/* Sodium Chart — Sodium Chart Room
   Signature: horizontal sodium-vapor band + chart grid on deep slate.
   Distinct from: Spare Beam void/beam, Riso Folio paste-up, Cyanotype Survey Desk,
   tractor-feed, parchment/brass, sage bars, cold desk. */

:root {
  color-scheme: dark;

  --slate: #0F1418;
  --raised: #1A2229;
  --ink: #F3EFE6;
  --muted: #8B939C;
  --line: #2A343C;
  --sodium: #FFB020;
  --chart: #2EC4B6;

  --display: "Outfit", "Segoe UI", sans-serif;
  --text: "Manrope", "Segoe UI", sans-serif;
  --mono: "DM Mono", ui-monospace, monospace;

  --shell: min(1040px, calc(100% - 2.25rem));
  --measure: 64ch;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255, 176, 32, 0.06) 0, transparent 28%),
    var(--slate);
  color: var(--ink);
  font-family: var(--text);
  font-size: 1.0625rem;
  line-height: 1.68;
  font-weight: 400;
}

img, svg { max-width: 100%; display: block; }

a {
  color: var(--chart);
  text-underline-offset: 0.18em;
}
a:hover { color: var(--sodium); }

:focus-visible {
  outline: 2px solid var(--sodium);
  outline-offset: 3px;
}

.sc-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--sodium);
  color: var(--slate);
  padding: 0.5rem 1rem;
  z-index: 100;
  font-family: var(--display);
}
.sc-skip:focus { left: 1rem; top: 1rem; }

.sc-shell {
  width: var(--shell);
  margin-inline: auto;
}

.sc-top {
  position: relative;
  z-index: 2;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--slate) 90%, transparent);
  backdrop-filter: blur(8px);
}
.sc-top .sc-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
}

.sc-wordmark {
  font-family: var(--display);
  font-weight: 650;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.sc-wordmark:hover { color: var(--sodium); }

.sc-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.92rem;
}
.sc-nav a {
  color: var(--muted);
  text-decoration: none;
}
.sc-nav a:hover,
.sc-nav a[aria-current="page"] { color: var(--ink); }

.sc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3.5rem, 10vw, 7rem) 0 clamp(3rem, 7vw, 5rem);
  border-bottom: 1px solid var(--line);
}

.sc-sodium {
  position: absolute;
  left: 0;
  right: 0;
  top: 18%;
  height: 4.5rem;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 176, 32, 0.08) 12%,
    rgba(255, 176, 32, 0.55) 48%,
    rgba(255, 176, 32, 0.12) 78%,
    transparent 100%
  );
  filter: blur(0.5px);
  pointer-events: none;
  animation: sc-sodium-fade 7s ease-in-out infinite alternate;
}

.sc-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(46, 196, 182, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 196, 182, 0.14) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 85%);
}

@keyframes sc-sodium-fade {
  from { opacity: 0.55; transform: translateY(0); }
  to { opacity: 0.95; transform: translateY(6px); }
}

@media (prefers-reduced-motion: reduce) {
  .sc-sodium { animation: none; }
  html { scroll-behavior: auto; }
}

.sc-hero__inner { position: relative; z-index: 1; }

.sc-kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sodium);
  margin: 0 0 1rem;
}

.sc-hero h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.6rem, 8vw, 4.6rem);
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 0 0 1rem;
  max-width: 10ch;
}

.sc-lede {
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.12rem;
  margin: 0 0 1.75rem;
}

.sc-cta {
  display: inline-block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--slate);
  background: var(--sodium);
  text-decoration: none;
  padding: 0.7rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--sodium) 70%, #fff);
}
.sc-cta:hover {
  color: var(--slate);
  background: color-mix(in srgb, var(--sodium) 85%, #fff);
}

.sc-section {
  padding: clamp(2.75rem, 6vw, 4.5rem) 0;
  border-bottom: 1px solid var(--line);
}
.sc-section--raised { background: var(--raised); }

.sc-section h2 {
  font-family: var(--display);
  font-weight: 650;
  font-size: clamp(1.45rem, 3vw, 1.95rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.65rem;
}

.sc-section > .sc-shell > p {
  max-width: var(--measure);
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.sc-rows {
  display: grid;
  gap: 1.25rem;
}
.sc-row {
  display: grid;
  gap: 0.5rem 1.5rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
}
.sc-row:last-child { border-bottom: 1px solid var(--line); }
.sc-row h3 {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.015em;
}
.sc-row h3 a {
  color: var(--ink);
  text-decoration: none;
}
.sc-row h3 a:hover { color: var(--sodium); }
.sc-row p { margin: 0 0 0.4rem; max-width: var(--measure); color: var(--muted); }
.sc-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--chart);
}

@media (min-width: 760px) {
  .sc-row {
    grid-template-columns: minmax(12rem, 0.9fr) 1.4fr;
    align-items: start;
  }
}

.sc-defs {
  margin: 0;
  display: grid;
  gap: 1.15rem;
}
.sc-defs dt {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0;
}
.sc-defs dd {
  margin: 0.35rem 0 0;
  color: var(--muted);
  max-width: var(--measure);
}
.sc-defs dd p { margin: 0; }

.sc-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
  max-width: var(--measure);
}
.sc-list li { margin-bottom: 0.45rem; }

.sc-not {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--raised) 80%, #000);
  padding: 1.25rem 1.35rem;
}
.sc-not h2 { margin-top: 0; }
.sc-not ul { margin: 0.75rem 0 0; }

.sc-article-head {
  position: relative;
  overflow: hidden;
  padding: clamp(2.5rem, 6vw, 4rem) 0 2rem;
  border-bottom: 1px solid var(--line);
}
.sc-article-head .sc-sodium { top: 35%; height: 2.75rem; opacity: 0.7; }
.sc-article-body { padding: clamp(2rem, 5vw, 3.25rem) 0 3.5rem; }

.sc-prose {
  max-width: var(--measure);
}
.sc-prose h2 {
  font-family: var(--display);
  font-size: 1.25rem;
  margin: 1.75rem 0 0.65rem;
}
.sc-prose p { margin: 0 0 1.05em; color: color-mix(in srgb, var(--ink) 88%, var(--muted)); }
.sc-prose ul {
  margin: 0 0 1.05em;
  padding-left: 1.15rem;
  color: var(--muted);
}

.sc-stamp {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 2rem;
}

.sc-foot {
  padding: 2rem 0 2.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.sc-foot-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.15rem;
  padding: 0;
  margin: 0 0 1.15rem;
}
.sc-foot-links a {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-size: 0.9rem;
}
.sc-foot-links a:hover { color: var(--sodium); }
.sc-foot p { max-width: 62ch; margin: 0 0 0.65rem; }