:root {
  /* shadcn-style dark — zinc base */
  --bg:        #000000;   /* page background */
  --bg-panel:  rgba(9,9,11,0.88);   /* panel / card surface */
  --bg-inset:  rgba(15,15,17,0.91); /* inputs, inset rows */
  --bg-raised: rgba(20,20,22,0.94); /* hover, pill, raised elements */

  /* borders */
  --border:       #27272a;  /* panel edges */
  --border-inner: #1f1f22;  /* row separators */

  /* semantic aliases */
  --bg2:   var(--bg-panel);
  --bg3:   var(--bg-inset);
  --bg4:   var(--bg-raised);
  --panel: var(--bg-panel);
  --border2: #3f3f46;

  /* text — zinc scale */
  --text:  #fafafa;
  --text2: #a1a1aa;
  --text3: #52525b;

  /* input sizing */
  --input-py-text: 0.375rem;
  --input-py-num:  0.25rem;
  --input-px:      0.4375rem;
  --input-w-sm:    3.5rem;
  --input-w-md:    4.5rem;

  /* nav height is kept exact by syncTopNavHeight() */
  --top-nav-height: 4.2rem;
  --main-window-width: 740px;

  /* accent + semantic */
  --accent:    #dfd114;
  --accent-fg: #111111;
  --positive:  #4ade80;
  --facility:  #7c9eb5;
  --locked:    #c49a6c;
  --danger:    #f87171;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
.kpi-val, .sg-cell, .prod-rate-display, .prod-max-label, .usage-val, .fac-num-input, .res-input {
  font-family: ui-monospace, 'Cascadia Code', 'Fira Mono', monospace;
  font-variant-numeric: tabular-nums;
}
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
input[type=number] { -moz-appearance: textfield; font-family: ui-monospace, 'Cascadia Code', 'Fira Mono', monospace; font-variant-numeric: tabular-nums; }

html { font-size: 18px; }

body {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.5;
  min-height: 100vh;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background: url('assets/background.png') center / cover;
  filter: blur(3px);
  transform: scale(1.03);
}

.app {
  width: 100%;
  box-sizing: border-box;
}

/* GLASS PANELS — shared backdrop blur for all surface elements */
header.top-nav,
.result-table-wrap,
.usage-wrap {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
/* Side-pane panels are inside a scroll container (overflow-y: auto).
   backdrop-filter on elements inside a scroller forces per-scroll repaint and
   lazy GPU layer promotion on first scroll-into-view, causing a visible stutter.
   The panel background is already rgba(9,9,11,0.88) so the blur is imperceptible anyway. */
.side-pane > .panel {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

/* TOP NAV (sticky full-width header) */
header.top-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(0,0,0,0.70);
  padding: 1rem 1.5rem 0.875rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* SIDE NAV TOGGLE */
.side-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  background: transparent;
  border: none;
  color: var(--text2);
  cursor: pointer;
  padding: 0;
  transition: color 0.12s;
}
.side-toggle:hover {
  color: var(--text);
}
.side-toggle i { width: 1rem; height: 1rem; pointer-events: none; }
.side-toggle svg { width: 1rem; height: 1rem; }

/* MOBILE OVERLAY BACKDROP */
.side-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 40;
}

.logo-hex {
  width: 2.25rem;
  height: 2.25rem;
  flex-shrink: 0;
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0;
}

.header-text h1 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0;
  text-transform: none;
}

.header-text p {
  font-size: 0.6875rem;
  color: var(--text3);
  letter-spacing: 0;
}

.tabs {
  display: flex;
  gap: 0.125rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  padding: 0.1875rem;
  margin-left: auto;
}

.tab {
  padding: 0.3125rem 0.875rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  border: none;
  background: transparent;
  color: var(--text2);
  border-radius: 0.25rem;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

.tab.active {
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
}

.tab:hover:not(.active) {
  background: var(--bg4);
  color: var(--text);
}

/* LAYOUT — fixed independent side pane plus centered document content */
.page-layout {
  display: block;
  min-height: calc(100vh - 5rem);
  padding: 0 1rem;
}

.side-pane {
  position: fixed;
  top: var(--top-nav-height);
  bottom: 0;
  left: 1rem;
  padding-top: 1rem;
  padding-right: 0.375rem;
  width: 22rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 5;
  transition: transform 0.25s ease;
  overflow-y: auto;
  max-height: none;
  padding-bottom: 1.25rem;
  overscroll-behavior: contain;
}
/* prevent flex from squashing panels — side-pane scrolls instead */
.side-pane > * { flex-shrink: 0; }

/* DESKTOP — user hid the side pane via the toggle */
.app.side-collapsed .side-pane { display: none; }
.app.side-collapsed #page-main .body-area { margin-left: 0; }

