@import"https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap";:root{--font-display: "Space Grotesk", sans-serif;--font-body: "Inter", "Segoe UI", system-ui, sans-serif;--font-mono: "JetBrains Mono", "SF Mono", monospace;--color-primary-50: #f0f4f8;--color-primary-100: #d9e2ec;--color-primary-200: #bcccdc;--color-primary-500: #627d98;--color-primary-600: #486581;--color-primary-700: #334e68;--color-primary-800: #243b53;--color-primary-900: #0f172a;--color-accent-500: #f59e0b;--color-accent-600: #d97706;--color-accent-700: #b45309;--color-success-500: #16a34a;--color-success-600: #15803d;--color-success-700: #166534;--color-error-500: #ef4444;--color-error-600: #dc2626;--color-error-700: #991b1b;--color-info-500: #4338ca;--color-info-50: #eef2ff;--color-gray-1: #eceae4;--color-gray-2: #a8a29e;--color-gray-3: #78716c;--color-gray-4: #1c1917;--color-background: #f8f7f4;--color-surface: #fafaf8;--color-surface-elevated: #ffffff;--color-border: #eceae4;--color-text-primary: #1c1917;--color-text-secondary: #a8a29e;--color-text-muted: #78716c;--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-5: 1.25rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--spacing-10: 2.5rem;--spacing-12: 3rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .625rem;--radius-pill: 1.25rem;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--z-modal-backdrop: 1200;--z-modal: 1300;--z-tooltip: 1500;--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 14px;--font-size-lg: 16px;--font-size-xl: 20px;--font-size-2xl: 24px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased}body{font-family:var(--font-body);font-size:var(--font-size-base);line-height:1.4;color:var(--color-text-primary);background:var(--color-background);min-height:100vh}#root{min-height:100vh;display:flex;flex-direction:column}h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.2;color:var(--color-text-primary)}a{color:var(--color-accent-600);text-decoration:none}a:hover{text-decoration:underline}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-2);padding:8px 16px;font-family:var(--font-body);font-size:var(--font-size-base);font-weight:500;border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-accent-500);color:var(--color-primary-900)}.btn-primary:hover:not(:disabled){background:var(--color-accent-600)}.btn-primary:focus-visible{outline:2px solid var(--color-accent-500);outline-offset:2px}.btn-secondary{background:transparent;color:var(--color-primary-900);border:1px solid var(--color-gray-1)}.btn-secondary:hover:not(:disabled){background:#eceae433}.btn-sm{padding:6px 12px;font-size:var(--font-size-sm)}.btn-lg{padding:12px 24px;font-size:var(--font-size-lg)}.input{width:100%;padding:8px 12px;font-family:var(--font-body);font-size:var(--font-size-base);color:var(--color-text-primary);background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:var(--radius-md);transition:border-color var(--transition-fast)}.input:focus{outline:none;border-color:var(--color-accent-500);box-shadow:0 0 0 2px #f59e0b26}.input.error{border-color:var(--color-error-600)}.input.error:focus{border-color:var(--color-error-600);box-shadow:0 0 0 2px #dc262626}.input::placeholder{color:var(--color-gray-3)}textarea.input{resize:vertical;min-height:120px;line-height:1.6}.spinner{display:inline-block;width:24px;height:24px;border:3px solid var(--color-gray-1);border-top-color:var(--color-primary-600);border-radius:50%;animation:spin .8s linear infinite}.spinner-sm{width:16px;height:16px;border-width:2px}@keyframes spin{to{transform:rotate(360deg)}}.auth-container{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--spacing-6);background:var(--color-background)}.auth-content{position:relative;z-index:10;width:100%;max-width:420px}.auth-card{background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-10)}.auth-header{text-align:center;margin-bottom:var(--spacing-6)}.auth-title{font-family:var(--font-display);font-size:22px;font-weight:700;color:var(--color-primary-900);margin-bottom:var(--spacing-2);letter-spacing:-.4px}.auth-subtitle{font-size:var(--font-size-base);color:var(--color-gray-2)}.auth-error{background:#dc26261a;color:var(--color-error-700);padding:var(--spacing-3);border-radius:var(--radius-md);margin-bottom:var(--spacing-4);font-size:var(--font-size-sm);border:1px