.folder-list {
  display: grid;
  gap: 1px;
  overflow: auto;
}

.folder-button {
  min-height: 29px;
  width: 100%;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  align-items: center;
  gap: 5px;
  padding: 3px 6px 3px calc(6px + (var(--folder-depth, 0) * 12px));
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--muted);
  text-align: left;
}

.folder-button svg {
  width: 15px;
  height: 15px;
}

.folder-button .folder-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-button:hover {
  color: var(--text);
  background: var(--hover);
}

.folder-button.active {
  color: var(--text);
  background: var(--selected);
  border-color: var(--line);
}

.folder-count {
  min-width: 20px;
  text-align: right;
  color: var(--subtle);
  font: 10px var(--font-mono);
}

.folder-count.unread {
  color: var(--accent);
  font-weight: 700;
}

.message-pane {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.pane-toolbar {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 9px;
  border-bottom: 1px solid var(--line);
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.pane-title>div {
  display: grid;
  min-width: 0;
}

.pane-title strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.pane-title span {
  color: var(--subtle);
  font-size: 10px;
}

.toolbar-actions,
.reader-toolbar {
  display: flex;
  align-items: center;
  gap: 3px;
}

.message-list {
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.message-row {
  width: 100%;
  min-height: var(--row-height);
  display: grid;
  grid-template-columns: 19px minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  column-gap: 8px;
  row-gap: 2px;
  align-content: center;
  padding: 7px 9px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  text-align: left;
}

.message-row:hover {
  background: var(--hover);
}

.message-row.active {
  background: var(--selected);
}

.message-row.unread .message-from,
.message-row.unread .message-subject {
  font-weight: 730;
}

.message-state {
  grid-row: 1 / 3;
  align-self: center;
  width: 8px;
  height: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.message-row.unread .message-state {
  background: var(--accent);
  border-color: var(--accent);
}

.message-main {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 8px;
}

.message-from,
.message-subject,
.message-snippet {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-from {
  font-size: 11px;
}

.message-date {
  color: var(--subtle);
  font: 9px var(--font-mono);
  white-space: nowrap;
}

.message-subject-line {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.message-subject {
  font-size: 11px;
}

.message-snippet {
  color: var(--muted);
  font-size: 10px;
}

.message-icons {
  display: inline-flex;
  gap: 3px;
  color: var(--subtle);
}

.message-icons svg {
  width: 12px;
  height: 12px;
}

.load-more {
  margin: 7px;
}

.reader-pane {
  position: relative;
  overflow: hidden;
  background: var(--panel-2);
}

.reader-empty {
  height: 100%;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 7px;
  color: var(--muted);
}

.reader-empty svg {
  width: 34px;
  height: 34px;
  color: var(--line-strong);
}

.reader-empty strong {
  color: var(--text);
  font-size: 13px;
}

.reader-empty span {
  font-size: 11px;
}

.reader-content {
  height: 100%;
  overflow: auto;
  background: var(--panel);
}

.reader-toolbar {
  position: sticky;
  top: 0;
  z-index: 4;
  min-height: 42px;
  padding: 5px 10px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.reader-toolbar .button {
  min-height: 29px;
}

.reader-toolbar .button svg {
  width: 15px;
  height: 15px;
}

.toolbar-spacer {
  flex: 1;
}

.move-control select {
  width: 118px;
  height: 29px;
  min-height: 29px;
  padding-top: 3px;
  padding-bottom: 3px;
}

.message-header {
  padding: 20px 22px 14px;
  border-bottom: 1px solid var(--line);
}

.message-header h1 {
  margin: 0 0 15px;
  font-size: 20px;
  line-height: 1.25;
  font-weight: 620;
  letter-spacing: -.25px;
  overflow-wrap: anywhere;
}

.message-meta {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
}

.avatar {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--panel-2);
  color: var(--muted);
  font-weight: 700;
}

.sender {
  display: grid;
  min-width: 0;
}

.sender strong,
.sender span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sender strong {
  font-size: 12px;
}

.sender-line {
  display: flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
}

.sender-line #reader-from {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.address-contact-button {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--muted);
  font-size: 10px;
}

.address-contact-button:hover,
.address-contact-button:focus-visible {
  background: var(--hover);
  color: var(--text);
}

.address-contact-button svg {
  width: 13px;
  height: 13px;
}

.reader-recipients {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.recipient-line {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
  color: var(--muted);
  font-size: 10px;
}

