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

:root {
  --primary: #2979FF;
  --primary-light: #448AFF;
  --accent: #00E676;
  --accent-light: #69F0AE;
  --bg: #0D1117;
  --surface: #161B22;
  --surface-elevated: #21262D;
  --text: #F0F6FC;
  --text-secondary: #8B949E;
  --text-tertiary: #484F58;
  --border: #30363D;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Starfield background */
.stars {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(1px 1px at 20% 30%, white, transparent),
    radial-gradient(1px 1px at 60% 70%, white, transparent),
    radial-gradient(1px 1px at 50% 50%, white, transparent),
    radial-gradient(2px 2px at 80% 10%, var(--accent), transparent),
    radial-gradient(1px 1px at 90% 60%, white, transparent),
    radial-gradient(1px 1px at 33% 80%, white, transparent),
    radial-gradient(1px 1px at 15% 15%, white, transparent),
    radial-gradient(1px 1px at 70% 90%, white, transparent),
    radial-gradient(2px 2px at 40% 20%, var(--primary), transparent);
  background-size: 200% 200%;
  opacity: 0.6;
  z-index: 0;
  pointer-events: none;
}

header, main, footer {
  position: relative;
  z-index: 1;
}

/* Banner with overlaid nav */
.banner-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.banner-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

@media (min-width: 769px) {
  .banner-wrapper {
    max-height: 75vh;
  }
  .banner-wrapper img {
    height: 75vh;
    object-fit: cover;
    object-position: center;
  }
}

.banner-nav {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 20px 40px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 32px;
  background: linear-gradient(180deg, rgba(0,0,0,0.4) 0%, transparent 100%);
}

.banner-nav a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: color 0.2s;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

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

/* Header (legacy) */
header {
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Hero */
.hero {
  padding: 60px 40px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(41, 121, 255, 0.4);
}

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

.btn-secondary:hover {
  background: var(--surface);
  transform: translateY(-2px);
}

.btn-large {
  padding: 18px 36px;
  font-size: 17px;
}

/* Features */
#features {
  padding: 80px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

#features h2, .download h2, .stats h2 {
  font-size: 42px;
  text-align: center;
  margin-bottom: 48px;
  font-weight: 700;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature {
  background: var(--surface);
  padding: 32px;
  border-radius: 16px;
  border: 1px solid var(--border);
  transition: transform 0.2s, border-color 0.2s;
}

.feature:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
}

.feature-icon {
  font-size: 42px;
  margin-bottom: 16px;
}

.feature h3 {
  font-size: 20px;
  margin-bottom: 12px;
  font-weight: 600;
}

.feature p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* Download section */
.download {
  padding: 80px 40px;
  text-align: center;
  background: linear-gradient(180deg, transparent, rgba(41, 121, 255, 0.05));
}

.download p {
  color: var(--text-secondary);
  font-size: 18px;
  margin-bottom: 32px;
}

.download-badges {
  margin-bottom: 24px;
}

.small {
  font-size: 13px !important;
  color: var(--text-tertiary) !important;
}

/* Stats */
.stats {
  padding: 80px 40px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.stats p {
  font-size: 18px;
  color: var(--text-secondary);
}

/* Footer */
footer {
  padding: 48px 40px 32px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  font-weight: 700;
}

.footer-icon {
  width: 32px;
  height: 32px;
  border-radius: 7px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--accent);
}

.copyright {
  color: var(--text-tertiary);
  font-size: 13px;
}

/* Mobile */
@media (max-width: 768px) {
  .banner-nav { display: none; }
  header { padding: 16px 20px; }
  .nav-links { gap: 20px; }
  .nav-links a { font-size: 13px; }
  .hero { padding: 40px 20px; }
  .subtitle { font-size: 16px; }
  #features, .download, .stats { padding: 60px 20px; }
  #features h2, .download h2, .stats h2 { font-size: 32px; }
}