solid var(--color-error-600)}.auth-submit{width:100%;margin-top:var(--spacing-4)}.auth-footer{text-align:center;margin-top:var(--spacing-6);padding-top:var(--spacing-4);border-top:1px solid var(--color-border)}.auth-footer p{font-size:var(--font-size-sm);color:var(--color-gray-3)}.auth-link-bold{color:var(--color-accent-600);font-weight:600}.auth-link-bold:hover{text-decoration:underline}.card{background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.card-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 12px;border-bottom:1px solid var(--color-border)}.card-title{font-family:var(--font-display);font-size:var(--font-size-lg);font-weight:600;color:var(--color-gray-4)}.badge{display:inline-flex;align-items:center;padding:3px 8px;font-size:11px;font-weight:600;border-radius:var(--radius-pill);line-height:1;white-space:nowrap}.badge-draft{background:var(--color-gray-1);color:var(--color-primary-900)}.badge-live{background:#f59e0b1a;color:var(--color-accent-700)}.badge-completed{background:#16a34a1a;color:var(--color-success-700)}.badge-closed{background:var(--color-gray-1);color:var(--color-gray-3)}.error-banner{padding:var(--spacing-3) var(--spacing-4);background:#dc26261a;border:1px solid var(--color-error-600);border-radius:var(--radius-md);color:var(--color-error-700);margin-bottom:var(--spacing-4);font-size:var(--font-size-sm);display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-2)}.loading-container{display:flex;align-items:center;justify-content:center;min-height:60vh;color:var(--color-gray-3);font-size:var(--font-size-base);gap:var(--spacing-3)}.exam-taking-container{min-height:100vh;display:flex;flex-direction:column;background:var(--color-background)}.exam-header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:var(--color-surface-elevated);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:100}.exam-header-left h2{font-size:18px;margin-bottom:2px}.question-counter{font-size:var(--font-size-sm);color:var(--color-gray-3)}.exam-header-right{display:flex;align-items:center;gap:var(--spacing-4)}.timer{font-family:var(--font-mono);font-size:20px;font-weight:600;color:var(--color-primary-900);padding:4px 12px;background:var(--color-surface);border-radius:var(--radius-md)}.timer.timer-warning{color:var(--color-error-600);animation:pulse 1s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}.progress-bar{height:4px;background:var(--color-gray-1)}.progress-fill{height:100%;background:var(--color-accent-500);transition:width .3s ease}.exam-content{flex:1;display:flex;gap:24px;padding:24px;max-width:1200px;margin:0 auto;width:100%}.question-panel{flex:1}.question-card{background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px}.question-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.question-number{font-family:var(--font-display);font-size:var(--font-size-sm);font-weight:600;color:var(--color-primary-900);background:var(--color-primary-50);padding:4px 10px;border-radius:var(--radius-pill)}.question-meta{display:flex;gap:8px;align-items:center}.question-type{font-size:11px;color:var(--color-gray-3);text-transform:uppercase;letter-spacing:.06em}.question-points{font-size:11px;font-weight:600;color:var(--color-accent-600)}.question-text{font-size:var(--font-size-lg);line-height:1.5;margin-bottom:12px}.question-figure{margin:0 0 14px;padding:8px;border:1px solid var(--color-border, #ddd);border-radius:6px;background:#fff}.question-figure img{display:block;width:100%;height:auto;max-height:60vh;object-fit:contain;margin:0 auto}.question-description{font-size:var(--font-size-sm);color:var(--color-gray-3);margin-bottom:16px}.answer-section{margin-top:16px}.answer-options{display:flex;flex-direction:column;gap:8px}.option-label{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.option-label:hover{border-color:var(--color-accent-500);background:#f59e0b0a}.option-label