.recipient-line>span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.recipient-line .address-contact-button {
  width: 21px;
  height: 21px;
  grid-template-columns: 12px 5px;
}

.sender span,
.message-meta time {
  color: var(--muted);
  font-size: 10px;
}

.thread-section {
  padding: 9px 22px;
  border-bottom: 1px solid var(--line);
}

.thread-list {
  display: grid;
  gap: 1px;
}

.thread-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  padding: 6px 7px;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--muted);
  text-align: left;
}

.thread-item:hover {
  background: var(--hover);
  color: var(--text);
}

.thread-item.current {
  background: var(--selected);
  color: var(--text);
}

.thread-item span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.thread-item time {
  font: 9px var(--font-mono);
  color: var(--subtle);
}

.attachment-list {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 10px 22px;
  border-bottom: 1px solid var(--line);
}

.attachment-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--panel-2);
  color: var(--text);
  padding: 5px 8px;
  font-size: 10px;
}

.attachment-button svg {
  width: 13px;
  height: 13px;
}

.attachment-download-all {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--muted);
  padding: 5px 8px;
  font-size: 10px;
}

.attachment-download-all:hover {
  color: var(--text);
  background: var(--hover);
  border-color: var(--accent);
}

.attachment-download-all svg {
  width: 13px;
  height: 13px;
}

.message-body {
  min-height: 260px;
  background: var(--panel);
}

.message-body iframe {
  display: block;
  width: 100%;
  min-height: 68vh;
  border: 0;
  background: #fff;
}

.message-body pre {
  margin: 0;
  padding: 22px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 13px/1.58 var(--font-sans);
  color: var(--text);
}

.empty-list {
  padding: 30px 18px;
  color: var(--muted);
  text-align: center;
  font-size: 11px;
}

.bulk-toolbar {
  position: fixed;
  z-index: 72;
  top: calc(var(--appbar-height, 44px) + 58px);
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: min(900px, calc(100vw - 24px));
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 5px;
  padding: 6px;
  border: 1px solid var(--line-strong);
  border-radius: calc(var(--radius-panel) + 4px);
  background: color-mix(in srgb, var(--panel-3) 94%, transparent);
  box-shadow: 0 12px 34px var(--shadow);
  backdrop-filter: blur(10px);
}

.bulk-toolbar.hidden {
  display: none;
}

.bulk-toolbar .toolbar-spacer {
  display: none;
}

.bulk-toolbar .button {
  min-height: 28px;
  padding: 4px 8px;
}

.bulk-toolbar .move-control select {
  width: 126px;
}

.bulk-select {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  white-space: nowrap;
}

.message-row {
  grid-template-columns: 19px minmax(0, 1fr) auto;
  cursor: default;
}

.message-select {
  display: none;
  grid-row: 1 / 3;
  align-self: center;
  margin: 0;
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
}

.message-state {
  grid-column: 1;
}

.message-main {
  grid-column: 2;
}

.message-subject-line {
  grid-column: 2;
}

.message-icons {
  grid-column: 3;
}

.message-list.selection-mode .message-row {
  grid-template-columns: 18px 19px minmax(0, 1fr) auto;
  cursor: pointer;
}

.message-list.selection-mode .message-select {
  display: block;
  grid-column: 1;
}

.message-list.selection-mode .message-state {
  grid-column: 2;
}

.message-list.selection-mode .message-main {
  grid-column: 3;
}

.message-list.selection-mode .message-subject-line {
  grid-column: 3;
}

.message-list.selection-mode .message-icons {
  grid-column: 4;
}

.message-row.selected {
  background: color-mix(in srgb, var(--accent) 14%, var(--panel));
}

#select-mode-btn.active {
  color: var(--accent);
  background: var(--selected);
  border-color: var(--line);
}

.label-heading {
  margin-top: 10px;
}

.tag-list {
  max-height: 150px;
  overflow: auto;
}

.tag-item {
  width: 100%;
  min-height: 29px;
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  padding: 4px 7px;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--muted);
  text-align: left;
}

.tag-item:hover,
.tag-item.active {
  background: var(--hover);
  color: var(--text);
}

.tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tag-color);
}

.tag-count {
  font-size: 10px;
  color: var(--muted);
}

.message-tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-left: 5px;
  vertical-align: middle;
}

