:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f4f4;
  --color-bg-dark: #101213;
  --color-accent: #b4cece;
  --color-accent-dark: #7eaaaa;
  --color-text: #101213;
  --color-text-muted: #6b7280;
  --color-text-on-dark: #f4f4f4;
  --color-border: #d1dbdb;
  --color-card: #f4f4f4;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--color-text); text-decoration: none; }
a:hover { color: var(--color-accent-dark); }

h1, h2, h3, h4, h5 { line-height: 1.2; font-weight: 800; }
h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; font-weight: 700; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  background: var(--color-bg-dark);
  color: #ffffff;
  font-weight: 600;
  border-radius: 4px;
  transition: opacity 0.2s;
  border: 2px solid var(--color-bg-dark);
  cursor: pointer;
  font-size: 0.95rem;
}
.btn:hover { opacity: 0.8; text-decoration: none; color: #ffffff; }
.btn-outline { background: transparent; color: var(--color-bg-dark); }
.btn-outline:hover { background: var(--color-bg-dark); color: #ffffff; opacity: 1; }
.btn-light { background: #ffffff; color: var(--color-bg-dark); border-color: #ffffff; }
.btn-light:hover { opacity: 0.85; color: var(--color-bg-dark); }
.btn-light-outline { background: transparent; border-color: rgba(255,255,255,0.5); color: #ffffff; }
.btn-light-outline:hover { background: rgba(255,255,255,0.1); opacity: 1; color: #ffffff; }

.section { padding: 3.5rem 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-bg-dark); color: var(--color-text-on-dark); }

.accent { color: var(--color-accent-dark); }
.muted { color: var(--color-text-muted); }

.card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 2rem;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--color-accent); }

.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }

.tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  background: rgba(180,206,206,0.2);
  border: 1px solid var(--color-accent);
  color: var(--color-accent-dark);
  border-radius: 100px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}
.eyebrow::before {
  content: '';
  display: block;
  width: 2rem;
  height: 2px;
  background: var(--color-accent);
  flex-shrink: 0;
}