:root{--aile-accent:#45b6e0;--aile-accent-dark:#2f93bb;--aile-bg:#f4f6f5;--aile-fg:#14181f;--aile-muted:#7a8290;--aile-card:#ffffff;--aile-border:rgba(20,24,31,0.1);--aile-danger:#e5645f;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}@media (prefers-color-scheme:dark){:root{--aile-bg:#10141a;--aile-fg:#f2f5f8;--aile-muted:#8b95a5;--aile-card:#1a2029;--aile-border:rgba(255,255,255,0.12)}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body,html{margin:0;padding:0;height:100%;background:var(--aile-bg);color:var(--aile-fg);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,system-ui,sans-serif;overscroll-behavior:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}button{font-family:inherit;cursor:pointer}.app{display:flex;flex-direction:column;min-height:100dvh;padding-top:var(--safe-top);padding-bottom:var(--safe-bottom)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:var(--aile-accent);color:#fff}.topbar h1{font-size:17px;font-weight:600;margin:0}.icon-btn{width:36px;height:36px;border-radius:18px;border:none;background:rgba(255,255,255,.18);color:#fff;font-size:16px;display:grid;place-items:center}.tabs{display:flex;background:var(--aile-card);border-bottom:1px solid var(--aile-border)}.tabs button{flex:1 1;padding:12px 8px;background:none;color:var(--aile-muted);font-size:14px;font-weight:600;border:none;border-bottom:2px solid transparent}.tabs button[data-active=true]{color:var(--aile-accent);border-bottom-color:var(--aile-accent)}.content{flex:1 1;padding:16px;overflow-y:auto;-webkit-overflow-scrolling:touch}.card{background:var(--aile-card);border:1px solid var(--aile-border);border-radius:16px;padding:16px}.btn{padding:12px 18px;border-radius:12px;border:none;background:var(--aile-accent);color:#fff;font-size:15px;font-weight:600}.btn:active{background:var(--aile-accent-dark)}.btn.ghost{background:transparent;color:var(--aile-fg);border:1px solid var(--aile-border)}.btn:disabled{opacity:.45}.muted{color:var(--aile-muted)}.sheet{position:fixed;inset:0;background:rgba(0,0,0,.45);display:grid;place-items:center;padding:24px;z-index:50}.sheet>div{background:var(--aile-card);border-radius:20px;padding:24px;width:100%;max-width:360px;text-align:center}.arena{max-width:420px;margin:0 auto;flex-direction:column;gap:18px}.arena,.hud{display:flex}.hud{justify-content:space-between;align-items:center;font-size:13px;color:var(--aile-muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.hud strong{color:var(--aile-fg);font-size:16px}.timer-bar{height:6px;border-radius:3px;background:var(--aile-border);overflow:hidden}.timer-bar i{display:block;height:100%;background:var(--aile-accent);transition:width .2s linear}.timer-bar[data-low=true] i{background:var(--aile-danger)}.question{background:var(--aile-card);border:1px solid var(--aile-border);border-radius:20px;padding:26px 20px;text-align:center}.question .kind{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--aile-accent)}.question .prompt{font-size:clamp(24px,8vw,34px);font-weight:600;margin:10px 0 6px;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:.02em}.question .hintline{font-size:14px;color:var(--aile-muted);margin:0}.answer-slots{display:flex;justify-content:center;flex-wrap:wrap;gap:6px;min-height:52px}.slot{width:42px;height:52px;border-radius:10px;border:2px dashed var(--aile-border);display:grid;place-items:center;font-size:22px;font-weight:700;background:transparent;color:var(--aile-fg)}.slot[data-filled=true]{border-style:solid;border-color:var(--aile-accent);background:color-mix(in srgb,var(--aile-accent) 12%,var(--aile-card))}.answer-value{text-align:center;font-size:34px;font-weight:700;min-height:46px;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:.04em}.answer-value[data-empty=true]{color:var(--aile-muted)}.tiles{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.tile{width:46px;height:54px;border-radius:12px;border:1px solid var(--aile-border);background:var(--aile-card);font-size:22px;font-weight:700;color:var(--aile-fg)}.tile:disabled{opacity:.25}.numpad{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:8px;gap:8px}.numpad button{padding:16px 0;border-radius:14px;border:1px solid var(--aile-border);background:var(--aile-card);color:var(--aile-fg);font-size:22px;font-weight:600}.numpad button:active{background:color-mix(in srgb,var(--aile-accent) 22%,var(--aile-card))}.op-row{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px}.op-row button{padding:22px 0;border-radius:16px;border:1px solid var(--aile-border);background:var(--aile-card);color:var(--aile-fg);font-size:28px;font-weight:700}.feedback{text-align:center;font-weight:600;min-height:22px}.feedback[data-ok=true]{color:var(--aile-accent)}.feedback[data-ok=false]{color:var(--aile-danger)}.streak{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;background:color-mix(in srgb,var(--aile-accent) 18%,transparent);color:var(--aile-accent);font-size:12px;font-weight:700}