:root{--primary-900:#0f172a;--primary-800:#1e293b;--primary-700:#334155;--primary-600:#475569;--primary-500:#64748b;--accent-500:#f59e0b;--accent-400:#fbbf24;--accent-300:#fcd34d;--success-500:#10b981;--success-100:#d1fae5;--error-500:#ef4444;--error-100:#fee2e2;--gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;--gray-300:#cbd5e1;--gray-400:#94a3b8;--gray-500:#64748b;--gray-600:#475569;--gray-700:#334155;--gray-800:#1e293b;--gray-900:#0f172a;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;--shadow-xl:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a;--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-base:200ms cubic-bezier(0.4,0,0.2,1);--transition-slow:300ms cubic-bezier(0.4,0,0.2,1);--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:24px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f8fafc;background:var(--gray-50);color:#1e293b;color:var(--gray-800);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.6}.app-container{display:flex;min-height:100vh}.sidebar{background:linear-gradient(180deg,#0f172a,#1e293b);background:linear-gradient(180deg,var(--primary-900) 0,var(--primary-800) 100%);color:#fff;display:flex;flex-direction:column;height:100vh;overflow-x:hidden;overflow-y:auto;position:fixed;width:340px;z-index:1000}.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-track{background:#0000}.sidebar::-webkit-scrollbar-thumb{background:#fff3;border-radius:3px}.sidebar::-webkit-scrollbar-thumb:hover{background:#ffffff4d}.sidebar-header{background:#0003;border-bottom:1px solid #ffffff14;flex-shrink:0;padding:32px 28px}.sidebar-header h1{color:#fff;font-family:Playfair Display,serif;font-size:24px;font-weight:700;letter-spacing:-.5px;margin-bottom:6px}.sidebar-header p{color:#fbbf24;color:var(--accent-400);font-size:13px;font-weight:500;letter-spacing:1.5px;text-transform:uppercase}.chapter-list{flex:1 1;padding:16px 0}.chapter-item{border-bottom:1px solid #ffffff0f}.chapter-header{align-items:center;cursor:pointer;display:flex;gap:14px;padding:16px 24px;position:relative;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.chapter-header:before{background:#f59e0b;background:var(--accent-500);bottom:0;content:"";left:0;position:absolute;top:0;transform:scaleY(0);transition:transform .2s cubic-bezier(.4,0,.2,1);transition:transform var(--transition-base);width:3px}.chapter-header:hover{background:#ffffff0f}.chapter-header:hover:before{transform:scaleY(1)}.chapter-header.active{background:#ffffff1a}.chapter-header.active:before{transform:scaleY(1)}.chapter-number{align-items:center;background:#ffffff1a;border-radius:8px;display:flex;flex-shrink:0;font-size:14px;font-weight:600;height:32px;justify-content:center;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base);width:32px}.chapter-header.active .chapter-number,.chapter-header:hover .chapter-number{background:#f59e0b;background:var(--accent-500);color:#0f172a;color:var(--primary-900)}.chapter-title{color:#ffffffe6;flex:1 1;font-size:14px;font-weight:500;line-height:1.4}.chapter-toggle{font-size:12px;opacity:.5;transform:rotate(0deg);transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.chapter-toggle.expanded{opacity:.8;transform:rotate(180deg)}.section-list{background:#00000040;padding:8px 0}.section-item{color:#ffffffa6;cursor:pointer;font-size:13px;line-height:1.4;padding:12px 24px 12px 70px;position:relative}.section-item,.section-item:before{transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.section-item:before{background:#ffffff4d;border-radius:50%;content:"";height:6px;left:48px;position:absolute;top:50%;transform:translateY(-50%);width:6px}.section-item:hover{background:#ffffff0d;color:#ffffffe6}.section-item:hover:before{background:#fbbf24;background:var(--accent-400)}.section-item.active{background:#f59e0b26;color:#fbbf24;color:var(--accent-400);font-weight:500}.section-item.active:before{background:#fbbf24;background:var(--accent-400);box-shadow:0 