/* Cobaltscale — cobaltscale.com
   One page: the validated "under construction" design.
   Design tokens: direction D1 Calibre, from brand/brand-book.md (revision 1.0).
   Flat ink only. No gradients, no drop shadows. */

:root {
  --cs-primary: #1E56D6;
  --cs-ink: #0B2A6B;
  --cs-accent: #C6F24E;
  --cs-ground-light: #F6F7F9;
  --cs-surface: #FFFFFF;
  --cs-ground-dark: #0E131C;
  --cs-muted: #5A6478;
  --cs-reverse: #EEF3FF;
  --cs-on-primary: #FFFFFF;

  /* Hairline. A low-opacity ink rule, not a new colour. */
  --cs-hairline: rgba(11, 42, 107, 0.12);

  --cs-space-1: 4px;
  --cs-space-2: 8px;
  --cs-space-3: 12px;
  --cs-space-4: 16px;
  --cs-space-6: 24px;
  --cs-space-8: 32px;

  --cs-font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --cs-font-text: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --cs-shell: 664px;   /* 624 px of content plus 20 px of padding each side */
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--cs-ground-light);
  color: var(--cs-ink);
  font-family: var(--cs-font-text);
  -webkit-font-smoothing: antialiased;
}

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

p, h1 { margin: 0; }

:focus-visible {
  outline: 2px solid var(--cs-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip-link:focus {
  left: var(--cs-space-4);
  top: var(--cs-space-4);
  z-index: 100;
  background: var(--cs-surface);
  color: var(--cs-ink);
  padding: var(--cs-space-3) var(--cs-space-4);
  border: 1px solid var(--cs-hairline);
  border-radius: 6px;
}

/* ---------- Shell ---------- */

.shell {
  width: 100%;
  max-width: var(--cs-shell);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */

.site-header {
  padding-top: clamp(13px, 2.05vw, 25px);
}

.lockup { height: 37px; width: auto; }

/* ---------- Main ---------- */

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--cs-space-8) 0;
}

.eyebrow {
  font-size: 12px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cs-primary);
  margin-bottom: 13px;
}

h1 {
  font-family: var(--cs-font-display);
  font-weight: 700;
  font-size: clamp(33px, 4.45vw, 57px);
  line-height: 1.08;
  letter-spacing: 0;
  margin-bottom: 15px;
}

.lead {
  font-size: clamp(17px, 1.64vw, 21px);
  line-height: 1.55;
  color: var(--cs-muted);
  max-width: 500px;
  margin-bottom: 16px;
}

.note {
  font-size: 16px;
  line-height: 1.55;
  color: var(--cs-muted);
  max-width: 520px;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--cs-hairline);
  padding: 24px 0;
}

.site-footer p {
  font-size: 15px;
  line-height: 1.53;
  color: var(--cs-muted);
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto; }
}