:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --danger-color: #e74c3c;
    --success-color: #27ae60;
    --gray-light: #f0f2f5;
    --text-dark: #2c3e50;
    --text-muted: #555;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-light);
    margin: 0;
    padding: 0;
    font-size: 16px;
    color: var(--text-dark);
}

.container {
    display: flex;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 80px auto;
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.left-panel, .right-panel {
    flex: 1 1 50%;
    min-width: 300px;
    box-sizing: border-box;
}

.left-panel {
    padding: 40px;
    background: #f7f8fa;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

    .left-panel h1 {
        font-size: 28px;
        color: var(--text-dark);
    }

    .left-panel p {
        font-size: 16px;
        color: var(--text-muted);
        margin: 20px 0;
    }

    .left-panel img {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

.right-panel {
    padding: 40px;
    background-color: #ffffff;
}

.login-panel h2 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.input-box {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
    transition: 0.3s;
}

    .input-box:focus {
        border-color: var(--primary-color);
        outline: none;
        box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
    }

.register-button {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    margin-top: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

    .register-button:hover {
        background-color: var(--primary-dark);
    }

.social-login {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    gap: 10px;
}

.social-btn {
    flex: 1;
    padding: 10px;
    font-size: 14px;
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.fb {
    background-color: #3b5998;
}

    .fb:hover {
        background-color: #2d4373;
    }

.google {
    background-color: #db4437;
}

    .google:hover {
        background-color: #c23321;
    }

.signup-link {
    margin-top: 20px;
    text-align: center;
    font-size: 14px;
}

.message-label {
    padding: 10px;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 10px;
    display: block;
}

    .message-label.error {
        background-color: #ffe6e6;
        color: var(--danger-color);
        border: 1px solid var(--danger-color);
    }

    .message-label.success {
        background-color: #e6ffe6;
        color: var(--success-color);
        border: 1px solid var(--success-color);
    }

/* Responsive */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
        margin: 20px;
    }

    .left-panel, .right-panel {
        padding: 20px;
    }

        .left-panel img {
            max-width: 200px;
        }

    .social-login {
        flex-direction: column;
    }

    .social-btn {
        width: 100%;
    }
}