body {
       background: linear-gradient(135deg, #007BFF 0%, #87CEFA 100%);
       min-height: 100vh;
       display: flex;
       align-items: center;
       justify-content: center;
       background-image: url('<?php echo base_url(); ?>img/26.png');
       background-position: center;
   }

   .login-card {
       background: rgba(255, 255, 255, 0.95);
       border-radius: 20px;
       box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
       padding: 40px 30px;
       width: 100%;
       max-width: 400px;
       position: relative;
       overflow: hidden;
   }

   .login-card::before {
       content: "";
       position: absolute;
       top: -50px;
       left: -50px;
       width: 200%;
       height: 200%;
       background: radial-gradient(circle at 30% 30%, rgba(0, 123, 255, 0.1) 0%, transparent 70%),
           radial-gradient(circle at 70% 70%, rgba(135, 206, 250, 0.15) 0%, transparent 70%);
       z-index: 0;
   }

   .login-card h3 {
       font-weight: bold;
       color: #007BFF;
       position: relative;
       z-index: 1;
   }

   .form-control {
       border-radius: 50px;
       padding: 12px 20px;
   }

   .btn-login {
       background: #007BFF;
       color: white;
       border-radius: 50px;
       padding: 12px;
       font-weight: bold;
       transition: all 0.3s;
   }

   .btn-batal {
       background: #f08d8dff;
       color: white;
       border-radius: 50px;
       padding: 12px;
       font-weight: bold;
       transition: all 0.3s;
   }

   .btn-batal:hover {
       background: #b40101ff;
       transform: translateY(-2px);
   }

   .btn-login:hover {
       background: #0056b3;
       transform: translateY(-2px);
   }

   .logo {
       width: 70px;
       height: 70px;
       margin-bottom: 15px;
   }

   body {
       min-height: 100vh;
       display: flex;
       font-family: "Segoe UI", sans-serif;
   }

   /* Sidebar */
   .sidebar {
       width: 240px;
       background: linear-gradient(180deg, #007BFF 0%, #87CEFA 100%);
       color: white;
       flex-shrink: 0;
       display: flex;
       flex-direction: column;
       padding-top: 20px;
   }

   .sidebar h4 {
       text-align: center;
       font-weight: bold;
       margin-bottom: 20px;
   }

   .sidebar a {
       color: white;
       text-decoration: none;
       padding: 12px 20px;
       display: block;
       border-radius: 8px;
       margin: 5px 10px;
       transition: 0.3s;
   }

   .sidebar a:hover,
   .sidebar a.active {
       background: rgba(255, 255, 255, 0.2);
   }

   /* Content */
   .content {
       flex-grow: 1;
       background: #f8f9fa;
       padding: 20px;
   }

   .topbar {
       background: white;
       padding: 10px 20px;
       border-radius: 10px;
       margin-bottom: 20px;
       box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
       display: flex;
       justify-content: space-between;
       align-items: center;
   }

   .card-custom {
       border-radius: 12px;
       box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
   }