/*! StiffStruct, (c) 2026 Mohammad Asad. All rights reserved. Proprietary: copying, mirroring or reusing this code is not permitted without written permission (see terms.html#intellectual-property). build 20261018-2109 */
/* StiffStruct — model inputs (owned by the "inputs" module): widgets (wg-*), datasheet (ds-*), model panel (mp-*),
 * inspector (in-*) and the section / material managers (mg-*). Tokens only (see app.css); works in both themes.
 *
 *   1. Widgets            4. Inspector
 *   2. Datasheet          5. Section / material managers
 *   3. Model panel        6. Responsive
 */

/* ============================================================================================
   1. Widgets
   ============================================================================================ */

.wg-ic { flex: none; vertical-align: middle; }

/* labelled form row */
.wg-field { grid-template-columns: minmax(78px, 38%) minmax(0, 1fr); align-items: center; column-gap: 8px; row-gap: 3px; }
.wg-field.wg-stacked, .in-grid > .wg-field, .mg-fields .in-grid > .wg-field { grid-template-columns: minmax(0, 1fr); }
.wg-label { font-size: 12px; font-weight: 550; color: var(--fg-muted); line-height: 1.25; min-width: 0; overflow-wrap: anywhere; }
.wg-control { display: flex; align-items: center; gap: 6px; min-width: 0; }
.wg-control > .wg-select, .wg-control > .wg-text, .wg-control > .wg-num, .wg-control > .seg { flex: 0 1 auto; min-width: 0; }
.wg-control > .wg-select, .wg-control > .wg-text, .wg-control > .wg-num { flex: 1 1 auto; }
.wg-unit { color: var(--fg-muted); font-size: 12px; }
.wg-hint { grid-column: 1 / -1; font-size: 11.5px; line-height: 1.35; color: var(--fg-subtle); }

/* number field with an in-box unit */
.wg-num { position: relative; display: inline-flex; align-items: center; min-width: 0; width: 100%; }
.wg-num-input { width: 100%; font-variant-numeric: tabular-nums; }
.wg-num.has-unit .wg-num-input { padding-right: 46px; }
.wg-num-unit {
  position: absolute; right: 9px; top: 50%; transform: translateY(-50%);
  max-width: 44px; overflow: hidden; text-overflow: clip; white-space: nowrap;
  font-size: 11px; color: var(--fg-subtle); pointer-events: none;
}
.wg-num.is-readonly .wg-num-input { background: var(--bg-sunken); color: var(--fg-muted); cursor: default; }
.wg-num.is-invalid .wg-num-input { border-color: var(--danger); box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 18%, transparent); }
.wg-text, .wg-select { width: 100%; }

/* switch */
.wg-toggle { position: relative; display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; font-size: 12.5px; color: var(--fg); }
.wg-toggle-input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; pointer-events: none; }
.wg-toggle-track { position: relative; flex: none; width: 28px; height: 16px; border-radius: 999px; background: var(--border-strong); transition: background-color 0.12s; }
.wg-toggle-thumb { position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; border-radius: 50%; background: #fff; box-shadow: var(--shadow-1); transition: transform 0.12s; }
.wg-toggle-input:checked + .wg-toggle-track { background: var(--accent); }
.wg-toggle-input:checked + .wg-toggle-track .wg-toggle-thumb { transform: translateX(12px); }
.wg-toggle-input:indeterminate + .wg-toggle-track { background: color-mix(in srgb, var(--accent) 45%, var(--border-strong)); }
.wg-toggle-input:focus-visible + .wg-toggle-track { box-shadow: var(--focus-ring); }
.wg-toggle.is-disabled { opacity: 0.5; cursor: not-allowed; }
.wg-toggle-label { line-height: 1.2; }

/* segmented control extras */
.wg-seg-btn .wg-ic { flex: none; }
.wg-seg-sm button { height: 24px; padding: 0 8px; font-size: 12px; }

/* fallback modal & menu (only used when ctx.dialog / ctx.menu are not available) */
.wg-overlay { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; background: rgba(8, 12, 20, 0.45); padding: 12px; }
.wg-modal { display: flex; flex-direction: column; max-height: 90vh; }
.wg-modal-head { display: flex; align-items: center; gap: 8px; padding: 12px 12px 8px 16px; }
.wg-modal-title { flex: 1; margin: 0; font-size: 16px; font-weight: 650; }
.wg-modal-body { padding: 4px 16px 14px; overflow: auto; }
.wg-modal-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 10px 16px; border-top: 1px solid var(--border); }
.wg-confirm-text { margin: 0; line-height: 1.5; }
.wg-menu { position: fixed; z-index: 1001; min-width: 180px; padding: 4px; display: flex; flex-direction: column; box-shadow: var(--shadow-2); }
.wg-menu-item { display: flex; align-items: center; gap: 8px; height: 30px; padding: 0 10px; border: 0; border-radius: var(--radius-sm); background: transparent; color: var(--fg); font: inherit; font-size: 13px; text-align: left; cursor: pointer; }
.wg-menu-item:hover, .wg-menu-item:focus-visible { outline: none; background: var(--bg-hover); }
.wg-menu-item.is-danger { color: var(--danger); }
.wg-menu-sep { height: 1px; margin: 4px 2px; background: var(--border); }