.message-tag {
  display: inline-flex;
  align-items: center;
  min-height: 15px;
  max-width: 120px;
  padding: 0 5px;
  border: 1px solid color-mix(in srgb, var(--tag-color) 48%, var(--line));
  border-radius: 999px;
  background: color-mix(in srgb, var(--tag-color) 10%, transparent);
  color: var(--text);
  font-size: 9px;
  line-height: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.folder-button.drop-target {
  outline: 1px solid var(--accent);
  outline-offset: -1px;
  background: var(--selected);
}

.message-row.dragging {
  opacity: .5;
}

.remote-image-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 18px 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 12px;
}

.remote-image-bar .button {
  margin-left: auto;
}

.source-card {
  width: min(1040px, calc(100vw - 28px));
  height: min(82vh, 860px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.message-source-content {
  margin: 0;
  padding: 14px;
  overflow: auto;
  white-space: pre;
  tab-size: 4;
  font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--panel-2);
  color: var(--text);
  border-block: 1px solid var(--line);
}

.attachment-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.attachment-item .attachment-button {
  min-width: 0;
}

/* Reader toolbars must remain usable at every UI scale. */
.reader-toolbar {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  flex-wrap: nowrap;
}

.reader-toolbar>*,
.bulk-toolbar>* {
  flex: 0 0 auto;
}

#spam-btn.active {
  color: var(--warning);
  background: color-mix(in srgb, var(--warning) 10%, transparent);
  border-color: color-mix(in srgb, var(--warning) 35%, var(--line));
}

.message-icons {
  align-items: center;
  min-width: 40px;
  justify-content: flex-end;
}

.message-static-icon {
  display: inline-grid;
  place-items: center;
  color: var(--subtle);
}

.message-quick-actions {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  opacity: 0;
  pointer-events: none;
}

.message-row:hover .message-quick-actions,
.message-row:focus-within .message-quick-actions,
.message-row.selected .message-quick-actions {
  opacity: 1;
  pointer-events: auto;
}

.message-quick-action {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--muted);
}

.message-quick-action:hover {
  background: var(--hover);
  color: var(--text);
}

.message-quick-action.active {
  color: var(--warning);
}

.message-quick-action svg {
  width: 12px;
  height: 12px;
}

@media (hover:none) {
  .message-quick-actions {
    opacity: 1;
    pointer-events: auto;
  }
}

/* Hierarchical folder tree. The disclosure control is separate from the folder action. */
.folder-row {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: center;
  padding-left: calc(var(--folder-depth, 0) * 12px);
  min-width: 0;
}

.folder-expander {
  width: 18px;
  height: 28px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--subtle);
}

.folder-expander:hover,
.folder-expander:focus-visible {
  color: var(--text);
  background: var(--hover);
}

.folder-expander svg {
  width: 13px;
  height: 13px;
  transition: transform .12s ease;
}

.folder-expander.expanded svg {
  transform: rotate(90deg);
}

.folder-expander.placeholder {
  visibility: hidden;
  pointer-events: none;
}

.folder-row .folder-button {
  padding-left: 4px;
}

html[data-reduce-motion="true"] .folder-expander svg {
  transition: none;
}

#reader-from[role="button"] {
  cursor: pointer;
  border-radius: var(--radius-control);
  outline-offset: 3px;
}

#reader-from[role="button"]:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

#reader-from[role="button"]:focus-visible {
  outline: 1px solid var(--accent);
}

.list-sort-control select {
  width: auto;
  max-width: 132px;
  min-height: 28px;
  height: 28px;
  padding: 2px 24px 2px 7px;
  font-size: 10px;
}

#thread-toggle svg {
  transition: transform .12s ease;
}

#thread-toggle.expanded svg {
  transform: rotate(90deg);
}

html[data-reduce-motion="true"] #thread-toggle svg {
  transition: none;
}


.attachment-preview-dialog {
  width: min(1040px, calc(100vw - 28px));
  max-width: none;
}

.attachment-preview-card {
  height: min(84vh, 880px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.attachment-preview-body {
  min-height: 0;
  overflow: auto;
  display: grid;
  place-items: center;
  background: var(--field);
}

.attachment-preview-body img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.attachment-preview-body iframe {
  width: 100%;
  height: 100%;
  min-height: 420px;
  border: 0;
  background: #fff;
}

.attachment-preview-body pre {
  align-self: stretch;
  justify-self: stretch;
  margin: 0;
  padding: 16px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 12px/1.5 var(--font-mono);
  color: var(--text);
}

