.login-container {
    max-width: 500px;
    margin: 3rem auto;
    padding: 2.5rem;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

h2 {
    text-align: center;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-size: 2rem;
}

.description {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #2c3e50;
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: #3498db;
    outline: none;
}

.is-invalid {
    border-color: #e74c3c;
}

.error-message {
    display: block;
    color: #e74c3c;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.error-alert {
    background-color: #f8d7da;
    color: #721c24;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    text-align: center;
}

.btn-login {
    display: block;
    width: 100%;
    padding: 1rem;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-login:hover {
    background-color: #2980b9;
}

a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #2980b9;
}

.register-link {
    color: black;
    text-align: center;
    margin-top: 1.5rem;
}

.password-container {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: #7f8c8d;
    transition: color 0.3s;
}

.toggle-password:hover {
    color: #2c3e50;
}

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

.login-container {
    animation: fadeIn 0.5s ease-out;
}

@media (max-width: 768px) {
    .login-container {
        margin: 2rem 1rem;
        padding: 1.5rem;
    }
}