.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2)}.login-card{background:#fff;border-radius:12px;padding:40px;width:100%;max-width:450px;box-shadow:0 10px 40px #0000001a}.login-card h1{color:#667eea;margin-bottom:10px;text-align:center;font-size:32px}.login-card h2{color:#333;margin-bottom:30px;text-align:center;font-size:24px}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:#555}.form-group input{width:100%;margin-bottom:0}.login-card button{width:100%;padding:12px;font-size:16px;margin-top:10px}.demo-credentials{margin-top:30px;padding:20px;background-color:#f8f9fa;border-radius:8px;text-align:center}.demo-credentials p{margin:5px 0;font-size:14px;color:#666}.demo-credentials p:first-child{font-weight:700;color:#333;margin-bottom:10px}.admin-dashboard{min-height:100vh;background-color:#f5f5f5}.dashboard-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px 40px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 8px #0000001a}.dashboard-header h1{margin:0;font-size:28px}.header-actions{display:flex;gap:20px;align-items:center}.header-actions span{font-size:16px}.dashboard-tabs{background:#fff;padding:0 40px;display:flex;gap:0;box-shadow:0 2px 4px #0000000d}.dashboard-tabs button{background:none;border:none;padding:16px 24px;font-size:16px;color:#666;border-bottom:3px solid transparent;transition:all .3s}.dashboard-tabs button:hover{color:#667eea}.dashboard-tabs button.active{color:#667eea;border-bottom-color:#667eea;font-weight:600}.dashboard-content{padding:30px 40px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.section-header h2{margin:0;font-size:24px;color:#333}.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.course-card{background:#fff;border-radius:8px;padding:20px;box-shadow:0 2px 8px #0000001a;transition:transform .3s,box-shadow .3s}.course-card:hover{transform:translateY(-4px);box-shadow:0 4px 16px #00000026}.course-card h3{margin:0 0 10px;font-size:20px;color:#333}.course-card p{color:#666;margin:0 0 16px;font-size:14px;line-height:1.5}.course-meta{display:flex;gap:12px;align-items:center;margin-bottom:16px;font-size:14px;color:#666}.card-actions{display:flex;gap:8px;flex-wrap:wrap}.card-actions button{flex:1;min-width:70px;padding:8px 12px;font-size:13px}.modal-actions{display:flex;gap:12px;margin-top:20px}.modal-actions button{flex:1}.badge.draft{background-color:#f8f9fa;color:#6c757d}.badge.published{background-color:#d4edda;color:#155724}.badge.archived{background-color:#f8d7da;color:#721c24}.badge.active{background-color:#d4edda;color:#155724}.badge.inactive{background-color:#f8d7da;color:#721c24}.badge.enrolled,.badge.in_progress{background-color:#d1ecf1;color:#0c5460}.badge.completed{background-color:#d4edda;color:#155724}.badge.dropped{background-color:#f8d7da;color:#721c24}.student-dashboard{min-height:100vh;background-color:#f5f5f5}.student-dashboard .dashboard-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px 40px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 8px #0000001a}.student-dashboard .dashboard-header h1{margin:0;font-size:28px}.student-dashboard .header-actions{display:flex;gap:20px;align-items:center}.student-dashboard .dashboard-tabs{background:#fff;padding:0 40px;display:flex;gap:0;box-shadow:0 2px 4px #0000000d}.student-dashboard .dashboard-tabs button{background:none;border:none;padding:16px 24px;font-size:16px;color:#666;border-bottom:3px solid transparent;transition:all .3s}.student-dashboard .dashboard-tabs button.active{color:#667eea;border-bottom-color:#667eea;font-weight:600}.student-dashboard .dashboard-content{padding:30px 40px}.student-dashboard .dashboard-content h2{margin-bottom:24px;font-size:24px;color:#333}.progress-section{margin:16px 0}.progress-label{display:flex;justify-content:space-between;margin-bottom:8px;font-size:14px;color:#666;font-weight:500}.progress-section .progress-bar{height:24px}.progress-section .progress-bar-fill{font-size:13px;font-weight:600}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica 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#ddd;border-radius:4px;font-size:14px}input:focus,textarea:focus,select:focus{outline:none;border-color:#007bff}.card{background:#fff;border-radius:8px;padding:20px;margin-bottom:20px;box-shadow:0 2px 4px #0000001a}.table{width:100%;border-collapse:collapse;background:#fff}.table th,.table td{padding:12px;text-align:left;border-bottom:1px solid #ddd}.table th{background-color:#f8f9fa;font-weight:600}.badge{display:inline-block;padding:4px 8px;border-radius:12px;font-size:12px;font-weight:500}.badge.success{background-color:#d4edda;color:#155724}.badge.warning{background-color:#fff3cd;color:#856404}.badge.danger{background-color:#f8d7da;color:#721c24}.badge.info{background-color:#d1ecf1;color:#0c5460}.progress-bar{width:100%;height:20px;background-color:#e9ecef;border-radius:10px;overflow:hidden}.progress-bar-fill{height:100%;background-color:#28a745;transition:width .3s;display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px}.alert{padding:15px;border-radius:4px;margin-bottom:20px}.alert.success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert.error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.alert.warning{background-color:#fff3cd;color:#856404;border:1px solid #ffeaa7}.alert.info{background-color:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;border-radius:8px;padding:30px;max-width:600px;width:90%;max-height:90vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.modal-title{font-size:24px;font-weight:600}.modal-close{background:none;border:none;font-size:24px;cursor:pointer;padding:0;width:30px;height:30px}.loading{text-align:center;padding:40px}.spinner{border:4px solid #f3f3f3;border-top:4px solid #007bff;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}