/* main body area: flex-1 sibling of side-pane that centers content and shrinks without overlapping */
.body-area {
  padding-top: 1rem;
  padding-bottom: 10.25rem;
  flex: 1 1 0%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: safe center;
  gap: 0.75rem;
}
#page-main .body-area { margin-left: 23rem; }
/* let wraps shrink below their content's min-content so the inner scrollable
   container (.sum-grid-scroll) handles the overflow with its own thin scrollbar */
.body-area > * { min-width: 0; }

/* low-profile horizontal scroll for the production summary grid when the grid
   can't shrink any further. Used on both main tab (#summary-body) and saved cards. */
.sum-grid-scroll {
  overflow-x: auto;
}

/* ─── Thin rectangular scrollbars for all inner scroll containers ─── */
.sum-grid-scroll,
.mat-search-dropdown {
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}
.sum-grid-scroll::-webkit-scrollbar,
.mat-search-dropdown::-webkit-scrollbar { width: 4px; height: 4px; }
.sum-grid-scroll::-webkit-scrollbar-track,
.mat-search-dropdown::-webkit-scrollbar-track { background: transparent; }
.sum-grid-scroll::-webkit-scrollbar-thumb,
.mat-search-dropdown::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 0; }
.sum-grid-scroll::-webkit-scrollbar-thumb:hover,
.mat-search-dropdown::-webkit-scrollbar-thumb:hover { background: var(--text3); }
.sum-grid-scroll::-webkit-scrollbar-button,
.mat-search-dropdown::-webkit-scrollbar-button { display: none; }

/* Side pane scrollbar — hidden until hover */
.side-pane {
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
}
.side-pane:hover { scrollbar-color: var(--border2) transparent; }
.side-pane::-webkit-scrollbar { width: 4px; }
.side-pane::-webkit-scrollbar-track { background: transparent; }
.side-pane::-webkit-scrollbar-button { display: none; }
.side-pane::-webkit-scrollbar-thumb { background: transparent; border-radius: 0; transition: background 0.15s; }
.side-pane:hover::-webkit-scrollbar-thumb { background: var(--border2); }
.side-pane:hover::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* standalone variant for tabs without a side pane */
.body-area.standalone {
  width: 100%;
  flex: none;
  min-height: calc(100vh - 5rem);
  padding: 0 1.5rem 5rem;
}
.body-area.materials-area {
  align-items: stretch;
  max-width: 72rem;
  margin: 0 auto;
}

/* legacy aliases — kept for any stale references */
.main-grid { display: contents; }
.left-col  { display: flex; flex-direction: column; gap: 0.75rem; }
.right-col { display: flex; flex-direction: column; gap: 0.75rem; }
.body-center { display: flex; flex-direction: column; gap: 0.75rem; align-items: center; }

/* PANELS */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  overflow: hidden;
}

.panel-head {
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}

.panel-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  letter-spacing: 0;
  text-transform: none;
}

.panel-title.purple { color: var(--text); }

.collapse-btn {
  width: 1.25rem;
  height: 1.25rem;
  border: 1px solid var(--border2);
  border-radius: 0.1875rem;
  background: transparent;
  color: var(--text3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  transition: border-color 0.12s, color 0.12s;
  flex-shrink: 0;
  padding: 0;
  line-height: 1;
}

.collapse-btn:hover { border-color: var(--border2); color: var(--text2); }
.collapse-btn .chevron { display: inline-block; transition: transform 0.25s cubic-bezier(.4,0,.2,1); }
.panel.collapsed .chevron { transform: rotate(-90deg); }

.panel-body {
  padding: 0.5625rem 0.625rem;
  overflow: hidden;
  max-height: 2000px;
  transition: max-height 0.3s cubic-bezier(.4,0,.2,1), padding 0.3s cubic-bezier(.4,0,.2,1), opacity 0.25s ease;
  opacity: 1;
}

.panel.collapsed .panel-body {
  max-height: 0 !important;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}

.panel.collapsed .panel-head { border-bottom-color: transparent; }
.result-table-wrap > .panel-head { cursor: default; user-select: auto; }


.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.0625rem 0.4375rem;
  border-radius: 0.625rem;
  font-size: 0.625rem;
  background: var(--bg4);
  border: 1px solid var(--border2);
  color: var(--text2);
  font-variant-numeric: tabular-nums;
}
.pill.purple { color: var(--text2); }

.empty-state {
  text-align: center;
  padding: 1.5rem 1.25rem;
  color: var(--text3);
  font-size: 0.75rem;
}

/* ITEM ROWS */
.item-row {
  display: grid;
  align-items: center;
  gap: 0.3125rem;
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--border-inner);
}
.item-row:last-child { border-bottom: none; }

.item-name {
  font-size: 0.75rem;
  color: var(--text);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.item-name.fac-item { color: var(--facility); }

/* PRODUCTION CARD GRID */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(6.25rem, 1fr));
  gap: 0.375rem;
  padding: 0.125rem 0;
}

