:root {
  --bg-color: #0f0f10;
  --card-bg: #1a1a1c;
  --text-main: #f0f0f0;
  --text-muted: #a0a0a0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --gradient-start: #3b82f6;
  --gradient-end: #8b5cf6;
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --max-width: 1000px;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  text-decoration: underline;
}

/* Header */
header {
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.logo a {
  color: inherit;
  text-decoration: none;
  font-weight: inherit;
  font-size: inherit;
}

.nav-links a {
  color: var(--text-muted);
  margin-left: 1.5rem;
  font-size: 0.9rem;
}

.nav-links a:hover {
  color: #fff;
  text-decoration: none;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 5rem 1rem;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 0%, #a5a5a5 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-store {
  display: inline-flex;
  align-items: center;
  background-color: #fff;
  color: #000;
  padding: 0.8rem 1.5rem;
  border-radius: 99px;
  font-weight: 600;
  transition: transform 0.2s, opacity 0.2s;
}

.btn-store:hover {
  text-decoration: none;
  transform: translateY(-2px);
  opacity: 0.9;
}

.btn-store img {
  height: 24px;
  margin-right: 0.5rem;
}

/* Video Section */
.video-showcase {
  max-width: var(--max-width);
  margin: 3rem auto 5rem;
  padding: 0 1rem;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  /* 16:9 ratio */
  height: 0;
  overflow: hidden;
  border-radius: 12px;
  background: #2a2a2d;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.video-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.video-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto 5rem;
  padding: 0 1rem;
}

.feature-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid #333;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Update Info */
.updates {
  max-width: 600px;
  margin: 0 auto 5rem;
  padding: 0 1rem;
}

.update-item {
  border-left: 2px solid var(--accent);
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

.update-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.update-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  border-top: 1px solid #333;
  padding: 3rem 1rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

footer a {
  color: var(--text-muted);
  margin: 0 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  header {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links a {
    margin-left: 0.75rem;
    margin-right: 0.75rem;
  }

  .download-buttons {
    flex-direction: column;
    align-items: stretch;
    max-width: 300px;
    margin: 0 auto;
  }

  .btn-store {
    justify-content: center;
  }
}