/* Shared reference note for material chemistry charts and tables. */
.chem-reference-note {
  margin: 0 0 32px;
  padding: 20px 24px;
  border: 1px solid #d9e2ec;
  border-left: 3px solid #1957a6;
  background: #fff;
  color: #46505d;
  font-size: 14px;
  line-height: 1.7;
}
.chem-reference-note strong {
  display: block;
  margin-bottom: 6px;
  color: #11161d;
  font-weight: 600;
}
.chem-reference-note p { margin: 0; max-width: 100ch; }
@media (max-width: 600px) {
  .chem-reference-note { padding: 17px 18px; font-size: 13px; }
}

/* Material family reference section; native details remain usable without JS. */
#material-composition { scroll-margin-top: 150px; }
#material-composition .chem-heading { margin-bottom: 22px; }
#material-composition .chem-eyebrow { color: var(--accent-ink); font: 11px/1.5 var(--xeon-font-mono, monospace); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 10px; }
#material-composition h2 { font-size: clamp(25px, 3vw, 36px); margin-bottom: 14px; }
#material-composition .chem-intro { max-width: 780px; color: var(--text-2); font-size: 15px; line-height: 1.7; }
#material-composition .chem-reference-note { margin-bottom: 24px; border-radius: 6px; background: #f7f9ff; }
#material-composition .chem-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 24px; align-items: start; }
#material-composition .chem-elements { min-width: 0; }
#material-composition .chem-list-head { display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: baseline; justify-content: space-between; }
#material-composition h3 { color: var(--text); font-size: 18px; margin: 0; }
#material-composition .chem-list-head > span { font-size: 12px; color: var(--text-2); }
#material-composition .chem-basis { margin: 10px 0 18px; font-size: 13px; line-height: 1.7; color: var(--text-2); }
#material-composition .chem-element { background: var(--panel); border: 1px solid var(--line); border-radius: 7px; margin-bottom: 8px; overflow: hidden; }
#material-composition .chem-element[open] { border-color: #b9c4ef; }
#material-composition summary { display: grid; grid-template-columns: 46px minmax(0, 1fr) minmax(70px, auto) 16px; gap: 12px; align-items: center; padding: 14px 16px; cursor: pointer; list-style: none; }
#material-composition summary::-webkit-details-marker { display: none; }
#material-composition summary:hover { background: var(--panel-2); }
#material-composition summary:focus-visible, #material-composition a:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; }
#material-composition .chem-symbol { width: 46px; height: 46px; display: flex; align-items: center; justify-content: center; border: 1px solid #cfd5eb; border-radius: 4px; background: var(--accent-soft); color: var(--accent-ink); font: 16px/1 var(--xeon-font-mono, monospace); }
#material-composition .chem-name { font-size: 14px; font-weight: 600; }
#material-composition .chem-amount { font-size: 12px; font-variant-numeric: tabular-nums; line-height: 1.5; max-width: 210px; text-align: right; color: var(--text-2); }
#material-composition .chem-toggle::before { content: '+'; font-size: 20px; color: var(--accent-ink); }
#material-composition details[open] .chem-toggle::before { content: '−'; }
#material-composition .chem-element > p { margin: 0; padding: 0 22px 20px 74px; color: var(--text-2); font-size: 14px; line-height: 1.7; }
#material-composition .chem-key { margin: 14px 0 0; color: var(--text-2); font-size: 12px; line-height: 1.7; }
#material-composition .chem-science { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 26px; }
#material-composition .chem-science dl { margin: 24px 0 0; }
#material-composition dt { margin: 22px 0 7px; font-size: 12px; font-weight: 600; color: var(--text); }
#material-composition dt:first-child { margin-top: 0; }
#material-composition dd { margin: 0; font-size: 14px; line-height: 1.75; color: var(--text-2); }
#material-composition .chem-sources { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
#material-composition .chem-sources > p { color: var(--text-2); font-size: 12px; line-height: 1.7; margin-top: 8px; }
#material-composition .chem-sources ul { padding: 0; margin: 18px 0 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 32px; }
#material-composition .chem-sources a { display: inline-block; color: var(--link); text-decoration: underline; text-underline-offset: 3px; font-size: 13px; line-height: 1.6; overflow-wrap: anywhere; }
#material-composition .chem-sources li > span { display: block; margin-top: 4px; color: var(--text-2); font-size: 12px; line-height: 1.7; }
@media (max-width: 800px) {
  #material-composition .chem-layout { grid-template-columns: minmax(0, 1fr); }
  #material-composition .chem-sources ul { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 480px) {
  #material-composition summary { grid-template-columns: 42px minmax(0, 1fr) 16px; gap: 4px 12px; padding: 14px; }
  #material-composition .chem-symbol { width: 42px; height: 42px; grid-row: 1 / 3; }
  #material-composition .chem-amount { grid-column: 2; max-width: none; text-align: left; }
  #material-composition .chem-toggle { grid-column: 3; grid-row: 1 / 3; }
  #material-composition .chem-element > p { padding: 0 18px 18px; }
  #material-composition .chem-science { padding: 22px; }
}
@media print {
  #material-composition .chem-layout { display: block; }
  #material-composition .chem-element { break-inside: avoid; }
  #material-composition .chem-science { margin-top: 20px; }
}