/* === Guide/material page styles ===
   Pages: /safety, /storage, /pregnancy, /phototoxicity, /certifications,
          /essential-oil-intro, /vegetable-oils, /waxes-candles, /clays-exfoliants, /hydrosols
   Pairs with: site.css */

.guide-page .container {
  max-width: 680px;
}

/* === Hero — full-width centered like /oils === */
.guide-page header.hero {
  /* Break out of .container's max-width to span viewport */
  width: 100vw;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  padding: 96px 24px 48px;
  text-align: center;
  box-sizing: border-box;
}
.guide-page header.hero h1 {
  font-size: clamp(48px, 7vw, 96px);
  font-weight: 400;
  margin: 0 0 18px;
  letter-spacing: 0.005em;
  line-height: 1.04;
}
.guide-page header.hero .en-mark {
  display: block;
  font-family: 'Geist', system-ui, sans-serif;
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  opacity: 0.78;
  margin-bottom: 0;
}
@media (max-width: 540px) {
  .guide-page header.hero {
    /* Match /oils mobile hero size — bigger h1, same alignment/padding */
    width: auto;
    position: static;
    left: auto;
    transform: none;
    text-align: left;
    padding: 56px 0 28px;
    box-sizing: content-box;
  }
  .guide-page header.hero h1 {
    font-size: clamp(48px, 12vw, 64px);
    line-height: 1.05;
    margin: 0 0 12px;
  }
  .guide-page header.hero .en-mark {
    font-size: 11px;
    letter-spacing: 0.32em;
  }
}

/* Dividers tràn ngang full-width — break out of container */
.guide-page .container > hr.divider {
  width: 100vw;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  border: none;
  border-top: 1px solid #d8d0c4;
}

/* === Intro block === */
.guide-page .intro {
  padding: 24px 0;
}
.guide-page .intro .lang-vn p {
  font-size: 18px;
  line-height: 1.65;
  margin: 0 0 12px;
  opacity: 0.95;
}
.guide-page .intro .lang-en p {
  font-family: 'Geist', system-ui, sans-serif;
  font-style: italic;
  opacity: 0.78;
  font-size: 14px;
  line-height: 1.55;
  margin: 0 0 10px;
}

/* === Table of contents === */
html { scroll-behavior: smooth; }
.guide-page .toc {
  margin: 8px 0 28px;
  padding: 24px 0;
  border-top: 1px solid #1f1812;
  border-bottom: 1px solid #e5dcce;
}
.guide-page .toc h3 {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.78;
  margin: 0 0 18px;
  font-weight: 500;
}
.guide-page .toc h3 .en { opacity: 0.78; margin-left: 6px; }
.guide-page .toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0 28px;
}
.guide-page .toc ol li {
  counter-increment: toc;
  border-top: 1px solid #e5dcce;
}
.guide-page .toc ol li:first-child { border-top: none; }
.guide-page .toc a {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: baseline;
  text-decoration: none;
  padding: 12px 0;
  transition: transform 0.22s ease-out;
}
.guide-page .toc a:hover { transform: translateX(4px); }
.guide-page .toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  opacity: 0.5;
  letter-spacing: 0.06em;
}
.guide-page .toc .toc-title {
  font-size: 15px;
  line-height: 1.35;
}
.guide-page .toc .toc-title .en {
  display: block;
  font-style: italic;
  font-size: 12.5px;
  opacity: 0.7;
  margin-top: 2px;
}
.guide-page .toc .toc-arrow {
  font-size: 11px;
  opacity: 0.5;
  letter-spacing: 0.14em;
}

/* Mini "back to top" link */
.guide-page .to-top {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.55;
  text-decoration: none;
  margin: 12px 0 0;
  padding: 4px 0;
  transition: opacity 0.18s, transform 0.22s;
}
.guide-page .to-top:hover { opacity: 1; transform: translateY(-2px); }

