:root{--bg:#fff;--text:#1d1d1b;--muted:#6b6b66;--line:#e7e5df;--soft:#f7f6f2;--accent:#ffc800;--accent-strong:#e6b400;--accent-soft:#fff6d1;--correct:#1f7a3d;--correct-soft:#e5f4ea;--almost:#8a5a00;--almost-soft:#fff1d6;--wrong:#b3261e;--wrong-soft:#fbe9e7;--radius:14px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--text);margin:0}body{-webkit-text-size-adjust:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:17px;line-height:1.5}a{color:inherit}h1{margin:.4rem 0 .6rem;font-size:1.6rem;line-height:1.25}h2{margin:1.8rem 0 .6rem;font-size:1.1rem}p{margin:.5rem 0}.app{flex-direction:column;min-height:100vh;display:flex}.topbar{border-bottom:1px solid var(--line);background:var(--bg);z-index:1;justify-content:space-between;align-items:center;padding:12px 16px;display:flex;position:sticky;top:0}.brand{align-items:center;gap:10px;font-weight:700;text-decoration:none;display:flex}.brand-mark{background:var(--accent);border-radius:8px;padding:2px 8px;font-size:.9rem}.icon-link{place-items:center;min-width:44px;min-height:44px;font-size:1.4rem;text-decoration:none;display:grid}.content{flex:1;width:100%;max-width:640px;margin:0 auto;padding:16px 16px 40px}.footer{border-top:1px solid var(--line);color:var(--muted);text-align:center;flex-direction:column;align-items:center;gap:6px;padding:16px;font-size:.85rem;display:flex}.muted{color:var(--muted)}.small{font-size:.875rem}.center{text-align:center}.right{text-align:right;display:block}.lead{font-size:1.1rem}.stack{flex-direction:column;gap:12px;display:flex}.back{color:var(--muted);min-height:44px;padding:8px 0;text-decoration:none;display:inline-block}.btn{border-radius:var(--radius);min-height:48px;font:inherit;cursor:pointer;background:var(--soft);color:var(--text);border:2px solid #0000;justify-content:center;align-items:center;gap:8px;padding:10px 18px;font-weight:600;text-decoration:none;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent)}.btn-primary:not(:disabled):hover{background:var(--accent-strong)}.btn-secondary{background:var(--bg);border-color:var(--line)}.btn-link{color:var(--muted);background:0 0;border:none;width:100%;font-weight:500;text-decoration:underline}.btn-block{width:100%;margin-top:12px}.btn-correct{background:var(--correct-soft);color:var(--correct)}.btn-almost{background:var(--almost-soft);color:var(--almost)}.btn-wrong{background:var(--wrong-soft);color:var(--wrong)}.btn-icon{border:1px solid var(--line);cursor:pointer;vertical-align:middle;background:0 0;border-radius:50%;width:40px;height:40px;margin-left:6px;font-size:1.05rem}:focus-visible{outline:3px solid var(--text);outline-offset:2px}.field{flex-direction:column;flex:1;gap:6px;display:flex}.field>span:first-child{font-weight:600}.field-row{flex-wrap:wrap;gap:12px;margin:16px 0;display:flex}input[type=text],select{font:inherit;border:2px solid var(--line);border-radius:var(--radius);background:var(--bg);width:100%;min-height:50px;color:var(--text);padding:10px 14px}input[type=text]:focus,select:focus{border-color:var(--accent);outline:none}input[type=text]:disabled{background:var(--soft)}.hp{width:1px;height:1px;position:absolute;left:-10000px;overflow:hidden}.regions{border:none;margin:16px 0;padding:0}.regions legend{padding:0;font-weight:600}.chips{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.chip{border:2px solid var(--line);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:999px;align-items:center;min-height:44px;padding:8px 14px;display:inline-flex}.chip input{opacity:0;pointer-events:none;position:absolute}.chip:focus-within{outline:3px solid var(--text);outline-offset:2px}.chip-on{background:var(--accent-soft);border-color:var(--accent);font-weight:600}.notice{background:var(--accent-soft);border-radius:var(--radius);margin:16px 0;padding:14px 16px}.notice-error{background:var(--wrong-soft);color:var(--wrong)}.link-list{padding-left:1.2rem}.link-list li{margin:6px 0}.topic-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.topic-item{border:2px solid var(--line);border-radius:var(--radius);flex-direction:column;gap:2px;padding:14px 