.prod-card {
  position: relative;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.625rem 0.5rem 0.5rem;
  gap: 0.25rem;
  transition: border-color 0.12s;
}
.prod-card:hover { border-color: var(--border2); }
.prod-card-locked { border-color: rgba(160,132,92,.35); }

.prod-card-actions {
  position: absolute;
  top: 0.25rem; right: 0.25rem;
  display: flex;
  gap: 0.125rem;
  opacity: 0;
  transition: opacity 0.12s;
}
.prod-card:hover .prod-card-actions { opacity: 1; }

.prod-card-icon { display: block; margin-bottom: 0.125rem; }

.prod-card-name {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text);
  text-align: center;
  line-height: 1.3;
  word-break: break-word;
}
.prod-card-name.fac-item { color: var(--facility); }

.prod-rate {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding: 0.25rem 0.375rem;
  text-align: center;
  outline: none;
  margin-top: 0.125rem;
}
.prod-rate:focus { border-color: var(--accent); }
.prod-rate.locked {
  color: var(--locked);
  border-color: rgba(160,132,92,.3);
  background: rgba(160,132,92,.06);
  cursor: default;
}

.prod-card-sub {
  font-size: 0.625rem;
  color: var(--text3);
}

/* INPUTS */
.num-input {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  padding: 0.1875rem 0.375rem;
  text-align: center;
  outline: none;
  transition: border-color 0.12s;
  width: 4rem;
}
.num-input:focus { border-color: var(--accent); }

.locked-display {
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--locked);
  text-align: right;
  min-width: 4rem;
  padding: 0.1875rem 0.375rem;
}

/* PRODUCTION SLIDER ROW */
.prod-item-row {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  gap: 0.5rem;
  padding: 0.375rem 0;
  border-bottom: 1px solid var(--border-inner);
}
.drag-handle {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  color: var(--text3);
  cursor: grab;
  margin-right: -0.5rem;
  opacity: 0;
  transition: opacity 0.15s;
}
.prod-item-row:hover .drag-handle { opacity: 1; }
.drag-handle:active { cursor: grabbing; }
.prod-ghost { opacity: 0.35; background: var(--bg4); border-radius: 6px; }
.prod-chosen { opacity: 1 !important; background: var(--bg4); border-radius: 6px; }
.prod-item-row:last-child { border-bottom: none; }
.prod-item-row:first-child { padding-top: 0; }
.prod-item-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
}
.prod-item-icon .mat-icon { width: 2rem; height: 2rem; object-fit: contain; border-radius: 3px; }
.prod-item-right {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2rem;
}
.prod-item-top {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.prod-item-top .item-name { font-size: 0.75rem; flex: 1; min-width: 0; }
.prod-item-bottom {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.prod-item-actions {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
}

.prod-price {
  font-size: 0.6875rem;
  color: var(--text3);
  white-space: nowrap;
}

.prod-slider-wrap { display: contents; }

.prod-slider {
  flex: 1;
  min-width: 0;
  height: 8px;
  accent-color: var(--accent);
  cursor: pointer;
}

.prod-rate-display {
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  width: var(--input-w-md);
  text-align: right;
  background: transparent;
  border: 1px solid #27272a;
  border-radius: 0.25rem;
  padding: var(--input-py-num) var(--input-px);
  outline: none;
}
.prod-rate-display:focus { border-color: var(--accent); }

.prod-max-label {
  font-size: 0.75rem;
  color: var(--text3);
  white-space: nowrap;
}


.prod-options-row {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding-bottom: 0.375rem;
  margin-bottom: 0.25rem;
  border-bottom: 1px solid var(--border-inner);
}
.prod-options-combined {
  justify-content: flex-end;
  gap: 0.75rem;
}
.prod-option-control {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-width: 0;
}
.prod-option-label {
  font-size: 0.625rem;
  color: var(--text2);
  white-space: nowrap;
}
.add-row {
  display: flex;
  gap: 0.3125rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}
.add-row input[type=text] {
  flex: 1;
  min-width: 5rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: var(--input-py-text) var(--input-px);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.75rem;
  outline: none;
}
.add-row input[type=text]:focus { border-color: var(--accent); }

.add-row input[type=number] {
  width: var(--input-w-md);
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  padding: var(--input-py-num) var(--input-px);
  text-align: center;
  outline: none;
}
.add-row input[type=number]:focus { border-color: var(--accent); }

.inline-sel {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.75rem;
  padding: 0.25rem 0.375rem;
  outline: none;
}
.inline-sel:focus { border-color: var(--accent); }

/* BUTTONS */
.btn {
  padding: 0.3125rem 0.6875rem;
  border: 1px solid var(--border2);
  border-radius: 0.25rem;
  background: var(--bg4);
  color: var(--text2);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  white-space: nowrap;
}
.btn:hover {
  background: var(--bg3);
  border-color: var(--accent);
  color: var(--text);
}

