/* Header title margin adjustment */
[dir=ltr] .md-header__title {
  margin-left: 0rem;
}

/* ===== Footer (Copyright 영역) 높이 조정 ===== */
.md-footer-meta {
  padding: 0rem 0;
}

.md-footer-meta__inner {
  padding: 0.8rem 0.8rem;
}

.md-copyright {
  padding: 0.6rem 0;
  font-size: 0.7rem;
}

.md-copyright__links {
  margin-top: 0.25rem;
  font-size: 0.7rem;
}

.md-copyright__links a {
  color: var(--md-footer-fg-color--lighter);
  text-decoration: none;
}

.md-copyright__links a:hover {
  color: var(--md-footer-fg-color);
  text-decoration: underline;
}

.md-copyright__separator {
  margin: 0 0.4rem;
  color: var(--md-footer-fg-color--lighter);
}

/* ===== Hero Learn More 버튼 + 화살표 ===== */
.mdx-hero__learn-more {
  display: inline-flex !important;
  align-items: center;
  white-space: nowrap;
}

.mdx-hero__more-arrow {
  fill: currentColor;
  height: 1.6rem;
  width: 1.6rem;
  margin-left: 0.3rem;
  vertical-align: middle;
  stroke: currentColor;
  stroke-width: 1px;
  animation: bounce 2s cubic-bezier(.4,0,.2,1) infinite;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.5));
  transform: translateY(10px);
}

/* 모바일에서 버튼 한 줄 유지 */
@media screen and (max-width: 44.984375em) {
  .mdx-hero__teaser .md-button {
    padding: 0.6em 1.2em;
    font-size: 0.8rem;
    margin-right: 0.3rem;
  }
  .mdx-hero__more-arrow {
    height: 1.2rem;
    width: 1.2rem;
    margin-left: 0.2rem;
  }
  .mdx-hero__inner {
    bottom: 10rem;
  }
}

/* 태블릿/PC에서 히어로 박스 더 위로 */
@media screen and (min-width: 44.984375em) {
  .mdx-hero__inner {
    bottom: 5rem;
  }
}

/* 모바일 가로 스크롤 방지 */
html, body {
  overflow-x: hidden;
}

/* 홈페이지 pull-to-refresh 활성화 */
.mdx-parallax {
  overscroll-behavior-y: auto;
}

/* ===== 레이아웃 확장 및 큰 화면 대응 ===== */
/* 컨텐츠 영역 확장 */
.md-grid {
  max-width: 100rem;
}

/* 큰 화면에서 기본 폰트 크기 증가 */
@media screen and (min-width: 100em) {
  html {
    font-size: 150%
  }
}

@media screen and (min-width: 125em) {
  html {
    font-size: 150%
  }
}

/* ===== Header Layout ===== */
.md-header__inner {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.md-header__spacer {
  flex-grow: 1;
}

/* ===== Header (Simulator) ===== */
.md-header__cloud {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 2.4rem;
  margin-left: 0.4rem;
  padding: 0 0.4rem;
  font-size: 0.7rem;
  white-space: nowrap;
  color: currentColor;
  outline-color: var(--md-accent-fg-color);
  transition: opacity 250ms;
}

.md-header__cloud:hover {
  opacity: 0.7;
}

.md-header__cloud > svg {
  width: 1.2rem;
  height: 1.2rem;
  fill: currentColor;
}

.md-header__cloud-label {
  margin-left: 0.4rem;
  font-weight: 700;
}

/* Simulator를 drawer에서 숨기기 */
.md-nav--primary .md-source {
  display: none !important;
}

/* ===== 반응형: 화면이 좁아지면 텍스트 숨김 ===== */
@media screen and (max-width: 44.9375em) {
  .md-header__cloud-label {
    display: none;
  }
  
  .md-header__cloud {
    margin-left: 0.3rem;
  }
}

/* 상단 탭 메뉴: 테마 기본 1220px → 960px에서 숨김 */
@media screen and (min-width: 60em) {
  .md-tabs {
    display: block !important;
  }
}

/* 모바일에서만 타이틀 숨기기 (태블릿/데스크탑은 표시) */
@media screen and (max-width: 44.9375em) {
  .md-header__title {
    display: none;
  }
}

