.chat-panel {
  display: flex;
  flex-direction: column;
  min-height: 78vh;
}

.chat-stream {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  min-height: 420px;
  padding-right: 6px;
  overflow: auto;
}

.message-card,
.system-card {
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.46);
  background: rgba(255, 255, 255, 0.36);
}

.message-card.self {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.18), rgba(255, 255, 255, 0.52));
  border-color: rgba(14, 165, 233, 0.24);
}

.system-card {
  color: var(--text-secondary);
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.28);
}

.message-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.message-user {
  font-weight: 700;
}

.message-time {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.message-body {
  line-height: 1.45;
  color: #12415f;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-image {
  display: block;
  max-width: min(100%, 380px);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 12px 28px rgba(15, 76, 117, 0.16);
}

.chat-composer {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.composer-field textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.54);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.42);
  resize: vertical;
  min-height: 84px;
  outline: none;
}

.composer-field textarea:focus {
  border-color: rgba(14, 165, 233, 0.45);
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.14);
}

.composer-actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

@media (max-width: 720px) {
  .chat-panel {
    min-height: auto;
  }

  .composer-actions {
    flex-direction: column;
  }
}