:root {
  --bg-deep: #030611;
  --bg-card: #0a1122;
  --bg-card-elevated: #111a33;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(0, 242, 254, 0.4);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --cyan: #00f2fe;
  --blue: #4facfe;
  --accent-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --accent-glow: 0 0 35px rgba(0, 242, 254, 0.35);

  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
}

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

body {
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Ambient glow spheres */
.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
}
.glow-1 {
  width: 600px;
  height: 600px;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, rgba(79, 172, 254, 0.05) 70%, transparent 100%);
}
.glow-2 {
  width: 500px;
  height: 500px;
  top: 450px;
  right: -100px;
  background: radial-gradient(circle, rgba(147, 51, 234, 0.12) 0%, transparent 70%);
}

/* Nav Bar */
.nav-bar {
  position: relative;
  z-index: 10;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-icon {
  font-size: 24px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  background: rgba(0, 242, 254, 0.1);
  color: var(--cyan);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s ease;
}
.nav-link:hover {
  color: var(--text-main);
}

/* Hero Section */
.hero-container {
  position: relative;
  z-index: 10;
  max-width: 900px;
  width: 100%;
  margin: 40px auto 80px;
  padding: 0 24px;
  text-align: center;
  flex: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  background: rgba(0, 242, 254, 0.08);
  color: var(--cyan);
  border: 1px solid var(--border-accent);
  padding: 6px 14px;
  border-radius: 30px;
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-headline {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 24px rgba(0, 242, 254, 0.4));
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 720px;
  margin: 0 auto 40px;
}

/* CTA Card */
.cta-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 36px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  position: relative;
  overflow: hidden;
  margin-bottom: 60px;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
}

.cta-details {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}
.os-icon {
  font-size: 44px;
}
.os-info {
  text-align: left;
}
.os-info h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
}
.os-info p {
  color: var(--text-dim);
  font-size: 13px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 12px;
  font-family: var(--font-body);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
}

.btn-download {
  background: var(--accent-gradient);
  color: #030712;
  padding: 16px 36px;
  box-shadow: var(--accent-glow);
  transform: translateY(0);
}
.btn-download:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 45px rgba(0, 242, 254, 0.6);
  transform: translateY(-2px);
}
.btn-download .btn-icon {
  font-size: 28px;
}
.btn-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}
.primary-text {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.2px;
}
.sub-text {
  font-size: 11px;
  opacity: 0.85;
  font-weight: 600;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #030712;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 8px;
}
.btn-sm {
  font-size: 13px;
}

.cta-perks {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
  flex-wrap: wrap;
}

/* Story Section */
.story-section {
  margin-bottom: 60px;
}
.story-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 40px;
  text-align: left;
}
.story-tag {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--cyan);
  margin-bottom: 8px;
}
.story-card h2 {
  font-family: var(--font-display);
  font-size: 26px;
  margin-bottom: 16px;
}
.story-content p {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 14px;
  line-height: 1.7;
}

/* Features Grid */
.features-section {
  margin-bottom: 60px;
}
.section-title {
  margin-bottom: 36px;
}
.section-title h2 {
  font-family: var(--font-display);
  font-size: 32px;
  margin-bottom: 8px;
}
.section-title p {
  color: var(--text-dim);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  text-align: left;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 28px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
}
.feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.6;
}

/* Footer */
.app-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 24px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  margin-top: auto;
}
.app-footer a {
  color: var(--cyan);
  text-decoration: none;
}