.container { width: 100%; max-width: var(--content-width); margin-inline: auto; padding-inline: var(--space-4); }
.container--reading { max-width: var(--reading-width); }
.page { padding-block: var(--space-6) var(--space-8); }
.page-header { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: end; justify-content: space-between; margin-block-end: var(--space-5); }
.page-header p { margin: 0; color: var(--color-ink-soft); }
.stack > * + * { margin-block-start: var(--space-4); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.split { display: grid; gap: var(--space-6); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .split { grid-template-columns: minmax(0, 1fr) 20rem; } }
/* Phones: the sidebar's panels join the single column; the controls come before the main text, panels marked
   .split__after (e.g. tags) after it. */
@media (max-width: 899.98px) {
  .split--controls-first { gap: var(--space-4); }
  .split--controls-first > .split__aside { display: contents; }
  .split--controls-first > .split__aside > * { order: -1; margin-block-start: 0; }
  .split--controls-first > .split__aside > .split__after { order: 1; }
}
.grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr)); }

.site-header {
  position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--color-paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--color-line);
}
.site-header__inner { display: flex; align-items: center; gap: var(--space-4); min-height: 3.75rem; }
.brand { display: inline-flex; align-items: center; gap: var(--space-2); font-weight: 700; color: var(--color-ink); text-decoration: none; font-size: 1.05rem; }
.brand__mark { width: 1.9rem; height: 1.9rem; border-radius: 22%; display: block; flex: none; object-fit: cover; }
.site-nav { display: flex; gap: var(--space-1); flex-wrap: wrap; }
.site-nav a { color: var(--color-ink-soft); text-decoration: none; padding: 0.4rem 0.7rem; border-radius: var(--radius-small); font-weight: 500; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--color-ink); background: var(--color-surface-sunken); }
.site-header__end { margin-inline-start: auto; display: flex; gap: var(--space-2); align-items: center; }
.site-search { display: none; }
@media (min-width: 1000px) { .site-search { display: block; } .site-search input { width: 14rem; } }
.button.menu-toggle { display: none; }
@media (max-width: 820px) {
  .site-nav { display: none; position: absolute; inset-inline: 0; top: 100%; background: var(--color-surface); flex-direction: column; padding: var(--space-3); border-bottom: 1px solid var(--color-line); box-shadow: var(--shadow); }
  .site-nav.is-open { display: flex; }
  .button.menu-toggle { display: inline-flex; }
}

.site-footer { border-top: 1px solid var(--color-line); background: var(--color-surface); padding-block: var(--space-6); color: var(--color-ink-soft); font-size: 0.925rem; }
.site-footer__grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); }
.site-footer h2 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-ink-faint); }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-1); }
.site-footer a { color: var(--color-ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--color-ink); text-decoration: underline; }
.site-footer__legal { margin-block-start: var(--space-5); padding-block-start: var(--space-4); border-top: 1px solid var(--color-line); display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: space-between; }