.office-preview-root {
  z-index: 50;
  background: var(--bg);
  display: none;
  flex-direction: column;
  position: fixed;
  inset: 56px 0 0;
}
.office-preview-root.is-open {
  display: flex;
}
.office-tabs {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex: 0 0 43px;
  overflow: hidden;
}
.office-tabs-inner {
  align-items: stretch;
  max-width: 1240px;
  height: 43px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  overflow-x: auto;
}
.office-tab {
  border-left: 1px solid var(--border);
  align-items: center;
  min-width: 140px;
  max-width: 270px;
  display: flex;
  position: relative;
}
.office-tab:last-of-type {
  border-right: 1px solid var(--border);
}
.office-tab.active {
  color: var(--text);
  background: var(--surface-soft);
}
.office-tab.active:after {
  content: "";
  background: var(--accent);
  height: 2px;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
}
.office-tab-name,
.office-tab-close {
  color: var(--muted);
  cursor: pointer;
  background: 0 0;
  border: 0;
}
.office-tab-name {
  align-items: center;
  gap: 7px;
  min-width: 0;
  padding: 0 8px 0 12px;
  font-size: 12px;
  display: flex;
}
.office-tab-name span {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}
.office-tab-kind {
  color: var(--accent);
  letter-spacing: 0.04em;
  background: var(--accent-soft);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 9px;
  font-weight: 750;
  flex: 0 0 auto;
}
.office-tab-close {
  border-radius: 5px;
  width: 28px;
  height: 28px;
  margin-left: auto;
  font-size: 17px;
}
.office-tab-close:hover {
  color: var(--text);
  background: var(--border);
}
.office-meta {
  color: var(--muted);
  background: var(--surface-soft);
  border-bottom: 1px solid var(--border);
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 10px 18px;
  font-size: 12px;
  display: flex;
  flex: 0 0 auto;
}
.office-meta > span {
  align-items: center;
  gap: 7px;
  display: inline-flex;
  min-width: 0;
}
.office-meta strong {
  color: var(--text);
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  font-weight: 650;
}
.office-stage {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 20px;
}
.office-page {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  max-width: 1180px;
  margin: 0 auto 24px;
  min-height: 240px;
}
.office-loading,
.office-error,
.office-empty {
  color: var(--muted);
  text-align: center;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 80px 24px;
  display: flex;
}
.office-loading i {
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  animation: 0.8s linear infinite spin;
}
.office-error {
  color: var(--danger);
}
.office-error strong {
  color: var(--danger);
}

.office-image-wrap {
  justify-content: center;
  align-items: center;
  min-height: 360px;
  padding: 24px;
  display: flex;
}
.office-image-wrap img {
  max-width: 100%;
  max-height: calc(100vh - 220px);
  object-fit: contain;
  border-radius: 6px;
}

.office-docx {
  padding: 16px 12px 32px;
  overflow: auto;
}
.office-docx .docx-wrapper {
  background: transparent !important;
  padding: 0 !important;
}
.office-docx .docx-wrapper > section.docx {
  box-shadow: none !important;
  border: 1px solid var(--border);
  margin: 0 auto 16px !important;
}

.office-excel-tabs {
  gap: 6px;
  padding: 10px 14px 0;
  display: flex;
  overflow-x: auto;
}
.office-excel-tab {
  color: var(--muted);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  cursor: pointer;
  border-radius: 7px 7px 0 0;
  padding: 7px 12px;
  font-size: 12px;
  white-space: nowrap;
}
.office-excel-tab.active {
  color: var(--accent);
  background: var(--surface);
  border-bottom-color: var(--surface);
  font-weight: 650;
}
.office-excel-scroll {
  border-top: 1px solid var(--border);
  overflow: auto;
  max-height: calc(100vh - 240px);
}
.office-excel-scroll table {
  border-collapse: collapse;
  width: max-content;
  min-width: 100%;
  font-size: 13px;
}
.office-excel-scroll th,
.office-excel-scroll td {
  text-align: left;
  border: 1px solid var(--border);
  padding: 6px 10px;
  white-space: nowrap;
  max-width: 360px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.office-excel-scroll th {
  color: var(--muted);
  background: var(--surface-soft);
  font-size: 12px;
  font-weight: 750;
  position: sticky;
  top: 0;
  z-index: 1;
}
.office-excel-scroll tr:nth-child(2n) td {
  background: var(--surface-soft);
}

