:root{--primary: #663ffe;--primary-light: #ede8ff;--secondary: #12bcdb;--secondary-light: #e0f7fb;--navy: #1a2744;--navy-mid: #243460;--success: #4caf50;--success-bg: #e8f5e9;--warning: #ff9800;--warning-bg: #fff3e0;--error: #f44336;--error-bg: #fdecea;--info: #2196f3;--info-bg: #e3f2fd;--surface: #f5f5f5;--surface-card: #ffffff;--border: rgba(0, 0, 0, .12);--text: #000000;--text-muted: #666666;--text-hint: #9e9e9e;--radius: 8px;--radius-sm: 4px;--shadow: 0 2px 8px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12)}@font-face{font-family:Futura LT;src:url(/fonts/FuturaLT.woff2) format("woff2"),url(/fonts/FuturaLT.woff) format("woff");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Futura LT;src:url(/fonts/FuturaLT-Bold.woff2) format("woff2"),url(/fonts/FuturaLT-Bold.woff) format("woff");font-weight:700;font-style:normal;font-display:swap}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Futura LT,sans-serif;background:var(--surface);color:var(--text);min-height:100vh}.btn{font-family:Futura LT,sans-serif;font-size:12px;font-weight:700;letter-spacing:.04em;padding:9px 18px;border-radius:var(--radius-sm);border:none;cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:6px;text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#5535db}.btn-primary:disabled{opacity:.4;cursor:not-allowed}.btn-secondary{background:var(--secondary);color:#fff}.btn-secondary:hover{background:#0ea3be}.btn-ghost{background:transparent;border:1.5px solid var(--border);color:var(--text-muted)}.btn-ghost:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}.btn-danger{background:var(--error-bg);color:var(--error);border:1px solid rgba(244,67,54,.2)}.btn-danger:hover{background:var(--error);color:#fff}.card{background:var(--surface-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.75rem 2rem}.input{width:100%;padding:11px 14px;border-radius:var(--radius-sm);border:1.5px solid var(--border);font-size:15px;font-family:Futura LT,sans-serif;color:var(--text);outline:none;transition:border-color .15s}.input:focus{border-color:var(--primary)}.callout{border-radius:var(--radius-sm);padding:.75rem 1rem;font-size:13px;line-height:1.6;margin-bottom:1rem}.callout-info{background:var(--info-bg);border-left:3px solid var(--info);color:#0d47a1}.callout-warning{background:var(--warning-bg);border-left:3px solid var(--warning);color:#e65100}.callout-success{background:var(--success-bg);border-left:3px solid var(--success);color:#1b5e20}.callout-error{background:var(--error-bg);border-left:3px solid var(--error);color:#b71c1c}.page{min-height:100vh;display:flex;flex-direction:column}.content{max-width:1100px;margin:0 auto;padding:2rem;width:100%}.page-title{font-size:24px;font-weight:700;margin-bottom:1.5rem}.loading{text-align:center;padding:4rem;color:var(--text-muted)}.empty-state{text-align:center;padding:4rem;color:var(--text-hint)}.mono{font-family:monospace;font-size:13px}.header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(255,255,255,.08)}.header-inner{max-width:1100px;margin:0 auto;padding:0 2rem;display:flex;align-items:center;gap:1.5rem;height:60px}.logo-link{text-decoration:none}.logo-wrap{display:flex;align-items:center;gap:10px;flex-shrink:0}.logo-img{height:32px;width:32px;object-fit:contain}.logo{font-family:Futura LT,sans-serif;font-weight:700;font-size:15px;color:#fff}.logo span{color:var(--secondary)}.header-sub{font-size:12px;color:#fff6}.header-actions{display:flex;align-items:center;gap:.75rem;margin-left:auto}.header-progress{flex:1;height:4px;background:#ffffff1f;border-radius:2px;overflow:hidden}.progress-bar-wrap{height:4px;background:#1a274414;border-radius:2px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:2px;transition:width .5s ease}.locale-select{background:#ffffff1a;border:1px solid rgba(255,255,255,.15);color:#fff;border-radius:4px;padding:4px 8px;font-family:Futura LT,sans-serif;font-size:12px;cursor:pointer;transition:all .15s;-webkit-appearance:auto;-moz-appearance:auto;appearance:auto}.locale-select:hover{background:#ffffff2e}.locale-select option{color:#000;background:#fff}.logout-btn{background:#ffffff14;border:1px solid