/* Workspace layout and side panel rails. */

/* ---------- Workspace ---------- */
.workspace {
  --left-w: 264px;
  --right-w: 304px;
  --rail-w: 44px;
  display: grid;
  grid-template-columns: var(--left-w) minmax(0, 1fr) var(--right-w);
  grid-template-areas: "left canvas right";
  height: calc(100dvh - 76px);
  min-height: 0;
  align-items: stretch;
}

.controls {
  grid-area: left;
  display: grid;
  align-content: start;
  gap: 0;
  min-height: 0;
  overflow-y: auto;
  /* Scrolling past either end stays in the panel instead of dragging the
     whole page on iOS. */
  overscroll-behavior: contain;
  padding: 0;
  background: var(--surface-1);
  border-right: 1px solid var(--border);
  box-shadow: inset -1px 0 rgb(255 255 255 / 2%);
}

@media (min-width: 901px) {
  .workspace.left-folded {
    --left-w: var(--rail-w);
  }
  .workspace.right-folded {
    --right-w: var(--rail-w);
  }
}

.controls-right {
  grid-area: right;
  border-right: 0;
  border-left: 1px solid var(--border);
  box-shadow: inset 1px 0 rgb(255 255 255 / 2%);
}
.panel-note {
  margin: 0;
  color: var(--text-faint);
  font-size: var(--fs-xs);
  line-height: 1.4;
}
/* ---------- Side panel rails ---------- */
.rail-head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 44px;
  padding: 0 8px 0 var(--rail-pad);
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
}
.rail-title {
  flex: 1 1 auto;
  margin: 0;
  color: var(--text-dim);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 16px;
  text-transform: uppercase;
}
.rail-action {
  min-height: var(--control-h-sm);
  padding-inline: 8px;
  font-size: var(--fs-sm);
}
.rail-fold {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  width: var(--control-h-sm);
  height: var(--control-h-sm);
  padding: 0;
  border: 0;
  border-radius: var(--r-sm);
  color: var(--text-dim);
  background: transparent;
  cursor: pointer;
}
.rail-fold:hover {
  color: var(--text);
  background: var(--surface-hover);
}
.rail-fold:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}
.rail-body {
  display: grid;
  align-content: start;
  min-width: 0;
}
@media (min-width: 901px) {
  /* A folded panel keeps only its fold button, with the title running down
     the rail so it still says what is there. */
  .workspace.left-folded .controls-left,
  .workspace.right-folded .controls-right {
    overflow: hidden;
  }
  .workspace.left-folded .controls-left .rail-head,
  .workspace.right-folded .controls-right .rail-head {
    flex-direction: column;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 0;
  }
  .workspace.left-folded .controls-left .rail-fold,
  .workspace.right-folded .controls-right .rail-fold {
    order: -1;
    transform: scaleX(-1);
  }
  .workspace.left-folded .controls-left .rail-title,
  .workspace.right-folded .controls-right .rail-title {
    writing-mode: vertical-rl;
    flex: none;
  }
  .workspace.left-folded .controls-left .rail-body,
  .workspace.right-folded .controls-right .rail-body,
  .workspace.right-folded .controls-right .rail-action {
    display: none;
  }
}

/* The profile list is a listbox: every profile shows at once, like a
   presets panel, and My profiles join it as an option group. */
#export-profile {
  height: auto;
  max-height: 340px;
  padding: 4px;
  overflow-y: auto;
  border-radius: var(--r-sm);
  background: var(--surface-2);
}
#export-profile option,
#export-profile optgroup {
  padding: 6px 8px;
  border-radius: var(--r-xs);
  color: var(--text);
}
#export-profile optgroup {
  color: var(--text-faint);
  font-size: var(--fs-xs);
  font-weight: 600;
}
#export-profile option:checked {
  color: var(--text);
  background: var(--accent-soft) linear-gradient(var(--accent-soft), var(--accent-soft));
}
#save-preset {
  justify-self: start;
}
#stencil-threshold-slot:not([hidden]) {
  display: grid;
  padding: 0 var(--rail-pad) 14px;
  border-bottom: 1px solid var(--border);
}

/* Columns never grow past the panel: an auto column takes its widest
   child's text width (a select at 16px touch size), and on iOS that
   overflow lets the whole panel drag sideways. */
.field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

.field label,
.field legend {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: var(--fs-md);
  font-weight: 500;
  padding: 0;
}
.label-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

/* Values stay quiet: orange is reserved for the primary action, the
   current selection and focus. */
.field output {
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
}

.choice {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400 !important;
  justify-content: flex-start !important;
  min-height: 24px;
}

.button-row {
  display: flex;
  gap: 6px;
  align-items: center;
}
.icon-button {
  min-height: var(--control-h);
  min-width: var(--control-h);
  padding: 0;
}
/* Quiet icon actions that sit beside a primary control. */
.button-ghost {
  background: transparent;
  color: var(--text-dim);
}
.button-ghost:hover {
  background: var(--surface-hover);
  color: var(--text);
}
/* View toggle and the rotate and invert actions share one row. */
.sheet-tabs {
  display: none;
}