/* The tool's own chrome. Nothing here touches the sheet: paper-page.css owns
   that, and the calibration screenshots the sheet element alone. */

:root {
  color-scheme: light;
  --ink: #16181d;
  --muted: #5d6470;
  --line: #d9dce3;
  --bg: #f4f5f7;
  --card: #ffffff;
  --accent: #2f5fa8;
  --warn: #8a5a00;
  --error: #a4211c;
  --ok: #1f6b3a;
  --radius: 6px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

.setup { max-width: 1100px; margin: 48px auto 64px; padding: 0 24px; }
.setup-progress { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 32px; }
.setup-step { border: none; background: none; padding: 8px 0; display: flex; gap: 10px; align-items: center; text-align: left; font: inherit; color: var(--muted); cursor: pointer; }
.setup-step:disabled { cursor: default; opacity: .5; }
.step-number { display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid var(--line); border-radius: 50%; flex: 0 0 auto; }
.setup-step[aria-current="step"] { color: var(--accent); font-weight: 600; }
.setup-step[aria-current="step"] .step-number { background: var(--accent); border-color: var(--accent); color: white; }
.setup-card { padding: 36px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 10px 40px #18263706; }
.eyebrow { font-size: 11px; letter-spacing: .13em; font-weight: 650; color: var(--accent); margin: 0 0 10px; }
.setup-card h2 { font-size: 28px; font-weight: 600; letter-spacing: -.025em; margin: 0 0 8px; }
.setup-description { color: var(--muted); margin: 0 0 32px; max-width: 75ch; }
.setup-choices { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.setup-choice { text-align: left; padding: 24px; border: 1px solid var(--line); border-radius: 10px; background: white; color: var(--ink); font: inherit; cursor: pointer; display: flex; flex-direction: column; gap: 10px; }
.setup-choice strong { font-size: 19px; font-weight: 600; }
.setup-choice > span { color: var(--muted); font-size: 12px; }
.setup-choice:hover { border-color: var(--accent); }
.setup-choice[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); background: #f4f8ff; }
.grid-choices { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-choices .setup-choice { padding: 18px; gap: 6px; }
.grid-icon { display: grid; gap: 4px; width: 72px; height: 42px; margin-bottom: 10px; }
.grid-icon i { border: 1px solid #9aacc7; border-radius: 2px; background: #e6edf7; }
.width-choices { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.setup-note { font-size: 12px; color: var(--muted); margin: 20px 0 0; }
.setup-actions { display: flex; justify-content: space-between; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); gap: 12px; }
.primary-button, .secondary-button, #edit-setup { border: 1px solid var(--line); border-radius: 7px; padding: 10px 20px; background: white; color: var(--ink); font: inherit; font-weight: 550; cursor: pointer; }
.primary-button { background: var(--accent); color: white; border-color: var(--accent); margin-left: auto; }
.primary-button:disabled { opacity: .4; cursor: not-allowed; }
.panel-builder { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 28px; }
.figure-palette { display: flex; flex-direction: column; gap: 12px; }
.figure-palette .setup-choice { padding: 18px; cursor: grab; }
.figure-palette .setup-choice strong { font-size: 16px; }
.panel-drop-grid { display: grid; gap: 12px; align-content: start; }
.panel-cell { border: 1px dashed #aab8ce; border-radius: 10px; min-width: 0; background: #f8fafc; padding: 10px; }
.panel-cell.is-filled { border-style: solid; border-color: #abc2e2; background: #f4f8ff; }
.panel-cell.drag-over { outline: 3px solid var(--accent); background: #e5eeff; }
.panel-target { width: 100%; min-height: 110px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; border: none; background: none; font: inherit; color: var(--ink); cursor: pointer; }
.panel-number { font-size: 10px; letter-spacing: .08em; color: var(--muted); }
.panel-symbol { font-size: 30px; color: var(--accent); }
.panel-target strong { font-size: 12px; font-weight: 500; }
.panel-type-select { margin-top: 10px; width: 100%; font: inherit; font-size: 12px; padding: 5px 2px; border: 1px solid var(--line); border-radius: 4px; background: white; }
.setup-error { color: var(--error); }
.setup-error:empty { display: none; }
.editor-heading { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; gap: 16px; background: white; border-bottom: 1px solid var(--line); }
.editor-heading h2 { margin: 3px 0 0; font-size: 18px; font-weight: 550; }
@media (max-width: 700px) {
  .setup { margin-top: 24px; padding: 0 12px; }
  .setup-card { padding: 22px 16px; }
  .setup-card h2 { font-size: 24px; }
  .setup-progress { gap: 6px; }
  .setup-step { flex-direction: column; align-items: flex-start; font-size: 11px; }
  .setup-choices { grid-template-columns: 1fr; }
  .grid-choices { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .panel-builder { grid-template-columns: 1fr; gap: 20px; }
  .figure-palette { flex-direction: row; flex-wrap: wrap; }
  .figure-palette .setup-choice { flex: 1; }
  .panel-drop-grid { gap: 6px; }
  .panel-cell { padding: 4px; }
  .editor-heading h2 { font-size: 14px; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.masthead {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: flex-end;
  justify-content: space-between;
  padding: 16px 20px 12px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.masthead h1 { font-size: 17px; margin: 0 0 4px; }
.masthead .sub { margin: 0; max-width: 62ch; color: var(--muted); }
.runtime { margin: 0; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }

.tabs {
  display: flex;
  gap: 2px;
  padding: 0 20px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.tab {
  appearance: none;
  border: 1px solid transparent;
  border-bottom: none;
  background: transparent;
  padding: 9px 16px;
  font: inherit;
  color: var(--muted);
  cursor: pointer;
  border-radius: var(--radius) var(--radius) 0 0;
}
.tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--bg);
  border-color: var(--line);
  font-weight: 600;
}
.tab:focus-visible, .chip:focus-visible, button:focus-visible,
select:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  padding: 10px 20px;
  border-bottom: 1px solid var(--line);
}
.toolbar-group { display: flex; align-items: center; gap: 8px; }
.toolbar-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.toolbar-zoom { margin-left: auto; }
.toolbar-zoom output { font-variant-numeric: tabular-nums; min-width: 4ch; }
.chips { display: flex; gap: 6px; }
.chip {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 4px 12px;
  font: inherit;
  cursor: pointer;
}
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  gap: 16px;
  padding: 16px 20px 40px;
  align-items: start;
}

.preview { min-width: 0; }
.paper-frame {
  position: relative;
  margin: 0 auto;
  overflow: visible;
}
.paper-scale {
  transform-origin: top left;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, .22));
  transition: opacity .12s linear;
}
.preview.is-stale .paper-scale { opacity: .38; }
.preview.is-rendering .paper-scale { opacity: .38; }

.preview-status {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
  padding: 8px 12px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  border-left-width: 4px;
}
.preview-status[data-kind="working"] { border-left-color: var(--accent); }
.preview-status[data-kind="ok"] { border-left-color: var(--ok); }
.preview-status[data-kind="warn"] { border-left-color: var(--warn); }
.preview-status[data-kind="error"] { border-left-color: var(--error); }
.status-detail { color: var(--muted); font-variant-numeric: tabular-nums; }
.checks {
  list-style: none;
  margin: 12px auto 0;
  padding: 0;
  max-width: 78ch;
  font-size: 12px;
}
.check {
  padding: 5px 10px;
  border-left: 3px solid var(--line);
  background: var(--card);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 3px;
}
.check strong { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.check-warn { border-left-color: var(--warn); }
.check-fail { border-left-color: var(--error); }
.check-open { border-left-color: var(--accent); color: var(--muted); background: transparent; }

.preview-caveat { margin: 14px auto 0; max-width: 70ch; color: var(--muted); font-size: 12px; }

.side { display: flex; flex-direction: column; gap: 14px; position: sticky; top: 12px; max-height: calc(100vh - 24px); overflow: auto; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.card h2 { font-size: 13px; margin: 0 0 8px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.card-head { display: flex; align-items: center; justify-content: space-between; }

.readout { margin: 0; }
.readout-row { display: flex; justify-content: space-between; gap: 12px; padding: 2px 0; }
.readout-row dt { color: var(--muted); }
.readout-row dd { margin: 0; font-variant-numeric: tabular-nums; text-align: right; }

.panel-group { border-top: 1px solid var(--line); padding-top: 10px; margin-top: 10px; }
.panel-group:first-child { border-top: none; margin-top: 0; }
.panel-group h3 { font-size: 12px; margin: 0 0 6px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.panel-note { margin: 0 0 8px; font-size: 12px; color: var(--muted); }

.control { display: grid; grid-template-columns: 1fr; gap: 2px; padding: 3px 0; }
.control-label { font-size: 13px; display: flex; align-items: center; gap: 5px; }
.control-flag { color: var(--accent); font-size: 18px; line-height: 0; }
.control-inputs { display: grid; grid-template-columns: 1fr 78px auto auto; gap: 6px; align-items: center; }
.control-inputs input[type="range"] { width: 100%; }
.control-inputs input[type="number"], .control-inputs select { width: 100%; font: inherit; padding: 2px 4px; }
.control-unit { font-size: 12px; color: var(--muted); min-width: 3ch; }
.control-reset {
  appearance: none; border: 1px solid var(--line); background: var(--card);
  border-radius: var(--radius); font-size: 11px; padding: 2px 6px; cursor: pointer; color: var(--muted);
}
.control.is-overridden .control-label { font-weight: 600; }
.control.is-inapplicable { opacity: .55; }
.control-reason { margin: 1px 0 0; font-size: 11px; color: var(--muted); font-style: italic; }

.buttons { display: flex; flex-wrap: wrap; gap: 6px; }
.buttons button, #reset-all, #reset-paper {
  appearance: none; border: 1px solid var(--line); background: var(--card);
  border-radius: var(--radius); padding: 5px 10px; font: inherit; cursor: pointer;
}
.buttons button:disabled { opacity: .45; cursor: not-allowed; }
#copy-handoff:not(:disabled) { background: var(--accent); border-color: var(--accent); color: #fff; }

.export-state { margin: 0 0 8px; font-size: 12px; color: var(--warn); }
.export-state[data-ready="true"] { color: var(--ok); }
.copy-fallback { margin-top: 10px; }
.copy-fallback textarea { width: 100%; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
.copy-fallback-reason { margin: 0 0 4px; font-size: 12px; color: var(--warn); }

.footnote { padding: 0 20px 28px; color: var(--muted); font-size: 12px; }
.footnote p { max-width: 90ch; margin: 0; }

@media (max-width: 1080px) {
  /* The panel moves below the sheet; the sheet itself is scaled, never reflowed —
     its line breaks are the template's and must not depend on the window. */
  .layout { grid-template-columns: minmax(0, 1fr); }
  .side { position: static; max-height: none; }
}

#paper-body, #paper-caption { width: 100%; box-sizing: border-box; font: inherit; margin: 8px 0; }
#figure-height-slider { width: 65%; }