@font-face {
  font-family: 'Oxanium';
  src: url('/assets/fonts/Oxanium-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

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

:root {
  --carbon: #0a0a0a;
  --graphite: #404040;
  --slate: #6b7280;
  --silver: #9ca3af;
  --mist: #f3f4f6;
  --white: #ffffff;
  --isotope: #3b82f6;
  --isotope-dim: rgba(59, 130, 246, 0.1);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--white);
  color: var(--carbon);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-text {
  font-family: 'Oxanium', sans-serif;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.5px;
}

.logo-accent {
  color: var(--isotope);
}

nav {
  display: flex;
  gap: 32px;
  font-size: 14px;
  font-weight: 400;
  color: var(--graphite);
}

nav a:hover {
  color: var(--carbon);
}

/* Hero */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 48px 100px;
}

.hero-split {
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-molecule {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-content {
  flex: 1;
}

.hero h1 {
  font-size: 48px;
  font-weight: 600;
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero p {
  font-size: 20px;
  color: var(--slate);
  max-width: 500px;
  margin-bottom: 32px;
  font-weight: 300;
}

.cta-group {
  display: flex;
  gap: 16px;
}

.btn {
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--carbon);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--graphite);
}

.btn-secondary {
  background: var(--mist);
  color: var(--carbon);
}

.btn-secondary:hover {
  background: #e5e7eb;
}

/* 3D Atom */
#atom-canvas {
  width: 400px;
  height: 350px;
}

/* Products */
.products {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px 60px;
}

.section-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--silver);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.products h2 {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -1px;
  margin-bottom: 60px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.product-card {
  padding: 32px;
  border: 1px solid var(--mist);
  border-radius: 12px;
  transition: all 0.2s;
}

.product-card:hover {
  border-color: #e5e7eb;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.product-card h3 {
  font-family: 'Oxanium', sans-serif;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.product-card .tag {
  font-size: 10px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--mist);
  color: var(--slate);
}

.product-card .tag-product {
  background: var(--isotope-dim);
  color: var(--isotope);
}

.product-card p {
  color: var(--slate);
  font-size: 15px;
}

.product-card a {
  display: block;
  color: inherit;
}

.product-card a:hover h3 {
  color: var(--isotope);
}

.section-closing {
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.5px;
  color: var(--graphite);
  text-align: center;
  margin-top: 48px;
}

/* Philosophy */
.philosophy {
  background: var(--mist);
  padding: 60px 48px;
}

.philosophy-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.philosophy h2 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.philosophy p {
  color: var(--graphite);
  font-size: 18px;
  line-height: 1.8;
}

/* Contribute */
.contribute {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 48px;
  text-align: center;
}

.contribute h2 {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.contribute p {
  color: var(--slate);
  margin-bottom: 32px;
}

/* Footer */
footer {
  border-top: 1px solid var(--mist);
  padding: 48px;
  text-align: center;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 14px;
  color: var(--slate);
}

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

.tagline {
  font-size: 15px;
  color: var(--slate);
  letter-spacing: 0.5px;
  font-weight: 400;
}

.copyright {
  font-size: 14px;
  color: var(--silver);
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 20px 24px;
    flex-direction: column;
    gap: 20px;
  }

  nav {
    gap: 20px;
  }

  .hero {
    padding: 40px 24px 60px;
  }

  .hero-split {
    flex-direction: column;
    gap: 40px;
  }

  .hero-content {
    text-align: center;
  }

  .hero h1 {
    font-size: 36px;
    letter-spacing: -1px;
  }

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

  .cta-group {
    flex-direction: column;
    align-items: center;
  }

  #atom-canvas {
    width: 300px;
    height: 260px;
  }

  .products {
    padding: 0 24px 80px;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .philosophy {
    padding: 60px 24px;
  }

  .contribute {
    padding: 80px 24px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 20px;
  }
}