:root {
  color-scheme: light dark;
  --accent: #2196f3;
  --accent-dark: #1565c0;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #eef4fb;
  --text: #17202a;
  --muted: #526070;
  --border: #d7e0ea;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141b;
    --surface: #161d26;
    --surface-soft: #111821;
    --text: #edf4fb;
    --muted: #b4c0cc;
    --border: #283544;
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.32);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(33, 150, 243, 0.12), transparent 32rem),
    var(--bg);
  color: var(--text);
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

.site-header,
.site-footer {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 24px 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
}

.brand-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
  flex: 0 0 auto;
}

.hero-logo {
  width: 88px;
  height: 88px;
  object-fit: contain;
  margin-bottom: 18px;
  filter: drop-shadow(0 12px 22px rgba(33, 150, 243, 0.18));
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  font-size: 0.95rem;
}

.container {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 56px;
}

.hero {
  padding: 56px min(7vw, 64px);
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(135deg, var(--surface), var(--surface-soft));
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.025em;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.4rem, 7vw, 4.5rem);
}

h2 {
  margin: 42px 0 16px;
  font-size: clamp(1.55rem, 4vw, 2.2rem);
}

h3 {
  margin: 24px 0 8px;
}

p {
  margin: 0 0 16px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.notice {
  margin-top: 26px;
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 14px;
  background: rgba(33, 150, 243, 0.11);
  color: var(--text);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.card,
.content-card {
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.card {
  padding: 20px;
}

.content-card {
  padding: clamp(22px, 4vw, 40px);
}

.card strong {
  display: block;
  margin-bottom: 6px;
}

ul {
  padding-left: 1.2rem;
}

li {
  margin: 0.35rem 0;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding: 34px 22px;
    border-radius: 22px;
  }

  .brand-logo {
    width: 34px;
    height: 34px;
  }

  .hero-logo {
    width: 76px;
    height: 76px;
  }
}