/* 
   Gemini Premium Chat Design v2
   지적이고 유동적인 구글 제미나이 에스테틱 적용
*/

:root {
  --gemini-gradient: linear-gradient(135deg, #4285f4 0%, #9b72cb 50%, #d96570 100%);
  --gemini-glass: rgba(255, 255, 255, 0.72);
  --gemini-blur: blur(20px);
  --gemini-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.gemini-panel {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 380px;
  max-width: 90vw;
  height: calc(100% - 100px);
  max-height: 700px;
  background: var(--gemini-glass);
  backdrop-filter: var(--gemini-blur);
  -webkit-backdrop-filter: var(--gemini-blur);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 24px;
  box-shadow: var(--gemini-shadow);
  display: flex;
  flex-direction: column;
  z-index: 2000;
  overflow: hidden;
  transition: opacity 0.4s ease; /* transform 트랜지션은 드래그 시 방해될 수 있어 제거 */
}

.gemini-panel.hidden {
  display: none !important;
  opacity: 0;
  pointer-events: none;
}

/* 헤더: 드래그 핸들 추가 */
.gemini-panel-header {
  padding: 20px 24px;
  background: var(--gemini-gradient);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: move; /* 이동 가능 표시 */
  user-select: none;
}

.gemini-panel-header h3 {
  margin: 0;
  color: white;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.5px;
  white-space: nowrap;
}

/* 모델 선택기 스타일 */
.gemini-model-select {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 4px 8px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: all 0.2s;
  max-width: 140px;
}

.gemini-model-select:hover {
  background: rgba(255, 255, 255, 0.25);
}

.gemini-model-select option {
  background: #9b72cb; /* 그라데이션 컬러 중 하나로 배경 지정 */
  color: white;
}

.gemini-panel-header .close-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.gemini-panel-header .close-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* 메시지 영역 */
.gemini-messages {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scrollbar-width: thin;
  scrollbar-color: rgba(0,0,0,0.1) transparent;
}

.message {
  max-width: 85%;
  padding: 12px 18px;
  border-radius: 20px;
  font-size: 14.5px;
  line-height: 1.5;
  position: relative;
  animation: messageIn 0.3s ease-out;
}

@keyframes messageIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.message.ai {
  align-self: flex-start;
  background: white;
  color: #1f1f1f;
  border-bottom-left-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.message.user {
  align-self: flex-end;
  background: #4285f4;
  color: white;
  border-bottom-right-radius: 4px;
  box-shadow: 0 4px 12px rgba(66, 133, 244, 0.2);
}

/* 입력 영역 */
.gemini-input-area {
  padding: 20px 24px;
  background: rgba(255,255,255,0.5);
  border-top: 1px solid rgba(0,0,0,0.05);
  display: flex;
  gap: 12px;
  align-items: center;
}

.gemini-input-area input {
  flex: 1;
  border: 1px solid rgba(0,0,0,0.1);
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 14px;
  background: white;
  transition: border-color 0.2s;
  outline: none;
}

.gemini-input-area input:focus {
  border-color: #4285f4;
}

.gemini-input-area .send-btn {
  background: var(--gemini-gradient);
  border: none;
  color: white;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.gemini-input-area .send-btn:hover {
  transform: scale(1.05);
}

/* 로딩 애니메이션 */
.message.loading {
  background: rgba(255,255,255,0.8);
  font-style: italic;
  color: #666;
  display: flex;
  align-items: center;
  gap: 8px;
}

.message.loading::after {
  content: "...";
  display: inline-block;
  animation: dots 1.5s infinite;
  width: 1.2em;
  text-align: left;
}

@keyframes dots {
  0%, 20% { content: "."; }
  40% { content: ".."; }
  60% { content: "..."; }
  80%, 100% { content: ""; }
}