/* 언어 선택기 간격 */
.md-header__inner .md-select {
  margin-left: 0;
}

/* Auth placeholder - 로딩 전 공간 확보 */
.physicar-auth-placeholder {
  height: 2.4rem;
  margin-left: 0.5rem;
  flex-shrink: 0;
}

/* Auth 컨테이너 */
.physicar-auth {
  display: flex;
  align-items: center;
  justify-content: flex-end;

  flex-shrink: 0;
}

/* ===== Auth Button Styles ===== */
.physicar-auth-buttons {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-right: 0.5rem;
}

.physicar-login-btn {
  display: flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  background: transparent;
  color: currentColor;
  border: none;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
  text-decoration: none;
}

.physicar-login-btn:hover {
  background: var(--md-primary-fg-color--dark);
}

.physicar-signup-btn {
  display: flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  background: rgba(255, 255, 255, 0.15);
  color: currentColor;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
  text-decoration: none;
}

.physicar-signup-btn:hover {
  background: rgba(255, 255, 255, 0.25);
}

.physicar-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.physicar-avatar {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
}

.physicar-username {
  display: none;
}

/* ===== User Dropdown Menu ===== */
.physicar-user-menu {
  position: relative;
}

.physicar-user-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.5rem;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
}

.physicar-user-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.physicar-chevron {
  width: 1rem;
  height: 1rem;
  color: var(--md-primary-bg-color);
  transition: transform 0.2s;
}

.physicar-dropdown.show ~ .physicar-user-btn .physicar-chevron,
.physicar-user-btn:has(+ .physicar-dropdown.show) .physicar-chevron {
  transform: rotate(180deg);
}

/* 드롭다운 패널 */
.physicar-dropdown {
  position: absolute;
  top: calc(100% + 0.3rem);
  right: 0;
  min-width: 220px;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 100;
}

.physicar-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 드롭다운 헤더 (유저 정보) */
.physicar-dropdown-header {
  display: flex;
  flex-direction: column;
  padding: 0.6rem 0.75rem;
}

.physicar-dropdown-info {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.physicar-dropdown-name {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--md-default-fg-color);
}

.physicar-dropdown-email {
  font-size: 0.6rem;
  color: var(--md-default-fg-color--light);
}

/* 구분선 */
.physicar-dropdown-divider {
  height: 1px;
  background: var(--md-default-fg-color--lightest);
  margin: 0.25rem 0;
}

/* 드롭다운 아이템 */
.physicar-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.6rem;
  color: var(--md-default-fg-color);
  text-decoration: none;
  font-size: 0.65rem;
  transition: background 0.15s;
  border: none;
  background: none;
  width: 100%;
  cursor: pointer;
  text-align: left;
}

.physicar-dropdown-item:hover {
  background: var(--md-default-fg-color--lightest);
}

.physicar-dropdown-item svg {
  width: 0.875rem;
  height: 0.875rem;
  color: var(--md-default-fg-color--light);
}

/* 로그아웃 버튼 스타일 */
.physicar-dropdown-logout {
  color: var(--md-accent-fg-color);
}

.physicar-dropdown-logout svg {
  color: var(--md-accent-fg-color);
}

/* 모바일에서 username 숨기기 */
@media screen and (max-width: 600px) {
  .physicar-username {
    display: none;
  }
  
  .physicar-dropdown {
    right: -0.5rem;
    min-width: 200px;
  }
}

/* ===== Chat Component ===== */

/* 오버레이 */
.physicar-chat-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 200;
}

.physicar-chat-overlay.active {
  opacity: 1;
}

/* 채팅 컨테이너 */
.physicar-chat-container {
  position: fixed;
  top: 0;
  bottom: 0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  z-index: 201;
  pointer-events: none;
  transition: left 0.3s ease, transform 0.3s ease, width 0.3s ease, bottom 0.3s ease;
}

/* 헤더 (닫기 버튼 영역) */
.physicar-chat-header {
  display: none;
  justify-content: center;
  padding: 1rem 0 0;
  flex-shrink: 0;
  pointer-events: auto;
  position: relative;
}

