/* ==========================================================
   압연롤 설계 AI — Gemini Dark 스타일
   ========================================================== */

/* ----------------------------------------------------------
   1. CSS 변수 (항상 다크 모드)
   ---------------------------------------------------------- */
:root {
  /* 배경 */
  --bg-app:            #131314;
  --bg-sidebar:        #1e1f20;
  --bg-sidebar-hover:  #2a2b2d;
  --bg-sidebar-active: rgba(138, 180, 248, 0.12);
  --bg-chat:           #131314;
  --bg-header:         #131314;
  --bg-input-wrapper:  #1e1f20;
  --bg-user-message:   #2c3e55;
  --bg-modal:          rgba(0, 0, 0, 0.72);
  --bg-modal-box:      #1e1f20;
  --bg-params:         #1e1f20;
  --bg-chip:           #2a2b2d;
  --bg-chip-hover:     #35373b;
  --bg-code:           #2a2b2d;

  /* 텍스트 */
  --text-primary:        #e3e3e3;
  --text-secondary:      #c4c7c5;
  --text-muted:          #8e918f;
  --text-inverse:        #1f1f1f;
  --text-sidebar:        #e3e3e3;
  --text-sidebar-muted:  #8e918f;
  --text-user:           #e3e3e3;
  --text-link:           #8ab4f8;

  /* 색상 */
  --color-primary:           #8ab4f8;
  --color-primary-hover:     #adc8ff;
  --color-on-primary:        #1f1f1f;
  --color-primary-container: #0842a0;

  /* 경계선 */
  --border-color:       #3f4145;
  --border-input:       #5e6368;
  --border-radius-sm:   8px;
  --border-radius:      16px;
  --border-radius-lg:   24px;
  --border-radius-pill: 9999px;

  /* 그림자 */
  --shadow-sm:    0 1px 2px rgba(0,0,0,.35);
  --shadow-md:    0 2px 8px rgba(0,0,0,.5);
  --shadow-input: 0 1px 4px rgba(0,0,0,.4);
  --shadow-modal: 0 8px 32px rgba(0,0,0,.6);

  /* 간격 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 40px;

  /* 레이아웃 */
  --sidebar-width:      256px;
  --params-panel-width: 320px;
  --header-height:      60px;
  --chat-max-width:     780px;

  /* 타이포그래피 */
  --font-family: 'Google Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    'Noto Sans KR', sans-serif;
  --font-size-xs:   11px;
  --font-size-sm:   13px;
  --font-size-base: 14px;
  --font-size-md:   15px;
  --font-size-lg:   18px;
  --font-size-xl:   22px;
  --font-size-2xl:  28px;
  --font-size-3xl:  36px;
  --line-height-base: 1.7;

  /* 전환 */
  --transition:      180ms cubic-bezier(.2,0,0,1);
  --transition-slow: 280ms cubic-bezier(.2,0,0,1);

  /* Gemini 그라디언트 */
  --gemini-gradient: linear-gradient(135deg, #4285f4 0%, #9b72cb 35%, #d96570 65%, #f29900 100%);
}

/* ----------------------------------------------------------
   2. 리셋 & 기본
   ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: var(--font-size-base); scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: var(--line-height-base);
  min-height: 100vh;
  overflow: hidden;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ----------------------------------------------------------
   3. 버튼 공통
   ---------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: inherit; font-size: var(--font-size-sm); font-weight: 500;
  line-height: 1; border: none; border-radius: var(--border-radius-pill);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
    box-shadow var(--transition);
  text-decoration: none; white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover:not(:disabled) { background-color: var(--color-primary-hover); }

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-pill);
  padding: 7px 16px;
  font-size: var(--font-size-sm);
}
.btn-outline:hover:not(:disabled) { background-color: var(--bg-sidebar-hover); }

.btn-icon {
  width: 40px; height: 40px; padding: 0;
  background-color: transparent;
  color: var(--text-secondary);
  border-radius: 50%;
  flex-shrink: 0;
}
.btn-icon:hover:not(:disabled) {
  background-color: var(--bg-sidebar-hover);
  color: var(--text-primary);
}

.btn-full { width: 100%; }

/* 새 채팅 버튼 */
.btn-new-chat {
  display: flex; align-items: center; gap: 10px;
  width: calc(100% - 20px); margin: 4px 10px;
  padding: 9px 14px;
  background-color: transparent;
  color: var(--text-sidebar);
  border-radius: var(--border-radius-pill);
  font-size: 15px; font-weight: 500;
  border: none; cursor: pointer;
  transition: background-color var(--transition);
}
.btn-new-chat:hover { background-color: var(--bg-sidebar-hover); }
.btn-new-chat svg { flex-shrink: 0; }

/* 전송 버튼 */
.btn-send {
  width: 36px; height: 36px; border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  flex-shrink: 0;
  transition: background-color var(--transition), transform var(--transition);
  display: flex; align-items: center; justify-content: center;
  border: none; cursor: pointer;
}
.btn-send:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  transform: scale(1.05);
}
.btn-send:disabled { background-color: var(--border-color); color: var(--text-muted); cursor: not-allowed; }
.btn-send svg { width: 18px; height: 18px; }

/* ----------------------------------------------------------
   4. 앱 레이아웃
   ---------------------------------------------------------- */
.app-layout {
  display: flex; height: 100vh; overflow: hidden; position: relative;
}

/* ----------------------------------------------------------
   5. 사이드바
   ---------------------------------------------------------- */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--bg-sidebar);
  display: flex; flex-direction: column;
  flex-shrink: 0; overflow: hidden;
  transition: transform var(--transition-slow), width var(--transition-slow);
  z-index: 200;
}

/* 사이드바 접힌 상태 */
.sidebar--collapsed {
  width: 52px;
}
.sidebar--collapsed .sidebar-top-bar {
  justify-content: center;
  padding: 10px 6px 4px;
}
.sidebar--collapsed .sidebar-top-bar > :not(:first-child) {
  display: none;
}
.sidebar--collapsed .sidebar-new-chat-area,
.sidebar--collapsed .sidebar-nav-item,
.sidebar--collapsed nav[aria-label="세션 목록"],
.sidebar--collapsed .sidebar-bottom {
  display: none;
}

/* 사이드바 상단: 햄버거 + 검색 */
.sidebar-top-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 8px 4px;
  flex-shrink: 0;
}

.sidebar-brand-row {
  display: flex; align-items: center; gap: 10px; padding: 6px 16px 10px;
  flex-shrink: 0;
}
.sidebar-logo-icon { width: 24px; height: 24px; flex-shrink: 0; }
.sidebar-brand {
  font-size: 17px; font-weight: 600;
  color: var(--text-sidebar); letter-spacing: -0.2px;
}

/* 새 채팅 영역 */
.sidebar-new-chat-area {
  padding: 2px 0 8px;
  flex-shrink: 0;
}

/* 사이드바 내비 아이템 (내 항목 등) */
.sidebar-nav-item {
  display: flex; align-items: center; gap: 14px;
  padding: 9px 16px;
  font-size: 15px; color: var(--text-sidebar);
  cursor: pointer; border: none; background: transparent; width: 100%;
  text-align: left; border-radius: var(--border-radius-pill);
  transition: background-color var(--transition);
}
.sidebar-nav-item:hover { background-color: var(--bg-sidebar-hover); }
.sidebar-nav-item svg { flex-shrink: 0; color: var(--text-muted); }

/* 섹션 타이틀 */
.sidebar-section-title {
  padding: 12px 14px 4px;
  font-size: 13px; font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-sidebar-muted);
}

/* 세션 목록 */
.session-list {
  list-style: none;
  padding: 0 8px;
  flex: 1; overflow-y: auto;
}
.session-list::-webkit-scrollbar { width: 4px; }
.session-list::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: var(--border-radius-pill);
}

