:root {
  --bg: #090d16;
  --bg-alt: #0f172a;
  --card-bg: #141e33;
  --border: #1e293b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #38bdf8;
  --primary-hover: #0ea5e9;
  --accent: #818cf8;
  --max-w: 1140px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(9, 13, 22, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.15s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: #04101e;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-muted);
}

.btn-sm {
  padding: 0.45rem 1rem;
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary) !important;
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 6px;
}

.btn-sm:hover {
  background: var(--primary);
  color: #04101e !important;
}

/* Hero */
.hero {
  padding: 6rem 0 5rem;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(56, 189, 248, 0.08) 0%, transparent 60%);
}

.hero-content {
  max-width: 820px;
}

.pill-badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary);
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.85rem;
  border-radius: 9999px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Section Common */
.section {
  padding: 5rem 0;
}

.bg-alt {
  background-color: var(--bg-alt);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.5rem;
}

.section-header h2 {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.75rem;
}

/* Cards & Boxes */
.card, .feature-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover, .feature-box:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1rem;
}

.feature-box h3, .card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.feature-box p, .card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.module-list {
  list-style: none;
  margin-top: 1rem;
}

.module-list li {
  color: var(--text-muted);
  font-size: 0.92rem;
  padding: 0.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.module-list li strong {
  color: var(--text);
}

.badge-sub {
  display: inline-block;
  margin-top: 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.08);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

/* Contact */
.contact-container {
  max-width: 760px;
}

.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem;
  text-align: center;
}

.contact-info h3 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.contact-info p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.email-link {
  display: inline-block;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease;
  margin-bottom: 1.5rem;
}

.email-link:hover {
  border-bottom-color: var(--primary);
}

.contact-note {
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  background: var(--bg);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand strong {
  color: var(--text);
  font-size: 1.1rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.footer-meta p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-wrap {
    flex-direction: column;
    height: auto;
    padding: 1.25rem 0;
    gap: 1rem;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  .hero {
    padding: 4rem 0 3.5rem;
  }
  .section {
    padding: 3.5rem 0;
  }
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}