:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --panel: #fff;
  --text: #172033;
  --muted: #68738a;
  --border: #dfe4ef;
  --accent: #3967e8;
  --accent-strong: #244bc1;
  --shadow: 0 18px 50px rgba(29, 46, 87, .12);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
button, textarea, select { font: inherit; }
button { cursor: pointer; }
.app-shell { max-width: 1180px; margin: 0 auto; padding: 24px max(18px, env(safe-area-inset-left)) 40px; }
.app-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.eyebrow { margin: 0; color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: .16em; }
h1 { margin: 3px 0 0; font-size: clamp(24px, 4vw, 34px); line-height: 1.1; }
.editor-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); gap: 20px; align-items: start; }
.preview-panel, .form-panel { background: var(--panel); border: 1px solid var(--border); border-radius: 20px; box-shadow: var(--shadow); }
.preview-panel { padding: 14px; position: sticky; top: 14px; }
.form-panel { padding: 22px; }
.preview-toolbar, .field-heading, .action-row, .dialog-toolbar, .preview-meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.preview-toolbar { color: var(--muted); font-size: 12px; padding: 2px 2px 12px; }
.preview-stage { display: grid; place-items: center; min-height: 520px; width: 100%; overflow: hidden; border: 0; border-radius: 14px; background: #e9edf5; padding: 0; }
.preview-stage img { display: block; max-width: 100%; max-height: 70vh; object-fit: contain; }
.preview-stage img:not([src]) { display: none; }
#previewPlaceholder { color: var(--muted); padding: 30px; }
.preview-meta { padding: 10px 2px 0; color: var(--muted); font-size: 12px; }
.preview-meta a { color: var(--accent); font-weight: 700; }
.field-label, .field-heading label { display: block; font-weight: 750; }
.field-heading { margin-bottom: 7px; }
.field-heading span { color: var(--muted); font-size: 12px; font-weight: 500; }
.field-block { margin-top: 19px; }
.control, textarea { width: 100%; border: 1px solid var(--border); border-radius: 11px; background: var(--panel); color: var(--text); padding: 11px 12px; outline: none; }
textarea { resize: vertical; min-height: 44px; }
.control:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(57, 103, 232, .14); }
.compact { flex: 1; min-width: 0; padding: 9px 10px; }
.preset-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 8px; }
.preset { border: 1px solid var(--border); border-radius: 999px; background: transparent; color: var(--muted); padding: 5px 10px; font-size: 12px; }
.preset:hover { border-color: var(--accent); color: var(--accent); }
.primary-button, .secondary-button, .upload-button, .icon-button { border-radius: 10px; border: 0; padding: 10px 14px; font-weight: 700; }
.primary-button { background: var(--accent); color: #fff; }
.primary-button:hover { background: var(--accent-strong); }
.secondary-button, .upload-button { background: #edf1fb; color: var(--accent-strong); }
.secondary-button { white-space: nowrap; }
.icon-button { padding: 8px 11px; background: #edf1fb; color: var(--text); }
.action-row { margin-top: 9px; }
.suggestion { border: 1px solid #b9c8fa; background: #f0f4ff; border-radius: 11px; padding: 11px; margin-top: 10px; white-space: pre-wrap; }
.suggestion button { margin-top: 9px; }
.photo-tools { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }
.photo-tools textarea { margin-bottom: 9px; }
.upload-button { display: inline-flex; align-items: center; }
.upload-button input { display: none; }
.muted { color: var(--muted); font-size: 12px; min-height: 18px; }
.ready-button { width: 100%; margin-top: 24px; padding: 13px; }
.preview-dialog { width: min(96vw, 1000px); height: min(94vh, 900px); border: 0; padding: 12px; border-radius: 18px; background: #101523; color: #fff; }
.preview-dialog::backdrop { background: rgba(3, 7, 17, .82); }
.dialog-toolbar { margin-bottom: 10px; }
.dialog-toolbar .secondary-button, .dialog-toolbar .icon-button { background: #29334b; color: #fff; }
.zoom-viewport { display: grid; place-items: center; height: calc(100% - 48px); overflow: hidden; touch-action: none; }
.zoom-viewport img { max-width: 100%; max-height: 100%; transform-origin: center; transition: transform .15s ease; user-select: none; }
@media (max-width: 800px) {
  .app-shell { padding-top: 14px; }
  .editor-grid { grid-template-columns: 1fr; }
  .preview-panel { position: static; order: -1; }
  .preview-stage { min-height: 340px; }
  .form-panel { padding: 17px; }
}
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --bg: #101522; --panel: #182136; --text: #f2f5ff; --muted: #aab4ca; --border: #2d3953; --accent: #7c9aff; --accent-strong: #a7bbff; --shadow: 0 18px 50px rgba(0, 0, 0, .25); }
  .control, textarea { background: #141c2e; color: var(--text); }
  .preview-stage { background: #0d1321; }
  .secondary-button, .upload-button, .icon-button { background: #26314a; color: #dce5ff; }
  .suggestion { background: #202d4f; border-color: #526da9; }
}
body.manual-dark { color-scheme: dark; }