/* Hallmark · macrostructure: Index-First · F4 sidebar-toc knobs: width=12rem, sticky=true, numbered=00-04
 * theme: Plain · accent: deep-ink-blue ~2% (used as section-num + one rule)
 * enrichment: none (typography only — restraint is the credibility signal)
 * studied: no · context: skipped, inferred (personal / portfolio domain) · v0.6.0
 */

:root {
  --color-paper: oklch(100% 0 0);
  --color-paper-2: oklch(98% 0.005 240);
  --color-rule: oklch(88% 0.006 240);
  --color-ink: oklch(18% 0.012 245);
  --color-ink-soft: oklch(48% 0.014 245);
  --color-ink-muted: oklch(70% 0.014 245);
  --color-accent: oklch(36% 0.18 248);

  --font-display: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 6.5rem;

  --measure-prose: 60ch;

  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur-micro: 120ms;
}

* { box-sizing: border-box; }
html, body { overflow-x: clip; }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.page {
  display: grid;
  grid-template-columns: 14rem 1fr;
  gap: var(--space-3xl);
  max-width: 76rem;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-3xl);
}

/* Sidebar TOC */
.toc {
  position: sticky;
  top: var(--space-2xl);
  align-self: start;
  height: fit-content;
}

.toc__brand {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin: 0 0 var(--space-3xs);
}

.toc__role {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-xl);
  display: block;
}

.toc__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-xl);
  display: grid;
  gap: var(--space-2xs);
  border-block-start: 1px solid var(--color-rule);
  padding-block-start: var(--space-md);
}

.toc__list a {
  display: grid;
  grid-template-columns: 3.25ch 1fr;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
  text-decoration: none;
  padding: var(--space-3xs) 0;
  transition: color var(--dur-micro) var(--ease-out);
}

.toc__list a:hover, .toc__list a:focus-visible { color: var(--color-accent); }
.toc__list a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.toc__list .num { color: var(--color-accent); }

.toc__meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  border-block-start: 1px solid var(--color-rule);
  padding-block-start: var(--space-sm);
  display: grid;
  gap: var(--space-3xs);
}

/* Main content column */
.main { min-width: 0; max-width: 56rem; }

.section {
  margin-block-end: var(--space-3xl);
  scroll-margin-top: var(--space-2xl);
}

.section:first-of-type { margin-block-start: 0; }

.section__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-md);
}

.section__head {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 var(--space-lg);
  color: var(--color-ink);
}

.section__head--lede { font-size: clamp(2.5rem, 5vw, 4rem); }

.section__body {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-ink);
  max-width: var(--measure-prose);
}

.section__body p { margin: 0 0 var(--space-md); }
.section__body p:last-child { margin-block-end: 0; }
.section__body strong { color: var(--color-accent); font-weight: 500; }

/* Tabular work history */
.years {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}

.years thead th {
  text-align: start;
  padding: var(--space-2xs) var(--space-md) var(--space-2xs) 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  font-weight: 400;
  border-block-end: 1px solid var(--color-rule);
}

.years tbody td {
  padding: var(--space-md) var(--space-md) var(--space-md) 0;
  border-block-end: 1px solid var(--color-rule);
  vertical-align: baseline;
  color: var(--color-ink);
}

.years td:first-child {
  font-family: var(--font-mono);
  color: var(--color-ink-soft);
  width: 12ch;
}

.years td:nth-child(2) {
  font-weight: 500;
  width: 18ch;
}

.years td:last-child { color: var(--color-ink-soft); }

/* Writing list */
.writing {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-md);
}

.writing li {
  display: grid;
  grid-template-columns: 8ch 1fr;
  gap: var(--space-md);
  align-items: baseline;
  border-block-end: 1px solid var(--color-rule);
  padding-block-end: var(--space-md);
}

.writing li:last-child { border-block-end: none; padding-block-end: 0; }

.writing__date {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-ink-soft);
  font-variant-numeric: tabular-nums;
}

.writing a {
  color: var(--color-ink);
  text-decoration: none;
  border-block-end: 1px solid var(--color-rule);
  padding-block-end: 1px;
  transition: color var(--dur-micro) var(--ease-out),
              border-color var(--dur-micro) var(--ease-out);
}

.writing a:hover, .writing a:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.writing a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.writing__sub {
  display: block;
  font-size: 0.875rem;
  color: var(--color-ink-soft);
  margin-block-start: var(--space-3xs);
}

/* Contact */
.contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.contact__row {
  border: 1px solid var(--color-rule);
  padding: var(--space-md);
  display: grid;
  gap: var(--space-2xs);
}

.contact__label { color: var(--color-ink-soft); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; }
.contact__value a { color: var(--color-ink); text-decoration: none; transition: color var(--dur-micro) var(--ease-out); }
.contact__value a:hover, .contact__value a:focus-visible { color: var(--color-accent); }
.contact__value a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

@media (max-width: 64rem) {
  .page { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .toc { position: static; border-block-end: 1px solid var(--color-rule); padding-block-end: var(--space-lg); }
}

@media (max-width: 40rem) {
  .page { padding: var(--space-xl) var(--space-md) var(--space-2xl); }
  .years td:first-child { width: 10ch; }
  .writing li { grid-template-columns: 1fr; }
}