/*
 * Chrome for prebuilt article pages. Colors come from the article template's own
 * tokens (--page-bg, --text-color, --muted-color), so the header and footer sit
 * flush with the page in both themes instead of importing the site's cream
 * palette. Lengths are px rather than rem because each article template sets its
 * own root font-size.
 */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:opsz,wght@9..40,400..600&family=IBM+Plex+Mono:wght@400;500&display=swap');

@font-face {
  font-family: 'Nasalization';
  src:
    url('/fonts/nasalization.woff2') format('woff2'),
    url('/fonts/Nasalization.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

.sl-chrome,
.sl-footer {
  --sl-bg: var(--page-bg, #fff);
  --sl-fg: var(--text-color, rgba(0, 0, 0, 0.85));
  --sl-muted: var(--muted-color, rgba(0, 0, 0, 0.6));
  --sl-hover: color-mix(in srgb, var(--sl-fg) 6%, transparent);
  --sl-active: color-mix(in srgb, var(--sl-fg) 11%, transparent);
}

:root {
  --sl-header-h: 44px;
}

html {
  scroll-padding-top: calc(var(--sl-header-h) + 8px);
}

/* The article template pins its own toggle to the top-left of the page and lets
   it scroll away. The shared header owns that control now. */
#theme-toggle {
  display: none !important;
}

/* Article TOC is sticky at 32px; keep it clear of the header. */
.table-of-contents {
  top: calc(32px + var(--sl-header-h)) !important;
}

.sl-chrome {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  /* Same recipe as the site nav (bg-paper/30 + backdrop-blur-md), tinted from
     the article's own background so it reads white here and dark in dark mode. */
  background: color-mix(in srgb, var(--sl-bg) 30%, transparent);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  font-family: 'DM Sans', system-ui, sans-serif;
  line-height: 1.65;
  color: var(--sl-fg);
}

.sl-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 784px;
  margin: 0 auto;
  padding: 10px 21px;
}

.sl-brand {
  font-family: 'Nasalization', system-ui, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--sl-fg);
  text-decoration: none;
  white-space: nowrap;
}

.sl-tabs {
  display: none;
  align-items: center;
  gap: 4px;
}

.sl-tab {
  border-radius: 6px;
  padding: 5px 11px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--sl-muted);
  text-decoration: none;
  transition:
    color 0.15s,
    background-color 0.15s;
}

.sl-tab:hover {
  color: var(--sl-fg);
  background: var(--sl-hover);
}

.sl-tab[aria-current='page'] {
  color: var(--sl-fg);
  background: var(--sl-active);
}

.sl-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--sl-fg);
  cursor: pointer;
  transition: background-color 0.15s;
}

.sl-icon-btn:hover {
  background: var(--sl-hover);
}

.sl-icon-btn svg {
  width: 16px;
  height: 16px;
}

.sl-theme .sl-moon,
[data-theme='dark'] .sl-theme .sl-sun {
  display: none;
}

[data-theme='dark'] .sl-theme .sl-moon {
  display: block;
}

.sl-mobile {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sl-menu {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: 6px 21px 12px;
  background: var(--sl-bg);
}

.sl-menu[data-open='1'] {
  display: flex;
}

.sl-menu .sl-tab {
  padding: 8px 11px;
  font-size: 13px;
}

@media (min-width: 768px) {
  .sl-tabs {
    display: flex;
  }

  .sl-mobile,
  .sl-menu[data-open='1'] {
    display: none;
  }
}

.sl-footer {
  width: 100%;
  background: var(--sl-bg);
  padding: 24px 0 32px;
  color: var(--sl-muted);
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
}

.sl-footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  max-width: 784px;
  margin: 0 auto;
  padding: 0 21px;
}

.sl-footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sl-footer a,
.sl-footer span {
  font-size: 11px;
  color: inherit;
  text-decoration: none;
  transition: color 0.15s;
}

.sl-footer a:hover {
  color: var(--sl-fg);
}

@media (min-width: 640px) {
  .sl-footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* Copy button added to the article's BibTeX block. The citation block is a grid,
   so the button has to opt out of stretching to the full column. */
.sl-copy-btn {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  align-self: start;
  width: fit-content;
  gap: 6px;
  margin-bottom: 6px;
  padding: 4px 10px;
  border: 1px solid var(--border-color, rgba(0, 0, 0, 0.1));
  border-radius: 6px;
  background: transparent;
  color: var(--muted-color, rgba(0, 0, 0, 0.6));
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  cursor: pointer;
  transition:
    color 0.15s,
    background-color 0.15s;
}

.sl-copy-btn:hover {
  color: var(--text-color, rgba(0, 0, 0, 0.85));
  background: color-mix(in srgb, currentColor 6%, transparent);
}

.sl-copy-btn[data-copied='1'] {
  color: var(--success-color, #4aa651);
  border-color: var(--success-color, #4aa651);
}

@media print {
  .sl-chrome,
  .sl-footer,
  .sl-copy-btn {
    display: none !important;
  }
}