:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --border: #e3e6ee;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #3b6cf6;
  --primary-hover: #2d57d6;
  --danger: #dc2626;
  --success: #16a34a;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

header {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 16px;
}

header h1 {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: 0.5px;
}

.subtitle {
  color: var(--muted);
  margin: 0;
}

.subtitle code {
  background: #eef1f8;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 13px;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Drop zone */
.drop-zone {
  background: var(--panel);
  border: 2px dashed #cdd5e3;
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  transition: all 0.15s;
}

.drop-zone.dragover {
  border-color: var(--primary);
  background: #eef3ff;
}

.drop-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: #eef3ff;
  color: var(--primary);
  font-size: 28px;
  font-weight: 300;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-zone p {
  margin: 4px 0;
}

.drop-zone .hint {
  color: var(--muted);
  font-size: 13px;
}

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font: inherit;
  padding: 0 4px;
  text-decoration: underline;
}

/* Panels */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.panel.hidden { display: none; }

.panel h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 12px;
}

.panel-head h2 { margin: 0; }

.count {
  display: inline-block;
  background: #eef1f8;
  color: var(--muted);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 13px;
  margin-left: 6px;
}

.row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.row label {
  display: flex;
  flex-direction: column;
  font-size: 13px;
  color: var(--muted);
  gap: 4px;
}

.row select, .row input[type="text"] {
  min-width: 180px;
}

input[type="text"], input[type="number"], select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: #fff;
  color: var(--text);
}

input[type="text"]:focus, input[type="number"]:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 108, 246, 0.15);
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  transition: all 0.12s;
}

.btn:hover { background: #f4f6fb; }

.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn.primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

.btn.ghost {
  background: transparent;
}

.btn.danger {
  color: var(--danger);
  border-color: #f0c4c4;
}

.btn.danger:hover { background: #fdecec; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* File list */
.files-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.file-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  background: #fafbfd;
}

.file-card.processing {
  background: #fffaf0;
}

.file-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 12px;
}

.file-original {
  font-size: 13px;
  color: var(--muted);
  word-break: break-all;
  flex: 1;
}

.file-original .file-type-tag {
  display: inline-block;
  background: #eef1f8;
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 11px;
  margin-right: 6px;
  color: var(--text);
}

.file-status {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.file-status.ready { color: var(--success); }

.file-fields {
  display: grid;
  grid-template-columns: 80px 1.2fr 0.8fr 2fr auto;
  gap: 10px;
  align-items: end;
}

.file-fields label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  color: var(--muted);
  gap: 4px;
}

.file-fields input, .file-fields select {
  width: 100%;
}

.file-preview {
  margin-top: 10px;
  padding: 8px 12px;
  background: #eef3ff;
  border-radius: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  color: var(--primary);
  word-break: break-all;
}

.file-preview .label {
  color: var(--muted);
  margin-right: 8px;
  font-family: inherit;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 18px;
  padding: 4px 8px;
  border-radius: 6px;
}

.icon-btn:hover { background: #f0f0f0; color: var(--danger); }

.row-actions {
  display: flex;
  gap: 4px;
  align-items: center;
}

.empty {
  color: var(--muted);
  text-align: center;
  margin: 0;
}

/* Dialog */
dialog {
  border: none;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  width: min(560px, 92vw);
  max-height: 80vh;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.4);
}

dialog h2 {
  margin: 0 0 16px;
  font-size: 18px;
}

dialog h3 {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--muted);
}

.dialog-section {
  margin-bottom: 20px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
  min-height: 32px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #eef1f8;
  border-radius: 999px;
  padding: 4px 6px 4px 12px;
  font-size: 13px;
}

.chip button {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
  padding: 0 6px;
  border-radius: 50%;
  line-height: 1;
}

.chip button:hover { background: #d8def0; color: var(--danger); }

.add-row {
  display: flex;
  gap: 8px;
}

.add-row input { flex: 1; }

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 檔案檢視對話框 */
#viewerDialog {
  width: min(1200px, 96vw);
  max-width: 96vw;
  height: 90vh;
  max-height: 90vh;
  padding: 0;
  display: flex;
  flex-direction: column;
}

#viewerDialog[open] {
  display: flex;
}

.viewer-head {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.viewer-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  word-break: break-all;
}

.viewer-name-row {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: #fafbfd;
  flex-wrap: wrap;
}

.viewer-name-row label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
}

.viewer-name-row label.grow { flex: 1; min-width: 240px; }

.viewer-name-row input[type="text"] {
  width: 100%;
  font-size: 14px;
}

.viewer-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 0;
}

.viewer-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.viewer-pane + .viewer-pane {
  border-left: 1px solid var(--border);
}

.pane-head {
  padding: 8px 14px;
  font-size: 12px;
  color: var(--muted);
  background: #f4f6fb;
  border-bottom: 1px solid var(--border);
}

.pane-content {
  flex: 1;
  overflow: auto;
  background: #fff;
}

.pane-content.text {
  padding: 12px 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  user-select: text;
}

.pane-content iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.docx-render {
  padding: 18px 22px;
  font-size: 14px;
  line-height: 1.7;
}

.docx-render p { margin: 0 0 0.6em; }
.docx-render h1, .docx-render h2, .docx-render h3 { margin: 1em 0 0.4em; }
.docx-render table { border-collapse: collapse; margin: 8px 0; }
.docx-render td, .docx-render th { border: 1px solid #cbd5e1; padding: 4px 8px; }

.viewer-empty {
  color: var(--muted);
  padding: 24px;
  text-align: center;
}

@media (max-width: 820px) {
  .viewer-body {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  .viewer-pane + .viewer-pane {
    border-left: none;
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 720px) {
  .file-fields {
    grid-template-columns: 1fr 1fr;
  }
}