:root {
  --bg: #020617;
  --bg-soft: #020617;
  --ink: #e5e7eb;
  --muted: #9ca3af;
  --accent: #3b82f6;
  --accent-soft: #1d4ed8;
  --card: #0b1120;
  --border-soft: rgba(148, 163, 184, 0.35);
  --radius: 16px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

/* Layout helpers */

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 56px 0;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(2, 6, 23, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
}

.nav a {
  margin-left: 18px;
  font-size: 14px;
  text-decoration: none;
  color: var(--muted);
}

.nav a:hover {
  color: var(--ink);
}

/* Hero */

.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(180deg, #020617 0%, #0b3b82 55%, #1d4ed8 100%);
  color: #fff;
  text-align: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(255, 255, 255, 0.12), transparent 55%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  padding: 72px 0 48px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(32px, 6vw, 56px);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-subline {
  margin: 0 0 28px;
  font-size: clamp(16px, 2.4vw, 20px);
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, transform 0.08s ease,
    box-shadow 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  color: #fff;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.6);
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.7);
  color: var(--ink);
  border-color: rgba(148, 163, 184, 0.6);
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.95);
}

/* Intro */

.intro {
  background: radial-gradient(circle at top, rgba(37, 99, 235, 0.18), transparent 58%);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 32px;
}

.intro h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 22px;
}

.intro p {
  margin-top: 0;
  color: var(--muted);
}

.bullet-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

/* Cards */

.cards {
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), #020617);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.card {
  background: linear-gradient(145deg, #020617, #020617 45%, #020617 46%, #020617);
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  padding: 20px 18px 22px;
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.7);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 18px;
}

.card p {
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--muted);
}

.card-link {
  font-size: 14px;
  text-decoration: none;
  color: var(--accent);
}

.card-link:hover {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  padding: 18px 0 24px;
  background: #020617;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--ink);
  text-decoration: underline;
}

/* Responsive */

@media (max-width: 800px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    height: auto;
    padding: 10px 0 12px;
    gap: 8px;
  }

  .nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
  }

  .nav a {
    margin: 0;
  }

  .intro-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cards-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    min-height: 60vh;
  }
}