/* ============================================================
   Copilot AI Chat
   ============================================================ */
.copilot-layout {
  display: grid; grid-template-columns: 260px 1fr;
  height: calc(100vh - var(--k-topbar-h, 76px));
  overflow: hidden;
}
.copilot-sidebar {
  border-right: 1px solid var(--k-outline-variant);
  display: flex; flex-direction: column; overflow: hidden;
}
.copilot-sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px; border-bottom: 1px solid var(--k-outline-variant);
}
.copilot-conv-list { flex: 1; overflow-y: auto; padding: 8px; }
.copilot-conv-item {
  display: flex; align-items: center; gap: 4px;
  padding: 10px 12px; border-radius: 10px; cursor: pointer;
  transition: background .15s; margin-bottom: 2px;
}
.copilot-conv-item:hover,
.copilot-conv-item.active { background: var(--k-surface-container); }
.copilot-conv-title {
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-size: .85rem;
}
.copilot-conv-delete { opacity: 0; transition: opacity .15s; }
.copilot-conv-item:hover .copilot-conv-delete { opacity: 1; }

.copilot-main { display: flex; flex-direction: column; overflow: hidden; }
.copilot-messages {
  flex: 1; overflow-y: auto; padding: 24px;
  display: flex; flex-direction: column; gap: 16px;
}

.copilot-welcome {
  margin: auto; text-align: center; max-width: 480px; padding: 40px 0;
}
.copilot-welcome-icon .material-symbols-outlined {
  font-size: 48px; color: var(--k-primary);
  background: linear-gradient(135deg, #6366f1, #a78bfa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.copilot-suggestions {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 20px;
}
.copilot-suggestion {
  background: var(--k-surface-container); border: 1px solid var(--k-outline-variant);
  border-radius: var(--k-radius-md); padding: 12px; font-size: .85rem;
  cursor: pointer; text-align: left; transition: background .15s;
}
.copilot-suggestion:hover { background: var(--k-surface-container-high); }

.copilot-bubble-row { display: flex; gap: 10px; max-width: 80%; }
.copilot-bubble-row.user { align-self: flex-end; flex-direction: row-reverse; }
.copilot-bubble-row.assistant { align-self: flex-start; }
.copilot-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 18px;
}
.copilot-avatar.user { background: var(--k-primary); color: #fff; }
.copilot-avatar.user .material-symbols-outlined { font-size: 18px; color: #fff; }
.copilot-avatar.assistant { background: linear-gradient(135deg, #6366f1, #a78bfa); color: #fff; }
.copilot-avatar.assistant .material-symbols-outlined { font-size: 18px; color: #fff; }

.copilot-bubble {
  padding: 12px 16px; border-radius: var(--k-radius-lg); font-size: .9rem;
  line-height: 1.5; word-break: break-word;
}
.copilot-bubble.user {
  background: var(--k-primary); color: #fff;
  border-bottom-right-radius: 4px;
}
.copilot-bubble.assistant {
  background: var(--k-surface-container); color: var(--k-on-surface);
  border-bottom-left-radius: 4px;
}
.copilot-bubble pre.copilot-code {
  background: var(--k-surface); border-radius: var(--k-radius-sm); padding: 10px;
  overflow-x: auto; font-size: .8rem; margin: 8px 0;
}
.copilot-bubble code {
  background: var(--k-surface); padding: 2px 5px; border-radius: 4px; font-size: .85em;
}

.copilot-typing { display: flex; gap: 4px; padding: 14px 16px; }
.copilot-typing span {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--k-on-surface-variant); opacity: .4;
  animation: copilotDot .6s infinite alternate;
}
.copilot-typing span:nth-child(2) { animation-delay: .2s; }
.copilot-typing span:nth-child(3) { animation-delay: .4s; }
@keyframes copilotDot { to { opacity: 1; transform: translateY(-3px); } }

.copilot-input-area {
  border-top: 1px solid var(--k-outline-variant);
  padding: 16px 24px;
}
.copilot-input-row { display: flex; gap: 8px; align-items: flex-end; }
.copilot-input {
  flex: 1; resize: none; border: 1px solid var(--k-outline-variant);
  border-radius: var(--k-radius-lg); padding: 12px 16px; font-size: .9rem;
  font-family: inherit; background: var(--k-surface-container);
  color: var(--k-on-surface); outline: none; min-height: 44px;
  max-height: 120px; overflow-y: auto; field-sizing: content;
  transition: border-color .15s;
}
.copilot-input:focus { border-color: var(--k-primary); }
.copilot-send-btn {
  border-radius: 50%; width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.copilot-disclaimer {
  text-align: center; font-size: .7rem; color: var(--k-on-surface-variant);
  margin-top: 8px;
}

@media (max-width: 768px) {
  .copilot-layout { grid-template-columns: 1fr; }
  .copilot-sidebar { display: none; }
  .copilot-bubble-row { max-width: 95%; }
  .copilot-suggestions { grid-template-columns: 1fr; }
}