/*
 * draw — shared demo UI components.
 *
 * Every demo page links this file and builds its controls from these classes. Anything
 * that applies to more than one demo belongs here, not in a per-demo <style> block.
 * Per-demo CSS is for that demo's own stage only (grid shapes, specialty canvases).
 *
 * Layout is always: stage on the left, a narrow control panel on the right.
 */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --demo-bg:      #ffffff;
  --demo-fg:      #111111;
  --demo-muted:   #7a7a7a;
  --demo-line:    #e3e3e3;
  --demo-line-sub:#f0f0f0;
  --demo-hover:   #f0f0f0;
  --panel-width:  240px;
  --font-ui:      'Sora', sans-serif;
  --font-mono:    'Google Sans Code', ui-monospace, monospace;
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--demo-bg);
  color: var(--demo-fg);
  font-family: var(--font-ui);
}

/* ── Layout ──────────────────────────────────────────────────────────────── */

/*
 * Full size the layout fills the window. Embedded it is pinned to the size the
 * page's iframe reserves; `Viewport` adds `.embedded` when the URL says so.
 */
.demo-layout {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  position: relative;
  width: 100vw; height: 100vh;
}
.demo-layout.embedded { width: 960px; height: 620px; }
/* Try-drawing demos: a square canvas when embedded; full size still fills the window. */
.demo-layout.embedded.square { width: 860px; }

.canvas-wrap {
  flex: 1 1 auto;
  position: relative;
  min-width: 0;
  background: var(--demo-bg);
  overflow: hidden;
}
.canvas-wrap > canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}

/* ── Panel ───────────────────────────────────────────────────────────────── */

.dp-panel {
  width: var(--panel-width);
  flex: none;
  background: var(--demo-bg);
  border-left: 1px solid var(--demo-line);
  padding: 12px 14px 14px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.dp-hd {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 7px;
}
.dp-title {
  font-family: var(--font-ui);
  font-size: 0.58rem; font-weight: 700; letter-spacing: 0.2px;
  color: var(--demo-fg);
}
.dp-note {
  font-family: var(--font-ui);
  font-size: 0.54rem; line-height: 1.5; color: var(--demo-muted);
  margin-bottom: 8px;
}

.dp-divider { border: none; border-top: 1px solid var(--demo-line); margin: 10px 0; }
.dp-sub-divider { border: none; border-top: 1px solid var(--demo-line-sub); margin: 8px 0; }

.dp-label + .dp-row { margin-top: 5px; }

.dp-row {
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 5px;
}
.dp-label {
  font-family: var(--font-ui);
  font-size: 0.58rem; font-weight: 400; color: var(--demo-fg);
  min-width: 52px; flex-shrink: 0;
}
.dp-sub-label {
  font-family: var(--font-ui);
  font-size: 0.52rem; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--demo-muted);
  margin: 10px 0 5px;
}

/* Range slider */
.dp-range {
  flex: 1; min-width: 0; cursor: pointer;
  -webkit-appearance: none; appearance: none;
  height: 2px; background: #dddddd; outline: none;
}
.dp-range::-webkit-slider-runnable-track { height: 2px; background: #dddddd; }
.dp-range::-webkit-slider-thumb {
  -webkit-appearance: none; margin-top: -3.5px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--demo-fg); cursor: pointer;
}
.dp-range::-moz-range-track { height: 2px; background: #dddddd; }
.dp-range::-moz-range-thumb {
  width: 9px; height: 9px; border: none; border-radius: 50%;
  background: var(--demo-fg); cursor: pointer;
}

/* Read-only numeric value beside a slider */
.dp-val {
  font-family: var(--font-mono); font-size: 0.54rem;
  color: var(--demo-muted);
  width: 32px; text-align: right; flex-shrink: 0;
}

/* Select */
.dp-select {
  font-family: var(--font-ui); font-size: 0.58rem; font-weight: 500;
  border: 1px solid #cccccc; background: var(--demo-bg);
  padding: 3px 5px; width: 100%; cursor: pointer; color: var(--demo-fg);
}

