border-radius:10px;margin:0;padding:8px 10px}.grades{gap:6px;display:flex}.grades button{flex:1;padding:8px 4px;font-size:.85rem}.grades button.on{border:2px solid var(--brand);font-weight:700}.report{flex-direction:column;gap:8px;display:flex}.queue{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.queue button{text-align:left;width:100%}.choice{align-items:flex-start;gap:8px;padding:6px 0;display:flex}.choice input{width:auto;margin-top:4px}.evidence{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--bg);border-radius:8px;max-height:300px;padding:8px;font-size:.75rem;overflow:auto}.field{flex-direction:column;gap:4px;margin:8px 0;display:flex}.field.check{flex-direction:row;align-items:flex-start;gap:10px}.field.check input{width:auto;margin-top:4px}.confirm{border:1px solid var(--bad);border-radius:10px;margin-top:8px;padding:8px 10px}a{color:var(--brand);overflow-wrap:anywhere}