rgba(255,255,255,.15);color:#fff9;border-radius:4px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;font-size:14px;cursor:pointer;transition:all .15s}.logout-btn:hover{background:#f4433633;color:#f44336;border-color:#f443364d}.user-badge{display:flex;align-items:center;gap:8px;background:#ffffff1a;border-radius:20px;padding:4px 12px 4px 4px;font-size:13px;color:#fff;cursor:pointer;border:1px solid rgba(255,255,255,.15);transition:background .15s;text-decoration:none}.user-badge:hover{background:#ffffff2e}.user-initial{width:24px;height:24px;border-radius:50%;background:var(--primary);color:#fff;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;font-family:Futura LT,sans-serif}.user-name{font-size:12px}.login-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--navy);display:flex;align-items:center;justify-content:center;z-index:200}.login-box{background:#fff;border-radius:var(--radius);padding:2.5rem 3rem;width:100%;max-width:420px;text-align:center;box-shadow:var(--shadow-lg)}.login-locale{position:absolute;top:1.5rem;right:1.5rem}.login-logo{height:72px;object-fit:contain;margin-bottom:1.25rem}.login-box h2{font-size:22px;font-weight:700;color:var(--navy);margin-bottom:.5rem}.login-subtitle{font-size:14px;color:var(--text-muted);margin-bottom:1.75rem;line-height:1.6}.login-error{color:var(--error);font-size:13px;margin:.75rem 0;min-height:18px}.login-btn{width:100%;justify-content:center;padding:11px;font-size:13px}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.25rem}.course-card{text-decoration:none;color:var(--text);display:flex;flex-direction:column;gap:.75rem;transition:box-shadow .15s,border-color .15s}.course-card:hover{border-color:var(--primary);box-shadow:var(--shadow)}.course-card-title{font-size:16px;font-weight:700}.course-card-desc{font-size:13px;color:var(--text-muted);line-height:1.5;flex:1}.course-card-progress{display:flex;align-items:center;gap:1rem}.course-card-progress .progress-bar-wrap{flex:1}.progress-label{font-size:12px;color:var(--text-hint);flex-shrink:0}.course-card-status{font-family:Futura LT,sans-serif;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-hint)}.course-card-status.active{color:var(--primary)}.course-card-status.done{color:var(--success)}.course-layout{display:flex;flex:1}.course-page .content{padding:0;max-width:none}.sidebar{width:280px;flex-shrink:0;background:var(--surface-card);border-right:1px solid var(--border);padding:1.5rem 0;overflow-y:auto;height:calc(100vh - 60px);position:sticky;top:60px}.sidebar-list{list-style:none}.sidebar-item{border-left:3px solid transparent}.sidebar-item.active{border-left-color:var(--primary);background:var(--primary-light)}.sidebar-item.completed .sidebar-marker{background:var(--success);color:#fff}.sidebar-item.locked{opacity:.4}.sidebar-btn{width:100%;display:flex;align-items:center;gap:.75rem;padding:.75rem 1.25rem;border:none;background:none;cursor:pointer;text-align:left;font-family:Futura LT,sans-serif;font-size:13px;color:var(--text);transition:background .1s}.sidebar-btn:hover:not(:disabled){background:#1a274408}.sidebar-btn:disabled{cursor:not-allowed}.sidebar-marker{width:28px;height:28px;border-radius:50%;background:var(--surface);border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;font-family:Futura LT,sans-serif;font-size:11px;font-weight:700;flex-shrink:0;color:var(--text-muted)}.sidebar-label{line-height:1.3}.course-content{flex:1;padding:2rem 3rem;max-width:800px;overflow-y:auto}.module-content{line-height:1.7;font-size:15px}.module-content h1{font-size:24px;margin:0 0 1rem}.module-content h2{font-size:20px;margin:1.5rem 0 .75rem}.module-content h3{font-size:16px;margin:1.25rem 0 .5rem}.module-content p{margin-bottom:.75rem}.module-content ul,.module-content ol{margin:.5rem 0 .75rem 1.5rem}.module-content li{margin-bottom:.25rem}.module-content table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:14px}.module-content th,.module-content td{padding:8px 12px;border:1px solid var(--border);text-align:left}.module-content th{background:var(--surface);font-weight:600}.module-content blockquote{border-left:3px solid var(--primary);background:var(--primary-light);padding:.75rem 1rem;margin:1rem 