/* ── Writing section — article and index styles ──
   Depends on index.css being loaded first (tokens, nav, footer, fab,
   view transitions, scroll progress bar). */

/* ── Writing index hero ── */
.writing-hero {
  position: relative;
  color: var(--text);
  padding: clamp(5rem, 12vh, 8rem) 2rem clamp(3.5rem, 8vh, 5.5rem);
  text-align: center;
  overflow: clip;
  background:
    radial-gradient(70% 90% at 74% 20%, rgba(61, 99, 192, 0.35), transparent 64%),
    radial-gradient(50% 65% at 16% 85%, rgba(254, 95, 85, 0.08), transparent 60%),
    linear-gradient(150deg, var(--hero-a), var(--hero-b));
  transition: color 0.3s;
}

.writing-hero h1 {
  font-family: var(--font-sans);
  font-size: var(--step-4);
  font-weight: 750;
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
}

.writing-hero h1 em {
  font-style: normal;
  color: var(--coral-text);
}

.writing-hero p {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--muted);
  max-width: 56ch;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Writing index list ── */
.writing-list {
  max-width: 760px;
  margin: 0 auto;
  padding: 4rem 1.5rem 8rem;
  text-align: left;
}

.writing-list .process-note {
  text-align: left;
  padding: 0;
  margin: 0 0 2.5rem;
}

.writing-list .list-heading {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 3.5rem 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.writing-list .list-heading::before {
  content: "// ";
  color: var(--coral);
}

.writing-list .list-heading::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 3rem;
  height: 2px;
  background: linear-gradient(90deg, var(--coral), var(--indigo-bright));
}

.article-card {
  display: block;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: color 0.2s;
}

.article-card:hover .article-title,
.article-card:focus-visible .article-title {
  color: var(--coral);
}

.article-card:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
  border-radius: 4px;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.article-series {
  color: var(--accent);
}

.article-title {
  font-family: var(--font-sans);
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 650;
  letter-spacing: -0.015em;
  color: var(--text);
  margin: 0 0 0.6rem;
  line-height: 1.3;
  transition: color 0.2s;
}

.article-excerpt {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
  max-width: 62ch;
}

/* Index reveals — scroll-driven where supported */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .article-card,
    .writing-list .list-heading {
      animation: rise-in linear both;
      animation-timeline: view(block);
      animation-range: entry 5% entry 40%;
    }
  }
}

/* ── Article page ── */
.article-page {
  max-width: 46rem;
  margin: 0 auto;
  padding: 4rem 1.5rem 8rem;
  color: var(--text);
  text-align: left;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 3rem;
  transition: color 0.2s;
}

.article-back svg {
  width: 14px;
  height: 14px;
}

.article-back:visited {
  color: var(--muted);
}

.article-back:hover,
.article-back:focus-visible {
  color: var(--coral);
}

.article-back:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
  border-radius: 2px;
}

.article-header {
  margin-bottom: 3rem;
}

.article-header .article-meta {
  margin-bottom: 1.25rem;
}

.article-header h1 {
  font-family: var(--font-sans);
  font-size: var(--step-3);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1.5rem;
  color: var(--text);
}

.article-header .article-lede {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  border-left: 3px solid var(--coral);
  padding-left: 1.15rem;
}

/* ── Series disclaimer ── */
.series-disclaimer {
  margin: 0 0 2.5rem;
  padding: 0.9rem 1.1rem;
  background: var(--tint);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--muted);
}

.series-disclaimer p {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.75;
  margin: 0;
  max-width: 100%;
}

.series-disclaimer a {
  font-size: inherit;
  font-weight: inherit;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.series-disclaimer a:visited {
  color: var(--accent);
}

.series-disclaimer a:hover {
  color: var(--coral);
}

.series-disclaimer strong {
  color: var(--text);
  font-weight: 700;
}

/* ── Article body typography — sans measure ~68ch, mono accents ── */
.article-body {
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text);
}

.article-body p {
  font-size: inherit;
  line-height: inherit;
  margin: 0 0 1.5rem;
  max-width: 68ch;
  text-align: left;
  text-wrap: pretty;
}

