/* ============================================================
   organizationalamnesia.com — shared stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,500;0,8..60,600;0,8..60,700;1,8..60,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #0a0a0a;
  --bg-2: #111110;
  --bg-3: #161614;
  --fg: #e8e4d8;
  --fg-dim: #b3ad9d;
  --fg-mute: #6f6a5d;
  --rule: #2a2823;
  --rule-strong: #3a382f;
  --accent: #7fb069;
  --accent-dim: #4a6a3f;
  --warn: #c1664a;
  --paper: #ede7d6;
  --paper-2: #d8d2bf;

  --serif: "Source Serif 4", "Charter", "Iowan Old Style", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --measure: 64ch;
  --gutter: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "onum";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--rule-strong); transition: border-color 160ms ease, color 160ms ease; }
a:hover { border-bottom-color: var(--accent); color: var(--accent); }

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

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 14px var(--gutter);
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.topbar .brand {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 15px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--fg);
  border-bottom: none;
}
.topbar .brand:hover { color: var(--accent); border-bottom: none; }
.topbar .center {
  text-align: center;
  color: var(--fg-dim);
}
.topbar nav {
  display: flex; gap: 22px; justify-self: end;
}
.topbar nav a { border-bottom: none; color: var(--fg-dim); }
.topbar nav a:hover { color: var(--accent); }
.topbar nav a.active { color: var(--fg); }

/* ---------- Section frame ---------- */
.section {
  padding: clamp(60px, 9vw, 140px) var(--gutter);
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.section + .section { border-top: none; }

.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  margin-bottom: 56px;
  align-items: baseline;
}
.section-head .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-mute);
  border-top: 1px solid var(--rule-strong);
  padding-top: 10px;
}
.section-head h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.15;
  margin: 0;
  max-width: 22ch;
  text-wrap: balance;
}
.section-head h2 em { font-style: italic; color: var(--fg-dim); }

@media (max-width: 720px) {
  .section-head { grid-template-columns: 1fr; gap: 14px; }
}

/* ---------- Type primitives ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-mute);
}
.lede {
  font-size: clamp(20px, 2.1vw, 26px);
  line-height: 1.45;
  color: var(--fg);
  max-width: 30ch;
  font-weight: 300;
  text-wrap: pretty;
}
.body p { max-width: var(--measure); text-wrap: pretty; }
.body p + p { margin-top: 1.1em; }

.dropcap::first-letter {
  font-size: 4.6em;
  float: left;
  line-height: 0.85;
  padding: 6px 10px 0 0;
  font-weight: 400;
  color: var(--fg);
}

.smallcaps {
  font-variant-caps: small-caps;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
}

/* ---------- Footnotes / asides ---------- */
.cite {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--fg-mute);
  text-transform: uppercase;
}

/* ---------- Number / data display ---------- */
.figure {
  font-family: var(--serif);
  font-feature-settings: "lnum", "tnum";
  font-weight: 300;
  font-size: clamp(54px, 9vw, 128px);
  line-height: 0.95;
  letter-spacing: -0.02em;
}
.figure .unit {
  font-size: 0.4em;
  vertical-align: super;
  font-family: var(--mono);
  font-weight: 400;
  color: var(--fg-dim);
  margin-left: 4px;
  letter-spacing: 0.02em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px;
  border: 1px solid var(--rule-strong);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg);
  background: transparent;
  cursor: pointer;
  transition: all 160ms ease;
  border-bottom: 1px solid var(--rule-strong);
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn .arrow { transition: transform 200ms ease; }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Footer ---------- */
.footer {
  padding: 80px var(--gutter) 60px;
  border-top: 1px solid var(--rule);
  background: var(--bg-2);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-mute);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer h4 {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0 0 16px;
  font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 8px; }
.footer a { border-bottom: none; color: var(--fg-mute); }
.footer a:hover { color: var(--accent); }
.footer .colophon { font-size: 11px; max-width: 36ch; line-height: 1.6; }
.footer .imprint { color: var(--fg); font-family: var(--serif); font-style: italic; font-size: 16px; margin-bottom: 8px; }

@media (max-width: 800px) {
  .footer { grid-template-columns: 1fr 1fr; }
}

/* ---------- Utility ---------- */
.divider {
  height: 1px;
  background: var(--rule);
  border: 0;
  margin: 0;
}
.tabular { font-feature-settings: "tnum", "lnum"; }
.serif-italic { font-family: var(--serif); font-style: italic; color: var(--fg-dim); }

/* Paper texture grain over backgrounds (subtle) */
.grain::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(232,228,216,0.025) 1px, transparent 1px);
  background-size: 3px 3px;
  mix-blend-mode: overlay;
  opacity: 0.6;
}