0 8px #fbbf24;box-shadow:0 0 8px var(--accent-400)}.quiz-link{align-items:center;color:#fbbf24;color:var(--accent-400);cursor:pointer;display:flex;font-size:13px;font-weight:600;gap:8px;padding:14px 24px 14px 70px;position:relative;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.quiz-link:before{background:#fbbf24;background:var(--accent-400);border-radius:50%;content:"";height:6px;left:48px;position:absolute;top:50%;transform:translateY(-50%);width:6px}.quiz-link:hover{background:#f59e0b26;color:#fcd34d;color:var(--accent-300)}.main-content{display:flex;flex:1 1;flex-direction:column;margin-left:340px;min-height:100vh}.content-header{background:linear-gradient(135deg,#1e293b,#0f172a);background:linear-gradient(135deg,var(--primary-800) 0,var(--primary-900) 100%);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;box-shadow:var(--shadow-lg);color:#fff;padding:40px 48px;position:-webkit-sticky;position:sticky;top:0;z-index:100}.content-header h2{font-family:Playfair Display,serif;font-size:28px;font-weight:700;letter-spacing:-.5px;line-height:1.3;margin-bottom:4px}.breadcrumb{color:#fbbf24;color:var(--accent-400);font-size:13px;font-weight:500;letter-spacing:1px;text-transform:uppercase}.content-body{display:flex;flex:1 1;flex-direction:column;margin:0 auto;max-width:960px;min-height:0;overflow:hidden;padding:32px;width:100%}.welcome-screen{margin:0 auto;max-width:800px;padding:80px 40px;text-align:center}.welcome-icon{align-items:center;background:linear-gradient(135deg,#1e293b,#334155);background:linear-gradient(135deg,var(--primary-800) 0,var(--primary-700) 100%);border-radius:24px;border-radius:var(--radius-2xl);box-shadow:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a;box-shadow:var(--shadow-xl);display:flex;font-size:48px;height:100px;justify-content:center;margin:0 auto 32px;width:100px}.welcome-screen h2{color:#0f172a;color:var(--primary-900);font-family:Playfair Display,serif;font-size:42px;font-weight:700;letter-spacing:-1px;line-height:1.2;margin-bottom:16px}.welcome-screen>p{color:#475569;color:var(--gray-600);font-size:18px;line-height:1.8;margin-bottom:48px;margin-left:auto;margin-right:auto;max-width:600px}.welcome-stats{display:flex;gap:48px;justify-content:center;margin:48px 0 56px}.stat-item{background:#fff;border-radius:16px;border-radius:var(--radius-xl);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a;box-shadow:var(--shadow-md);min-width:140px;padding:24px 32px;text-align:center;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.stat-item:hover{box-shadow:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a;box-shadow:var(--shadow-xl);transform:translateY(-4px)}.stat-number{color:#1e293b;color:var(--primary-800);font-size:40px;font-weight:700;line-height:1;margin-bottom:8px}.stat-label{color:#64748b;color:var(--gray-500);font-size:13px;font-weight:600;letter-spacing:1px;text-transform:uppercase}.start-button{align-items:center;background:linear-gradient(135deg,#1e293b,#0f172a);background:linear-gradient(135deg,var(--primary-800) 0,var(--primary-900) 100%);border:none;border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a,0 0 0 0 #1e3a5f80;box-shadow:var(--shadow-lg),0 0 0 0 #1e3a5f80;color:#fff;cursor:pointer;display:inline-flex;font-size:16px;font-weight:600;gap:12px;padding:18px 48px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.start-button:hover{box-shadow:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a,0 0 0 4px #1e3a5f26;box-shadow:var(--shadow-xl),0 0 0 4px #1e3a5f26;transform:translateY(-2px)}.start-button:active{transform:translateY(0)}.section-content{background:#fff;border:1px solid #e2e8f0;border:1px solid