*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  height: 100%;
}

body.app-layout {
  display: grid;
  grid-template-columns: var(--layout-rail-width) var(--layout-sidebar-width) minmax(0, 1fr) var(--layout-details-width);
  grid-template-rows: minmax(0, 1fr);
  min-height: 0;
  overflow: hidden;
  background: var(--color-bg-main);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.icon-rail {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  min-width: 0;
  padding: var(--space-sm) 0;
  background: var(--color-bg-rail);
  border-inline-end: var(--space-3xs) solid var(--color-border-subtle);
  overflow-y: auto;
}

.rail-top,
.rail-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.rail-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--layout-rail-width);
  aspect-ratio: 1 / 1;
  border: none;
  border-radius: var(--radius-lg);
  background: none;
  color: var(--color-text-muted);
  font-size: var(--font-size-xl);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.rail-btn:hover {
  background: var(--color-bg-card-hover);
  color: var(--color-text-primary);
}

.rail-btn:active {
  background: var(--color-bg-card-active);
}

.rail-btn-active {
  background: var(--color-primary-light);
  color: var(--color-text-link);
}

.rail-btn-profile {
  border-radius: var(--radius-full);
  background: var(--color-avatar-user-bg);
  color: var(--color-avatar-user-text);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
}

.sidebar {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--color-bg-sidebar);
  border-inline-end: var(--space-3xs) solid var(--color-border-subtle);
}

.sidebar-header {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-base);
  padding: var(--space-base);
  border-bottom: var(--space-3xs) solid var(--color-border-subtle);
}

.team-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  min-width: 0;
}

.team-title {
  margin: 0;
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

.team-meta {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.search-box {
  min-width: 0;
}

.search-input {
  width: 100%;
  height: var(--layout-input-min-height);
  padding: 0 var(--space-base);
  border: var(--space-3xs) solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-bg-input);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

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

.search-input:hover {
  border-color: var(--color-border-strong);
}

.search-input:focus {
  border-color: var(--color-border-focus);
  background: var(--color-bg-input-focus);
  box-shadow: var(--shadow-focus);
}

.room-nav-scroll {
  flex: 1;
  min-height: 0;
  padding: var(--space-sm);
  overflow-y: auto;
}

.room-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin: 0;
  padding: 0;
  list-style: none;
}

.room-item {
  list-style: none;
}

.room-link {
  display: flex;
  align-items: center;
  gap: var(--space-base);
  width: 100%;
  min-width: 0;
  padding: var(--space-base);
  border: none;
  border-radius: var(--radius-md);
  background: none;
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-snug);
  text-align: left;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.room-link:hover {
  background: var(--color-bg-card-hover);
  color: var(--color-text-primary);
}

.room-link:active {
  background: var(--color-bg-card-active);
}

.room-item[data-active="true"] .room-link {
  background: var(--color-bg-card-active);
  color: var(--color-text-primary);
}

.room-item[data-active="true"] .room-prefix {
  color: var(--color-text-link);
}

.room-prefix {
  flex-shrink: 0;
  color: var(--color-text-muted);
  font-weight: var(--font-weight-semibold);
}

.room-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge-unread {
  flex-shrink: 0;
  margin-inline-start: auto;
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-full);
  background: var(--color-badge-danger-bg);
  color: var(--color-badge-danger-text);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

.room-empty-state {
  margin: var(--space-base);
  padding: var(--space-xl);
  border: var(--space-3xs) dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-align: center;
}

.chat-main {
  grid-column: 3;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--color-bg-main);
}

.main-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-base);
  height: var(--layout-header-height);
  padding: 0 var(--space-lg);
  border-bottom: var(--space-3xs) solid var(--color-border-subtle);
  background: var(--color-bg-main);
}

.header-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-3xs);
  min-width: 0;
}

.room-heading {
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-primary);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

.room-topic {
  display: flex;
  gap: var(--space-sm);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.header-actions {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  .btn-secondary {
    display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: var(--layout-input-min-height);
  padding: 0 var(--space-base);
  border: var(--space-3xs) solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-focus);
}

.btn-secondary:active {
  background: var(--color-bg-card-active);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--layout-input-min-height);
  height: var(--layout-input-min-height);
  padding: 0;
  border: var(--space-3xs) solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn-icon:hover {
  background: var(--color-bg-card-hover);
  color: var(--color-text-primary);
}

.btn-icon:active {
  background: var(--color-bg-card-active);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: var(--space-3xs) solid var(--color-focus-ring);
  outline-offset: var(--space-2xs);
  box-shadow: var(--shadow-focus);
}

