.chat-page .page-content {
  align-items: stretch;
}

#chat {
  flex: 1;
  overflow-y: auto;
  padding: 2em 1em 1em;
  gap: calc(var(--box-spacing) / 2);
  display: flex;
  flex-direction: column;
  background: var(--chat-bg);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

/* Custom Command Buttons */

.custom-cmd-bar {
  display: flex;
  gap: var(--badge-spacing);
  margin-left: var(--badge-spacing);
  flex-wrap: wrap;
  align-items: center;
}

.custom-cmd-bar:empty {
  display: none;
}

.custom-cmd-btn:hover {
  background: var(--f3-bg);
  border-color: var(--f3-border);
}

.custom-cmd-btn.running {
  opacity: var(--semi-transparent);
}

/* Header Menu */

.header-menu {
  position: relative;
  margin-left: auto;
}

.header-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: .5em;
  background: var(--f3-bg);
  border: var(--border-width) solid var(--f3-border);
  border-radius: var(--border-radius);
  min-width: 10em;
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header-menu-dropdown[hidden] {
  display: none;
}

.header-menu-item {
  border: none;
  border-radius: unset;
  text-align: left;
  padding: var(--menu-item-padding);
  background: none;
  white-space: nowrap;
}

.header-menu-item:not(:disabled):hover {
  background: var(--f2-bg);
  border: none;
}

.meta-bar {
  padding: var(--box-padding);
  background: var(--chat-bg);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  flex-shrink: 0;
  height: 3em;
  line-height: 1.3;
}

.msg, .tool-box {
  border-radius: var(--border-radius);
  padding: var(--box-padding);
  max-width: 80%;
}

.msg {
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.user {
  align-self: flex-end;
  background: var(--f3-bg);
  border: var(--border-width) solid var(--f3-border);
}

.msg.assistant {
  align-self: flex-start;
  background: var(--f1-bg);
  border: var(--border-width) solid var(--f1-border);
}

.msg.system-info {
  align-self: center;
  text-align: center;
  border: var(--border-width) solid var(--f2-border);
}

.msg .cursor {
  display: inline-block;
  width: .125em;
  height: 1em;
  background: var(--text);
  animation: blink 0.8s infinite;
  vertical-align: text-bottom;
  margin-left: .125em;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.tool-box {
  align-self: flex-start;
  background: var(--f1-bg);
  border: var(--border-width) solid var(--f1-border);
}

.tool-box > * {
  overflow-x: auto;
}

.tool-box:has(.tool-box-header) {
  padding: 0;
}

.tool-box:has([hidden]) {
  opacity: var(--semi-transparent);
}

.tool-box-header {
  display: flex;
  align-items: center;
  gap: var(--box-spacing);
  padding: var(--box-padding);
  flex-wrap: wrap;
}

.tool-error-badge {
  color: var(--dangerous);
  border: var(--border-width) solid var(--dangerous);
  padding: var(--badge-padding);
}

/* Diff View */

.tool-diff {
  max-height: 16.5em;
  overflow: auto;
}

.diff-line {
  display: flex;
  align-items: flex-start;
  white-space: pre;
}

.diff-removed {
  color: #f33;
  background: #f331
}

.diff-added {
  color: #3f3;
  background-color: #3f31;
}

.diff-marker {
  flex-shrink: 0;
  width: 1.5em;
  text-align: center;
  user-select: none;
  border-right: var(--border-width) solid var(--f2-border);
  margin-right: .5em;
}

.diff-content {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: .5em;
}

.tool-result {
  white-space: pre-wrap;
  word-break: break-word;
  padding: var(--box-padding);
  max-height: 16.5em;
  overflow: auto;
}

.tool-write-meta {
  opacity: var(--semi-transparent);
  margin-left: auto;
}

/* Chain Meta Badges */

.chain-meta {
  align-self: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--badge-spacing);
  justify-content: center;
  font-size: .8em;
  filter: sepia(1) saturate(1) hue-rotate(-45deg);
  padding: 0 0 var(--badge-spacing);
}

