/* UMLOne styling. System fonts only — no downloads, so nothing here may reference a
   remote font or image. Diagram colours live here too, referenced by class name from
   render.js, so appearance stays out of the drawing code. */

:root {
  --bg: #f4f5f7;
  --panel-bg: #ffffff;
  --border: #c9ccd1;
  --border-strong: #8b9099;
  --text: #1b1d21;
  --text-dim: #62676f;
  --accent: #2b6cb0;
  --accent-soft: #d8e6f5;
  --canvas-bg: #ffffff;
  --grid: #e8eaed;
  --selected: #2b6cb0;
  --ui-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
             Arial, sans-serif;
  --diagram-font: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  font-family: var(--ui-font);
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

/* --- toolbar -------------------------------------------------------------- */

#toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px 10px;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  flex: none;
}

#toolbar .brand {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

#toolbar .brand-name {
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
}

#toolbar .brand-by {
  font-size: 11px;
  color: var(--text-dim);
  text-decoration: none;
}

#toolbar .brand-by:hover,
#toolbar .brand-by:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

#toolbar .group {
  display: flex;
  align-items: center;
  gap: 4px;
}

#toolbar .group.grow { flex: 1; }

#toolbar label {
  color: var(--text-dim);
  margin-right: 2px;
}

button {
  font: inherit;
  color: var(--text);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 9px;
  cursor: pointer;
}

button:hover:not(:disabled) { background: var(--accent-soft); }
button:disabled { opacity: 0.4; cursor: default; }

select, input[type="text"], input[type="number"], textarea {
  font: inherit;
  color: var(--text);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 5px;
}

/* A readout, not a control — the way back to 100% is the 1:1 button beside it. Tabular
   figures so the toolbar does not shuffle as the number changes width. */
#zoom-level {
  min-width: 44px;
  text-align: center;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.status { color: var(--text-dim); }
.status.dirty { color: #a8500b; font-weight: 600; }
.status.error { color: #b3261e; font-weight: 600; }

/* --- layout --------------------------------------------------------------- */

#workspace {
  flex: 1;
  display: flex;
  min-height: 0;
}

#palette {
  width: 150px;
  flex: none;
  padding: 8px;
  background: var(--panel-bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
}

#palette h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 10px 0 5px;
}

#palette h2:first-child { margin-top: 0; }

#palette .tool {
  display: block;
  width: 100%;
  text-align: left;
  margin-bottom: 3px;
}

#palette .tool.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

#palette .hint {
  margin-top: 12px;
  color: var(--text-dim);
  line-height: 1.45;
}

#canvas-host {
  flex: 1;
  position: relative;
  min-width: 0;
  background: var(--canvas-bg);
}

#canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: default;
  /* Stop the browser from turning a drag into a text selection or a pan gesture. */
  touch-action: none;
  user-select: none;
}

#canvas.tool-node { cursor: copy; }
#canvas.tool-edge { cursor: crosshair; }
#canvas.panning { cursor: grabbing; }

#drop-overlay {
  position: absolute;
  inset: 12px;
  display: none;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--accent);
  border-radius: 8px;
  background: rgba(43, 108, 176, 0.06);
  color: var(--accent);
  font-size: 15px;
  pointer-events: none;
}

#canvas-host.drop-active #drop-overlay { display: flex; }

#inspector {
  width: 280px;
  flex: none;
  padding: 10px;
  background: var(--panel-bg);
  border-left: 1px solid var(--border);
  overflow-y: auto;
}

#inspector h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 0 0 10px;
}

/* --- inspector forms ------------------------------------------------------ */

.field {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.field > label {
  width: 84px;
  flex: none;
  color: var(--text-dim);
}

.field > input[type="text"],
.field > select,
.field > textarea {
  flex: 1;
  min-width: 0;
}

.field.check > label { width: auto; }

.subhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 14px 0 6px;
  font-weight: 600;
}

.member-list { margin: 0; padding: 0; list-style: none; }

.member {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px;
  margin-bottom: 6px;
  background: #fbfbfc;
}

.member .row {
  display: flex;
  gap: 4px;
  margin-bottom: 4px;
}

.member .row:last-child { margin-bottom: 0; }
.member input[type="text"] { min-width: 0; flex: 1; }
.member select { flex: none; }

.member .params {
  margin-top: 4px;
  padding-left: 8px;
  border-left: 2px solid var(--border);
}

.tiny {
  padding: 2px 6px;
  font-size: 12px;
  line-height: 1.2;
}

.danger { color: #b3261e; }

.empty {
  color: var(--text-dim);
  font-style: italic;
}

.readonly-id {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  word-break: break-all;
}

/* --- diagram (SVG) -------------------------------------------------------- */

/* Keyed to the class rather than to #canvas, because the SVG export draws the same
   diagram into a detached element and reads its appearance back with getComputedStyle.
   A rule the export cannot match is a rule the exported file loses. */
.uml-diagram text {
  font-family: var(--diagram-font);
  fill: var(--text);
  /* Text is decoration for hit-testing purposes; the shape underneath takes the click. */
  pointer-events: none;
}

.node-shape {
  fill: #ffffff;
  stroke: var(--border-strong);
  stroke-width: 1;
}