.session-list-empty {
  padding: var(--spacing-md) var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-sidebar-muted); text-align: center;
}

.session-list li { position: relative; }

.session-item {
  display: flex; align-items: center;
  padding: 10px 36px 10px 14px;
  border-radius: var(--border-radius-sm);
  position: relative;
  cursor: pointer; color: var(--text-sidebar);
  font-size: 15px;
  transition: background-color var(--transition);
  background-color: transparent; border: none;
  width: 100%; text-align: left;
}
.session-item:hover { background-color: var(--bg-sidebar-hover); }
.session-item--active { background-color: var(--bg-sidebar-active); }

/* Gemini 스타일: 아이콘·날짜 숨김, 세션명만 표시 */
.session-item-icon { display: none; }

.session-item-info { overflow: hidden; flex: 1; min-width: 0; }
.session-item-title {
  display: block; font-weight: 400;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: inherit; font-size: 15px;
}
.session-item-date { display: none; }

/* 고정 아이콘 */
.session-item-pin {
  position: absolute; right: 10px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted); line-height: 0;
}
.session-list li:hover .session-item-pin { visibility: hidden; }

/* 세션 3점 메뉴 버튼 */
.session-item-menu-btn {
  display: none; position: absolute; right: 6px; top: 50%;
  transform: translateY(-50%); z-index: 2;
  width: 28px; height: 28px; padding: 0;
  background: transparent; border: none; border-radius: 50%;
  cursor: pointer; color: var(--text-muted);
  align-items: center; justify-content: center;
}
.session-item-menu-btn:hover {
  background-color: var(--bg-sidebar-hover); color: var(--text-primary);
}
.session-list li:hover .session-item-menu-btn { display: flex; }

/* 컨텍스트 메뉴 */
.session-context-menu {
  position: fixed; z-index: 500;
  background-color: #2a2b2d;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  padding: 4px 0; min-width: 160px;
}
.session-context-menu-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 8px 16px;
  background: transparent; border: none; cursor: pointer;
  color: var(--text-primary); font-size: var(--font-size-sm);
  font-family: inherit; text-align: left;
  transition: background-color var(--transition);
}
.session-context-menu-item:hover { background-color: var(--bg-sidebar-hover); }
.session-context-menu-item--disabled { opacity: 0.4; cursor: not-allowed; }
.session-context-menu-item--disabled:hover { background-color: transparent; }
.session-context-menu-item svg { width: 16px; height: 16px; flex-shrink: 0; }

/* 세션 모달 (이름 변경 / 삭제) */
.session-modal-overlay {
  position: fixed; inset: 0;
  background-color: var(--bg-modal);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; backdrop-filter: blur(4px);
}
.session-modal-overlay[hidden] { display: none; }
.session-modal {
  background-color: var(--bg-modal-box);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  width: 100%; max-width: 420px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-modal);
  animation: modalIn .2s ease;
}
.session-modal-title {
  font-size: var(--font-size-xl); font-weight: 500;
  color: var(--text-primary); margin-bottom: var(--spacing-md);
}
.session-modal-desc {
  font-size: var(--font-size-sm); color: var(--text-secondary);
  margin-bottom: var(--spacing-md); line-height: 1.5;
}
.session-modal-input {
  width: 100%; padding: 11px var(--spacing-md);
  font-family: inherit; font-size: var(--font-size-base);
  color: var(--text-primary); background-color: var(--bg-app);
  border: 1px solid var(--border-input);
  border-radius: var(--border-radius-sm); outline: none;
  margin-bottom: var(--spacing-lg);
}
.session-modal-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(138,180,248,.18);
}
.session-modal-actions {
  display: flex; justify-content: flex-end; gap: var(--spacing-sm);
}
.session-modal-btn {
  padding: 8px 20px; font-family: inherit;
  font-size: var(--font-size-sm); font-weight: 500;
  border: none; border-radius: var(--border-radius-pill);
  cursor: pointer; background: transparent;
  transition: background-color var(--transition);
}
.session-modal-btn--cancel { color: var(--color-primary); }
.session-modal-btn--cancel:hover { background-color: var(--bg-sidebar-hover); }
.session-modal-btn--confirm { color: var(--color-primary); }
.session-modal-btn--confirm:hover { background-color: var(--bg-sidebar-hover); }
.session-modal-btn--danger { color: #f28b82; }
.session-modal-btn--danger:hover { background-color: rgba(242,139,130,.1); }

/* 사이드바 하단 */
.sidebar-bottom {
  flex-shrink: 0;
  padding: 8px 0;
  border-top: 1px solid var(--border-color);
}

/* 오버레이 */
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background-color: rgba(0,0,0,.5); z-index: 190;
}

/* ----------------------------------------------------------
   6. 채팅 메인
   ---------------------------------------------------------- */
.chat-main {
  flex: 1; display: flex; flex-direction: column;
  overflow: hidden; background-color: var(--bg-chat); min-width: 0;
}

/* ----------------------------------------------------------
   7. 헤더 (Gemini: 왼쪽 모델명, 중앙 제목, 오른쪽 버튼들)
   ---------------------------------------------------------- */
.chat-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: var(--header-height);
  padding: 0 var(--spacing-sm);
  background-color: var(--bg-header);
  flex-shrink: 0;
}

.header-left {
  display: flex; align-items: center;
  gap: var(--spacing-xs); min-width: 0;
}

.header-center {
  display: flex; align-items: center; justify-content: center;
  min-width: 0; overflow: hidden;
}

.header-session-title {
  font-size: 18px; color: var(--text-secondary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 400px;
}

.header-right {
  display: flex; align-items: center; justify-content: flex-end;
  gap: 4px; flex-shrink: 0;
}

/* 모델명 칩 */
.header-model-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px 6px 8px;
  border-radius: var(--border-radius-pill);
  cursor: pointer;
  font-size: var(--font-size-md); font-weight: 500;
  color: var(--text-primary);
  background: transparent; border: none; font-family: inherit;
  transition: background-color var(--transition);
  white-space: nowrap;
}
.header-model-chip:hover { background-color: var(--bg-sidebar-hover); }
.header-model-chip svg { width: 20px; height: 20px; flex-shrink: 0; }
.header-model-name { font-size: 28px; font-weight: 400; letter-spacing: -.2px; }

.user-info {
  font-size: var(--font-size-sm); color: var(--text-secondary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 130px;
}

/* 아바타 버튼 */
.user-avatar-btn {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, #4285f4, #34a853);
  color: #fff; font-size: 13px; font-weight: 600;
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

/* ----------------------------------------------------------
   8. 채팅 콘텐츠 래퍼
   ---------------------------------------------------------- */
.chat-content-wrapper {
  display: flex; flex: 1; overflow: hidden; position: relative;
}

.chat-messages-section {
  flex: 1; overflow: hidden;
  display: flex; flex-direction: column; min-width: 0;
}

/* ----------------------------------------------------------
   9. 채팅 메시지 영역
   ---------------------------------------------------------- */
.chat-messages {
  flex: 1; overflow-y: auto;
  padding: var(--spacing-lg) var(--spacing-md);
  display: flex; flex-direction: column;
  scroll-behavior: smooth;
}
.chat-messages::-webkit-scrollbar { width: 5px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: var(--border-radius-pill);
}

.messages-inner {
  max-width: var(--chat-max-width);
  margin: 0 auto; width: 100%;
  display: flex; flex-direction: column;
  gap: 20px;
}

/* ----------------------------------------------------------
   10. 환영 화면
   ---------------------------------------------------------- */
.welcome-screen {
  display: flex; flex-direction: column;
  align-items: flex-start; justify-content: center;
  flex: 1; padding: var(--spacing-xl) var(--spacing-md);
  max-width: var(--chat-max-width); width: 100%;
  margin: 0 auto;
}