.physicar-chat-container.active .physicar-chat-header {
  display: flex;
}

/* 닫기 버튼 */
.physicar-chat-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin: 0 0 0.5rem;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 50%;
  cursor: pointer;
  opacity: 0.9;
  transition: opacity 0.2s, transform 0.1s;
}

.physicar-chat-close:hover {
  opacity: 1;
}

.physicar-chat-close:active {
  transform: scale(0.95);
}

.physicar-chat-close svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: var(--md-default-fg-color--light);
}

/* 대화 초기화 버튼 (헤더 좌측 상단) */
.physicar-chat-clear {
  position: absolute;
  left: 0.75rem;
  top: 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  height: 1.5rem;
  padding: 0 0.6rem;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 1rem;
  color: #e53935;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  opacity: 0.9;
  transition: opacity 0.2s, transform 0.1s;
}

.physicar-chat-clear svg {
  width: 0.95rem;
  height: 0.95rem;
  fill: #e53935;
}

.physicar-chat-clear:hover {
  opacity: 1;
}

.physicar-chat-clear:active {
  transform: scale(0.95);
}

/* 메시지 영역 - 입력창 바로 위에 위치, 아래에서 위로 쌓임 */
.physicar-chat-messages {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.3rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 0;
  flex: 1;
  margin-bottom: 0.5rem;
  visibility: hidden;
  pointer-events: none;
}

.physicar-chat-container.active .physicar-chat-messages {
  visibility: visible;
  padding: 0 1.2rem;
  pointer-events: auto;
}

/* 메시지 개별 항목만 pointer-events: auto */
.physicar-chat-message {
  pointer-events: auto;
}

/* 메시지 공통 스타일 */
.physicar-chat-message {
  max-width: 90%;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  line-height: 1.4;
  word-wrap: break-word;
  animation: chatMessageIn 0.3s ease-out;
}

/* 사용자 메시지는 pre-wrap으로 줄바꿈 유지 */
.physicar-chat-message--user {
  white-space: pre-wrap;
}

/* AI 메시지는 마크다운 렌더링이므로 normal */
.physicar-chat-message--ai {
  white-space: normal;
}

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

/* 사용자 메시지 - 우측, 우측 하단 뾰족 */
.physicar-chat-message--user {
  align-self: flex-end;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border-radius: 1rem 1rem 0.25rem 1rem;
}

/* AI 메시지 - 좌측, 좌측 하단 뾰족 */
.physicar-chat-message--ai {
  align-self: flex-start;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  border-radius: 1rem 1rem 1rem 0.25rem;
  border: 1px solid var(--md-default-fg-color--lighter);
}

/* ===== Tool Call/Output 접을 수 있는 섹션 ===== */
.physicar-chat-section {
  margin-top: 0;
  border-top: 1px solid var(--md-default-fg-color--lighter);
  padding-top: 0;
}

.physicar-chat-section-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0;
  cursor: pointer;
  font-size: 0.55rem;
  opacity: 0.8;
  user-select: none;
}

.physicar-chat-section-header:hover {
  opacity: 1;
}

.physicar-chat-section-header .arrow {
  transition: transform 0.2s;
  font-size: 0.55rem;
}

.physicar-chat-section-header.collapsed .arrow {
  transform: rotate(-90deg);
}

.physicar-chat-section-content {
  padding: 0.3rem 0;
  font-size: 0.7rem;
}

.physicar-chat-section-header.collapsed + .physicar-chat-section-content {
  display: none;
}

/* User 메시지의 Tool Output 섹션 */
.physicar-chat-message--user .physicar-chat-section {
  border-top-color: rgba(255,255,255,0.2);
}

.physicar-chat-message--user .physicar-chat-section-header {
  color: rgba(255,255,255,0.9);
}

/* AI 메시지의 Tool Call 섹션 */
.physicar-chat-message--ai .physicar-chat-section {
  border-top-color: var(--md-default-fg-color--lighter);
}

.physicar-chat-message--ai .physicar-chat-section-header {
  color: var(--md-default-fg-color--light);
}

/* Tool item 스타일 */
.physicar-chat-section .tool-item {
  padding: 0.2rem 0;
  border-bottom: 1px solid rgba(128,128,128,0.1);
}

