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div{height:100%;background:#fff;border-radius:4px;transition:width .4s}.btn{font:inherit;font-weight:600;border:2px solid var(--sign-blue-dark);background:var(--sign-blue);color:#fff;border-radius:10px;padding:10px 20px;cursor:pointer;transition:transform .06s,filter .15s}.btn:hover:not(:disabled){filter:brightness(1.12)}.btn:active:not(:disabled){transform:scale(.97)}.btn:disabled{background:var(--lock);border-color:var(--lock);cursor:not-allowed;opacity:.7}.btn-green{background:var(--sign-green);border-color:var(--sign-green-dark)}.btn-big{font-size:1.1rem;padding:14px 28px}.btn-quiet{background:transparent;color:var(--ink-soft);border-color:#c3ccd6}.btn-quiet:hover:not(:disabled){filter:none;background:#dde3ea}.btn-danger{color:var(--bad)}.global-actions{display:flex;gap:12px;margin-bottom:28px;flex-wrap:wrap}.unit{margin-bottom:34px}.unit-header h2{font-size:1.15rem}.unit-header p{color:var(--ink-soft);font-size:.92rem;margin:2px 0 12px}.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px}.lesson-card{font:inherit;text-align:left;padding:14px 16px;cursor:pointer;transition:transform .08s,box-shadow .15s}.lesson-card:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 0 0 2px var(--sign-blue-dark),0 8px 18px #093a7c4d}.lesson-card.is-done{background:var(--sign-green);box-shadow:0 0 0 2px var(--sign-green-dark),0 4px 14px #00553040}.lesson-card.is-locked{background:var(--lock);box-shadow:0 0 0 2px #808d99;cursor:not-allowed;opacity:.75}.lesson-card-thai{font-size:1.5rem;font-weight:700;line-height:1.2}.lesson-card-title{font-weight:600;margin-top:4px}.lesson-card-status{font-size:.85rem;opacity:.9;margin-top:6px}.unit-speed{margin-top:12px}.lesson-title{font-size:1.5rem;margin-bottom:4px}.lesson-title-thai{font-weight:700;color:var(--sign-blue);margin-left:8px}.lesson-subtitle{color:var(--ink-soft);font-weight:600;margin-bottom:12px}.lesson-intro{margin-bottom:10px;max-width:68ch}.lesson-hint{color:var(--ink-soft);font-size:.9rem;margin-top:12px}.lesson-actions{display:flex;gap:12px;align-items:center;margin-top:22px;flex-wrap:wrap}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-top:18px}.card-grid-dense{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}.study-card{padding:16px}.study-card-slim{padding:12px 14px}.study-glyph{font-size:3.2rem;font-weight:700;line-height:1.15}.study-word{font-size:1.7rem;font-weight:700;line-height:1.3}.study-sound{font-size:1.05rem;font-weight:700;margin-top:2px}.study-final{font-weight:500;opacity:.85;font-size:.9rem}.study-name{font-size:.85rem;opacity:.85;margin-top:2px}.study-meaning{font-size:1rem;margin-top:2px}.study-example{margin-top:8px;font-size:.95rem}.study-example .thai{font-weight:600}.study-gloss{opacity:.85}.study-note{margin-top:8px;font-size:.85rem;background:#ffffff24;border-radius:8px;padding:6px 9px}.lookalikes{margin-top:8px;display:grid;gap:6px}.lookalike{display:flex;align-items:center;gap:10px;background:#ffd65a2e;border:1px solid rgba(255,214,90,.45);border-radius:8px;padding:6px 9px;font-size:.85rem}.lookalike-glyphs{font-size:1.55rem;font-weight:700;white-space:nowrap;line-height:1.2}.lookalike-glyphs i{font-style:normal;font-size:.85rem;opacity:.8;margin:0 5px;vertical-align:middle}.lookalike-info b{white-space:nowrap}.region-badge{display:inline-block;margin-top:6px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;background:#fff3;padding:2px 8px;border-radius:20px}.signs-study-note{padding:18px 20px;margin-top:18px;max-width:60ch}.quiz{margin-top:18px}.quiz-meter{height:8px;background:#d4dbe3;border-radius:4px;overflow:hidden}.quiz-meter-fill{height:100%;background:var(--sign-green);transition:width .3s}.quiz-counter{font-size:.85rem;color:var(--ink-soft);margin:6px 0 