.right-panel {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 0;
}

.chat-header {
  display: flex;
  align-items: flex-start;
  padding: 1.05rem 1.2rem 0.95rem;
  background: rgba(255, 255, 255, 0.02);
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.05);
}

.chat-header-row {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.7rem;
  min-width: 0;
}

.message-form {
  position: relative;
  padding: 1.2rem;
}

.jump-to-bottom-button {
  position: absolute;
  left: 1.2rem;
  right: 1.2rem;
  top: 0;
  display: inline-flex;
  align-items: center;
  transform: translateY(calc(-100% - 0.4rem));
  z-index: 2;
  width: auto;
  min-height: 2.15rem;
  justify-content: center;
  padding: 0 1rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 700;
  text-align: center;
  backdrop-filter: blur(10px);
  transition:
    opacity 160ms ease,
    transform 160ms ease,
    background-color 160ms ease,
    color 160ms ease;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.05),
    0 10px 24px rgba(0, 0, 0, 0.22);
}

.jump-to-bottom-button:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.reply-preview {
  margin-bottom: 0.6rem;
  padding: 0.65rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  border-radius: var(--radius-panel);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: inset 2px 0 0 rgba(255, 255, 255, 0.08);
}

.reply-preview-copy {
  min-width: 0;
  display: grid;
  gap: 0.16rem;
}

.reply-preview-copy strong {
  font-size: 0.77rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.reply-preview-copy span {
  color: var(--text-muted);
  font-size: 0.79rem;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reply-preview-cancel {
  min-height: 1.9rem;
  padding: 0 0.7rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
  white-space: nowrap;
}

.reply-preview-cancel:hover {
  background: rgba(255, 255, 255, 0.07);
}

.attachment-tray {
  display: grid;
  gap: 0.42rem;
  margin-bottom: 0.6rem;
}

.composer-attachment-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.035);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.045);
}

.composer-attachment-chip.is-uploading {
  color: var(--text-muted);
}

.composer-attachment-chip-copy {
  min-width: 0;
  display: grid;
  gap: 0.16rem;
}

.composer-attachment-chip-copy strong {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.composer-attachment-chip-copy span {
  color: var(--text-muted);
  font-size: 0.73rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.composer-attachment-remove {
  min-height: 1.85rem;
  padding: 0 0.68rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 600;
}

.composer-attachment-remove:hover {
  background: rgba(255, 255, 255, 0.07);
}

.chat-header p {
  color: var(--text-secondary);
  line-height: 1.55;
}

.chat-header-title-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  min-width: 0;
}

.chat-header-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.6rem;
  flex: 0 1 22rem;
  min-width: 0;
}

.chat-search {
  flex: 1 1 auto;
  min-width: 0;
}

.chat-search-input {
  width: 100%;
  min-height: 2.4rem;
  padding: 0.58rem 0.78rem;
  border: 0;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text-primary);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.045);
}

.chat-search-input::placeholder {
  color: var(--text-muted);
}

.chat-search-input:focus {
  outline: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.045);
}

.chat-header-presence {
  flex: 0 0 auto;
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1;
  white-space: nowrap;
}

.message-list {
  padding: 0.7rem 1.2rem 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-y: auto;
  scrollbar-width: thin;
}

.message-list > :first-child {
  margin-top: auto;
}

.message-list-empty {
  min-height: 100%;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.35rem;
  padding: 2rem 1rem 3rem;
  text-align: center;
}

.message-list-empty strong {
  font-size: 0.98rem;
  font-weight: 700;
}

.message-list-empty span {
  color: var(--text-muted);
  font-size: 0.84rem;
}

.message-list-loading::before {
  content: "";
  width: 2.2rem;
  height: 2.2rem;
  margin-bottom: 0.5rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-top-color: rgba(255, 255, 255, 0.45);
  animation: message-loading-spin 900ms linear infinite;
}

@keyframes message-loading-spin {
  to {
    transform: rotate(360deg);
  }
}

.day-divider {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0 0.7rem;
}

.day-divider::before,
.day-divider::after {
  content: "";
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
}

.day-divider-label {
  padding: 0.26rem 0.65rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.message-group {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  padding: 0.6rem 0.9rem 0.7rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.018);
  box-shadow:
    inset 2px 0 0 rgba(255, 255, 255, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.015);
}

.message-group:hover {
  background: rgba(255, 255, 255, 0.024);
}

.message-group.is-self {
  background: rgba(255, 255, 255, 0.03);
  box-shadow:
    inset 2px 0 0 rgba(255, 255, 255, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

.message-group.is-self:hover {
  background: rgba(255, 255, 255, 0.038);
}

.message-group.is-pending .message-group-sender,
.message-group.is-pending .message-group-timestamp,
.message-item.is-pending .message-item-label {
  color: var(--text-muted);
}