.welcome-greeting-row {
  display: flex; align-items: center;
  gap: 12px;
}

.welcome-mascot {
  width: 73px; height: 73px; flex-shrink: 0;
}

.welcome-greeting {
  font-size: var(--font-size-2xl); font-weight: 500;
  letter-spacing: -.3px; line-height: 1.3;
  background: var(--gemini-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.welcome-subtitle {
  font-size: 44px; color: var(--text-primary);
  margin-top: var(--spacing-sm); margin-bottom: 0; font-weight: 400;
  line-height: 1.2; letter-spacing: -.5px;
}

.welcome-chips {
  display: flex; flex-wrap: wrap; justify-content: flex-start;
  gap: var(--spacing-sm);
  margin-top: 12px;
}

.welcome-chip {
  padding: 10px 20px;
  background-color: var(--bg-chip);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-pill);
  cursor: pointer; font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.4;
  transition: background-color var(--transition), border-color var(--transition);
  font-family: inherit; white-space: nowrap;
}
.welcome-chip:hover {
  background-color: var(--bg-chip-hover);
  border-color: rgba(138,180,248,.4);
  color: var(--text-primary);
}

/* ----------------------------------------------------------
   11. 메시지
   ---------------------------------------------------------- */
.message {
  display: flex; gap: 12px; max-width: 100%;
  animation: msgIn .18s ease;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}

.message--user { flex-direction: row-reverse; }

.message-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; flex-shrink: 0; margin-top: 2px;
  background-color: var(--color-primary); color: #fff;
}

.message--user .message-avatar {
  font-size: var(--font-size-xs);
  background: linear-gradient(135deg, #4285f4, #34a853);
}

.message--assistant .message-avatar {
  background: transparent; overflow: hidden;
}
.message-avatar-img {
  width: 32px; height: 32px; border-radius: 50%;
  object-fit: cover;
}

.message-body {
  display: flex; flex-direction: column; gap: 2px;
  max-width: min(76%, 640px); min-width: 0;
}
.message--user .message-body { align-items: flex-end; }

.message-bubble {
  word-break: break-word; overflow-wrap: anywhere;
  font-size: var(--font-size-md); line-height: var(--line-height-base);
}

.message--user .message-bubble {
  background-color: var(--bg-user-message);
  color: var(--text-user);
  padding: 10px 16px;
  border-radius: 20px 20px 4px 20px;
}

.message--assistant .message-bubble {
  background: transparent; color: var(--text-primary); padding: 4px 0;
}

/* 스트리밍 커서 */
.message-bubble--streaming::after {
  content: ''; display: inline-block;
  width: 2px; height: 1.1em;
  background-color: var(--color-primary);
  margin-left: 3px; vertical-align: text-bottom;
  animation: blink .8s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.message-time {
  font-size: var(--font-size-xs); color: var(--text-muted);
  opacity: 0; transition: opacity var(--transition);
}
.message:hover .message-time { opacity: 1; }

/* 마크다운 */
.message-bubble p { margin-bottom: 10px; }
.message-bubble p:last-child { margin-bottom: 0; }
.message-bubble h1,.message-bubble h2,.message-bubble h3 {
  font-weight: 600; margin-bottom: 10px; margin-top: var(--spacing-md); letter-spacing: -.3px;
}
.message-bubble h1:first-child,.message-bubble h2:first-child,.message-bubble h3:first-child { margin-top: 0; }
.message-bubble h1 { font-size: var(--font-size-xl); }
.message-bubble h2 { font-size: var(--font-size-lg); }
.message-bubble h3 { font-size: var(--font-size-md); }
.message-bubble ul,.message-bubble ol { padding-left: var(--spacing-lg); margin-bottom: 10px; }
.message-bubble li { margin-bottom: 4px; }
.message-bubble code {
  font-family: 'Fira Code','SF Mono',monospace; font-size: .88em;
  background-color: var(--bg-code); padding: 2px 6px; border-radius: 4px;
}
.message--user .message-bubble code { background-color: rgba(255,255,255,.12); }
.message-bubble pre {
  background-color: var(--bg-code); border-radius: var(--border-radius-sm);
  padding: var(--spacing-md); overflow-x: auto; margin-bottom: 10px;
  border: 1px solid var(--border-color);
}
.message-bubble pre code { background: none; padding: 0; font-size: .85em; }
.message-bubble strong { font-weight: 600; }
.message-bubble em { font-style: italic; }
.message-bubble a { color: var(--text-link); text-decoration: underline; }
.message-bubble table {
  width: 100%; border-collapse: collapse; margin-bottom: 10px;
  font-size: var(--font-size-sm); border-radius: var(--border-radius-sm); overflow: hidden;
}
.message-bubble th,.message-bubble td { padding: 8px 12px; border: 1px solid var(--border-color); text-align: left; }
.message-bubble th { background-color: var(--bg-chip); font-weight: 600; }
.message-bubble blockquote {
  border-left: 3px solid var(--color-primary); padding-left: var(--spacing-md);
  color: var(--text-secondary); margin-bottom: 10px;
}
.message-bubble hr { border: none; border-top: 1px solid var(--border-color); margin: var(--spacing-md) 0; }

/* ----------------------------------------------------------
   12. 입력 영역 (Gemini 스타일 pill)
   ---------------------------------------------------------- */
.chat-input-area {
  padding: var(--spacing-sm) var(--spacing-md) 14px;
  background-color: var(--bg-chat); flex-shrink: 0;
}

.chat-input-container {
  max-width: var(--chat-max-width); margin: 0 auto;
}

/* 입력 박스 전체 */
.chat-input-wrapper {
  background-color: var(--bg-input-wrapper);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-input);
  overflow: hidden;
}
.chat-input-wrapper:focus-within {
  border-color: rgba(138,180,248,.5);
  box-shadow: 0 0 0 1px rgba(138,180,248,.2);
}

/* 텍스트 입력 행 */
.chat-input-row {
  display: flex; align-items: flex-end;
  padding: 12px 12px 8px 16px; gap: var(--spacing-sm);
}

.chat-input {
  flex: 1; background: none; border: none; outline: none;
  font-family: inherit; font-size: var(--font-size-md);
  color: var(--text-primary); resize: none; line-height: 1.5;
  max-height: 180px; overflow-y: auto; min-height: 26px;
}
.chat-input::placeholder { color: var(--text-muted); }

/* 하단 툴바 행 */
.chat-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 12px 10px;
}

.chat-toolbar-left {
  display: flex; align-items: center; gap: 4px;
}

.chat-toolbar-right {
  display: flex; align-items: center; gap: 6px;
}

/* 툴바 버튼 */
.toolbar-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 5px 10px;
  background: transparent; border: none;
  border-radius: var(--border-radius-pill);
  font-size: var(--font-size-sm); color: var(--text-muted);
  cursor: pointer; font-family: inherit;
  transition: background-color var(--transition), color var(--transition);
}
.toolbar-btn:hover { background-color: var(--bg-sidebar-hover); color: var(--text-secondary); }
.toolbar-btn svg { flex-shrink: 0; }
.toolbar-btn--icon {
  padding: 5px; border-radius: 50%; width: 32px; height: 32px;
  justify-content: center;
}

.chat-input-hint {
  margin-top: 8px; font-size: 11px;
  color: var(--text-muted); text-align: center;
}

/* ----------------------------------------------------------
   13. 파라미터 패널
   ---------------------------------------------------------- */
.params-panel {
  width: var(--params-panel-width); height: 100%;
  background-color: var(--bg-params);
  border-left: 1px solid var(--border-color);
  display: flex; flex-direction: column;
  overflow: hidden; flex-shrink: 0;
  transition: transform var(--transition-slow), width var(--transition-slow);
  transform: translateX(100%); width: 0;
  border-left-width: 0; pointer-events: none;
}
.params-panel--open {
  transform: translateX(0); width: var(--params-panel-width);
  border-left-width: 1px; pointer-events: auto;
}

