.drill{margin:-8px 0 0;padding-bottom:96px}.drill-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:10px;display:flex}.drill-head h1{margin:0;font-size:20px}.stats{gap:6px;display:flex}.stat{border:1px solid var(--line);background:#fff;border-radius:10px;justify-items:center;min-width:52px;padding:2px 10px;display:grid}.stat small{color:var(--muted);font-size:10px}.stat b{color:var(--felt);font-variant-numeric:tabular-nums;font-size:17px;line-height:1.2}.drill .seg{background:#ebe5d6;border-radius:10px;gap:2px;margin-bottom:10px;padding:3px;display:flex}.drill .seg label{flex:1;position:relative}.drill .seg input{opacity:0;cursor:pointer;margin:0;position:absolute;inset:0}.drill .seg span{color:#4a5650;border-radius:8px;justify-content:center;align-items:center;min-height:42px;font-size:14px;font-weight:600;display:flex}.drill .seg input:checked+span{color:var(--felt);background:#fff;box-shadow:0 1px 3px #00000026}.q{background:linear-gradient(180deg, #13603d, var(--felt));color:#fff;border:0;padding:12px}.q-conds{flex-wrap:wrap;gap:6px;font-size:13px;display:flex}.q-conds span{background:#ffffff24;border-radius:999px;padding:2px 10px}.q-conds .c-main{color:#4a3300;background:#ffd166;border-radius:999px;margin:-2px -10px;padding:2px 10px;display:inline-block}.q-hand{grid-template-columns:repeat(13,1fr) 6px 1fr;align-items:end;gap:2px;max-width:560px;margin-top:12px;display:grid}.q-hand .tile,.q-melds .tile{width:100%}.q-hand .gap{width:6px}.q-hand .win{border-radius:4px;box-shadow:0 0 0 2px #ffd166}.q-hand .tile,.q-melds .tile{filter:drop-shadow(0 2px #b9ad8f);background:url(/tiles/front.svg) 50%/100% 100% no-repeat}.q-melds{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.q-melds:empty{display:none}.q-melds .meld{background:#0000002e;border-radius:6px;align-items:flex-end;gap:1px;padding:3px 5px;display:inline-flex}.q-melds .meld .tile{width:22px}.q-melds small{color:#d8eadf;align-self:center;margin-right:3px;font-size:10px}.q-hint{color:#d8eadf;margin:10px 0 0;font-size:14px}.q-ask{margin:2px 0 0;font-size:22px;font-weight:800}.choices{grid-template-columns:1fr 1fr;gap:10px;margin-top:12px;display:grid}.choices button{border:2px solid var(--line);cursor:pointer;min-height:64px;color:var(--ink);font-variant-numeric:tabular-nums;box-shadow:0 3px 0 var(--line);touch-action:manipulation;background:#fff;border-radius:14px;font-size:22px;font-weight:800;transition:transform 60ms}.choices button small{margin-left:2px;font-size:13px;font-weight:700}.choices button:active:not(:disabled){box-shadow:0 1px 0 var(--line);transform:translateY(2px)}.choices button:disabled{cursor:default;opacity:.55}.choices button.is-correct{opacity:1;color:#11683f;background:#e6f6ee;border-color:#1f8f5a;animation:.3s bounce;box-shadow:0 3px #1f8f5a}.choices button.is-wrong{opacity:1;border-color:var(--accent);color:var(--accent);box-shadow:0 3px 0 var(--accent);background:#fdeceb;animation:.3s shake}@keyframes bounce{50%{transform:scale(1.05)}}@keyframes shake{25%{transform:translate(-5px)}75%{transform:translate(5px)}}.explain{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-top:14px;padding:12px 14px}.ex-result{margin:0;font-size:20px;font-weight:800}.ex-result.ok{color:#11683f}.ex-result.ng{color:var(--accent)}.ex-answer{margin:2px 0 8px}.ex-answer b{font-size:18px}.ex-cols{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0 16px;display:grid}.ex-cols h3{margin:6px 0 2px;font-size:14px}.ex-cols ul{margin:0;padding:0;list-style:none}.ex-cols li{border-bottom:1px dotted var(--line);justify-content:space-between;padding:3px 0;font-size:14px;display:flex}.ex-link{align-items:center;min-height:44px;margin-top:6px;font-weight:700;display:inline-flex}.next-bar{z-index:20;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:linear-gradient(180deg, #fbf7ee00, var(--paper) 30%);position:fixed;bottom:0;left:0;right:0}.next-bar button{background:var(--felt);color:#fff;cursor:pointer;border:0;border-radius:14px;width:100%;max-width:520px;min-height:56px;margin:0 auto;font-size:18px;font-weight:800;display:block;box-shadow:0 6px 16px -6px #0a3a2499}.next-bar button:active{transform:translateY(1px)}@media (prefers-reduced-motion:reduce){.choices button{animation:none!important}}