/* Buttons */
.dp-btn {
  flex: 1;
  font-family: var(--font-ui); font-size: 0.56rem; font-weight: 500;
  border: 1px solid var(--demo-fg); background: var(--demo-fg); color: #ffffff;
  padding: 5px 8px; cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.dp-btn:hover { background: #333333; border-color: #333333; }
.dp-btn.secondary { background: transparent; color: var(--demo-fg); }
.dp-btn.secondary:hover { background: var(--demo-hover); }
.dp-btn.active { background: var(--demo-fg); color: #ffffff; border-color: var(--demo-fg); }
.dp-btn-row { display: flex; gap: 6px; margin-bottom: 6px; }
.dp-btn-row:last-child { margin-bottom: 0; }

/* A single floating action on the stage's corner, for a demo whose one
   control is an action on the whole canvas */
.dp-corner-btn {
  position: absolute; top: 14px; right: 14px; z-index: 6;
  font-family: var(--font-ui); font-size: 0.56rem; font-weight: 500;
  border: 1px solid var(--demo-fg); background: rgba(255, 255, 255, 0.85);
  color: var(--demo-fg); padding: 6px 12px; border-radius: 999px; cursor: pointer;
  transition: background 0.15s;
}
.dp-corner-btn:hover { background: #ffffff; }

/* Color swatches — current selections, filled from script */
.dp-swatch-row { display: flex; gap: 6px; margin-bottom: 6px; }
.dp-swatch {
  flex: 1; height: 20px;
  border: 1px solid var(--demo-line);
  background: transparent;
}

/* Canvas overlays — for demos whose stage is the whole window */
.dp-overlay-tr {
  position: absolute; top: 10px; right: 10px;
  display: flex; gap: 6px; z-index: 5;
}
.dp-overlay-tl {
  position: absolute; top: 10px; left: 10px;
  display: flex; gap: 6px; z-index: 7;
}
.dp-icon-btn {
  width: 28px; height: 28px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.45); border: none; color: #ffffff;
  cursor: pointer; padding: 0;
}
.dp-icon-btn:hover { background: rgba(0,0,0,0.62); }
.dp-icon-btn svg { width: 16px; height: 16px; fill: #ffffff; }
.dp-icon-btn.text {
  width: auto; padding: 0 10px;
  font-family: var(--font-ui); font-size: 0.56rem; color: #ffffff;
}
.dp-icon-btn.active { background: #ffffff; color: var(--demo-fg); }
.dp-icon-btn.active svg { fill: var(--demo-fg); }
.dp-overlay-panel {
  position: absolute; top: 44px; right: 10px;
  display: flex; align-items: center; gap: 6px;
  width: 200px; padding: 6px 10px; border-radius: 12px;
  background: rgba(0,0,0,0.45);
  z-index: 5;
}
.dp-overlay-panel .dp-label, .dp-overlay-panel .dp-val { color: #ffffff; }
.dp-overlay-panel + .dp-overlay-panel { top: 84px; }

/* The drawing tool component. The canvas always fills the window; the
   settings panel floats over its right edge, under the toggle button. */
.demo-layout.drawing-tool .canvas-wrap { cursor: crosshair; touch-action: none; }
.drawing-tool .dp-panel {
  position: absolute; right: 0; top: 0; height: 100%;
  padding-top: 44px;
  z-index: 6;
}
.drawing-tool .dp-overlay-tr { z-index: 7; }

.dp-overlay-panel .dp-range { background: rgba(255,255,255,0.35); }
.dp-overlay-panel .dp-range::-webkit-slider-runnable-track { background: rgba(255,255,255,0.35); }
.dp-overlay-panel .dp-range::-webkit-slider-thumb { background: #ffffff; }
.dp-overlay-panel .dp-range::-moz-range-track { background: rgba(255,255,255,0.35); }
.dp-overlay-panel .dp-range::-moz-range-thumb { background: #ffffff; }
.dp-dial-row { display: flex; gap: 6px; justify-content: center; }
.dp-dial.small { width: 40px; }
.dp-dial.small svg { width: 40px; height: 40px; }