.office-ppt-nav {
  justify-content: center;
  align-items: center;
  gap: 12px;
  padding: 0 0 16px;
  display: flex;
}
.office-ppt-nav button {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  border-radius: 8px;
  width: 36px;
  height: 36px;
}
.office-ppt-nav button:disabled {
  opacity: 0.4;
  cursor: default;
}
.office-ppt-nav span {
  color: var(--muted);
  min-width: 72px;
  text-align: center;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.office-slide-frame {
  width: min(100%, 960px);
  margin: 8px auto 18px;
  aspect-ratio: 16 / 9;
  background: #111;
  border: 1px solid var(--border);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}
.office-slide {
  transform-origin: top left;
  position: absolute;
  left: 0;
  top: 0;
  overflow: hidden;
}
.office-slide-el {
  position: absolute;
  box-sizing: border-box;
  overflow: hidden;
}
.office-slide-el img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.office-slide-text {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.25;
}
.office-slide-text p {
  margin: 0 0 0.2em;
}
.office-slide-ph {
  color: #999;
  background: rgba(255, 255, 255, 0.08);
  border: 1px dashed rgba(255, 255, 255, 0.25);
  font-size: 12px;
  place-items: center;
  display: grid;
}
.office-filmstrip {
  gap: 8px;
  max-width: 960px;
  margin: 0 auto 20px;
  padding: 0 4px 8px;
  display: flex;
  overflow-x: auto;
}
.office-thumb {
  color: var(--muted);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  cursor: pointer;
  border-radius: 6px;
  flex: 0 0 72px;
  height: 42px;
  font-size: 11px;
  font-weight: 700;
}
.office-thumb.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.office-meta-actions {
  align-items: center;
  gap: 8px;
  display: flex;
  flex: 0 0 auto;
}
.office-text-note {
  color: var(--warning);
  background: var(--warning-soft);
  padding: 8px 16px;
  font-size: 12px;
}
.office-text {
  color: var(--text);
  margin: 0;
  padding: 18px 20px 28px;
  font-family: Cascadia Code, Consolas, ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: auto;
  max-height: calc(100vh - 220px);
}
.office-pdf-frame {
  width: min(100%, 960px);
  margin: 12px auto 8px;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: center;
  overflow: auto;
}
.office-pdf-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  background: #fff;
}
.office-markdown {
  padding: clamp(24px, 4vw, 48px);
  max-width: 860px;
  margin: 0 auto;
}
.office-markdown img {
  max-width: 100%;
  height: auto;
}
.office-zip-note {
  color: var(--muted);
  padding: 14px 18px 0;
  font-size: 12px;
}
.office-zip-list {
  display: grid;
  gap: 8px;
  padding: 12px 14px 18px;
}
.office-zip-item {
  color: var(--text);
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  border-radius: 8px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  display: flex;
  width: 100%;
}
.office-zip-item:hover {
  background: var(--surface-soft);
  border-color: color-mix(in srgb, var(--muted) 45%, var(--border));
}
.office-zip-path {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  min-width: 0;
  flex: 1;
  font-size: 13px;
}
.office-zip-item small {
  color: var(--muted);
  flex: 0 0 auto;
  font-size: 11px;
}

@media (width <= 700px) {
  .office-preview-root {
    inset: 56px 0 0;
  }
  .office-stage {
    padding: 10px 12px 20px;
  }
  .office-tab {
    min-width: 112px;
    max-width: 180px;
  }
  .office-meta {
    padding: 10px 12px 0;
  }
}

/* visual polish overrides */
.office-tabs {
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  flex: 0 0 44px;
}
.office-tabs-inner {
  max-width: var(--max, 1080px);
  height: 44px;
  padding: 0 12px;
}
.office-tab {
  border-left: 0;
  border-right: 0 !important;
  min-width: 128px;
  max-width: 220px;
  margin-right: 4px;
  border-radius: 8px 8px 0 0;
}
.office-tab.active {
  background: var(--accent-soft);
}
.office-tab.active:after {
  left: 10px;
  right: 10px;
  border-radius: 2px;
}
.office-meta {
  background: transparent;
  border-bottom: 0;
  max-width: var(--max, 1080px);
  padding: 12px 16px 4px;
}
.office-stage {
  padding: 12px 16px 28px;
}
.office-page {
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.office-markdown {
  padding: clamp(24px, 4vw, 44px);
  max-width: 820px;
}
.office-markdown:has(.md-mermaid) {
  max-width: min(1180px, 100%);
}
.office-markdown img {
  border-radius: 8px;
}
.office-zip-item {
  border-radius: 10px;
}
.office-tab-kind {
  border-radius: 999px;
  padding: 2px 7px;
  font-size: 10px;
  font-weight: 650;
}