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:14px}.module-content code{background:#1a27440f;padding:2px 6px;border-radius:4px;font-size:13px}.module-content pre{background:var(--navy);color:#e0e6f0;padding:1rem;border-radius:var(--radius-sm);overflow-x:auto;margin:1rem 0}.module-content pre code{background:none;padding:0;color:inherit}.module-content img{max-width:100%;border-radius:var(--radius-sm);margin:1rem 0}.module-content strong{font-weight:600}.module-nav{display:flex;align-items:center;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border)}.quiz{margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border)}.quiz-title{font-size:18px;font-weight:700;margin-bottom:1.25rem}.quiz-question{margin-bottom:1.5rem}.quiz-question-text{font-weight:500;margin-bottom:.75rem;line-height:1.5}.quiz-options{display:flex;flex-direction:column;gap:.5rem}.quiz-option{display:block;width:100%;padding:12px 16px;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-card);text-align:left;font-family:Futura LT,sans-serif;font-size:14px;color:var(--text);cursor:pointer;transition:all .15s}.quiz-option:hover:not(:disabled){border-color:var(--primary);background:var(--primary-light)}.quiz-option.selected{border-color:var(--primary);background:var(--primary-light)}.quiz-option.correct{border-color:var(--success);background:var(--success-bg)}.quiz-option.wrong{border-color:var(--error);background:var(--error-bg)}.quiz-feedback{margin-top:.5rem;padding:.5rem .75rem;border-radius:var(--radius-sm);font-size:13px;line-height:1.5}.quiz-feedback.correct{background:var(--success-bg);color:var(--success)}.quiz-feedback.wrong{background:var(--error-bg);color:var(--error)}.quiz-submit{margin-top:1rem}.quiz-result{margin-top:1rem;padding:1rem;border-radius:var(--radius-sm);text-align:center}.quiz-result.passed{background:var(--success-bg)}.quiz-result.failed{background:var(--error-bg)}.quiz-result-text{font-family:Futura LT,sans-serif;font-weight:700;font-size:15px;margin-bottom:.25rem}.quiz-score{font-size:13px;color:var(--text-muted);margin-bottom:.75rem}.quiz-completed-badge{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--success-bg);color:var(--success);border-radius:var(--radius-sm);font-family:Futura LT,sans-serif;font-weight:700;font-size:13px;margin-top:1.5rem}.admin-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:1.5rem}.stat-card{text-align:center}.stat-value{font-family:Futura LT,sans-serif;font-size:28px;font-weight:700;color:var(--navy)}.stat-label{font-size:12px;color:var(--text-hint);margin-top:2px}.section-title{font-size:16px;font-weight:700;margin-bottom:1.25rem;padding-bottom:.75rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.5rem}.count{background:var(--primary);color:#fff;border-radius:10px;font-size:11px;padding:2px 8px;font-weight:700}.admin-add-form{display:flex;gap:.75rem;flex-wrap:wrap}.admin-add-form .input{flex:1;min-width:150px;margin:0}.admin-table{width:100%;border-collapse:collapse;font-size:13px}.admin-table th{text-align:left;padding:8px 12px;border-bottom:2px solid var(--border);font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-hint)}.admin-table td{padding:8px 12px;border-bottom:1px solid var(--border)}.student-row:hover,.enrollment-row{background:#1a274405}.enrollment-row td{font-size:12px}.role-badge{font-size:10px;font-weight:700;padding:2px 8px;border-radius:10px;text-transform:uppercase;letter-spacing:.04em}.role-badge.admin{background:var(--primary-light);color:var(--primary)}.role-badge.student{background:var(--success-bg);color:var(--success)}.completed-badge{color:var(--success);margin-left:6px}.toast{position:fixed;bottom:2rem;left:50%;transform:translate(-50%) translateY(80px);background:var(--navy);color:#fff;padding:12px 24px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;transition:transform .3s ease;z-index:999}.toast.show{transform:translate(-50%) translateY(0)}@media(max-width:768px){.sidebar{display:none}.course-content{padding:1.5rem}.course-grid{grid-template-columns:1fr}.admin-stats{grid-template-columns:1fr 1fr}.admin-add-form{flex-direction:column}.header-inner{padding:0 1rem;gap:1rem}.login-box{padding:1.75rem;margin:1rem}}