.params-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--spacing-md); border-bottom: 1px solid var(--border-color); flex-shrink: 0;
}
.params-header-left {
  display: flex; align-items: center; gap: 8px; min-width: 0;
}
.params-title { font-size: var(--font-size-md); font-weight: 600; color: var(--text-primary); white-space: nowrap; }
.params-state-badge {
  display: none; font-size: 11px; font-weight: 500; line-height: 1;
  padding: 2px 8px; border-radius: 10px; white-space: nowrap;
}
.params-state-badge[data-state] { display: inline-block; }
.params-state-badge[data-state="GREETING"]       { background: #868e96; color: #fff; }
.params-state-badge[data-state="INFO_GATHERING"]  { background: #339af0; color: #fff; }
.params-state-badge[data-state="CLARIFICATION"]   { background: #f59f00; color: #fff; }
.params-state-badge[data-state="CALCULATION"]     { background: #845ef7; color: #fff; }
.params-state-badge[data-state="CONFIRMATION"]    { background: #20c997; color: #fff; }
.params-state-badge[data-state="COMPLETE"]        { background: #51cf66; color: #fff; }
.params-state-badge[data-state="ERROR"]           { background: #ff6b6b; color: #fff; }
.params-close-btn { color: var(--text-muted); }

.params-progress {
  padding: var(--spacing-md); border-bottom: 1px solid var(--border-color); flex-shrink: 0;
}
.params-progress-label {
  display: flex; justify-content: space-between; margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm); color: var(--text-secondary);
}
.params-progress-bar {
  height: 4px; background-color: var(--border-color);
  border-radius: var(--border-radius-pill); overflow: hidden;
}
.params-progress-fill {
  height: 100%; background: var(--gemini-gradient);
  border-radius: var(--border-radius-pill);
  transition: width var(--transition-slow);
}

/* 탭 네비게이션 */
.params-tabs {
  display: flex; gap: 0;
  border-bottom: 2px solid var(--border-color);
  padding: 0 var(--spacing-md); flex-shrink: 0;
}
.params-tab {
  flex: 1; padding: 10px 0; border: none; background: none; cursor: pointer;
  font-size: var(--font-size-sm); font-weight: 500;
  color: var(--text-muted); position: relative;
  transition: color .2s;
}
.params-tab:hover { color: var(--text-secondary); }
.params-tab--active { color: var(--text-primary); font-weight: 600; }
.params-tab--active::after {
  content: ''; position: absolute; bottom: -2px; left: 10%; right: 10%;
  height: 2px; background: var(--gemini-gradient); border-radius: 1px;
}
.params-tab-content { padding-top: var(--spacing-sm); }
.params-tab-empty {
  text-align: center; color: var(--text-muted);
  font-size: var(--font-size-sm); padding: var(--spacing-xl) 0;
}

.params-body {
  flex: 1; overflow-y: auto;
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
}
.params-body::-webkit-scrollbar { width: 4px; }
.params-body::-webkit-scrollbar-thumb {
  background-color: var(--border-color); border-radius: var(--border-radius-pill);
}

.params-empty { padding: var(--spacing-xl) 0; text-align: center; color: var(--text-muted); font-size: var(--font-size-sm); }

.params-download-wrapper {
  padding: var(--spacing-sm) 0; text-align: center;
}
.params-download-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; font-size: 12px; font-weight: 500;
  color: #8ab4f8; background: rgba(138, 180, 248, 0.1);
  border: 1px solid rgba(138, 180, 248, 0.25);
  border-radius: 6px; cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.params-download-btn:hover {
  background: rgba(138, 180, 248, 0.2);
  border-color: rgba(138, 180, 248, 0.5);
}
.params-download-btn:active {
  background: rgba(138, 180, 248, 0.3);
}

.params-section { margin-bottom: var(--spacing-lg); }
.params-section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--spacing-sm) 0 var(--spacing-xs);
}
.params-section-title {
  font-size: var(--font-size-xs); font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: var(--text-muted);
  margin: 0;
}
.params-copy-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px; font-size: 11px; font-family: inherit;
  color: var(--text-muted); background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 4px; cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
}
.params-copy-btn:hover {
  color: var(--text-primary); border-color: var(--text-muted);
  background: var(--bg-chip);
}
.params-copy-btn--copied {
  color: #81c995; border-color: #81c995;
}

/* 테이블 기반 파라미터 표시 */
.params-table {
  width: 100%; border-collapse: collapse;
  font-size: var(--font-size-sm);
}
.params-table thead th {
  font-size: var(--font-size-xs); font-weight: 600;
  color: var(--text-muted); text-align: left;
  padding: 6px 8px; border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}
.params-table thead th:nth-child(2) { text-align: right; }
.params-table thead th:nth-child(3) { text-align: left; padding-left: 6px; }

.params-table tbody tr {
  border-bottom: 1px solid var(--border-color);
  transition: background-color .15s;
}
.params-table tbody tr:hover { background-color: var(--bg-chip); }
.params-table tbody tr:last-child { border-bottom: none; }

.param-td-name {
  padding: 7px 8px; color: var(--text-secondary);
  white-space: nowrap; font-weight: 500;
}
.param-td-value {
  padding: 7px 8px; text-align: right;
  font-weight: 600; color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}
.param-td-unit {
  padding: 7px 4px 7px 6px; color: var(--text-muted);
  font-size: var(--font-size-xs); white-space: nowrap;
  min-width: 36px;
}

/* 미수집 행 */
.param-row--missing { opacity: .4; }
.param-row--missing .param-td-value { font-weight: 400; }
.param-missing-badge { color: var(--text-muted); }

/* rationale 툴팁 힌트 */
.param-row--has-tip { cursor: help; }
.param-row--has-tip .param-td-name::after {
  content: ' \24D8'; font-size: 10px; color: var(--text-muted); vertical-align: super;
}

/* 참조 열 */
.params-table thead th:nth-child(4) {
  text-align: center; width: 36px; padding: 6px 4px;
}
.param-td-ref {
  padding: 4px; text-align: center; width: 36px;
}
.param-ref-btn {
  background: none; border: 1px solid var(--border-color);
  border-radius: 4px; cursor: pointer; font-size: 13px;
  padding: 2px 5px; line-height: 1;
  color: var(--gemini-blue, #8ab4f8);
  opacity: .85; transition: opacity .15s, border-color .15s, background .15s;
}
.param-ref-btn:hover {
  opacity: 1; border-color: var(--gemini-blue, #8ab4f8);
  background: rgba(138, 180, 248, .1);
}

/* 참조 팝업 */
.param-ref-popup {
  position: fixed; z-index: 9999;
  width: 340px; max-height: 400px; overflow-y: auto;
  background: var(--bg-secondary, #1e1e1e);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,.4);
  font-size: var(--font-size-sm);
  animation: refPopupIn .15s ease-out;
}
@keyframes refPopupIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.param-ref-popup-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  color: var(--gemini-blue, #8ab4f8);
}
.param-ref-popup-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 14px; cursor: pointer; padding: 2px 4px; line-height: 1;
}
.param-ref-popup-close:hover { color: var(--text-primary); }
.param-ref-popup-body {
  padding: 10px 14px; color: var(--text-secondary);
  line-height: 1.55; white-space: pre-wrap;
  font-size: var(--font-size-xs);
}
.param-ref-popup-sources {
  padding: 8px 14px 12px; border-top: 1px solid var(--border-color);
}
.param-ref-popup-src-label {
  display: block; font-size: 11px; font-weight: 600;
  color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase;
  letter-spacing: .5px;
}
.param-ref-popup-src-item {
  padding: 4px 8px; margin-top: 3px;
  background: var(--bg-chip, rgba(255,255,255,.06));
  border-radius: 4px; font-size: var(--font-size-xs);
  color: var(--text-primary);
}
.param-ref-popup-src-content {
  margin-top: 6px; padding: 8px 10px;
  background: var(--bg-chip, rgba(255,255,255,.06));
  border-radius: 6px; border-left: 3px solid var(--gemini-blue, #8ab4f8);
  font-size: var(--font-size-xs); color: var(--text-secondary);
  line-height: 1.5; white-space: pre-wrap;
  max-height: 200px; overflow-y: auto;
}

