.app-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
  padding: 24px;
  height: 100vh;
  min-height: 100svh;
  height: 100dvh;
  overflow: hidden;
}

.sidebar {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.sidebar h2 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.user-search {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: var(--panel-2);
  color: var(--text);
  font-size: 14px;
  margin-bottom: 12px;
}

.user-search:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

.chat-panel {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 18px 22px;
  border-bottom: 1px solid var(--stroke);
  flex: 0 0 auto;
}

.chat-header.is-group,
.chat-header.is-direct {
  cursor: pointer;
}

.chat-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-actions {
  display: flex;
  gap: 8px;
}

.chat-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-title h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.chat-handle {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.chat-title p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.typing-indicator {
  display: inline-flex;
  margin-top: 4px;
  font-size: 12px;
  color: var(--accent-2);
  letter-spacing: 0.02em;
}

.net-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  user-select: none;
}

.net-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--status-offline);
  box-shadow: 0 0 8px color-mix(in srgb, var(--status-offline) 60%, transparent);
}

.net-indicator.good .net-dot {
  background: var(--status-good);
  box-shadow: 0 0 10px color-mix(in srgb, var(--status-good) 60%, transparent);
}

.net-indicator.ok .net-dot {
  background: var(--status-warn);
  box-shadow: 0 0 10px color-mix(in srgb, var(--status-warn) 55%, transparent);
}

.net-indicator.bad .net-dot {
  background: var(--status-bad);
  box-shadow: 0 0 10px color-mix(in srgb, var(--status-bad) 60%, transparent);
}

.net-indicator.offline .net-dot {
  background: var(--status-offline);
  box-shadow: 0 0 8px color-mix(in srgb, var(--status-offline) 60%, transparent);
}

.call-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--stroke);
  background: linear-gradient(
    120deg,
    color-mix(in srgb, var(--accent) 18%, transparent),
    color-mix(in srgb, var(--panel) 90%, transparent)
  );
}

.call-banner.is-return {
  border-bottom-color: color-mix(in srgb, var(--status-good) 35%, transparent);
  background: linear-gradient(
    120deg,
    color-mix(in srgb, var(--status-good) 18%, transparent),
    color-mix(in srgb, var(--panel) 90%, transparent)
  );
}

.call-banner.is-incoming {
  border-bottom-color: color-mix(in srgb, var(--status-warn) 45%, transparent);
  background: linear-gradient(
    120deg,
    color-mix(in srgb, var(--status-warn) 18%, transparent),
    color-mix(in srgb, var(--panel) 90%, transparent)
  );
  box-shadow: inset 0 -1px 0 color-mix(in srgb, var(--status-warn) 30%, transparent);
}

.call-banner.is-incoming .call-banner-actions button {
  border-color: color-mix(in srgb, var(--status-warn) 55%, transparent);
  background: color-mix(in srgb, var(--status-warn) 22%, transparent);
}

.call-banner.is-incoming .call-banner-actions .secondary {
  border-color: var(--stroke);
  background: var(--panel);
  color: var(--muted);
}

.call-banner.is-incoming .call-banner-title {
  color: color-mix(in srgb, var(--status-warn) 70%, var(--text));
}

.call-banner.is-return .call-banner-actions button {
  border-color: color-mix(in srgb, var(--status-good) 60%, transparent);
  background: color-mix(in srgb, var(--status-good) 20%, transparent);
}

.call-banner.is-return .call-banner-actions .secondary {
  border-color: var(--stroke);
  background: var(--panel);
  color: var(--muted);
}

.call-banner-avatars {
  display: flex;
  align-items: center;
}

.call-banner-avatars .avatar {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
  background: color-mix(in srgb, var(--panel) 85%, transparent);
  display: grid;
  place-items: center;
  font-weight: 600;
  overflow: hidden;
}

.call-banner-avatars .avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.call-banner-avatars .avatar + .avatar {
  margin-left: -8px;
}

.call-banner-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}

.call-banner-title {
  font-size: 14px;
  font-weight: 600;
}

.call-banner-subtitle {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.call-banner-actions {
  display: flex;
  gap: 8px;
}

.call-banner-actions button {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 60%, transparent);
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
}

.call-banner-actions .secondary {
  border-color: var(--stroke);
  background: var(--panel);
  color: var(--muted);
}

#chat-subtitle:empty {
  display: none;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
  scrollbar-gutter: stable;
}

.empty-state {
  margin-top: 40px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}