/* ==========================================================================
   Base — Reset, Typography, Links
   ========================================================================== */

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

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  overflow-x: hidden;
}

a {
  color: var(--brand-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-teal);
  text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-top: 0;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

img {
  max-width: 100%;
  height: auto;
}

code, pre, .font-mono {
  font-family: var(--font-mono);
}

pre {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  overflow-x: auto;
  color: var(--text-primary);
}

code {
  background: var(--bg-surface);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
  color: var(--accent-teal);
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

::selection {
  background: rgba(0, 168, 90, 0.3);
  color: var(--text-primary);
}

/* Section header pattern */
.section-header {
  text-align: center;
  padding-bottom: 40px;
}
.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  position: relative;
  display: inline-block;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-header p {
  max-width: 640px;
  margin: 12px auto 0;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Utility: gradient text */
.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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