.btn.purple { color: var(--facility); border-color: var(--facility); }
.btn.purple:hover { background: var(--bg3); }

.btn.solve-btn {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0;
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
  white-space: nowrap;
}
.btn.solve-btn:hover { opacity: 0.88; }

.icon-btn {
  width: 1.375rem;
  height: 1.375rem;
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  background: transparent;
  color: var(--text3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
  flex-shrink: 0;
}
.icon-btn:hover { border-color: var(--border2); color: var(--text2); background: var(--bg4); }
.icon-btn.lock-on { border-color: var(--accent); color: var(--accent); background: rgba(160,128,48,.1); }
.icon-btn.pin-temp { border-color: #3a8a7a; color: #3a8a7a; background: rgba(58,138,122,.1); }
.icon-btn.del:hover { border-color: var(--danger); color: var(--danger); }
.icon-btn.infeasible { border-color: var(--danger); color: var(--danger); background: rgba(248,113,113,.1); }
.prod-slider.infeasible { accent-color: var(--danger); }
.snap-card .panel-head .icon-btn:hover { background: rgba(0,0,0,0.15); border-color: rgba(0,0,0,0.3); color: var(--accent-fg); }

/* KPIs */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.5rem; }
@media (max-width: 700px) { .kpi-grid { grid-template-columns: repeat(2, 1fr); } }

.kpi {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  padding: 0.625rem 0.75rem;
  position: relative;
  overflow: hidden;
}
.kpi::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--border);
}
.kpi.green::before  { background: var(--positive); }
.kpi.orange::before { background: var(--accent); }
.kpi.gold::before   { background: var(--text2); }

.kpi-label {
  font-size: 0.625rem;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 0.1875rem;
}
.kpi-val {
  font-size: 1.0625rem;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  font-weight: 600;
}
.kpi.green .kpi-val  { color: var(--positive); }
.kpi.orange .kpi-val { color: var(--accent); }

/* TABLES (legacy — for any remaining tables) */
.result-table-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  overflow: hidden;
}
.summary-wrap {
  width: 100%;
  max-width: var(--main-window-width);
}
.usage-results-wrap {
  width: 100%;
  max-width: var(--main-window-width);
  min-width: 0;
}
.usage-results-wrap > .panel-body { min-width: 0; }

.usage-results-head { cursor: default; }
.open-calc-actions {
  min-width: 0;
  flex: 0 1 auto;
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.375rem;
}
.open-calc-btn {
  min-width: 0;
  flex: 0 1 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.3125rem 0.5rem;
  border: 1px solid var(--border2);
  border-radius: 0.25rem;
  background: var(--bg-panel);
  color: var(--text2);
  font: inherit;
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s, color 0.12s;
}
.open-calc-btn:hover {
  border-color: var(--accent);
  background: var(--bg);
  color: var(--text);
}
.open-calc-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.open-calc-btn svg {
  width: 0.75rem;
  height: 0.75rem;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 420px) {
  .open-calc-btn span { display: none; }
  .open-calc-btn {
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
  }
}

/* SUMMARY FIXED COLUMN METRICS (kept in sync with renderSummaryTable JS) */
:root {
  --sum-col-product: 200px;
  --sum-col-permin:  220px;
  --sum-col-raw:      70px;
  --sum-col-price:   120px;
  --sum-col-bill:    140px;
}

table { width: 100%; border-collapse: collapse; font-size: 0.75rem; }

th {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0.375rem 0.625rem;
  text-align: left;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text2);
}
th:last-child, td:last-child { text-align: right; }

td {
  padding: 0.3125rem 0.625rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }

.td-name { font-variant-numeric: normal; font-size: 0.75rem; display: flex; align-items: center; gap: 0.375rem; }
.td-pos, .sg-cell.td-pos   { color: var(--positive); }
.td-neg, .sg-cell.td-neg   { color: var(--danger); }

/* SUMMARY GRID (replaces table for Production Summary) */
.sum-grid {
  display: grid;
  align-items: center;
  /* at least fill the scroll container; can grow wider so overflow-x kicks in */
  min-width: 100%;
}
.sg-cell {
  padding: 0.375rem 0.625rem;
  font-size: 0.75rem;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-inner);
  align-self: stretch;
  display: flex;
  align-items: center;
  /* allow the cell to shrink inside its grid track and clip its own content
     so adjacent cells never overlap */
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sg-cell > * { min-width: 0; }
.sg-cell.sg-head {
  background: var(--bg-raised);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text2);
  border-bottom: 1px solid var(--border);
}
.sg-cell.sg-last, .sg-cell.sg-total.sg-last { border-bottom: none; }
.sg-cell:not(.sg-head):not(.sg-save-row) { background: transparent; }
.sg-cell.sg-total { border-bottom: 1px solid var(--border-inner); background: transparent; }
.sg-right { justify-content: flex-end; text-align: right; }
.sg-center { justify-content: center; text-align: center; }