/* A flagged message stays visually quiet while remaining easy to scan. */
.message-row.flagged {
  box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--danger) 58%, transparent);
}

.search-highlight {
  background: var(--selected);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}

/* Advanced appearance preferences. */
.folder-pane {
  background: var(--folder-bg);
}

.folder-button,
.tag-item {
  min-height: var(--sidebar-item-height);
}

.message-pane,
.message-row {
  background: var(--message-bg);
}

.reader-content,
.message-body {
  background: var(--reader-bg);
}

.message-row.unread .message-from,
.message-row.unread .message-subject {
  font-weight: var(--unread-font-weight);
}

.message-header,
.thread-section,
.attachment-list,
.remote-image-bar,
.message-body {
  width: 100%;
  max-width: var(--reader-max-width);
  margin-inline: auto;
}

html[data-unread-badge="outline"] .message-row.unread .message-state {
  background: transparent;
  border: 2px solid var(--accent);
}

html[data-unread-badge="solid"] .message-row.unread .message-state {
  width: 12px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  border-color: var(--accent);
}

html[data-compact-headers="true"] .message-header {
  padding-block: 10px 8px;
}

html[data-compact-headers="true"] .message-header h1 {
  margin-bottom: 8px;
  font-size: 17px;
}

html[data-compact-headers="true"] .message-meta {
  grid-template-columns: 26px minmax(0, 1fr) auto;
}

html[data-compact-headers="true"] .message-meta .avatar {
  width: 26px;
  height: 26px;
}

html[data-toolbar-density="compact"] .pane-toolbar,
html[data-toolbar-density="compact"] .reader-toolbar {
  min-height: calc(36px * var(--ui-scale-factor));
  padding-block: 3px;
}

html[data-toolbar-density="spacious"] .pane-toolbar,
html[data-toolbar-density="spacious"] .reader-toolbar {
  min-height: calc(52px * var(--ui-scale-factor));
  padding-block: 8px;
}


/* Pane-aware anti-collision rules. These react to the pane width, not only viewport width. */
@container reader-pane (max-width: 640px) {
  .reader-toolbar {
    gap: 1px;
    padding-inline: 6px;
  }

  .reader-toolbar .button span {
    display: none;
  }

  .reader-toolbar .button {
    padding-inline: 6px;
  }
}

@container reader-pane (max-width: 460px) {
  .reader-toolbar {
    scrollbar-width: none;
  }

  .reader-toolbar::-webkit-scrollbar {
    display: none;
  }
}

@media (max-width: 560px) {
  .bulk-toolbar {
    top: auto;
    bottom: 10px;
    width: calc(100vw - 20px);
    max-width: none;
  }

  .bulk-toolbar .move-control {
    display: block;
  }

  .bulk-toolbar .move-control select {
    width: 116px;
  }
}

@media (max-width: 820px) {
  .folder-row {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  .folder-expander {
    width: 32px;
    height: 34px;
  }

  .folder-expander svg {
    width: 15px;
    height: 15px;
  }

  .folder-row .folder-button {
    min-height: 34px;
  }

  .message-meta {
    align-items: start;
  }
}

.attachment-preview-body video {
  width: 100%;
  height: 100%;
  max-height: 72dvh;
  background: #000;
}

.toolbar-menu {
  position: relative;
  flex: 0 0 auto;
}

.toolbar-menu>summary {
  list-style: none;
  user-select: none;
  white-space: nowrap;
}

.toolbar-menu>summary::-webkit-details-marker {
  display: none;
}

.toolbar-menu>summary::after {
  content: "▾";
  margin-left: 3px;
  color: var(--subtle);
  font-size: 9px;
}

.toolbar-menu[open]>summary {
  border-color: var(--accent);
  background: var(--selected);
}

.toolbar-menu-popover {
  position: fixed;
  z-index: 160;
  top: 0;
  left: 0;
  min-width: 164px;
  padding: 4px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--panel);
  box-shadow: 0 10px 28px var(--shadow);
}

.toolbar-menu-popover button {
  width: 100%;
  min-height: 30px;
  display: block;
  padding: 6px 8px;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--text);
  text-align: left;
  white-space: nowrap;
}

.toolbar-menu-popover button:hover,
.toolbar-menu-popover button:focus-visible {
  background: var(--hover);
}

#message-transfer-menu .toolbar-menu-popover {
  left: auto;
  right: 0;
}