var(--gray-200);border-radius:16px;border-radius:var(--radius-xl);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a;box-shadow:var(--shadow-md);padding:48px}.section-content h2{border-bottom:2px solid #e2e8f0;border-bottom:2px solid var(--gray-200);color:#0f172a;color:var(--primary-900);font-family:Playfair Display,serif;font-size:32px;font-weight:700;letter-spacing:-.5px;margin-bottom:32px;padding-bottom:16px}.section-content h3{color:#1e293b;color:var(--primary-800);font-size:22px;font-weight:700;margin:40px 0 16px}.section-content h4{color:#334155;color:var(--primary-700);font-size:18px;font-weight:600;margin:28px 0 12px}.section-content p{color:#334155;color:var(--gray-700);font-size:16px;line-height:1.8;margin:16px 0}.section-content ol,.section-content ul{line-height:1.9;margin:16px 0 16px 24px}.section-content li{color:#334155;color:var(--gray-700);margin:10px 0}.section-content strong{color:#1e293b;color:var(--primary-800);font-weight:600}.key-concept{background:linear-gradient(135deg,#eff6ff,#dbeafe);border-left:4px solid #3b82f6;border-radius:0 12px 12px 0;border-radius:0 var(--radius-lg) var(--radius-lg) 0;margin:32px 0;padding:24px 28px}.key-concept h3{align-items:center;color:#1e40af!important;display:flex;font-size:16px!important;gap:8px;margin:0 0 12px!important}.key-concept h3:before{align-items:center;background:#3b82f6;border-radius:50%;color:#fff;content:"!";display:inline-flex;font-size:14px;font-weight:700;height:24px;justify-content:center;width:24px}.key-concept p{color:#1e3a5f;margin:0}.key-concept ul{margin:12px 0 0 20px}.key-concept li{color:#1e3a5f;margin:8px 0}.definition{background:linear-gradient(135deg,#f8fafc,#f1f5f9);border:1px solid #e2e8f0;border:1px solid var(--gray-200);border-radius:12px;border-radius:var(--radius-lg);margin:24px 0;padding:24px 28px}.definition h4{color:#1e293b!important;color:var(--primary-800)!important;font-size:16px!important;font-weight:700;margin:0 0 8px!important}.definition p{color:#334155;color:var(--gray-700);margin:0}.example{background:linear-gradient(135deg,#fffbeb,#fef3c7);border-left:4px solid #f59e0b;border-left:4px solid var(--accent-500);border-radius:0 12px 12px 0;border-radius:0 var(--radius-lg) var(--radius-lg) 0;margin:32px 0;padding:24px 28px}.example h4{color:#92400e!important;font-size:16px!important;font-weight:700;margin:0 0 12px!important}.example li,.example ol,.example p{color:#78350f}.exam-tip{background:linear-gradient(135deg,#ecfdf5,#d1fae5);border-left:4px solid #10b981;border-left:4px solid var(--success-500);border-radius:0 12px 12px 0;border-radius:0 var(--radius-lg) var(--radius-lg) 0;margin:32px 0;padding:24px 28px}.exam-tip h3,.exam-tip h4{color:#065f46!important;font-size:16px!important;font-weight:700;margin:0 0 8px!important}.exam-tip p{color:#064e3b;margin:0}.important{background:linear-gradient(135deg,#fef2f2,#fee2e2);border-left:4px solid #ef4444;border-left:4px solid var(--error-500);border-radius:0 12px 12px 0;border-radius:0 var(--radius-lg) var(--radius-lg) 0;margin:32px 0;padding:24px 28px}.important h4{color:#991b1b!important;font-size:16px!important;font-weight:700;margin:0 0 8px!important}.important p{color:#7f1d1d;margin:0}table{background:#fff;border:1px solid #e2e8f0;border:1px solid var(--gray-200);border-collapse:collapse;border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 1px 2px 0 #0000000d;box-shadow:var(--shadow-sm);margin:28px 0;overflow:hidden;width:100%}th{background:#1e293b;background:var(--primary-800);color:#fff;font-size:14px;font-weight:600;letter-spacing:.5px;text-align:left;text-transform:uppercase}td,th{padding:16px 20px}td{border-bottom:1px solid #f1f5f9;border-bottom:1px solid var(--gray-100);color:#334155;color:var(--gray-700);font-size:15px}tr:last-child td{border-bottom:none}tr:hover