/* Jake Hamilton — portfolio styles
   Aesthetic: editorial minimalism. Near-white surface, deep neutral ink,
   restrained sky/seafoam accent. Generous whitespace. Real type hierarchy. */

:root {
  /* Surface */
  --bg: #FAFBFC;
  --bg-soft: #F4F5F7;
  --bg-tint: #EFF3F2;
  --line: #E4E7EB;
  --line-soft: #EDEFF2;

  /* Ink */
  --ink: #0E1417;
  --ink-2: #2A3338;
  --ink-3: #5A6670;
  --ink-4: #8A929A;

  /* Accents — restrained pair */
  --accent: #5A8AA8;       /* steel blue */
  --accent-2: #3A6B5C;     /* deep pine */
  --accent-soft: #DCEAF1;
  --accent-soft-2: #DDEBE4;

  /* Type */
  --serif: "Fraunces", "Iowan Old Style", "Charter", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", "Menlo", "Consolas", monospace;

  /* Layout */
  --maxw: 1200px;
  --maxw-prose: 720px;
  --gutter: clamp(20px, 4vw, 48px);
  --radius: 6px;
  --radius-lg: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }

::selection { background: var(--accent-soft); color: var(--ink); }

/* ---------- Container ---------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ---------- Top nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 251, 252, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.nav-mark .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2);
  display: inline-block;
  transform: translateY(-1px);
}
.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--ink-3);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }
@media (max-width: 640px) {
  .nav-links { gap: 18px; }
  .nav-links a:not(.always) { display: none; }
}

/* ---------- Hero v2 — image-forward, long-scroll ---------- */
.hero-v2 {
  padding-top: clamp(56px, 9vw, 112px);
  padding-bottom: clamp(48px, 7vw, 88px);
}
.hero-headline {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 6.6vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 22px 0 0;
  color: var(--ink);
  text-wrap: balance;
  max-width: 16ch;
}
.hero-headline .amp { font-style: italic; color: var(--accent-2); }
.hero-byline {
  margin-top: 22px;
  font-size: 16px;
  color: var(--ink-3);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
}
.hero-byline .sep { color: var(--ink-4); }
.hero-stage {
  margin-top: clamp(40px, 5vw, 64px);
}
.hero-feature {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 0;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg);
  overflow: hidden;
  transition: transform 240ms cubic-bezier(.2,.7,.2,1), box-shadow 240ms ease, border-color 240ms ease;
}
.hero-feature:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 24px 50px -28px rgba(14, 20, 23, 0.22), 0 2px 6px -2px rgba(14, 20, 23, 0.06);
}
.hero-feature-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-soft);
}
.hero-feature-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 700ms cubic-bezier(.2,.7,.2,1);
}
.hero-feature:hover .hero-feature-img img { transform: scale(1.03); }
.hero-feature-meta {
  padding: clamp(28px, 4vw, 48px);
  display: flex; flex-direction: column; justify-content: center;
  gap: 10px;
  border-left: 1px solid var(--line-soft);
}
.hero-feature-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  text-transform: uppercase;
}
.hero-feature-title {
  font-family: var(--serif);
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.hero-feature-sub {
  font-size: 15px;
  color: var(--ink-3);
  line-height: 1.5;
}
.hero-feature-cta {
  margin-top: 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--accent-2);
  display: inline-flex; align-items: center; gap: 6px;
}
.hero-feature-cta .arrow { transition: transform 160ms ease; }
.hero-feature:hover .hero-feature-cta .arrow { transform: translateX(3px); }
@media (max-width: 800px) {
  .hero-feature { grid-template-columns: 1fr; }
  .hero-feature-meta { border-left: 0; border-top: 1px solid var(--line-soft); }
}

/* keep .hero (legacy) just in case anything else still references */
.hero { padding-top: clamp(48px, 8vw, 96px); padding-bottom: clamp(56px, 9vw, 112px); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
@media (max-width: 880px) { .hero-grid { grid-template-columns: 1fr; gap: 36px; } }