.message-group-header {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  min-height: 1.3rem;
}

.message-group-sender {
  font-size: 0.92rem;
  font-weight: 700;
}

.message-group-timestamp {
  color: var(--text-muted);
  font-size: 0.74rem;
}

.message-group-body {
  display: grid;
  gap: 0.12rem;
}

.message-group-read-status {
  margin-top: 0.18rem;
  padding-left: 0.28rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.message-item {
  position: relative;
  width: 100%;
  padding: 0.22rem 0.4rem;
  border-radius: var(--radius-small);
  background: transparent;
  color: inherit;
  text-align: left;
}

.message-item::before {
  content: "";
  position: absolute;
  left: -0.3rem;
  top: 0.18rem;
  bottom: 0.18rem;
  width: 2px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0);
  opacity: 0;
}

.message-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.message-item.is-jump-highlight {
  background: rgba(255, 255, 255, 0.09);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.message-item.is-jump-highlight::before {
  animation: message-jump-marker 1100ms steps(2, end) 3;
  opacity: 1;
}

@keyframes message-jump-marker {
  0%, 100% {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
  }

  50% {
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 0 12px 0 rgba(255, 255, 255, 0.32);
  }
}

.message-item.is-pending:hover {
  background: rgba(255, 255, 255, 0.022);
}

.message-item:focus-visible {
  outline: none;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.message-item-label {
  display: block;
  width: 100%;
  color: var(--text-primary);
  line-height: 1.5;
  word-break: break-word;
  white-space: pre-wrap;
}

.message-item.is-editing {
  background: rgba(255, 255, 255, 0.042);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.055);
}

.message-item-editor {
  width: 100%;
  min-height: 2.4rem;
  padding: 0.42rem 0.5rem;
  border: 0;
  border-radius: var(--radius-small);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  line-height: 1.5;
  resize: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.message-item-editor:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.038);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.09);
}

.message-item-meta {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.2rem;
}

.message-item-edited {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.2;
}

.message-link {
  color: rgba(244, 246, 248, 0.82);
  text-decoration: underline;
  text-decoration-color: rgba(244, 246, 248, 0.48);
  text-underline-offset: 0.12em;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.message-link.is-standalone {
  display: inline;
  max-width: none;
  padding: 0;
  border-radius: 0;
  background: transparent;
  white-space: normal;
  overflow: visible;
  text-overflow: clip;
}

.message-link:hover {
  color: rgba(250, 251, 252, 0.94);
  text-decoration-color: rgba(250, 251, 252, 0.82);
}

.message-link-previews {
  margin-top: 0.5rem;
  display: grid;
  gap: 0.45rem;
}

.message-attachment {
  display: grid;
  gap: 0.45rem;
  max-width: min(34rem, 100%);
  padding: 0.55rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.035);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    var(--shadow-float);
}

.message-uploaded-attachments {
  margin-top: 0.45rem;
}

.message-search-day-group {
  display: grid;
  gap: 0.35rem;
}

.message-search-result {
  display: grid;
  gap: 0.18rem;
  padding: 0.58rem 0.78rem 0.65rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.02);
  box-shadow:
    inset 2px 0 0 rgba(255, 255, 255, 0.04),
    inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.message-search-result:hover {
  background: rgba(255, 255, 255, 0.03);
}

.message-search-result-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  min-width: 0;
}

.message-search-result-time {
  color: var(--text-muted);
  font-size: 0.74rem;
  white-space: nowrap;
}

.message-attachment-poster,
.message-attachment-frame,
.message-attachment-image,
.message-attachment-video {
  width: 100%;
  border: 0;
  border-radius: var(--radius-control);
  background: rgba(12, 14, 18, 0.88);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.message-attachment-poster {
  position: relative;
  display: block;
  padding: 0;
  cursor: pointer;
}

.message-attachment-image,
.message-attachment-video,
.message-attachment-audio,
.message-file-card {
  cursor: pointer;
}

.message-attachment-frame {
  position: relative;
  aspect-ratio: 16 / 9;
}

.message-attachment.is-audio-embed .message-attachment-frame {
  aspect-ratio: auto;
  min-height: 152px;
}

.message-attachment-iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: rgba(0, 0, 0, 0.18);
  border-radius: inherit;
}

.message-attachment-poster-image,
.message-attachment-image,
.message-attachment-video {
  display: block;
  width: 100%;
  max-height: min(24rem, 60vh);
  object-fit: contain;
}

.message-attachment-poster-image {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.message-attachment-video.is-gif-like {
  background: rgba(12, 14, 18, 0.88);
}