/* 설계 출력 섹션 강조 */
.params-section--highlight .params-table tbody tr:not(.param-row--missing) .param-td-value {
  color: var(--gemini-blue, #8ab4f8);
}

/* 에러 팝업 */
.error-popup-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,.6); display: flex;
  align-items: center; justify-content: center;
  animation: fadeIn .15s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}
.error-popup {
  width: 460px; max-width: 90vw; max-height: 80vh;
  background: var(--bg-secondary, #1e1e1e);
  border: 1px solid #e53935; border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
  overflow: hidden; display: flex; flex-direction: column;
}
.error-popup-header {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 16px; font-weight: 700; font-size: 15px;
  background: rgba(229,57,53,.15); color: #ff6b6b;
  border-bottom: 1px solid rgba(229,57,53,.3);
}
.error-popup-icon { font-size: 18px; }
.error-popup-close {
  margin-left: auto; background: none; border: none;
  color: var(--text-muted); font-size: 16px; cursor: pointer;
  padding: 2px 6px;
}
.error-popup-close:hover { color: var(--text-primary); }
.error-popup-body {
  padding: 14px 16px; font-size: 12px; font-family: monospace;
  color: var(--text-secondary); line-height: 1.6;
  overflow-y: auto; max-height: 300px; white-space: pre-wrap;
  word-break: break-all;
}
.error-popup-footer {
  display: flex; gap: 8px; padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  justify-content: flex-end;
}
.error-popup-copy {
  padding: 6px 14px; border-radius: 6px; font-size: 13px;
  background: rgba(229,57,53,.2); color: #ff6b6b;
  border: 1px solid rgba(229,57,53,.4); cursor: pointer;
  font-weight: 600;
}
.error-popup-copy:hover { background: rgba(229,57,53,.3); }
.error-popup-dismiss {
  padding: 6px 14px; border-radius: 6px; font-size: 13px;
  background: var(--bg-chip); color: var(--text-secondary);
  border: 1px solid var(--border-color); cursor: pointer;
}
.error-popup-dismiss:hover { background: var(--border-color); }

/* 엔진 설계표 블록 (개선안 2: LLM 경유 X) */
.design-table-block {
  margin-top: var(--spacing-lg);
  border: 1px solid rgba(129, 201, 149, 0.3);
  border-radius: var(--border-radius-sm);
  background: rgba(129, 201, 149, 0.05);
  overflow: hidden;
}
.design-table-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  background: rgba(129, 201, 149, 0.1);
  font-size: var(--font-size-xs); font-weight: 600;
  color: #81c995; letter-spacing: .03em;
}
.design-table-badge {
  display: inline-block; padding: 1px 6px;
  font-size: 10px; font-weight: 700;
  background: #81c995; color: #1e1f20;
  border-radius: 3px; letter-spacing: .05em;
}
.design-table-content {
  padding: 12px;
}
.design-table-content table {
  width: 100%; border-collapse: collapse; font-size: var(--font-size-sm);
}
.design-table-content th {
  text-align: left; padding: 6px 8px;
  border-bottom: 1px solid rgba(129, 201, 149, 0.3);
  color: var(--text-muted); font-weight: 600; font-size: 11px;
}
.design-table-content td {
  padding: 5px 8px; border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}
.design-table-content td:nth-child(3) {
  color: #81c995; font-weight: 600;
}

/* ── 응력 해석 결과 박스 (Milli-Analyze) ── */
.stress-analysis-block {
  margin-top: var(--spacing-lg);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}
.stress-analysis-block--pass {
  border: 1px solid rgba(52, 168, 83, .4);
  background: rgba(52, 168, 83, .05);
}
.stress-analysis-block--fail {
  border: 1px solid rgba(234, 67, 53, .4);
  background: rgba(234, 67, 53, .05);
}
.stress-analysis-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  font-size: var(--font-size-xs); font-weight: 600;
  letter-spacing: .03em;
}
.stress-analysis-block--pass .stress-analysis-header { background: rgba(52, 168, 83, .1); color: #34a853; }
.stress-analysis-block--fail .stress-analysis-header { background: rgba(234, 67, 53, .1); color: #ea4335; }
.stress-analysis-badge {
  display: inline-block; padding: 2px 8px;
  font-size: 10px; font-weight: 700;
  border-radius: 3px; letter-spacing: .08em;
}
.stress-analysis-block--pass .stress-analysis-badge { background: #34a853; color: #fff; }
.stress-analysis-block--fail .stress-analysis-badge { background: #ea4335; color: #fff; }
.stress-analysis-agent {
  margin-left: auto;
  font-size: 10px; font-weight: 400;
  color: var(--text-muted); opacity: .7;
}
.stress-analysis-sf {
  display: flex; align-items: baseline; gap: 8px;
  padding: 12px 16px 8px;
}
.stress-analysis-sf-label {
  font-size: var(--font-size-xs); color: var(--text-muted);
}
.stress-analysis-sf-value {
  font-size: 32px; font-weight: 700; line-height: 1;
}
.stress-analysis-block--pass .stress-analysis-sf-value { color: #34a853; }
.stress-analysis-block--fail .stress-analysis-sf-value { color: #ea4335; }
.stress-analysis-sf-req {
  font-size: var(--font-size-xs); color: var(--text-muted);
}
.stress-analysis-details {
  padding: 0 16px 8px;
}
.stress-analysis-details table {
  width: 100%; border-collapse: collapse; font-size: var(--font-size-xs);
}
.stress-analysis-details td {
  padding: 3px 0; color: var(--text-secondary);
}
.stress-analysis-details td:first-child {
  color: var(--text-muted); width: 100px;
}
.stress-analysis-details td:last-child {
  text-align: right; font-variant-numeric: tabular-nums;
}
.stress-analysis-section {
  padding: 4px 16px 8px;
}
.stress-analysis-section-title {
  font-size: 11px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: 4px; padding-top: 6px;
  border-top: 1px solid rgba(255,255,255,.06);
}
.stress-analysis-section:first-of-type .stress-analysis-section-title {
  border-top: none;
}
.stress-analysis-section table {
  width: 100%; border-collapse: collapse; font-size: var(--font-size-xs);
}
.stress-analysis-section td {
  padding: 3px 0; color: var(--text-secondary);
}
.stress-analysis-section td:first-child {
  color: var(--text-muted); width: 110px;
}
.stress-analysis-section td:last-child {
  text-align: right; font-variant-numeric: tabular-nums;
}
.stress-analysis-separator td {
  padding: 2px 0; border-bottom: 1px dashed rgba(255,255,255,.08);
}
.stress-analysis-highlight td {
  padding-top: 4px;
}
.stress-analysis-block--pass .stress-analysis-highlight td { color: #34a853; }
.stress-analysis-block--fail .stress-analysis-highlight td { color: #ea4335; }
.stress-analysis-changes {
  padding: 8px 16px; margin: 0 12px 4px;
  background: rgba(242, 153, 0, .08);
  border-left: 3px solid #f29900;
  border-radius: 4px;
  font-size: var(--font-size-xs); color: var(--text-secondary);
}
.stress-analysis-change-item {
  margin-top: 2px; padding-left: 4px;
}
.stress-analysis-model {
  padding: 6px 16px 8px;
  font-size: 10px; color: var(--text-muted); opacity: .6;
  text-align: right;
}
.stress-analysis-notes {
  padding: 8px 16px; margin: 0 12px 8px;
  background: rgba(255,255,255,.04);
  border-radius: 4px;
  font-size: var(--font-size-xs); color: var(--text-secondary);
  font-style: italic;
}
.stress-analysis-recs {
  padding: 8px 16px 12px;
  font-size: var(--font-size-xs); color: var(--text-secondary);
}
.stress-analysis-rec-item {
  margin-top: 4px; padding-left: 8px;
  border-left: 2px solid #ea4335;
}
.stress-analysis-rec-item .rec-param {
  font-weight: 600; color: var(--text-primary);
}

