:root {
  color-scheme: light;
  --paper: #f5efe1;
  --paper-dark: #ece1c7;
  --ink: #221d15;
  --ink-soft: rgba(34, 29, 21, 0.68);
  --line: rgba(34, 29, 21, 0.18);
  --amber: #a8632c;
  --bottle: #253d32;
  --bottle-line: rgba(255, 255, 255, 0.16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Newsreader", serif;
  background: var(--paper);
  color: var(--ink);
}
.mono, .site-header, .tag, .article-item .meta, .read-more, .button, .footer-copy {
  font-family: "IBM Plex Mono", monospace;
}
h1, h2, h3 { font-family: "Newsreader", serif; font-weight: 600; letter-spacing: -0.01em; margin: 0; }
a { color: inherit; text-decoration: none; }
.page { min-height: 100vh; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; position: relative; z-index: 1; }

/* ─── HEADER ────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; flex-wrap: wrap; }
.brand-block { display: inline-flex; flex-direction: column; gap: 3px; }
.brand {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.signature {
  font-family: "Newsreader", serif;
  font-style: italic;
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.topnav { display: flex; gap: 22px; flex-wrap: wrap; font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-soft); }
.topnav a:hover { color: var(--ink); }

/* ─── HERO ──────────────────────────────────────── */
.hero-section {
  padding: 84px 0 76px;
  border-bottom: 1px solid var(--line);
}
.hero-grid { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 56px; align-items: center; }
.hero-content { max-width: 720px; }

/* ─── FIGURE (product exhibit) ──────────────────── */
.figure { border: 1px solid var(--line); padding: 28px; background: #fdfaf3; text-align: center; }
.figure img { max-width: 100%; height: auto; display: block; margin: 0 auto; }
.figure figcaption {
  margin-top: 18px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.figure.is-compact { padding: 20px; }
.figure-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 32px 0; }
.logo-figure { display: flex; align-items: center; gap: 20px; border: 1px solid var(--line); padding: 24px 28px; background: #fdfaf3; }
.logo-figure img { height: 34px; width: auto; flex-shrink: 0; }
.logo-figure p { margin: 0; font-size: 0.9rem; color: var(--ink-soft); }
.fade-up { animation: fadeUp 0.7s ease both; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-kicker {
  display: inline-block;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--amber);
  margin-bottom: 30px;
}
.hero-title {
  font-size: clamp(2.3rem, 4.6vw, 3.4rem);
  line-height: 1.15;
  margin-bottom: 22px;
}
.hero-subtitle {
  font-style: italic;
  font-size: 1.3rem;
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 42ch;
  margin: 0 0 22px;
}
.hero-text { font-size: 1.05rem; line-height: 1.8; color: var(--ink-soft); max-width: 58ch; margin: 0; }

.button-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 3px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  transition: background 160ms ease, color 160ms ease;
}
.button-primary { background: var(--ink); color: var(--paper); }
.button-primary:hover { background: transparent; color: var(--ink); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border: 1px solid var(--line);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.tag.on-dark { border-color: var(--bottle-line); color: rgba(255, 255, 255, 0.75); }

.section { padding: 84px 0; }
.section-cream { background: var(--paper-dark); }
.section-intro { max-width: 640px; margin-bottom: 52px; }
.section-label {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  color: var(--amber);
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
}
.section h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin-bottom: 16px; }
.section p { line-height: 1.8; color: var(--ink-soft); }

/* ─── PROTOCOL STEPS ────────────────────────────── */
.protocol-list { display: grid; gap: 2px; background: var(--line); border: 1px solid var(--line); }
.protocol-step { background: var(--paper); padding: 30px 32px; border-left: 3px solid var(--amber); }
.section-cream .protocol-step { background: var(--paper-dark); }
.protocol-step .step-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 10px;
  display: block;
}
.protocol-step h3 { font-size: 1.3rem; margin-bottom: 8px; }
.protocol-step p { margin: 0; max-width: 66ch; }

/* ─── ARTICLE LIST ──────────────────────────────── */
.article-list { border-top: 1px solid var(--line); }
.article-item { display: block; padding: 32px 0; border-bottom: 1px solid var(--line); transition: opacity 160ms ease; }
.article-item:hover { opacity: 0.65; }
.article-item .meta {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 12px;
}
.article-item h3 { font-size: 1.5rem; margin-bottom: 10px; }
.article-item p { margin: 0 0 14px; color: var(--ink-soft); max-width: 66ch; line-height: 1.75; }
.read-more { font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); }

/* ─── CHECKLIST ─────────────────────────────────── */
.checklist-box { border: 1px solid var(--line); padding: 8px 32px; }
.feature-list { list-style: none; margin: 0; padding: 0; }
.feature-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  line-height: 1.6;
}
.feature-list li:last-child { border-bottom: none; }
.feature-list li::before { content: "— "; color: var(--amber); font-family: "IBM Plex Mono", monospace; }

/* ─── CTA CARD ──────────────────────────────────── */
.cta-card { background: var(--bottle); color: #fff; padding: 48px; }
.cta-card .section-label { color: rgba(255, 255, 255, 0.6); }
.cta-card h3 { color: #fff; font-size: 1.6rem; margin-bottom: 14px; }
.cta-card p { color: rgba(255, 255, 255, 0.75); }
.cta-card .button { border-color: #fff; }
.cta-card .button-primary { background: #fff; color: var(--bottle); }
.cta-card .button-primary:hover { background: transparent; color: #fff; }

/* ─── ARTICLE PAGE ──────────────────────────────── */
.article-header { padding: 84px 0 56px; border-bottom: 1px solid var(--line); }
.back-link { display: inline-flex; align-items: center; gap: 8px; font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 26px; }
.back-link:hover { color: var(--ink); }
.article-title { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.18; margin: 18px 0 0; }
.article-body { padding: 64px 0 88px; }
.article-body h2 { font-size: clamp(1.4rem, 2.2vw, 1.7rem); margin: 52px 0 16px; }
.article-body p { line-height: 1.9; color: var(--ink-soft); margin: 0 0 20px; font-size: 1.08rem; }
.article-body ul { margin: 0 0 20px; padding-left: 0; list-style: none; color: var(--ink-soft); }
.article-body ul li { line-height: 1.85; margin-bottom: 8px; padding-left: 22px; position: relative; }
.article-body ul li::before { content: "—"; position: absolute; left: 0; color: var(--amber); }
.pull-quote {
  font-style: italic;
  font-size: 1.6rem;
  line-height: 1.5;
  color: var(--ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 36px 0;
  margin: 48px 0;
}
.article-cta { margin-top: 56px; }

footer { border-top: 1px solid var(--line); padding: 26px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; }
.footer-copy { color: var(--ink-soft); font-size: 0.72rem; letter-spacing: 0.05em; text-transform: uppercase; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, 1200px); }
  .section { padding: 60px 0; }
  .hero-section { padding: 64px 0 56px; }
  .article-header { padding: 60px 0 40px; }
  .article-body { padding: 44px 0 64px; }
  .cta-card { padding: 32px; }
  .protocol-step { padding: 24px; }
  .figure-row { grid-template-columns: 1fr; }
  .logo-figure { flex-direction: column; text-align: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 8px; }
}