.physicar-chat-section .tool-item:last-child {
  border-bottom: none;
}

.physicar-chat-section .tool-item .tool-name {
  font-weight: 600;
  color: #3498db;
  font-size: 0.6rem;
  margin: 0;
  padding: 0;
}

.physicar-chat-section .tool-item pre {
  margin: 0;
  padding: 0.2rem;
  background: rgba(0,0,0,0.05);
  border-radius: 4px;
  overflow-x: auto;
  white-space: pre-wrap;
  font-size: 0.5rem;
  max-height: 120px;
  overflow-y: auto;
}

.physicar-chat-message--user .physicar-chat-section .tool-item pre {
  background: rgba(0,0,0,0.15);
  color: orange;
}

.physicar-chat-message--ai .physicar-chat-section .tool-item pre {
  background: var(--md-code-bg-color);
}

/* AI 메시지 내부 마크다운 스타일 */
.physicar-chat-message--ai p {
  margin: 0 0 0.5em 0;
}

.physicar-chat-message--ai p:last-child {
  margin-bottom: 0;
}

.physicar-chat-message--ai ul,
.physicar-chat-message--ai ol {
  margin: 0.5em 0;
  padding-left: 1.5em;
}

.physicar-chat-message--ai li {
  margin: 0.2em 0;
}

.physicar-chat-message--ai code {
  background: var(--md-code-bg-color);
  padding: 0.1em 0.3em;
  border-radius: 3px;
  font-size: 0.85em;
}

.physicar-chat-message--ai img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 0.25em 0;
}

.physicar-chat-message--ai a {
  color: var(--md-accent-fg-color, #2094f3);
  text-decoration: underline;
}

.physicar-chat-message--ai a:hover {
  color: var(--md-accent-fg-color--light, #4dabf5);
}

.physicar-chat-message--ai .code-block-wrapper {
  position: relative;
  margin: 0.5em 0;
}

.physicar-chat-message--ai .code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s;
  color: var(--md-default-fg-color--light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.physicar-chat-message--ai .code-copy-btn svg {
  width: 16px;
  height: 16px;
}

.physicar-chat-message--ai .code-block-wrapper:hover .code-copy-btn {
  opacity: 1;
}

.physicar-chat-message--ai .code-copy-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.physicar-chat-message--ai .code-copy-btn.copied {
  color: #22c55e;
}

.physicar-chat-message--ai pre {
  background: var(--md-code-bg-color);
  border-radius: 6px;
  padding: 0.75em;
  margin: 0;
  overflow-x: auto;
}

.physicar-chat-message--ai pre code {
  background: none;
  padding: 0;
  font-size: 0.8em;
  line-height: 1.5;
}

.physicar-chat-message--ai blockquote {
  border-left: 3px solid var(--md-primary-fg-color);
  margin: 0.5em 0;
  padding-left: 0.75em;
  color: var(--md-default-fg-color--light);
}

.physicar-chat-message--ai table {
  border-collapse: collapse;
  margin: 0.5em 0;
  font-size: 0.85em;
}

.physicar-chat-message--ai th,
.physicar-chat-message--ai td {
  border: 1px solid var(--md-default-fg-color--lighter);
  padding: 0.3em 0.6em;
}

.physicar-chat-message--ai th {
  background: var(--md-default-fg-color--lightest);
}

/* 스트리밍 커서 애니메이션 */
.streaming-cursor {
  display: inline;
  border-right: 2px solid var(--md-primary-fg-color);
  margin-left: 1px;
  animation: blink 1s step-end infinite;
}

.streaming-cursor::after {
  content: '\200B'; /* zero-width space to give height */
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* 로딩 도트 애니메이션 (응답 대기 중) */
.physicar-chat-loading {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0.3rem 0;
}

.physicar-chat-loading-dot {
  width: 6px;
  height: 6px;
  background: var(--md-primary-fg-color);
  border-radius: 50%;
  animation: loading-bounce 1.4s ease-in-out infinite;
}

.physicar-chat-loading-dot:nth-child(1) {
  animation-delay: 0s;
}

.physicar-chat-loading-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.physicar-chat-loading-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes loading-bounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  40% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

/* 입력창 행 (아이콘 + 입력창) */
.physicar-chat-input-row {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  pointer-events: auto;
}

