/* FaberSEP site styles. Shared by fabersep.com and fabersep.dev; keep both copies identical. */

@font-face { font-family: "Newsreader"; src: url("fonts/newsreader-wght-normal.woff2") format("woff2"); font-weight: 200 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Newsreader"; src: url("fonts/newsreader-wght-italic.woff2") format("woff2"); font-weight: 200 800; font-style: italic; font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; src: url("fonts/plex-sans-wght-normal.woff2") format("woff2"); font-weight: 100 700; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/plex-mono-400.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/plex-mono-500.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }

:root {
  --paper: #f2efe7;
  --panel: #e8e3d7;
  --ink: #17150f;
  --ink-2: #474237;
  --ink-3: #6b6457;
  --rule: #d3ccbc;
  --rule-strong: #17150f;
  --accent: #b23c17;
  --on-accent: #fff9f2;
  --grid: rgba(23, 21, 15, 0.055);
  --inverse-bg: #17150f;
  --inverse-ink: #f2efe7;
  --inverse-ink-2: #b9b1a1;
  --inverse-rule: #3a352c;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --max: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12110d;
    --panel: #1c1a15;
    --ink: #ece6d8;
    --ink-2: #bdb5a4;
    --ink-3: #8f8776;
    --rule: #343028;
    --rule-strong: #ece6d8;
    --accent: #e8703f;
    --on-accent: #140c07;
    --grid: rgba(236, 230, 216, 0.04);
    --inverse-bg: #ece6d8;
    --inverse-ink: #17150f;
    --inverse-ink-2: #4a4539;
    --inverse-rule: #cfc7b6;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
::selection { background: var(--accent); color: var(--on-accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
img, svg { display: block; max-width: 100%; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -9999px; top: 12px; padding: 8px 12px; background: var(--ink); color: var(--paper); z-index: 100; }
.skip:focus { left: 12px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: var(--paper); border-bottom: 1px solid var(--rule); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 64px; }
.wordmark { display: inline-flex; align-items: baseline; gap: 0.08em; font-family: var(--serif); font-size: 1.5rem; letter-spacing: -0.01em; text-decoration: none; color: var(--ink); }
.wordmark:hover { color: var(--ink); }
.wordmark .sep { font-family: var(--mono); font-size: 0.6em; font-weight: 500; letter-spacing: 0.06em; color: var(--accent); }
.wordmark .tld { margin-left: 0.5em; font-family: var(--mono); font-size: 0.5em; color: var(--ink-3); letter-spacing: 0.04em; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a:not(.btn) { font-size: 0.9375rem; color: var(--ink-2); text-decoration: none; }
.nav a:not(.btn):hover { color: var(--ink); text-decoration: underline; }
@media (max-width: 960px) { .nav a:not(.btn) { display: none; } }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 0.7em; padding: 0.85em 1.25em; border: 1px solid var(--ink); font-family: var(--sans); font-size: 0.9375rem; font-weight: 500; line-height: 1; text-decoration: none; transition: background-color 0.15s, color 0.15s, border-color 0.15s; }
.btn .arrow { font-family: var(--mono); font-weight: 400; transition: transform 0.15s; }
.btn:hover .arrow { transform: translateX(3px); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-accent { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-accent:hover { background: var(--inverse-ink); border-color: var(--inverse-ink); color: var(--inverse-bg); }
.btn-sm { padding: 0.6em 0.95em; font-size: 0.875rem; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Type */
.label { font-family: var(--mono); font-size: 0.75rem; font-weight: 400; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin: 0; }
.label .num { color: var(--accent); }
.display { margin: 20px 0 28px; font-family: var(--serif); font-size: clamp(2.6rem, 6.4vw, 5.4rem); font-weight: 380; line-height: 1.0; letter-spacing: -0.025em; text-wrap: balance; }
.display em, h2 em { font-style: italic; font-weight: 360; color: var(--accent); }
h2 { margin: 0 0 20px; max-width: 22ch; font-family: var(--serif); font-size: clamp(1.9rem, 3.6vw, 3rem); font-weight: 400; line-height: 1.08; letter-spacing: -0.02em; text-wrap: balance; }
h3 { margin: 0; font-family: var(--serif); font-weight: 400; line-height: 1.2; }
.lead { max-width: 40em; margin: 0 0 36px; font-size: clamp(1.0625rem, 1.6vw, 1.25rem); line-height: 1.55; color: var(--ink-2); }
.prose p { max-width: 62ch; color: var(--ink-2); }
.prose strong { color: var(--ink); font-weight: 500; }
code { font-family: var(--mono); font-size: 0.875em; }

