@import"https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap";:root{--primary: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--primary-surface: #eef2ff;--primary-hover: #4f46e5;--accent-violet: #7c3aed;--accent-teal: #0d9488;--accent-amber: #d97706;--accent-rose: #e11d48;--accent-sky: #0284c7;--accent-emerald: #059669;--accent-fuchsia: #a21caf;--bg: #f5f6fa;--bg-subtle: #f0f1f8;--surface: #ffffff;--surface-2: #f8f9fe;--surface-hover: #f0f1f8;--surface-pressed: #e8eaf6;--border: #e2e4f0;--border-light: #eceef8;--divider: #e5e7eb;--text-primary: #111827;--text-secondary: #4b5563;--text-tertiary: #9ca3af;--text-on-primary: #ffffff;--text-link: #6366f1;--success: #059669;--success-bg: #ecfdf5;--success-border: #a7f3d0;--warning: #d97706;--warning-bg: #fffbeb;--warning-border: #fde68a;--error: #dc2626;--error-bg: #fef2f2;--error-border: #fecaca;--info: #0284c7;--info-bg: #eff6ff;--info-border: #bfdbfe;--sidebar-bg: #ffffff;--sidebar-bg-2: #f9fafb;--sidebar-border: #e5e7eb;--sidebar-text: #4b5563;--sidebar-text-hover: #111827;--sidebar-active-bg: #eef2ff;--sidebar-active-text: #4f46e5;--sidebar-active-border: #6366f1;--sidebar-section-title: #9ca3af;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .04);--shadow-sm: 0 1px 4px rgba(0, 0, 0, .06), 0 4px 12px rgba(99, 102, 241, .05);--shadow-md: 0 4px 8px rgba(0, 0, 0, .06), 0 12px 28px rgba(99, 102, 241, .08);--shadow-lg: 0 10px 20px rgba(0, 0, 0, .08), 0 24px 52px rgba(99, 102, 241, .1);--shadow-hover: 0 8px 24px rgba(99, 102, 241, .22);--shadow-glow: 0 0 0 3px rgba(99, 102, 241, .18);--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-xs: 6px;--radius-sm: 10px;--radius-md: 14px;--radius-lg: 18px;--radius-xl: 24px;--radius-2xl: 32px;--radius-full: 9999px;--font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-size-xs: 11px;--font-size-sm: 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var(--transition)}a:hover{color:var(--primary-dark)}button{font-family:inherit;cursor:pointer;border:none;outline:none;letter-spacing:-.01em}input,textarea,select{font-family:inherit;font-size:var(--font-size-base)}.app-layout{display:flex;min-height:100vh}.app-main{flex:1;margin-left:var(--sidebar-width);min-height:100vh;padding-top:var(--header-height);transition:margin-left var(--transition)}.app-content{padding:var(--space-lg);max-width:1240px;margin:0 auto}.breadcrumbs{padding:12px 0;margin-bottom:8px;display:flex;align-items:center}.breadcrumb-list{display:flex;align-items:center;list-style:none;font-size:12px;font-weight:500;color:var(--text-tertiary);gap:8px}.breadcrumb-item{display:flex;align-items:center;gap:8px}.breadcrumb-item:not(:last-child):after{content:"keyboard_arrow_right";font-family:Material Icons Outlined;font-size:16px;color:#d1d5db}.breadcrumb-item a{color:var(--text-secondary);transition:color .2s}.breadcrumb-item a:hover{color:var(--primary)}.breadcrumb-item.active{color:var(--primary);font-weight:600}.sidebar{width:var(--sidebar-width);height:100vh;position:fixed;left:0;top:0;background:var(--sidebar-bg);display:flex;flex-direction:column;z-index:100;transition:transform var(--transition);overflow:hidden}.sidebar:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,#6366f1,#8b5cf6,#a78bfa);z-index:1}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:90;animation:fadeIn .2s ease}.sidebar-logo{padding:0 var(--space-md);height:var(--header-height);display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--sidebar-border);flex-shrink:0}.sidebar-close-btn{display:none;background:transparent;border:none;color:var(--sidebar-text);cursor:pointer;padding:6px;border-radius:var(--radius-full);margin-left:auto;transition:all 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var(--border)}.btn-secondary:hover{background:var(--primary-surface);border-color:var(--primary-light);box-shadow:var(--shadow-xs)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--surface-hover);color:var(--text-primary)}.btn-danger{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;box-shadow:0 2px 8px #dc262633}.btn-danger:hover{background:linear-gradient(135deg,#dc2626,#b91c1c);box-shadow:0 4px 14px #dc26264d;transform:translateY(-1px)}.btn-fab{position:fixed;bottom:var(--space-lg);right:var(--space-lg);width:56px;height:56px;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 8px 24px #6366f166;display:flex;align-items:center;justify-content:center;z-index:50;transition:all var(--transition-bounce)}.btn-fab:hover{box-shadow:0 12px 32px #6366f180;transform:scale(1.08) 