:root {
    --container-width: 800px;
    --common-bg-color: #f1f5f9;
    --common-card-bg: #ffffff;
    --common-accent: #2563eb;
    --common-border: #e2e8f0;
    --common-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    font-family: var(--common-font-family);
}

.container {
    width: 100%;
    max-width: var(--container-width);
}