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

:root {
  --bg: #0a0a0a;
  --text: #ffffff;
  --text-muted: #a0a0a0;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --card-bg: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.08);
}

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

.grain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.03;
  z-index: 100;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 24px 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.download-link img {
  height: 40px;
  width: auto;
  transition: opacity 0.3s ease;
}

.download-link img:hover {
  opacity: 0.8;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.5;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translateX(-50%) scale(1.1);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #a0a0a0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(18px, 2vw, 24px);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

.cta-button {
  display: inline-block;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.cta-button img {
  height: 56px;
  width: auto;
}

.features {
  padding: 120px 0;
  position: relative;
}

.features .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

.feature-item {
  padding: 40px 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.feature-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 24px;
  display: block;
}

.feature-item h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.feature-item p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.6;
}

.download {
  padding: 120px 0;
  text-align: center;
  position: relative;
}

.download::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.download .container {
  position: relative;
  z-index: 1;
}

.download h2 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.download p {
  font-size: 20px;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.contact-section {
  padding: 100px 0;
  text-align: center;
  position: relative;
}

.contact-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.contact-section .container {
  position: relative;
  z-index: 1;
}

.contact-section h2 {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.contact-section p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.email-link {
  display: inline-block;
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  padding: 16px 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.3s ease;
}

.email-link:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer p {
  color: var(--text-muted);
  font-size: 14px;
}

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

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

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

@media (max-width: 768px) {
  .header {
    padding: 16px 0;
  }

  .logo {
    font-size: 20px;
  }

  .download-link img {
    height: 36px;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .cta-button img {
    height: 48px;
  }

  .features {
    padding: 80px 0;
  }

  .features .container {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-item {
    padding: 32px 24px;
  }

  .download {
    padding: 80px 0;
  }

  .download h2 {
    font-size: 36px;
  }

  .download p {
    font-size: 18px;
  }

  .contact-section {
    padding: 80px 0;
  }

  .contact-section h2 {
    font-size: 32px;
  }

  .contact-section p {
    font-size: 16px;
  }

  .email-link {
    font-size: 18px;
    padding: 14px 24px;
  }

  .footer .container {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    gap: 24px;
  }
}