/* ---------- About ---------- */
.about-section {
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, transparent, rgba(220, 234, 241, 0.12));
}
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
.about-body {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-2);
  margin: 0 0 16px;
  text-wrap: pretty;
  max-width: 56ch;
}
.about-ctas { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.about-portrait {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-soft);
  aspect-ratio: 4 / 3;
}
.about-portrait img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.95); }
.about-portrait .frame-line { position: absolute; inset: 0; border-radius: var(--radius-lg); box-shadow: inset 0 0 0 1px rgba(14, 20, 23, 0.06); pointer-events: none; }
@media (max-width: 800px) {
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 10px;
  background: var(--accent-soft-2);
  color: var(--accent-2);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.status .pulse {
  position: relative;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2);
}
.status .pulse::after {
  content: "";
  position: absolute; inset: -3px;
  border-radius: 50%;
  background: var(--accent-2);
  opacity: .35;
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse {
  0%   { transform: scale(.6); opacity: .5; }
  80%  { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(1.6); opacity: 0; }
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 6.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 22px 0 0;
  color: var(--ink);
  text-wrap: balance;
}
.hero h1 .amp {
  font-style: italic;
  color: var(--accent-2);
}
.hero .tag {
  margin-top: 18px;
  font-size: 17px;
  color: var(--ink-2);
  max-width: 520px;
  text-wrap: pretty;
}
.hero .tag .sep { color: var(--ink-4); margin: 0 8px; }

.hero .bio {
  margin-top: 28px;
  font-size: 16px;
  color: var(--ink-3);
  line-height: 1.65;
  max-width: 540px;
  text-wrap: pretty;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
}
.btn-primary {
  background: var(--ink);
  color: #FAFBFC;
}
.btn-primary:hover { background: #000; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--ink-3); }
.btn-ghost.disabled {
  color: var(--ink-4);
  cursor: not-allowed;
}
.btn-ghost.disabled:hover { border-color: var(--line); }
.btn .arrow {
  transition: transform 160ms ease;
}
.btn:hover .arrow { transform: translateX(2px); }

/* portrait */
.portrait {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-soft);
  aspect-ratio: 5 / 4;
}
.portrait img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: saturate(.95);
}
.portrait .frame-line {
  position: absolute; inset: 0;
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 1px rgba(14, 20, 23, 0.06);
  pointer-events: none;
}
.portrait .meta {
  position: absolute;
  left: 14px;
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: blur(6px);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

/* ---------- Skim strip ---------- */
.skim {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, transparent, rgba(220, 234, 241, 0.18));
}
.skim-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.skim-item {
  padding: 28px 28px;
  border-right: 1px solid var(--line-soft);
}
.skim-item:last-child { border-right: 0; }
.skim-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.skim-title {
  font-size: 16px;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.skim-title .num {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-right: 4px;
}
.skim-sub {
  margin-top: 4px;
  font-size: 13px;
  color: var(--ink-3);
}
@media (max-width: 880px) {
  .skim-inner { grid-template-columns: repeat(2, 1fr); }
  .skim-item:nth-child(2) { border-right: 0; }
  .skim-item:nth-child(1), .skim-item:nth-child(2) { border-bottom: 1px solid var(--line-soft); }
  .skim-item { padding: 22px 20px; }
}
@media (max-width: 480px) {
  .skim-inner { grid-template-columns: 1fr; }
  .skim-item { border-right: 0 !important; border-bottom: 1px solid var(--line-soft); }
  .skim-item:last-child { border-bottom: 0; }
}

/* ---------- Section header ---------- */
.section {
  padding-top: clamp(72px, 10vw, 128px);
  padding-bottom: clamp(48px, 6vw, 72px);
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.section-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}
.section-sub {
  font-size: 14px;
  color: var(--ink-3);
  max-width: 360px;
  text-wrap: pretty;
}

/* ---------- Filter bar ---------- */
.filters {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink-3);
  font-size: 13px;
  letter-spacing: -0.005em;
  transition: all 140ms ease;
}
.filter-pill:hover { border-color: var(--ink-4); color: var(--ink); }
.filter-pill.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #FAFBFC;
}
.filter-pill .count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-4);
}
.filter-pill.active .count { color: rgba(250, 251, 252, 0.55); }