/* ============================================================================================
   2. Datasheet
   ============================================================================================ */

.ds { display: flex; flex-direction: column; min-width: 0; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-elev); }
.ds-scroll { overflow: auto; outline: none; overscroll-behavior: contain; border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
.ds-scroll:focus-visible { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent) 45%, transparent); }
.ds-table { width: max-content; min-width: 100%; font-size: 12.5px; border-collapse: separate; border-spacing: 0; }
.ds-table th, .ds-table td { height: 28px; padding: 0 6px; border-bottom: 1px solid var(--border); border-right: 1px solid var(--border); white-space: nowrap; }
.ds-table th:last-child, .ds-table td:last-child { border-right: 0; }
.ds-table thead th { height: auto; padding: 4px 6px; line-height: 1.15; vertical-align: bottom; }
.ds-th-label { display: block; overflow: hidden; text-overflow: ellipsis; max-width: 120px; }
.ds-th-unit { display: block; font-weight: 400; font-size: 10.5px; color: var(--fg-subtle); }
.ds-table th.num { text-align: right; }
.ds-table .ds-idx {
  position: sticky; left: 0; z-index: 2; width: 34px; min-width: 34px; padding: 0 4px;
  background: var(--bg-sunken); color: var(--fg-muted); text-align: center; font-size: 11.5px; cursor: pointer;
}
.ds-table thead .ds-idx { z-index: 4; cursor: default; }
.ds-table tbody tr:hover .ds-idx { color: var(--fg); }
.ds-table tr.is-selected .ds-idx { background: color-mix(in srgb, var(--accent) 22%, var(--bg-sunken)); color: var(--accent-text); font-weight: 650; }
.ds-cell { position: relative; max-width: 180px; overflow: hidden; text-overflow: ellipsis; cursor: cell; }
.ds-cell.num { text-align: right; font-variant-numeric: tabular-nums; }
.ds-cell.is-active { outline: 2px solid var(--accent); outline-offset: -2px; }
.ds-cell.ds-ro { color: var(--fg-muted); background: color-mix(in srgb, var(--bg-sunken) 55%, transparent); cursor: default; }
.ds-table tr.is-selected .ds-cell.ds-ro { background: transparent; }
.ds-cell.ds-na { background: repeating-linear-gradient(135deg, transparent 0 5px, color-mix(in srgb, var(--border) 60%, transparent) 5px 6px); cursor: default; }
.ds-cell.ds-bool { text-align: center; padding: 0 2px; }
.ds-cell.ds-sel { padding: 0 2px; overflow: visible; }
.ds-cell.is-editing { padding: 0; outline: 2px solid var(--accent); outline-offset: -2px; background: var(--bg-elev); }
.ds-cell.is-editing.is-invalid { outline-color: var(--danger); }
.ds-input { display: block; width: 100%; height: 26px; padding: 0 6px; border: 0; background: transparent; color: var(--fg); font: inherit; text-align: inherit; outline: none; }
.ds-cell.num .ds-input { text-align: right; }
.ds-check { margin: 0; vertical-align: middle; accent-color: var(--accent); cursor: pointer; }
.ds-select { height: 24px; min-width: 44px; width: 100%; padding: 0 20px 0 4px; font-size: 12px; border-color: transparent; background-color: transparent; background-position: calc(100% - 11px) 52%, calc(100% - 6px) 52%; }
.ds-select:hover { border-color: var(--border-strong); }
.ds-select:disabled { opacity: 0.7; }
.ds-empty { padding: 14px 10px; text-align: center; color: var(--fg-muted); white-space: normal; font-size: 12.5px; }
.ds-foot { display: flex; align-items: center; gap: 4px; padding: 4px; border-top: 1px solid var(--border); background: var(--bg-sunken); border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
.ds-count { font-size: 11.5px; white-space: nowrap; padding-right: 4px; }

/* ============================================================================================
   3. Model panel
   ============================================================================================ */