.chain-meta-badge {
  padding: var(--badge-padding);
  background: var(--f3-bg);
  border: var(--border-width) solid var(--f3-border);
  border-radius: var(--border-radius);
  white-space: nowrap;
}

.input-area {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  margin: var(--badge-spacing) var(--badge-spacing) var(--page-spacing);
  gap: var(--badge-spacing);
}

.input-area button {
  width: 2em;
  aspect-ratio: 1;
  padding: 0;
  line-height: 1;
  overflow: hidden;
}

.input-area textarea {
  flex: 1;
  min-height: 0;
  height: 33px;
  overflow: hidden;
}

.archive-container {
  display: flex;
  flex-direction: column;
  gap: var(--box-spacing);
}

.archived {
  opacity: var(--semi-transparent);
}

.archive-load-btn {
  display: block;
  margin-inline: auto;
}

/* Workspace Refs */

.ref-preview {
  flex-wrap: wrap;
  padding: var(--box-padding);
  padding-bottom: 0;
  gap: var(--badge-spacing);
}

.ref-preview:not([hidden]) {
  display: flex;
}

.ref-preview-item {
  display: flex;
  align-items: center;
  padding: var(--badge-padding);
  gap: var(--badge-spacing);
  background: var(--f2-bg);
  border: var(--border-width) solid var(--f2-border);
  border-radius: var(--border-radius);
}

.ref-icon {
  flex-shrink: 0;
}

.ref-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* File Upload */

.file-preview {
  flex-direction: column;
  gap: var(--box-spacing);
  padding: var(--box-padding);
}

.file-preview:not([hidden]) {
  display: flex;
}

.file-preview-inner {
  display: flex;
  align-items: center;
  gap: var(--box-spacing);
}

.file-thumb {
  max-height: 60px;
  max-width: 100px;
  object-fit: contain;
  border: var(--border-width) solid var(--f2-border);
}

.file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-remove {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  opacity: var(--semi-transparent);
  padding: 0;
  line-height: 1;
}

.file-remove:hover {
  opacity: 1;
}

/* File Ref Chips in User-Bubbles */

.file-ref-chip {
  display: inline-flex;
  align-items: center;
  gap: .3em;
  padding: .15em .5em;
  background: var(--f2-bg);
  border: var(--border-width) solid var(--f2-border);
  border-radius: var(--border-radius);
  font-size: .9em;
  white-space: nowrap;
  vertical-align: baseline;
  transition: background .15s, border-color .15s;
}

.file-ref-chip:hover {
  border-color: var(--f3-border);
  background: var(--f3-bg);
}

/* Attachments in History */

.attachment-indicator {
  margin-top: var(--badge-spacing);
  opacity: var(--semi-transparent);
}

.attachment-indicator:hover {
  opacity: 1;
}

.attachment-container {
  margin-top: var(--badge-spacing);
  display: flex;
  flex-wrap: wrap;
  gap: var(--badge-spacing);
}

.attachment-image {
  max-width: 300px;
  max-height: 200px;
  object-fit: contain;
  border: var(--border-width) solid var(--f2-border);
  cursor: pointer;
}

.attachment-file {
  display: inline-block;
  padding: var(--badge-padding);
  background: var(--f2-bg);
  border: var(--border-width) solid var(--f2-border);
  text-decoration: none;
  color: var(--text);
}

/* System-Prompt Modal */

.sp-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.sp-modal {
  background: var(--f2-bg);
  border: var(--border-width) solid var(--f2-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  width: 90vw;
  max-width: 700px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

.sp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--box-padding);
  border-bottom: var(--border-width) solid var(--f1-border);
  background: var(--f1-bg);
  flex-shrink: 0;
}

.sp-close {
  width: 2em;
  aspect-ratio: 1;
  padding: 0;
  line-height: 1;
}

.sp-body {
  padding: var(--page-padding);
  overflow-y: auto;
  flex: 1;
}

.sp-loading {
  text-align: center;
  opacity: var(--semi-transparent);
  padding: 2em;
}