/* ABOUTME: Primary "Reading Room" theme for An Oliphant Never Forgets — warm, calm, reading-first. */
/* ABOUTME: Light-first with a warm-charcoal dark mode; the terminal aesthetic lives only in terminal-egg.css. */

/* ===== TOKENS ===== */
:root {
  /* Surfaces */
  --paper: oklch(0.985 0.008 80);
  --paper-2: oklch(0.967 0.010 78);
  --paper-3: oklch(0.945 0.012 76);
  --hairline: oklch(0.90 0.010 75);

  /* Ink */
  --ink: oklch(0.26 0.014 55);
  --muted: oklch(0.47 0.012 58);

  /* Brand */
  --claret: oklch(0.47 0.142 26);
  --claret-deep: oklch(0.40 0.150 27);
  --claret-tint: oklch(0.955 0.028 30);

  /* Garden semantics */
  --leaf: oklch(0.50 0.10 145);     /* seedling */
  --gold: oklch(0.52 0.10 72);      /* budding / growing */
  --pine: oklch(0.43 0.085 152);    /* evergreen */
  --leaf-tint: oklch(0.95 0.04 145);
  --gold-tint: oklch(0.95 0.045 80);
  --pine-tint: oklch(0.95 0.035 155);

  /* Type */
  --font-serif: 'Literata', Georgia, 'Times New Roman', serif;
  --font-sans: 'Hanken Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

  /* Rhythm */
  --measure: 68ch;
  --container: 50rem;
  --container-narrow: 42rem;
  --radius: 10px;
  --radius-sm: 6px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);

  /* Code syntax (warm light) */
  --syntax-keyword: oklch(0.47 0.142 26);
  --syntax-string: oklch(0.46 0.085 152);
  --syntax-function: oklch(0.45 0.10 230);
  --syntax-comment: oklch(0.58 0.012 60);
  --syntax-number: oklch(0.52 0.10 72);
  --syntax-text: var(--ink);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: oklch(0.205 0.012 60);
    --paper-2: oklch(0.245 0.014 60);
    --paper-3: oklch(0.285 0.016 60);
    --hairline: oklch(0.34 0.012 60);

    --ink: oklch(0.92 0.012 80);
    --muted: oklch(0.72 0.012 75);

    --claret: oklch(0.74 0.13 35);
    --claret-deep: oklch(0.82 0.12 40);
    --claret-tint: oklch(0.30 0.05 30);

    --leaf: oklch(0.74 0.12 145);
    --gold: oklch(0.78 0.11 80);
    --pine: oklch(0.72 0.10 155);
    --leaf-tint: oklch(0.30 0.04 145);
    --gold-tint: oklch(0.31 0.045 80);
    --pine-tint: oklch(0.30 0.035 155);

    --syntax-keyword: oklch(0.78 0.12 30);
    --syntax-string: oklch(0.75 0.11 152);
    --syntax-function: oklch(0.72 0.10 230);
    --syntax-comment: oklch(0.60 0.012 60);
    --syntax-number: oklch(0.80 0.11 80);

    color-scheme: dark;
  }
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

img { max-width: 100%; height: auto; }

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 4vw, 2rem);
}

.page {
  flex: 1 0 auto;
  padding-block: clamp(1.75rem, 5vw, 3rem);
}

/* ===== HEADER ===== */
.site-header {
  border-bottom: 1px solid var(--hairline);
  background: var(--paper);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: clamp(1.1rem, 3vw, 1.6rem);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6ch;
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 1rem + 0.9vw, 1.45rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark:hover { color: var(--claret); }
.wordmark__mark { color: var(--claret); flex: none; line-height: 0; }
.wordmark__sub {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--muted);
  margin-top: 0.15rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1.15rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding-block: 0.2rem;
  border-bottom: 2px solid transparent;
  transition: color 0.18s var(--ease-out), border-color 0.18s var(--ease-out);
}
.site-nav a:hover { color: var(--ink); }
.site-nav a.active { color: var(--claret); border-bottom-color: var(--claret); }

