.chat-shell {
  --chat-border: #d8dee7;
  --chat-bg: #f5f7fa;
  --chat-panel: #ffffff;
  --chat-muted: #5b6472;
  --chat-ink: #1f2937;
  --chat-accent: #114b8b;
  --chat-accent-soft: #dce9f8;
  --chat-support: #eef2f7;
  display: grid;
  gap: 16px;
}

.chat-shell-page {
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  min-height: 70vh;
}

.chat-shell-offcanvas {
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  min-height: 72vh;
}

.chat-shell-sidebar,
.chat-shell-thread {
  background: var(--chat-panel);
  border: 1px solid var(--chat-border);
  border-radius: 18px;
  overflow: hidden;
}

.chat-shell-sidebar-head,
.chat-thread-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--chat-border);
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
}

.chat-shell-sidebar-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.chat-shell-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--chat-ink);
}

.chat-shell-subtitle,
.chat-thread-meta,
.chat-list-empty,
.chat-empty-copy {
  color: var(--chat-muted);
}

.chat-shell-list {
  padding: 12px;
  display: grid;
  gap: 10px;
  max-height: calc(70vh - 100px);
  overflow-y: auto;
  background: var(--chat-bg);
}

.chat-compose {
  background: #fff;
}

.chat-conversation-item {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 16px;
  padding: 14px 15px;
  text-align: left;
  background: #fff;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.chat-sidebar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  margin-left: auto;
}

.chat-sidebar-actions .btn {
  white-space: nowrap;
  flex: 0 0 auto;
}

.chat-conversation-item:hover,
.chat-conversation-item.is-active {
  border-color: rgba(17, 75, 139, 0.35);
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(17, 75, 139, 0.08);
}

.chat-conversation-topline,
.chat-conversation-footer,
.chat-message-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.chat-conversation-subject,
.chat-thread-subject {
  color: var(--chat-ink);
  font-weight: 700;
}

.chat-conversation-status,
.chat-conversation-footer,
.chat-message-head {
  font-size: 0.82rem;
  color: var(--chat-muted);
}

.chat-conversation-preview {
  margin-top: 8px;
  font-size: 0.93rem;
  color: #334155;
}

.chat-conversation-unread,
#chat-unread-badge {
  min-width: 22px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--chat-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  text-align: center;
}

.chat-thread-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-thread-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.chat-thread-messages {
  flex: 1 1 auto;
  padding: 18px;
  background:
    radial-gradient(circle at top right, rgba(17, 75, 139, 0.06), transparent 26%),
    linear-gradient(180deg, #f8fafc 0%, #eef3f8 100%);
  overflow-y: auto;
}

.chat-message {
  display: flex;
  margin-bottom: 14px;
}

.chat-message.is-customer {
  justify-content: flex-end;
}

.chat-message.is-support {
  justify-content: flex-start;
}

.chat-message-bubble {
  max-width: min(82%, 720px);
  border-radius: 18px;
  padding: 12px 14px;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.chat-message.is-customer .chat-message-bubble {
  background: var(--chat-accent-soft);
  color: var(--chat-ink);
  border-bottom-right-radius: 6px;
}

.chat-message.is-support .chat-message-bubble {
  background: var(--chat-support);
  color: var(--chat-ink);
  border-bottom-left-radius: 6px;
}

.chat-message-text {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.chat-thread-form {
  padding: 18px;
  border-top: 1px solid var(--chat-border);
  background: #fff;
}

.chat-empty-state {
  display: grid;
  place-items: center;
  min-height: 100%;
  padding: 40px 28px;
  text-align: center;
  background:
    radial-gradient(circle at top left, rgba(17, 75, 139, 0.08), transparent 24%),
    linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
}

.chat-empty-title {
  color: var(--chat-ink);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.chat-list-empty {
  padding: 18px;
  border: 1px dashed var(--chat-border);
  border-radius: 14px;
  background: #fff;
}

.chat-navbar-trigger {
  position: relative;
}

.chat-navbar-icon-wrap {
  z-index: 2;
}

.chat-navbar-icon-wrap #chat-unread-badge {
  top: -8px;
  left: auto;
  right: -8px;
  min-width: 18px;
  width: 18px;
  height: 18px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  background: #ffcc00;
  color: #000;
  border: 1px solid rgba(0, 0, 0, 0.25);
}

.chat-message.is-system {
  justify-content: center;
}

.chat-message.is-system .chat-message-bubble {
  max-width: min(72%, 680px);
  background: #fff5cf;
  color: var(--chat-ink);
  border: 1px solid #f0df92;
  border-radius: 14px;
}

@media (max-width: 991.98px) {
  .chat-shell-page,
  .chat-shell-offcanvas {
    grid-template-columns: 1fr;
  }

  .chat-shell-list {
    max-height: 260px;
  }

  .chat-message-bubble {
    max-width: 100%;
  }
}