/* ---------- Project grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(20px, 2.4vw, 32px);
}
@media (max-width: 700px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 240ms cubic-bezier(.2,.7,.2,1),
              box-shadow 240ms ease,
              border-color 240ms ease;
  cursor: pointer;
  text-align: left;
  width: 100%;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 18px 40px -22px rgba(14, 20, 23, 0.18),
              0 2px 6px -2px rgba(14, 20, 23, 0.06);
}
.card-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line-soft);
}
.card-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 600ms cubic-bezier(.2,.7,.2,1);
}
.card:hover .card-thumb img { transform: scale(1.025); }

.card-cat {
  position: absolute;
  top: 14px; left: 14px;
  padding: 4px 10px;
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: blur(6px);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-2);
  text-transform: uppercase;
}
.card-status {
  position: absolute;
  top: 14px; right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: blur(6px);
  border-radius: 999px;
  font-size: 11px;
  color: var(--accent-2);
}
.card-status::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-2);
}

.card-body {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.card-meta .dot {
  width: 3px; height: 3px; background: var(--ink-4); border-radius: 50%;
}
.card h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 6px;
  color: var(--ink);
}
.card .sub {
  font-size: 14px;
  color: var(--ink-3);
  line-height: 1.55;
  margin-bottom: 16px;
  text-wrap: pretty;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.01em;
  color: var(--ink-3);
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  padding: 4px 9px;
  border-radius: 4px;
}
.card-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--ink-3);
}
.card-cta .read {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent-2);
  font-weight: 500;
}
.card:hover .card-cta .read .arrow { transform: translateX(2px); }
.card-cta .arrow { transition: transform 160ms ease; }

/* ---------- Detail page ---------- */
.detail-shell {
  padding-top: 32px;
  padding-bottom: 96px;
}
.crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 36px;
}
.crumb:hover { color: var(--ink); }
.crumb .arrow { transform: rotate(180deg); transition: transform 160ms ease; }
.crumb:hover .arrow { transform: rotate(180deg) translateX(2px); }

.detail-header {
  max-width: 880px;
  margin-bottom: 40px;
}
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.detail-meta .cat {
  color: var(--accent-2);
  text-transform: uppercase;
}
.detail-meta .dot { width: 3px; height: 3px; background: var(--ink-4); border-radius: 50%; }

.detail-header h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(38px, 5.5vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
  color: var(--ink);
  text-wrap: balance;
}
.detail-sub {
  font-size: 19px;
  color: var(--ink-2);
  line-height: 1.5;
  max-width: 720px;
  text-wrap: pretty;
}
.detail-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 20px;
}

.detail-hero {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--bg-soft);
  margin-bottom: 56px;
  border: 1px solid var(--line-soft);
}
.detail-hero img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* spec table block */
.specs-block {
  margin: 28px 0;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 4px 0;
}
.specs-block .specs-title {
  padding: 14px 20px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  text-transform: uppercase;
  border-bottom: 1px solid var(--line-soft);
}
.specs-block dl {
  margin: 0;
  display: grid;
  grid-template-columns: 200px 1fr;
}
.specs-block dt, .specs-block dd {
  padding: 12px 20px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  margin: 0;
}
.specs-block dt {
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
}
.specs-block dd { color: var(--ink); }
.specs-block dt:first-of-type, .specs-block dd:first-of-type { border-top: 0; }
@media (max-width: 600px) {
  .specs-block dl { grid-template-columns: 1fr; }
  .specs-block dd { padding-top: 0; border-top: 0; }
}

/* prose */
.prose {
  max-width: var(--maxw-prose);
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.72;
  color: var(--ink-2);
}
.prose h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 32px;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--ink);
  margin: 56px 0 16px;
}
.prose h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.015em;
  line-height: 1.25;
  color: var(--ink);
  margin: 44px 0 12px;
}
.prose h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 36px 0 12px;
}
.prose p { margin: 0 0 18px; text-wrap: pretty; }
.prose p strong { color: var(--ink); font-weight: 600; }

.prose .figure {
  margin: 32px 0;
}
.prose .figure img {
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: var(--bg-soft);
  width: 100%;
}
.prose .figure figcaption,
.prose .pair-cap {
  display: block;
  margin-top: 10px;
  font-style: italic;
  font-size: 14px;
  color: var(--ink-3);
  text-align: center;
}
.prose .standalone-cap {
  display: block;
  margin: -8px 0 18px;
  font-style: italic;
  font-size: 14px;
  color: var(--ink-3);
}