/* ===== FOOTER ===== */
.site-footer {
  flex: none;
  border-top: 1px solid var(--hairline);
  margin-top: clamp(3rem, 8vw, 5rem);
  padding-block: 2rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--muted);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}
.site-footer a { color: var(--muted); text-decoration: none; border-bottom: 1px solid transparent; }
.site-footer a:hover { color: var(--claret); border-bottom-color: currentColor; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.1rem; align-items: center; }
.term-launch {
  display: inline-flex;
  align-items: center;
  gap: 0.5ch;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  cursor: pointer;
  background: none;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  color: var(--muted);
  padding: 0.25rem 0.6rem;
  transition: color 0.18s var(--ease-out), border-color 0.18s var(--ease-out);
}
.term-launch:hover { color: var(--claret); border-color: var(--claret); }
.term-launch .blink { color: var(--leaf); }

/* ===== LINKS (prose + general) ===== */
a { color: var(--claret); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--claret-deep); }

/* ===== HEADINGS ===== */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.018em;
  color: var(--ink);
  text-wrap: balance;
}

/* ===== HOMEPAGE INTRO ===== */
.intro {
  max-width: var(--measure);
  margin-bottom: clamp(2rem, 5vw, 3rem);
}
.intro h1 {
  font-size: clamp(1.9rem, 1.4rem + 2.2vw, 3rem);
  margin-bottom: 0.75rem;
}
.intro p {
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: 0.6rem;
}
.intro .muted { color: var(--muted); font-size: 1.05rem; }
.intro__meta {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  margin-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  align-items: center;
}

/* ===== SECTION HEADS ===== */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--hairline);
}
.section-head h2 { font-size: 1.35rem; }
.section-head a {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--muted);
  text-decoration: none;
}
.section-head a:hover { color: var(--claret); }

.lede {
  max-width: var(--measure);
  color: var(--muted);
  font-size: 1.08rem;
  margin-bottom: 1.5rem;
}

/* ===== POST LIST ===== */
.post-list { list-style: none; }
.post-item { padding: 1.25rem 0; border-bottom: 1px solid var(--hairline); }
.post-item:last-child { border-bottom: none; }

.post-item__title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.012em;
  margin-bottom: 0.4rem;
}
.post-item__title a { color: var(--ink); text-decoration: none; }
.post-item__title a:hover { color: var(--claret); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }

.post-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.8rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.post-item__excerpt { color: var(--muted); max-width: var(--measure); margin-bottom: 0.5rem; }
.post-item__external { font-size: 0.85em; color: var(--muted); }

/* ===== TYPE CHIP ===== */
.chip {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  color: var(--muted);
  white-space: nowrap;
}
.chip--note { color: var(--claret); border-color: color-mix(in oklab, var(--claret) 35%, var(--hairline)); }
.chip--til { color: var(--gold); border-color: color-mix(in oklab, var(--gold) 40%, var(--hairline)); }
.chip--link { color: var(--pine); border-color: color-mix(in oklab, var(--pine) 40%, var(--hairline)); }
.chip--guide { color: var(--leaf); border-color: color-mix(in oklab, var(--leaf) 40%, var(--hairline)); }

/* ===== GROWTH PILL ===== */
.growth-stage {
  display: inline-flex;
  align-items: center;
  gap: 0.4ch;
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  white-space: nowrap;
}
.growth-stage::before { content: '🌱'; font-size: 0.85em; }
.growth-seedling { color: var(--leaf); background: var(--leaf-tint); }
.growth-budding, .growth-growing { color: var(--gold); background: var(--gold-tint); }
.growth-budding::before, .growth-growing::before { content: '🌿'; }
.growth-evergreen { color: var(--pine); background: var(--pine-tint); }
.growth-evergreen::before { content: '🌲'; }
.growth-draft { color: var(--muted); background: var(--paper-3); }
.growth-draft::before { content: '✎'; }

/* ===== TAGS ===== */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem 0.65rem; align-items: baseline; }
.tag {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
}
.tag::before { content: '#'; color: color-mix(in oklab, var(--muted) 60%, transparent); }
.tag:hover { color: var(--claret); }

/* ===== TAG CLOUD (topics) ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.5rem 0.8rem; margin: 0.75rem 0 1.5rem; }
.tag-cloud .tag {
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
}
.tag-cloud .tag:hover { border-color: var(--claret); }
.tag-count { color: color-mix(in oklab, var(--muted) 70%, transparent); }