/* AI 아이콘 */
.physicar-chat-icon {
  width: 3.5rem;
  height: 3.5rem;
  flex-shrink: 0;
}

/* AI 아이콘 래퍼 */
.physicar-chat-icon-wrapper {
  position: relative;
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.physicar-chat-icon-wrapper:hover {
  transform: scale(1.05);
}

.physicar-chat-icon-wrapper:active {
  transform: scale(0.95);
}

/* TTS 토글 버튼 (스피커 아이콘) - 입력창 좌측 */
.physicar-chat-tts-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  background: #fff;
  border: 1.5px solid var(--md-default-fg-color--lightest);
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

.physicar-chat-tts-toggle:hover {
  border-color: var(--md-primary-fg-color);
  background: #fff;
}

.physicar-chat-tts-toggle:active {
  transform: scale(0.95);
}

.physicar-chat-tts-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
  color: var(--md-default-fg-color--light);
  transition: color 0.2s;
}

/* TTS 끄기 상태 (기본) */
.physicar-chat-tts-toggle .tts-icon-on {
  display: none;
}
.physicar-chat-tts-toggle .tts-icon-off {
  display: block;
}

/* TTS 켜기 상태 */
.physicar-chat-tts-toggle.tts-enabled .tts-icon-on {
  display: block;
  color: var(--md-primary-fg-color);
}
.physicar-chat-tts-toggle.tts-enabled .tts-icon-off {
  display: none;
}

.physicar-chat-tts-toggle.tts-enabled {
  border-color: var(--md-primary-fg-color);
  background: #fff;
}

/* TTS 재생 중 애니메이션 */
.physicar-chat-tts-toggle.tts-playing {
  animation: tts-pulse 1s ease-in-out infinite;
}

@keyframes tts-pulse {
  0%, 100% { box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15); }
  50% { box-shadow: 0 1px 8px rgba(var(--md-primary-fg-color--rgb, 74, 93, 109), 0.4); }
}

/* 입력창 래퍼 */
.physicar-chat-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  background: var(--md-default-bg-color);
  border: 1.5px solid var(--md-default-fg-color--lightest);
  border-radius: 1.5rem;
  padding: 0.3rem 0.3rem 0.3rem 0.3rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
  transition: border-color 0.2s, box-shadow 0.2s, opacity 0.2s, width 0.3s ease, padding 0.3s ease, margin 0.3s ease;
  opacity: 0.9;
}

.physicar-chat-container.active .physicar-chat-input-wrapper {
  border-color: var(--md-primary-fg-color);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
  opacity: 1;
}

/* 입력창 */
.physicar-chat-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 0.8rem;
  color: var(--md-default-fg-color);
  outline: none;
  resize: none;
  min-height: 1.4rem;
  max-height: 7rem; /* 약 5줄 */
  line-height: 1.4;
  overflow-y: auto;
  font-family: inherit;
}

.physicar-chat-input::placeholder {
  color: var(--md-default-fg-color--light);
}

/* 전송 버튼 */
.physicar-chat-send {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  flex-shrink: 0;
}

.physicar-chat-send:hover {
  background: var(--md-primary-fg-color--dark);
}

.physicar-chat-send:active {
  transform: scale(0.95);
}

.physicar-chat-send svg {
  width: 0.9rem;
  height: 0.9rem;
}

/* 스크롤바 스타일 */
.physicar-chat-messages::-webkit-scrollbar {
  width: 6px;
}

.physicar-chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.physicar-chat-messages::-webkit-scrollbar-thumb {
  background: var(--md-default-fg-color--lighter);
  border-radius: 3px;
}

/* ===== 채팅 최소화 상태 (minimized) ===== */
.physicar-chat-container.minimized {
  left: 1rem;
  transform: translateX(0);
  width: auto;
  max-width: none;
  bottom: 1rem;
  top: auto;
}

/* 최소화 시 헤더, 메시지 영역 숨김 */
.physicar-chat-container.minimized .physicar-chat-header,
.physicar-chat-container.minimized .physicar-chat-messages {
  display: none !important;
}