.mp { display: flex; flex-direction: column; min-width: 0; }
.mp-hint { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px 10px; border-bottom: 1px solid var(--border); font-size: 12px; line-height: 1.4; }
.mp-hint strong { font-size: 14px; font-weight: 650; }
.mp-sec { padding: 0; }
.mp-sec-head { display: flex; align-items: center; gap: 4px; padding: 3px 10px 3px 6px; }
.mp-sec-toggle {
  flex: 1 1 auto; display: flex; align-items: center; gap: 8px; min-width: 0; min-height: 34px; padding: 0 8px;
  border: 0; border-radius: var(--radius-sm); background: transparent; color: var(--fg); font: inherit;
  font-size: 11.5px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; text-align: left; cursor: pointer;
}
.mp-sec-toggle:hover { background: var(--bg-hover); }
.mp-sec-toggle:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.mp-chev { display: inline-flex; color: var(--fg-muted); transition: transform 0.12s; }
.mp-sec.is-open .mp-chev { transform: rotate(90deg); }
.mp-sec-icon { display: inline-flex; color: var(--fg-muted); }
.mp-sec-title { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mp-count { margin-left: 2px; text-transform: none; letter-spacing: 0; }
.mp-sec-actions { display: inline-flex; gap: 2px; flex: none; }
.mp-sec-body { display: flex; flex-direction: column; gap: 8px; padding: 0 14px 12px; }
.mp-sec-body[hidden] { display: none; }
.mp-filter { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.mp-filter .wg-select { flex: 1 1 auto; height: 28px; font-size: 12.5px; }
.mp-sheet { min-width: 0; }

/* ============================================================================================
   4. Inspector
   ============================================================================================ */

.insp { display: flex; flex-direction: column; min-width: 0; }
.in-view { display: flex; flex-direction: column; min-width: 0; }
.in-head { position: sticky; top: 0; z-index: 3; display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--border); background: var(--bg-elev); }
.in-head-icon { display: grid; place-items: center; flex: none; width: 32px; height: 32px; border-radius: var(--radius); background: var(--accent-soft); color: var(--accent-text); }
.in-head-text { flex: 1 1 auto; min-width: 0; }
.in-title { font-size: 14px; font-weight: 650; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.in-sub { font-size: 12px; }
.in-del:hover { color: var(--danger); background: var(--danger-soft); }

.in-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 10px; min-width: 0; }
.in-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.in-span { grid-column: 1 / -1; }
.in-stack { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.in-manage { display: flex; align-items: center; gap: 6px; min-width: 0; }
.in-manage > .wg-field { flex: 1 1 auto; min-width: 0; }
.in-list { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.in-none { margin: 0 0 4px; font-size: 12px; color: var(--fg-muted); }
.in-summary { font-size: 12.5px; line-height: 1.4; font-variant-numeric: tabular-nums; }

.in-card { padding: 8px 10px 10px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); min-width: 0; }
.in-card-head { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; font-size: 12.5px; min-width: 0; }
.in-card-head strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.in-card-head .wg-select { width: 116px; height: 26px; font-size: 12px; flex: none; }
.in-card-head > .wg-ic { color: var(--fg-muted); }

.in-sup-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 6px; }
.in-sup-btn, .in-type-btn {
  display: flex; flex-direction: column; align-items: center; gap: 4px; min-width: 0; padding: 8px 4px 6px;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-elev); color: var(--fg-muted);
  font: inherit; font-size: 11px; line-height: 1.15; text-align: center; cursor: pointer;
  transition: background-color 0.12s, border-color 0.12s, color 0.12s;
}
.in-sup-btn:hover, .in-type-btn:hover { background: var(--bg-hover); color: var(--fg); }
.in-sup-btn:focus-visible, .in-type-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.in-sup-btn[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-text); }
.in-sup-btn span, .in-type-btn span { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.in-dofs { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; margin-top: 10px; }
.in-dofs-label { font-size: 12px; }
.in-support > .in-grid { margin-top: 10px; }
.in-support > .wg-field { margin-top: 10px; }

.in-addload { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border); }
.in-addload-title { font-size: 12px; }
.in-types { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; }

.in-rel { display: grid; grid-template-columns: minmax(0, 1fr) 56px 56px; align-items: center; gap: 8px; font-size: 12.5px; }
.in-rel-h { text-align: center; font-size: 11.5px; }
.in-rel .wg-toggle { justify-self: center; }

