:root{--bg:#f4f6fb;--card:#fff;--fg:#0f172a;--mut:#64748b;--pri:#2563eb;--pri-fg:#fff;--bd:#e2e8f0;--ok:#16a34a;--bad:#dc2626;--chip:#eef2ff;--r:16px}:root[data-theme=dark]{--bg:#0b1020;--card:#151b2e;--fg:#e8ecf6;--mut:#94a3b8;--pri:#6694ff;--pri-fg:#0b1020;--bd:#273049;--chip:#1e2745}@media (prefers-color-scheme:dark){:root[data-theme=auto]{--bg:#0b1020;--card:#151b2e;--fg:#e8ecf6;--mut:#94a3b8;--pri:#6694ff;--pri-fg:#0b1020;--bd:#273049;--chip:#1e2745}}:root[data-mode=kid]{--pri:#f97316;--r:24px;--chip:#fff3e0}:root[data-mode=kid][data-theme=dark]{--chip:#3a2a1a}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{touch-action:manipulation}body{background:var(--bg);color:var(--fg);padding-bottom:calc(76px + env(safe-area-inset-bottom));margin:0;font:16px/1.5 system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif}main{max-width:720px;margin:0 auto;padding:12px 14px}h1,h2,h3{margin:.2em 0}h1{font-size:2rem}h2{font-size:1.35rem}h3{font-size:1.1rem}p{margin:.4em 0}.muted{color:var(--mut)}.center{text-align:center}.hidden{display:none!important}.card{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);margin:12px 0;padding:16px;box-shadow:0 1px 2px #0001}.card.danger{border-color:#fecaca}.row{align-items:center;gap:10px;display:flex}.between{justify-content:space-between}.grid2{grid-template-columns:1fr 1fr;gap:10px;margin-top:12px;display:grid}.grid4{grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px;display:grid}.btn{border:1px solid var(--bd);background:var(--card);min-height:48px;color:var(--fg);font:inherit;cursor:pointer;border-radius:14px;justify-content:center;align-items:center;gap:6px;padding:10px 16px;font-weight:600;text-decoration:none;display:inline-flex}.btn.primary{background:var(--pri);color:var(--pri-fg);border-color:var(--pri)}.btn.bad{background:var(--bad);color:#fff;border-color:var(--bad)}.btn.big{min-height:56px;font-size:1.05rem}.btn.sm{min-height:38px;padding:6px 12px;font-size:.9rem}.btn:disabled{opacity:.5}.icon-btn{background:var(--chip);color:var(--pri);cursor:pointer;border:0;border-radius:50%;flex:none;place-items:center;width:40px;height:40px;display:inline-grid}.icon-btn.lg{width:52px;height:52px}.seg{background:var(--chip);border-radius:12px;gap:2px;padding:3px;display:inline-flex}.seg.wide{flex-wrap:wrap;display:flex}.seg button{color:var(--fg);font:inherit;cursor:pointer;background:0 0;border:0;border-radius:10px;flex:1;min-height:40px;padding:8px 12px;font-size:.9rem}.seg button.on{background:var(--pri);color:var(--pri-fg);font-weight:700}.stats3{text-align:center;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0;display:grid}.stats3 b{font-size:1.7rem;display:block}.stats3 span{color:var(--mut);font-size:.85rem}.hot{color:var(--bad)}.lbl{margin:14px 0 6px;font-weight:600;display:block}input[type=search],input[type=password],input[type=text],select,textarea{border:1px solid var(--bd);background:var(--card);width:100%;color:var(--fg);font:inherit;border-radius:12px;padding:12px}textarea{resize:vertical;line-height:1.6}input[type=range]{width:100%}.list{flex-direction:column;gap:8px;margin-top:10px;display:flex}.item{border:1px solid var(--bd);border-radius:12px;justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;display:flex}.item.link{color:inherit;text-decoration:none}.pill,.tag{background:var(--chip);color:var(--pri);white-space:nowrap;border-radius:99px;padding:2px 10px;font-size:.78rem;font-weight:600}.bar{background:var(--chip);border-radius:9px;height:8px;margin:8px 0;overflow:hidden}.bar i{background:var(--pri);border-radius:9px;height:100%;transition:width .3s;display:block}.chunks{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:10px;display:grid}.chunk{border:1px solid var(--bd);color:inherit;border-radius:14px;padding:12px;text-decoration:none;display:block}.chunk b{font-size:1.2rem}.chunk span{color:var(--mut);font-size:.85rem;display:block}.word{justify-content:center;align-items:center;gap:12px;margin-top:8px;display:flex}.meaning{text-align:center;font-size:1.3rem;font-weight:600}.example{background:var(--chip);text-align:center;border-radius:12px;min-height:56px;margin:14px 0;padding:12px}.imgbox{aspect-ratio:4/3;border-radius:var(--r);background:var(--chip);width:100%;max-width:360px;color:var(--mut);place-items:center;margin:10px auto;display:grid;position:relative;overflow:hidden}.imgbox img{object-fit:contain;width:100%;height:100%}.imgbox .ph{text-align:center;place-items:center;gap:8px;display:grid}.credit{color:#fff;background:#0008;border-radius:6px;padding:1px 6px;font-size:.62rem;position:absolute;bottom:4px;right:6px}.drop{border:2px dashed var(--bd);border-radius:14px;flex-wrap:wrap;align-items:center;gap:8px;min-height:64px;margin:12px 0;padding:12px;display:flex}.drop.good{border-color:var(--ok);border-style:solid}.drop.bad{border-color:var(--bad);border-style:solid}.bank{flex-wrap:wrap;gap:8px;min-height:56px;display:flex}.chip{border:1px solid var(--bd);background:var(--chip);min-height:44px;color:var(--fg);font:inherit;cursor:pointer;border-radius:12px;padding:8px 14px;font-weight:600}.chip:disabled{opacity:.7}.okmsg{color:var(--ok);font-weight:700}.badmsg{color:var(--bad);font-weight:700}.listenbox{flex-direction:column;align-items:center;gap:10px;margin:8px 0;display:flex}.chk{align-items:center;gap:8px;display:flex}.sticky{bottom:calc(72px + env(safe-area-inset-bottom));background:linear-gradient(transparent,var(--card) 30%);padding-top:10px;position:sticky}.lvrow{grid-template-columns:90px 1fr 70px;align-items:center;gap:8px;display:grid}nav{background:var(--card);border-top:1px solid var(--bd);padding-bottom:env(safe-area-inset-bottom);z-index:10;display:flex;position:fixed;bottom:0;left:0;right:0}nav a{color:var(--mut);flex-direction:column;flex:1;align-items:center;gap:2px;min-height:56px;padding:8px 0;font-size:.72rem;text-decoration:none;display:flex}nav a svg{width:24px;height:24px}nav a.on{color:var(--pri);font-weight:700}#toast{left:50%;bottom:calc(90px + env(safe-area-inset-bottom));color:#fff;opacity:0;pointer-events:none;z-index:20;background:#0f172a;border-radius:12px;max-width:90vw;padding:10px 16px;transition:all .25s;position:fixed;transform:translate(-50%,20px)}#toast.on{opacity:1;transform:translate(-50%)}@media (min-width:760px){body{padding-bottom:0;padding-left:96px}nav{border-top:0;border-right:1px solid var(--bd);flex-direction:column;width:84px;top:0;bottom:auto;right:auto}.sticky{bottom:0}}.hero h1{white-space:nowrap;font-size:1.6rem}.seg button{white-space:nowrap}.hero .row{flex-wrap:wrap}