*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{touch-action:manipulation}body,html{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#16181d;background:#f3f2fb;min-height:100dvh;overscroll-behavior:contain;-webkit-font-smoothing:antialiased}:root{--brand:#6d28d9;--brand2:#4338ca;--accent:#f59e0b;--ok:#16a34a;--bad:#dc2626;--muted:#6b7280;--line:#e6e4f0;--card:#fff;--pill-w:128px;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}button{font:inherit;cursor:pointer;border:none;background:none}input{font-size:16px;font-family:inherit}.app{min-height:100dvh;display:flex;flex-direction:column}.header{position:-webkit-sticky;position:sticky;top:0;z-index:400;background:#fff;padding:calc(var(--safe-top) + 12px) var(--pill-w) 12px 18px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px}.brand svg{flex:0 0 auto;border-radius:11px;box-shadow:0 2px 6px rgba(76,29,149,.25)}.header h1{margin:0;font-size:19px;font-weight:800;letter-spacing:-.3px}.header .sub{margin:2px 0 0;font-size:12.5px;color:var(--muted)}.content{flex:1 1;padding:16px;padding-bottom:calc(var(--safe-bottom) + 24px)}.btn{height:50px;padding:0 20px;border-radius:14px;background:var(--brand);color:#fff;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:transform .06s ease,opacity .15s ease}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.45}.btn.block{width:100%}.btn.ghost{background:#ece9f8;color:var(--brand)}.btn.accent{background:var(--accent)}.btn.sm{height:40px;padding:0 14px;font-size:14px;border-radius:11px}.input{width:100%;height:50px;padding:0 14px;border:1.5px solid var(--line);border-radius:14px;background:#fff;outline:none}.input:focus{border-color:var(--brand)}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;margin-bottom:14px}.card h2{margin:0 0 4px;font-size:17px}.muted{color:var(--muted);font-size:13.5px}.spacer{height:12px}.err{color:var(--bad);font-size:13.5px;margin:8px 0 0}.hero{text-align:center;padding:18px 0 10px}.hero .big{font-size:46px}.hero p{font-size:14px;max-width:300px;margin:8px auto 0;line-height:1.5}.divider,.hero p{color:var(--muted)}.divider{display:flex;align-items:center;gap:10px;font-size:12px;margin:6px 0}.divider:after,.divider:before{content:"";height:1px;background:var(--line);flex:1 1}.codebox{text-align:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-radius:18px;padding:18px;margin-bottom:14px}.codebox .label{font-size:12px;opacity:.85}.codebox .code{font-size:34px;font-weight:900;letter-spacing:6px;margin:4px 0 12px}.codebox .btn{background:hsla(0,0%,100%,.18);color:#fff}.plist{display:flex;flex-direction:column;gap:8px}.prow{gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fff}.avatar,.prow{display:flex;align-items:center}.avatar{width:34px;height:34px;border-radius:999px;background:var(--brand);color:#fff;justify-content:center;font-weight:800;font-size:14px;flex:0 0 auto}.prow .nm{font-weight:650;font-size:14px;flex:1 1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.prow .cat{font-size:12.5px;color:var(--muted)}.tag{font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;background:#ece9f8;color:var(--brand)}.tag.host{background:#fef3c7;color:#b45309}.catgrid{display:grid;grid-template-columns:1fr 1fr;grid-gap:10px;gap:10px;margin-top:6px}.catbtn{display:flex;align-items:center;gap:8px;padding:14px 12px;border:1.5px solid var(--line);border-radius:14px;background:#fff;font-size:14px;font-weight:600;text-align:left}.catbtn .ic{font-size:20px}.catbtn.on{border-color:var(--brand);background:#f4f1fd;color:var(--brand)}.catbtn:disabled{opacity:.4}.catbtn:active{transform:scale(.98)}.qmeta{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:10px}.qmeta .ic{font-size:18px}.progress{height:8px;background:#e7e4f3;border-radius:999px;overflow:hidden;margin-bottom:16px}.progress>div{height:100%;background:var(--brand);transition:width .3s ease}.qtext{font-size:20px;font-weight:750;line-height:1.3;margin:4px 0 18px}.opts{flex-direction:column}.opt,.opts{display:flex;gap:10px}.opt{text-align:left;padding:15px 16px;border-radius:14px;border:1.5px solid var(--line);background:#fff;font-size:15px;font-weight:600;align-items:center;transition:transform .06s ease}.opt:active{transform:scale(.99)}.opt .k{width:26px;height:26px;border-radius:8px;background:#ece9f8;color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;flex:0 0 auto}.opt.correct{border-color:var(--ok);background:#eafaf0}.opt.correct .k{background:var(--ok);color:#fff}.opt.wrong{border-color:var(--bad);background:#fdecec}.opt.wrong .k{background:var(--bad);color:#fff}.opt.dim{opacity:.6}.scoreboard{display:flex;flex-direction:column;gap:8px}.srow{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;background:#fff;border:1px solid var(--line)}.srow.me{border-color:var(--brand);background:#f7f5fe}.srow .rank{width:24px;font-weight:800;color:var(--muted);text-align:center}.srow .nm{flex:1 1;font-weight:650;font-size:14px}.srow .pts{font-weight:800;color:var(--brand)}.srow .pr{font-size:11px;color:var(--muted)}.medal{font-size:16px}.roundcard{border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:10px;background:#fff}.roundcard .rhead{display:flex;align-items:center;gap:8px;font-weight:700;font-size:14px;margin-bottom:8px}.roundcard .rhead .pending{margin-left:auto;font-size:11px;color:var(--muted);font-weight:600}.rstand{display:flex;justify-content:space-between;font-size:13px;padding:3px 0;color:#333}.state{text-align:center;color:var(--muted);padding:40px 16px;font-size:14px}.spinner{width:30px;height:30px;border:3px solid #ddd8f0;border-top:3px solid var(--brand);border-radius:999px;margin:0 auto 14px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.winner{text-align:center;padding:8px 0 4px}.winner .cup{font-size:54px}.winner h2{margin:8px 0 2px;font-size:24px}