.login-container {
            max-width: 400px;
            margin: 100px auto;
            padding: 30px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }
        .login-container h2 {
            text-align: center;
            margin-bottom: 25px;
            color: var(--primary-green);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
        }
        .form-group input {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        .btn-login {
            width: 100%;
            padding: 12px;
            background-color: var(--primary-green);
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            font-weight: bold;
            transition: background 0.3s;
        }
        .btn-login:hover {
            background-color: #3d5a3d;
        }
        #error-message {
            color: #ff4d4d;
            text-align: center;
            margin-top: 15px;
            display: none;
        }