.in-empty { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 28px 16px 18px; text-align: center; color: var(--fg-muted); font-size: 12.5px; }
.in-empty strong { color: var(--fg); font-size: 14px; }
.in-empty-icon { color: var(--fg-subtle); }
.in-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.in-tile { display: flex; flex-direction: column; align-items: center; gap: 1px; padding: 8px 4px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); font-size: 11.5px; text-align: center; }
.in-tile strong { font-size: 18px; font-variant-numeric: tabular-nums; }
.in-tips { display: flex; flex-direction: column; gap: 6px; margin: 0; padding-left: 18px; font-size: 12.5px; line-height: 1.45; color: var(--fg-muted); }
.in-tips code { font-family: var(--font-mono); font-size: 11.5px; padding: 1px 4px; border-radius: 4px; background: var(--bg-sunken); color: var(--fg); }
.in-actions { display: flex; flex-wrap: wrap; gap: 6px; }

/* ============================================================================================
   5. Section & material managers
   ============================================================================================ */

.btn-danger-text { color: var(--danger); }
.btn-danger-text:hover { background: var(--danger-soft); }
.btn-danger-text:disabled { color: var(--fg-subtle); background: transparent; }

.mg { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 18px; min-height: 440px; padding-top: 6px; }
.mg-side { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.mg-side-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 13px; }
.mg-list { display: flex; flex-direction: column; gap: 4px; max-height: 540px; overflow: auto; padding: 1px; }
.mg-item {
  display: flex; flex-direction: column; gap: 1px; padding: 8px 10px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev); color: var(--fg); font: inherit; text-align: left; cursor: pointer; min-width: 0;
}
.mg-item:hover { background: var(--bg-hover); }
.mg-item:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.mg-item[aria-selected="true"] { border-color: var(--accent); background: var(--accent-soft); }
.mg-item-name { font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mg-item-sub { font-size: 11.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mg-main { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.mg-pane { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.mg-pane[hidden] { display: none; }
.mg-name { display: flex; align-items: center; gap: 10px; }
.mg-name .wg-text { flex: 1 1 auto; font-weight: 600; }
.mg-cols { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 18px; align-items: start; }
.mg-fields:not(.in-grid) { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.mg-error { padding: 6px 10px; border-radius: var(--radius-sm); background: var(--danger-soft); color: var(--danger); font-size: 12px; line-height: 1.4; }
.mg-error[hidden] { display: none; }
.mg-note { margin: 0; font-size: 12px; line-height: 1.45; }
.mg-result { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.mg-preview { display: flex; justify-content: center; padding: 6px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); }
.mg-preview svg { max-width: 100%; height: auto; }
.mg-preview-empty { padding: 22px 16px; text-align: center; font-size: 12.5px; line-height: 1.45; }
.mg-props { font-size: 12.5px; }
.mg-props th { position: static; width: 44px; background: transparent; color: var(--fg); font-weight: 600; }
.mg-props td { color: var(--fg-muted); }
.mg-props td.num { color: var(--fg); }
.mg-cap { padding: 0 0 6px; text-align: left; font-size: 11.5px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--fg-muted); }
.mg-details > summary { cursor: pointer; font-size: 13px; font-weight: 600; padding: 2px 0; }
.mg-steps { display: flex; flex-direction: column; gap: 8px; margin: 8px 0 0; padding-left: 20px; }
.mg-step-label { font-size: 12px; color: var(--fg-muted); }
.mg-math { overflow-x: auto; padding: 2px 0; font-size: 13px; }
.mg-math.is-raw { font-family: var(--font-mono); font-size: 11.5px; white-space: pre-wrap; overflow-wrap: anywhere; }
.mg-actions { display: flex; align-items: center; gap: 8px; margin-top: 2px; padding-top: 12px; border-top: 1px solid var(--border); }
.mg-libbar { display: flex; gap: 8px; }
.mg-libbar .input { flex: 1 1 auto; }
.mg-libbar .wg-select { width: 200px; flex: none; }
.mg-libscroll { max-height: 400px; overflow: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.mg-lib th, .mg-lib td { white-space: nowrap; }
.mg-lib tbody tr:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.mg-lib-act { display: flex; justify-content: flex-end; gap: 4px; }

/* ============================================================================================
   6. Responsive
   ============================================================================================ */

@media (max-width: 820px) {
  .mg { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .mg-cols { grid-template-columns: minmax(0, 1fr); }
  .mg-list { max-height: 150px; }
  .mg-libbar { flex-direction: column; }
  .mg-libbar .wg-select { width: 100%; }
  .mg-actions { flex-wrap: wrap; }
}
@media (max-width: 480px) {
  .in-types { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .in-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
  .mp-chev, .wg-toggle-track, .wg-toggle-thumb { transition: none; }
}