:root {
  --bg: #0b1512;
  --panel: #111c18;
  --text: #eef2ef;
  --muted: #aab7b0;
  --border: rgba(255,255,255,.10);
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top, #13221d, var(--bg) 45%);
  color: var(--text);
  overflow-x: hidden;
}
body, input, select, button, textarea {
  font: 16px/1.45 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
img { max-width: 100%; display: block; }
button { cursor: pointer; }
.shell { width: min(1440px, calc(100vw - 20px)); margin: 20px auto 36px; display: grid; gap: 20px; }
.hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; align-items: stretch; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; color: var(--muted); font-size: 12px; margin: 0 0 10px; }
h1 { margin: 0 0 12px; font-size: clamp(2rem, 4vw, 3.1rem); line-height: 1.05; }
h2 { margin: 0 0 10px; font-size: 1.1rem; }
.lede { margin: 0; color: var(--muted); max-width: 72ch; }
.upload-card, .panel { border: 1px solid var(--border); background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02)); border-radius: 18px; box-shadow: 0 10px 30px rgba(0,0,0,.18); }
.upload-card { min-height: 160px; padding: 22px; display: grid; gap: 10px; align-content: center; color: var(--text); }
.upload-card input { display: none; }
.upload-card span { font-size: 1.1rem; font-weight: 700; }
.upload-card small { color: var(--muted); }
.grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.hidden { display: none; }
.panel { padding: 16px; min-width: 0; }
.stack { display: grid; gap: 16px; }
.stats, .muted { color: var(--muted); margin: 0 0 12px; }
.heading-row { display:flex; align-items:center; justify-content:space-between; gap:12px; }
.pill { font-size: 12px; color: var(--muted); background: rgba(255,255,255,.06); border: 1px solid var(--border); border-radius: 999px; padding: 6px 10px; white-space: nowrap; }
#previewImage, #livePreviewImage { width: 100%; border-radius: 14px; background: #f2f2f2; }
.original-block img {
  max-height: 140px;
  width: auto;
  max-width: 100%;
  margin-inline: auto;
  object-fit: contain;
}
.preview-block img {
  max-height: 220px;
  width: auto;
  max-width: 100%;
  margin-inline: auto;
  object-fit: contain;
}
.swatches { display: grid; gap: 12px; }
.swatch-row {
  display: grid;
  grid-template-columns: 54px minmax(118px, 0.9fr) minmax(132px, 1.05fr) minmax(190px, 1.1fr);
  gap: 12px;
  align-items: center;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  border-radius: 16px;
  padding: 12px;
  min-width: 0;
}
.swatch-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.swatch-row input[type="checkbox"] { width: 18px; height: 18px; margin: 0; flex: 0 0 auto; }
.chip {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.08);
  flex: 0 0 auto;
}
.chip-light { box-shadow: inset 0 0 0 1px rgba(0,0,0,.32); }
.swatch-meta {
  min-width: 0;
  display: grid;
  gap: 2px;
}
.swatch-meta strong,
.swatch-meta small {
  display: block;
  min-width: 0;
  overflow-wrap: normal;
  word-break: normal;
}
.swatch-meta strong { line-height: 1.1; font-size: .95rem; white-space: nowrap; }
.swatch-meta small { color: var(--muted); line-height: 1.25; font-size: .92rem; }
.plate-name,
.merge-target {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
  padding: 0 12px;
  appearance: none;
}
.merge-target { cursor: pointer; }
.merge-target option { background: #1b231f; color: #eef2ef; }
.plate-name:focus, .merge-target:focus, input[type="range"]:focus, button:focus {
  outline: 2px solid rgba(130, 206, 167, .45);
  outline-offset: 1px;
}
.controls { display: grid; gap: 16px; margin-top: 18px; }
.controls label { display: grid; gap: 8px; }
.checkbox-row { grid-template-columns: auto 1fr; align-items: start; gap: 12px; }
.checkbox-row span { display: grid; gap: 4px; }
.checkbox-row small, .controls label small { color: var(--muted); }
input[type="range"] { width: 100%; }
.primary {
  width: 100%;
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  background: linear-gradient(180deg, #4f8a70, #35634f);
  color: white;
  font-weight: 700;
  margin-top: 18px;
}
.primary:disabled { opacity: .6; cursor: not-allowed; }
.export-links { display: grid; gap: 12px; }
.export-links a {
  display: inline-block;
  color: white;
  text-decoration: none;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  padding: 12px 14px;
  border-radius: 12px;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
}
@media (max-width: 780px) {
  .grid { grid-template-columns: 1fr; }
  .original-block img { max-height: 150px; }
  .preview-block img { max-height: 260px; }
}
@media (max-width: 980px) {
  .swatch-row { grid-template-columns: 54px minmax(0, 1fr); }
  .plate-name, .merge-target { grid-column: 2; }
}
@media (max-width: 620px) {
  .shell { width: min(100vw - 12px, 1000px); }
  .swatch-row { grid-template-columns: 1fr; }
  .swatch-left { justify-content: flex-start; }
  .plate-name, .merge-target { grid-column: auto; }
}

.inline-export{margin-top:14px;padding-top:10px;border-top:1px solid var(--border);}
.inline-export.hidden{display:none;}
.inline-export h3{margin:0 0 10px;font-size:1rem;}
.export-links .primary{display:block;text-align:center;margin:0;}
.export-links a{width:100%;text-align:center;}