:root{--bg:#f5f6fb;--card:#fff;--ink:#1c1e2b;--mute:#6b7085;--pri:#4f46e5;--ok:#16a34a;--bad:#dc2626;--line:#e4e6f0}
@media(prefers-color-scheme:dark){:root{--bg:#10121c;--card:#1a1d2c;--ink:#eef0fa;--mute:#9aa0b8;--line:#2b2f45}}
*{box-sizing:border-box}body{margin:0;font:16px/1.5 system-ui,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}
header{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;justify-content:space-between;padding:.8rem 1rem;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.logo{font-weight:800;font-size:1.3rem;color:var(--ink);text-decoration:none}.logo span{color:var(--pri)}
nav{display:flex;flex-wrap:wrap;gap:.3rem}
button{font:inherit;cursor:pointer;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:.5rem .9rem;border-radius:.6rem}
button:hover{border-color:var(--pri)}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--pri);outline-offset:2px}
button.primary,nav button.on{background:var(--pri);border-color:var(--pri);color:#fff}
button:disabled{opacity:.5;cursor:not-allowed}
.auth,.admin{display:none}body.in .auth{display:inline-block}body.admin-on .admin{display:inline-block}
main{max-width:760px;margin:1.2rem auto;padding:0 1rem;min-height:60vh}
.card{background:var(--card);border:1px solid var(--line);border-radius:1rem;padding:1.2rem;margin-bottom:1rem}
h1,h2{margin:.2rem 0 .8rem}.mute{color:var(--mute)}.row{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center}.grow{flex:1}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.6rem}
.stat{background:var(--bg);border-radius:.8rem;padding:.7rem;text-align:center}.stat b{display:block;font-size:1.4rem}
.opt{display:block;width:100%;text-align:left;margin:.4rem 0;padding:.8rem 1rem}
.opt.right{background:var(--ok);border-color:var(--ok);color:#fff}.opt.wrong{background:var(--bad);border-color:var(--bad);color:#fff}
.bar{height:6px;background:var(--line);border-radius:9px;overflow:hidden;margin:.6rem 0}.bar i{display:block;height:100%;background:var(--pri);transition:width 1s linear}
.tag{display:inline-block;background:var(--bg);border-radius:9px;padding:.1rem .6rem;font-size:.8rem;color:var(--mute)}
input,select{font:inherit;width:100%;padding:.6rem .8rem;margin:.25rem 0 .8rem;border:1px solid var(--line);border-radius:.6rem;background:var(--bg);color:var(--ink)}
label{font-size:.9rem;color:var(--mute)}
table{width:100%;border-collapse:collapse}th,td{padding:.55rem .4rem;text-align:left;border-bottom:1px solid var(--line)}td.n,th.n{text-align:right}
tr.me{background:color-mix(in srgb,var(--pri) 14%,transparent)}
.msg{padding:.6rem .8rem;border-radius:.6rem;margin:.6rem 0}.msg.err{background:#dc262620;color:var(--bad)}.msg.ok{background:#16a34a20;color:var(--ok)}
.share{display:flex;gap:.4rem;flex-wrap:wrap;justify-content:center}.share a,.share button{padding:.35rem .7rem;font-size:.85rem;text-decoration:none;color:var(--ink);border:1px solid var(--line);border-radius:.6rem;background:var(--card)}
footer{text-align:center;color:var(--mute);padding:1.5rem 1rem;font-size:.9rem}
.scroll{overflow-x:auto}.sm{font-size:.85rem}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}