.message-attachment-poster-overlay {
  position: absolute;
  inset: auto 0 0;
  display: grid;
  gap: 0.16rem;
  padding: 0.85rem 0.95rem 0.82rem;
  background: linear-gradient(to top, rgba(12, 14, 18, 0.88), rgba(12, 14, 18, 0.12));
  text-align: left;
}

.message-attachment-poster-title {
  color: var(--text-primary);
  font-size: 0.86rem;
  line-height: 1.25;
}

.message-attachment-poster-action {
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 600;
}

.message-attachment.is-gif .message-attachment-image {
  object-fit: contain;
}

.message-attachment-audio {
  width: 100%;
  max-width: min(34rem, 100%);
  min-height: 3.1rem;
  filter: grayscale(1) brightness(0.92);
}

.message-file-card {
  display: grid;
  gap: 0.22rem;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.02);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.media-viewer {
  z-index: 60;
  padding: 1rem;
}

.media-viewer-panel {
  width: min(64rem, 100%);
  max-height: 100%;
  display: grid;
  gap: 0.8rem;
  padding: 0.9rem;
}

.media-viewer-content {
  min-height: 12rem;
  max-height: min(78vh, 52rem);
  display: grid;
  place-items: center;
  overflow: auto;
  border-radius: var(--radius-control);
  background: rgba(10, 12, 16, 0.92);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.media-viewer-content img,
.media-viewer-content video,
.media-viewer-content audio,
.media-viewer-content iframe {
  max-width: 100%;
}

.media-viewer-content img,
.media-viewer-content video {
  max-height: min(74vh, 48rem);
  object-fit: contain;
}

.media-viewer-content iframe {
  width: min(100%, 62rem);
  min-height: min(74vh, 48rem);
  border: 0;
}

.media-viewer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.media-viewer-link {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0;
}

.message-file-card-title {
  font-size: 0.84rem;
  line-height: 1.35;
  word-break: break-word;
}

.message-file-card-meta {
  color: var(--text-muted);
  font-size: 0.74rem;
  line-height: 1.35;
}

.message-attachment-source {
  display: inline-flex;
  align-items: center;
  width: 100%;
  min-width: 0;
  padding: 0.28rem 0.34rem 0.2rem;
  color: var(--text-muted);
  text-decoration: underline;
  text-decoration-color: rgba(244, 246, 248, 0.28);
  text-underline-offset: 0.12em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 0.78rem;
  line-height: 1.2;
}

.message-attachment-source:hover {
  color: rgba(250, 251, 252, 0.94);
  text-decoration-color: rgba(250, 251, 252, 0.58);
}

.message-link-preview {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
  align-items: stretch;
  max-width: 100%;
  padding: 0.34rem;
  overflow: hidden;
  border-radius: calc(var(--radius-control) - 1px);
  background: rgba(255, 255, 255, 0.015);
  box-shadow:
    inset 2px 0 0 rgba(255, 255, 255, 0.07),
    inset 0 0 0 1px rgba(255, 255, 255, 0.03);
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

.message-link-preview.has-image {
  grid-template-columns: minmax(7.4rem, 10rem) minmax(0, 1fr);
}

.message-link-preview:hover {
  background: rgba(255, 255, 255, 0.05);
}

.message-link-preview:focus-visible {
  outline: none;
  background: rgba(255, 255, 255, 0.052);
  box-shadow:
    inset 2px 0 0 rgba(255, 255, 255, 0.09),
    inset 0 0 0 1px rgba(255, 255, 255, 0.07);
}

.message-link-preview-media {
  width: 100%;
  min-width: 0;
  max-width: 10rem;
  align-self: start;
  border-radius: var(--radius-small);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.045);
}

.message-link-preview-image {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  max-height: 9rem;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.04);
}

.message-link-preview-copy {
  min-width: 0;
  display: grid;
  align-content: start;
  gap: 0.28rem;
  padding: 0.18rem 0.22rem 0.2rem 0;
}

.message-link-preview-site-row {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
}

.message-link-preview-icon {
  width: 0.95rem;
  height: 0.95rem;
  flex: 0 0 auto;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.06);
}

.message-link-preview-site {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-link-preview-title {
  color: var(--text-primary);
  font-size: 0.88rem;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

.message-link-preview-description {
  color: var(--text-secondary);
  font-size: 0.76rem;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

.message-item-reply {
  display: grid;
  gap: 0.06rem;
  margin-bottom: 0.32rem;
  padding: 0.46rem 0.48rem;
  border-radius: var(--radius-small);
  background: rgba(255, 255, 255, 0.035);
  box-shadow: inset 2px 0 0 rgba(255, 255, 255, 0.08);
}

.message-item-reply-sender {
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 700;
}

.message-item-reply-body {
  color: var(--text-muted);
  font-size: 0.76rem;
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.input-shell {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) auto 2.25rem;
  align-items: start;
  gap: 0.65rem;
  min-height: 3.4rem;
  padding: 0.6rem 0.65rem 0.62rem;
  border-radius: var(--radius-panel);
  background: var(--surface-input);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.035),
    var(--shadow-float);
}

