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

:root {
  --bg: #12121f;
  --bg-card: rgba(255, 255, 255, 0.05);
  --border-card: rgba(255, 255, 255, 0.1);
  --text: #e0e0e0;
  --text-muted: #999;
  --heading: #a8c8e8;
  --accent: #34c759;
  --accent-hover: #2db84d;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

html {
  scroll-behavior: smooth;
}

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

/* Nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--heading);
  font-size: 1.25rem;
  font-weight: 700;
}

.nav-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-link {
  color: var(--heading);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-link:hover {
  color: #fff;
}

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 2rem 3rem;
  max-width: 800px;
  margin: 0 auto;
}

.hero-icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 32px rgba(168, 200, 232, 0.15);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.hero .tagline {
  font-size: 1.35rem;
  color: var(--heading);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 2rem;
}

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

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.15s;
}

.cta-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.cta-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Section shared */
section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section-title {
  text-align: center;
  font-size: 1.75rem;
  color: var(--heading);
  margin-bottom: 2.5rem;
  font-weight: 700;
}

/* How It Works */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 0.5rem;
}

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

/* Screenshots */
.screenshots {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  overflow-x: auto;
  padding: 1rem 0;
  -webkit-overflow-scrolling: touch;
}

.screenshots img {
  height: 420px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  flex-shrink: 0;
}

/* FAQ */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

details {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

summary {
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  color: #fff;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}

details[open] summary::after {
  content: "−";
}

details p {
  padding: 0 1.25rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Footer */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border-card);
  max-width: 1100px;
  margin: 0 auto;
}

.footer-contact {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer-contact a {
  color: var(--heading);
  text-decoration: none;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }

  .hero .tagline {
    font-size: 1.1rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .screenshots img {
    height: 300px;
  }

  section {
    padding: 3rem 1.25rem;
  }
}

@media (max-width: 480px) {
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .screenshots {
    gap: 1rem;
  }

  .screenshots img {
    height: 240px;
  }
}