:root {
  --bg: #f6f7f9;
  --card: #fff;
  --text: #1f2430;
  --muted: #556074;
  --border: #dce2ea;
  --brand: #fa6742;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 28px 16px 42px;
}
h1 { margin: 0 0 8px; }
.sub { margin: 0 0 18px; color: var(--muted); }
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
.field { display: block; margin-bottom: 12px; }
.field span { display: block; font-size: 14px; color: var(--muted); margin-bottom: 6px; }
input[type="file"], input[type="url"], input[type="text"], input[type="color"], select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
input[type="color"] {
  min-height: 42px;
  padding: 6px;
}
.btn {
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 700;
  cursor: pointer;
}
.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.customize {
  margin-bottom: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: #fafbfc;
}
.customize summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  margin: 2px 0;
}
.customize-grid {
  margin-top: 10px;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.btn-secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--brand);
  color: var(--brand);
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.status {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}
ul { margin-top: 8px; }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  background: #fafbfc;
  padding: 18px;
  text-align: center;
  margin-bottom: 14px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.drop-zone p {
  margin: 4px 0;
  color: var(--muted);
}
.drop-zone strong {
  color: var(--text);
}
.drop-zone.active {
  border-color: var(--brand);
  background: #fff4f1;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 10px;
}
.preview-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}
.preview-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}
.preview-card .meta {
  padding: 8px;
}
.preview-card h3 {
  margin: 0 0 4px;
  font-size: 13px;
  line-height: 1.3;
}
.preview-card p {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

.preview-frame-wrap {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}
#previewFrame {
  width: 100%;
  height: 720px;
  border: 0;
  display: block;
  background: #fff;
}