18px}.quiz-lead{font-weight:600;margin-bottom:14px;font-size:1.05rem}.quiz-prompt{font-size:3.4rem;font-weight:700;text-align:center;color:var(--sign-blue);padding:18px 12px;background:var(--sign-white);border:2px solid #cfd7e0;border-radius:14px;margin-bottom:18px;line-height:1.35;overflow-wrap:anywhere}.roman-prompt{font-size:2.2rem}.quiz-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}.quiz-option{font:inherit;font-weight:600;font-size:1rem;background:#fff;color:var(--ink);border:2px solid #c3ccd6;border-radius:10px;padding:12px 14px;cursor:pointer;text-align:center;transition:border-color .12s,background .12s}.quiz-option:hover:not(:disabled){border-color:var(--sign-blue)}.thai-option{font-size:1.45rem}.quiz-option.is-correct{background:var(--good);border-color:var(--sign-green-dark);color:#fff}.quiz-option.is-wrong{background:var(--bad);border-color:#8c1d17;color:#fff}.quiz-option.is-dim{opacity:.5}.quiz-feedback{margin-top:16px;padding:14px 16px;border-radius:12px;border:2px solid}.quiz-feedback.good{background:#e4f2e9;border-color:var(--good)}.quiz-feedback.bad{background:#fbe9e7;border-color:var(--bad)}.feedback-verdict{font-weight:700;margin-bottom:4px}.feedback-text{margin-bottom:12px;max-width:70ch}.quiz-exit{margin-top:22px}.quiz-summary{text-align:center;padding:36px 24px;margin-top:24px}.summary-score{font-size:3.4rem;font-weight:700}.summary-label{font-size:1.1rem;margin:6px 0 20px}.summary-buttons{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.summary-buttons .btn{border-color:#ffffff80}.summary-buttons .btn-quiet{color:#fff;background:#ffffff1f}.summary-buttons .btn-quiet:hover{background:#ffffff3d}.speed{text-align:center;padding:32px 24px;margin-top:24px}.speed h2{margin-bottom:10px}.speed p{max-width:52ch;margin:0 auto 10px}.speed-best{font-weight:700}.speed-bar{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:16px}.speed-timer{font-size:1.6rem;font-weight:700;color:var(--sign-green)}.speed-timer[data-low]{color:var(--bad)}.speed-score{font-weight:700;font-size:1.1rem}.sign{margin:0 auto 20px;width:fit-content;max-width:100%}.sign-highway{background:var(--sign-blue);border:4px solid #fff;outline:3px solid var(--sign-blue-dark);border-radius:10px;padding:18px 26px;min-width:min(420px,90vw)}.sign-highway.sign-green{background:var(--sign-green);outline-color:var(--sign-green-dark)}.sign-row{display:flex;align-items:baseline;gap:16px;color:#fff;font-size:1.9rem;font-weight:600;line-height:1.6}.sign-arrow{font-size:1.3rem}.sign-dest{flex:1}.sign-dist{font-variant-numeric:tabular-nums}.sign-welcome{background:var(--sign-blue);border:4px solid #fff;outline:3px solid var(--sign-blue-dark);border-radius:18px;padding:22px 34px;text-align:center;color:#fff;min-width:min(400px,90vw)}.sign-welcome-title{font-size:1.3rem;opacity:.95}.sign-welcome-name{font-size:2.3rem;font-weight:700;line-height:1.4;overflow-wrap:anywhere}.sign-soi{background:var(--sign-blue);border:3px solid #fff;outline:2px solid var(--sign-blue-dark);border-radius:6px;padding:8px 22px;color:#fff;font-size:1.6rem;font-weight:600}.sign-place{background:var(--sign-white);border:3px solid var(--sign-blue);border-radius:8px;padding:14px 26px;color:var(--sign-blue);font-size:1.7rem;font-weight:700;text-align:center;line-height:1.5;overflow-wrap:anywhere;max-width:min(480px,90vw)}.sign-km{background:var(--sign-white);border:3px solid var(--ink);border-radius:8px 8px 3px 3px;padding:12px 20px 8px;text-align:center;color:var(--ink)}.sign-km-name{font-size:1.3rem;font-weight:700}.sign-km-dist{font-size:2.4rem;font-weight:700;line-height:1.1}.footer{margin-top:40px;padding-top:18px;border-top:1px solid #cfd7e0;color:var(--ink-soft);font-size:.88rem}.footer p{max-width:70ch;margin-bottom:12px}@media (max-width: 560px){.quiz-prompt{font-size:2.4rem}.sign-row{font-size:1.4rem}.sign-welcome-name{font-size:1.7rem}.masthead-thai{font-size:2.3rem}}