@keyframes slideIn{0%{transform:translateY(-50px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes shake{0%,to{transform:translateX(0)}10%,30%,50%,70%,90%{transform:translateX(-10px)}20%,40%,60%,80%{transform:translateX(10px)}}@keyframes shimmer{0%{background-position:-200%0}to{background-position:200%0}}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}body.dashboard-page{background:var(--gradient-dashboard);padding:20px;min-height:100vh}.dashboard-container{max-width:1400px;margin:0 auto;background:#fff;border-radius:15px;padding:30px;box-shadow:0 20px 60px rgba(0,0,0,.3)}.dashboard-header{text-align:center;margin-bottom:30px;padding-bottom:20px;border-bottom:3px solid var(--teal)}.dashboard-header h1,.section h2,.stat-card h3{color:var(--primary-dark);margin-bottom:10px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-bottom:30px}.stat-card{background:linear-gradient(135deg,rgba(0,167,157,.1),rgba(123,104,238,.1));border-radius:12px;padding:20px;border-left:4px solid var(--teal);transition:transform .3s ease}.stat-card:hover{transform:translateY(-5px);box-shadow:0 10px 25px rgba(0,167,157,.2)}.stat-card h3{color:var(--teal);font-size:.9rem;text-transform:uppercase}.stat-card .stat-value{font-size:2.5rem;font-weight:700;color:var(--primary-dark);margin-bottom:5px}.stat-card .stat-label{color:#666;font-size:.85rem}.section{background:#f8f9fa;border-radius:12px;padding:25px;margin-bottom:20px}.section h2{margin-bottom:20px;display:flex;align-items:center;gap:10px}.access-table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden}.access-table caption{padding:10px;font-weight:600;font-size:.9rem;color:var(--primary-dark);text-align:left;caption-side:top}.access-table thead{background:var(--gradient-header);color:#fff}.access-table td,.access-table th{padding:12px;text-align:left}.access-table tbody tr:nth-child(even){background:#f8f9fa}.access-table tbody tr:hover{background:rgba(0,167,157,.1)}.badge{display:inline-block;padding:4px 12px;border-radius:12px;font-size:.8rem;font-weight:600}.badge-teacher{background:linear-gradient(135deg,gold,#ffed4e);color:#333}.badge-student{background:var(--gradient-header);color:#fff}.action-buttons{display:flex;gap:15px;margin-bottom:20px;flex-wrap:wrap}.btn{padding:12px 24px;border-radius:8px;border:0;cursor:pointer;font-size:1rem;font-weight:600;transition:all .3s ease;display:inline-flex;align-items:center;gap:8px}.btn-primary{background:var(--gradient-header);color:#fff}.btn-primary:hover,.btn-success:hover{transform:translateY(-2px);box-shadow:0 5px 15px rgba(0,167,157,.3)}.btn-success{background:#28a745;color:#fff}.btn-success:hover{background:#218838;box-shadow:0 5px 15px rgba(40,167,69,.3)}.btn-secondary{background:#6c757d;color:#fff}.btn-secondary:hover{background:#5a6268}.btn-danger{background:#dc3545;color:#fff}.btn-danger:hover{background:#c82333}.btn-logout{background:#ff6b6b;color:#fff;border:2px solid #ff5252}.btn-logout:hover{background:#ff5252;transform:translateY(-2px);box-shadow:0 5px 15px rgba(255,82,82,.3)}.chart-container{background:#fff;border-radius:8px;padding:20px;margin-top:20px}.empty-state i{opacity:.3;font-size:4rem;color:#d0d0d0;margin-bottom:20px}.auth-modal,.form-group label{display:flex;align-items:center}.auth-modal{position:fixed;top:0;left:0;width:100vw;height:100vh;background:var(--gradient-dashboard);justify-content:center;z-index:10000}.auth-modal-content{background:#fff;border-radius:20px;padding:40px;max-width:450px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:slideIn .4s ease-out}.auth-header{text-align:center;margin-bottom:30px}.auth-header