:root {
            --color-dark-blue: #2d4a66;
            --color-teal: #49b5c3;
            --bg-light: #f4f7f6;
        }

        /* --- Header --- */
        .auth-header {
            text-align: center;
            padding: 40px 0 20px;
        }
        .auth-logo {
            max-width: 150px;
            margin-bottom: 20px;
        }
        .auth-title {
            color: var(--color-dark-blue);
            font-weight: 800;
            font-size: 1.6rem;
            margin-bottom: 20px;
        }

        .auth-container {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 50px;
        }

        .auth-wrapper {
            background: #fff;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            width: 100%;
            max-width: 450px;
        }

        .form-label {
            font-size: 0.9rem;
            font-weight: bold;
            color: var(--color-dark-blue);
        }

        .form-control {
            border-radius: 8px;
            padding: 12px 15px;
            border: 1px solid #e0e0e0;
        }

        .form-control:focus {
            border-color: var(--color-teal);
            box-shadow: 0 0 0 0.25rem rgba(73, 181, 195, 0.25);
        }

        .btn-submit {
            background-color: var(--color-teal);
            color: white;
            border: none;
            padding: 12px;
            border-radius: 8px;
            width: 100%;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .btn-submit:hover {
            background-color: #3aa1af;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(73, 181, 195, 0.3);
        }
        .btn-submit:disabled {
            background-color: #cccccc;
            border-color: #cccccc;
            cursor: not-allowed;
            opacity: 0.7;
        }
        
        .message {
            margin-top: 15px;
            text-align: center;
            font-size: 0.9rem;
            font-weight: bold;
        }