:root {
  color-scheme: light dark;
  --bg: #07111f;
  --surface: #0d1b2a;
  --surface-2: #12263d;
  --text: #f7fbff;
  --muted: #9fb1c8;
  --line: #21344c;
  --mint: #38efad;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 36px 22px 72px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  line-height: 1.65;
}

nav,
main,
footer {
  width: min(820px, 100%);
  margin: 0 auto;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-bottom: 18px;
  margin-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

nav a,
a {
  color: var(--mint);
  font-weight: 700;
  text-decoration: none;
}

h1 {
  margin: 0 0 6px;
  font-size: clamp(2.2rem, 8vw, 4rem);
  line-height: 1.05;
}

h2 {
  margin: 34px 0 8px;
  font-size: 1.2rem;
}

p {
  margin: 8px 0;
}

.eyebrow,
.effective,
.answer,
footer {
  color: var(--muted);
}

.eyebrow {
  margin-bottom: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lead {
  max-width: 680px;
  margin: 0 0 34px;
  color: var(--muted);
  font-size: 1.25rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}

.card {
  display: block;
  min-height: 150px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
}

.card span {
  display: block;
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 800;
}

.card p {
  color: var(--muted);
}

.question {
  margin-top: 22px;
  font-weight: 800;
}

footer {
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7fbff;
    --surface: #ffffff;
    --surface-2: #eaf2fb;
    --text: #07111f;
    --muted: #52657c;
    --line: #dbe6f1;
    --mint: #0f9f73;
  }
}