/* 기본값: 무채색(매장 미로드·폴백). 매장 accentColor 로드 시 JS가 덮어씀. */
:root {
  --bg-page: #f2f4f6;
  --bg-panel: #ffffff;
  --accent: #333d4b;
  --accent-hover: #191f28;
  --accent-muted: #f2f4f6;
  --accent-focus: rgba(25, 31, 40, 0.14);
  --text-primary: #191f28;
  --text-secondary: #6b7684;
  --border: #e5e8eb;
  --shadow: 0 4px 24px rgba(0, 23, 51, 0.06);
  --shadow-sm: 0 1px 6px rgba(0, 23, 51, 0.04);
  --customer-bubble: #333d4b;
  --agent-bubble: #f2f4f6;
  --radius: 16px;
  --radius-sm: 12px;
  --radius-pill: 999px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--bg-page);
  background-image: none;
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Embed: iframe 안에서 전체 높이에 맞춤, 스크롤 없음 */
html.embed,
html.embed body {
  height: 100%;
  min-height: 0;
  overflow: hidden;
}
html.embed .app {
  min-height: 0;
  height: 100%;
  margin: 0;
}
@media (min-width: 560px) {
  html.embed .app {
    margin: 0 auto;
  }
}

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

.app {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  box-shadow: var(--shadow);
  border-radius: 0;
}

@media (min-width: 560px) {
  .app {
    border-radius: 16px;
    margin-top: 1rem;
    margin-bottom: 1rem;
    overflow: hidden;
  }
}

/* Header */
.chat-header {
  padding: 1.5rem 1.5rem 1.6rem;
  background: linear-gradient(165deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: #fff;
  flex-shrink: 0;
  position: relative;
  overflow: visible;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.header-lang {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.lang-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.lang-btn:hover,
.lang-btn:focus {
  background: rgba(255, 255, 255, 0.38);
  outline: none;
}

.lang-btn:active {
  transform: scale(0.96);
}

.lang-btn[aria-expanded="true"] {
  background: rgba(255, 255, 255, 0.45);
}

.lang-globe {
  width: 22px;
  height: 22px;
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  min-width: 150px;
  padding: 0.4rem;
  background: #fff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  z-index: 100;
}

.lang-dropdown.hidden {
  display: none;
}

.lang-dropdown button {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
}

.lang-dropdown button:hover {
  background: var(--accent-muted);
  color: var(--accent);
}

.logo-icon {
  font-size: 1.75rem;
  margin-bottom: 0.1rem;
  opacity: 0.95;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1));
}

.logo h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-shadow: 0 1px 2px rgba(0,0,0,0.08);
}

.subtitle {
  margin: 0;
  font-size: 0.8rem;
  opacity: 0.9;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Main chat area */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 0 1rem;
}

/* Scrollable chat history */
.chat-history {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1rem 0.5rem 0.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  -webkit-overflow-scrolling: touch;
}

.chat-history::-webkit-scrollbar {
  width: 6px;
}

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

.chat-history::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.welcome-message {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding: 1.25rem 1rem;
  background: var(--agent-bubble);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.welcome-message p {
  margin: 0 0 0.5rem;
}

.welcome-message p:last-child {
  margin-bottom: 0;
}

.welcome-message .lang-hint {
  margin-top: 0.85rem;
  font-size: 0.8rem;
  opacity: 0.9;
  letter-spacing: 0.01em;
}

.prompt-examples-wrap {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.prompt-examples-label {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.prompt-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.prompt-chip {
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-panel);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
}

.prompt-chip:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

/* Message bubbles */
.message {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 85%;
  animation: messageIn 0.25s ease-out;
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.customer {
  align-self: flex-end;
}

.message.agent {
  align-self: flex-start;
}

.message-bubble {
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  line-height: 1.55;
  word-break: break-word;
  box-shadow: var(--shadow-sm);
}

.message.customer .message-bubble {
  background: linear-gradient(165deg, var(--customer-bubble) 0%, var(--accent-hover) 100%);
  color: #fff;
  border-bottom-right-radius: 6px;
}

.message.agent .message-bubble {
  background: var(--agent-bubble);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 6px;
}

.message-role {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.message.customer .message-role {
  text-align: right;
  color: rgba(255, 255, 255, 0.88);
}

/* Input area */
.chat-input-area {
  flex-shrink: 0;
  display: flex;
  gap: 0.6rem;
  padding: 1.1rem 0 1.35rem;
  align-items: center;
  border-top: 1px solid var(--border);
  margin-top: auto;
  background: var(--bg-panel);
}

.message-input {
  flex: 1;
  padding: 0.8rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--bg-page);
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.message-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.85;
}

.message-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-focus);
  background: var(--bg-panel);
}

.send-button {
  padding: 0.8rem 1.35rem;
  background: linear-gradient(165deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}

.send-button:hover {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
}

.send-button:active {
  transform: scale(0.97);
}

.send-button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

/* 게스트 AI 제공 — 손님용 채팅 하단 브랜드 노출 */
.chat-powered-by {
  flex-shrink: 0;
  padding: 0.5rem 1rem 0.75rem;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
}

.chat-powered-by a {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  opacity: 0.85;
  transition: color 0.2s, opacity 0.2s;
}

.chat-powered-by a:hover {
  color: var(--accent);
  opacity: 1;
}

/* Responsive */
@media (max-width: 480px) {
  .app {
    max-width: 100%;
  }

  .message {
    max-width: 92%;
  }

  .chat-input-area {
    padding-left: 0;
    padding-right: 0;
  }
}

.chat-expired-overlay {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.96);
  border-radius: inherit;
}

.chat-expired-overlay.hidden {
  display: none;
}

.chat-expired-msg {
  margin: 0;
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 22rem;
  line-height: 1.5;
}

.app.chat-disabled .chat-input-area {
  pointer-events: none;
  opacity: 0.45;
}

.app.chat-disabled .header-lang {
  pointer-events: none;
  opacity: 0.45;
}