body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #2d3748; /* Modern dark background */
    color: #edf2f7; /* Light text color for readability */
}

.login-container {
    max-width: 400px;
    margin: 0 auto;
    background-color: #1a202c; /* Dark background for login card */
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
    padding: 20px;
    color: #edf2f7;
}

.card {
    background-color: #1a202c;
    border: none;
    color: #edf2f7;
}

.card .form-label {
    color: #a0aec0; /* Subtle color for form labels */
}

.form-control {
    background-color: #2d3748;
    color: #edf2f7;
    border: 1px solid #4a5568;
    border-radius: 5px;
}

.form-control:focus {
    border-color: #63b3ed;
    outline: none;
    box-shadow: 0 0 0 2px rgba(99, 179, 237, 0.5);
}

.btn-primary {
    background-color: #3182ce;
    border-color: #3182ce;
    color: #edf2f7;
    border-radius: 5px;
}

.btn-primary:hover {
    background-color: #63b3ed;
    border-color: #63b3ed;
}

.text-danger {
    color: #e53e3e; /* Bright red for error messages */
    font-size: 0.9rem;
    margin-bottom: 10px;
    text-align: center;
}