/* 최소화 시 입력창 래퍼 숨김 */
.physicar-chat-container.minimized .physicar-chat-input-wrapper {
  width: 0;
  padding: 0;
  margin: 0;
  border: none;
  box-shadow: none;
  opacity: 0;
  overflow: hidden;
  flex: 0;
}

/* 최소화 시 아이콘 강조 */
.physicar-chat-container.minimized .physicar-chat-icon-wrapper {
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.2));
}

.physicar-chat-container.minimized .physicar-chat-icon {
  width: 3.5rem;
  height: 3.5rem;
}

/* 모바일 */
@media screen and (max-width: 600px) {
  .physicar-chat-container {
    width: 95%;
  }
  
  .physicar-chat-message {
    max-width: 90%;
  }
  
  /* 모바일에서 최소화 위치 조정 */
  .physicar-chat-container.minimized {
    left: 0.5rem;
    bottom: 0.5rem;
  }
  
  .physicar-chat-container.minimized .physicar-chat-icon {
    width: 3.5rem;
    height: 3.5rem;
  }
}

/* ===== 마이크/음성 입력 관련 스타일 ===== */

/* X 버튼 (음성 입력 종료) - 음성 파동 중앙 위에 오버레이 */
.physicar-chat-mic-close {
  display: none; /* 기본 숨김, 녹음 중일 때만 표시 */
  align-items: center;
  justify-content: center;
  width: 1.4rem;
  height: 1.4rem;
  background: #e53935; /* 모던한 빨간색 */
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  position: absolute;
  left: 50%;
  top: calc(50% - 0.15rem); /* 살짝 위로 */
  transform: translate(-50%, -50%);
  z-index: 10;
}

.physicar-chat-mic-close svg {
  width: 0.9rem;
  height: 0.9rem;
}

.physicar-chat-mic-close:hover {
  background: #c62828; /* 더 진한 빨간색 */
}

.physicar-chat-mic-close:active {
  transform: translate(-50%, -50%) scale(0.95);
}

/* 녹음 중일 때 X 버튼 표시 (음성 파동 안에서) */
.physicar-chat-container.recording .physicar-chat-voice-wave .physicar-chat-mic-close {
  display: flex;
}

/* 마이크 버튼 */
.physicar-chat-mic {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  flex-shrink: 0;
}

.physicar-chat-mic svg,
.physicar-chat-mic img {
  width: 1.15rem;
  height: 1.15rem;
}

.physicar-chat-mic:hover {
  background: var(--md-primary-fg-color--dark);
}

.physicar-chat-mic:active {
  transform: scale(0.95);
}

/* 텍스트가 있거나 녹음 중일 때 마이크 숨김, send 버튼 표시 */
.physicar-chat-container.has-text .physicar-chat-mic,
.physicar-chat-container.recording .physicar-chat-mic {
  display: none;
}

/* 텍스트가 없고 녹음 중이 아닐 때 send 버튼 숨김 */
.physicar-chat-container:not(.has-text):not(.recording) .physicar-chat-send {
  display: none;
}

/* 음성 파동 UI */
.physicar-chat-voice-wave {
  display: none; /* 기본 숨김 */
  align-items: center;
  justify-content: center; /* 중앙 정렬 */
  gap: 4px; /* 막대 사이 고정 간격 */
  height: 0.7rem;
  padding: 0 2.5rem; /* 좌우 여백 동일하게 */
  width: 100%;
  position: absolute;
  bottom: 0.35rem;
  left: 0;
  right: 0;
  background: var(--md-default-bg-color);
  border-radius: 0 0 1.2rem 1.2rem;
  z-index: 1;
  box-sizing: border-box;
}

.physicar-chat-voice-wave span {
  width: 3px;
  height: 100%;
  background: var(--md-primary-fg-color);
  border-radius: 3px;
  flex-shrink: 0;
  opacity: 0.4;
  transform-origin: center;
}

/* 자연스러운 음성 파형 - 각 막대가 다른 애니메이션 사용 */
.physicar-chat-voice-wave span:nth-child(4n+1) { animation: wave1 0.9s ease-in-out infinite; }
.physicar-chat-voice-wave span:nth-child(4n+2) { animation: wave2 1.1s ease-in-out infinite; }
.physicar-chat-voice-wave span:nth-child(4n+3) { animation: wave3 0.8s ease-in-out infinite; }
.physicar-chat-voice-wave span:nth-child(4n)   { animation: wave4 1.0s ease-in-out infinite; }

