:root {
  --bg: #0b0e14;
  --bg-alt: #11151f;
  --text: #e7e9ee;
  --text-muted: #9aa1b2;
  --accent: #6ee7ff;
  --accent-2: #7c5cff;
  --card-bg: #161b28;
  --border: #232838;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-accent {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

/* Hero */
.hero {
  padding: 120px 0 100px;
  text-align: center;
  background:
    radial-gradient(circle at 30% 20%, rgba(124, 92, 255, 0.18), transparent 55%),
    radial-gradient(circle at 70% 10%, rgba(110, 231, 255, 0.14), transparent 50%);
}

.hero-inner {
  max-width: 720px;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
}

.btn-primary {
  display: inline-block;
  background: linear-gradient(120deg, var(--accent-2), var(--accent));
  color: #0b0e14;
  font-weight: 600;
  text-decoration: none;
  padding: 14px 32px;
  border-radius: 999px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
  text-align: center;
}

.section > .container > p {
  max-width: 640px;
  margin: 0 auto;
  color: var(--text-muted);
  text-align: center;
  font-size: 1.05rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.contact {
  text-align: center;
}

.contact .btn-primary {
  margin-top: 28px;
}

/* Footer */
.footer {
  padding: 32px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 720px) {
  .nav {
    display: none;
  }

  .hero {
    padding: 90px 0 70px;
  }

  .hero h1 {
    font-size: 2rem;
  }

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