input[type=radio]{accent-color:var(--color-accent-500)}.option-text{font-size:var(--font-size-base)}.answer-input{width:100%;padding:10px 14px;font-family:var(--font-body);font-size:var(--font-size-base);border:1px solid var(--color-border);border-radius:var(--radius-md);outline:none;transition:border-color var(--transition-fast)}.answer-input:focus{border-color:var(--color-accent-500);box-shadow:0 0 0 2px #f59e0b26}.answer-textarea{width:100%;padding:10px 14px;font-family:var(--font-body);font-size:var(--font-size-base);border:1px solid var(--color-border);border-radius:var(--radius-md);outline:none;resize:vertical;min-height:120px;line-height:1.6;transition:border-color var(--transition-fast)}.answer-textarea:focus{border-color:var(--color-accent-500);box-shadow:0 0 0 2px #f59e0b26}.question-navigation{display:flex;justify-content:space-between;margin-top:24px;padding-top:16px;border-top:1px solid var(--color-border)}.question-navigator{width:220px;flex-shrink:0;background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:16px;height:fit-content;position:sticky;top:80px}.question-navigator h3{font-size:var(--font-size-sm);font-weight:600;margin-bottom:12px}.question-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-bottom:16px}.question-button{width:100%;aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:500;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);cursor:pointer;color:var(--color-text-primary);transition:all var(--transition-fast)}.question-button:hover{border-color:var(--color-accent-500)}.question-button.active{background:var(--color-accent-500);color:var(--color-primary-900);border-color:var(--color-accent-500);font-weight:700}.question-button.answered{background:var(--color-primary-50);border-color:var(--color-primary-200)}.navigator-legend{display:flex;flex-direction:column;gap:6px}.legend-item{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--color-gray-3)}.legend-color{width:12px;height:12px;border-radius:3px}.legend-color.answered{background:var(--color-primary-50);border:1px solid var(--color-primary-200)}.legend-color.unanswered{background:var(--color-surface);border:1px solid var(--color-border)}.pre-exam-rules-overlay{position:fixed;inset:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal-backdrop);padding:var(--spacing-6)}.pre-exam-rules-card{background:var(--color-surface-elevated);border-radius:var(--radius-lg);max-width:640px;width:100%;max-height:90vh;overflow-y:auto}.rules-header{padding:24px 32px 16px;border-bottom:1px solid var(--color-border);text-align:center}.rules-header h2{font-size:20px;margin-bottom:4px}.rules-header h3{font-size:var(--font-size-base);color:var(--color-gray-3);font-weight:400}.rules-subtitle{font-size:var(--font-size-sm);color:var(--color-gray-3);margin-top:4px}.rules-content{padding:20px 32px}.rules-section{margin-bottom:20px}.rules-section h4{font-size:var(--font-size-base);margin-bottom:8px}.rules-list{padding-left:20px;display:flex;flex-direction:column;gap:6px}.rules-list li{font-size:var(--font-size-sm);color:var(--color-text-primary);line-height:1.5}.rules-list li strong{font-weight:600}.rule-warning{color:var(--color-error-600);font-weight:500}.warning-text{font-size:var(--font-size-sm);color:var(--color-gray-3);margin-bottom:8px}.proctor-section{background:#ef44440a;border:1px solid rgba(239,68,68,.15);border-radius:var(--radius-md);padding:16px}.custom-rules{margin-top:8px;padding:8px 12px;background:var(--color-surface);border-radius:var(--radius-md);font-size:var(--font-size-sm)}.important-notice{background:#f59e0b0f;border:1px solid rgba(245,158,11,.2);border-radius:var(--radius-md);padding:16px}.rules-footer{padding:16px 32px 24px;border-top:1px solid var(--color-border)}.agreement-text{font-size:var(--font-size-sm);color:var(--color-gray-3);margin-bottom:16px;text-align:center}.rules-actions{display:flex;gap:12px;justify-content:flex-end}.results-header{text-align:center;padding:40px 