/* 추가 변형으로 더 불규칙하게 */
.physicar-chat-voice-wave span:nth-child(5n+2) { animation-duration: 1.2s; }
.physicar-chat-voice-wave span:nth-child(7n+3) { animation-duration: 0.75s; }
.physicar-chat-voice-wave span:nth-child(11n+5) { animation-duration: 1.05s; }

@keyframes wave1 {
  0%, 100% { transform: scaleY(0.3); }
  25% { transform: scaleY(0.8); }
  50% { transform: scaleY(0.5); }
  75% { transform: scaleY(1); }
}

@keyframes wave2 {
  0%, 100% { transform: scaleY(0.4); }
  30% { transform: scaleY(1); }
  60% { transform: scaleY(0.3); }
  80% { transform: scaleY(0.7); }
}

@keyframes wave3 {
  0%, 100% { transform: scaleY(0.5); }
  20% { transform: scaleY(0.25); }
  45% { transform: scaleY(0.9); }
  70% { transform: scaleY(0.4); }
}

@keyframes wave4 {
  0%, 100% { transform: scaleY(0.35); }
  15% { transform: scaleY(0.7); }
  40% { transform: scaleY(0.2); }
  65% { transform: scaleY(1); }
  85% { transform: scaleY(0.5); }
}

/* 녹음 중일 때 파동 표시 */
.physicar-chat-container.recording .physicar-chat-voice-wave {
  display: flex;
}

/* 녹음 중일 때 입력창 래퍼에 여유 공간 추가 */
.physicar-chat-input-wrapper {
  position: relative;
}

.physicar-chat-container.recording .physicar-chat-input-wrapper {
  padding-bottom: 1.8rem;
}

/* 녹음 중일 때 입력창은 STT 텍스트 표시 영역 */
.physicar-chat-container.recording .physicar-chat-input {
  min-height: 1.4rem;
}

/* ===== Auth Page Styles ===== */
/* 상단 여백 제거 */
.md-main__inner {
  margin-top: 0;
}

.auth-page {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  max-width: 400px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* auth 페이지에서 MkDocs 자동 생성 h1 중앙 정렬 */
.md-typeset:has(.auth-page) > h1 {
  text-align: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

/* auth 페이지 h1 (페이지 제목) 스타일링 */
.auth-page-title,
.md-typeset .auth-page h1 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  text-align: center;
  color: var(--md-default-fg-color);
}

.auth-page-desc {
  margin: -0.5rem 0 1rem;
  text-align: center;
  color: var(--md-default-fg-color--light);
  font-size: 0.8rem;
}

.auth-form-group {
  margin-bottom: 0.75rem;
}

.auth-form-group label {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--md-default-fg-color);
}

.auth-form-group input {
  width: 100%;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
  font-size: 0.85rem;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.auth-form-group input:focus {
  outline: none;
  border-color: var(--md-primary-fg-color);
}

.auth-hint {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.7rem;
  color: var(--md-default-fg-color--light);
}

.auth-submit-btn {
  width: 100%;
  padding: 0.55rem;
  margin-top: 0.25rem;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border: none;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
}

.auth-submit-btn:hover:not(:disabled) {
  opacity: 0.9;
}

.auth-submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.auth-links {
  margin-top: 0.75rem;
  text-align: center;
}

.auth-links a {
  display: block;
  color: var(--md-primary-fg-color);
  text-decoration: none;
  font-size: 0.78rem;
  margin-top: 0.35rem;
}

.auth-links a:hover {
  text-decoration: underline;
}

/* Resend verification notice */
.auth-resend-notice {
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(255, 193, 7, 0.1);
  border: 1px solid rgba(255, 193, 7, 0.3);
  border-radius: 6px;
  text-align: center;
}

.auth-resend-notice p {
  margin: 0 0 0.5rem 0;
  font-size: 0.85rem;
  color: #e65100;
}

.auth-resend-notice a {
  color: var(--md-primary-fg-color);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
}

