body{background:#f6f8fb;line-height:1.7}header{position:sticky;top:0;z-index:20;box-shadow:0 4px 18px #10283d1c}main{max-width:1160px}main>h1{font-size:clamp(1.7rem,3vw,2.45rem);margin-bottom:24px}.mode-intro{padding:30px;border-radius:20px;background:linear-gradient(135deg,#17324d,#235b70);color:#fff;margin-bottom:22px;box-shadow:0 16px 35px #17324d2b}.mode-intro h2{color:#fff;font-size:clamp(1.55rem,3vw,2.25rem);margin:.2rem 0}.mode-intro p{margin:0;opacity:.9}.eyebrow{display:inline-block;color:#ffe09a;font-weight:700;font-size:.9rem}.progress{height:8px;background:#ffffff30;border-radius:20px;overflow:hidden;margin-top:22px}.progress span{display:block;height:100%;background:#f3c969;width:0;transition:width .35s}.mode-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:22px 0}.mode-card{position:relative;display:block;min-height:220px;padding:25px;border-radius:18px;background:#fff;color:var(--ink);text-decoration:none;border:1px solid #e3e8ee;box-shadow:0 8px 25px #17324d0c;transition:.2s}.mode-card:hover{transform:translateY(-4px);box-shadow:0 16px 34px #17324d1c}.mode-card h3{font-size:1.35rem;margin:12px 0 5px}.mode-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:#eaf5f3;color:#176b6f;font-size:1.5rem;font-weight:900}.mode-card.play .mode-icon{background:#f1e9fb;color:#6b35b5}.mode-card.assess .mode-icon{background:#fff3d9;color:#9a6b13}.mode-card.present .mode-icon{background:#e8f0fa;color:#255e9b}.mode-link{position:absolute;bottom:20px;color:var(--teal);font-weight:700}.quiz-stage{background:#fff;padding:clamp(20px,4vw,42px);border-radius:20px;border:1px solid #e1e7ec;box-shadow:0 12px 32px #17324d12}.quiz-stage>h2{font-size:clamp(1.25rem,2.5vw,1.75rem);margin:12px 0 24px}.question-meta span{display:inline-block;background:#edf5f5;color:#176b6f;border-radius:30px;padding:4px 12px;font-weight:700;font-size:.85rem}.answer-grid{display:grid;gap:12px}.answer-choice{display:flex;align-items:center;gap:14px;width:100%;min-height:64px;background:#fff;color:#243342;text-align:right;border:2px solid #dde5eb;border-radius:14px;padding:12px 16px;transition:.15s}.answer-choice:hover:not(:disabled){border-color:#176b6f;background:#f3fafa}.choice-key{display:grid;place-items:center;flex:0 0 34px;height:34px;border-radius:9px;background:#eaf0f4;font-weight:900}.answer-choice.is-correct{border-color:#1f8a5b;background:#eaf8f1}.answer-choice.is-correct .choice-key{background:#1f8a5b;color:#fff}.answer-choice.is-wrong{border-color:#c84b4b;background:#fff0f0}.answer-choice.is-wrong .choice-key{background:#c84b4b;color:#fff}.feedback{margin-top:22px;padding:18px 20px;border-radius:14px;border-right:5px solid}.feedback.correct{background:#eaf8f1;border-color:#1f8a5b}.feedback.wrong{background:#fff2ed;border-color:#d0643e}.feedback h3{margin:0}.result-ring{width:150px;height:150px;margin:auto;border-radius:50%;display:grid;place-content:center;text-align:center;background:#edf8f5;border:10px solid #176b6f}.result-ring strong{font-size:3rem;color:#176b6f;line-height:1}.result-ring span{color:#647384}fieldset.card{border:1px solid #dfe6ec;margin-bottom:18px}fieldset.card legend{padding:0 8px;line-height:1.6}.option{padding:10px 12px;margin:5px 0;border:1px solid #e3e8ed}.option:hover{background:#f2f8f7;border-color:#a8cbc8}@media(max-width:700px){.mode-grid{grid-template-columns:1fr}.mode-card{min-height:195px}.mode-intro{padding:22px}.quiz-stage{padding:18px}.answer-choice{min-height:58px}}