:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;min-width:320px}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--primary: #1a5f7a;--primary-light: #2d7f9d;--secondary: #159895;--accent: #57c5b6;--light: #f8f9fa;--dark: #343a40;--success: #28a745;--danger: #dc3545;--warning: #ffc107;--gray: #6c757d;--light-gray: #e9ecef}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#f5f7f9;color:var(--dark);line-height:1.6}html,body{overflow-x:hidden}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);position:relative;overflow:hidden}.login-background{position:absolute;inset:0;z-index:0}.bg-shapes{position:relative;width:100%;height:100%}.bg-shapes div{position:absolute;border-radius:50%;background:#ffffff1a}.shape1{width:300px;height:300px;top:-150px;right:-150px}.shape2{width:200px;height:200px;bottom:-100px;left:-100px}.shape3{width:150px;height:150px;top:50%;left:70%}.login-card{background:#fff;border-radius:15px;padding:30px;box-shadow:0 15px 35px #0000001a;width:100%;max-width:450px;z-index:1;position:relative}.login-header{text-align:center;margin-bottom:30px}.logo{display:flex;align-items:center;justify-content:center;margin-bottom:10px;color:var(--primary)}.logo i{font-size:2.5rem;margin-right:15px}.logo h1{font-size:1.8rem;font-weight:700}.login-header p{color:var(--gray);font-size:1rem}.auth-tabs{display:flex;margin-bottom:25px;border-bottom:2px solid var(--light-gray)}.auth-tab{flex:1;padding:15px;background:none;border:none;cursor:pointer;font-size:1rem;font-weight:600;color:var(--gray);transition:all .3s ease;border-bottom:3px solid transparent}.auth-tab.active{color:var(--primary);border-bottom:3px solid var(--primary)}.auth-tab i{margin-right:8px}.auth-form-container{margin-bottom:25px}.auth-form{display:flex;flex-direction:column}.input-group{position:relative;margin-bottom:20px}.input-group i{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--gray)}.input-group input,.input-group 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span:hover{text-decoration:underline}.test-connection{text-align:center;padding-top:20px;border-top:1px solid var(--light-gray)}.test-connection p{margin-bottom:10px;color:var(--gray)}.test-btn{background:var(--light-gray);color:var(--dark);border:none;padding:10px 15px;border-radius:6px;cursor:pointer;font-size:.9rem;transition:background .3s ease}.test-btn:hover{background:#dde1e5}.container{max-width:1200px;margin:0 auto;padding:20px}.app-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:20px}.sidebar{background:#fff;border-radius:10px;box-shadow:0 5px 15px #0000000d;padding:16px;height:calc(100vh - 60px);position:sticky;top:20px;display:flex;flex-direction:column}.sidebar-logo{display:flex;align-items:center;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--light-gray);margin-bottom:10px;color:var(--primary)}.sidebar-logo i{font-size:1.6rem}.app-logo{height:40px;width:auto;margin-right:12px}.login-header .app-logo{height:60px;margin-right:15px}.menu{display:flex;flex-direction:column;gap:6px}.menu-item{display:flex;align-items:center;justify-content:space-between;background:var(--light);border:1px solid var(--light-gray);border-radius:8px;padding:10px 12px;cursor:pointer;color:var(--dark)}.menu-item span{flex:1;margin-left:10px;text-align:left}.menu-item.active{border-color:var(--primary)}.submenu{display:flex;flex-direction:column;gap:6px;margin:8px 0 12px 24px}.submenu-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:6px;cursor:pointer;color:var(--dark)}.submenu-item.active{background:#eef6fb;color:var(--primary)}.main{min-width:0;overflow-y:auto;overflow-x:hidden}header{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff;padding:20px;border-radius:10px;margin-bottom:20px}.header-content{display:flex;justify-content:space-between;align-items:center}.header-content .logo{display:flex;align-items:center;color:#fff}.header-content .logo i{font-size:2rem;margin-right:15px}.header-content .logo h1{margin:0;font-size:1.5rem}.header-content .logo p{margin:0;opacity:.9}.logout-btn{background:#fff3;color:#fff;border:1px solid rgba(255,255,255,.3);padding:10px 20px;border-radius:6px;cursor:pointer;transition:all .3s ease}.logout-btn:hover{background:#ffffff4d}.tabs{display:flex;border-bottom:2px solid var(--light-gray);margin-bottom:20px}.tab{padding:15px 25px;cursor:pointer;border-bottom:3px solid