/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #09090b;
  --bg-elevated: #18181b;
  --bg-subtle: #27272a;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --accent: #e4e4e7;
  --accent-bright: #ffffff;
  --border: #27272a;
  --radius: 8px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s;
}

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

.btn-nav {
  background: var(--text) !important;
  color: var(--bg) !important;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 600 !important;
  transition: opacity 0.15s !important;
}

.btn-nav:hover {
  opacity: 0.9;
}

/* Hero */
.hero {
  padding: 160px 0 120px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  background: var(--text);
  color: var(--bg);
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: opacity 0.15s;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: border-color 0.15s;
}

.btn-secondary:hover {
  border-color: var(--text-muted);
}

/* Sections */
.section-label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* Product */
.product {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.product h2 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.product-intro {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 56px;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 56px;
}

.feature {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-elevated);
  transition: border-color 0.2s;
}

.feature:hover {
  border-color: var(--bg-subtle);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-subtle);
  border-radius: 8px;
  margin-bottom: 16px;
  color: var(--accent);
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.cta-block {
  text-align: center;
}

/* About */
.about {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.about h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  max-width: 500px;
}

.about-content {
  max-width: 640px;
  margin-bottom: 48px;
}

.about-content p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.about-content p:last-child {
  margin-bottom: 0;
}

.founder {
  display: flex;
  align-items: center;
  gap: 16px;
}

.founder-info h3 {
  font-size: 1rem;
  font-weight: 600;
}

.founder-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding-top: 48px;
  padding-bottom: 32px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  display: block;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 8px;
  transition: color 0.15s;
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 120px 0 80px;
  }

  .features {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 32px;
  }

  .footer-links {
    gap: 40px;
  }

  .nav-links {
    gap: 20px;
  }

  .nav-links a:not(.btn-nav) {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

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

  .product h2 {
    font-size: 1.75rem;
  }

  .about h2 {
    font-size: 1.5rem;
  }
}