:root {
  --color-bg: #F5F2EA;
  --color-primary: #2A2F27;
  --color-secondary: #1F5C46;
  --color-cta: #1F5C46;
  --color-cta-hover: #184A38;
  --color-cta-text: #F5F2EA;
  --color-text: #1B1F19;
  --color-text-light: #5E645A;
  --color-border: #E4E1D8;
  --color-surface-green: #EAF1EE;
  --color-attention: #A8741A;

  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Source Code Pro", "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5625rem;
  --text-2xl: 1.9375rem;
  --text-3xl: 2.4375rem;
  --text-4xl: 3.0625rem;
}

@font-face {
  font-family: "Source Serif 4";
  src: url("../fonts/SourceSerif4.woff2") format("woff2");
  font-weight: 200 900;
  font-display: swap;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("../fonts/SourceSans3.woff2") format("woff2");
  font-weight: 200 900;
  font-display: swap;
}
@font-face {
  font-family: "Source Code Pro";
  src: url("../fonts/SourceCodePro.woff2") format("woff2");
  font-weight: 200 900;
  font-display: swap;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-variation-settings: "opsz" 24;
  color: var(--color-primary);
  line-height: 1.2;
  margin: 0 0 0.5em;
}
h1 { font-size: var(--text-4xl); letter-spacing: -0.01em; }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); font-weight: 500; }

p { margin: 0 0 1.1em; max-width: 70ch; }
a { color: var(--color-secondary); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

header.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}
header.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
}
.wordmark {
  font-family: var(--font-serif);
  font-weight: 600;
  font-variation-settings: "opsz" 24;
  font-size: 1.4rem;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.01em;
}
nav.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  margin-left: 28px;
  font-size: var(--text-sm);
}
nav.site-nav a:hover { color: var(--color-secondary); }

.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--color-border);
}
.hero .eyebrow {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 14px;
}
.hero h1 { max-width: 18ch; font-size: clamp(2.4rem, 5vw, var(--text-4xl)); }
.hero .container { max-width: 760px; }
.hero .lead { font-size: var(--text-lg); color: var(--color-text-light); max-width: 55ch; }
.hero-chart {
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 20px;
  margin-top: 32px;
}
.hero-chart svg, .hero-chart img { display: block; width: 100%; height: auto; }

.btn {
  display: inline-block;
  background: var(--color-cta);
  color: var(--color-cta-text);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  padding: 13px 26px;
  text-decoration: none;
  border: none;
  cursor: pointer;
}
.btn:hover { background: var(--color-cta-hover); }
.btn-outline {
  display: inline-block;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  padding: 12px 25px;
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
}

section { padding: 56px 0; border-bottom: 1px solid var(--color-border); }
section:last-of-type { border-bottom: none; }

.trust-bar { background: var(--color-surface-green); }
.trust-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.trust-item .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-2xl);
  color: var(--color-secondary);
  display: block;
}
.trust-item .label { color: var(--color-text-light); font-size: var(--text-sm); }

.coa-block {
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 28px;
  margin-top: 24px;
}
.coa-block .status {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-attention);
  border: 1px solid var(--color-attention);
  padding: 3px 8px;
  display: inline-block;
  margin-bottom: 12px;
}

.products-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 24px;
}
.product-card {
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 22px;
}
.product-card h3 { margin-bottom: 4px; }
.product-card .compound-code {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-light);
}
.product-card .price {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-lg);
  color: var(--color-primary);
  display: block;
  margin: 12px 0;
}

.pillars-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 24px;
}

.faq-item { border-top: 1px solid var(--color-border); padding: 18px 0; }
.faq-item summary { font-family: var(--font-serif); font-weight: 500; font-size: var(--text-lg); cursor: pointer; color: var(--color-primary); }
.faq-item p { margin-top: 12px; }

aside.disclaimer {
  background: var(--color-surface-green);
  border: 1px solid var(--color-border);
  padding: 24px;
  font-size: var(--text-sm);
  color: var(--color-text-light);
}
aside.disclaimer strong { color: var(--color-primary); }

footer.site-footer {
  padding: 40px 0;
  font-size: var(--text-sm);
  color: var(--color-text-light);
}
footer.site-footer nav a {
  color: var(--color-text-light);
  text-decoration: none;
  margin-right: 20px;
}

@media (max-width: 720px) {
  .trust-grid, .pillars-grid { grid-template-columns: 1fr; }
  header.site-header .container { flex-direction: column; align-items: flex-start; gap: 12px; }
  nav.site-nav a { margin-left: 0; margin-right: 20px; }
}