16px;text-decoration:none;display:flex}.topic-item:hover{border-color:var(--accent)}.topic-title{font-weight:600}.topic-meta{color:var(--muted);font-size:.875rem}.card{border:2px solid var(--line);border-radius:18px;margin:12px 0;padding:20px 18px}.eyebrow{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 6px;font-size:.75rem;font-weight:600}.prompt{margin:4px 0 16px;font-size:1.45rem;font-weight:600;line-height:1.35}.big{font-size:1.5rem;font-weight:700}.options{flex-direction:column;gap:10px;display:flex}.option{font:inherit;text-align:left;border-radius:var(--radius);cursor:pointer;border:2px solid var(--line);background:var(--bg);min-height:52px;color:var(--text);align-items:center;gap:12px;padding:12px 14px;display:flex}.option:not(:disabled):hover{border-color:var(--accent)}.option:disabled{cursor:default}.option-key{background:var(--soft);width:26px;height:26px;color:var(--muted);border-radius:50%;flex:none;place-items:center;font-size:.8rem;font-weight:700;display:grid}.option-pending{border-color:var(--accent)}.option-correct{border-color:var(--correct);background:var(--correct-soft)}.option-wrong{border-color:var(--wrong);background:var(--wrong-soft)}.option-dim{opacity:.55}.result{border-radius:var(--radius);margin:14px 0 0;padding:10px 14px;font-weight:600}.result-correct{background:var(--correct-soft);color:var(--correct)}.result-almost{background:var(--almost-soft);color:var(--almost)}.result-wrong{background:var(--wrong-soft);color:var(--wrong)}.solution{border-top:1px dashed var(--line);margin-top:16px;padding-top:12px}.answer{font-size:1.3rem;font-weight:600}.note{background:var(--soft);border-radius:10px;padding:8px 12px;font-size:.95rem}.self-rate{margin-top:14px}.self-rate-buttons{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.self-rate-buttons .btn{padding:10px 6px;font-size:.95rem}.speak{white-space:nowrap}.speak-hint{color:var(--muted);margin-top:4px;font-size:.75rem;font-weight:400;display:block}.listen{grid-template-columns:2fr 1fr;gap:10px;margin:8px 0 16px;display:grid}.btn-listen{background:var(--accent);min-height:64px;font-size:1.1rem}.btn-listen+.btn{min-height:64px}.progress{background:var(--soft);border-radius:999px;height:10px;margin:10px 0;overflow:hidden}.progress-fill{background:var(--accent);height:100%;transition:width .3s}.progress-card{border:2px solid var(--line);border-radius:18px;margin:12px 0;padding:16px 18px}.level-badge{background:var(--accent-soft);border-radius:999px;margin:0 0 6px;padding:4px 12px;font-weight:600;display:inline-block}.stats{grid-template-columns:1fr 1fr;gap:10px;margin:12px 0;display:grid}.stats-3{grid-template-columns:repeat(3,1fr)}.stats div{background:var(--soft);border-radius:12px;padding:10px 12px}.stats dt{color:var(--muted);font-size:.8rem}.stats dd{margin:2px 0 0;font-size:1.1rem;font-weight:700}@media (prefers-reduced-motion:reduce){.progress-fill{transition:none}}.steps{grid-template-columns:repeat(4,1fr);gap:6px;margin:4px 0 20px;padding:0;list-style:none;display:grid}.steps li{background:var(--soft);border-radius:999px;height:6px}.steps li.step-on{background:var(--accent)}.slide{text-align:center;padding-top:12px}.slide-icon{margin:8px 0;font-size:3.2rem}.slide .lead{color:var(--muted)}.dots{justify-content:center;gap:8px;margin:20px 0 8px;display:flex}.dot{background:var(--line);border-radius:50%;width:8px;height:8px}.dot-on{background:var(--accent)}button.chip{background:var(--bg);font:inherit;color:var(--text)}button.chip:hover{border-color:var(--accent)}.pick-list{flex-direction:column;gap:10px;margin:12px 0;padding:0;list-style:none;display:flex}.pick{border:2px solid var(--line);border-radius:var(--radius);cursor:pointer;align-items:flex-start;gap:12px;padding:14px 16px;display:flex}.pick>span{flex-direction:column;gap:2px;display:flex}.pick input{width:22px;height:22px;accent-color:var(--accent-strong);flex:none;margin-top:2px}.pick-on{border-color:var(--accent);background:var(--accent-soft)}.pick-disabled{opacity:.5;cursor:not-allowed}.level-change{font-weight:600}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}