body, html {
            height: 100%;
            margin: 0;
            font-family: Arial, sans-serif;
        }

        .parallax {
            background-image: url('../pic/bg-vdk2025.png');
            min-height: 100vh;
            background-attachment: fixed;
            background-position: center;
            background-repeat: no-repeat;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .login-container {
            background: rgba(255,255,255,0.95);
            padding: 40px 30px;
            border-radius: 12px;
            box-shadow: 0 8px 32px 0 rgba(31,38,135,0.2);
            max-width: 350px;
            width: 100%;
        }

        h2 {
            text-align: center;
            margin-bottom: 24px;
            color: #333;
            font-size: 24px;
        }

        label {
            font-weight: bold;
            color: #444;
            font-size: 14px;
        }

        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 10px;
            margin: 8px 0 16px 0;
            border: 1px solid #ccc;
            border-radius: 6px;
            box-sizing: border-box;
            font-size: 14px;
        }

        .password-wrapper {
            position: relative;
        }

        .password-wrapper input {
            padding-right: 40px;
        }

       .password-wrapper i {
            position: absolute;
            top: 45%;
            right: 12px;
            transform: translateY(-50%);
            cursor: pointer;
            color: #888;
            font-size: 16px;
            line-height: 1;
            height: 100%;
            display: flex;
            align-items: center;
        }


        button[type="submit"] {
            width: 100%;
            background: #007bff;
            color: #fff;
            padding: 12px;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            cursor: pointer;
            transition: background 0.2s;
        }

        button[type="submit"]:hover {
            background: #0056b3;
        }

        .error-message {
            color: #d8000c;
            background: #ffd2d2;
            padding: 10px;
            border-radius: 6px;
            margin-bottom: 16px;
            text-align: center;
            font-size: 14px;
        }

        @media (max-width: 480px) {
            .login-container {
                padding: 30px 20px;
                max-width: 100%;
                border-radius: 8px;
            }

            h2 {
                font-size: 20px;
                margin-bottom: 20px;
            }

            label {
                font-size: 13px;
            }

            input[type="text"],
            input[type="password"],
            button[type="submit"] {
                font-size: 14px;
                padding: 10px;
            }

            .error-message {
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .parallax {
                background-image: url('../pic/bg-vdk2025mobile.png');
                background-attachment: scroll;
            }
        }