:root{--bg-primary:#0f0f1a;--bg-secondary:#161625;--bg-card:#1c1c2e;--bg-card-hover:#22223a;--bg-sidebar:#12121f;--bg-glass:#1e1e32b3;--text-primary:#e8e8f0;--text-secondary:#9d9db8;--text-muted:#6b6b85;--text-heading:#fff;--accent:#6366f1;--accent-light:#818cf8;--accent-dark:#4f46e5;--accent-glow:#6366f140;--success:#22c55e;--success-bg:#22c55e1f;--error:#ef4444;--error-bg:#ef44441f;--warning:#f59e0b;--warning-bg:#f59e0b1f;--gold:#d69e2e;--border:#ffffff0f;--border-accent:#6366f14d;--font-body:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-heading:"Outfit", "Inter", sans-serif;--sidebar-width:300px;--header-height:64px;--radius:12px;--radius-sm:8px;--radius-lg:16px;--transition:.2s cubic-bezier(.4, 0, .2, 1);--transition-slow:.4s cubic-bezier(.4, 0, .2, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;height:100vh;line-height:1.7;overflow:hidden}#app{height:100vh;display:flex;overflow:hidden}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--bg-sidebar);border-right:1px solid var(--border);z-index:10;flex-direction:column;height:100vh;display:flex;overflow:hidden}.sidebar-header{border-bottom:1px solid var(--border);padding:24px 20px 16px}.sidebar-logo{align-items:center;gap:12px;margin-bottom:16px;display:flex}.sidebar-logo-icon{background:linear-gradient(135deg, var(--accent), #8b5cf6);border-radius:var(--radius-sm);width:40px;height:40px;font-family:var(--font-heading);color:#fff;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;font-weight:800;display:flex}.sidebar-logo-text{font-family:var(--font-heading);color:var(--text-heading);font-size:15px;font-weight:600;line-height:1.3}.sidebar-logo-sub{color:var(--text-muted);font-size:11px;font-weight:400}.global-progress{margin-bottom:4px;padding:0 20px}.global-progress-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;justify-content:space-between;margin-bottom:6px;font-size:11px;font-weight:500;display:flex}.global-progress-bar{background:var(--border);border-radius:2px;height:4px;overflow:hidden}.global-progress-fill{background:linear-gradient(90deg, var(--accent), #8b5cf6);height:100%;transition:width var(--transition-slow);border-radius:2px;min-width:0}.module-list{flex:1;padding:12px 10px;overflow-y:auto}.module-item{border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);align-items:center;gap:12px;margin-bottom:2px;padding:10px 12px;display:flex;position:relative}.module-item:hover{background:var(--bg-card)}.module-item.active{background:var(--accent-glow)}.module-item.active .module-item-title{color:var(--accent-light)}.module-item-number{border:2px solid var(--border);width:32px;height:32px;color:var(--text-muted);transition:all var(--transition);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:600;display:flex}.module-item.active .module-item-number{border-color:var(--accent);color:var(--accent-light);background:var(--accent-glow)}.module-item.completed .module-item-number{border-color:var(--success);background:var(--success-bg);color:var(--success)}.module-item.completed .module-item-number:after{content:"✓";font-size:14px}.module-item.completed .module-item-number span{display:none}.module-item-info{flex:1;min-width:0}.module-item-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:500;line-height:1.3;overflow:hidden}.module-item-duration{color:var(--text-muted);font-size:11px}.module-item.completed .module-item-title{color:var(--success)}.sidebar-footer{border-top:1px solid var(--border);padding:16px 20px}.session-timer{color:var(--text-muted);align-items:center;gap:8px;font-size:12px;display:flex}.session-timer-icon{background:var(--success);border-radius:50%;width:8px;height:8px;animation:2s ease-in-out infinite pulse-dot}@keyframes pulse-dot{0%,to{opacity:1}50%{opacity:.4}}.main-content{flex-direction:column;flex:1;display:flex;overflow:hidden}.content-header{height:var(--header-height);border-bottom:1px solid var(--border);background:var(--bg-secondary);flex-shrink:0;justify-content:space-between;align-items:center;padding:0 32px;display:flex}.content-header-title{font-family:var(--font-heading);color:var(--text-heading);font-size:18px;font-weight:600}.content-header-actions{align-items:center;gap:12px;display:flex}.content-scroll{flex:1;padding:32px;overflow-y:auto}.module-content{max-width:820px;margin:0 auto}.module-badge{background:var(--accent-glow);border:1px solid var(--border-accent);color:var(--accent-light);border-radius:20px;align-items:center;gap:6px;margin-bottom:16px;padding:4px 12px;font-size:12px;font-weight:500;display:inline-flex}.module-title{font-family:var(--font-heading);color:var(--text-heading);margin-bottom:8px;font-size:32px;font-weight:700;line-height:1.2}.module-subtitle{color:var(--text-secondary);margin-bottom:32px;font-size:16px;line-height:1.6}.section{margin-bottom:40px}.section-title{font-family:var(--font-heading);color:var(--text-heading);align-items:center;gap:10px;margin-bottom:16px;font-size:20px;font-weight:600;display:flex}.section-title:before{content:"";background:linear-gradient(180deg, var(--accent), #8b5cf6);border-radius:2px;width:4px;height:20px}.section-body{color:var(--text-primary);line-height:1.8}.section-body