:root {
  --bg: #f3f3f3;
  --panel: #ffffff;
  --line: #e1e1e1;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #217346;
  --accent-dark: #1a5c38;
  --status-bg: #fafafa;
  --excel-comment-bg: #ffffcc;
  --excel-comment-border: #d4d4a0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
}

.layout {
  height: 100vh;
  display: grid;
  grid-template-rows: auto auto 1fr auto auto;
}

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.excel-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--accent);
  color: #fff;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.excel-logo {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.18);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 16px;
}

.file-name {
  font-size: 14px;
  font-weight: 600;
}

.save-status,
.toolbar-sync {
  font-size: 12px;
  opacity: 0.92;
}

.toolbar-sync {
  max-width: 230px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toolbar-btn {
  border: none;
  background: transparent;
  color: #fff;
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
}

.toolbar-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.toolbar-btn-text {
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.avatar-list {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 28px;
}

.presence-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #0ea5e9;
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.ribbon-tabs {
  display: flex;
  gap: 4px;
  padding: 4px 8px;
  border-bottom: 1px solid var(--line);
  background: #f7f7f7;
}

.ribbon-tabs .tab {
  font-size: 13px;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 4px 4px 0 0;
  cursor: default;
}

.ribbon-tabs .tab.active {
  background: #fff;
  border: 1px solid var(--line);
  border-bottom: 1px solid #fff;
  margin-bottom: -1px;
}

.ribbon-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tool-divider {
  width: 1px;
  height: 24px;
  background: var(--line);
}

.tool-btn {
  border: 1px solid transparent;
  background: transparent;
  border-radius: 3px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  padding: 4px 8px;
}

.tool-btn:hover {
  border-color: #d3d3d3;
  background: #f5f5f5;
}

.tool-btn.small {
  font-size: 11px;
  padding: 2px 6px;
}

.tool-btn.icon {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-weight: 700;
  padding: 0;
}

.font-select,
.size-select {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #fff;
  font-size: 12px;
  padding: 3px 6px;
}

.font-select {
  width: 100px;
}

.size-select {
  width: 50px;
}

.hint-text {
  font-size: 11px;
  color: var(--muted);
}

.formula-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.cell-ref {
  min-width: 60px;
  border: 1px solid var(--line);
  background: #f8f8f8;
  text-align: center;
  font-family: monospace;
  font-size: 12px;
  padding: 4px 8px;
}

.fx {
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}

.formula-input {
  flex: 1;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 12px;
  padding: 4px 8px;
}

.grid-wrapper {
  overflow: auto;
  background: #e8e8e8;
}

#excelTable {
  min-width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  background: #fff;
}

#excelTable th,
#excelTable td {
  border: 1px solid #ebebeb;
  height: 24px;
  font-size: 12px;
  color: #111827;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  padding: 0 6px;
  position: relative;
  box-sizing: border-box;
}

#excelTable col {
  box-sizing: border-box;
}

#excelTable th {
  background: #f8f8f8;
  font-weight: 400;
  color: #4b5563;
  text-align: center;
  user-select: none;
}

#excelTable .corner-cell,
#excelTable .row-header {
  width: 46px;
  min-width: 46px;
  max-width: 46px;
  background: #f8f8f8;
}

#excelTable th.col-header {
  position: relative;
  overflow: visible;
  box-sizing: border-box;
}

.col-header-label {
  display: block;
  padding-right: 8px;
}

.col-resizer {
  position: absolute;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  cursor: col-resize;
  z-index: 10;
}

.col-resizer:hover {
  background: rgba(33, 115, 70, 0.5);
}

.col-resizer:active {
  background: rgba(33, 115, 70, 0.7);
}

body.is-resizing-columns,
body.is-resizing-columns * {
  cursor: col-resize !important;
  user-select: none !important;
}

#excelTable td.selected {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

#excelTable td.chat-cell {
  color: #111827;
}

#excelTable td.chat-cell.revealed {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  text-overflow: unset;
  overflow: visible;
}

#excelTable td.excel-comment-unread {
  /* Only keep the red corner indicator for unread; no background highlight. */
}

