/* Shared styles for Arckhum Labs pages (home, privacy, press, future apps).
   The NUSUM page keeps its own inline copy of the same tokens. */
:root {
  --lime: #DFFF57;
  --ink: #17221A;
  --bg: #0F1611;
  --panel: #17221A;
  --line: #2A3A2E;
  --text: #EEF3EA;
  --muted: #9AA89C;
  --fs-title: 28px;
  --fs-heading: 17px;
  --fs-body: 15px;
  --fs-small: 14px;
  --fs-code: 13px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--lime); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* Header: logo plus ARCKHUM LABS wordmark. */
header.top { display: flex; align-items: center; justify-content: space-between; padding: 24px 0; }
.studio { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; white-space: nowrap;
  font-family: Sora, -apple-system, BlinkMacSystemFont, sans-serif; font-weight: 300; font-size: 14px; letter-spacing: 2px; text-transform: uppercase; }
.studio img { width: 14px; height: 14px; }
.studio > span { text-box: trim-both cap alphabetic; }
@supports not (text-box: trim-both cap alphabetic) { .studio > span { position: relative; top: 1px; } }
.studio .labs { color: var(--muted); }
.top nav a { white-space: nowrap; color: var(--muted); text-decoration: none; font-size: 14px; margin-left: 20px; }
.top nav a:hover, .top nav a[aria-current] { color: var(--text); }
@media (max-width: 600px) { .top nav { display: none; } }

/* Type scale. */
h1 { font-size: clamp(32px, 6vw, 48px); font-weight: 600; line-height: 1.15; letter-spacing: -0.5px; margin: 0 0 16px; }
h2 { font-size: var(--fs-title); font-weight: 600; margin: 0 0 24px; display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
h2 .idx { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: var(--fs-small); font-weight: 400; color: var(--lime); }
h3 { margin: 0 0 6px; font-size: var(--fs-heading); font-weight: 600; }
p, li { font-size: var(--fs-body); }
.lead { color: var(--muted); font-size: clamp(17px, 2.4vw, 21px); max-width: 640px; margin: 0; }
.muted { color: var(--muted); }
p.muted { font-size: var(--fs-small); }
code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: var(--fs-code); color: var(--lime); }

/* Sections are separated by a rule, not boxed. */
section { margin-top: 72px; padding-top: 40px; border-top: 1px solid var(--line); }
section.first { border-top: 0; padding-top: 0; margin-top: 56px; }

.button { display: inline-flex; align-items: center; gap: 8px; background: var(--lime); color: var(--ink); font-weight: 600;
  font-size: 15px; padding: 11px 20px; border-radius: 10px; text-decoration: none; }
.link { color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px; }
.link:hover { color: var(--lime); }

/* Long text pages (privacy). */
.prose { max-width: 720px; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--text); }
.prose h2 { font-size: var(--fs-title); margin: 48px 0 16px; }
.prose ul { padding-left: 20px; }

footer { margin-top: 96px; padding: 0 0 32px; color: var(--muted); font-size: 12px; text-align: center; }
footer nav { margin-bottom: 10px; }
footer nav a { color: var(--muted); text-decoration: none; margin: 0 10px; }
footer nav a:hover { color: var(--text); }

@media (max-width: 720px) {
  section { margin-top: 56px; padding-top: 32px; }
  h2, .prose h2 { font-size: 24px; }
}