td{background:#f8fafc;background:var(--gray-50)}.nav-buttons{border-top:1px solid #e2e8f0;border-top:1px solid var(--gray-200);display:flex;justify-content:space-between;margin-top:48px;padding-top:32px}.nav-btn{align-items:center;background:#fff;border:2px solid #1e293b;border:2px solid var(--primary-800);border-radius:12px;border-radius:var(--radius-lg);color:#1e293b;color:var(--primary-800);cursor:pointer;display:inline-flex;font-size:15px;font-weight:600;gap:10px;padding:14px 28px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.nav-btn:hover:not(:disabled){background:#1e293b;background:var(--primary-800);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a;box-shadow:var(--shadow-md);color:#fff;transform:translateY(-1px)}.nav-btn:disabled{cursor:not-allowed;opacity:.4}.quiz-container{display:flex;flex-direction:column;height:100%;margin:0 auto;max-width:720px}.quiz-header{flex-shrink:0;margin-bottom:24px;text-align:center}.quiz-header h3{color:#0f172a;color:var(--primary-900);font-family:Playfair Display,serif;font-size:24px;font-weight:700;letter-spacing:-.5px;margin-bottom:16px}.quiz-progress{align-items:center;display:flex;gap:20px;justify-content:center}.progress-bar{background:#e2e8f0;background:var(--gray-200);border-radius:4px;height:8px;overflow:hidden;width:280px}.progress-fill{background:linear-gradient(90deg,#334155,#1e293b);background:linear-gradient(90deg,var(--primary-700),var(--primary-800));border-radius:4px;height:100%;transition:width .3s cubic-bezier(.4,0,.2,1);transition:width var(--transition-slow)}.progress-text{color:#64748b;color:var(--gray-500);font-size:14px;font-weight:600;min-width:50px}.question-card{background:#fff;border:1px solid #e2e8f0;border:1px solid var(--gray-200);border-radius:16px;border-radius:var(--radius-xl);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;box-shadow:var(--shadow-lg);display:flex;flex:1 1;flex-direction:column;min-height:0;overflow:hidden;padding:32px}.question-number{background:#f1f5f9;background:var(--gray-100);border-radius:8px;border-radius:var(--radius-md);color:#64748b;color:var(--gray-500);display:inline-block;font-size:12px;font-weight:600;letter-spacing:1px;margin-bottom:16px;padding:6px 14px;text-transform:uppercase}.question-text{color:#0f172a;color:var(--primary-900);flex-shrink:0;font-size:18px;font-weight:500;line-height:1.5;margin-bottom:20px}.options-list{display:flex;flex:1 1;flex-direction:column;gap:10px;min-height:0;overflow-y:auto;padding-right:4px}.option-btn{align-items:flex-start;background:#f8fafc;background:var(--gray-50);border:2px solid #e2e8f0;border:2px solid var(--gray-200);border-radius:12px;border-radius:var(--radius-lg);color:#334155;color:var(--gray-700);cursor:pointer;display:flex;flex-shrink:0;font-size:14px;gap:12px;line-height:1.4;padding:14px 16px;text-align:left;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.option-btn:hover:not(:disabled){background:#fff;border-color:#334155;border-color:var(--primary-700);transform:translateX(4px)}.option-btn.selected{background:#1e3a5f0d;border-color:#1e293b;border-color:var(--primary-800);color:#0f172a;color:var(--primary-900)}.option-btn.correct{background:#d1fae5;background:var(--success-100);border-color:#10b981;border-color:var(--success-500);color:#065f46}.option-btn.incorrect{background:#fee2e2;background:var(--error-100);border-color:#ef4444;border-color:var(--error-500);color:#991b1b}.option-btn:disabled{cursor:default}.option-letter{align-items:center;background:#e2e8f0;background:var(--gray-200);border-radius:8px;border-radius:var(--radius-md);color:#475569;color:var(--gray-600);display:flex;flex-shrink:0;font-size:13px;font-weight:700;height:28px;justify-content:center;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base);width:28px}.option-btn.selected .option-letter{background:#1e293b;background:var(--primary-800);color:#fff}.option-btn.correct .option-letter{background:#10b981;background:var(--success-500);color:#fff}.option-btn.incorrect .option-letter{background:#ef4444;background:var(--error-500);color:#fff}.feedback-box{animation:slideUp .3s ease;border-radius:12px;border-radius:var(--radius-lg);flex-shrink:0;margin-top:16px;padding:16px}.feedback-box.correct{background:#d1fae5;background:var(--success-100);border:1px solid #10b981;border:1px solid var(--success-500)}.feedback-box.incorrect{background:#fee2e2;background:var(--error-100);border:1px solid #ef4444;border:1px solid var(--error-500)}.feedback-header{align-items:center;display:flex;font-size:15px;font-weight:700;gap:8px;margin-bottom:8px}.feedback-box.correct .feedback-header{color:#065f46}.feedback-box.incorrect .feedback-header{color:#991b1b}.feedback-explanation{font-size:14px;line-height:1.5}.feedback-box.correct .feedback-explanation{color:#064e3b}.feedback-box.incorrect .feedback-explanation{color:#7f1d1d}.quiz-buttons{display:flex;flex-shrink:0;gap:12px;justify-content:center;margin-top:20px}.quiz-btn{border-radius:12px;border-radius:var(--radius-lg);cursor:pointer;font-size:14px;font-weight:600;padding:14px 32px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.submit-btn{background:linear-gradient(135deg,#334155,#0f172a);background:linear-gradient(135deg,var(--primary-700) 0,var(--primary-900) 100%);border:none;color:#fff;min-width:200px}.submit-btn:hover:not(:disabled){box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;box-shadow:var(--shadow-lg);transform:translateY(-2px)}.submit-btn:disabled{cursor:not-allowed;opacity:.4}.next-btn{background:#fff;border:2px solid #1e293b;border:2px solid var(--primary-800);color:#1e293b;color:var(--primary-800);min-width:200px}.next-btn:hover{background:#1e293b;background:var(--primary-800);color:#fff;transform:translateY(-2px)}.quiz-results{background:#fff;border:1px solid #e2e8f0;border:1px solid var(--gray-200);border-radius:16px;border-radius:var(--radius-xl);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;box-shadow:var(--shadow-lg);padding:56px 48px;text-align:center}.results-icon{font-size:72px;line-height:1;margin-bottom:24px}.results-title{font-family:Playfair Display,serif;font-size:32px;font-weight:700;letter-spacing:-.5px;margin-bottom:8px}.results-title.passed{color:#10b981;color:var(--success-500)}.results-title.failed{color:#ef4444;color:var(--error-500)}.results-score{font-size:64px;font-weight:700;line-height:1;margin:24px 0}.results-score.passed{color:#10b981;color:var(--success-500)}.results-score.failed{color:#ef4444;color:var(--error-500)}.results-message{color:#475569;color:var(--gray-600);font-size:18px;line-height:1.7;margin-bottom:40px;margin-left:auto;margin-right:auto;max-width:400px}.results-buttons{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}.results-btn{border-radius:12px;border-radius:var(--radius-lg);cursor:pointer;font-size:15px;font-weight:600;padding:16px 36px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.retry-btn{background:#fff;border:2px solid #1e293b;border:2px solid var(--primary-800);color:#1e293b;color:var(--primary-800)}.retry-btn:hover{background:#1e293b;background:var(--primary-800);color:#fff;transform:translateY(-2px)}.continue-btn{background:linear-gradient(135deg,#334155,#0f172a);background:linear-gradient(135deg,var(--primary-700) 0,var(--primary-900) 100%);border:none;color:#fff}.continue-btn:hover{box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;box-shadow:var(--shadow-lg);transform:translateY(-2px)}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media (max-width:1100px){.sidebar{width:300px}.main-content{margin-left:300px}.content-body{padding:32px}.section-content{padding:36px}}@media (max-width:900px){.sidebar{width:280px}.main-content{margin-left:280px}.content-header{padding:28px 32px}.content-header h2{font-size:24px}.welcome-screen h2{font-size:32px}.welcome-stats{gap:24px}}@media (max-width:768px){.app-container{flex-direction:column}.sidebar{border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--gray-200);height:auto;max-height:40vh;position:relative;width:100%}.main-content{margin-left:0}.content-header{padding:24px;position:relative}.content-header h2{font-size:22px}.content-body{padding:16px}.section-content{border-radius:12px;border-radius:var(--radius-lg);padding:28px}.section-content h2{font-size:26px}.welcome-screen{padding:40px 20px}.welcome-screen h2{font-size:28px}.welcome-stats{flex-direction:column;gap:16px}.stat-item{padding:20px}.quiz-header{margin-bottom:16px}.quiz-header h3{font-size:20px;margin-bottom:12px}.quiz-progress{gap:12px}.progress-bar{width:180px}.question-card{padding:20px}.question-number{font-size:11px;margin-bottom:10px;padding:4px 10px}.question-text{font-size:16px;margin-bottom:16px}.options-list{gap:8px}.option-btn{font-size:13px;gap:10px;padding:12px}.option-letter{font-size:12px;height:24px;width:24px}.feedback-box{margin-top:12px;padding:12px}.feedback-header{font-size:14px;margin-bottom:6px}.feedback-explanation{font-size:13px}.quiz-buttons{margin-top:16px}.quiz-btn{padding:12px 24px;width:100%}.nav-buttons{flex-direction:column;gap:12px}.nav-btn{justify-content:center}.results-buttons{flex-direction:column}.results-btn{width:100%}}@media print{.sidebar{display:none}.main-content{margin-left:0}.content-header{background:none;border-bottom:2px solid #cbd5e1;border-bottom:2px solid var(--gray-300);box-shadow:none;color:#000;position:relative}.content-header h2{color:#000}.breadcrumb{color:#475569;color:var(--gray-600)}.nav-buttons,.quiz-buttons,.results-buttons{display:none}.section-content{border:1px solid #cbd5e1;border:1px solid var(--gray-300);box-shadow:none}}.login-container{align-items:center;background:linear-gradient(135deg,#0f172a,#1e293b 50%,#334155);background:linear-gradient(135deg,var(--primary-900) 0,var(--primary-800) 50%,var(--primary-700) 100%);display:flex;justify-content:center;min-height:100vh;padding:24px}.login-card{background:#fff;border-radius:16px;border-radius:var(--radius-xl);box-shadow:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a,0 0 60px #0000004d;box-shadow:var(--shadow-xl),0 0 60px #0000004d;max-width:440px;overflow:hidden;width:100%}.login-header{background:linear-gradient(135deg,#f8fafc,#fff);background:linear-gradient(135deg,var(--gray-50) 0,#fff 100%);border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--gray-200);padding:48px 40px 32px;text-align:center}.login-icon{align-items:center;background:linear-gradient(135deg,#1e293b,#0f172a);background:linear-gradient(135deg,var(--primary-800) 0,var(--primary-900) 100%);border-radius:16px;border-radius:var(--radius-xl);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;box-shadow:var(--shadow-lg);color:#fff;display:flex;height:72px;justify-content:center;margin:0 auto 20px;width:72px}.login-header h1{color:#0f172a;color:var(--primary-900);font-family:Playfair Display,serif;font-size:28px;font-weight:700;letter-spacing:-.5px;margin-bottom:6px}.login-header p{color:#f59e0b;color:var(--accent-500);font-size:14px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase}.login-tabs{border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--gray-200);display:flex}.login-tab{background:#f8fafc;background:var(--gray-50);border:none;color:#64748b;color:var(--gray-500);cursor:pointer;flex:1 1;font-size:14px;font-weight:600;padding:16px 