:root {
  --bg: #f4f4f1;
  --panel: #ffffff;
  --text: #1d1d1f;
  --muted: #6b6b70;
  --line: #e2e2dd;
  --accent: #2f6fde;
  --accent-text: #ffffff;
  --warn-bg: #fff4dc;
  --warn-text: #7a4b00;
  --ok: #1f8a4c;
  --bad: #c0392b;
  --stage: #ecece8;
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161618;
    --panel: #212124;
    --text: #ececef;
    --muted: #9a9aa2;
    --line: #34343a;
    --accent: #5b8ff0;
    --accent-text: #0d0d10;
    --warn-bg: #3a2d12;
    --warn-text: #ffd48a;
    --ok: #4cc884;
    --bad: #ff7b6b;
    --stage: #2a2a2e;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
h1 { font-size: 20px; margin: 0; }
h2 { font-size: 15px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
h3 { font-size: 13px; margin: 16px 0 8px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.top { padding: 18px 24px 4px; }
.top p { margin: 2px 0 0; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.step {
  display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); color: var(--accent-text); font-size: 12px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(340px, 1fr) minmax(340px, 1fr);
  gap: 16px;
  padding: 12px 24px 32px;
  align-items: start;
}
.col { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.col:last-child { position: sticky; top: 12px; }
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; padding: 12px 16px 24px; }
  .col:last-child { position: static; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 10px; }
.panel-head h2 { margin: 0; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 8px; }
.hint { margin: 0; color: var(--muted); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  border-radius: 8px; padding: 7px 12px; font: inherit; cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.small { padding: 4px 9px; font-size: 12px; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; background: transparent; color: var(--muted); padding: 5px 10px; font: inherit; cursor: pointer; }
.seg button.on { background: var(--accent); color: var(--accent-text); }
.seg button:disabled { opacity: .45; cursor: not-allowed; }

.stage {
  position: relative;
  border-radius: 8px;
  min-height: 260px;
  background-color: var(--stage);
  background-image:
    linear-gradient(45deg, rgba(128,128,128,.12) 25%, transparent 25%, transparent 75%, rgba(128,128,128,.12) 75%),
    linear-gradient(45deg, rgba(128,128,128,.12) 25%, transparent 25%, transparent 75%, rgba(128,128,128,.12) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
  overflow: hidden;
}
.stage.drag { outline: 2px dashed var(--accent); outline-offset: -6px; }
.image-canvas { display: block; width: 100%; height: 360px; cursor: crosshair; }
.image-canvas.empty { cursor: default; }
.drop-hint {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 6px; text-align: center; padding: 16px;
}
.drop-hint p { margin: 0; }
.loupe {
  position: absolute; pointer-events: none; border-radius: 8px;
  box-shadow: 0 4px 14px rgba(0,0,0,.3); background: #000;
}

.palette { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.palette li {
  display: grid;
  grid-template-columns: 22px 34px minmax(70px, 1fr) auto auto auto 28px;
  align-items: center; gap: 8px;
  padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px;
}
.palette li.flash { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 35%, transparent); }
.palette li.excluded .name, .palette li.excluded .pct { opacity: .5; text-decoration: line-through; }
.swatch { width: 22px; height: 22px; border-radius: 50%; border: 1px solid rgba(128,128,128,.4); }
.palette input[type=color] { width: 34px; height: 26px; padding: 0; border: 1px solid var(--line); border-radius: 6px; background: none; cursor: pointer; }
.palette .name { min-width: 0; width: 100%; }
.palette .pct { color: var(--muted); font-size: 12px; min-width: 34px; text-align: right; }
.palette .chk { font-size: 12px; color: var(--muted); display: flex; gap: 4px; align-items: center; white-space: nowrap; }
.palette .h { display: flex; gap: 4px; align-items: center; font-size: 12px; color: var(--muted); }
.palette .h input { width: 62px; }
.palette .del { border: 0; background: transparent; color: var(--muted); font-size: 18px; cursor: pointer; border-radius: 6px; }
.palette .del:hover { color: var(--bad); }
@media (max-width: 520px) {
  .palette li { grid-template-columns: 22px 34px 1fr 28px; }
  .palette .chk, .palette .h, .palette .pct { grid-column: 2 / -1; }
}

input[type=text], input[type=number], select {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 4px 6px;
}
input[type=number] { width: 76px; }

.mode { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.mode-opt { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.mode-opt:has(input:checked) { border-color: var(--accent); }
.mode-opt input { margin-top: 3px; }
.fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px 14px; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.field.check { flex-direction: row; align-items: center; gap: 6px; color: var(--text); font-size: 14px; }
.field.readout span { color: var(--text); font-size: 14px; padding-top: 5px; }
.unit { display: flex; align-items: center; gap: 6px; color: var(--muted); }
[hidden] { display: none !important; }

.viewer-panel { display: flex; flex-direction: column; }
.viewer { position: relative; height: min(56vh, 520px); min-height: 280px; border-radius: 8px; background: var(--stage); overflow: hidden; }
.viewer canvas { display: block; width: 100% !important; height: 100% !important; }
.viewer-msg { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); padding: 16px; text-align: center; pointer-events: none; }
.busy {
  position: absolute; top: 10px; right: 10px; padding: 4px 10px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--line); font-size: 12px;
}
.stats { color: var(--muted); font-size: 12px; text-align: right; }
.stats .ok { color: var(--ok); }
.stats .bad { color: var(--bad); }
.viewer-panel > p { margin: 8px 0 0; }

.exports { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.warnings:empty { display: none; }
.warnings { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.warn { background: var(--warn-bg); color: var(--warn-text); padding: 8px 10px; border-radius: 8px; font-size: 13px; }
.swaps { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 4px; }
.swaps .dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; vertical-align: -1px; margin-right: 4px; border: 1px solid rgba(128,128,128,.4); }
.export-group h3 { margin-top: 4px; }
.export-group + .export-group { border-top: 1px solid var(--line); margin-top: 12px; padding-top: 10px; }
.export-group p { margin: 0 0 8px; }