:root {
  --color-bg-primary: #1A1D23;
  --color-bg-secondary: #22262E;
  --color-accent: #8BA3D9;
  --color-accent-soft: rgba(139, 163, 217, 0.15);
  --color-text-primary: #E2E8F0;
  --color-text-secondary: #94A3B8;
  --color-border: rgba(139, 163, 217, 0.12);
  --glass-bg: rgba(26, 29, 35, 0.7);
  --glass-border: rgba(139, 163, 217, 0.15);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.gradient-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(139, 163, 217, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 163, 217, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(26, 29, 35, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
}

.nav-logo {
  color: var(--color-accent);
  font-size: 22px;
}

.nav-title {
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-btn {
  padding: 8px 20px;
  border-radius: 8px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
}

.nav-btn:hover {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

/* Hero */
.hero {
  max-width: 800px;
  margin: 0 auto;
  padding: 140px 24px 80px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
}

.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, #C5D1F0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, #6B8DD6 100%);
  color: #fff;
  box-shadow: 0 4px 24px rgba(139, 163, 217, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(139, 163, 217, 0.4);
}

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

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

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

.btn-icon {
  font-size: 20px;
}

/* Features */
.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: rgba(139, 163, 217, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.feature-icon {
  font-size: 32px;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

/* How it works */
.how {
  max-width: 900px;
  margin: 0 auto;
  padding: 80px 24px;
}

.section-title {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 48px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.step {
  text-align: center;
  padding: 24px;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin: 0 auto 16px;
  border: 1px solid var(--color-border);
}

.step h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* Download */
.download {
  max-width: 700px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.download-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 48px;
  text-align: center;
}

.download-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.download-subtitle {
  color: var(--color-text-secondary);
  font-size: 16px;
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.download-meta {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  color: var(--color-text-secondary);
  font-size: 13px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 14px;
}

.footer-small {
  margin-top: 8px;
  font-size: 12px;
  opacity: 0.6;
}

/* Responsive */
@media (max-width: 640px) {
  .nav {
    padding: 12px 20px;
  }

  .hero {
    padding-top: 120px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }

  .download-card {
    padding: 32px 24px;
  }
}


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