:root {
  --bg: #f8fafc;
  --bg-soft: #eef2f7;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #1f5bff;
  --border: #e2e8f0;
  --shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(248, 250, 252, 0.95);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

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

.brand {
  font-weight: 700;
  color: var(--text);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a.active {
  color: var(--text);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 8px;
}

.hero {
  padding: 64px 0 48px;
  background: var(--bg-soft);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
}

.hero-note {
  margin-top: 24px;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: #eaf1ff;
  border-radius: 12px;
}

.section {
  padding: 48px 0;
}

.section h2 {
  margin: 0 0 16px;
  font-size: 1.4rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.info-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  box-shadow: var(--shadow);
}

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

.info-list {
  margin: 0 0 16px;
  padding-left: 20px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 48px;
  color: var(--muted);
  background: #f1f5f9;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    right: 20px;
    top: 64px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px;
    flex-direction: column;
    align-items: flex-start;
    display: none;
    min-width: 220px;
  }

  .nav-links.open {
    display: flex;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }
}