/* Rigid pavement app - on top of culvert/style.css and steel/steel.css */
.st-layout h3.sub { font-size: 13.5px; margin: 12px 0 6px; color: #33414f; }
.field .pair { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.spec-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.spec-card { border: 1px solid var(--line); border-radius: 8px; padding: 8px; background: #fbfcfe; }
.spec-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; font-size: 13px; }
.spec-tbl { width: 100%; border-collapse: collapse; font-size: 12.5px; margin-bottom: 6px; }
.spec-tbl th { font-weight: 600; color: var(--muted); text-align: left; padding: 2px 3px; }
.spec-tbl td { padding: 1px 2px; }
.st-pane .derived { grid-template-columns: minmax(150px, 40%) 1fr; }
.spec-tbl { table-layout: fixed; }
.spec-tbl th:nth-child(1), .spec-tbl th:nth-child(2) { width: 27%; }
.spec-tbl th:nth-child(4) { width: 22px; }
.spec-tbl input { width: 100%; padding: 3px 4px; border: 1px solid #d3dbe4; border-radius: 4px; font: inherit; box-sizing: border-box; }
.spec-tbl .x { border: 0; background: none; color: #a33; cursor: pointer; padding: 0 3px; }
.fig-tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; }
.fig-tabs .tab { padding: 5px 10px; font-size: 12.5px; }
.trials { max-height: 320px; overflow: auto; }
.trials .tbl td, .trials .tbl th { padding: 3px 7px; font-size: 12.5px; }
.trials tr.current td { background: #eef6ff; font-weight: 600; }
.okc { color: #1b7f3b; font-size: 12px; }
.badc { color: #b42318; font-size: 12px; }
@media (max-width: 1500px) { .spec-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 900px) { .spec-grid { grid-template-columns: 1fr; } }