h2{color:var(--primary-dark);margin:15px 0 10px;font-size:1.8rem}.auth-header p{color:#666;font-size:.95rem}.auth-body,.form-group{display:flex;flex-direction:column;gap:20px}.form-group{gap:8px}.form-group label{font-weight:600;color:var(--primary-dark);font-size:.95rem;gap:8px}.password-input-wrapper{position:relative;display:flex;align-items:center}.auth-input{padding:14px 50px 14px 16px;border:2px solid #e0e0e0;border-radius:10px;font-size:1rem;transition:all .3s ease;font-family:inherit;width:100%}.auth-input:focus{outline:0;border-color:var(--teal);box-shadow:0 0 0 3px rgba(0,167,157,.1)}.toggle-password{position:absolute;right:10px;background:0 0;border:0;color:#666;cursor:pointer;padding:8px 12px;font-size:1.1rem;transition:all .3s ease;display:flex;align-items:center;justify-content:center}.toggle-password:hover{color:var(--teal);transform:scale(1.1)}.toggle-password:active{transform:scale(.95)}.auth-error,.btn-auth,.btn-cancel{border-radius:10px;display:flex;align-items:center;gap:10px}.auth-error{background:rgba(220,53,69,.1);border:2px solid #dc3545;padding:12px 16px;color:#dc3545;font-size:.9rem;font-weight:600}.btn-auth,.btn-cancel{cursor:pointer;transition:all .3s ease;justify-content:center}.btn-auth{padding:14px 24px;background:var(--gradient-header);color:#fff;border:0;font-size:1.05rem;font-weight:700}.btn-auth:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,167,157,.3)}.btn-auth:active{transform:translateY(0)}.btn-cancel{padding:12px 24px;background:0 0;color:#666;border:2px solid #e0e0e0;font-size:1rem;font-weight:600}.btn-cancel:hover{background:#f8f9fa;border-color:#999;color:#333}@media (max-width:768px){.stats-grid{grid-template-columns:1fr}.access-table{font-size:.85rem}.access-table td,.access-table th{padding:8px}.dashboard-container{padding:20px}.action-buttons{flex-direction:column}.btn{width:100%;justify-content:center}}.skeleton{background:linear-gradient(90deg,#f0f0f0 0,#e0e0e0 20%,#f0f0f0 40%,#f0f0f0 100%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:8px}.skeleton-stat-card{background:linear-gradient(135deg,rgba(0,167,157,.05),rgba(123,104,238,.05));border-radius:12px;padding:20px;border-left:4px solid #e0e0e0}.skeleton-stat-card .skeleton-title{width:60%;height:16px;margin-bottom:12px}.skeleton-stat-card .skeleton-value{width:80%;height:40px;margin-bottom:8px}.skeleton-stat-card .skeleton-label{width:50%;height:14px}.skeleton-table-row{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;padding:15px;background:#fff;border-radius:8px;margin-bottom:10px}.skeleton-table-row .skeleton{height:20px}.loading-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(255,255,255,.9);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:1000;border-radius:15px}.loading-spinner{width:50px;height:50px;border:4px solid #f0f0f0;border-top:4px solid var(--teal);border-radius:50%;animation:spin 1s linear infinite}.loading-text{margin-top:15px;color:var(--primary-dark);font-weight:600;font-size:1.1rem}.content-loaded .skeleton-loader{display:none}.fade-in{animation:fadeIn .5s ease-in}.empty-state{text-align:center;padding:60px 20px;color:#666}.empty-state h3{color:var(--primary-dark);margin-bottom:10px}.empty-state p{color:#999;font-size:.95rem}.auth-icon{font-size:3rem;color:var(--teal)}.dashboard-header p{color:#666}.dashboard-meta{margin-top:15px}#teacherInfo{background:rgba(255,215,0,.2);padding:8px 16px;border-radius:20px;font-weight:600}@media (prefers-reduced-motion:reduce){.auth-modal,.auth-modal *,.dashboard-container,.dashboard-container *{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}