24px;position:relative;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.login-tab:hover{background:#f1f5f9;background:var(--gray-100);color:#334155;color:var(--gray-700)}.login-tab.active{background:#fff;color:#1e293b;color:var(--primary-800)}.login-tab.active:after{background:#1e293b;background:var(--primary-800);bottom:-1px;content:"";height:2px;left:0;position:absolute;right:0}.login-form{padding:32px 40px 40px}.form-group{margin-bottom:24px}.form-group label{color:#334155;color:var(--gray-700);display:block;font-size:13px;font-weight:600;letter-spacing:.5px;margin-bottom:8px;text-transform:uppercase}.form-group input{background:#f8fafc;background:var(--gray-50);border:2px solid #e2e8f0;border:2px solid var(--gray-200);border-radius:8px;border-radius:var(--radius-md);font-size:15px;padding:14px 16px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base);width:100%}.form-group input:focus{background:#fff;border-color:#334155;border-color:var(--primary-700);box-shadow:0 0 0 4px #1e3a5f1a;outline:none}.form-group input::placeholder{color:#94a3b8;color:var(--gray-400)}.login-error{align-items:center;background:#fee2e2;background:var(--error-100);border:1px solid #ef4444;border:1px solid var(--error-500);border-radius:8px;border-radius:var(--radius-md);color:#991b1b;display:flex;font-size:14px;gap:10px;margin-bottom:20px;padding:14px 16px}.login-error:before{align-items:center;background:#ef4444;background:var(--error-500);border-radius:50%;color:#fff;content:"!";display:flex;flex-shrink:0;font-size:12px;font-weight:700;height:20px;justify-content:center;width:20px}.login-message{align-items:center;background:#d1fae5;background:var(--success-100);border:1px solid #10b981;border:1px solid var(--success-500);border-radius:8px;border-radius:var(--radius-md);color:#065f46;display:flex;font-size:14px;gap:10px;margin-bottom:20px;padding:14px 16px}.login-message:before{background:#10b981;background:var(--success-500);border-radius:50%;content:"✓";flex-shrink:0;font-size:12px;font-weight:700;height:20px;width:20px}.login-button,.login-message:before{align-items:center;color:#fff;display:flex;justify-content:center}.login-button{background:linear-gradient(135deg,#334155,#0f172a);background:linear-gradient(135deg,var(--primary-700) 0,var(--primary-900) 100%);border:none;border-radius:8px;border-radius:var(--radius-md);cursor:pointer;font-size:15px;font-weight:600;gap:10px;padding:16px 24px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base);width:100%}.login-button:hover:not(:disabled){box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;box-shadow:var(--shadow-lg);transform:translateY(-2px)}.login-button:disabled{cursor:not-allowed;opacity:.7}.login-footer{background:#f8fafc;background:var(--gray-50);border-top:1px solid #e2e8f0;border-top:1px solid var(--gray-200);padding:24px 40px;text-align:center}.login-footer p{color:#475569;color:var(--gray-600);font-size:14px}.link-button{background:none;border:none;color:#334155;color:var(--primary-700);cursor:pointer;font-size:14px;font-weight:600;text-decoration:underline;transition:color .2s cubic-bezier(.4,0,.2,1);transition:color var(--transition-base)}.link-button:hover{color:#0f172a;color:var(--primary-900)}.loading-spinner{animation:spin .8s linear infinite;border:2px solid #ffffff4d;border-radius:50%;border-top-color:#fff;height:20px;width:20px}@keyframes spin{to{transform:rotate(1turn)}}.loading-screen{align-items:center;background:linear-gradient(135deg,#0f172a,#1e293b);background:linear-gradient(135deg,var(--primary-900) 0,var(--primary-800) 100%);color:#fff;display:flex;flex-direction:column;gap:24px;justify-content:center;min-height:100vh}.loading-screen .loading-spinner{border-width:3px;height:48px;width:48px}.loading-screen p{color:#fffc;font-size:16px}.progress-tracker{background:#00000026;border-bottom:1px solid #ffffff14;padding:20px 