/* ---------------------------------------------------------------------------
   Site-author styles, layered over Wowchemy v5.

   Scope: typography rhythm, reading measure, publication-list density, and the
   browser surfaces the theme leaves at their defaults (selection, caret, focus
   ring, scrollbar). Structure and layout stay with the theme.

   Palette comes from data/themes/stacchio.toml; the tokens below mirror it so
   custom rules stay in step with it.
   --------------------------------------------------------------------------- */

:root {
  --ls-accent: #4338ca;
  --ls-accent-soft: rgba(67, 56, 202, 0.1);
  --ls-ink: #15161d;
  --ls-muted: #5a5e70;
  --ls-rule: rgba(21, 22, 29, 0.1);
  --ls-measure: 68ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ls-accent: #a5b4fc;
    --ls-accent-soft: rgba(165, 180, 252, 0.16);
    --ls-ink: #f2f3f7;
    --ls-muted: #a3a8bb;
    --ls-rule: rgba(242, 243, 247, 0.14);
  }
}

/* Wowchemy sets an explicit theme via this attribute; keep tokens aligned with
   it so an explicit choice beats the OS preference in both directions. */
html[data-theme='dark'] {
  --ls-accent: #a5b4fc;
  --ls-accent-soft: rgba(165, 180, 252, 0.16);
  --ls-ink: #f2f3f7;
  --ls-muted: #a3a8bb;
  --ls-rule: rgba(242, 243, 247, 0.14);
}

html[data-theme='light'] {
  --ls-accent: #4338ca;
  --ls-accent-soft: rgba(67, 56, 202, 0.1);
  --ls-ink: #15161d;
  --ls-muted: #5a5e70;
  --ls-rule: rgba(21, 22, 29, 0.1);
}

/* --- Typography ---------------------------------------------------------- */

body {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
.section-heading,
.article-title {
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.section-heading {
  font-weight: 600;
}

/* Long-form prose wants a bounded measure; dense lists and grids do not. */
.wg-about-biography .article-style p,
.article-style > p,
.article-style > ul,
.article-style > ol {
  max-width: var(--ls-measure);
}

/* Numerals in citations, dates and volumes should align in a column. */
.pub-list-item,
.article-metadata,
.publication-cite,
time {
  font-variant-numeric: tabular-nums;
}

/* --- Links --------------------------------------------------------------- */

.article-style a:not(.btn),
.wg-about-biography a:not(.btn) {
  text-underline-offset: 0.18em;
  text-decoration-thickness: 0.06em;
  transition: color 0.18s ease, text-decoration-color 0.18s ease;
}

/* --- Publication list ---------------------------------------------------- */

.pub-list-item {
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--ls-rule);
  transition: background-color 0.18s ease;
}

.pub-list-item:last-child {
  border-bottom: 0;
}

.pub-list-item:hover {
  background-color: var(--ls-accent-soft);
}

.pub-list-item .article-title {
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: 0.2rem;
}

.pub-list-item .article-metadata,
.pub-list-item .article-metadata a {
  color: var(--ls-muted);
  font-size: 0.9rem;
}

/* The citation-view icon row reads as controls, so give it real affordance. */
.pub-icon {
  color: var(--ls-muted);
  transition: color 0.18s ease, transform 0.18s ease;
}

a:hover > .pub-icon,
.pub-list-item a:hover .pub-icon {
  color: var(--ls-accent);
}

/* --- Avatar -------------------------------------------------------------- */

.avatar-circle {
  box-shadow: 0 12px 32px -12px rgba(21, 22, 29, 0.45);
}

/* --- Browser surfaces ---------------------------------------------------- */

::selection {
  background-color: var(--ls-accent);
  color: #fff;
}

html[data-theme='dark'] ::selection,
:root:not([data-theme='light']) ::selection {
  color: #0e0f15;
}

html {
  caret-color: var(--ls-accent);
  scrollbar-color: var(--ls-muted) transparent;
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--ls-muted);
  border: 3px solid transparent;
  border-radius: 999px;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--ls-accent);
}

/* A visible, consistent keyboard focus ring - the theme relies on the UA one. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--ls-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --- Embedded PDF viewer ------------------------------------------------- */

.pdf-embed {
  margin: 0 0 2rem;
}

.pdf-embed__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.pdf-embed__label {
  font-weight: 600;
  color: var(--ls-muted);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.pdf-embed__actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pdf-embed__frame {
  display: block;
  width: 100%;
  /* Tall enough to read a page without the viewport fighting the page scroll. */
  height: min(82vh, 1150px);
  border: 1px solid var(--ls-rule);
  border-radius: 6px;
  /* A PDF page is white; keep the letterbox white in dark mode too so the
     document does not sit on a mismatched ground. */
  background-color: #fff;
}

.pdf-embed__fallback,
.pdf-embed__small {
  padding: 2.5rem 1.5rem;
  text-align: center;
  border: 1px solid var(--ls-rule);
  border-radius: 6px;
}

/* Shown only where the inline preview is not trustworthy. */
.pdf-embed__small {
  display: none;
}

@media (max-width: 767.98px) {
  .pdf-embed__frame {
    display: none;
  }

  .pdf-embed__small {
    display: block;
  }
}

/* --- Motion ------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- Print --------------------------------------------------------------- */

@media print {
  .pub-list-item {
    break-inside: avoid;
    border-bottom: 1px solid #ddd;
  }
}