/* INLINE STATUS ICONS */
.per-min-wrap { display: inline-flex; align-items: center; gap: 0.25rem; }
.per-min-used { font-size: 0.625rem; color: var(--text3); }
.status-icon { width: 0.875rem; height: 0.875rem; flex-shrink: 0; }
.status-icon svg { width: 0.875rem !important; height: 0.875rem !important; display: block; stroke: currentColor; fill: none; stroke-width: 2; }

/* OUTPOST BILL CELL */
.sg-outpost-cell {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem;
  overflow: hidden;
}
.outpost-input {
  min-width: 0;
  width: 6rem;
  color: inherit;
  background: transparent;
  border: 1px solid #27272a;
  text-align: right;
}

/* SAVE BUTTON ROW */
.sg-save-row {
  padding: 0.5rem 0.625rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}
.btn-save-snapshot, .btn-load-snapshot {
  background: var(--accent);
  color: var(--accent-fg);
  border: none;
  border-radius: 0.375rem;
  padding: 0.3rem 0.875rem;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.01em;
}
.btn-save-snapshot:hover, .btn-load-snapshot:hover { filter: brightness(1.15); }

/* SAVED PRODUCTIONS TAB — flex-wrap: cards sit side-by-side until they'd shrink
   below min-width, then wrap to the next row */
.saved-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 0;
  align-items: flex-start;
  justify-content: center;
  width: 100%;
  margin: 0 auto;
}
.snap-card {
  flex: 0 1 740px;
  min-width: 500px;
}

.badge {
  display: inline-block;
  padding: 0.0625rem 0.375rem;
  border-radius: 0.1875rem;
  font-size: 0.625rem;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  font-weight: 600;
}
.badge-locked { background: rgba(160,132,92,.12); color: var(--locked);   border: 1px solid rgba(160,132,92,.25); }
.badge-opt    { background: rgba(90,158,114,.1);  color: var(--positive); border: 1px solid rgba(90,158,114,.2); }
.badge-fac    { background: rgba(122,158,192,.1); color: var(--facility); border: 1px solid rgba(122,158,192,.2); font-size: 0.5625rem; }

/* RESOURCE BARS */
.usage-kpis {
  display: grid;
  grid-template-columns: repeat(4, minmax(7rem, 1fr));
  gap: 0.45rem;
  margin-bottom: 0.65rem;
}
.usage-kpi {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg3);
}
.usage-kpi span { color: var(--text3); font-size: 0.625rem; text-transform: uppercase; font-weight: 600; }
.usage-kpi strong { color: var(--text1); font-size: 0.875rem; font-variant-numeric: tabular-nums; }
.usage-section-title {
  margin-top: 0.6rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
  color: var(--text2);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.facility-section-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.usage-header-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-left: auto;
  color: var(--text2);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  white-space: nowrap;
}
.usage-resource-group,
.facility-usage-section {
  min-width: 0;
  margin-top: 0.65rem;
  padding: 0 0.55rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: color-mix(in srgb, var(--bg3) 58%, transparent);
}
.usage-resource-group .usage-section-title,
.facility-usage-section .usage-section-title {
  margin-top: 0;
  padding-top: 0.45rem;
}
.raw-resource-group { border-color: color-mix(in srgb, #60a5fa 30%, var(--border)); }
.meta-resource-group {
  border-color: rgba(167,139,250,.32);
  background: rgba(167,139,250,.035);
}
.intermediate-resource-scroll {
  max-height: min(20rem, 42vh);
  min-width: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}
.intermediate-resource-scroll::-webkit-scrollbar { width: 4px; height: 4px; }
.intermediate-resource-scroll::-webkit-scrollbar-track { background: transparent; }
.intermediate-resource-scroll::-webkit-scrollbar-thumb { background: var(--border2); }
.meta-transfer-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid rgba(167,139,250,.35);
  border-radius: 6px;
  background: rgba(167,139,250,.08);
  color: var(--text2);
  font-size: 0.6875rem;
}
.meta-transfer-row strong { color: var(--text1); }
.meta-transfer-label { color: #a78bfa; font-weight: 700; margin-right: 0.15rem; }
.res-bar-grid {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.25rem 0.5rem;
  padding: 0.25rem 0;
}
.res-bar-row { display: contents; }

.res-bar-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text1);
  min-width: 6.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.res-bar-label.fac { color: var(--text2); }
.res-bar-label em {
  display: inline-block;
  margin-left: 0.25rem;
  padding: 0.02rem 0.2rem;
  border-radius: 3px;
  background: rgba(96,165,250,.12);
  color: #60a5fa;
  font-size: 0.5rem;
  font-style: normal;
  text-transform: uppercase;
}
.res-bar-label em.meta { background: rgba(167,139,250,.13); color: #a78bfa; }