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60%);z-index:0}.card-header-bg{position:absolute;top:0;right:0;bottom:0;left:0;opacity:1;border-radius:0}.card-header h3{position:relative;font-size:var(--font-size-lg);font-weight:700;z-index:1;line-height:1.3;letter-spacing:-.3px}.card-header .card-subtitle{position:relative;font-size:var(--font-size-sm);opacity:.85;z-index:1;margin-top:3px;font-weight:500}.card-body{padding:var(--space-md) var(--space-lg)}.card-footer{padding:10px var(--space-lg);border-top:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between;background:var(--surface-2)}.class-card{cursor:pointer;position:relative}.class-card .card-header{min-height:116px;padding:var(--space-lg)}.class-card .card-header h3{font-size:var(--font-size-xl);letter-spacing:-.5px}.class-card .card-body{min-height:72px}.class-card .card-footer{justify-content:flex-end;gap:var(--space-sm)}.lesson-card{cursor:pointer}.lesson-card .card-header{min-height:80px;padding:var(--space-md) var(--space-lg)}.lesson-card .lesson-meta{display:flex;gap:var(--space-md);flex-wrap:wrap;margin-top:var(--space-sm)}.lesson-meta-item{display:flex;align-items:center;gap:5px;font-size:var(--font-size-sm);color:var(--text-secondary)}.lesson-meta-item .material-icons-outlined{font-size:15px;color:var(--text-tertiary)}.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:var(--radius-full);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;border:1px solid transparent}.badge-draft{background:var(--warning-bg);color:var(--warning);border-color:var(--warning-border)}.badge-published,.badge-approved{background:var(--success-bg);color:var(--success);border-color:var(--success-border)}.badge-archived{background:var(--surface-hover);color:var(--text-tertiary)}.badge-pending{background:var(--info-bg);color:var(--info);border-color:var(--info-border)}.badge-role{font-size:11px;padding:2px 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h2{font-size:var(--font-size-lg);font-weight:700;color:var(--text-primary);letter-spacing:-.4px}.modal-body{padding:var(--space-lg)}.modal-footer{padding:var(--space-md) var(--space-lg);border-top:1px solid var(--border-light);display:flex;justify-content:flex-end;gap:var(--space-sm);background:var(--surface-2);border-radius:0 0 var(--radius-lg) var(--radius-lg)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e1b4b,#312e81 40%,#4c1d95);padding:var(--space-lg);position:relative;overflow:hidden}.auth-page:before{content:"";position:absolute;width:600px;height:600px;background:radial-gradient(circle,rgba(99,102,241,.15) 0%,transparent 70%);top:-200px;right:-200px;border-radius:50%}.auth-page:after{content:"";position:absolute;width:400px;height:400px;background:radial-gradient(circle,rgba(167,139,250,.12) 0%,transparent 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h1{font-size:26px;font-weight:800;color:var(--text-primary);letter-spacing:-.8px}.auth-subtitle{text-align:center;color:var(--text-secondary);margin-bottom:var(--space-xl);font-size:var(--font-size-md);font-weight:500}.auth-footer{text-align:center;margin-top:var(--space-lg);font-size:var(--font-size-sm);color:var(--text-secondary)}.auth-footer a{color:var(--primary);font-weight:600}.auth-error{background:var(--error-bg);color:var(--error);padding:12px var(--space-md);border-radius:var(--radius-sm);margin-bottom:var(--space-md);font-size:13px;font-weight:500;border:1px solid var(--error-border);display:flex;align-items:center;gap:8px}.dashboard-welcome{padding:var(--space-xl) var(--space-xl);background:linear-gradient(135deg,#4f46e5,#7c3aed,#9333ea);border-radius:var(--radius-lg);color:#fff;margin-bottom:var(--space-xl);position:relative;overflow:hidden;box-shadow:0 8px 32px #6366f159}.dashboard-welcome:before{content:"";position:absolute;width:300px;height:300px;background:#ffffff0f;border-radius:50%;right:-80px;top:-100px}.dashboard-welcome:after{content:"";position:absolute;width:180px;height:180px;background:#ffffff0d;border-radius:50%;left:60%;bottom:-60px}.dashboard-welcome h2{font-size:26px;font-weight:800;margin-bottom:6px;letter-spacing:-.5px;position:relative;z-index:1}.dashboard-welcome p{font-size:var(--font-size-md);opacity:.88;font-weight:500;position:relative;z-index:1}.dashboard-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:var(--space-md);margin-bottom:var(--space-xl)}.stat-card{background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius-md);padding:var(--space-lg);display:flex;align-items:center;gap:var(--space-md);transition:all 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