/* ===== ARTICLE ===== */
.article { max-width: var(--measure); }
.article-header { margin-bottom: 1.75rem; }
.article-header h1 {
  font-size: clamp(1.9rem, 1.4rem + 2.4vw, 3rem);
  margin-bottom: 0.7rem;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.9rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--muted);
}
.article-header .tags { margin-top: 0.9rem; }
.breadcrumb { margin-bottom: 1.5rem; }

/* ===== PROSE ===== */
.prose { font-size: 1.125rem; line-height: 1.75; }
.prose > * + * { margin-top: 1.15rem; }
.prose p { text-wrap: pretty; }
.prose h1, .prose h2, .prose h3, .prose h4 { margin-top: 2.25rem; }
.prose h2 { font-size: 1.5rem; padding-bottom: 0.3rem; border-bottom: 1px solid var(--hairline); }
.prose h3 { font-size: 1.25rem; }
.prose h4 { font-size: 1.08rem; }
.prose a { color: var(--claret); }
.prose a:hover { color: var(--claret-deep); }
.prose strong { font-weight: 600; color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.5rem; }
.prose li { margin-top: 0.4rem; }
.prose li::marker { color: var(--claret); }
.prose img { border-radius: var(--radius); margin-block: 1.5rem; }
.prose hr { border: none; border-top: 1px solid var(--hairline); margin-block: 2.25rem; }

.prose blockquote {
  border-left: 3px solid color-mix(in oklab, var(--claret) 55%, var(--hairline));
  padding: 0.25rem 0 0.25rem 1.15rem;
  margin-left: 0;
  color: var(--muted);
  font-style: italic;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.4em;
  color: var(--claret-deep);
}
.prose pre {
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  overflow-x: auto;
}
.prose pre code { background: none; border: none; padding: 0; color: var(--ink); font-size: 0.92em; }

/* ===== TABLE OF CONTENTS ===== */
.prose .toc-container {
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  margin-block: 1.5rem;
}
.prose .toc-summary {
  cursor: pointer;
  padding: 0.65rem 1rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink);
  list-style: none;
}
.prose .toc-summary::-webkit-details-marker { display: none; }
.prose .toc-summary::before { content: '▸ '; color: var(--claret); }
.prose .toc-details[open] > .toc-summary::before { content: '▾ '; }
.prose .toc { padding: 0 1rem 0.85rem; border-top: 1px solid var(--hairline); font-family: var(--font-sans); font-size: 0.92rem; }
.prose .toc ul { list-style: none; padding-left: 0; margin-top: 0.5rem; }
.prose .toc ul ul { padding-left: 1.25rem; }
.prose .toc li { margin-top: 0.2rem; }
.prose .toc a { color: var(--muted); text-decoration: none; }
.prose .toc a:hover { color: var(--claret); }

/* ===== ADMONITIONS ===== */
.prose .admonition {
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0.85rem 1.1rem;
  margin-block: 1.5rem;
}
.prose .admonition > * + * { margin-top: 0.5rem; }
.prose .admonition-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gold);
}
.prose .admonition.note { border-left-color: var(--pine); }
.prose .admonition.note .admonition-title { color: var(--pine); }
.prose .admonition.warning { border-left-color: var(--claret); }
.prose .admonition.warning .admonition-title { color: var(--claret); }

/* ===== CALLOUT / SUBSECTIONS ===== */
.callout {
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  margin-top: 1.5rem;
}
.callout h2, .callout h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }

.subtle-section {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--hairline);
}
.subtle-section h2 { font-size: 1.15rem; margin-bottom: 0.75rem; }
.linklist { list-style: none; }
.linklist li { padding: 0.3rem 0; }
.linklist li::before { content: '↳ '; color: var(--muted); }

/* ===== BUTTONS ===== */
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5ch;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--claret);
  color: oklch(0.99 0.005 80);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s var(--ease-out), transform 0.18s var(--ease-out);
}
.button:hover { background: var(--claret-deep); color: oklch(0.99 0.005 80); }
.button:active { transform: translateY(1px); }
.button--ghost { background: transparent; color: var(--claret); border-color: var(--hairline); }
.button--ghost:hover { background: var(--claret-tint); color: var(--claret-deep); border-color: var(--claret); }

