/* Dysrupt Labs — shared stylesheet
   light + dark themes · IBM Plex Sans body · IBM Plex Serif display · 720px column */

:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --ink: #1a1814;
  --ink-soft: #5b554c;
  --accent: #8b7355;
  --rule: #e3ddd2;
  --max: 720px;
  --serif: 'IBM Plex Serif', Georgia, 'Iowan Old Style', 'Charter', serif;
  --sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

[data-theme="dark"] {
  --bg: #0f1419;
  --surface: #161b22;
  --ink: #e8e6e3;
  --ink-soft: #b0ada8;
  --accent: #89C4E1;
  --rule: #2a2f36;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.nav { border-bottom: 1px solid var(--rule); background: var(--bg); }
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 0;
}
.brand-logo {
  height: 44px;
  width: auto;
  display: block;
}
[data-theme="dark"] .brand-logo {
  filter: brightness(1.3) saturate(0.85);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--sans);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
}
.nav-links a:hover, .nav-links a.current { color: var(--accent); }

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color .15s ease, border-color .15s ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Main column */
main { max-width: var(--max); margin: 0 auto; padding: 80px 24px 48px; }

h1 {
  font-family: var(--serif);
  font-weight: 300;
  font-size: 36px;
  line-height: 1.25;
  margin: 0 0 28px;
  letter-spacing: -0.005em;
}
h2 {
  font-family: var(--sans);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 600;
  margin: 56px 0 20px;
}
h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 20px;
  line-height: 1.35;
  margin: 0 0 8px;
}
p { margin: 0 0 18px; color: var(--ink-soft); }
a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
.lede { font-size: 17px; line-height: 1.8; color: var(--ink-soft); }

/* Home — signals */
.signal { margin: 0 0 36px; }
.signal-num {
  font-family: var(--sans);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  margin: 0 0 4px;
}
.signal-body { color: var(--ink-soft); margin: 6px 0 0; }
.cite {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Research — publications */
.pub { margin: 0 0 32px; }
.pub-meta {
  font-family: var(--sans);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin: 0 0 6px;
}
.pub-title {
  font-family: var(--serif);
  font-weight: normal;
  font-size: 19px;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--ink);
}
.pub-authors { color: var(--ink-soft); margin: 0 0 6px; }
.pub-cite { font-family: var(--sans); font-size: 13px; color: var(--ink-soft); margin: 0; }
.pub-cite a { color: var(--accent); }

/* Team — people */
.person { margin: 0 0 36px; }
.person-name {
  font-family: var(--serif);
  font-weight: normal;
  font-size: 22px;
  line-height: 1.3;
  margin: 0 0 4px;
}
.person-role {
  font-family: var(--sans);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  margin: 0 0 12px;
}
.person p { color: var(--ink-soft); }

/* Contact — card */
.contact-card {
  border: 1px solid var(--rule);
  padding: 28px;
  margin: 32px 0 0;
  background: var(--surface);
}
.contact-card .label {
  font-family: var(--sans);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  margin: 0 0 6px;
}
.contact-card .value {
  font-family: var(--serif);
  font-size: 22px;
  margin: 0 0 18px;
}
.contact-card .value a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--accent); padding-bottom: 1px; }
.contact-card .value a:hover { color: var(--accent); }
.contact-card .postal {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin: 0;
}
.ask { font-size: 17px; color: var(--ink); }
.ask ul { padding-left: 20px; margin: 0 0 18px; }
.ask li { margin: 0 0 8px; color: var(--ink-soft); }

/* Legal — meta table */
.meta-table {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 24px 0 0;
}
.meta-table .row { display: flex; gap: 16px; padding: 8px 0; border-top: 1px solid var(--rule); }
.meta-table .row:last-child { border-bottom: 1px solid var(--rule); }
.meta-table .key { width: 200px; flex-shrink: 0; text-transform: uppercase; letter-spacing: 0.08em; font-size: 11px; padding-top: 2px; }
.meta-table .val { color: var(--ink); }
.last-updated {
  font-family: var(--sans);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin: 0 0 32px;
}

/* End-of-page contact block */
.end-block { border-top: 1px solid var(--rule); margin-top: 48px; padding-top: 32px; }

/* Footer */
footer { border-top: 1px solid var(--rule); margin-top: 80px; padding: 40px 0 56px; background: var(--bg); }
.foot-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.foot-disclaimer { margin: 0 0 16px; }
.foot-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
}
.foot-meta a { color: var(--ink-soft); text-decoration: none; }
.foot-meta a:hover { color: var(--accent); }

/* Mobile */
@media (max-width: 540px) {
  h1 { font-size: 28px; }
  .lede { font-size: 16px; }
  main { padding: 48px 24px 40px; }
  .nav-links { gap: 14px; font-size: 12px; }
  .brand-logo { height: 36px; }
  .contact-card .value { font-size: 18px; word-break: break-word; }
  .meta-table .row { flex-direction: column; gap: 4px; }
  .meta-table .key { width: 100%; }
}