/* sdburgess.com — base layer: tokens, header, footer */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --sdb-steel-900: #2b3138;
  --sdb-steel-600: #4a545e;
  --sdb-steel-400: #6f7a86;
  --sdb-steel-200: #d3d9df;
  --sdb-steel-100: #e6eaee;
  --sdb-blue: #2f7bff;
  --sdb-blue-dim: #1f5fd0;
  --sdb-blue-wash: #e4eeff;
  --sdb-amber: #b8730d;
  --sdb-amber-wash: #fdf1de;
  --sdb-bg: #f5f7f9;
  --sdb-surface: #ffffff;
  --sdb-text: #21272d;
  --sdb-muted: #5a656f;
  --sdb-ui: "Inter", "Helvetica Neue", "Segoe UI", Roboto, Arial, sans-serif;
  --sdb-mono: "SFMono-Regular", "JetBrains Mono", "Roboto Mono", Menlo, Consolas,
    monospace;
  --sdb-r-xs: 3px;
  --sdb-r-sm: 6px;
  --sdb-r-md: 10px;
  --sdb-sh-1: 0 1px 2px rgba(43, 49, 56, 0.08);
  --sdb-sh-2: 0 6px 18px rgba(43, 49, 56, 0.1);
  --sdb-sh-3: 0 18px 44px rgba(43, 49, 56, 0.16);
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--sdb-bg);
  background-image:
    linear-gradient(rgba(74, 84, 94, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 84, 94, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--sdb-text);
  font-family: var(--sdb-ui);
  font-size: 16px;
  line-height: 1.66;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--sdb-blue-dim);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: var(--sdb-blue);
}

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

.sdb__topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--sdb-steel-900);
  border-bottom: 2px solid var(--sdb-blue);
}
.sdb__topbar_inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 13px 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.sdb__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sdb-ui);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #ffffff;
}
.sdb__brand:hover {
  color: #ffffff;
}
.sdb__brand_tick {
  display: inline-block;
  width: 10px;
  height: 10px;
  border: 2px solid var(--sdb-blue);
  border-radius: 2px;
}
.sdb__brand_tag {
  font-family: var(--sdb-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #8e9aa6;
  text-transform: none;
}

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

.sdb__footer {
  margin-top: 56px;
  background: var(--sdb-steel-900);
  color: #9aa5b0;
  padding: 26px 22px 22px;
  border-top: 2px solid var(--sdb-blue);
}
.sdb__footer_inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.sdb__footer_nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-bottom: 14px;
}
.sdb__footer_nav a {
  font-family: var(--sdb-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: #b3bdc7;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.sdb__footer_nav a:hover {
  color: #ffffff;
  border-bottom-color: var(--sdb-blue);
}
.sdb__footer_legal {
  font-size: 11.5px;
  line-height: 1.72;
  color: #7f8a95;
  max-width: 780px;
  margin: 0 auto 12px;
}
.sdb__footer_copy {
  font-family: var(--sdb-mono);
  font-size: 11.5px;
  color: #6f7a86;
}