.prose .pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 32px 0;
}
.prose .pair img {
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: var(--bg-soft);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
@media (max-width: 600px) {
  .prose .pair { grid-template-columns: 1fr; }
}

/* code */
.codeblock {
  margin: 28px 0;
  background: #0E1417;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  position: relative;
}
.codeblock-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: #1A2226;
  border-bottom: 1px solid #2A3338;
  font-family: var(--mono);
  font-size: 11px;
  color: #8A929A;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.codeblock-head .lang { color: var(--accent-soft); }
.codeblock-head .copy {
  font-family: var(--mono);
  font-size: 11px;
  color: #8A929A;
  letter-spacing: 0.04em;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid #2A3338;
  transition: all 140ms ease;
}
.codeblock-head .copy:hover { color: #DCEAF1; border-color: #3A4A50; }
.codeblock pre {
  margin: 0;
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  color: #C5CCD2;
  overflow-x: auto;
  tab-size: 4;
}
.codeblock pre code { color: inherit; font-family: inherit; }

/* simple syntax highlight tokens */
.tok-kw { color: #9EC9B8; }
.tok-fn { color: #B8D6E8; }
.tok-str { color: #E8C8A8; }
.tok-num { color: #D8AECC; }
.tok-com { color: #5A6670; font-style: italic; }
.tok-pp { color: #C8B0DA; }
.tok-typ { color: #DCEAF1; }

/* rules block (FSAE) */
.rules {
  margin: 24px 0;
  border-left: 2px solid var(--accent);
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.rule-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  align-items: start;
}
.rule-id {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-2);
  letter-spacing: 0.02em;
  padding-top: 2px;
}
.rule-text {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.6;
}
@media (max-width: 600px) {
  .rule-row { grid-template-columns: 1fr; gap: 4px; }
}

/* table block */
.tbl-wrap {
  margin: 28px 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow-x: auto;
  background: var(--bg);
}
.tbl-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.tbl-wrap th, .tbl-wrap td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
}
.tbl-wrap th {
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}
.tbl-wrap td { color: var(--ink-2); }
.tbl-wrap tr:last-child td { border-bottom: 0; font-weight: 600; color: var(--ink); }

/* prev/next nav at detail bottom */
.detail-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  border-top: 1px solid var(--line-soft);
  margin-top: 80px;
  padding-top: 32px;
}
.detail-nav-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color 160ms ease, background 160ms ease;
  cursor: pointer;
  text-align: left;
}
.detail-nav-card:hover { border-color: var(--accent); background: var(--bg-soft); }
.detail-nav-card.right { text-align: right; align-items: flex-end; }
.detail-nav-card.disabled { opacity: 0.4; pointer-events: none; }
.detail-nav-card .label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.detail-nav-card .ttl {
  font-family: var(--serif);
  font-size: 19px;
  letter-spacing: -0.015em;
  color: var(--ink);
}
@media (max-width: 600px) {
  .detail-nav { grid-template-columns: 1fr; }
  .detail-nav-card.right { text-align: left; align-items: flex-start; }
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line-soft);
  padding: 40px 0 60px;
  margin-top: 40px;
  font-size: 13px;
  color: var(--ink-3);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-links { display: flex; gap: 22px; }
.footer-links a:hover { color: var(--ink); }

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 600ms ease, transform 600ms cubic-bezier(.2,.7,.2,1);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Tweaks-friendly accent variants ---------- */
[data-accent="seafoam"] {
  --accent: #4F8F7C;
  --accent-2: #2F5E50;
  --accent-soft: #DDEBE4;
  --accent-soft-2: #E5F0EA;
}
[data-accent="sky"] {
  --accent: #5A9CCB;
  --accent-2: #3D6F92;
  --accent-soft: #DCEAF1;
  --accent-soft-2: #E1ECF3;
}
[data-accent="steel"] {
  --accent: #5A8AA8;
  --accent-2: #3A6B5C;
  --accent-soft: #DCEAF1;
  --accent-soft-2: #DDEBE4;
}
[data-accent="pine"] {
  --accent: #3A6B5C;
  --accent-2: #244A3F;
  --accent-soft: #DDEBE4;
  --accent-soft-2: #DCEAF1;
}