:root {
    --color-text: #222;
    --color-accent: #1d5c8a;
    --max-width: 72rem;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
}

.site-header,
.site-main,
.site-footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem;
}

.site-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-header__brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
}

.site-nav ul {
    display: flex;
    gap: 1rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav a {
    color: inherit;
    text-decoration: none;
}

.site-nav .is-active a {
    color: var(--color-accent);
    font-weight: 600;
}

.site-footer {
    border-top: 1px solid #ddd;
    font-size: 0.875rem;
}