.article-body h2 {
  font-family: var(--font-sans);
  font-size: var(--step-2);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin: 3.25rem 0 1rem;
  color: var(--text);
  position: relative;
  padding-bottom: 0.6rem;
}

.article-body h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 2.5rem;
  height: 2px;
  background: linear-gradient(90deg, var(--coral), var(--indigo-bright));
}

.article-body h3 {
  font-family: var(--font-sans);
  font-size: var(--step-1);
  font-weight: 650;
  margin: 2.25rem 0 0.75rem;
  color: var(--accent);
}

.article-body strong {
  color: var(--text);
  font-weight: 700;
}

.article-body em {
  font-style: italic;
}

.article-body ul,
.article-body ol {
  max-width: 66ch;
  padding-left: 1.5rem;
  margin: 0 0 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body li::marker {
  color: var(--coral);
}

.article-body blockquote {
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  border-left: 3px solid var(--coral);
  background: var(--tint);
  border-radius: 0 8px 8px 0;
  color: var(--muted);
  font-style: italic;
}

.article-body blockquote p {
  margin: 0;
}

/* ── Article inline links ── */
.article-body a,
.article-header a,
.article-lede a {
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
  font-family: inherit;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  text-underline-offset: 3px;
  transition: color 0.2s, text-decoration-color 0.2s;
}

.article-body a:visited,
.article-header a:visited,
.article-lede a:visited {
  color: var(--accent);
}

.article-body a:hover,
.article-body a:focus-visible,
.article-header a:hover,
.article-lede a:hover {
  color: var(--coral);
  text-decoration-color: color-mix(in srgb, var(--coral) 70%, transparent);
}

.article-body a:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ── Code blocks ── */
.article-body pre {
  background: var(--d-surface);
  border: 1px solid var(--d-border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0 2rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--d-muted);
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--tint);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
  color: var(--accent);
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

/* ── Comparison table ── */
.article-body .comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 2rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  overflow-x: auto;
  display: block;
}

.article-body .comparison-table thead th {
  background: var(--indigo-deep);
  color: var(--d-text);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 2px solid var(--coral);
}

.article-body .comparison-table thead th:first-child {
  border-radius: 8px 0 0 0;
}

.article-body .comparison-table thead th:last-child {
  border-radius: 0 8px 0 0;
}

.article-body .comparison-table tbody tr {
  border-bottom: 1px solid var(--border);
}

.article-body .comparison-table tbody tr:last-child {
  border-bottom: none;
}

.article-body .comparison-table tbody tr:nth-child(even) {
  background: var(--tint);
}

.article-body .comparison-table td {
  padding: 0.7rem 1rem;
  color: var(--muted);
  line-height: 1.5;
  vertical-align: top;
}

.article-body .comparison-table td:first-child {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.article-body .comparison-table td.highlight {
  color: var(--accent);
}

/* ── Article footer / series note ── */
.article-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

.article-footer a {
  color: var(--accent);
  font-size: 0.8rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-footer a:hover {
  color: var(--coral);
}

/* ── Closing callout ── */
.article-closing {
  margin: 3rem 0 2rem;
  padding: 1.5rem 1.75rem;
  border-left: 4px solid var(--coral);
  background: var(--tint);
  border-radius: 0 10px 10px 0;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.55;
  text-wrap: balance;
}

/* ── Diagrams / figures ── */
.article-figure {
  margin: 2.5rem 0 2rem;
  text-align: center;
  background: var(--tint);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1rem 0.85rem;
}

.article-figure img {
  width: 100%;
  max-width: 100%;
  border-radius: 6px;
  display: block;
}

.article-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
  margin-top: 0.75rem;
  line-height: 1.6;
}

.article-figure figcaption::before {
  content: "fig. ";
  color: var(--coral);
}

/* Article body reveals */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .article-body h2,
    .article-figure,
    .article-closing {
      animation: rise-in linear both;
      animation-timeline: view(block);
      animation-range: entry 5% entry 35%;
    }
  }
}

/* ── Responsive ── */
@media (min-width: 768px) {
  .article-page {
    padding: 5rem 2rem 10rem;
  }

  .writing-list {
    padding: 5rem 2rem 10rem;
  }
}

@media (min-width: 1024px) {
  .writing-list {
    padding: 6rem 0 10rem;
  }
}