.res-bar-track {
  flex: 1;
  height: 8px;
  background: var(--bg3);
  border-radius: 4px;
  overflow: hidden;
}
.res-bar-fill { height: 100%; border-radius: 3px; transition: width 0.4s ease; }

.res-flow-track {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 2px;
  height: 12px;
  min-width: 6rem;
}
.res-flow-half { display: flex; overflow: hidden; border-radius: 2px; background: var(--bg3); }
.res-flow-half > span { display: block; height: 100%; transition: width 0.18s linear; }
.res-flow-local { background: #60a5fa; }
.res-flow-import { background: #a78bfa; }
.res-flow-consumed { background: #f97316; }

.bar-ok   { background: var(--positive); }
.bar-warn { background: var(--accent); }
.bar-over { background: var(--danger); }
.bar-fac  { background: var(--positive); }

.res-bar-nums {
  font-size: 0.6875rem;
  font-variant-numeric: tabular-nums;
  color: var(--text2);
  min-width: 5rem;
  text-align: right;
}

.fac-seg-track { display: flex; overflow: hidden; border-radius: 4px; background: var(--bg-raised); height: 8px; width: 100%; }
.fac-seg { height: 100%; transition: width 0.4s ease; }
.fac-seg-empty { height: 100%; }
.fac-seg-legend-row { display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0.125rem 0 0.375rem 0; margin-left: calc(7rem + 0.5rem); }
.fac-seg-legend { display: flex; align-items: center; gap: 0.25rem; font-size: 0.625rem; color: var(--text2); }
.fac-seg-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }

/* Per-bin rows: one row per co-location group (recipes sharing one building),
   shown as the output-item icons grouped together, color-coded + sized by rate. */
.fac-bins { display: flex; flex-direction: column; gap: 0.25rem; }
.fac-bin-row { display: flex; align-items: center; gap: 0.4rem; }
.fac-bin-count { font-size: 0.6875rem; font-weight: 600; font-variant-numeric: tabular-nums; color: var(--text1); flex-shrink: 0; min-width: 1.7rem; text-align: right; }
.fac-bin-track { display: flex; overflow: hidden; border-radius: 4px; height: 18px; flex: 1; gap: 1px; }
.fac-bin-seg { height: 100%; display: flex; align-items: center; justify-content: center; min-width: 0; background: var(--bg-raised); border-bottom: 2px solid; }
.fac-bin-seg img { height: 13px; width: 13px; object-fit: contain; flex-shrink: 0; }

/* FACILITY GRID */
.fac-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: 0.5rem;
  min-width: 0;
}
.fac-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.625rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}
.fac-card-header {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  min-width: 0;
}
.fac-card-name {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}
.fac-card-count {
  font-size: 0.6875rem;
  font-variant-numeric: tabular-nums;
  color: var(--text2);
  white-space: nowrap;
  flex-shrink: 0;
}
.fac-card-count.td-neg { color: var(--danger); }
.fac-card-over { border-color: color-mix(in srgb, var(--danger) 55%, var(--border)); }
.fac-card-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  color: var(--text3);
  font-size: 0.5625rem;
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}
.fac-card-legend {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

/* FACILITY SEGMENT TOOLTIP */
#fac-tooltip {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  background: #111113;
  border: 1px solid var(--border2);
  border-radius: 5px;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
  color: var(--text);
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.5);
  display: none;
}

@media (max-width: 700px) {
  .usage-kpis { grid-template-columns: repeat(2, minmax(7rem, 1fr)); }
  .resource-flow-grid { grid-template-columns: minmax(7rem, 1fr) minmax(5rem, 1.2fr) auto; }
  .res-bar-nums { min-width: 0; }
}

/* SOLVER LOG */
#solver-log {
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  background: #111113;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.625rem;
  color: var(--text3);
  padding: 0.375rem 0.5rem;
  overflow-y: visible;
  line-height: 1.7;
}
#solver-log:empty { display: none; }

.log-ok   { color: var(--positive); }
.log-warn { color: var(--locked); }
.log-err  { color: var(--danger); }

/* SOLVER SETTINGS */
.solver-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
  padding: 0.5rem 0.625rem;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 0.3125rem;
}
.solver-bar label {
  font-size: 0.6875rem;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.solver-bar select,
.solver-bar input[type=number] {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.6875rem;
  padding: var(--input-py-num) var(--input-px);
  text-align: center;
  outline: none;
}

.fac-card-head { display: flex; align-items: center; gap: 0.375rem; margin-bottom: 0.25rem; }

.fac-name-input {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: none;
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 500;
  outline: none;
  padding: 0.125rem 0;
}
.fac-name-input::placeholder { color: var(--text3); }

.fac-num-input {
  width: var(--input-w-md);
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  padding: var(--input-py-num) var(--input-px);
  text-align: center;
  outline: none;
}
.fac-num-input:focus { border-color: var(--border2); }