/* Hero */
.hero { border-bottom: 1px solid var(--rule); background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 32px 32px; background-position: -1px -1px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: clamp(32px, 6vw, 96px); align-items: end; padding-top: clamp(56px, 10vw, 128px); padding-bottom: clamp(56px, 8vw, 104px); }
.hero-grid.wide-aside { grid-template-columns: minmax(0, 1fr) minmax(0, 460px); }
.note { display: flex; align-items: center; gap: 0.7em; margin: 28px 0 0; font-family: var(--mono); font-size: 0.8125rem; color: var(--ink-3); }
.note::before { content: ""; flex: none; width: 8px; height: 8px; background: var(--accent); }

/* Dictionary entry */
.entry { padding: 20px 22px 6px; background: var(--paper); border: 1px solid var(--rule); border-top: 2px solid var(--ink); font-size: 0.9375rem; }
.entry-head { display: flex; align-items: baseline; gap: 12px; }
.entry .hw { font-family: var(--serif); font-size: 2rem; line-height: 1; letter-spacing: -0.01em; }
.entry .hw.abbr { font-family: var(--mono); font-size: 1.25rem; font-weight: 500; letter-spacing: 0.06em; color: var(--accent); }
.entry .pron { font-family: var(--mono); font-size: 0.8125rem; color: var(--ink-3); }
.entry .pos { margin: 4px 0 8px; font-family: var(--serif); font-style: italic; color: var(--ink-3); }
.entry p { color: var(--ink-2); }
.entry hr { margin: 18px 0 16px; border: 0; border-top: 1px solid var(--rule); }

/* Sections */
.section { padding: clamp(64px, 9vw, 120px) 0; border-bottom: 1px solid var(--rule); }
.section-grid { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: clamp(24px, 5vw, 64px); }
.section-side { position: sticky; top: 96px; align-self: start; }
.rule-top { margin-top: 40px; border-top: 1px solid var(--rule-strong); }

/* Pipeline steps */
.steps { list-style: none; margin: 40px 0 0; padding: 0; border-top: 1px solid var(--rule-strong); }
.step { display: grid; grid-template-columns: 48px 150px minmax(0, 1fr) 170px; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--rule); }
.step.head { padding: 12px 0; }
.step .n { padding-top: 0.45em; font-family: var(--mono); font-size: 0.8125rem; color: var(--accent); }
.step h3 { font-size: 1.5rem; }
.step p { margin: 0; color: var(--ink-2); }
.gate { display: flex; align-items: baseline; gap: 0.6em; padding-top: 0.35em; font-family: var(--mono); font-size: 0.8125rem; color: var(--ink); }
.gate::before { content: ""; flex: none; width: 9px; height: 9px; border: 1.5px solid var(--accent); transform: translateY(1px); }
.chain { display: flex; flex-wrap: wrap; gap: 8px 0; list-style: none; margin: 16px 0 0; padding: 0; font-family: var(--mono); font-size: 0.75rem; }
.chain li { display: flex; align-items: center; }
.chain li span { padding: 3px 8px; border: 1px solid var(--rule); color: var(--ink-2); white-space: nowrap; }
.chain li.g span { border-color: var(--accent); color: var(--ink); }
.chain li:not(:last-child)::after { content: "\2192"; margin: 0 6px; color: var(--ink-3); }
@media (max-width: 900px) {
  .step { grid-template-columns: 36px minmax(0, 1fr); gap: 6px 16px; }
  .step > :nth-child(n + 3) { grid-column: 2; }
  .step.head { display: none; }
}

/* Principles */
.principles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 40px; border-top: 1px solid var(--rule-strong); }
.principle { padding: 28px 0 32px; border-bottom: 1px solid var(--rule); }
.principle:nth-child(odd) { padding-right: 32px; border-right: 1px solid var(--rule); }
.principle:nth-child(even) { padding-left: 32px; }
.principle h3 { margin: 10px 0; font-size: 1.6rem; line-height: 1.15; }
.principle p { margin: 0; color: var(--ink-2); }
@media (max-width: 760px) {
  .principles { grid-template-columns: minmax(0, 1fr); }
  .principle:nth-child(odd), .principle:nth-child(even) { padding: 24px 0 28px; border-right: 0; }
}