/* Thinking 진행 블록 (자세히 펼침) */
.thinking-block {
  margin-bottom: 10px;
  border: 1px solid rgba(138, 180, 248, .2);
  border-radius: var(--border-radius-sm);
  background: rgba(138, 180, 248, .04);
  overflow: hidden;
  font-size: var(--font-size-xs);
}
.thinking-summary {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  color: var(--text-secondary);
  user-select: none;
  list-style: none;
}
.thinking-summary::-webkit-details-marker { display: none; }
.thinking-summary::marker { content: ''; }
.thinking-current {
  flex: 1;
  font-size: var(--font-size-xs);
  color: #8ab4f8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.thinking-spinner {
  display: inline-block;
  width: 12px; height: 12px;
  border: 2px solid rgba(138, 180, 248, .3);
  border-top-color: #8ab4f8;
  border-radius: 50%;
  animation: thinking-spin .8s linear infinite;
}
@keyframes thinking-spin { to { transform: rotate(360deg); } }
.thinking-done-icon { font-size: 13px; }
.thinking-steps {
  padding: 4px 12px 8px;
  border-top: 1px solid rgba(138, 180, 248, .1);
}
.thinking-step {
  display: flex; align-items: center; gap: 6px;
  padding: 3px 0;
  color: var(--text-muted);
}
.thinking-step--running { color: #8ab4f8; }
.thinking-step--done { color: var(--text-secondary); }
.thinking-step--error { color: #ea4335; }
.thinking-step--info { color: var(--text-muted); }
.thinking-step-icon { font-size: 12px; flex-shrink: 0; }
.thinking-step-text { line-height: 1.4; }

/* 도면 로딩 */
.drawing-loader {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  margin-top: var(--spacing-lg); padding: 20px 16px;
  border: 1px solid rgba(66, 133, 244, .3);
  border-radius: var(--border-radius-sm);
  background: rgba(66, 133, 244, .05);
}
.drawing-loader-gif {
  width: 120px; height: auto;
}
.drawing-log-container {
  width: 100%; max-height: 120px; overflow-y: auto;
  margin-top: 8px; padding: 6px 8px;
  background: rgba(0,0,0,.2); border-radius: 4px;
  font-family: monospace; font-size: 11px;
}
.drawing-log-line {
  color: var(--text-muted); line-height: 1.6;
  animation: logFadeIn .2s ease-out;
}
.drawing-log-line:last-child {
  color: #8ab4f8;
}
@keyframes logFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.drawing-loader-text {
  font-size: var(--font-size-sm); font-weight: 600; color: #4285f4;
}
.drawing-loader-text--dim {
  color: var(--text-muted); font-weight: 400;
}

/* 도면 결과 */
.drawing-result {
  margin-top: var(--spacing-lg);
  border: 1px solid rgba(66, 133, 244, .3);
  border-radius: var(--border-radius-sm);
  background: rgba(66, 133, 244, .05);
  overflow: hidden;
}
.drawing-result-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  background: rgba(66, 133, 244, .1);
  font-size: var(--font-size-xs); font-weight: 600;
  color: #8ab4f8; letter-spacing: .03em;
}
.drawing-result-badge {
  display: inline-block; padding: 1px 6px;
  font-size: 10px; font-weight: 700;
  background: #4285f4; color: #fff;
  border-radius: 3px; letter-spacing: .05em;
}
/* 3종 도면 색상 분기 */
.drawing-result--detail { border-color: rgba(66, 133, 244, .3); }
.drawing-result--detail .drawing-result-header { background: rgba(66, 133, 244, .1); color: #8ab4f8; }
.drawing-result--detail .drawing-result-badge { background: #4285f4; }

.drawing-result--bearing { border-color: rgba(155, 114, 203, .3); background: rgba(155, 114, 203, .05); }
.drawing-result--bearing .drawing-result-header { background: rgba(155, 114, 203, .1); color: #c4a8e8; }
.drawing-result--bearing .drawing-result-badge { background: #9b72cb; }

.drawing-result--assembly { border-color: rgba(242, 153, 0, .3); background: rgba(242, 153, 0, .05); }
.drawing-result--assembly .drawing-result-header { background: rgba(242, 153, 0, .1); color: #f5c36a; }
.drawing-result--assembly .drawing-result-badge { background: #f29900; }

.drawing-result-preview {
  width: 100%; max-height: 500px; object-fit: contain;
  padding: 12px; background: #fff;
}
.drawing-result-placeholder {
  padding: 24px; text-align: center;
  color: var(--text-muted); font-size: var(--font-size-sm);
}
.drawing-result-debug {
  padding: 14px 16px; font-size: 12px;
}
.drawing-debug-header {
  font-weight: 700; color: #ff6b6b; margin-bottom: 8px;
}
.drawing-debug-row {
  color: var(--text-secondary); line-height: 1.8;
}
.drawing-debug-label {
  display: inline-block; min-width: 80px;
  font-family: monospace; color: var(--text-muted); font-weight: 600;
}
.drawing-debug-details {
  margin-top: 8px;
}
.drawing-debug-details summary {
  cursor: pointer; color: var(--text-muted); font-size: 11px;
}
.drawing-debug-details pre {
  margin-top: 6px; padding: 8px; font-size: 11px;
  background: rgba(0,0,0,.2); border-radius: 4px;
  color: var(--text-secondary); max-height: 200px;
  overflow-y: auto; white-space: pre-wrap; word-break: break-all;
}
/* DXF 별도 글상자 */
.drawing-result--dxf {
  margin-top: 8px;
  border-color: rgba(129, 201, 149, .3);
  background: rgba(129, 201, 149, .05);
}
.drawing-result-header--dxf {
  background: rgba(129, 201, 149, .1);
  color: #81c995;
}
.drawing-result-badge--dxf {
  background: #81c995; color: #1e1f20;
}
.drawing-download-btn--dxf {
  background: rgba(129, 201, 149, .15);
  color: #81c995;
  border-color: rgba(129, 201, 149, .3);
}
.drawing-download-btn--dxf:hover {
  background: rgba(129, 201, 149, .25);
}
/* BOM 부품 목록 */
.drawing-result--bom {
  margin-top: 8px;
  border-color: rgba(255, 167, 38, .3);
  background: rgba(255, 167, 38, .05);
}
.drawing-result-header--bom {
  background: rgba(255, 167, 38, .1);
  color: #ffa726;
}
.drawing-result-badge--bom {
  background: #ffa726; color: #1e1f20;
}
.bom-table {
  width: 100%; border-collapse: collapse;
  font-size: var(--font-size-sm); padding: 8px 12px;
}
.bom-table th {
  text-align: left; padding: 6px 8px;
  border-bottom: 1px solid rgba(255, 167, 38, .3);
  color: var(--text-muted); font-size: 11px; font-weight: 600;
}
.bom-table td {
  padding: 5px 8px; border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}
/* 3D 모델 별도 글상자 */
.drawing-result--3d {
  margin-top: 8px;
  border-color: rgba(186, 139, 255, .3);
  background: rgba(186, 139, 255, .05);
}
.drawing-result--3d .drawing-result-header--3d {
  background: rgba(186, 139, 255, .1);
  color: #ba8bff;
}
.drawing-result-badge--3d {
  background: #ba8bff; color: #1e1f20;
}
.drawing-download-btn--3d {
  background: rgba(186, 139, 255, .15);
  color: #ba8bff;
  border-color: rgba(186, 139, 255, .3);
}
.drawing-download-btn--3d:hover {
  background: rgba(186, 139, 255, .25);
}

