.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
}

.site-header .brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.site-header nav ul {
    list-style: none;
    display: flex;
    gap: 1rem;
    padding-left: 0;
    margin: 0;
}
.site-header nav a {
    color: var(--color-text-inverted);
    text-decoration: none;
    opacity: 0.9;
}
.site-header nav a:hover,
.site-header nav a:focus {
    opacity: 1;
    text-decoration: underline;
}

.site-header nav a:focus-visible {
    outline: 2px solid var(--color-header-title);
    outline-offset: 2px;
}

.page-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-3);
}

.span-12 { grid-column: span 12; }
.span-8  { grid-column: span 8; }
.span-6  { grid-column: span 6; }
.span-4  { grid-column: span 4; }
.span-3  { grid-column: span 3; }

/* Responsive breakpoints: compress column count */
@media (max-width: 1000px) {
    .page-grid { grid-template-columns: repeat(8, minmax(0, 1fr)); }
    .span-8  { grid-column: span 8; }
    .span-6  { grid-column: span 8; }
    .span-4  { grid-column: span 4; }
    .span-3  { grid-column: span 4; }
}
@media (max-width: 640px) {
    .page-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .span-12,
    .span-8,
    .span-6 { grid-column: span 4; }
    .span-4,
    .span-3 { grid-column: span 4; }
}

/* Card pattern */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--space-3);
}

/* Sequence layouts */
.sequence-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    padding-left: 0;
    list-style: none;
    margin: 0;
}

/* Grid sequence for cards/lists */
.sequence-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
}
@media (max-width: 640px) {
    .sequence-grid { grid-template-columns: 1fr; }
}

.card ul { white-space: normal; }

@media (min-width: 1201px) {
    .card ul { white-space: nowrap; }
}