/* FACILITY ASSIGNED PRODUCTS */
.fac-assigned-list { display: flex; flex-direction: column; margin-bottom: 0.25rem; }
.fac-prod-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto auto auto;
  align-items: center;
  gap: 0.3125rem;
  border-top: 1px solid var(--border-inner);
  padding: 0.25rem 0;
}
.fac-prod-name { font-size: 0.75rem; color: var(--facility); font-weight: 500; }
.fac-prod-meta { font-size: 0.625rem; color: var(--text3); }

/* PAGE SYSTEM */
.page { display: none; }
.page.active { display: block; }

/* ADD-FAC-PRODUCT ROW */
.add-fac-prod-row { display: flex; gap: 0.3125rem; align-items: center; flex-wrap: wrap; margin-top: 0.25rem; }

/* POWER BATTERY ROWS */
.power-bat-row {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3125rem 0;
  border-bottom: 1px solid var(--border-inner);
  flex-wrap: wrap;
}
.power-bat-row:last-child { border-bottom: none; }
.power-bat-row:first-child { padding-top: 0; }

/* MATERIAL ICONS */
.mat-icon { vertical-align: middle; border-radius: 2px; width: 1.4rem; height: 1.4rem; flex-shrink: 0; }

/* legacy - keep for compat */
.mat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 0.3125rem;
  padding: 0.5rem 0.625rem;
  margin-bottom: 0.375rem;
}
.mat-card-head { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.mat-cost-row {
  display: flex; align-items: center; gap: 0.375rem;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 0.25rem; padding: 0.25rem 0.5rem; font-size: 0.6875rem;
}
.mat-add-row {
  display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap;
}

/* MATERIALS GROUP LABEL */
.mat-group-label {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--text2);
  padding: 1rem 0 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}
.mat-group-label:first-child { padding-top: 0; }

/* MATERIALS GRID */
.mat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16.25rem, 1fr));
  gap: 0.75rem;
  align-items: start;
  margin-bottom: 1rem;
}

/* NEW COMPACT MATERIAL CARDS */
.mat-card2 {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.mc-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.625rem;
  background: var(--bg-raised);
}

.mc-body {
  border-top: 1px solid var(--border-inner);
  background: var(--bg-panel);
  padding: 0.625rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mc-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mc-controls-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.mc-controls-right {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-left: auto;
}
.mc-controls-right .mc-field-label {
  width: 3.5rem;
  text-align: left;
}
.mc-controls-right.mc-controls-right-inline {
  flex-direction: column;
}

.mc-del {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text3);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0 0.125rem;
  line-height: 1;
  transition: color 0.12s;
}
.mc-del:hover { color: var(--danger); }

.mc-name {
  flex: 1;
  font-size: 0.75rem;
  font-weight: 600;
  min-width: 3.75rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mc-field {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.mc-field-label {
  font-size: 0.625rem;
  color: var(--text3);
  white-space: nowrap;
}

.mc-num {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  padding: var(--input-py-num) var(--input-px);
  text-align: center;
  outline: none;
  width: var(--input-w-md);
}
.mc-num:focus { border-color: var(--accent); }

/* TOGGLE SWITCH */
.tog-wrap {
  display: flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  gap: 0;
}
.tog-wrap.tog-disabled { opacity: 0.35; pointer-events: none; }
.tog-cb { display: none; }
.tog-track {
  width: 1.75rem;
  height: 1rem;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  position: relative;
  transition: background 0.15s, border-color 0.15s;
  flex-shrink: 0;
}
.tog-track::after {
  content: '';
  position: absolute;
  top: 0.125rem; left: 0.125rem;
  width: 0.625rem; height: 0.625rem;
  border-radius: 50%;
  background: var(--text3);
  transition: left 0.15s, background 0.15s;
}
.tog-cb:checked + .tog-track {
  background: var(--accent);
  border-color: var(--accent);
}
.tog-cb:checked + .tog-track::after {
  left: 0.875rem;
  background: var(--accent-fg);
}

/* COST SECTION */
.mc-costs-list {
  display: flex;
  flex-direction: column;
  gap: 0.1875rem;
}
.mc-cost-row {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.125rem 0;
  font-size: 0.75rem;
}
.mc-cost-add {
  display: flex;
  align-items: center;
  gap: 0.3125rem;
}

/* RAW MATERIALS ICON GRID */
.mc-raw-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}
.mc-raw-cell {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.25rem;
}
.mc-raw-cell img { display: block; }
.mc-raw-qty {
  width: var(--input-w-sm);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.6875rem;
  font-variant-numeric: tabular-nums;
  padding: var(--input-py-num) var(--input-px);
  text-align: center;
  outline: none;
}
.mc-raw-qty:focus { border-color: var(--accent); }

.badge-raw {
  background: rgba(90,158,114,.1);
  color: var(--positive);
  border: 1px solid rgba(90,158,114,.2);
  font-size: 0.5625rem;
  padding: 0.0625rem 0.25rem;
  border-radius: 0.1875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