/* ===== PAGINATION ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-sans);
  font-size: 0.92rem;
}
.page-link { color: var(--claret); text-decoration: none; }
.page-link:hover { color: var(--claret-deep); }
.page-link.disabled { color: color-mix(in oklab, var(--muted) 55%, transparent); pointer-events: none; }
.page-info { color: var(--muted); }

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: clamp(2rem, 6vw, 4rem) 1rem;
  color: var(--muted);
  max-width: 34rem;
  margin-inline: auto;
}
.empty-state__icon { font-size: 2.25rem; }
.empty-state h2 { margin: 0.5rem 0; color: var(--ink); }

/* ===== DIRECTORY / QUICK LINKS ===== */
.quicklinks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}
.quicklink {
  display: block;
  padding: 0.85rem 1rem;
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-sans);
  transition: border-color 0.18s var(--ease-out), background 0.18s var(--ease-out);
}
.quicklink:hover { border-color: var(--claret); background: var(--claret-tint); color: var(--claret-deep); }
.quicklink small { display: block; color: var(--muted); font-size: 0.82rem; margin-top: 0.15rem; }

/* ===== LEGEND ===== */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--muted);
}
.legend span { display: inline-flex; align-items: center; gap: 0.5ch; }

/* ===== TOPIC GROUPS ===== */
.topic-group { margin-top: 1.75rem; }
.topic-group__head {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  display: flex;
  align-items: baseline;
  gap: 0.5ch;
}
.topic-group__count { font-family: var(--font-sans); font-size: 0.85rem; color: var(--muted); font-weight: 400; }

/* ===== SYNTAX HIGHLIGHTING (Pygments / codehilite) ===== */
.codehilite {
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9em;
  line-height: 1.65;
  padding: 1rem 1.15rem;
  margin-block: 1.5rem;
}
.codehilite .k, .codehilite .kd, .codehilite .kp, .codehilite .kr, .codehilite .kt,
.codehilite .gh, .codehilite .gu { color: var(--syntax-keyword); }
.codehilite .kn, .codehilite .o, .codehilite .ow, .codehilite .nt, .codehilite .gd { color: var(--syntax-keyword); }
.codehilite .nf, .codehilite .nc, .codehilite .na, .codehilite .gi { color: var(--syntax-function); }
.codehilite .nb, .codehilite .nx, .codehilite .nn, .codehilite .nv, .codehilite .p { color: var(--syntax-text); }
.codehilite .s, .codehilite .s1, .codehilite .s2, .codehilite .sd, .codehilite .sh, .codehilite .si, .codehilite .sx { color: var(--syntax-string); }
.codehilite .c, .codehilite .c1, .codehilite .cm, .codehilite .cs { color: var(--syntax-comment); font-style: italic; }
.codehilite .m, .codehilite .mi, .codehilite .mf, .codehilite .mh, .codehilite .mo, .codehilite .se { color: var(--syntax-number); }

/* ===== ACCESSIBILITY ===== */
.skip-link {
  position: absolute;
  top: -48px;
  left: 0.5rem;
  background: var(--claret);
  color: oklch(0.99 0.005 80);
  padding: 0.5rem 1rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: 100;
  text-decoration: none;
  font-family: var(--font-sans);
  transition: top 0.18s var(--ease-out);
}
.skip-link:focus { top: 0; }

:focus-visible { outline: 2px solid var(--claret); outline-offset: 2px; border-radius: 2px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

::selection { background: var(--claret-tint); color: var(--claret-deep); }

/* ===== REVEAL MOTION =====
   Content is visible by default. Only once JS adds .reveal-ready do we hide-then-reveal,
   so no-JS / headless / reduced-motion always see content. */
.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal-ready [data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal], .reveal-ready [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
  * { scroll-behavior: auto !important; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  body { font-size: 1rem; }
  .site-header__inner { flex-direction: column; align-items: flex-start; }
  .post-item__title { font-size: 1.18rem; }
  .pagination { flex-wrap: wrap; }
}