:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
}

body {
            background-color: #f8f9fa;
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9));
            background-size: cover;
            background-position: center;
        }
        
        .login-container {
            max-width: 400px;
            width: 100%;
            padding: 2rem;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
            animation: fadeIn 0.5s ease-in-out;
        }

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header img {
    height: 80px;
    margin-bottom: 1rem;
}

.login-header h2 {
    color: var(--dark-color);
    font-weight: 600;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
}

.btn-login {
    background-color: var(--primary-color);
    border: none;
    width: 100%;
    padding: 10px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-login:hover {
    background-color: var(--secondary-color);
}

.required-field::after {
    content: " *";
    color: var(--accent-color);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.error-message {
    color: var(--accent-color);
    font-size: 0.9rem;
}

.alert {
    animation: fadeIn 0.3s ease-in-out;
}