:root{--primary:#5036d3}body{color:#222;background:#f5f5f7;margin:0;font-family:Arial,sans-serif}header{background:#f2f2f2;border-bottom:1px solid #ddd;padding:1rem}nav{align-items:center;gap:1.5rem;display:flex}nav a{color:#333;margin-right:1rem;text-decoration:none}.home-page{color:#202344;background:#f5f7ff;min-height:80vh;padding:64px 24px}.home-hero{text-align:center;background:#fff;border:1px solid #e4e7f3;border-radius:24px;max-width:1000px;margin:0 auto;padding:56px 40px;box-shadow:0 12px 35px #2a306414}.home-eyebrow{color:#635bdb;letter-spacing:2px;font-size:13px;font-weight:700}.home-hero h2{margin:20px 0;font-size:clamp(32px,5vw,48px);line-height:1.15}.home-description{color:#656b80;max-width:600px;margin:0 auto;font-size:18px;line-height:1.7}.home-actions{flex-wrap:wrap;justify-content:center;gap:16px;margin-top:32px;display:flex}.home-button{border:2px solid #635bdb;border-radius:10px;padding:14px 24px;font-size:16px;font-weight:600;text-decoration:none;transition:transform .2s,background .2s;display:inline-block}.home-button:hover{transform:translateY(-2px)}.home-button-primary{color:#fff;background:#635bdb}.home-button-primary:hover{background:#5048c5}.home-button-secondary{color:#635bdb;background:#fff}.home-button-secondary:hover{background:#f0efff}.home-features{text-align:left;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:56px;display:grid}.home-feature{background:#f8f8ff;border:1px solid #e9e8fa;border-radius:16px;padding:24px}.home-feature-icon{font-size:28px}.home-feature h3{margin:14px 0 8px}.home-feature p{color:#656b80;margin-bottom:0;line-height:1.5}@media (width<=600px){.home-page{padding:28px 14px}.home-hero{padding:36px 20px}.home-features{grid-template-columns:1fr;margin-top:36px}}.nav-button{color:#fff;font:inherit;cursor:pointer;background-color:#7c3aed;border:2px solid #7c3aed;border-radius:8px;padding:10px 20px;font-weight:600;text-decoration:none;transition:background-color .2s,border-color .2s;display:inline-block}.nav-button:hover{background-color:#6d28d9;border-color:#6d28d9}.nav-button-primary{color:#fff;background-color:#7c3aed}.nav-button-primary:hover{background-color:#6d28d9}button{border:1px solid var(--primary);background:var(--primary);color:#fff;cursor:pointer;border-radius:4px;padding:.7rem 1.1rem}button:disabled{cursor:default;opacity:.45}button:hover:not(:disabled){background:#4c35b9}.nav-button-dashboard{border:1px solid var(--primary);background:var(--primary);color:#fff;cursor:pointer;font:inherit;border-radius:8px;padding:.7rem 1.1rem;text-decoration:none;display:inline-block}.nav-button-dashboard:hover{background:#4c35b9}.student-quiz-page{box-sizing:border-box;justify-content:center;min-height:calc(100vh - 5rem);padding:2rem 1rem;display:flex}.student-quiz-card{background:#fff;border:1px solid #ddd;border-radius:8px;width:min(100%,36rem);padding:2rem}.student-quiz-eyebrow,.student-quiz-result-label{color:#666;text-transform:uppercase;margin:0 0 .35rem;font-size:.85rem}.student-quiz-card h1,.student-quiz-option h2,.student-quiz-question h2{color:var(--primary)}.student-quiz-card h1{margin:0 0 1.5rem}.student-quiz-error{color:#8c1f1f;border:1px solid #f0c0c0;padding:.8rem}.student-quiz-list{gap:1rem;display:grid}.student-quiz-option{border:1px solid #ddd;justify-content:space-between;align-items:center;gap:1rem;padding:1rem;display:flex}.student-quiz-option h2,.student-quiz-option p{margin:0 0 .35rem}.student-quiz-option span,.student-quiz-progress{color:#666;font-size:.9rem}.student-quiz-progress{justify-content:space-between;margin-bottom:1rem;display:flex}.student-quiz-question h2{margin:0 0 1.5rem;font-size:1.35rem}.student-quiz-answers{gap:.75rem;display:grid}.student-quiz-answer{color:#222;text-align:left;background:#fff}.student-quiz-answer:hover:not(:disabled){background:#f1edff}.student-quiz-answer.selected{background:var(--primary);border-color:var(--primary);color:#fff}.student-quiz-actions{justify-content:space-between;margin-top:1.5rem;display:flex}.student-quiz-result{text-align:center}.teacher-quiz-form{gap:1rem;display:grid}.teacher-quiz-form label{gap:.35rem;font-weight:600;display:grid}.teacher-quiz-form input,.teacher-quiz-form select,.teacher-quiz-form textarea{box-sizing:border-box;font:inherit;border:1px solid #ccc;border-radius:4px;width:100%;padding:.7rem}.teacher-quiz-form textarea{resize:vertical;min-height:5rem}.student-quiz-score{color:var(--primary);margin:.5rem 0;font-size:2.5rem;font-weight:700}@media (width<=480px){.student-quiz-card{border-left:0;border-right:0;border-radius:0;padding:1.5rem 1rem}.student-quiz-option{flex-direction:column;align-items:stretch}.student-quiz-actions{gap:1rem}}