:root{--primary: #4f46e5;--primary-hover: #4338ca;--primary-light: #eef2ff;--primary-glow: rgba(79, 70, 229, .15);--success: #10b981;--success-light: #ecfdf5;--warning: #f59e0b;--warning-light: #fffbeb;--danger: #ef4444;--danger-light: #fef2f2;--dark: #0f172a;--dark-surface: #1e293b;--text-main: #1e293b;--text-muted: #64748b;--bg-page: #f8fafc;--bg-card: #ffffff;--border-color: #e2e8f0;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-xl: 24px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .04)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Plus Jakarta Sans,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-page);color:var(--text-main);line-height:1.6;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:all .2s ease}input,select,textarea{font-family:inherit;outline:none}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulseGlow{0%,to{box-shadow:0 0 #ef444466}50%{box-shadow:0 0 0 8px #ef444400}}.animate-fade{animation:fadeIn .3s ease-out forwards}.container{max-width:1280px;margin:0 auto;padding:0 24px}@media(max-width:640px){.container{padding:0 14px}}.navbar{background:#fff;border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.navbar-inner{display:flex;justify-content:space-between;align-items:center;height:70px}.brand-logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:1.35rem;color:var(--primary);text-decoration:none}.brand-icon{width:42px;height:42px;background:linear-gradient(135deg,#4f46e5,#7c3aed);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 4px 10px #4f46e54d}.tests-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px;margin-top:24px}@media(max-width:480px){.tests-grid{grid-template-columns:1fr;gap:16px;margin-top:16px}}.test-card{background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;justify-content:space-between;transition:all .25s ease;position:relative;overflow:hidden}@media(max-width:480px){.test-card{padding:16px;border-radius:var(--radius-md)}}.test-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:#cbd5e1}.test-card-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.tag-blue{background:var(--primary-light);color:var(--primary)}.tag-green{background:var(--success-light);color:var(--success)}.tag-amber{background:var(--warning-light);color:var(--warning)}.exam-layout{display:grid;grid-template-columns:1fr 400px;gap:24px;height:calc(100vh - 100px);margin-top:16px}@media(max-width:1024px){.exam-layout{grid-template-columns:1fr;height:auto}}@media(max-width:768px){.exam-layout.show-passage-only .question-panel,.exam-layout.show-question-only .passage-panel{display:none!important}}.mobile-view-tabs,.mobile-quick-passage-btn{display:none}@media(max-width:768px){.mobile-view-tabs{display:flex;gap:6px;background:#e2e8f0;padding:4px;border-radius:10px;margin-top:12px}.mobile-tab-btn{flex:1;padding:8px 10px;border-radius:8px;font-size:.82rem;font-weight:700;background:transparent;color:var(--text-muted);text-align:center;border:none}.mobile-tab-btn.active{background:#fff;color:var(--primary);box-shadow:0 2px 4px #00000014}.mobile-quick-passage-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:6px;background:var(--primary-light);color:var(--primary);font-size:.78rem;font-weight:700;border:1px solid #c7d2fe;cursor:pointer}}@media(max-width:768px){.exam-header-bar{flex-direction:column!important;align-items:flex-start!important;gap:12px!important;padding:14px 16px!important}.exam-header-controls{width:100%!important;justify-content:space-between!important}.passage-panel,.question-panel{padding:16px!important}.palette-grid{grid-template-columns:repeat(5,1fr)!important;gap:6px!important;max-height:140px!important}}.passage-panel{background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border-color);padding:28px;overflow-y:auto;box-shadow:var(--shadow-sm);display:flex;flex-direction:column}.passage-tabs{display:flex;gap:8px;margin-bottom:20px;border-bottom:1px solid var(--border-color);padding-bottom:12px;overflow-x:auto}.passage-tab-btn{padding:8px 16px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:600;background:#f1f5f9;color:var(--text-muted)}.passage-tab-btn.active{background:var(--primary);color:#fff}.passage-content{font-size:1.05rem;line-height:1.8;color:#334155}.passage-content p{margin-bottom:16px;text-align:justify}.question-panel{background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border-color);padding:24px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;justify-content:space-between}.option-btn{width:100%;display:flex;align-items:flex-start;gap:14px;padding:14px 18px;border-radius:var(--radius-md);border:1.5px solid var(--border-color);background:#fff;text-align:left;font-size:.96rem;color:var(--text-main);margin-bottom:12px;transition:all .2s ease}.option-btn:hover{background:#f8fafc;border-color:#94a3b8}.option-btn.selected{background:#eef2ff;border-color:var(--primary);color:var(--primary);font-weight:600}.option-key-badge{width:28px;height:28px;border-radius:8px;background:#f1f5f9;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0}.option-btn.selected .option-key-badge{background:var(--primary);color:#fff}.palette-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:8px;margin-top:14px;max-height:190px;overflow-y:auto;padding:4px}.palette-btn{width:100%;aspect-ratio:1;border-radius:8px;font-weight:700;font-size:.85rem;display:flex;align-items:center;justify-content:center;background:#f1f5f9;color:var(--text-muted);border:1px solid transparent}.palette-btn.active{border:2px solid var(--primary);background:#fff;color:var(--primary)}.palette-btn.answered{background:var(--primary);color:#fff}.timer-box{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:var(--radius-md);font-family:JetBrains Mono,monospace;font-weight:700;font-size:1.15rem;background:#f1f5f9;color:var(--dark)}.timer-warning{background:#fef2f2;color:#dc2626;animation:pulseGlow 1.5s infinite}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a99;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}.modal-box{background:#fff;border-radius:var(--radius-xl);padding:32px;max-width:480px;width:100%;box-shadow:var(--shadow-xl);animation:fadeIn .25s ease-out}button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}@media(max-width:640px){.navbar-inner{height:auto;padding:10px 0;flex-direction:column;align-items:stretch;gap:8px}.navbar-actions{display:flex;justify-content:space-between;align-items:center;gap:8px!important;width:100%;overflow-x:auto}.hero-banner{padding:24px 18px!important;border-radius:16px!important;margin-bottom:24px!important}.hero-title{font-size:1.6rem!important;line-height:1.25!important}.score-summary-card{padding:24px 18px!important;border-radius:16px!important;flex-direction:column!important;align-items:stretch!important}.modal-box{padding:24px 18px!important;border-radius:16px!important;margin:12px}.option-btn{min-height:48px;padding:12px 14px;font-size:.94rem}.palette-grid{grid-template-columns:repeat(5,1fr)!important;gap:6px!important}}