.datasheet-back { margin: 20px 0 32px; }
.material-sheet { color: var(--tecnia-ink); }
.material-hero { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.2fr); gap: 48px; align-items: start; margin-bottom: 64px; }
.material-visual { margin: 0; padding: 0; overflow: hidden; display: flex; flex-direction: column; justify-content: center; background: linear-gradient(135deg, #e9f0f2, #f2efea); border-radius: 12px; }
.material-visual img { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; }
.material-visual figcaption { text-align: center; font-size: 12px; color: var(--tecnia-muted); margin: 14px 16px; }
.sheet-family { color: var(--tecnia-accent-dark); font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; margin: 0 0 14px; }
.material-summary h1 { font-size: clamp(26px, 2.6vw, 38px); line-height: 1.22; font-weight: 700; margin: 0 0 22px; overflow-wrap: anywhere; }
.sheet-description { color: var(--tecnia-muted); font-size: 17px; line-height: 1.75; margin-bottom: 24px; }
.construction-summary { margin: 0; }
.construction-summary > div { display: grid; grid-template-columns: 90px 1fr; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--tecnia-line); font-size: 14px; }
.construction-summary dt { font-weight: 600; }
.construction-summary dd { margin: 0; color: var(--tecnia-muted); }
.material-order { margin-top: 26px; }
.material-price { font-size: 23px; font-weight: 600; margin: 0 0 18px; }
.sheet-order-form { display: flex; align-items: end; gap: 12px; flex-wrap: wrap; }
.sheet-order-form input { width: 100px; }
.order-note { color: var(--tecnia-muted); font-size: 13px; margin: 14px 0 0; }
.specifications-heading { padding-top: 30px; border-top: 1px solid var(--tecnia-line); margin-bottom: 28px; }
.specifications-heading h2 { font-size: 28px; margin: 0; }
.sheet-section { margin-bottom: 32px; }
.sheet-section h2 { font-size: 19px; font-weight: 600; margin: 0 0 14px; color: var(--tecnia-accent-dark); }
.sheet-table-wrap { border: 1px solid var(--tecnia-line); border-radius: 8px; overflow: hidden; }
.sheet-table { border-collapse: collapse; table-layout: fixed; width: 100%; font-size: 13px; text-align: left; }
.sheet-table th, .sheet-table td { border-right: 1px solid var(--tecnia-line); padding: 17px 14px; vertical-align: top; line-height: 1.6; overflow-wrap: anywhere; }
.sheet-table th:last-child, .sheet-table td:last-child { border-right: 0; }
.sheet-table th { background: var(--tecnia-soft); font-weight: 500; color: var(--tecnia-muted); border-bottom: 1px solid var(--tecnia-line); }
.sheet-notes { margin: 30px 0; }
.sheet-notes h2 { font-size: 19px; font-weight: 600; margin-bottom: 12px; }
.sheet-notes p { color: var(--tecnia-muted); line-height: 1.8; }
.sheet-disclaimer { border-top: 1px solid var(--tecnia-line); margin-top: 36px; padding-top: 24px; color: var(--tecnia-muted); font-size: 12px; line-height: 1.8; }
.sheet-disclaimer h2 { font-size: 14px; font-weight: 600; }
@media (max-width: 767px) {
    .material-hero { grid-template-columns: 1fr; gap: 28px; margin-bottom: 36px; }
    .material-visual { padding: 0; }
    .material-visual img { height: auto; }
    .sheet-table thead { display: none; }
    .sheet-table, .sheet-table tbody, .sheet-table tr { display: block; }
    .sheet-table td { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; border: 0; border-bottom: 1px solid var(--tecnia-line); padding: 12px; }
    .sheet-table td:last-child { border-bottom: 0; }
    .sheet-table td::before { content: attr(data-label); color: var(--tecnia-muted); }
}
@media print {
    body > header, body > footer, .datasheet-back, .material-order { display: none !important; }
    .sheet-section { break-inside: avoid; }
}