body {
  margin: 0;
  font-family: 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  background: #070813;
  color: #fff;
  min-height: 100vh;
}

.swift-bg {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, rgba(7,8,19,0.98) 70%, rgba(0,5,30,0.92)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 80px);
}

.swift-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(120deg, #1a1e3a55 0%, #0ff1 100%);
  opacity: 0.4;
  animation: bg-move 12s ease-in-out infinite alternate;
  pointer-events: none;
}

.swift-bg::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 120vw;
  height: 120vh;
  background: radial-gradient(circle at 60% 30%, #2a3cff22 0%, transparent 70%);
  opacity: 0.25;
  transform: translate(-50%, -20%) scale(1.1);
  animation: light-move 18s linear infinite alternate;
  z-index: 0;
  pointer-events: none;
}

@keyframes bg-move {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}
@keyframes light-move {
  0% { left: 40%; top: 0%; opacity: 0.2; }
  50% { left: 60%; top: 10%; opacity: 0.3; }
  100% { left: 50%; top: 0%; opacity: 0.2; }
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 32px 48px 0 48px;
  position: relative;
  z-index: 1;
}

.logo-img {
  height: 48px;
  filter: drop-shadow(0 2px 8px #0008);
}

.navbar-links {
  display: flex;
  gap: 18px;
}

.btn {
  padding: 12px 28px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.25s cubic-bezier(.4,2,.6,1), box-shadow 0.25s cubic-bezier(.4,2,.6,1), color 0.2s, transform 0.18s cubic-bezier(.4,2,.6,1);
  box-shadow: 0 2px 16px 0 #0004;
  border: none;
  outline: none;
  cursor: pointer;
  display: inline-block;
  position: relative;
  z-index: 1;
  will-change: transform, box-shadow, background;
  overflow: hidden;
}
.btn.primary {
  background: #23284a;
  color: #fff;
  box-shadow: 0 0 16px #2a3cff33;
}
.btn.primary::before {
  content: '';
  position: absolute;
  left: -60%;
  top: 0;
  width: 220%;
  height: 100%;
  background: linear-gradient(90deg, transparent 0%, #2a3cff 40%, #0ff 60%, transparent 100%);
  opacity: 0.18;
  transition: left 0.5s cubic-bezier(.4,2,.6,1);
  z-index: 0;
  pointer-events: none;
}
.btn.primary:hover::before, .btn.primary:focus::before {
  left: 0%;
  opacity: 0.32;
  transition: left 0.5s cubic-bezier(.4,2,.6,1), opacity 0.3s;
}
.btn.primary:hover, .btn.primary:focus {
  color: #fff;
  box-shadow: 0 0 32px #2a3cff77, 0 0 8px #0ff8;
  transform: translateY(-3px) scale(1.04) rotate(-1deg);
}
.btn.primary span {
  position: relative;
  z-index: 1;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 60px;
  margin-bottom: 60px;
  position: relative;
  z-index: 1;
}
.hero-title {
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-shadow: 0 4px 24px #000a, 0 2px 0 #2a3cff;
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: 1.3rem;
  color: #c7d0ff;
  margin-bottom: 32px;
}
.hero-buttons {
  display: flex;
  gap: 18px;
}

.features {
  margin: 0 auto;
  max-width: 1100px;
  padding: 40px 16px 80px 16px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.features-title {
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 8px;
  margin-top: 0;
}
.features-subtitle {
  color: #b0b8d8;
  margin-bottom: 40px;
}
.features-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
}
.feature-card {
  background: rgba(20, 24, 48, 0.85);
  border-radius: 18px;
  box-shadow: 0 4px 32px #0006, 0 0 0 1.5px #2a3cff44;
  padding: 32px 28px 28px 28px;
  min-width: 260px;
  max-width: 320px;
  flex: 1 1 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.15s, box-shadow 0.15s;
}
.feature-card:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 8px 40px #2a3cff77, 0 0 0 2px #0ff8;
}
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: #2a3cff;
  text-shadow: 0 2px 8px #0ff4;
}
@media (max-width: 900px) {
  .features-cards {
    flex-direction: column;
    align-items: center;
  }
  .navbar {
    flex-direction: column;
    gap: 18px;
    padding: 32px 16px 0 16px;
  }
}
@media (max-width: 600px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .feature-card {
    min-width: 90vw;
    max-width: 98vw;
  }
}