/* Data sheet */
.sheet { margin: 40px 0 0; border-top: 1px solid var(--rule-strong); }
.sheet-row { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--rule); }
.sheet dt { padding-top: 0.3em; }
.sheet dd { margin: 0; }
.sheet dd small { display: block; color: var(--ink-3); font-size: 0.875rem; }
.sheet dd strong { display: block; font-family: var(--serif); font-size: 1.375rem; font-weight: 400; line-height: 1.25; }
.sheet dd p { margin: 6px 0 0; max-width: 62ch; color: var(--ink-2); }
@media (max-width: 640px) { .sheet-row { grid-template-columns: minmax(0, 1fr); gap: 4px; } }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); margin: 32px 0 0; border-top: 1px solid var(--rule-strong); }
.stat { padding: 18px 20px 20px 0; border-bottom: 1px solid var(--rule); }
.stat .v { display: block; font-family: var(--serif); font-size: 2.6rem; line-height: 1; letter-spacing: -0.02em; }
.stat .k { display: block; margin-top: 8px; }

/* Code */
.code { position: relative; margin: 24px 0 0; padding: 44px 20px 18px; overflow-x: auto; background: var(--panel); border: 1px solid var(--rule); font-family: var(--mono); font-size: 0.8125rem; line-height: 1.75; color: var(--ink); }
.code pre { margin: 0; font: inherit; white-space: pre; }
.code .c { color: var(--ink-3); }
.code .p { color: var(--accent); user-select: none; }
.code .copy { position: absolute; top: 10px; right: 10px; padding: 4px 9px; background: var(--paper); border: 1px solid var(--rule); font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); cursor: pointer; }
.code .copy:hover { border-color: var(--ink); color: var(--ink); }

/* Tables and tags */
.table-wrap { margin: 24px 0 0; overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.table th { padding: 10px 16px 10px 0; text-align: left; border-bottom: 1px solid var(--rule-strong); }
.table td { padding: 12px 16px 12px 0; vertical-align: top; border-bottom: 1px solid var(--rule); color: var(--ink-2); }
.table td:first-child { color: var(--ink); white-space: nowrap; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 16px 0 0; padding: 0; }
.tags li { padding: 4px 10px; border: 1px solid var(--rule); font-family: var(--mono); font-size: 0.8125rem; color: var(--ink-2); }
.links { display: flex; flex-wrap: wrap; gap: 8px 24px; margin: 28px 0 0; padding: 0; list-style: none; font-size: 0.9375rem; }
.links a { color: var(--ink); }
.links a:hover { color: var(--accent); }
.subhead { margin: 48px 0 0; font-size: 1.5rem; }

/* Call to action band */
.cta { padding: clamp(64px, 9vw, 112px) 0; background: var(--inverse-bg); color: var(--inverse-ink); }
.cta .label { color: var(--inverse-ink-2); }
.cta h2 { max-width: 18ch; color: var(--inverse-ink); }
.cta p { max-width: 52ch; color: var(--inverse-ink-2); }
.cta-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px 64px; align-items: end; }
@media (max-width: 760px) { .cta-grid { grid-template-columns: minmax(0, 1fr); } }

/* Footer */
.site-footer { padding: 56px 0 36px; font-size: 0.9375rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; }
.footer-grid p { max-width: 36ch; margin-top: 12px; color: var(--ink-2); }
.footer-grid ul { list-style: none; margin: 14px 0 0; padding: 0; }
.footer-grid li { margin: 0 0 8px; }
.footer-grid li a { color: var(--ink-2); text-decoration: none; }
.footer-grid li a:hover { color: var(--accent); text-decoration: underline; }
.fineprint { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--rule); font-family: var(--mono); font-size: 0.75rem; color: var(--ink-3); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }

@media (max-width: 860px) {
  .hero-grid, .hero-grid.wide-aside, .section-grid { grid-template-columns: minmax(0, 1fr); }
  .section-side { position: static; }
  .entry { max-width: 420px; }
}