.chat-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  height: calc(100vh - 180px);
  min-height: 500px;
}
.conversation-list {
  border-radius: 28px;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow-y: auto;
}
.conversation {
  padding: 16px; border-bottom: 1px solid var(--line);
  cursor: pointer; transition: 0.2s ease;
}
.conversation:hover, .conversation.active { background: rgba(79,70,229,0.08); }
.conversation strong { display: block; margin-bottom: 4px; font-size: 15px; }
.conversation span   { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.chat-main {
  border-radius: 28px; background: rgba(255,255,255,0.72);
  border: 1px solid var(--line); box-shadow: var(--shadow);
  display: flex; flex-direction: column; overflow: hidden;
}
.chat-header {
  padding: 18px; border-bottom: 1px solid var(--line);
  font-weight: 900; background: rgba(255,255,255,0.68); flex-shrink: 0;
}
.messages-box {
  flex: 1; padding: 18px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 12px;
}
.msg { max-width: 70%; padding: 12px 14px; border-radius: 18px; line-height: 1.6; font-size: 14px; }
.msg.me    { align-self: flex-end; color: white; background: linear-gradient(135deg, var(--primary), var(--accent)); border-bottom-right-radius: 6px; }
.msg.other { align-self: flex-start; background: white; border: 1px solid var(--line); border-bottom-left-radius: 6px; }
.msg-time  { font-size: 11px; opacity: 0.72; margin-top: 4px; }
.chat-input {
  display: grid; grid-template-columns: 1fr 96px; gap: 10px;
  padding: 14px; border-top: 1px solid var(--line);
  background: rgba(255,255,255,0.68); flex-shrink: 0;
}
@media (max-width: 760px) { .chat-layout { grid-template-columns: 1fr; height: auto; } }