.drawing-result-actions {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 10px 12px; border-top: 1px solid rgba(66, 133, 244, .2);
}
.drawing-download-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 14px; border-radius: 6px; font-size: 13px;
  background: rgba(66, 133, 244, .15); color: #8ab4f8;
  border: 1px solid rgba(66, 133, 244, .3);
  text-decoration: none; font-weight: 600; cursor: pointer;
  transition: background .15s;
}
.drawing-download-btn:hover {
  background: rgba(66, 133, 244, .25);
}
.drawing-result-id {
  font-size: var(--font-size-xs); color: var(--text-muted);
  align-self: center;
}

/* ----------------------------------------------------------
   14. 인라인 인용 주석 (Citation)
   ---------------------------------------------------------- */

/* 인라인 주석 마커 (상첨자 번호) */
.cite-mark {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 16px; height: 16px; padding: 0 3px;
  font-size: 10px; font-weight: 700; line-height: 1;
  color: #8ab4f8; background: rgba(138, 180, 248, 0.15);
  border-radius: 3px; cursor: pointer;
  vertical-align: super; margin: 0 1px;
  transition: background 0.15s, color 0.15s;
}
.cite-mark:hover {
  background: rgba(138, 180, 248, 0.35); color: #fff;
}

/* 인용 팝업 */
.cite-popup {
  position: absolute; z-index: 100;
  width: min(380px, calc(100% - 16px));
  background: #2a2b2d; border: 1px solid rgba(138, 180, 248, 0.3);
  border-radius: 8px; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  font-size: 13px; animation: citePopIn 0.15s ease;
}
@keyframes citePopIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.cite-popup-header {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.cite-popup-title {
  font-weight: 600; color: #8ab4f8; flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.cite-popup-section {
  font-size: 11px; color: var(--text-muted); flex-shrink: 0;
}
.cite-popup-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 18px; cursor: pointer; padding: 0 2px; line-height: 1;
}
.cite-popup-close:hover { color: var(--text-primary); }
.cite-popup-body {
  padding: 10px 12px; color: var(--text-secondary);
  max-height: 200px; overflow-y: auto; line-height: 1.5;
  white-space: pre-wrap; word-break: break-word;
}
.cite-popup-body::-webkit-scrollbar { width: 4px; }
.cite-popup-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15); border-radius: 2px;
}

/* 참고자료 섹션 (메시지 하단) */
.cite-references {
  margin-top: 12px; border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 4px;
}
.cite-references-toggle {
  background: none; border: none; color: var(--text-muted);
  font-size: 12px; cursor: pointer; padding: 4px 0;
  display: flex; align-items: center; gap: 4px;
}
.cite-references-toggle::before {
  content: '▸'; display: inline-block;
  transition: transform 0.15s;
}
.cite-references--open .cite-references-toggle::before {
  transform: rotate(90deg);
}
.cite-references-toggle:hover { color: var(--text-secondary); }
.cite-references-list {
  display: none; margin-top: 4px;
}
.cite-references--open .cite-references-list { display: block; }
.cite-ref-item {
  padding: 8px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.cite-ref-item:last-child { border-bottom: none; }
.cite-ref-header {
  font-size: 12px; color: var(--text-secondary); margin-bottom: 4px;
}
.cite-ref-num { color: #8ab4f8; font-weight: 600; }
.cite-ref-source { font-weight: 500; color: var(--text-primary); }
.cite-ref-section { color: var(--text-muted); }
.cite-ref-score {
  font-size: 10px; color: var(--text-muted);
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 5px; border-radius: 3px; margin-left: 4px;
}
.cite-ref-body {
  font-size: 12px; color: var(--text-muted); line-height: 1.5;
  max-height: 80px; overflow: hidden; position: relative;
  white-space: pre-wrap; word-break: break-word;
}
.cite-ref-body::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 24px; background: linear-gradient(transparent, var(--bg-chat));
  pointer-events: none;
}

/* ----------------------------------------------------------
   15. 로그인 모달
   ---------------------------------------------------------- */
.modal-overlay {
  position: fixed; inset: 0; background-color: var(--bg-modal);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: var(--spacing-md); backdrop-filter: blur(6px);
}
.modal-overlay[aria-hidden="true"] { display: none; }

.modal-box {
  background-color: var(--bg-modal-box);
  border-radius: var(--border-radius-lg); padding: var(--spacing-xl);
  width: 100%; max-width: 400px; box-shadow: var(--shadow-modal);
  animation: modalIn .2s ease; border: 1px solid var(--border-color);
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(.96) translateY(-8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-brand { display: flex; align-items: center; gap: 10px; margin-bottom: var(--spacing-lg); }
.modal-brand-icon { width: 30px; height: 30px; }
.modal-brand-name { font-size: var(--font-size-lg); font-weight: 600; color: var(--text-primary); }
.modal-title { font-size: var(--font-size-xl); font-weight: 500; color: var(--text-primary); margin-bottom: var(--spacing-sm); }
.modal-desc { font-size: var(--font-size-sm); color: var(--text-secondary); margin-bottom: var(--spacing-lg); }

.form-group { margin-bottom: var(--spacing-md); }
.form-group label { display: block; font-size: var(--font-size-sm); font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.form-group input {
  width: 100%; padding: 11px var(--spacing-md);
  font-family: inherit; font-size: var(--font-size-base);
  color: var(--text-primary); background-color: var(--bg-app);
  border: 1px solid var(--border-input); border-radius: var(--border-radius-sm); outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(138,180,248,.18);
}

.form-error { font-size: var(--font-size-sm); color: #f28b82; min-height: 20px; margin-bottom: var(--spacing-sm); }

/* ----------------------------------------------------------
   15. 토스트
   ---------------------------------------------------------- */
.toast-container {
  position: fixed; bottom: var(--spacing-lg); left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
  gap: var(--spacing-sm); z-index: 2000; pointer-events: none;
}
.toast {
  background-color: #444746; color: #e3e3e3;
  padding: 10px 20px; border-radius: var(--border-radius-pill);
  font-size: var(--font-size-sm); box-shadow: var(--shadow-md);
  animation: toastIn .2s ease; max-width: 360px;
  pointer-events: auto; text-align: center;
}
.toast--error   { background-color: #8c1d18; color: #f9dedc; }
.toast--success { background-color: #0d6832; color: #c4eed0; }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ----------------------------------------------------------
   16. 메시지 푸터 & 복사 버튼
   ---------------------------------------------------------- */
.message-footer {
  display: flex; align-items: center; gap: 8px;
  margin-top: 4px; min-height: 20px;
}
.message-footer .msg-copy-btn {
  opacity: 0; transition: opacity .15s, color .15s, background-color .15s;
}
.message:hover .message-footer .msg-copy-btn { opacity: 1; }
.msg-copy-btn {
  background: transparent; border: none; cursor: pointer;
  color: var(--text-muted); padding: 2px 4px;
  border-radius: var(--border-radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.msg-copy-btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-chip-hover);
}
.msg-copy-btn--copied { color: #81c995; opacity: 1 !important; }
.msg-copy-btn--copied:hover { color: #81c995; }

/* ----------------------------------------------------------
   17. 반응형
   ---------------------------------------------------------- */
@media (max-width: 767px) {
  .sidebar {
    position: fixed; left: 0; top: 0; height: 100vh;
  }
  .sidebar:not(.sidebar--collapsed) {
    box-shadow: var(--shadow-modal);
  }
  .sidebar-overlay--visible { display: block; }

  .chat-main {
    margin-left: 52px;
  }

  .params-panel {
    position: fixed; right: 0; top: 0; height: 100vh;
    width: 0; transform: translateX(100%); z-index: 300; box-shadow: var(--shadow-modal);
  }
  .params-panel--open { width: min(var(--params-panel-width), 100vw); transform: translateX(0); }

