/* Cardano PubSub site — shared brand tokens, base reset, navbar, and theme toggle. */

:root {
  /* IOG brand palette — identical in every theme */
  --iog-infared: #E52321;
  --iog-dawn: #EC641D;
  --iog-acid-green: #06FF89;
  --iog-electric-blue: #16E9D8;
  --iog-volt-yellow: #F2FF58;
  --iog-ember-orange: #FF532C;
  --iog-cobalt-pulse: #2C4FFA;
  --iog-ultraviolet: #A700FF;
  --iog-hyper-pink: #FF79FC;

  /* Light theme (default) */
  --bg: #FFFFFF;
  --bg-soft: #FAFAFA;
  --bg-alt: #F4F4F2;
  --bg-code: #F4F4F2;
  --line: rgba(0,0,0,0.10);
  --line-strong: rgba(0,0,0,0.22);
  --text: #0A0A0A;
  --text-mute: #4A4A4A;
  --text-faint: #888888;

  --card-fill: #FFFFFF;
  --card-soft-fill: #FAFAFA;
  --card-stroke: #0A0A0A;
  --card-stroke-soft: #888888;
  --card-stroke-faint: #E0E0E0;

  --good: #00994A;
  --good-soft: #E2F5EB;
  --bad: #E52321;
  --bad-soft: #FCEAE9;
  --warn: #A88200;
  --warn-soft: #FBF1CC;
  --info: #2C4FFA;
  --info-soft: #E7EBFE;
  --accent: #E52321;

  /* Height of the sticky navbar: 14px padding twice, a 36px icon button, 1px rule. */
  --nav-height: 65px;

  --font-display: 'Barlow', 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body: 'Barlow', 'Bricolage Grotesque', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  /* Taken from the mark's own artwork: the inbound half's red and the outbound
     half's black. The brand wordmark and the hero tagline both draw from these,
     so the name is coloured identically wherever it appears. */
  --mark-in: rgba(216, 44, 2, 0.7);
  --mark-out: #1D1D1B;
}

html[data-theme="dark"] {
  /* The outbound half is drawn white in the dark artwork; the red stays red. */
  --mark-in: rgba(226, 52, 10, 0.82);
  --mark-out: #FFFFFF;

  --bg: #0A0A0A;
  --bg-soft: #121212;
  --bg-alt: #181818;
  --bg-code: #1A1A1A;
  --line: rgba(255,255,255,0.10);
  --line-strong: rgba(255,255,255,0.22);
  --text: #F4F4F2;
  --text-mute: #B5B5B5;
  --text-faint: #7A7A7A;

  --card-fill: #181818;
  --card-soft-fill: #121212;
  --card-stroke: #F4F4F2;
  --card-stroke-soft: #7A7A7A;
  --card-stroke-faint: #2A2A2A;

  --good: #06FF89;
  --good-soft: #0C2A1C;
  --bad: #FF5653;
  --bad-soft: #2A0C0B;
  --warn: #F2FF58;
  --warn-soft: #2B2A0B;
  --info: #8FA3FF;
  --info-soft: #0E1638;
}

/* Base reset */
* { box-sizing: border-box; margin: 0; padding: 0; }
/* Subscripts (k_in, k_out) must not stretch the line they sit on. */
sub, sup { line-height: 0; }
/* Anchored sections land with their top edge flush under the sticky navbar — no
   extra offset, or a sliver of the previous section stays on screen. Each
   section's own top padding supplies the breathing room above its title. */
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  transition: background .2s ease, color .2s ease;
}

/* Logo swap: POS on light backgrounds, NEG on dark */
.logo-light { display: block; }
.logo-dark { display: none; }
html[data-theme="dark"] .logo-light { display: none; }
html[data-theme="dark"] .logo-dark { display: block; }

/* Top navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(24px, 5vw, 80px);
  padding-right: clamp(80px, 8vw, 120px); /* leave room for the fixed theme toggle */
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  position: sticky;
  top: 0;
  z-index: 40;
}
.navbar-brand {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  white-space: nowrap;
  transition: color .12s ease;
}
.navbar-brand:hover { color: var(--iog-infared); }
.navbar-brand .brand-tag {
  color: var(--text-faint);
  font-weight: 500;
  margin-left: 6px;
}
.navbar-links {
  display: flex;
  gap: clamp(14px, 2.5vw, 28px);
  flex-wrap: wrap;
  justify-content: flex-end;
}
.navbar-links a {
  color: var(--text-mute);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  padding: 4px 0;
  position: relative;
  transition: color .12s ease;
}
.navbar-links a:hover { color: var(--iog-infared); }
.navbar-links a.active { color: var(--iog-infared); }
.navbar-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--iog-infared);
}

/* Theme toggle — Light · Dark */
.theme-toggle {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 50;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .15s ease, color .15s ease;
}
.theme-toggle:hover { border-color: var(--iog-infared); color: var(--iog-infared); }
.theme-toggle svg { width: 16px; height: 16px; display: block; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Shared section furniture */
.container {
  max-width: clamp(820px, 76vw, 1280px);
  margin: 0 auto;
  padding: 0 clamp(24px, 5vw, 80px);
  width: 100%;
}
.section-kind {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--iog-infared);
  font-weight: 600;
  margin-bottom: 12px;
}

/* ---------- Brand lockup ----------
   The two halves of the Input Output mark flank the name: the inbound fan on the
   left, the outbound fan on the right — publish in, deliver out. The words take
   their colour from the half beside them. Deliberately no `display` on
   .brand-half: .logo-light/.logo-dark above own that, and overriding it would
   show both themes' artwork at once. */
.navbar-brand { display: inline-flex; align-items: center; gap: 9px; }
.brand-half { height: 21px; width: auto; flex-shrink: 0; }
.brand-name { letter-spacing: 0.14em; color: var(--mark-out); }
.brand-scope {
  color: var(--mark-in);
  font-weight: 500;
  margin-right: 0.5em;
}
.navbar-brand:hover .brand-scope { color: rgba(216, 44, 2, 1); }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--line); padding: 30px 0 36px; }
.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 28px;
  padding-bottom: 30px;
}
.footer-col { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; }
.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--iog-infared);
  margin-bottom: 2px;
}
.footer-col a {
  font-size: 0.9rem;
  color: var(--text-mute);
  text-decoration: none;
  transition: color .12s ease;
}
.footer-col a:hover { color: var(--iog-infared); }
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}
/* The attribution uses the wordmark artwork, so "Input Output" appears in the
   typeface of the logo itself rather than an approximation of it. */
.footer-credit { display: inline-flex; align-items: center; gap: 10px; }
.footer-wordmark { height: 13px; width: auto; }
footer p {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  letter-spacing: 0.06em;
}