p{margin-bottom:14px}.section-body ul,.section-body ol{margin:12px 0;padding-left:24px}.section-body li{color:var(--text-primary);margin-bottom:8px}.section-body li::marker{color:var(--accent-light)}.section-body strong{color:var(--text-heading);font-weight:600}.section-body code{background:var(--bg-card);color:var(--accent-light);border-radius:4px;padding:2px 8px;font-size:14px}.info-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin:16px 0;padding:20px 24px}.info-card.tip{border-left:3px solid var(--accent)}.info-card.warning{border-left:3px solid var(--warning)}.info-card.important{border-left:3px solid var(--gold)}.info-card-title{color:var(--text-heading);align-items:center;gap:8px;margin-bottom:8px;font-size:14px;font-weight:600;display:flex}.info-card-body{color:var(--text-secondary);font-size:14px;line-height:1.7}.content-table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px}.content-table th{background:var(--bg-card);text-align:left;color:var(--text-heading);border-bottom:2px solid var(--border-accent);text-transform:uppercase;letter-spacing:.3px;padding:12px 16px;font-size:13px;font-weight:600}.content-table td{border-bottom:1px solid var(--border);color:var(--text-primary);padding:10px 16px}.content-table tr:hover td{background:var(--bg-card)}.exercise-block{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin:24px 0;padding:24px;position:relative;overflow:hidden}.exercise-block:before{content:"";background:linear-gradient(90deg, var(--accent), #8b5cf6, var(--accent-light));height:3px;position:absolute;top:0;left:0;right:0}.exercise-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.exercise-tag{background:var(--accent-glow);color:var(--accent-light);text-transform:uppercase;letter-spacing:.5px;border-radius:20px;align-items:center;gap:6px;padding:4px 10px;font-size:12px;font-weight:600;display:inline-flex}.exercise-counter{color:var(--text-muted);font-size:13px}.exercise-question{color:var(--text-heading);margin-bottom:20px;font-size:16px;font-weight:500;line-height:1.5}.quiz-options{flex-direction:column;gap:10px;display:flex}.quiz-option{border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);text-align:left;width:100%;font-family:var(--font-body);color:var(--text-primary);background:0 0;align-items:center;gap:14px;padding:14px 18px;font-size:14px;display:flex}.quiz-option:hover:not(.disabled){border-color:var(--accent);background:var(--accent-glow)}.quiz-option .option-letter{border:2px solid var(--border);width:28px;height:28px;transition:all var(--transition);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:600;display:flex}.quiz-option:hover:not(.disabled) .option-letter{border-color:var(--accent);color:var(--accent-light)}.quiz-option.correct{border-color:var(--success);background:var(--success-bg)}.quiz-option.correct .option-letter{border-color:var(--success);background:var(--success);color:#fff}.quiz-option.incorrect{border-color:var(--error);background:var(--error-bg)}.quiz-option.incorrect .option-letter{border-color:var(--error);background:var(--error);color:#fff}.quiz-option.disabled{cursor:default;opacity:.7}.quiz-option.disabled.correct{opacity:1}.exercise-explanation{border-radius:var(--radius-sm);margin-top:16px;padding:16px;font-size:14px;line-height:1.6;animation:.3s fadeSlideIn}.exercise-explanation.correct{background:var(--success-bg);color:#86efac;border:1px solid #22c55e33}.exercise-explanation.incorrect{background:var(--error-bg);color:#fca5a5;border:1px solid #ef444433}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.btn{border-radius:var(--radius-sm);font-family:var(--font-body);cursor:pointer;transition:all var(--transition);border:none;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:500;text-decoration:none;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent), var(--accent-dark));color:#fff;box-shadow:0 4px 15px var(--accent-glow)}.btn-primary:hover{box-shadow:0 6px 20px var(--accent-glow);transform:translateY(-1px)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--text-muted)}.btn-success{background:linear-gradient(135deg, var(--success), #16a34a);color:#fff}.module-nav{border-top:1px solid var(--border);justify-content:space-between;align-items:center;margin-top:48px;padding-top:24px;display:flex}.landing{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:70vh;padding:40px;display:flex}.landing-icon{background:linear-gradient(135deg, var(--accent), #8b5cf6);width:80px;height:80px;box-shadow:0 8px 32px var(--accent-glow);border-radius:20px;justify-content:center;align-items:center;margin-bottom:24px;font-size:36px;display:flex}.landing h1{font-family:var(--font-heading);color:var(--text-heading);margin-bottom:12px;font-size:36px;font-weight:700}.landing