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768px){.clases-online{padding:15px}.clases-header{flex-direction:column;gap:15px;align-items:flex-start}.classes-grid{grid-template-columns:1fr}.filters-section{flex-direction:column;gap:15px;align-items:flex-start}.modal-content{margin:10px;max-width:calc(100% - 20px)}}.login-container{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 60px);padding:20px;background:linear-gradient(135deg,#bfdbfe,#bfdbfe)}.login-card{background:#fff;border-radius:12px;box-shadow:0 10px 30px #0000001a;padding:40px;width:100%;max-width:400px}.login-header{text-align:center;margin-bottom:30px}.login-icon{font-size:48px;display:block;margin-bottom:10px}.login-header h1{font-size:28px;color:#1e3a8a;margin-bottom:8px}.login-header p{color:#6b7280;font-size:14px}.login-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-size:14px;font-weight:500;color:#374151}.form-group input{padding:12px;border:1px solid #d1d5db;border-radius:6px;font-size:14px;transition:border-color .2s}.form-group input:focus{outline:none;border-color:#1d4ed8;box-shadow:0 0 0 3px #3b82f61a}.btn-login-submit{padding:12px;background-color:#1e3a8a;color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:500;cursor:pointer;transition:background-color .2s;margin-top:10px}.btn-login-submit:hover{background-color:#1d4ed8}.login-footer{margin-top:20px;text-align:center}.login-footer p{font-size:12px;color:#6b7280;margin:5px 0}.demo-info{color:#1d4ed8;font-weight:500;margin-top:10px}.App{min-height:100vh;display:flex;flex-direction:column}.app-container{display:flex;flex:1;margin-top:60px}.main-content{flex:1;padding:20px;margin-left:0;transition:margin-left .3s ease;width:100%;overflow-x:hidden}@media (max-width: 768px){.app-container{margin-top:56px}.main-content{padding:15px}}@media (min-width: 768px){.main-content{margin-left:250px}}