#excelTable td.excel-comment-cell::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 8px solid #22c55e;
  border-left: 8px solid transparent;
}

#excelTable td.excel-comment-unread::after {
  border-top-color: #ef4444;
}

#excelTable td.excel-comment-open {
  outline: 2px solid #f59e0b;
  outline-offset: -2px;
}

#excelTable.boss-mode td.chat-cell,
#excelTable.boss-mode td.excel-comment-cell {
  background: #fff;
}

#excelTable.boss-mode td.chat-cell.revealed,
#excelTable.boss-mode td.chat-cell.unread,
#excelTable.boss-mode td.excel-comment-unread {
  background: #fff;
}

#excelTable.boss-mode td.excel-comment-cell::after {
  display: none;
}

.excel-comment-popup {
  position: fixed;
  z-index: 1200;
  min-width: 220px;
  max-width: 320px;
  background: var(--excel-comment-bg);
  border: 1px solid var(--excel-comment-border);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.22);
  padding: 8px 10px;
  font-size: 12px;
  color: #111827;
  pointer-events: none;
}

.excel-comment-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.excel-comment-header strong {
  font-size: 12px;
}

.excel-comment-header span {
  color: #6b7280;
  font-size: 11px;
}

.excel-comment-reply {
  margin: 4px 0;
  color: #4b5563;
  border-left: 2px solid #d1d5db;
  padding-left: 6px;
}

.excel-comment-body {
  white-space: pre-wrap;
  word-break: break-word;
}

.excel-comment-reactions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.excel-comment-reaction {
  font-size: 11px;
  border: 1px solid #d1d5db;
  border-radius: 999px;
  padding: 1px 6px;
  background: #fffef2;
}

.excel-comment-footer {
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: #6b7280;
}

.excel-comment-time {
  margin-left: auto;
  color: #9ca3af;
}

.excel-comment-read {
  color: #22c55e;
  font-weight: 500;
}

.excel-comment-ephemeral {
  color: #b45309;
}

.excel-context-menu {
  position: fixed;
  z-index: 1300;
  min-width: 120px;
  background: #fff;
  border: 1px solid #d1d5db;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
  padding: 4px;
}

.excel-context-menu button {
  width: 100%;
  border: none;
  background: transparent;
  text-align: left;
  padding: 6px 8px;
  font-size: 12px;
  cursor: pointer;
  border-radius: 4px;
}

.excel-context-menu button:hover {
  background: #f3f4f6;
}

.context-reactions {
  display: flex;
  gap: 4px;
  padding: 2px 2px 4px;
}

.context-reactions button {
  flex: 1;
  width: auto;
  text-align: center;
}

.status-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding: 6px 10px;
  background: var(--status-bg);
}

.status-left,
.status-metrics {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: #4b5563;
}

.status-chip {
  padding: 2px 8px;
  border-radius: 12px;
  background: #f1f5f9;
  color: #0f172a;
  border: 1px solid #dbe3ea;
}

.status-compose {
  min-height: 34px;
  border: 1px solid #d5d9df;
  border-radius: 5px;
  background: #fff;
  display: flex;
  align-items: center;
  padding: 0 10px;
  gap: 8px;
  cursor: text;
  position: relative;
}

.status-compose.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(33, 115, 70, 0.12);
}

#statusHint {
  font-size: 12px;
  color: #6b7280;
  pointer-events: none;
}

#messageInput {
  flex: 1;
  border: none;
  font-size: 13px;
  outline: none;
  color: #111827;
  padding: 0;
}

#ephemeralSelect {
  border: 1px solid #d1d5db;
  border-radius: 4px;
  font-size: 11px;
  color: #374151;
  background: #fff;
  padding: 2px 4px;
  height: 24px;
}

#ephemeralSelect:disabled {
  opacity: 0.7;
}

.reply-row {
  position: absolute;
  left: 10px;
  right: 10px;
  top: -24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

#replyPreview {
  font-size: 11px;
  color: #4b5563;
  background: #f5f5f5;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  padding: 2px 6px;
  max-width: calc(100% - 70px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#replyCancelBtn {
  border: none;
  border-radius: 4px;
  background: #fee2e2;
  color: #b91c1c;
  font-size: 11px;
  padding: 2px 6px;
  cursor: pointer;
}

