:root {
  --bg: #ffffff;
  --fg: #14171c;
  --muted: #5b6370;
  --card: #f4f6f8;
  --line: #e3e7ec;
  --accent: #0f766e;
  --accent-fg: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1013;
    --fg: #e8eaed;
    --muted: #9aa3ad;
    --card: #171a1f;
    --line: #262a31;
    --accent: #2dd4bf;
    --accent-fg: #0e1013;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: inherit; }

.wrap { max-width: 960px; margin-left: auto; margin-right: auto; padding-left: 20px; padding-right: 20px; }

.top { position: sticky; top: 0; background: var(--bg); border-bottom: 1px solid var(--line); z-index: 1; }
.bar { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; text-decoration: none; }
nav { display: flex; gap: 20px; }
nav a { text-decoration: none; color: var(--muted); font-size: 15px; }
nav a:hover { color: var(--fg); }

.hero { padding: 96px 0 0; }
h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.1; margin: 0 0 20px; letter-spacing: -0.02em; }
.lead { font-size: 19px; color: var(--muted); max-width: 620px; margin: 0 0 32px; }

section { margin-bottom: 72px; }
h2 { font-size: 28px; margin: 0 0 24px; }
h3 { margin: 0 0 8px; font-size: 19px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.card p { margin: 0; color: var(--muted); }
.product { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.product > div { flex: 1 1 360px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-fg);
  text-decoration: none;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 10px;
}
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn:hover { filter: brightness(1.08); }

.contact p { color: var(--muted); margin: 0 0 20px; }
.foot { border-top: 1px solid var(--line); padding-top: 24px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }

@media (max-width: 560px) {
  nav { gap: 14px; }
  nav a { font-size: 14px; }
  .hero { padding: 64px 0 48px; }
}