body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        .form-container {
            background-color: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
            max-width: 400px;
            width: 100%;
            text-align: center;
            position: relative;
        }
        .form-container input,
        .form-container select {
            width: calc(100% - 22px);
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
            box-sizing: border-box;
            margin-bottom: 20px;
            margin-top:15px;
        }
        .form-container input[type="submit"],
        .form-container button {
            background-color: #28a745;
            color: #fff;
            border: none;
            padding: 12px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            width: 100%;
        }
        .form-container input[type="submit"]:hover,
        .form-container button:hover {
            background-color: #218838;
        }
        .form-container .hidden {
            display: none;
        }

        /*.blink {*/
        /*font-family*/
        /*}*/

        @keyframes blink-animation {
            0% { opacity: 1; }
            50% { opacity: 0; }
            100% { opacity: 1; }
        }

        /* CSS untuk gambar */
        .form-container img {
            width: 100%;
            height: auto; /* Menjaga aspek rasio gambar */
            display: block; /* Menghilangkan ruang ekstra di bawah gambar */
            margin: 0; /* Menghapus margin default */
        }

        /* CSS untuk marquee */
        h3 marquee {
            display: block;
            font-size: 16px;
            color: #333;
        }

        /* CSS untuk feedback validasi */
        select:invalid {
            border-color: #dc3545;
        }

        select:valid {
            border-color: #28a745;
        }

        /* CSS untuk loading */
        .loading {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.8);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 999;
            visibility: hidden; /* Hidden by default */
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .loading.show {
            visibility: visible;
            opacity: 1;
        }
        .loading .spinner {
            border: 8px solid #f3f3f3; /* Light grey */
            border-top: 8px solid #3498db; /* Blue */
            border-radius: 50%;
            width: 50px;
            height: 50px;
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .registration-container {
  background-color: #add8e6; /* Light blue background */
  padding: 20px; /* Padding inside the container */
  border-radius: 8px; /* Rounded corners */
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1); /* Shadow for a subtle 3D effect */
}

.registration-container h5 {
  margin-top: 0; /* Remove default margin from h5 */
}

.registration-container p {
  margin-bottom: 0; /* Remove default margin from p */
}

/* Custom styles for dropdowns */
.custom-select {
  background-color: #f8f9fa;
  border: 2px solid #ced4da;
  border-radius: 0.5rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  padding: 0.375rem 1.75rem 0.375rem 0.75rem;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 16px 12px;
}

.custom-select:focus {
  border-color: #80bdff;
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(0, 123, 255, 0.25);
}

.custom-select option {
  background-color: #fff;
  color: #343a40;
}

.custom-select option:hover {
  background-color: #e9ecef;
}

.custom-select option:checked {
  background-color: #007bff;
  color: #fff;
}