.composer-icon-button {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  display: grid;
  place-items: center;
  align-self: start;
  margin-top: 0.16rem;
  border-radius: var(--radius-control);
  background: var(--button-secondary);
  color: var(--text-primary);
  flex: 0 0 auto;
}

.composer-send-button {
  background: var(--button-primary);
}

.composer-send-button:hover {
  background: var(--button-primary-hover);
}

.message-form textarea {
  width: 100%;
  min-width: 0;
  display: block;
  min-height: 1.4rem;
  max-height: 11rem;
  align-self: start;
  margin-top: 0.32rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text-primary);
  line-height: 1.38;
  overflow-y: hidden;
  overflow-x: hidden;
  scrollbar-width: none;
  outline: none;
  box-shadow: none;
}

.message-form textarea::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.message-form textarea:focus {
  outline: none;
  box-shadow: none;
}

.character-count {
  align-self: start;
  margin-top: 0.52rem;
  color: var(--text-muted);
  font-size: 0.76rem;
  white-space: nowrap;
  line-height: 1;
}

.message-meta {
  margin-top: 0.5rem;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  min-height: 1.1rem;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.79rem;
}

#typing-status {
  visibility: hidden;
  color: var(--text-muted);
}

#typing-status.has-text {
  visibility: visible;
}

@media (max-width: 860px) {
  .message-form {
    padding: 1rem;
  }

  .jump-to-bottom-button {
    left: 1rem;
    right: 1rem;
  }

  .reply-preview {
    padding: 0.58rem 0.65rem;
  }

  .input-shell {
    grid-template-columns: 2rem minmax(0, 1fr) auto 2rem;
    gap: 0.5rem;
  }

  .composer-icon-button {
    width: 2rem;
    height: 2rem;
  }

  .message-form textarea {
    margin-top: 0.28rem;
  }

  .character-count {
    margin-top: 0.44rem;
  }

  .message-link-preview.has-image {
    grid-template-columns: minmax(6.2rem, 8rem) minmax(0, 1fr);
  }

  .message-attachment-image,
  .message-attachment-video {
    max-height: min(20rem, 54vh);
  }
}

@media (max-width: 1120px) {
  .mobile-panel-toggle {
    display: inline-grid;
    min-width: 4.5rem;
    padding: 0 0.8rem;
    place-items: center;
    font-size: 0.74rem;
    font-weight: 700;
    line-height: 1;
    flex: 0 0 auto;
  }

  .chat-header {
    padding: 0.95rem 1rem 0.85rem;
  }

  .chat-header-copy {
    flex: 1 1 auto;
    min-width: 0;
  }

  .chat-header-tools {
    flex-basis: 16rem;
    gap: 0.5rem;
  }

  .message-list {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

@media (max-width: 640px) {
  .chat-header {
    padding: 0.85rem 0.85rem 0.8rem;
  }

  .chat-header-row {
    gap: 0.55rem;
    flex-wrap: wrap;
  }

  .chat-header-tools {
    width: 100%;
    flex-basis: 100%;
  }

  .chat-search-input {
    min-height: 2.2rem;
    padding: 0.52rem 0.68rem;
  }

  .message-list {
    padding: 0.55rem 0.85rem 0;
  }

  .message-group {
    padding: 0.52rem 0.65rem 0.6rem;
  }

  .message-form {
    padding: 0.85rem;
  }

  .jump-to-bottom-button {
    left: 0.85rem;
    right: 0.85rem;
    font-size: 0.72rem;
  }

  .reply-preview {
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.58rem;
  }

  .input-shell {
    grid-template-columns: 1.9rem minmax(0, 1fr) auto 1.9rem;
    gap: 0.45rem;
    min-height: 3rem;
    padding: 0.5rem 0.5rem 0.52rem;
  }

  .composer-icon-button {
    width: 1.9rem;
    height: 1.9rem;
  }

  .message-form textarea {
    font-size: 0.95rem;
    min-height: 1.35rem;
    margin-top: 0.25rem;
  }

  .character-count {
    font-size: 0.7rem;
    margin-top: 0.4rem;
  }

  .message-meta {
    margin-top: 0.4rem;
    font-size: 0.75rem;
    gap: 0.75rem;
  }

  .message-link-preview {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .message-attachment,
  .message-link-preview-media {
    max-width: 100%;
  }

  .message-attachment.is-audio-embed .message-attachment-frame {
    min-height: 132px;
  }

  .message-link-preview-image {
    max-height: 12rem;
  }

  .message-link-preview-copy {
    padding: 0.14rem 0.16rem 0.18rem;
  }
}