.subbar-room-code {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-base);
  height: var(--layout-subbar-height);
  min-width: 0;
  padding: 0 var(--space-lg);
  border-bottom: var(--space-3xs) solid var(--color-border-subtle);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.chip-label {
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.room-code-chip {
  flex-shrink: 0;
  padding: var(--space-2xs) var(--space-sm);
  border: var(--space-3xs) solid var(--color-border-default);
  border-radius: var(--radius-sm);
  background: var(--color-bg-code);
  color: var(--color-text-link);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.btn-copy-chip {
  flex-shrink: 0;
  padding: var(--space-2xs) var(--space-sm);
  border: none;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text-link);
  font-size: var(--font-size-sm);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn-copy-chip:hover {
  background: var(--color-primary-light);
}

.subbar-note {
  flex: 1;
  min-width: 0;
  margin-inline-start: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-muted);
  text-align: right;
}

.messages-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-height: 0;
  padding: var(--space-lg);
  overflow-y: auto;
  background: var(--color-bg-main);
}

.thread-skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--space-base);
  padding: var(--space-base) 0;
}

.skeleton-msg {
  height: var(--layout-input-min-height);
  border-radius: var(--radius-md);
  background: linear-gradient(
    90deg,
    var(--color-skeleton-base) 25%,
    var(--color-skeleton-shine) 50%,
    var(--color-skeleton-base) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer var(--transition-normal) infinite;
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

.thread-empty-state {
  margin: var(--space-xl) auto;
  padding: var(--space-2xl);
  border: var(--space-3xs) dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  font-size: var(--font-size-md);
  text-align: center;
}

.message-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.chat-message {
  display: flex;
  align-items: flex-start;
  gap: var(--space-base);
  min-width: 0;
}

.message-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: var(--layout-input-min-height);
  height: var(--layout-input-min-height);
  border-radius: var(--radius-full);
  background: var(--color-avatar-ik-bg);
  color: var(--color-avatar-ik-text);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  user-select: none;
}

.avatar-agent {
  background: var(--color-avatar-ai-bg);
  color: var(--color-avatar-ai-text);
}

.message-mine .message-avatar {
  background: var(--color-avatar-user-bg);
  color: var(--color-avatar-user-text);
}

.message-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-xs);
  min-width: 0;
}

.message-meta {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-sm);
  min-width: 0;
}

.message-author {
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
}

.badge-role {
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-full);
  background: var(--color-badge-subtle-bg);
  color: var(--color-badge-subtle-text);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-tight);
}

.badge-agent {
  background: var(--color-badge-info-bg);
  color: var(--color-badge-info-text);
}

.message-time {
  flex-shrink: 0;
  margin-inline-start: auto;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.message-text {
  min-width: 0;
  padding: var(--space-base) var(--space-lg);
  border: var(--space-3xs) solid var(--color-bubble-other-border);
  border-radius: var(--radius-lg);
  background: var(--color-bubble-other-bg);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.message-text p {
  margin: 0;
}

.message-mine .message-text {
  border: none;
  background: var(--color-bubble-self-bg);
  color: var(--color-bubble-self-text);
}

.code-card {
  margin-top: var(--space-sm);
  min-width: 0;
  overflow: hidden;
  border: var(--space-3xs) solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-bg-code);
}

.code-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-base);
  border-bottom: var(--space-3xs) solid var(--color-border-subtle);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

.code-filename {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.btn-copy-code {
  flex-shrink: 0;
  padding: var(--space-2xs) var(--space-sm);
  border: none;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text-link);
  font-size: var(--font-size-xs);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn-copy-code:hover {
  background: var(--color-primary-light);
}

.code-card pre {
  margin: 0;
  padding: var(--space-base);
  overflow-x: auto;
  background: var(--color-bg-code);
}

.code-card pre code {
  display: block;
  padding: 0;
  border: none;
  background: none;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  white-space: pre;
  overflow-wrap: normal;
  word-break: normal;
}

.system-message {
  display: flex;
  justify-content: center;
  padding: var(--space-sm) 0;
}

.system-msg-text {
  padding: var(--space-2xs) var(--space-base);
  border: var(--space-3xs) solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  text-align: center;
}

.composer-section {
  flex-shrink: 0;
  position: sticky;
  bottom: 0;
  z-index: var(--z-header);
  padding: var(--space-base) var(--space-lg);
  border-top: var(--space-3xs) solid var(--color-border-subtle);
  background: var(--color-bg-main);
}

.composer-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin: 0;
}

.composer-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  min-width: 0;
  padding: var(--space-sm);
  border: var(--space-3xs) solid var(--color-border-default);
  border-radius: var(--radius-lg);
  background: var(--color-bg-input);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.composer-input-wrapper:hover {
  border-color: var(--color-border-strong);
}

.composer-input-wrapper:focus-within {
  border-color: var(--color-border-focus);
  background: var(--color-bg-input-focus);
  box-shadow: var(--shadow-focus);
}