p{color:var(--text-secondary);max-width:500px;margin-bottom:32px;font-size:16px;line-height:1.7}.landing-stats{gap:32px;margin-bottom:40px;display:flex}.landing-stat{text-align:center}.landing-stat-value{font-family:var(--font-heading);color:var(--accent-light);font-size:28px;font-weight:700}.landing-stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-size:12px}.btn-reset{border:1px solid var(--border);color:var(--text-muted);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);background:0 0;padding:6px 12px;font-size:12px}.btn-reset:hover{border-color:var(--error);color:var(--error)}.interview-scenario{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin:16px 0;padding:24px}.interview-scenario-header{align-items:center;gap:12px;margin-bottom:16px;display:flex}.interview-avatar{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:18px;display:flex}.interviewer{background:linear-gradient(135deg,#1e3a5f,#2563eb)}.candidate{background:linear-gradient(135deg, var(--accent), #8b5cf6)}.interview-speaker{color:var(--text-heading);font-size:14px;font-weight:600}.interview-role{color:var(--text-muted);font-size:12px}.interview-text{color:var(--text-primary);padding-left:52px;font-size:15px;line-height:1.7}.reveal-toggle{background:var(--bg-card);border:1px dashed var(--border-accent);border-radius:var(--radius-sm);cursor:pointer;font-family:var(--font-body);color:var(--accent-light);transition:all var(--transition);align-items:center;gap:8px;width:100%;margin:12px 0;padding:10px 16px;font-size:14px;display:flex}.reveal-toggle:hover{background:var(--accent-glow)}.reveal-content{background:var(--bg-card);border-radius:var(--radius-sm);margin-top:8px;padding:16px;animation:.3s fadeSlideIn;display:none}.reveal-content.visible{display:block}.checklist{padding:0;list-style:none}.checklist li{color:var(--text-primary);align-items:flex-start;gap:10px;padding:8px 0;font-size:14px;display:flex}.checklist li:before{content:"☐";color:var(--accent-light);flex-shrink:0;font-size:16px}.login-screen{background:radial-gradient(circle at top right, #6366f126, transparent), var(--bg-primary);justify-content:center;align-items:center;width:100vw;height:100vh;padding:20px;display:flex}.login-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:420px;padding:40px 32px;position:relative;box-shadow:0 10px 30px #0000004d}.login-card:before{content:"";background:linear-gradient(90deg, var(--accent), #8b5cf6);border-radius:var(--radius-lg) var(--radius-lg) 0 0;height:4px;position:absolute;top:0;left:0;right:0}.login-logo{text-align:center;flex-direction:column;align-items:center;margin-bottom:32px;display:flex}.login-logo-icon{background:linear-gradient(135deg, var(--accent), #8b5cf6);border-radius:var(--radius);width:54px;height:54px;font-family:var(--font-heading);color:#fff;box-shadow:0 8px 20px var(--accent-glow);justify-content:center;align-items:center;margin-bottom:16px;font-size:22px;font-weight:800;display:flex}.login-logo h2{font-family:var(--font-heading);color:var(--text-heading);margin-bottom:6px;font-size:22px;font-weight:700}.login-logo p{color:var(--text-muted);font-size:13px}.form-group{margin-bottom:20px}.form-group label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;font-size:12px;font-weight:500;display:block}.login-input{background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;color:var(--text-primary);font-family:var(--font-body);transition:all var(--transition);padding:12px 16px;font-size:14px}.login-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.login-message{border-radius:var(--radius-sm);margin-bottom:20px;padding:12px 16px;font-size:13px;line-height:1.5;display:none}.login-message.error{background:var(--error-bg);color:#fca5a5;border:1px solid #ef444433;display:block}.login-message.success{background:var(--success-bg);color:#86efac;border:1px solid #22c55e33;display:block}.login-footer{text-align:center;margin-top:24px}.login-footer a{color:var(--accent-light);cursor:pointer;font-size:13px;text-decoration:none}.login-footer a:hover{text-decoration:underline}@media (width<=1024px){:root{--sidebar-width:260px}.content-header{padding:0 24px}.content-scroll{padding:24px}}@media (width<=768px){#app{flex-direction:column}.sidebar{border-right:none;border-bottom:1px solid var(--border);width:100%;min-width:100%;height:auto;max-height:45vh}.sidebar-header{padding:16px 20px}.sidebar-logo{margin-bottom:8px}.global-progress{margin-bottom:0}.module-list{white-space:nowrap;gap:8px;padding:8px 16px;display:flex;overflow:auto hidden}.module-item{flex-shrink:0;margin-bottom:0;padding:8px 12px}.module-item-title{max-width:140px}.sidebar-footer{display:none}.main-content{flex:1;height:55vh}.content-header{height:52px;padding:0 16px}.content-header-title{font-size:15px}.content-scroll{padding:16px}.landing{min-height:50vh;padding:16px}.landing-stats{gap:16px;margin-bottom:24px}.landing-stat-value{font-size:22px}}