:root {
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
    Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-header {
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 10;
}
.app-header h1 { margin: 0; font-size: 20px; font-weight: 600; }

.layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 0;
  height: calc(100vh - 65px);
}

.upload-panel {
  border-right: 1px solid var(--border);
  padding: 16px;
}

.uploader {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  transition: border-color .2s ease, background .2s ease;
}

#fileInput { display: none; }
.upload-label {
  display: inline-block;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
  background: #fff;
}
.uploader:hover { border-color: var(--accent); background: #f8fafc; }

.btn-primary {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: transform .1s ease, opacity .2s ease;
  width: 100%;
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary:not(:disabled):active { transform: translateY(1px); }

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.status { margin-top: 8px; color: var(--muted); font-size: 12px; min-height: 22px; display: flex; align-items: center; }
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
}
.spinner {
  width: 12px; height: 12px; border: 2px solid #e5e7eb; border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: 100%;
}

.preview, .result {
  height: 100%;
  overflow: auto;
  padding: 16px;
}
.preview { border-right: 1px solid var(--border); }

.result { position: relative; }
.result-header { position: sticky; top: 0; background: #fff; z-index: 5; display: flex; align-items: center; justify-content: space-between; padding: 6px 0 8px; margin-bottom: 12px; border-bottom: 1px solid var(--border); }
.result-header h2 { display: none; }
.result-header .result-actions #saveAllBtn { display: none; }
.ghost-btn { border: 1px solid var(--border); background: #fff; padding: 8px 10px; border-radius: 8px; cursor: pointer; }

.preview .file-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
}
.preview iframe, .preview img, .preview video, .preview embed { width: 100%; height: calc(100vh - 160px); border: none; }

/* Highlight overlay */
.highlight-overlay {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 2;
  display: none;
}
.highlight-box {
  position: absolute;
  background: rgba(255, 230, 0, 0.28);
  outline: 2px solid rgba(255, 200, 0, 0.95);
  border-radius: 2px;
}

.result h2 { margin: 0 0 12px 0; }
.table-container { border: 1px solid var(--border); border-radius: 8px; overflow: auto; max-height: calc(100vh - 200px); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:nth-child(odd) { background: #fafafa; }
td { padding: 12px 14px; vertical-align: top; }
td.key { width: 35%; color: var(--muted); }
td.value { width: 65%; }
.row-actions { text-align: right; white-space: nowrap; }
.edit-btn, .save-btn, .cancel-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  margin-left: 6px;
}
.save-btn { border-color: #10b981; color: #047857; }
.cancel-btn { border-color: #f59e0b; color: #92400e; }
.value-input { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font: inherit; }

.loading {
  position: relative;
}
.loading::after {
  content: 'Processing…';
  position: absolute;
  top: 8px; right: 12px;
  font-size: 12px; color: var(--muted);
}