:root { font-family: Arial, sans-serif; color-scheme: light; }
body { margin: 0; background: #f5f7fb; color: #222; }
.container { max-width: 1100px; margin: 24px auto; padding: 0 16px; }
.card { background: #fff; border: 1px solid #e4e7ee; border-radius: 10px; padding: 16px; margin-bottom: 16px; }

.workflow-tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.workflow-tab { width: auto; margin-top: 0; background: #e5e7eb; color: #111827; border: 1px solid #d1d5db; padding: 8px 12px; }
.workflow-tab.active { background: #111827; color: #fff; border-color: #111827; }

.workspace-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 18px; align-items: start; }
.workspace-column { min-width: 0; }
.workspace-edit-column { border-left: 1px solid #e4e7ee; padding-left: 18px; }
.workspace-edit-column > h2,
.input-panel > h2 { margin-top: 0; }

.dropzone { border: 2px dashed #98a3b3; padding: 20px; text-align: center; border-radius: 8px; cursor: pointer; }
.dropzone.dragover { border-color: #2563eb; background: #eff6ff; }
.preview { margin-top: 12px; max-width: 100%; max-height: 320px; display: none; border-radius: 8px; }
.meta { color: #4b5563; font-size: 14px; }
.file-list { margin: 10px 0 0; padding-left: 20px; color: #374151; font-size: 14px; }
ul.file-list:empty { display: none; }

.product-preview-wrap { margin-top: 12px; }
.product-preview { width: 100%; max-width: 240px; border: 1px solid #d1d5db; border-radius: 6px; display: block; background: #fff; }

label { display: block; margin: 10px 0 6px; font-weight: 600; }
textarea, select, button { width: 100%; padding: 10px; border-radius: 8px; border: 1px solid #cbd5e1; box-sizing: border-box; }
input { width: 100%; padding: 10px; border-radius: 8px; border: 1px solid #cbd5e1; box-sizing: border-box; }
select:disabled { background: #eef2f7; color: #4b5563; cursor: not-allowed; }
button { background: #111827; color: #fff; border: none; cursor: pointer; margin-top: 12px; }
button:disabled { opacity: .6; cursor: not-allowed; }

.error { color: #b91c1c; background: #fef2f2; border: 1px solid #fecaca; padding: 10px; border-radius: 8px; }
.loading { color: #1d4ed8; }
.hidden { display: none; }

.result-image-wrap { margin-top: 12px; }
.result-preview { width: 100%; max-height: none; }
.download-btn { display: inline-block; margin-top: 12px; text-decoration: none; background: #2563eb; color: #fff; padding: 10px 14px; border-radius: 8px; font-weight: 600; }

.page-footer { display: flex; align-items: center; gap: 12px; justify-content: space-between; margin: 8px 0 20px; flex-wrap: wrap; }
.usage-text { margin: 0; color: #374151; font-size: 14px; }
.limit-hint { margin: 0; color: #b91c1c; font-size: 14px; }

@media (max-width: 900px) {
  .workspace-grid { grid-template-columns: 1fr; gap: 14px; }
  .workspace-edit-column { border-left: 0; border-top: 1px solid #e4e7ee; padding-left: 0; padding-top: 14px; }
}