:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --form-bg-color: #ffffff;
    --text-color: #212529;
    --light-gray: #e9ecef;
    --dark-gray: #343a40;
    --error-color: #dc3545;
    --success-color: #28a745;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

header h1 {
    font-size: 2.5rem;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    color: var(--secondary-color);
}

main {
    width: 100%;
    max-width: 600px;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    header h1 {
        font-size: 2rem;
    }
    header p {
        font-size: 1rem;
    }
}