:root {
  --mint: #14e0b5;
  --teal: #06b6d4;
  --sky: #3b82f6;
  --indigo: #6366f1;
  --bg: #f3f6fb;
  --surface: #ffffff;
  --stroke: #e2e8f0;
  --text: #0b1220;
  --text-2: #5b6b82;
  --text-3: #94a3b8;
  --brand: linear-gradient(135deg, var(--mint), var(--teal) 50%, var(--sky));
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.07);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #060a13;
    --surface: #0f1623;
    --stroke: #1e293b;
    --text: #f1f5f9;
    --text-2: #94a3b8;
    --text-3: #64748b;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

/* Soft aurora behind the page — static gradients, no blur. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(40rem 30rem at 10% -5%, rgba(20, 224, 181, 0.22), transparent 70%),
    radial-gradient(40rem 30rem at 95% 10%, rgba(59, 130, 246, 0.2), transparent 70%),
    radial-gradient(36rem 28rem at 40% 105%, rgba(99, 102, 241, 0.16), transparent 70%);
}

a { color: var(--teal); text-decoration: none; font-weight: 600; }
a:hover { text-decoration: underline; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}

.brand { display: flex; align-items: center; gap: 12px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--brand);
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px rgba(6, 182, 212, 0.35);
  flex-shrink: 0;
}
.brand-mark svg { width: 20px; height: 20px; }
.brand-name { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.01em; }
.brand-name span { background: var(--brand); -webkit-background-clip: text; background-clip: text; color: transparent; }

nav.links { display: flex; gap: 18px; flex-wrap: wrap; font-size: 0.95rem; }
nav.links a { color: var(--text-2); }
nav.links a[aria-current="page"] { color: var(--text); }

.hero { text-align: center; padding: 56px 0 40px; }
.hero .brand-mark { width: 96px; height: 96px; border-radius: 28px; margin: 0 auto 24px; }
.hero .brand-mark svg { width: 46px; height: 46px; }
.hero h1 { font-size: clamp(2.2rem, 7vw, 3.2rem); line-height: 1.1; margin: 0 0 12px; letter-spacing: -0.02em; }
.hero p { color: var(--text-2); font-size: 1.15rem; margin: 0 auto; max-width: 34rem; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 8px 0 40px; }
.feature, .card, .section {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.feature { padding: 18px; }
.feature strong { display: block; margin-bottom: 4px; }
.feature span { color: var(--text-2); font-size: 0.95rem; }

.doc-head { padding: 28px 0 8px; }
.doc-head h1 { font-size: clamp(1.9rem, 6vw, 2.5rem); margin: 0 0 4px; letter-spacing: -0.02em; }
.updated { color: var(--text-3); font-size: 0.9rem; margin: 0; }
.intro { color: var(--text-2); font-size: 1.08rem; margin: 18px 0 22px; }

.section { padding: 18px 20px; margin-bottom: 12px; }
.section h2 { display: flex; align-items: center; gap: 10px; font-size: 1.08rem; margin: 0 0 6px; }
.section h2 .num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 0.78rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.section p { margin: 0; color: var(--text-2); }
.section p + p { margin-top: 8px; }

.card { padding: 22px; margin-bottom: 14px; }
.card h2 { margin: 0 0 6px; font-size: 1.15rem; }
.card p { margin: 0; color: var(--text-2); }
.card p + p { margin-top: 8px; }

.button {
  display: inline-block;
  margin-top: 14px;
  padding: 12px 20px;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
}
.button:hover { text-decoration: none; filter: brightness(1.05); }

footer.site {
  color: var(--text-3);
  font-size: 0.88rem;
  padding: 36px 0 44px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: space-between;
}
footer.site nav { display: flex; gap: 16px; flex-wrap: wrap; }
footer.site a { color: var(--text-2); font-weight: 500; }