/* Operations ledger: home-only tokens; legacy pages keep provenance.css. */
:root {
  --surface: #f2f0ea;
  --raised: #fff;
  --ink: #202b29;
  --muted: #4f605c;
  --accent: #28594f;
  --border: #78847d;
  --inverse: #202b29;
  --inverse-ink: #f2f0ea;
  --inverse-muted: #cbd5ce;
  --inverse-border: #98a99f;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;
  --font-label: ui-monospace, "SF Mono", Menlo, monospace;
  --type-body: clamp(1rem, .96rem + .18vw, 1.125rem);
  --type-h3: clamp(1.25rem, 1.17rem + .35vw, 1.40625rem);
  --type-h2: clamp(1.5625rem, 1.2rem + 1.5vw, 2.1973rem);
  --type-h1: clamp(2.4414rem, 1.5rem + 3.8vw, 4.2915rem);
  --space-section: clamp(48px, 6.5vw, 88px);
  --space-card: clamp(24px, 2.5vw, 32px);
  --radius: 2px;
}

/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--type-body);
  line-height: 1.65;
}
a {
  color: var(--accent);
  text-underline-offset: .2em;
  overflow-wrap: anywhere;
}
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, main:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
h1, h2, h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -.025em;
  overflow-wrap: anywhere;
}
h1 { font-size: var(--type-h1); max-inline-size: 19ch; }
h2 { font-size: var(--type-h2); max-inline-size: 28ch; }
h3 { font-size: var(--type-h3); letter-spacing: -.012em; }
p { margin: 16px 0 0; }
section { padding-block: var(--space-section); }
[lang="ko"] { word-break: keep-all; overflow-wrap: normal; }

/* Shared home primitives */
.shell { inline-size: min(100% - 48px, 1040px); margin-inline: auto; }
.label, .tags, .date {
  color: var(--muted);
  font-family: var(--font-label);
  font-size: 1rem;
}
.label { margin: 0 0 16px; letter-spacing: .06em; }
h2.label { font-weight: 400; line-height: 1.65; }
.label::before {
  content: "";
  display: inline-block;
  inline-size: 6px;
  block-size: 6px;
  margin-inline-end: 10px;
  background: var(--accent);
  border-radius: 50%;
  vertical-align: middle;
}
.section-inner {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
}
.section-head { margin: 0; }
.section-head h2:not(.label) { font-size: var(--type-h3); }
.muted { color: var(--muted); }
.links { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-block-start: 20px; }
.links a, .writing-link { display: inline-block; min-block-size: 24px; }

/* Navigation and hero */
.skip-link {
  position: absolute;
  inset-block-start: 8px;
  inset-inline-start: 24px;
  z-index: 1;
  padding: 12px 20px;
  background: var(--raised);
  border: 1px solid var(--accent);
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  padding-block: 24px;
  border-block-end: 1px solid var(--border);
  font-size: 1rem;
}
.nav a {
  display: inline-flex;
  align-items: center;
  min-block-size: 32px;
  color: var(--muted);
  text-decoration: none;
}
.hero {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  column-gap: 56px;
  padding-block: clamp(56px, 8vw, 112px);
}
.hero .label, .hero .actions { grid-column: 1 / -1; }
.lede {
  margin-block: 8px 32px;
  max-inline-size: 65ch;
  font-size: clamp(1.125rem, 1.02rem + .45vw, 1.375rem);
  color: var(--muted);
}
.actions { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; margin-block-start: 32px; }
.actions a { padding-block: 12px; }
.primary {
  display: inline-flex;
  min-block-size: 48px;
  padding: 12px 20px;
  background: var(--accent);
  color: var(--raised);
  border: 1px solid var(--accent);
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
}

/* Work records and approach */
.patterns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { padding: var(--space-card); background: var(--raised); border: 1px solid var(--border); }
.card p, .xp p, .earlier p { color: var(--muted); }
.card:last-child { grid-column: 1 / -1; }
.card:last-child p { max-inline-size: 80ch; }
.tags { margin-block-start: 24px; padding-block-start: 16px; border-block-start: 1px solid var(--border); }
.band { background: var(--inverse); color: var(--inverse-ink); }
.band .label, .band p { color: var(--inverse-muted); }
.band .label::before { background: var(--inverse-ink); }
.principles { display: grid; grid-template-columns: 1fr; gap: 24px; }
.principles article { padding-block-start: 24px; border-block-start: 1px solid var(--inverse-border); }

/* Experience, credentials and secondary work */
.xp {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  padding-block: 24px;
  border-block-end: 1px solid var(--border);
}
.xp h3 { font-family: var(--font-body); font-weight: 600; }
.xp .date { margin: 0; }
.credentials {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  border-block-start: 1px solid var(--border);
}
.credentials section { padding-block-start: 40px; }
.credentials .section-inner { display: block; }
.credentials .section-head { margin-block-end: 16px; }
.credentials p { margin-block-start: 8px; }
.studio {
  padding: 32px;
  background: var(--raised);
  border: 1px solid var(--border);
  border-inline-start: 6px solid var(--accent);
  border-radius: var(--radius);
}
.studio a { display: inline-block; margin-block-start: 16px; }
.experiments { display: grid; grid-template-columns: 1fr; gap: 28px; margin-block: 32px; }
.experiments article { padding-block-start: 20px; border-block-start: 1px solid var(--border); }
.experiments h3 { font-family: var(--font-body); font-size: 1.125rem; font-weight: 600; }
.experiments a { margin: 0; min-block-size: 24px; }
footer {
  padding-block: 32px 48px;
  border-block-start: 1px solid var(--border);
  color: var(--muted);
  font-size: 1rem;
}

@media (max-width: 700px) {
  .shell { inline-size: calc(100% - 40px); }
  .nav { gap: 8px 20px; padding-block: 16px; }
  .hero, .section-inner, .xp { display: block; }
  .hero { padding-block: 56px; }
  .hero .lede { margin-block-start: 24px; }
  .section-head { margin-block-end: 28px; }
  .patterns, .credentials { grid-template-columns: minmax(0, 1fr); }
  .card:last-child { grid-column: auto; }
  .principles { gap: 28px; }
  .xp .date { margin-block-end: 12px; }
  .credentials { gap: 0; }
  .credentials section { padding-block: 32px; }
  .studio { padding: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto; animation: none; transition: none; }
}