/* 42CrMo4 chisel steel page: article, grade table, schematic, FAQ. */
.steel { max-width: 820px; padding-block: var(--space-6, 24px) var(--space-12, 48px); }
.steel h1 { margin: 0 0 var(--space-4, 16px); }
.steel h2 { margin: var(--space-10, 40px) 0 var(--space-3, 12px); }
.steel h2::after { content: ""; display: block; width: 40px; height: 2px; margin-top: 8px; background: var(--color-accent); }
.steel p, .steel li { max-width: 70ch; }
.steel-answer { font-size: 18px; line-height: 28px; padding: var(--space-4, 16px); background: var(--color-mist, #F2F5F4); border-left: 3px solid var(--color-accent); }
.steel-draft { margin-bottom: var(--space-5, 20px); }
.steel-fine { font-size: 14px; color: var(--color-slate, #536763); }
.steel-verify { display: inline-block; padding: 0 6px; font-size: 12px; font-weight: 700; color: var(--color-ink, #233B39); background: var(--color-accent-tint, #FBF5E1); border-radius: var(--radius-sm, 4px); }

.steel-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.steel-table th, .steel-table td { padding: 10px 8px; border-bottom: 1px solid var(--color-line, #D5DEDC); text-align: left; vertical-align: top; }
.steel-table thead th { background: var(--color-mist, #F2F5F4); font-weight: 700; }
.steel-table tbody th { color: var(--color-primary, #0F5E57); font-weight: 700; }
.steel-table tbody tr:first-child { background: var(--color-primary-tint, #E7F0EE); }
@media (max-width: 767px) {
  .steel-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .steel-table tr { display: block; padding: 10px 8px; border-bottom: 1px solid var(--color-line, #D5DEDC); }
  .steel-table th, .steel-table td { display: block; border: 0; padding: 2px 0; }
  .steel-table td::before { content: attr(data-label) ": "; font-weight: 700; color: var(--color-slate, #536763); }
}

.steel-fig { margin: var(--space-5, 20px) 0; padding: var(--space-4, 16px); border: 1px solid var(--color-line, #D5DEDC); border-radius: var(--radius-sm, 4px); color: var(--color-ink, #233B39); }
.steel-fig__svg { display: block; width: 100%; max-width: 520px; height: auto; }
.steel-fig figcaption { margin-top: 8px; font-size: 13px; color: var(--color-slate, #536763); }

.faq { border-top: 1px solid var(--color-line, #D5DEDC); }
.faq__item { border-bottom: 1px solid var(--color-line, #D5DEDC); }
.faq__item summary { display: flex; align-items: center; min-height: 48px; padding: 8px 0; font-weight: 700; color: var(--color-primary, #0F5E57); cursor: pointer; }
.faq__item p { margin: 0 0 var(--space-4, 16px); }

.steel-actions { display: grid; gap: var(--space-2, 8px); margin-top: var(--space-8, 32px); }
@media (min-width: 640px) { .steel-actions { grid-auto-flow: column; justify-content: start; } }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.panel { padding: var(--space-4, 16px); border-radius: var(--radius-sm, 4px); }
.panel--note { border-left: 3px solid var(--color-accent); background: var(--color-accent-tint, #FBF5E1); }