.node.selected .node-shape {
  stroke: var(--selected);
  stroke-width: 2;
}

.node-compartment-line { stroke: var(--border-strong); stroke-width: 1; }

.node-name { font-weight: 600; text-anchor: middle; }
.node-name.abstract { font-style: italic; }
.node-stereotype { text-anchor: middle; fill: var(--text-dim); }
.node-member { text-anchor: start; }
.node-member.static { text-decoration: underline; }
.node-member.abstract { font-style: italic; }

.package-tab { fill: #ffffff; stroke: var(--border-strong); stroke-width: 1; }
.package-body { fill: rgba(255, 255, 255, 0.35); }
.comment-shape { fill: #fffdf0; stroke: #c9b878; }
.comment-fold { fill: #efe8c8; stroke: #c9b878; }

.edge-line {
  fill: none;
  stroke: var(--text);
  stroke-width: 1.25;
}

.edge.selected .edge-line { stroke: var(--selected); stroke-width: 2.5; }
.edge-dashed { stroke-dasharray: 6 4; }

/* Transparent fat stroke sitting under each edge so thin lines are still clickable. */
.edge-hit {
  fill: none;
  stroke: transparent;
  stroke-width: 12;
  cursor: pointer;
}

.edge-decoration { stroke: var(--text); stroke-width: 1.25; }
.edge-decoration.hollow { fill: #ffffff; }
.edge-decoration.filled { fill: var(--text); }
.edge-decoration.open { fill: none; }
.edge.selected .edge-decoration { stroke: var(--selected); }
.edge.selected .edge-decoration.filled { fill: var(--selected); }

.edge-label { text-anchor: middle; font-size: 11px; }

.handle {
  fill: #ffffff;
  stroke: var(--selected);
  stroke-width: 1.5;
}

.handle.nw, .handle.se { cursor: nwse-resize; }
.handle.ne, .handle.sw { cursor: nesw-resize; }
.handle.n, .handle.s { cursor: ns-resize; }
.handle.e, .handle.w { cursor: ew-resize; }
.handle.waypoint { cursor: move; }

.marquee {
  fill: rgba(43, 108, 176, 0.10);
  stroke: var(--selected);
  stroke-dasharray: 4 3;
  stroke-width: 1;
}

.pending-edge {
  fill: none;
  stroke: var(--selected);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
  pointer-events: none;
}

.edge-source-hint .node-shape { stroke: var(--selected); stroke-width: 2; }

/* --- in-place text editing ------------------------------------------------ */

/* One transparent row per editable line, sitting above the text. Glyph-only hit-testing
   would leave the gap after a short attribute name unclickable, which is not how a line
   of text is expected to behave.

   No cursor of its own, deliberately. An I-beam here would promise that clicking starts
   typing, when a single click selects the box and begins a drag — typing needs a
   double-click. Leaving it unset also lets the canvas cursor through, so the palette
   tools keep their crosshair and copy cursors over a box's text rather than being
   overridden by it. The text cursor appears where it is true: inside the field itself,
   once one is open. */
.line-hit {
  fill: transparent;
  pointer-events: all;
}

/* The gaps above and below a compartment's members, where a double-click adds one.
   They are only a few pixels tall, so they tint on hover — without that there is nothing
   to tell you the gap is a target at all. */
.line-hit.insert {
  cursor: cell;
}

.line-hit.insert:hover {
  fill: var(--accent);
  fill-opacity: 0.13;
}

/* A real HTML input positioned over the line it is editing — not SVG text, and not a
   foreignObject. That is what makes the caret, selection, clipboard, and IME behave
   exactly as they do in any other text field. */
.inline-editor {
  position: absolute;
  z-index: 5;
  margin: 0;
  padding: 0 3px;
  border: 1px solid var(--accent);
  border-radius: 2px;
  background: var(--panel-bg);
  color: var(--text);
  font-family: var(--diagram-font);
  line-height: 1.15;
  box-shadow: 0 0 0 2px var(--accent-soft);
  outline: none;
  resize: none;
  overflow: hidden;
}

/* A note is the one field whose content is genuinely multi-line, so it wraps and scrolls
   rather than clipping. */
textarea.inline-editor {
  overflow: auto;
  white-space: pre-wrap;
  padding: 4px 5px;
}

.inline-editor::selection { background: var(--accent-soft); }

/* --- printing ------------------------------------------------------------- */

/* Empty and hidden until something is printed. It is filled at `beforeprint` as well as
   by the Print button, so Ctrl+P and the browser's own menu print the diagram rather than
   a blank sheet. */
#print-area { display: none; }

@media print {
  /* The editor's shell is built to fill a window exactly once and never scroll. On paper
     that means one clipped screenful, so the layout is handed back to the flow. */
  html, body {
    height: auto;
    overflow: visible;
    display: block;
    background: #fff;
  }

  #toolbar, #workspace { display: none !important; }

  #print-area { display: block; }

  #print-area .print-title {
    font-size: 12pt;
    font-weight: 600;
    margin: 0 0 8pt;
  }

  /* Its own size, shrunk to the page when it does not fit. The viewBox does the fitting,
     so the drawing keeps its proportions either way. */
  #print-area svg {
    display: block;
    max-width: 100%;
    max-height: 92vh;
    height: auto;
  }

  @page { margin: 12mm; }
}