/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/*
 * IMPORTANT: several elements use display:flex but are toggled with the HTML
 * `hidden` attribute.  The UA stylesheet sets [hidden]{display:none} at low
 * specificity, so author display rules would override it.  This rule fixes
 * that for the entire document.
 */
[hidden] { display: none !important; }

:root {
  --bg-app:       #1a1b1e;
  --bg-toolbar:   #25262b;
  --bg-sidebar:   #1e2024;
  --bg-panel:     #25262b;
  --bg-canvas:    #111214;
  --bg-hover:     #2c2e33;
  --bg-active:    #373a40;

  --border:       #373a40;
  --border-sub:   #2c2e33;

  --text:         #c9cdd4;
  --text-muted:   #868e96;
  --text-dim:     #5c6370;

  --accent:       #4dabf7;
  --accent-dim:   rgba(28, 126, 214, 0.12);

  --swatch-c: #06b6d4;
  --swatch-m: #ec4899;
  --swatch-y: #fbbf24;
  --swatch-k: #9ca3af;

  --sidebar-w:   240px;
  --samples-w:   200px;
  --toolbar-h:    48px;
  --status-h:     26px;
  --r:  6px;
  --rs: 4px;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  --site-header-h: 56px;
}

html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--font);
  font-size: 13px;
  background: var(--bg-app);
  color: var(--text);
  line-height: 1.4;
}

/* ── App shell ────────────────────────────────────────────────────────────── */
#app {
  display: grid;
  grid-template-rows: var(--site-header-h) var(--toolbar-h) 1fr var(--status-h);
  height: 100vh;
}

/* ── Site header (dandl.at branding) ─────────────────────────────────────── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: #fff;
  border-bottom: 1px solid #e2e2e2;
  flex-shrink: 0;
  user-select: none;
}

.site-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #999;
  text-decoration: none;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: color 0.18s;
  min-width: 120px;
}
.site-back:hover { color: #1a1a1a; }
.site-back svg   { flex-shrink: 0; }

.site-logo-link  { display: flex; line-height: 0; text-decoration: none; }
.site-logo-svg   { display: block; }

.site-section {
  min-width: 120px;
  text-align: right;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #bbb;
}

/* ── Toolbar ──────────────────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 12px;
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border);
  user-select: none;
  flex-shrink: 0;
  overflow: hidden;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.toolbar-group + .toolbar-group {
  margin-left: 6px;
  padding-left: 10px;
  border-left: 1px solid var(--border);
}

.app-logo { display: flex; align-items: center; color: var(--accent); }
.app-title { font-weight: 600; font-size: 13px; white-space: nowrap; margin-left: 6px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: var(--rs);
  background: var(--bg-active);
  color: var(--text);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.12s, border-color 0.12s;
}
.btn:hover  { background: var(--bg-hover); border-color: #4c5058; }
.btn:active { background: var(--border); }

.btn-open {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}
.btn-open:hover  { background: #339af0; border-color: transparent; }
.btn-open:active { background: #228be6; }

.btn-icon {
  padding: 5px 6px;
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}
.btn-icon:hover           { background: var(--bg-hover); border-color: var(--border); color: var(--text); }
.btn-icon:disabled        { opacity: 0.35; cursor: not-allowed; }
.btn-icon:disabled:hover  { background: transparent; border-color: transparent; }

.btn-text {
  padding: 5px 8px;
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
  font-size: 12px;
}
.btn-text:hover           { background: var(--bg-hover); border-color: var(--border); color: var(--text); }
.btn-text:disabled        { opacity: 0.35; cursor: not-allowed; }
.btn-text:disabled:hover  { background: transparent; border-color: transparent; }

.page-info {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
  min-width: 60px;
  text-align: center;
}

.zoom-level {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
  min-width: 38px;
  text-align: center;
}

/* ── Layout ───────────────────────────────────────────────────────────────── */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--samples-w);
  overflow: hidden;
  min-height: 0;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar::-webkit-scrollbar       { width: 6px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Panels */
.panel { flex-shrink: 0; }
.panel + .panel { border-top: 1px solid var(--border); }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px 7px;
}

.panel-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.panel-actions { display: flex; gap: 4px; }

.micro-btn {
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: 10px;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}
.micro-btn:hover { background: var(--bg-hover); color: var(--text-muted); }

/* Separations */
.sep-list { list-style: none; padding: 4px 0 8px; }
.sep-item { padding: 1px 0; }

.sep-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  cursor: pointer;
  transition: background 0.1s;
}
.sep-label:hover { background: var(--bg-hover); }