/* === Sections === */
.guide-page section {
  padding: 22px 0;
  scroll-margin-top: 24px;
}
.guide-page section h2 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 500;
  margin: 0 0 22px;
  letter-spacing: 0;
  line-height: 1.25;
}
.guide-page section h2 .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  opacity: 0.5;
  letter-spacing: 0.08em;
  margin-right: 14px;
  vertical-align: 0.2em;
}
.guide-page section h2 .sep { opacity: 0.5; margin: 0 6px; }
.guide-page section h2 .en {
  font-style: italic;
  font-weight: 400;
  opacity: 0.78;
}
.guide-page section h3 {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 24px 0 12px;
  opacity: 0.85;
}
.guide-page section .lang-vn p {
  font-size: 16.5px;
  line-height: 1.7;
  margin: 0 0 14px;
  opacity: 0.95;
}
.guide-page section .lang-en p {
  font-family: 'Geist', system-ui, sans-serif;
  font-style: italic;
  opacity: 0.78;
  font-size: 13.5px;
  line-height: 1.6;
  margin: 0 0 10px;
}
.guide-page .lang-en {
  margin-top: 6px;
}

/* === Tables (e.g., phototoxic oils, IFRA limits, certification organizations) === */
.guide-page table.data {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  margin: 8px 0 16px;
}
.guide-page table.data caption {
  text-align: left;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.85;
  padding: 0 0 14px;
}
.guide-page table.data caption .en { opacity: 0.85; margin-left: 4px; }
.guide-page table.data thead th {
  text-align: left;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.78;
  padding: 0 14px 12px 0;
  border-bottom: 1px solid #1f1812;
}
.guide-page table.data thead th:last-child { padding-right: 0; text-align: right; }
.guide-page table.data tbody td {
  padding: 11px 14px 11px 0;
  border-top: 1px solid #e5dcce;
  vertical-align: baseline;
  font-size: 15px;
}
.guide-page table.data tbody td:last-child { padding-right: 0; text-align: right; }
.guide-page table.data tbody td.numeric {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
  letter-spacing: 0.02em;
}
.guide-page table.data tbody tr:last-child td { border-bottom: 1px solid #e5dcce; }
.guide-page table.data .item-name { font-style: italic; }
.guide-page table.data .item-name a {
  text-decoration: none;
  transition: transform 0.22s ease-out;
  display: inline-block;
}
.guide-page table.data .item-name a:hover { transform: scale(1.05); }

/* === Cross-link list === */
.guide-page .related {
  padding: 18px 0;
}
.guide-page .related h3 {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.78;
  margin: 0 0 14px;
}
.guide-page .related ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px 20px;
}
.guide-page .related li {
  border-top: 1px solid #e5dcce;
  padding: 10px 0;
}
.guide-page .related a {
  text-decoration: none;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  transition: transform 0.22s ease-out;
}
.guide-page .related a:hover { transform: scale(1.03); }
.guide-page .related .name { font-style: italic; font-size: 15px; }
.guide-page .related .arrow {
  font-size: 11px;
  letter-spacing: 0.14em;
  opacity: 0.7;
}

/* === Note callout block === */
.guide-page .note {
  background: rgba(31, 24, 18, 0.04);
  padding: 20px 24px;
  border-left: 2px solid #1f1812;
  margin: 16px 0;
}
.guide-page .note strong {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 8px;
  opacity: 0.7;
}
.guide-page .note .lang-en { padding-top: 10px; }

/* === Bottom nav === */
.guide-page nav.bottom {
  padding: 56px 32px 24px;
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.9;
}
.guide-page nav.bottom a {
  text-decoration: none;
  display: inline-block;
  transition: transform 0.22s ease-out;
  margin: 0 16px;
}
.guide-page nav.bottom a:hover { transform: scale(1.05); }

@media (max-width: 540px) {
  .guide-page header.hero { padding: 48px 0 24px; }
  .guide-page table.data thead th { font-size: 10px; }
  .guide-page table.data tbody td { font-size: 14px; }
  .guide-page .related ul { grid-template-columns: 1fr; }
}


/* Phase C diagram styles */
.diagram-hero { padding: 24px 0; }
.diagram-svg { display: block; width: 100%; max-width: 760px; margin: 16px auto; height: auto; }
.diag-caption { text-align: center; color: #888; font-style: italic; font-size: 13px; margin-top: 12px; }