24px}.results-icon{font-size:56px;margin-bottom:8px;display:flex;align-items:center;justify-content:center}.results-icon-img{width:48px;height:48px;object-fit:contain}.results-header h1{font-size:28px}.results-header.passed h1{color:var(--color-success-600)}.results-header.failed h1{color:var(--color-text-primary)}.results-message{color:var(--color-gray-3);font-size:var(--font-size-base)}.score-card{max-width:480px;margin:0 auto 24px;text-align:center;padding:24px}.score-main{margin-bottom:24px}.score-value{font-family:var(--font-display);font-size:56px;font-weight:700;color:var(--color-primary-900)}.score-details{font-size:var(--font-size-base);color:var(--color-gray-3);margin-top:4px}.score-breakdown{display:grid;grid-template-columns:1fr 1fr;gap:12px;text-align:left}.breakdown-item{display:flex;flex-direction:column;gap:2px}.breakdown-label{font-size:11px;color:var(--color-gray-2);text-transform:uppercase;letter-spacing:.06em}.breakdown-value{font-size:var(--font-size-base);color:var(--color-text-primary)}.results-actions{display:flex;gap:12px;justify-content:center;margin-top:24px}@media (max-width: 1024px){.exam-content{gap:16px}.question-navigator{width:180px}.question-grid{grid-template-columns:repeat(4,1fr)}}@media (max-width: 768px){.exam-content{flex-direction:column;padding:16px}.question-navigator{width:100%;position:static}.exam-header{flex-direction:column;gap:8px;padding:12px 16px}.exam-header-left h2{font-size:16px}.exam-header-right{width:100%;justify-content:space-between}.exam-header-right .timer{font-size:16px}.auth-card{padding:var(--spacing-8)}.pre-exam-rules-card{max-height:95vh}.rules-header,.rules-content,.rules-footer{padding-left:20px;padding-right:20px}.score-card{padding:16px}.score-value{font-size:40px}}@media (max-width: 480px){.auth-container{padding:var(--spacing-3)}.auth-card{padding:var(--spacing-6)}.exam-header{padding:8px 12px}.exam-header-right{flex-wrap:wrap;gap:6px}.exam-header-right .btn{font-size:12px;padding:6px 10px}.exam-content{padding:12px}.question-card{padding:16px}.question-text{font-size:var(--font-size-base)}.question-navigator{padding:12px}.question-grid{grid-template-columns:repeat(4,1fr);gap:4px}.rules-header,.rules-content,.rules-footer{padding-left:14px;padding-right:14px}.results-header{padding:24px 16px}.results-header h1{font-size:22px}.results-icon{font-size:40px}.score-value{font-size:32px}}.retake-notice{border:1px solid var(--ledger-line, rgba(30, 42, 58, .14));border-left:3px solid #2f7d5d;border-radius:8px;background:#f2f8f4;padding:10px 14px;font-size:13px;line-height:1.5;color:var(--color-gray-4, #33404f);text-align:left}.retake-notice-blocked{border-left-color:#a4462f;background:#fdf4f1}.pre-exam-rules{display:flex;flex-direction:column;gap:18px;margin:4px 0 24px;text-align:left}.rules-block{border:1px solid var(--ledger-line, rgba(30, 42, 58, .14));border-radius:10px;padding:16px 18px;background:var(--ledger-card-lift, #FCFBF7)}.rules-block h3{margin:0 0 10px;font-size:.95rem;letter-spacing:.01em}.rules-instructions{border-left:3px solid var(--ledger-kraft, #CBA876);background:var(--ledger-kraft-tint, #F5EDE0)}.rules-instructions-text{margin:0;white-space:pre-wrap;line-height:1.6;font-size:.92rem}.rules-list{margin:0;display:flex;flex-direction:column;gap:8px}.rules-line{display:grid;grid-template-columns:140px 1fr;gap:12px;font-size:.9rem;line-height:1.5}.rules-line dt{color:var(--ledger-ink-soft, #5A6472);font-weight:500}.rules-line dd{margin:0}.rules-note{color:var(--ledger-ink-soft, #5A6472)}.rules-proctor{border-left:3px solid var(--ledger-red, #A5342A)}.rules-proctor-intro{margin:0 0 10px;font-size:.88rem;color:var(--ledger-ink-soft, #5A6472);line-height:1.55}.rules-measures{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:7px;font-size:.9rem;line-height:1.5}.rules-custom{margin:12px 0 0;white-space:pre-wrap;font-size:.9rem;line-height:1.55}.rules-warning{margin:12px 0 0;padding:10px 12px;border-radius:8px;background:#a5342a17;color:var(--ledger-red, #A5342A);font-size:.88rem;font-weight:500;line-height:1.5}@media (max-width: 560px){.rules-line{grid-template-columns:1fr;gap:2px}}