/* MATERIALS PAGE HEADER (outside panels) */
.mat-page-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0 1rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

#price-config-list.result-table-wrap { padding: 0.25rem 0.625rem; }

#mat-config-list {
  /* sits directly on --bg, already dark */
}

/* MATERIAL SEARCH */
.mat-search-wrap { position: relative; min-width: 13.75rem; max-width: 20rem; }

.mat-search-input {
  width: 100%;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--text);
  font-size: 0.75rem;
  padding: var(--input-py-text) var(--input-px);
  outline: none;
}
.mat-search-input:focus { border-color: var(--accent); }

.mat-search-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 3px);
  left: 0; right: 0;
  background: #111113;
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  max-height: 17.5rem;
  overflow-y: auto;
  z-index: 200;
  box-shadow: 0 8px 24px rgba(0,0,0,.6);
}
.mat-search-dropdown.open { display: block; }

.mat-search-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4375rem 0.625rem;
  cursor: pointer;
  font-size: 0.75rem;
  border-bottom: 1px solid var(--border-inner);
}
.mat-search-item:last-child { border-bottom: none; }
.mat-search-item:hover { background: rgba(255,255,255,.04); }

.mat-search-empty {
  padding: 0.75rem;
  font-size: 0.6875rem;
  color: var(--text3);
  text-align: center;
}

/* =========================================================
   RESPONSIVE LAYOUT — side-pane becomes an off-canvas
   overlay below 1100px so it exits the flex flow first,
   guaranteeing the body-area is never squeezed.
   ========================================================= */
@media (max-width: 1100px) {
  html { font-size: 16px; }

  /* pull side-pane out of the flex flow as a fixed overlay, hidden off-canvas */
  .side-pane {
    position: fixed;
    top: var(--top-nav-height);
    left: 0;
    width: min(22rem, 88vw);
    max-width: 88vw;
    height: auto;
    z-index: 50;
    background: var(--bg-panel);
    border-right: 1px solid var(--border);
    padding: 0.75rem;
    overflow-y: auto;
    transform: translateX(-100%);
    box-shadow: 4px 0 16px rgba(0, 0, 0, 0.4);
    /* reset desktop flex sizing */
    flex: none;
    max-height: none;
  }
  /* the desktop "collapsed" class must not double-hide an already off-canvas pane */
  .app.side-collapsed .side-pane { display: flex; }
  /* toggle slides the pane in */
  .app.side-mobile-open .side-pane { transform: translateX(0); }
  .app.side-mobile-open .side-backdrop { display: block; }

  /* body-area fills full width — side-pane is no longer in the flow */
  .page-layout { display: block; }
  .body-area { width: 100%; min-width: 0; }
  #page-main .body-area { margin-left: 0; }

  /* materials/saved tabs */
  .body-area.materials-area { max-width: 100%; padding: 0; }
}

/* =========================================================
   MOBILE (≤768px) — phone-specific adjustments on top of
   the overlay layout applied at 1100px above.
   ========================================================= */
@media (max-width: 768px) {
  html { font-size: 15px; }

  header.top-nav {
    padding: 0.625rem 0.75rem 0.5rem;
    gap: 0.5rem;
  }
  .page-layout { padding: 0 0.75rem; }
  .body-area.standalone { padding: 0 0.75rem 2.5rem; }
  .header-text h1 { font-size: 0.875rem; }
  .header-text { display: none; }
  .tabs { margin-left: auto; padding: 0.125rem; gap: 0; }
  .tab { padding: 0.25rem 0.5rem; font-size: 0.6875rem; }

  /* tighter dimensions for the shorter mobile header */
  .side-pane {
    top: 3.5rem;
    height: calc(100vh - 3.5rem);
    width: min(20rem, 88vw);
  }

  /* panels less crowded on narrow screens */
  .panel-body { padding: 0.5rem; }

  /* tighter summary grid on phones */
  .sg-cell { font-size: 0.6875rem; padding: 0.25rem 0.4375rem; }
  .sg-cell.sg-head { font-size: 0.5625rem; }
}

/* ultra-narrow phones — drop a few more affordances */
@media (max-width: 420px) {
  html { font-size: 14px; }
  .tab { padding: 0.25rem 0.4375rem; font-size: 0.75rem; }
  .mat-search-wrap { min-width: 0; max-width: 100%; flex: 1 1 100%; }
}

/* ─── FOOTER ─── */
.app-footer {
  padding: 0.25rem 1.5rem;
  line-height: 1;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}
.footer-github { margin-left: auto; }
.footer-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: var(--text2);
}
.footer-item svg { width: 0.8rem; height: 0.8rem; }
.footer-link {
  text-decoration: none;
  transition: color 0.12s;
}
.footer-link:hover { color: var(--text); }
.footer-sep { font-size: 0.75rem; color: var(--text3); }