/* SibTech LLC — site styles */

:root {
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --bg-deep: #0f1620;
  --ink: #16202b;
  --ink-soft: #4a5a6a;
  --ink-faint: #8494a4;
  --line: #e2e6ea;
  --line-soft: #eef1f4;
  --accent: #1f5f8b;
  --accent-soft: #e8f0f6;
  --on-deep: #dbe3ec;
  --on-deep-faint: #8fa0b3;
  --radius: 6px;
  --maxw: 1080px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1620;
    --bg-alt: #151e29;
    --bg-deep: #0a1017;
    --ink: #e4eaf1;
    --ink-soft: #a3b2c2;
    --ink-faint: #708294;
    --line: #24313f;
    --line-soft: #1c2733;
    --accent: #6fb3dd;
    --accent-soft: #16232f;
    --on-deep: #dbe3ec;
    --on-deep-faint: #8fa0b3;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

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

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 650;
  letter-spacing: -0.01em;
  font-size: 18px;
}

.brand:hover { text-decoration: none; }

.brand .mark {
  width: 26px;
  height: 26px;
  flex: none;
}

.brand .llc {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  padding-top: 3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 15px;
}

.nav a { color: var(--ink-soft); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { font-weight: 600; }

.nav .btn { color: #fff; }

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 550;
  border: 1px solid var(--accent);
}

.btn:hover { text-decoration: none; opacity: 0.9; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-ghost:hover { border-color: var(--ink-faint); }

@media (prefers-color-scheme: dark) {
  .btn { color: #0d1219; }
  .nav .btn { color: #0d1219; }
}

/* ---------- sections ---------- */

section { padding: 76px 0; }
section + section { border-top: 1px solid var(--line-soft); }
.alt { background: var(--bg-alt); border-top: 1px solid var(--line-soft); }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}

h1, h2, h3 { letter-spacing: -0.02em; line-height: 1.2; margin: 0 0 18px; }
h1 { font-size: clamp(32px, 5vw, 48px); font-weight: 680; }
h2 { font-size: clamp(25px, 3.4vw, 33px); font-weight: 660; }
h3 { font-size: 19px; font-weight: 640; letter-spacing: -0.01em; }

p { margin: 0 0 18px; color: var(--ink-soft); }
.lead { font-size: 19px; color: var(--ink-soft); max-width: 62ch; }
.measure { max-width: 66ch; }

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

.hero { padding: 96px 0 84px; }
.hero h1 { max-width: 17ch; }
.hero .lead { font-size: 20px; margin-bottom: 32px; }

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.hero-meta {
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--ink-faint);
}

.hero-meta span { font-family: var(--mono); font-size: 13px; }

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

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 860px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  background: var(--bg);
}

.card h3 { margin-bottom: 10px; }
.card p { margin: 0; font-size: 15.5px; }

.card .num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  display: block;
  margin-bottom: 12px;
}

/* ---------- service list ---------- */

.svc { border-top: 1px solid var(--line); padding: 30px 0; }
.svc:last-child { border-bottom: 1px solid var(--line); }

.svc-head {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  align-items: start;
}

.svc-head .idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  padding-top: 5px;
}

.svc-head p { margin: 0; max-width: 68ch; }
.svc-head h3 { margin-bottom: 8px; }

@media (max-width: 640px) {
  .svc-head { grid-template-columns: 1fr; gap: 8px; }
}

/* ---------- steps ---------- */

.step { padding: 26px 0; border-top: 1px solid var(--line); }
.step:first-of-type { border-top: none; }
.step .phase {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 8px;
}
.step h3 { margin-bottom: 8px; }
.step p { margin: 0; max-width: 68ch; }

/* ---------- stack ---------- */

.stack { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }

.stack li {
  list-style: none;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 5px 11px;
  background: var(--bg);
}

ul.stack { padding: 0; margin: 0; }

/* ---------- facts table ---------- */

.facts { width: 100%; border-collapse: collapse; font-size: 15.5px; }
.facts th, .facts td { text-align: left; padding: 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.facts th { width: 230px; font-weight: 600; color: var(--ink); }
.facts td { color: var(--ink-soft); }

@media (max-width: 640px) {
  .facts th, .facts td { display: block; width: auto; border-bottom: none; padding: 4px 0; }
  .facts tr { display: block; border-bottom: 1px solid var(--line); padding: 12px 0; }
}

/* ---------- bullets ---------- */

.ticks { padding: 0; margin: 0 0 18px; list-style: none; }
.ticks li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 11px;
  color: var(--ink-soft);
  font-size: 15.5px;
}
.ticks li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- CTA band ---------- */

.band { background: var(--bg-deep); color: var(--on-deep); border: none; }
.band h2 { color: #fff; }
.band p { color: var(--on-deep-faint); }
.band .btn { background: #fff; color: #0f1620; border-color: #fff; }

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

.site-footer {
  border-top: 1px solid var(--line);
  padding: 46px 0 56px;
  font-size: 14.5px;
  color: var(--ink-faint);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 34px;
}

@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; gap: 26px; } }

.site-footer h4 {
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 12px;
  font-weight: 500;
}

.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--ink-soft); }
.site-footer p { color: var(--ink-faint); font-size: 14.5px; margin: 0 0 10px; }

.legal {
  border-top: 1px solid var(--line-soft);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13.5px;
}

/* ---------- misc ---------- */

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 12px;
  top: 12px;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius);
  z-index: 50;
}

.page-head { padding: 68px 0 42px; }
.page-head h1 { max-width: 20ch; }