/* ============================================================
   Arcolab Health — stealth landing
   Light, calm, centered. One measured signal drifting behind.
   ============================================================ */

:root {
  --brandblue: #1a73e8;
  --blue:      #2e7dff;
  --teal:      #2fd4c4;

  --bg:    #f6f8fb;
  --fg:    #18202c;
  --muted: #6b7787;
  --faint: #8a95a3;
  --line:  rgba(20, 40, 70, .12);

  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
svg { display: block; }
:focus-visible { outline: 2.5px solid var(--brandblue); outline-offset: 3px; border-radius: 6px; }

/* ----------------------------- brand ----------------------------- */
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  font-weight: 650;
  font-size: 15px;
  letter-spacing: -.01em;
  color: var(--fg);
}
.brand .mark { width: 22px; height: 22px; flex: none; transform: translateY(2px); }
.brand b { font-weight: 650; }
.brand span { color: var(--muted); font-weight: 500; }

/* ----------------------------- header ---------------------------- */
.site-header {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  height: 60px;
  padding: 0 clamp(18px, 5vw, 32px);
}

/* ----------------------------- hero ------------------------------ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 92px clamp(22px, 7vw, 72px) 64px;
  overflow: hidden;
}
.hero .fx { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero .vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(ellipse 100% 88% at 50% 44%, transparent 58%, rgba(210, 220, 232, .38) 100%);
}
.hero-content { position: relative; z-index: 2; width: 100%; max-width: 780px; }

h1 {
  font-weight: 600;
  letter-spacing: -.025em;
  line-height: 1.1;
  color: var(--fg);
  font-size: clamp(26px, 3.9vw, 46px);
  overflow-wrap: break-word;
  text-wrap: balance;
}
h1 .accent {
  display: block;
  margin-top: 12px;
  font-weight: 500;
  letter-spacing: -.01em;
  font-size: clamp(18px, 2.3vw, 25px);
  background: linear-gradient(100deg, var(--blue) 10%, var(--teal) 92%);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}
.note {
  margin-top: 22px;
  font-size: 14px;
  font-weight: 400;
  color: var(--muted);
}

/* ----------------------------- cta ------------------------------- */
.cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 13px;
  margin-top: 30px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 560;
  padding: 11px 22px;
  border-radius: 11px;
  color: #fff;
  background: var(--brandblue);
  box-shadow: 0 4px 14px -8px rgba(26, 115, 232, .55);
  transition: transform .18s var(--ease), box-shadow .25s;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -10px rgba(26, 115, 232, .6);
}
.btn:active { transform: translateY(0); }
.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }
.cta-note { font-family: var(--mono); font-size: 12px; color: var(--faint); }
.cta-note a { text-decoration: underline; text-underline-offset: 3px; }
.cta-note a:hover { color: var(--brandblue); }

/* ----------------------------- footer ---------------------------- */
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(20px, 6vw, 40px);
  border-top: 1px solid var(--line);
}
.site-footer .brand { font-size: 14px; }
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--muted);
}
.footer-meta a { font-family: var(--mono); font-size: 12.5px; }
.footer-meta a:hover { color: var(--brandblue); }

/* ----------------------------- responsive ------------------------ */
@media (max-width: 560px) {
  .hero { padding-top: 84px; }
  .note { margin-top: 20px; }
  .cta { margin-top: 26px; }
  .site-footer { justify-content: center; text-align: center; }
  .footer-meta { justify-content: center; gap: 8px 18px; }
}