/* --------------------------------------------------
   GLOBAL THEME — DARK FUTURISTIC + NEON BLUE
-------------------------------------------------- */

:root {
  --bg-dark: #0a0f1c;
  --bg-darker: #05070d;
  --text-light: #e6e9f0;
  --text-muted: #9aa0b8;
  --neon-blue: #3a8bff;
  --neon-blue-glow: #4da3ff;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --transition-fast: 0.25s ease;
  --transition-slow: 0.6s ease;
  --radius: 14px;
  --max-width: 1200px;
  --font-main: "Inter", sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg-dark);
  color: var(--text-light);
  font-family: var(--font-main);
  overflow-x: hidden;
}

/* --------------------------------------------------
   NAVBAR
-------------------------------------------------- */

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  background: var(--bg-darker);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
  height: 48px;
}

.brand {
  margin-left: 12px;
  font-size: 20px;
  font-weight: 600;
  color: var(--neon-blue);
}

.nav-links a {
  margin: 0 16px;
  color: var(--text-light);
  text-decoration: none;
  font-size: 15px;
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: var(--neon-blue);
  text-shadow: 0 0 8px var(--neon-blue-glow);
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--neon-blue);
}

/* --------------------------------------------------
   HERO SECTION — ANIMATED GRADIENT WAVES
-------------------------------------------------- */

.hero {
  position: relative;
  height: 78vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0a0f1c, #0d1224);
  z-index: 1;
}

/* Animated gradient waves */
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--neon-blue) 0%, transparent 70%);
  opacity: 0.12;
  animation: waveMove 12s infinite linear;
}

.hero::after {
  animation-duration: 18s;
  opacity: 0.18;
}

@keyframes waveMove {
  0% { transform: translate(-20%, -20%) rotate(0deg); }
  100% { transform: translate(20%, 20%) rotate(360deg); }
}

.hero-content {
  z-index: 2;
  max-width: 800px;
  padding: 20px;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 18px;
  color: var(--neon-blue);
  text-shadow: 0 0 12px var(--neon-blue-glow);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.cta-button {
  padding: 14px 28px;
  background: var(--neon-blue);
  color: #fff;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-fast);
}

.cta-button:hover {
  background: var(--neon-blue-glow);
  box-shadow: 0 0 18px var(--neon-blue-glow);
}

/* --------------------------------------------------
   FEATURES — GLASSMORPHISM CARDS
-------------------------------------------------- */

.features {
  padding: 80px 40px;
  max-width: var(--max-width);
  margin: auto;
}

.section-title {
  text-align: center;
  font-size: 32px;
  margin-bottom: 40px;
  color: var(--neon-blue);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  transition: var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--neon-blue);
  box-shadow: 0 0 18px rgba(58, 139, 255, 0.3);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 12px;
  color: var(--neon-blue);
}

/* --------------------------------------------------
   FOOTER
-------------------------------------------------- */

.footer {
  text-align: center;
  padding: 28px;
  margin-top: 40px;
  background: var(--bg-darker);
  color: var(--text-muted);
  font-size: 14px;
}

/* --------------------------------------------------
   RESPONSIVE
-------------------------------------------------- */

@media (max-width: 768px) {
  .hero-title {
    font-size: 34px;
  }
  .navbar {
    flex-direction: column;
    text-align: center;
  }
  .nav-links {
    margin-top: 12px;
  }
}