  .message-body { max-width: 88%; }
  .user-info { display: none; }
  .welcome-greeting { font-size: var(--font-size-xl); }
  .welcome-subtitle { font-size: var(--font-size-2xl); }
  .header-session-title { display: none; }
}

@media (max-width: 479px) {
  .chat-messages { padding: var(--spacing-md) var(--spacing-sm); }
  .chat-input-area { padding: var(--spacing-sm); }
  .message-body { max-width: 92%; }
}

/* 애니메이션 감소 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .message-bubble--streaming::after { animation: none; }
}

/* ----------------------------------------------------------
   18. 설정 메뉴
   ---------------------------------------------------------- */
.settings-menu {
  position: fixed; z-index: 500;
  background-color: var(--bg-modal-box);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  padding: 4px 0; min-width: 200px;
}

.settings-menu-item {
  display: flex; align-items: center; gap: 12px;
  width: 100%; padding: 10px 16px;
  background: transparent; border: none; cursor: pointer;
  color: var(--text-primary); font-size: var(--font-size-sm);
  font-family: inherit; text-align: left;
  transition: background-color var(--transition);
  position: relative;
}
.settings-menu-item:hover { background-color: var(--bg-sidebar-hover); }
.settings-menu-item svg:first-child { flex-shrink: 0; }
.settings-menu-arrow { margin-left: auto; flex-shrink: 0; }

/* 테마 서브메뉴 */
.settings-submenu {
  display: none; position: absolute;
  left: 100%; top: -4px;
  background-color: var(--bg-modal-box);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  padding: 4px 0; min-width: 140px;
  z-index: 510;
}
.settings-menu-item--has-sub:hover > .settings-submenu { display: block; }

.settings-submenu-item {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 10px 16px;
  background: transparent; border: none; cursor: pointer;
  color: var(--text-primary); font-size: var(--font-size-sm);
  font-family: inherit; text-align: left;
  transition: background-color var(--transition);
}
.settings-submenu-item:hover { background-color: var(--bg-sidebar-hover); }
.settings-submenu-item svg { color: var(--color-primary); }

/* ----------------------------------------------------------
   19. 의견 보내기 패널
   ---------------------------------------------------------- */
.feedback-panel {
  position: fixed; right: 0; top: 0; height: 100vh;
  width: 380px; background-color: var(--bg-modal-box);
  border-left: 1px solid var(--border-color);
  display: flex; flex-direction: column;
  z-index: 400;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  box-shadow: var(--shadow-modal);
  pointer-events: none;
}
.feedback-panel--open { transform: translateX(0); pointer-events: auto; }

.feedback-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}
.feedback-panel-title {
  font-size: var(--font-size-md); font-weight: 600;
  color: var(--text-primary);
}

.feedback-panel-body {
  flex: 1; overflow-y: auto;
  padding: var(--spacing-lg);
}
.feedback-label {
  display: block; font-size: var(--font-size-sm); font-weight: 500;
  color: var(--text-primary); margin-bottom: var(--spacing-sm);
}
.feedback-textarea {
  width: 100%; min-height: 100px; padding: var(--spacing-md);
  font-family: inherit; font-size: var(--font-size-sm);
  color: var(--text-primary); background-color: var(--bg-app);
  border: 1px solid var(--border-input);
  border-radius: var(--border-radius-sm);
  resize: vertical; outline: none;
  margin-bottom: var(--spacing-sm);
}
.feedback-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(138,180,248,.18);
}
.feedback-warning {
  font-size: var(--font-size-xs); color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}
.feedback-desc {
  font-size: var(--font-size-sm); color: var(--text-secondary);
  margin-bottom: var(--spacing-md); line-height: 1.5;
}
.feedback-screenshot-preview {
  background-color: var(--bg-chip);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-lg);
  text-align: center; margin-bottom: var(--spacing-md);
  min-height: 120px;
  display: flex; align-items: center; justify-content: center;
}
.feedback-screenshot-preview p {
  color: var(--text-muted); font-size: var(--font-size-sm);
}
.feedback-screenshot-preview img {
  width: 100%; border-radius: 8px;
}
.feedback-screenshot-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 10px;
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: inherit; font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background-color var(--transition);
}
.feedback-screenshot-btn:hover { background-color: var(--bg-sidebar-hover); }

.feedback-panel-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  display: flex; justify-content: flex-end;
  flex-shrink: 0;
}

@media (max-width: 767px) {
  .feedback-panel { width: 100%; }
}

/* ----------------------------------------------------------
   20. 라이트 테마
   ---------------------------------------------------------- */
body[data-theme="light"] {
  --bg-app:            #ffffff;
  --bg-sidebar:        #f0f4f9;
  --bg-sidebar-hover:  #dde3ea;
  --bg-sidebar-active: rgba(26, 115, 232, 0.12);
  --bg-chat:           #ffffff;
  --bg-header:         #ffffff;
  --bg-input-wrapper:  #f0f4f9;
  --bg-user-message:   #d3e3fd;
  --bg-modal:          rgba(0, 0, 0, 0.32);
  --bg-modal-box:      #ffffff;
  --bg-params:         #f8f9fa;
  --bg-chip:           #e8eaed;
  --bg-chip-hover:     #dadce0;
  --bg-code:           #f0f4f9;

  --text-primary:        #1f1f1f;
  --text-secondary:      #444746;
  --text-muted:          #70757a;
  --text-inverse:        #ffffff;
  --text-sidebar:        #1f1f1f;
  --text-sidebar-muted:  #70757a;
  --text-user:           #1f1f1f;
  --text-link:           #1a73e8;

  --color-primary:           #1a73e8;
  --color-primary-hover:     #1557b0;
  --color-on-primary:        #ffffff;
  --color-primary-container: #d3e3fd;

  --border-color:       #dadce0;
  --border-input:       #c4c7c5;

  --shadow-sm:    0 1px 2px rgba(0,0,0,.08);
  --shadow-md:    0 2px 8px rgba(0,0,0,.12);
  --shadow-input: 0 1px 3px rgba(0,0,0,.08);
  --shadow-modal: 0 8px 32px rgba(0,0,0,.12);
}
body[data-theme="light"] .session-context-menu { background-color: #ffffff; }
body[data-theme="light"] .toast { background-color: #323232; color: #ffffff; }
body[data-theme="light"] .toast--error { background-color: #d93025; color: #ffffff; }
body[data-theme="light"] .toast--success { background-color: #188038; color: #ffffff; }
body[data-theme="light"] .message--user .message-bubble code { background-color: rgba(0,0,0,.08); }
body[data-theme="light"] .feedback-textarea:focus {
  box-shadow: 0 0 0 2px rgba(26,115,232,.18);
}

/* ----------------------------------------------------------
   21. 아바타 프로필 메뉴
   ---------------------------------------------------------- */
.avatar-menu {
  position: fixed; z-index: 500;
  background-color: var(--bg-modal-box);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  min-width: 200px;
  overflow: hidden;
}
.avatar-menu-info {
  display: flex; flex-direction: column;
  padding: 14px 16px 10px;
}
.avatar-menu-nickname {
  font-size: var(--font-size-md); font-weight: 600;
  color: var(--text-primary);
}
.avatar-menu-email {
  font-size: var(--font-size-xs); color: var(--text-muted);
  margin-top: 2px;
}
.avatar-menu-separator {
  height: 1px; background-color: var(--border-color);
  margin: 0;
}
.avatar-menu-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 10px 16px;
  background: transparent; border: none; cursor: pointer;
  color: var(--text-primary); font-size: var(--font-size-sm);
  font-family: inherit; text-align: left;
  transition: background-color var(--transition);
}
.avatar-menu-item:hover { background-color: var(--bg-sidebar-hover); }