/* Google Health–style theme: white surfaces, Material rounding, Google palette. */
:root {
  --blue: #4285f4;
  --red: #ea4335;
  --yellow: #fbbc04;
  --green: #34a853;
  --ink: #202124;
  --grey: #5f6368;
  --line: #dadce0;
  --bg: #ffffff;
  --soft: #f8f9fa;
  --shadow: 0 1px 2px rgba(60, 64, 67, 0.1), 0 2px 6px rgba(60, 64, 67, 0.08);
  --radius: 16px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 500; font-size: 1.15rem; color: var(--ink); }
.brand img { width: 32px; height: 32px; }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a { color: var(--grey); font-size: 0.95rem; }
.nav a:hover { color: var(--ink); text-decoration: none; }
.btn {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  padding: 10px 22px;
  border-radius: 999px;
  font-weight: 500;
  transition: box-shadow 0.2s, background 0.2s;
}
.btn:hover { text-decoration: none; box-shadow: var(--shadow); background: #3b78e7; }
.btn.ghost { background: transparent; color: var(--blue); border: 1px solid var(--line); }
.btn.ghost:hover { background: var(--soft); }

/* Hero */
.hero { text-align: center; padding: 96px 0 72px; }
.hero img.logo { width: 96px; height: 96px; margin-bottom: 24px; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 500; letter-spacing: -0.5px; margin: 0 0 16px; }
.hero p.lead { font-size: 1.25rem; color: var(--grey); max-width: 660px; margin: 0 auto 32px; }
.hero .cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.gradient-text {
  background: linear-gradient(90deg, var(--blue), var(--green) 45%, var(--yellow) 70%, var(--red));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.pill {
  display: inline-block; font-size: 0.8rem; font-weight: 500; color: var(--grey);
  background: var(--soft); border: 1px solid var(--line); padding: 6px 14px; border-radius: 999px; margin-bottom: 28px;
}

/* Sections */
section { padding: 64px 0; }
section h2 { font-size: 2rem; font-weight: 500; text-align: center; margin: 0 0 12px; }
section .sub { text-align: center; color: var(--grey); max-width: 640px; margin: 0 auto 48px; }
.alt { background: var(--soft); }

/* Cards grid */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card .dot { width: 40px; height: 40px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; margin-bottom: 14px; }
.card h3 { margin: 0 0 6px; font-size: 1.1rem; font-weight: 500; }
.card p { margin: 0; color: var(--grey); font-size: 0.95rem; }
.d-blue { background: rgba(66, 133, 244, 0.12); }
.d-red { background: rgba(234, 67, 53, 0.12); }
.d-yellow { background: rgba(251, 188, 4, 0.16); }
.d-green { background: rgba(52, 168, 83, 0.12); }

/* Steps */
.steps { counter-reset: step; max-width: 760px; margin: 0 auto; display: grid; gap: 20px; }
.step { display: flex; gap: 20px; align-items: flex-start; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.step::before {
  counter-increment: step; content: counter(step);
  flex: 0 0 auto; width: 36px; height: 36px; border-radius: 50%;
  background: var(--blue); color: #fff; font-weight: 500;
  display: flex; align-items: center; justify-content: center;
}
.step h3 { margin: 0 0 6px; font-size: 1.1rem; font-weight: 500; }
.step p { margin: 0; color: var(--grey); }
.step code, .flow code, .prose code {
  background: var(--soft); border: 1px solid var(--line); border-radius: 6px;
  padding: 2px 6px; font-size: 0.88em; font-family: "Roboto Mono", ui-monospace, monospace;
}

/* Flow */
.flow { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.flow .node { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 26px; text-align: center; min-width: 150px; box-shadow: var(--shadow); }
.flow .node strong { display: block; font-weight: 500; }
.flow .node span { color: var(--grey); font-size: 0.85rem; }
.flow .arrow { color: var(--grey); font-size: 1.5rem; }

/* Callout */
.callout { max-width: 760px; margin: 32px auto 0; background: rgba(52, 168, 83, 0.08); border: 1px solid rgba(52, 168, 83, 0.3); border-radius: var(--radius); padding: 20px 24px; color: #1e4620; }
.callout strong { color: var(--green); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0; color: var(--grey); font-size: 0.9rem; }
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.site-footer .brand { font-size: 1rem; }
.site-footer nav a { color: var(--grey); margin-left: 20px; }

/* Legal pages (prose) */
.prose { max-width: 760px; margin: 0 auto; padding: 56px 0; }
.prose h1 { font-size: 2.2rem; font-weight: 500; margin-bottom: 4px; }
.prose .updated { color: var(--grey); margin-bottom: 32px; }
.prose h2 { font-size: 1.35rem; font-weight: 500; margin-top: 36px; }
.prose p, .prose li { color: #3c4043; }
.prose ul { padding-left: 22px; }
.back { display: inline-block; margin-bottom: 24px; color: var(--grey); }

@media (max-width: 640px) {
  .nav .nav-links { display: none; }
  .hero { padding: 64px 0 48px; }
  section { padding: 48px 0; }
}