:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --card: rgba(255, 255, 255, 0.9);
  --text: #101114;
  --muted: #62666d;
  --line: rgba(16, 17, 20, 0.1);
  --accent: #087f8c;
  --accent-soft: rgba(8, 127, 140, 0.1);
  --shadow: 0 18px 50px rgba(22, 27, 35, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", sans-serif;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 5%, rgba(0, 199, 214, 0.13), transparent 30rem),
    radial-gradient(circle at 90% 15%, rgba(66, 133, 244, 0.08), transparent 28rem),
    var(--bg);
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

.site-header,
.site-footer,
main {
  width: min(880px, calc(100% - 32px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
}

.brand {
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
  letter-spacing: -0.02em;
}

nav {
  display: flex;
  gap: 18px;
  font-size: 0.92rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

main {
  padding: 36px 0 70px;
}

.hero,
.card {
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  border-radius: 28px;
}

.hero {
  padding: clamp(30px, 7vw, 64px);
  margin-bottom: 24px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.82rem;
}

h1,
h2 {
  letter-spacing: -0.035em;
  line-height: 1.25;
}

h1 {
  margin: 18px 0 14px;
  font-size: clamp(2rem, 6vw, 3.5rem);
}

h2 {
  margin: 0 0 10px;
  font-size: 1.25rem;
}

p {
  margin: 0.55em 0;
}

.lead {
  color: var(--muted);
  font-size: 1.06rem;
  max-width: 44rem;
}

.stack {
  display: grid;
  gap: 16px;
}

.card {
  padding: clamp(24px, 5vw, 38px);
}

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

.card strong {
  color: var(--text);
}

ul {
  margin: 12px 0 0;
  padding-left: 1.3em;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 18px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 15px;
  color: white;
  background: var(--accent);
  font-weight: 750;
  text-decoration: none;
}

.note {
  margin-top: 14px;
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--muted);
}

.updated {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  padding: 0 0 34px;
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 560px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  main {
    padding-top: 16px;
  }

  .hero,
  .card {
    border-radius: 22px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #090b0e;
    --card: rgba(25, 28, 33, 0.9);
    --text: #f7f8fa;
    --muted: #a8adb5;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #36cad5;
    --accent-soft: rgba(54, 202, 213, 0.12);
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.25);
  }
}