transparent;font-weight:600;color:var(--gray);transition:all .3s ease}.tab.active{color:var(--primary);border-bottom:3px solid var(--primary)}.tab i{margin-right:8px}.card{background:#fff;border-radius:10px;padding:25px;margin-bottom:20px;box-shadow:0 5px 15px #0000000d}.card h2{margin-bottom:20px;color:var(--primary);display:flex;align-items:center}.card h2 i{margin-right:10px}.code-block{background:#2d2d2d;color:#f8f9fa;padding:20px;border-radius:8px;overflow-x:auto;margin:15px 0;font-family:Fira Code,monospace;font-size:14px;line-height:1.5}.sql-btn{background:var(--primary);color:#fff;border:none;padding:12px 20px;border-radius:6px;cursor:pointer;font-size:1rem;transition:background .3s ease}.sql-btn:hover{background:var(--primary-light)}.table-container{overflow-x:auto}table{width:100%;border-collapse:collapse;margin:15px 0}table th{background:var(--light);padding:15px;text-align:left;font-weight:600;color:var(--dark);border-bottom:2px solid var(--light-gray)}table td{padding:15px;border-bottom:1px solid var(--light-gray)}table tr:hover{background:#f8f9fa}.badge{background:var(--light);padding:5px 10px;border-radius:20px;font-size:.85rem;font-weight:600}.badge.admin{background:#e8f4f8;color:var(--primary)}.badge.instrutor{background:#e8f6f3;color:var(--secondary)}.badge.aluno{background:#fef7e0;color:var(--warning)}.status{padding:5px 10px;border-radius:20px;font-size:.85rem;font-weight:600}.status.active{background:#e8f5e9;color:var(--success)}.status.inactive{background:#ffebee;color:var(--danger)}.no-data{text-align:center;padding:40px;color:var(--gray)}.no-data i{font-size:3rem;margin-bottom:15px;opacity:.5}.no-data p{font-size:1.1rem}.alert{padding:15px;border-radius:8px;margin-bottom:20px;font-weight:500}.alert-success{background:#e8f5e9;color:var(--success);border:1px solid #c3e6cb}.alert-error{background:#ffebee;color:var(--danger);border:1px solid #f5c6cb}.spinner{width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite;margin:0 auto}@keyframes spin{to{transform:rotate(360deg)}}.filters{display:flex;gap:15px;align-items:flex-end;flex-wrap:wrap;margin-bottom:15px}.filter-item{display:flex;flex-direction:column}.filter-item label{font-size:.9rem;color:var(--gray);margin-bottom:5px}.filter-actions{margin-left:auto}.lesson-form{margin:15px 0 10px}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:15px}.form-group{display:flex;flex-direction:column}.form-group-full{grid-column:1 / -1}.form-group label{font-size:.9rem;color:var(--gray);margin-bottom:5px}.form-group input,.form-group select{padding:10px 12px;border:2px solid var(--light-gray);border-radius:8px;font-size:1rem}input[type=text],input[type=email],textarea{text-transform:uppercase}.form-actions{display:flex;gap:10px;margin-top:10px}.checkbox-item{display:inline-flex;align-items:center;gap:8px;background:var(--light);border:1px solid var(--light-gray);padding:6px 10px;border-radius:6px;margin:4px 6px 4px 0}.cfc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}@media (max-width: 1024px){.cfc-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.cfc-grid{grid-template-columns:1fr}}.modal-overlay{position:fixed;inset:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;width:95%;max-width:800px;border-radius:10px;box-shadow:0 10px 30px #0003}.modal-header{padding:16px 20px;border-bottom:1px solid var(--light-gray);display:flex;align-items:center;justify-content:space-between}.modal-body{padding:20px}.save-btn{background:var(--success);color:#fff;border:none;padding:10px 16px;border-radius:6px;cursor:pointer}.cancel-btn{background:var(--light-gray);color:var(--dark);border:none;padding:10px 16px;border-radius:6px;cursor:pointer}.table-btn{background:var(--light);border:1px solid var(--light-gray);color:var(--dark);padding:6px 8px;border-radius:6px;cursor:pointer;margin-right:6px}.table-btn.danger{background:#ffe9e9;color:var(--danger);border-color:#ffd3d3}@media (max-width: 768px){.app-layout{grid-template-columns:1fr}.sidebar{position:static;height:auto}.login-card{padding:20px}.header-content{flex-direction:column;text-align:center}.header-content .logo{margin-bottom:15px;justify-content:center}.tabs{flex-wrap:wrap}.tab{padding:10px 15px;font-size:.9rem}.card{padding:20px}table{font-size:.9rem}table th,table td{padding:10px}.form-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}}@media (min-width: 1200px){.container{max-width:1400px}}