24px}.progress-tracker-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:16px}.progress-email{color:#ffffffb3;flex:1 1;font-size:13px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.progress-tracker-header .logout-btn{margin-left:12px;padding:6px 10px}.progress-stats-row{align-items:center;display:flex;justify-content:space-between;margin-bottom:8px}.progress-label{color:#ffffffb3;font-size:12px;font-weight:600;letter-spacing:1px;text-transform:uppercase}.progress-percentage{color:#fbbf24;color:var(--accent-400);font-size:14px;font-weight:700}.progress-tracker-bar{background:#ffffff26;border-radius:3px;height:6px;overflow:hidden}.progress-tracker-fill{background:linear-gradient(90deg,#f59e0b,#fbbf24);background:linear-gradient(90deg,var(--accent-500),var(--accent-400));border-radius:3px;height:100%;transition:width .3s cubic-bezier(.4,0,.2,1);transition:width var(--transition-slow)}.progress-tracker-stats{color:#ffffff80;font-size:12px;margin-top:10px}.logout-btn{background:#ffffff1a;border:1px solid #fff3;border-radius:8px;border-radius:var(--radius-md);color:#fffc;cursor:pointer;flex-shrink:0;font-size:12px;font-weight:600;padding:8px 14px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.logout-btn:hover{background:#fff3;color:#fff}.section-complete-container{border-top:1px solid #e2e8f0;border-top:1px solid var(--gray-200);display:flex;justify-content:center;margin-top:48px;padding-top:32px}.section-complete-checkbox{align-items:center;background:#f8fafc;background:var(--gray-50);border:2px solid #e2e8f0;border:2px solid var(--gray-200);border-radius:12px;border-radius:var(--radius-lg);cursor:pointer;display:flex;gap:12px;padding:16px 28px;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base)}.section-complete-checkbox:hover{background:#fff;border-color:#10b981;border-color:var(--success-500)}.section-complete-checkbox.completed{background:#d1fae5;background:var(--success-100);border-color:#10b981;border-color:var(--success-500)}.checkbox-indicator{align-items:center;background:#fff;border:2px solid #cbd5e1;border:2px solid var(--gray-300);border-radius:6px;display:flex;height:24px;justify-content:center;transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base);width:24px}.section-complete-checkbox:hover .checkbox-indicator{border-color:#10b981;border-color:var(--success-500)}.section-complete-checkbox.completed .checkbox-indicator{background:#10b981;background:var(--success-500);border-color:#10b981;border-color:var(--success-500);color:#fff}.checkbox-indicator svg{height:14px;opacity:0;transform:scale(.5);transition:all .2s cubic-bezier(.4,0,.2,1);transition:all var(--transition-base);width:14px}.section-complete-checkbox.completed .checkbox-indicator svg{opacity:1;transform:scale(1)}.checkbox-label{color:#334155;color:var(--gray-700);font-size:15px;font-weight:600;transition:color .2s cubic-bezier(.4,0,.2,1);transition:color var(--transition-base)}.section-complete-checkbox.completed .checkbox-label{color:#065f46}.chapter-number.completed{background:#10b981!important;background:var(--success-500)!important;color:#fff!important}.section-item.completed{color:#ffffff80}.section-item.completed:before{background:#10b981;background:var(--success-500)}.section-item.completed:after{color:#10b981;color:var(--success-500);content:"✓";font-size:12px;position:absolute;right:16px;top:50%;transform:translateY(-50%)}@media (max-width:480px){.login-card{border-radius:12px;border-radius:var(--radius-lg)}.login-header{padding:36px 24px 24px}.login-header h1{font-size:24px}.login-form{padding:24px}.login-footer{padding:20px 24px}.user-menu{gap:12px;padding:12px 16px}.user-avatar{font-size:14px;height:36px;width:36px}.logout-btn{padding:6px 10px}.section-complete-checkbox{gap:10px;padding:14px 20px}.checkbox-label{font-size:14px}}
/*# sourceMappingURL=main.783e32ff.css.map*/