/* Custom checkbox */
.sep-label input[type="checkbox"],
.layer-row  input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  border: 1.5px solid var(--border);
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: background 0.12s, border-color 0.12s;
}
.sep-label input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}
.layer-row input[type="checkbox"]:checked {
  background: #69db7c;
  border-color: #69db7c;
}
.sep-label input[type="checkbox"]:checked::after,
.layer-row  input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 3px; top: 1px;
  width: 6px; height: 10px;
  border: 2px solid #fff;
  border-top: none; border-left: none;
  transform: rotate(45deg) scaleY(0.85);
}

/* Color swatches */
.swatch {
  width: 28px; height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.08);
}
.swatch-c { background: var(--swatch-c); }
.swatch-m { background: var(--swatch-m); }
.swatch-y { background: var(--swatch-y); }
.swatch-k { background: var(--swatch-k); }

/* Dim swatch + name when channel is off */
.sep-label:has(input:not(:checked)) .swatch   { opacity: 0.2; }
.sep-label:has(input:not(:checked)) .sep-name { opacity: 0.38; }

.sep-name { font-size: 13px; color: var(--text); }

/* Layers */
.panel-layers {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.layers-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0 8px;
}
.layers-list::-webkit-scrollbar       { width: 5px; }
.layers-list::-webkit-scrollbar-track { background: transparent; }
.layers-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.layer-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  cursor: pointer;
  transition: background 0.1s;
}
.layer-row:hover { background: var(--bg-hover); }

.layer-name {
  font-size: 12px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-hint {
  padding: 12px;
  font-size: 12px;
  color: var(--text-dim);
  font-style: italic;
}

/* ── Canvas area ──────────────────────────────────────────────────────────── */
.canvas-area {
  position: relative;
  background: var(--bg-canvas);
  overflow: auto;
}

.canvas-area::-webkit-scrollbar        { width: 10px; height: 10px; }
.canvas-area::-webkit-scrollbar-track  { background: var(--bg-canvas); }
.canvas-area::-webkit-scrollbar-thumb  { background: #373a40; border-radius: 5px; border: 2px solid var(--bg-canvas); }
.canvas-area::-webkit-scrollbar-corner { background: var(--bg-canvas); }

/* Copyright watermark — fixed in the bottom-right corner of the canvas area */
#canvas-area::after {
  content: 'Peter Zeppezauer / Albert Dandl \00A9 2026';
  position: fixed;
  bottom: calc(var(--status-h) + 10px);
  right: calc(var(--samples-w) + 14px);
  font-size: 10px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.13);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

/* Drop zone */
.drop-zone {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, outline-color 0.15s;
}
.drop-zone.drag-active {
  background: var(--accent-dim);
  outline: 2px dashed var(--accent);
  outline-offset: -12px;
}

.drop-zone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-dim);
  text-align: center;
  pointer-events: none;
}
.drop-zone-inner svg   { opacity: 0.3; margin-bottom: 4px; }
.drop-zone-title       { font-size: 15px; font-weight: 600; color: var(--text-muted); }
.drop-zone-sub         { font-size: 12px; color: var(--text-dim); }
.drop-zone-sub strong  { color: var(--text-muted); }

/* Canvas wrapper */
.canvas-wrap {
  display: flex;
  justify-content: center;
  padding: 24px;
  min-width: max-content;
}

#pdf-canvas {
  display: block;
  background: #fff;
  box-shadow: 0 4px 32px rgba(0,0,0,0.55);
  /* Crisp pixel rendering for colour-accurate prepress work */
  image-rendering: crisp-edges;
  image-rendering: pixelated;
}

/* ── Spinner overlay ──────────────────────────────────────────────────────── */
.spinner-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.42);
  z-index: 20;
}

.spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Status bar ───────────────────────────────────────────────────────────── */
.statusbar {
  display: flex;
  align-items: center;
  padding: 0 12px;
  background: var(--bg-toolbar);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
}

#status-msg {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Eyedropper tool ──────────────────────────────────────────────────────── */

/* Active (toggled-on) state for the eyedropper button */
.btn-icon.btn-active {
  background: var(--accent-dim);
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
.btn-icon.btn-active:hover {
  background: rgba(28, 126, 214, 0.2);
}

/* Crosshair cursor on the canvas while the eyedropper is active */
.canvas-area.eyedropper-active         { cursor: crosshair; }
.canvas-area.eyedropper-active #pdf-canvas { cursor: crosshair; }

/* ── Density tooltip ──────────────────────────────────────────────────────── */
.density-tooltip {
  position: fixed;
  z-index: 1000;
  width: 192px;
  background: #1e2024;
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: 0 8px 28px rgba(0,0,0,0.55);
  overflow: hidden;
  pointer-events: none; /* never blocks mouse events on the canvas */
  display: flex;
  flex-direction: column;
}

