/* Calypso Cloud Research — hand-written, no framework, no inline styles (CSP-friendly) */

:root {
  --bg:        #0b0c10;
  --bg-soft:   #101218;
  --surface:   #14161d;
  --line:      rgba(255, 255, 255, .08);
  --line-soft: rgba(255, 255, 255, .05);
  --ink:       #e9ebef;
  --ink-soft:  #a3a9b4;
  --ink-mute:  #6f7683;
  --accent:    #5e6ad2;
  --accent-dim: rgba(94, 106, 210, .14);
  --radius:    10px;
  --max:       780px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-feature-settings: "cv11", "ss01";
  letter-spacing: -0.006em;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line); }
a:hover { color: #fff; border-bottom-color: var(--accent); }
a.ext::after { content: ""; }

/* ---------- header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: var(--max); margin: 0 auto; padding: 18px 24px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.wordmark { font-weight: 600; font-size: 15px; letter-spacing: -0.01em; border: 0; }
.wordmark span { color: var(--ink-mute); font-weight: 400; margin-left: 6px; }
.wordmark:hover { border: 0; color: var(--ink); }

.site-header nav { display: flex; gap: 18px; font-size: 13.5px; }
.site-header nav a { color: var(--ink-soft); border: 0; }
.site-header nav a:hover { color: var(--ink); }

/* ---------- layout ---------- */

main { max-width: var(--max); margin: 0 auto; padding: 0 24px 40px; }

section { padding: 46px 0; border-top: 1px solid var(--line-soft); }
.hero { border-top: 0; padding-top: 64px; }

h1 {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.15; letter-spacing: -0.028em;
  font-weight: 600; margin: 14px 0 18px; max-width: 22ch;
}

h2 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .13em;
  color: var(--ink-mute); font-weight: 600; margin: 0 0 26px;
}

h3 { font-size: 16.5px; font-weight: 600; letter-spacing: -0.014em; margin: 0 0 4px; }

p { margin: 0 0 14px; color: var(--ink-soft); }
p:last-child { margin-bottom: 0; }
strong { color: var(--ink); font-weight: 600; }
em { color: var(--ink); font-style: normal; }

.eyebrow {
  font-size: 12px; text-transform: uppercase; letter-spacing: .13em;
  color: var(--ink-mute); margin: 0;
}

.lede { font-size: 17px; color: var(--ink-soft); max-width: 62ch; }

/* ---------- hero ---------- */

.chips {
  list-style: none; display: flex; flex-wrap: wrap; gap: 8px;
  margin: 26px 0 24px; padding: 0;
}
.chips li {
  font-size: 12.5px; color: var(--ink-soft);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 12px; background: var(--bg-soft);
}
.chips strong { color: var(--ink); font-variant-numeric: tabular-nums; }

.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; }

.btn {
  display: inline-block; font-size: 14px; font-weight: 500;
  padding: 9px 16px; border-radius: var(--radius);
  background: var(--accent); color: #fff; border: 1px solid var(--accent);
}
.btn:hover { background: #6b76dd; border-color: #6b76dd; color: #fff; }
.btn.ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.btn.ghost:hover { color: var(--ink); border-color: var(--ink-mute); background: var(--bg-soft); }

/* ---------- cards ---------- */

.card {
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 22px 24px;
  margin-bottom: 14px;
}
.card:hover { border-color: var(--line); }
.card header { margin-bottom: 12px; }
.card .meta {
  font-size: 12.5px; color: var(--ink-mute); margin: 0;
  font-variant-numeric: tabular-nums;
}
.card p { font-size: 14.8px; }
.links { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13.5px; margin-top: 14px; }
.links a { color: var(--accent); border: 0; }
.links a:hover { border-bottom: 1px solid var(--accent); }

/* ---------- repo list ---------- */

h2.sub { margin-top: 38px; }

.repo-list span a { color: var(--accent); font-weight: 400; border: 0; }
.repo-list span a:hover { border-bottom: 1px solid var(--accent); }

.repo-list { list-style: none; margin: 0; padding: 0; }
.repo-list li {
  display: grid; grid-template-columns: 120px 1fr; gap: 16px;
  padding: 13px 0; border-top: 1px solid var(--line-soft); align-items: baseline;
}
.repo-list li:first-child { border-top: 0; }
.repo-list a { font-size: 14.5px; font-weight: 500; border: 0; }
.repo-list a:hover { color: var(--accent); }
.repo-list span { font-size: 14px; color: var(--ink-soft); }

/* ---------- grid ---------- */

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 26px; }
.grid h3 { font-size: 15px; }
.grid p { font-size: 14.2px; }

.stack-line {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px;
}
.stack-line span {
  font-size: 12px; color: var(--ink-mute);
  border: 1px solid var(--line-soft); border-radius: 6px; padding: 3px 9px;
}

/* ---------- about / footer ---------- */

.about p { font-size: 15.4px; max-width: 66ch; }
.contact { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 22px; font-size: 14.5px; }

footer {
  max-width: var(--max); margin: 0 auto; padding: 26px 24px 56px;
  border-top: 1px solid var(--line-soft);
}
footer p { font-size: 12.5px; color: var(--ink-mute); margin: 0; }

/* ---------- small screens ---------- */

@media (max-width: 560px) {
  .site-header { padding: 14px 18px; }
  .site-header nav { gap: 12px; font-size: 12.5px; }
  .site-header nav a[href="#open-source"] { display: none; }
  main { padding: 0 18px 30px; }
  .hero { padding-top: 44px; }
  section { padding: 36px 0; }
  .repo-list li { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}