/* Palette swatch grid, with the entries in use outlined */
.dp-swatch-grid { display: flex; flex-wrap: wrap; gap: 3px; margin-bottom: 6px; }
.dp-swatch-cell { width: 17px; height: 17px; border-radius: 3px; }
.dp-swatch-cell.selected { outline: 2px solid var(--demo-fg); outline-offset: -1px; }

/* While the pen is down every overlay fades out of the way. The panel keeps
   its layout space, so the canvas does not resize under the stroke. */
.dp-overlay-tr, .dp-overlay-tl, .dp-overlay-panel, .dp-dials,
.drawing-tool .dp-panel { transition: opacity 0.15s; }
.dp-ui-hidden .dp-overlay-tr, .dp-ui-hidden .dp-overlay-tl,
.dp-ui-hidden .dp-overlay-panel, .dp-ui-hidden .dp-dials, .dp-ui-hidden .dp-panel {
  opacity: 0; pointer-events: none;
}

.dp-btn:disabled, .dp-toggle:disabled, .dp-icon-btn:disabled {
  opacity: 0.4; pointer-events: none;
}

/* Checkbox row */
.dp-check {
  display: flex; align-items: center; gap: 6px; margin-bottom: 5px;
  font-family: var(--font-ui); font-size: 0.58rem; color: var(--demo-fg);
  cursor: pointer; user-select: none;
}
.dp-check input { margin: 0; accent-color: var(--demo-fg); }

/* Rotary dial — a circle and a line, dragged vertically */
.dp-dials {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; gap: 14px; z-index: 5;
}
.dp-dial { width: 56px; text-align: center; cursor: ns-resize; user-select: none; touch-action: none; }
.dp-dial svg { width: 56px; height: 56px; display: block; }
.dp-dial-label {
  font-family: var(--font-ui);
  font-size: 0.54rem; color: var(--demo-fg); margin-top: 2px;
  background: rgba(255,255,255,0.75);
}

/* Toggle button — ghost until on */
.dp-toggle {
  flex: 1;
  font-family: var(--font-ui); font-size: 0.56rem; font-weight: 400;
  border: 1px solid var(--demo-line); background: transparent; color: var(--demo-muted);
  padding: 5px 8px; cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.dp-toggle:hover:not(.active) { background: var(--demo-hover); color: var(--demo-fg); }
.dp-toggle.active { background: var(--demo-fg); border-color: var(--demo-fg); color: #ffffff; }

/* Collapsible section */
.dp-section-hd {
  display: flex; align-items: center; gap: 6px;
  cursor: pointer; user-select: none;
  margin-bottom: 7px;
}
.dp-section-hd:hover .dp-title { color: var(--demo-muted); }
.dp-chevron {
  width: 0; height: 0;
  border-left: 4px solid currentColor;
  border-top: 3.5px solid transparent;
  border-bottom: 3.5px solid transparent;
  color: var(--demo-muted);
  transform: rotate(90deg);
  transition: transform 0.15s;
}
.dp-section.collapsed .dp-chevron { transform: rotate(0deg); }
.dp-section-body {
  overflow: hidden;
  max-height: 1200px;
  transition: max-height 0.2s ease;
}
.dp-section.collapsed .dp-section-body { max-height: 0; }
.dp-section.collapsed .dp-section-hd { margin-bottom: 0; }

/* Stats readout, shown at the foot of a panel */
.dp-stats {
  font-family: var(--font-mono); font-size: 0.54rem; line-height: 1.7;
  color: var(--demo-muted);
}
.dp-stats strong { color: var(--demo-fg); font-weight: 500; }
.dp-stats span { display: flex; justify-content: space-between; gap: 8px; }
.dp-stats + .dp-sub-label { margin-top: 8px; }

/* Transient confirmation, centred over the stage */
.dp-toast {
  position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: 0.6rem;
  background: var(--demo-fg); color: #ffffff;
  padding: 4px 10px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.18s;
}
.dp-toast.visible { opacity: 1; }

/* Hue ring canvas in a panel */
.dp-ring {
  display: block;
  width: 100%; max-width: 180px; height: auto;
  margin: 2px auto 7px;
  cursor: grab;
  touch-action: none;
}
.dp-ring:active { cursor: grabbing; }