.messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: var(--content-padding-y) var(--content-padding-x) var(--input-padding-y);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  background: var(--color-surface-alt);
  scroll-behavior: smooth;
  border-radius: var(--radius-lg);
}

/* Constrain width so long messages don’t stretch too far; no width:100% so user bubbles can align right */
.messages > * {
  max-width: 720px;
}

/* Subtle scrollbar styling where supported */
.messages::-webkit-scrollbar {
  width: 8px;
}

.messages::-webkit-scrollbar-track {
  background: transparent;
}

.messages::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.messages::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

.message {
  display: flex;
  max-width: 88%;
  animation: messageIn 0.28s ease-out;
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.message-user {
  align-self: flex-end;
}

.message-user .bubble {
  background: var(--color-header);
  color: #fff;
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.message-bot {
  align-self: flex-start;
}

.message-bot .bubble {
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--radius-sm);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.bubble {
  padding: 1rem 1.25rem;
  word-break: break-word;
  line-height: 1.55;
}

.bubble p {
  margin: 0 0 0.5rem 0;
}

.bubble p:last-child {
  margin-bottom: 0;
}

.bubble .bubble-table-wrap {
  margin-top: 1rem;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  max-width: 100%;
  box-shadow: var(--shadow-sm);
}

.bubble table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

.bubble th,
.bubble td {
  padding: 0.625rem 0.875rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.bubble th {
  background: var(--color-header);
  color: #fff;
  font-weight: 600;
}

.bubble tr:hover {
  background: var(--color-surface-alt);
}

.bubble .bubble-chart {
  margin-top: 1rem;
}

.bubble .bubble-chart img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

/* Download buttons for table CSV and chart PNG */
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.625rem;
  padding: 0.4rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--layout-transition-fast), color var(--layout-transition-fast),
    border-color var(--layout-transition-fast);
}

.btn-download:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(37, 99, 235, 0.06);
}

.btn-download:active {
  transform: scale(0.97);
}

.btn-download svg {
  flex-shrink: 0;
}

.bubble .bubble-sql {
  margin-top: 1rem;
  font-family: "Consolas", "Monaco", ui-monospace, monospace;
  font-size: 0.75rem;
  padding: 0.75rem 1rem;
  background: #1e293b;
  color: #e2e8f0;
  border-radius: var(--radius-md);
  overflow-x: auto;
  border: 1px solid #334155;
}

.bubble .bubble-sql-label {
  display: block;
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
  opacity: 0.9;
  color: #9ca3af;
}

.bubble .bubble-error {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  background: #fef2f2;
  color: #b91c1c;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  border: 1px solid #fecaca;
}

.message-loading .bubble {
  color: var(--color-text-muted);
}

.message-loading .bubble::after {
  content: "...";
  animation: dots 1.2s steps(4, end) infinite;
}

@keyframes dots {
  0%, 20% { content: "."; }
  40% { content: ".."; }
  60%, 100% { content: "..."; }
}