*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--primary:#1a1a2e;--primary-light:#16213e;--accent:#0f3460;--accent-bright:#e94560;--success:#2ecc71;--warning:#f39c12;--danger:#e74c3c;--bg:#f0f2f5;--card:#fff;--text:#1a1a2e;--text-light:#6c757d;--border:#e0e0e0;--radius:12px;--shadow:0 2px 12px #00000014;--shadow-lg:0 8px 30px #0000001f;--transition:all .2s ease}html{-webkit-font-smoothing:antialiased;font-size:16px}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:Inter,Segoe UI,system-ui,-apple-system,sans-serif;line-height:1.6}#root{flex-direction:column;min-height:100vh;display:flex}h1,h2,h3,h4{font-weight:700;line-height:1.3}.app-container{width:100%;max-width:900px;margin:0 auto;padding:20px}.app-header{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--accent) 100%);color:#fff;border-radius:var(--radius);text-align:center;box-shadow:var(--shadow-lg);margin-bottom:24px;padding:24px 32px}.app-header h1{letter-spacing:-.5px;margin-bottom:4px;font-size:1.75rem}.app-header p{opacity:.85;font-size:.95rem}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px;padding:32px}.form-group{margin-bottom:20px}.form-group label{color:var(--text);margin-bottom:6px;font-size:.9rem;font-weight:600;display:block}.form-group label .required{color:var(--accent-bright);margin-left:2px}.form-input{border:2px solid var(--border);width:100%;transition:var(--transition);background:#fff;border-radius:8px;padding:12px 16px;font-family:inherit;font-size:1rem}.form-input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #0f34601a}.form-input::placeholder{color:#adb5bd}.btn{cursor:pointer;transition:var(--transition);border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:12px 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20px;display:flex;position:sticky;top:0}.timer-display{font-variant-numeric:tabular-nums;font-size:1.5rem;font-weight:700}.timer-display.warning{color:var(--warning)}.timer-display.danger{color:var(--danger);animation:1s infinite pulse}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.timer-progress{background:var(--border);border-radius:2px;width:100%;height:4px;margin-top:8px;overflow:hidden}.timer-progress-fill{background:linear-gradient(90deg, var(--success), var(--warning), var(--danger));border-radius:2px;height:100%;transition:width 1s linear}.question-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px;padding:32px}.question-badge{text-transform:uppercase;letter-spacing:.5px;border-radius:20px;margin-bottom:16px;padding:4px 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.option-letter{background:var(--accent);color:#fff}.option-text{padding-top:4px;line-height:1.5}.question-nav{justify-content:space-between;align-items:center;gap:12px;margin-top:8px;display:flex}.progress-bar{flex-wrap:wrap;gap:4px;margin-bottom:20px;display:flex}.progress-dot{border:2px solid var(--border);cursor:pointer;width:28px;height:28px;transition:var(--transition);background:#fff;border-radius:50%;justify-content:center;align-items:center;font-size:.7rem;font-weight:600;display:flex}.progress-dot.answered{background:var(--accent);border-color:var(--accent);color:#fff}.progress-dot.current{border-color:var(--accent-bright);color:var(--accent-bright);box-shadow:0 0 0 3px #e9456033}.webcam-container{width:160px;height:120px;box-shadow:var(--shadow-lg);border:3px solid var(--primary);z-index:50;border-radius:10px;position:fixed;bottom:20px;right:20px;overflow:hidden}.webcam-container 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.btn{width:100%}}.timer-bar{z-index:100;position:sticky;top:0}.loading-spinner p{color:var(--text-light);font-size:1.1rem}.card,.question-card{animation:.3s fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}