#replyCancelBtn:hover {
  background: #fecaca;
}

.sheet-tabs {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  border-top: 1px solid var(--line);
  background: #e8e8e8;
  padding: 4px 8px;
  min-height: 34px;
}

.sheet-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid #d8d8d8;
  border-bottom: 1px solid #fff;
  border-radius: 4px 4px 0 0;
  background: #fff;
  font-size: 12px;
  padding: 4px 10px;
  cursor: pointer;
}

.sheet-tab.active {
  color: var(--accent);
  font-weight: 600;
}

.sheet-tab.add-tab {
  border-style: dashed;
  padding: 4px 8px;
}

.tab-unread {
  min-width: 16px;
  height: 16px;
  border-radius: 999px;
  background: #ef4444;
  color: #fff;
  font-size: 10px;
  font-style: normal;
  display: inline-grid;
  place-items: center;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1400;
  background: rgba(0, 0, 0, 0.35);
  display: none;
  align-items: center;
  justify-content: center;
}

#dmModal:not([hidden]),
#searchModal:not([hidden]) {
  display: flex;
}

.modal-backdrop.open {
  display: flex;
}

.modal-backdrop[hidden] {
  display: none !important;
}

.modal {
  width: 360px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
  padding: 20px;
}

.modal-wide {
  width: min(560px, calc(100vw - 24px));
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.modal h2 {
  margin: 0;
  font-size: 18px;
}

.modal p {
  margin: 0 0 12px;
  font-size: 13px;
  color: #6b7280;
}

.modal input {
  width: 100%;
  height: 38px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
  padding: 0 11px;
  margin-bottom: 10px;
}

.modal input:focus {
  outline: none;
  border-color: var(--accent);
}

.modal button {
  height: 36px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

#loginSubmit {
  width: 100%;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
}

#loginSubmit:hover {
  background: var(--accent-dark);
}

#loginSubmit:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}

.modal-close {
  width: 28px;
  height: 28px;
  background: #f3f4f6;
  color: #374151;
}

.modal-close:hover {
  background: #e5e7eb;
}

.password-error {
  color: #dc2626;
  font-size: 13px;
  margin-top: 8px;
}

.dm-user-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
  max-height: 280px;
  overflow: auto;
}

.dm-user-item {
  width: 100%;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  background: #fff;
  padding: 8px;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
}

.dm-user-item:hover {
  border-color: var(--accent);
  background: #f0fdf4;
}

.dm-empty {
  color: #6b7280;
  font-size: 12px;
}

.excel-search-results {
  max-height: 300px;
  overflow: auto;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 4px;
}

.excel-search-item {
  width: 100%;
  border: none;
  background: transparent;
  border-radius: 6px;
  text-align: left;
  display: grid;
  gap: 3px;
  padding: 8px;
  cursor: pointer;
}

.excel-search-item:hover {
  background: #f3f4f6;
}

.excel-search-item strong {
  font-size: 12px;
  color: #111827;
}

.excel-search-item span {
  font-size: 12px;
  color: #4b5563;
}

.excel-search-empty {
  padding: 10px;
  color: #6b7280;
  font-size: 12px;
}

.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1500;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  max-width: 320px;
  padding: 10px 14px;
  border-radius: 6px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.16);
  font-size: 13px;
  animation: toast-slide-in 0.25s ease-out;
}

.toast-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
}

.toast-success {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #15803d;
}

.toast-fade-out {
  animation: toast-fade-out 0.25s ease-out forwards;
}

@keyframes toast-slide-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toast-fade-out {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

.new-message-btn {
  position: fixed;
  right: 16px;
  bottom: 64px;
  z-index: 1250;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(33, 115, 70, 0.28);
  background: #ffffff;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
  cursor: pointer;
}

.new-message-btn[hidden] {
  display: none;
}

.new-message-btn:hover {
  background: #f0fdf4;
}

.new-message-btn:active {
  transform: translateY(1px);
}

@media (max-width: 980px) {
  .status-bar {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .status-compose {
    order: 3;
  }

  .toolbar-sync {
    display: none;
  }
}