.auth-resend-notice a:hover {
  text-decoration: underline;
}

.auth-form-message {
  padding: 0.75rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  text-align: center;
}

.auth-form-message.error {
  background: rgba(244, 67, 54, 0.1);
  color: #f44336;
  border: 1px solid rgba(244, 67, 54, 0.3);
}

/* ===== 필드별 에러 상태 ===== */
.auth-field-error input,
.auth-field-error .auth-consent-items {
  border-color: #f44336 !important;
}

.auth-field-error-msg {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: #f44336;
  line-height: 1.3;
}

.auth-field-error-msg svg {
  flex-shrink: 0;
}

/* ===== 동의 체크박스 영역 ===== */
.auth-consent-section {
  margin: 0.75rem 0 0.25rem;
}

/* Turnstile 위젯 */
.auth-turnstile {
  display: flex;
  justify-content: center;
  margin: 0.75rem 0;
}

.auth-consent-all {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--md-default-fg-color);
  margin-bottom: 0.35rem;
}

.auth-consent-all input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--md-primary-fg-color);
  cursor: pointer;
  flex-shrink: 0;
}

.auth-consent-items {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
  transition: border-color 0.2s;
}

.auth-consent-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--md-default-fg-color--light);
  padding: 0.2rem 0;
}

.auth-consent-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--md-primary-fg-color);
  cursor: pointer;
  flex-shrink: 0;
}

.auth-consent-item a {
  color: var(--md-primary-fg-color);
  text-decoration: none;
}

.auth-consent-item a:hover {
  text-decoration: underline;
}

/* ===== 법적 고지 (가입 버튼 아래) ===== */
.auth-legal-notice {
  margin-top: 0.5rem;
  font-size: 0.65rem;
  color: var(--md-default-fg-color--light);
  text-align: center;
  line-height: 1.5;
}

.auth-legal-notice a {
  color: var(--md-primary-fg-color);
  text-decoration: none;
}

.auth-legal-notice a:hover {
  text-decoration: underline;
}

.auth-form-message.success {
  background: rgba(76, 175, 80, 0.1);
  color: #4caf50;
  border: 1px solid rgba(76, 175, 80, 0.3);
}

/* ===== 비밀번호 토글 (눈 모양) ===== */
.auth-password-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.auth-password-wrapper input {
  padding-right: 2.2rem;
}

.auth-password-toggle {
  position: absolute;
  right: 0.5rem;
  display: flex;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--md-default-fg-color--light);
  padding: 0.2rem;
}

.auth-password-toggle:hover {
  color: var(--md-default-fg-color);
}

.auth-password-toggle svg {
  width: 1.1rem;
  height: 1.1rem;
}

/* ===== 교실 초대코드 경고 섹션 ===== */
.classroom-invite-section {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: rgba(255, 152, 0, 0.08);
  border: 1px solid rgba(255, 152, 0, 0.3);
  border-radius: 6px;
}

.classroom-invite-msg {
  margin: 0 0 0.5rem 0;
  font-size: 0.8rem;
  color: #e65100;
  line-height: 1.4;
}

[data-md-color-scheme="slate"] .classroom-invite-msg {
  color: #ffb74d;
}

.classroom-invite-section .auth-form-group {
  margin-bottom: 0;
}

.classroom-invite-section input {
  text-transform: uppercase;
}

/* Avatar as initials */
.physicar-avatar.initials {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  color: var(--md-primary-bg-color);
  font-weight: 600;
  font-size: 0.75rem;
}

/* 스켈레톤 상태: /auth/me 응답 전 플레이스홀더 */
.physicar-skeleton .physicar-avatar {
  background: rgba(255, 255, 255, 0.2);
  animation: physicar-pulse 1.5s ease-in-out infinite;
}

.physicar-skeleton .physicar-username {
  display: none;
}

.physicar-skeleton .physicar-chevron {
  visibility: hidden;
}

@keyframes physicar-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

/* ===== Custom scrollbar ===== */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--md-default-fg-color--lightest) transparent;
}
*::-webkit-scrollbar { width: 6px; height: 6px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--md-default-fg-color--lightest); border-radius: 3px; }
*::-webkit-scrollbar-thumb:hover { background: var(--md-default-fg-color--light); }