.composer-textarea {
  flex: 1;
  min-height: var(--layout-input-min-height);
  max-height: calc(var(--layout-input-min-height) * 3);
  margin: 0;
  padding: 0;
  border: none;
  outline: none;
  background: none;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  resize: none;
  overflow-y: auto;
}

.composer-textarea::placeholder {
  color: var(--color-text-muted);
}

.composer-textarea:focus-visible {
  outline: none;
  box-shadow: none;
}

.composer-actions {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: var(--layout-input-min-height);
  height: var(--layout-input-min-height);
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-primary-base);
  color: var(--color-bubble-self-text);
  font-size: var(--font-size-lg);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn-send:hover {
  background: var(--color-primary-hover);
}

.btn-send:active {
  background: var(--color-primary-active);
}

.btn-send:disabled {
  background: var(--color-bg-card);
  color: var(--color-text-dimmed);
  cursor: not-allowed;
  box-shadow: none;
}

.composer-hint-line {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  text-align: center;
}

.details-panel {
  grid-column: 4;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  border-inline-start: var(--space-3xs) solid var(--color-border-subtle);
  background: var(--color-bg-panel);
}

.details-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-base);
  height: var(--layout-header-height);
  padding: 0 var(--space-lg);
  border-bottom: var(--space-3xs) solid var(--color-border-subtle);
}

.details-title {
  margin: 0;
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.details-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  min-height: 0;
  padding: var(--space-lg);
  overflow-y: auto;
}

.details-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-width: 0;
}

.section-title {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.section-text {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

.members-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin: 0;
  padding: 0;
  list-style: none;
}

.member-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-base);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  transition: background-color var(--transition-fast);
}

.member-item:hover {
  background: var(--color-bg-card-hover);
}

.member-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: var(--font-weight-medium);
}

.messages-container,
.room-nav-scroll,
.details-content,
.composer-textarea,
.code-card pre {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) var(--color-bg-main);
}

.messages-container::-webkit-scrollbar,
.room-nav-scroll::-webkit-scrollbar,
.details-content::-webkit-scrollbar,
.composer-textarea::-webkit-scrollbar,
.code-card pre::-webkit-scrollbar {
  width: var(--space-sm);
  height: var(--space-sm);
}

.messages-container::-webkit-scrollbar-thumb,
.room-nav-scroll::-webkit-scrollbar-thumb,
.details-content::-webkit-scrollbar-thumb,
.composer-textarea::-webkit-scrollbar-thumb,
.code-card pre::-webkit-scrollbar-thumb {
  border-radius: var(--radius-full);
  background: var(--color-border-strong);
}

.messages-container::-webkit-scrollbar-thumb:hover,
.room-nav-scroll::-webkit-scrollbar-thumb:hover,
.details-content::-webkit-scrollbar-thumb:hover,
.composer-textarea::-webkit-scrollbar-thumb:hover,
.code-card pre::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-focus);
}

.messages-container::-webkit-scrollbar-track,
.room-nav-scroll::-webkit-scrollbar-track,
.details-content::-webkit-scrollbar-track,
.composer-textarea::-webkit-scrollbar-track,
.code-card pre::-webkit-scrollbar-track {
  background: var(--color-bg-main);
}

@media (max-width: 1024px) { /* var(--layout-breakpoint-tablet) */
  body.app-layout {
    grid-template-columns: var(--layout-rail-width) var(--layout-sidebar-width) minmax(0, 1fr);
  }

  .details-panel {
    grid-column: auto;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    width: var(--layout-drawer-width);
    max-width: 100%;
    transform: translateX(100%);
    transition:
      transform var(--transition-normal),
      box-shadow var(--transition-normal);
    z-index: var(--z-drawer);
  }

  .details-panel.is-open,
  body.details-open .details-panel {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  body.details-open::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: var(--z-header);
    background: var(--color-bg-overlay);
  }
}

@media (max-width: 720px) { /* var(--layout-breakpoint-mobile) */
  body.app-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .chat-main {
    grid-column: 1;
  }

  .icon-rail,
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: var(--z-drawer);
    transform: translateX(calc(-1 * (var(--layout-rail-width) + var(--layout-sidebar-width))));
    transition:
      transform var(--transition-normal),
      box-shadow var(--transition-normal);
  }

  .icon-rail {
    left: 0;
    width: var(--layout-rail-width);
    grid-column: auto;
  }

  .sidebar {
    left: var(--layout-rail-width);
    width: var(--layout-sidebar-width);
    grid-column: auto;
  }

  body.sidebar-open .icon-rail,
  body.sidebar-open .sidebar {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  body.sidebar-open::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: var(--z-header);
    background: var(--color-bg-overlay);
  }
}

/* TODO(tokens.css): добавить явные токены:
   --border-width-thin: 1px;
   --border-width-default: 2px;
   --scrollbar-size: 8px;
   --avatar-size-sm: 36px;
   --skeleton-animation-duration: 1.2s;
*/