/* Sampled colour swatch at the top */
.dt-swatch {
  height: 30px;
  flex-shrink: 0;
  background: #fff; /* overridden dynamically */
  border-bottom: 1px solid var(--border);
}

/* Channel rows */
.dt-body {
  padding: 8px 10px 7px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.dt-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Channel letter label, coloured per ink */
.dt-ch {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  width: 12px;
  flex-shrink: 0;
  text-align: center;
}
.dt-ch-c { color: var(--swatch-c); }
.dt-ch-m { color: var(--swatch-m); }
.dt-ch-y { color: var(--swatch-y); }
.dt-ch-k { color: var(--swatch-k); }

/* Mini progress bar */
.dt-track {
  flex: 1;
  height: 5px;
  background: rgba(255,255,255,0.07);
  border-radius: 3px;
  overflow: hidden;
}
.dt-fill {
  height: 100%;
  width: 0%;
  border-radius: 3px;
  transition: width 0.04s linear;
}
.dt-fill-c { background: var(--swatch-c); }
.dt-fill-m { background: var(--swatch-m); }
.dt-fill-y { background: var(--swatch-y); }
.dt-fill-k { background: var(--swatch-k); }

/* Percentage label */
.dt-pct {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  min-width: 34px;
  text-align: right;
  flex-shrink: 0;
}

/* Divider between channels and TAC */
.dt-divider {
  height: 1px;
  background: var(--border-sub);
  margin: 2px 0 1px;
}

/* TAC row — Total Area Coverage */
.dt-tac-row { justify-content: space-between; }

.dt-tac-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.dt-tac-pct { color: var(--text); font-weight: 600; }

/* ── Canvas container + marks overlay ────────────────────────────────────── */

/*
 * Shrink-wraps around the canvas so the SVG overlay can use
 * position:absolute and cover exactly the canvas area.
 */
.canvas-container {
  position: relative;
  display: inline-block; /* hug canvas dimensions */
  line-height: 0;        /* kill inline gap below canvas */
}

/*
 * SVG overlay for persistent sample-point crosses.
 * pointer-events:none so all mouse events pass through to the canvas.
 */
.marks-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  overflow: visible; /* allow badges that sit outside the mark pixel to show */
}

/* ── Sample points panel (right sidebar) ─────────────────────────────────── */
.samples-panel {
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.samples-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0 8px;
}
.samples-list::-webkit-scrollbar       { width: 5px; }
.samples-list::-webkit-scrollbar-track { background: transparent; }
.samples-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* "Danger" tint for the Clear button */
.micro-btn-danger       { color: #fa5252; border-color: rgba(250,82,82,0.3); }
.micro-btn-danger:hover { background: rgba(250,82,82,0.12); color: #ff6b6b; border-color: #fa5252; }

/* Individual sample entry */
.sample-item {
  padding: 8px 10px 7px;
  border-bottom: 1px solid var(--border-sub);
}
.sample-item:last-child { border-bottom: none; }

.sample-header {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 5px;
}

/* Numbered badge matching the SVG cross badge colour */
.sample-badge {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  font-family: var(--mono);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sample-swatch {
  width: 22px; height: 13px;
  border-radius: 2px;
  border: 1px solid rgba(255,255,255,0.1);
  flex-shrink: 0;
}

.sample-page {
  font-size: 10px;
  font-family: var(--mono);
  color: var(--text-dim);
  flex: 1;
}

.sample-del {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 3px;
  border-radius: 3px;
  transition: background 0.1s, color 0.1s;
}
.sample-del:hover { background: rgba(250,82,82,0.15); color: #ff6b6b; }

/* CMYK value rows inside each sample */
.sv-rows { display: flex; flex-direction: column; gap: 2px; }

.sv-row {
  display: flex;
  align-items: center;
  gap: 5px;
}

.sv-ch {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  width: 11px;
  flex-shrink: 0;
}
.sv-c { color: var(--swatch-c); }
.sv-m { color: var(--swatch-m); }
.sv-y { color: var(--swatch-y); }
.sv-k { color: var(--swatch-k); }

.sv-bar-track {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.07);
  border-radius: 2px;
  overflow: hidden;
}
.sv-bar-fill {
  height: 100%;
  border-radius: 2px;
}
.sv-bar-c { background: var(--swatch-c); }
.sv-bar-m { background: var(--swatch-m); }
.sv-bar-y { background: var(--swatch-y); }
.sv-bar-k { background: var(--swatch-k); }

.sv-pct {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
  min-width: 30px;
  text-align: right;
  flex-shrink: 0;
}

/* TAC row */
.sv-tac {
  margin-top: 3px;
  padding-top: 4px;
  border-top: 1px solid var(--border-sub);
  justify-content: space-between;
}
.sv-tac-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.sv-tac .sv-pct { color: var(--text); font-weight: 600; min-width: auto; }