/* ===== Mode Selection Overlay ===== */

.mode-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.mode-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* v17.5: 模式选择 Modal — 统一新拟态，禁止克莱因蓝填充 */
.mode-card {
  background: var(--neu-bg);
  border-radius: 24px;
  padding: 32px 24px;
  width: 90%;
  max-width: 360px;
  text-align: center;
  box-shadow: 16px 16px 32px var(--neu-dark), -16px -16px 32px var(--neu-light);
}

.mode-card h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--neu-text);
  margin-bottom: 8px;
}

.mode-card .mode-subtitle {
  font-size: 14px;
  color: var(--neu-text-secondary);
  margin-bottom: 24px;
}

.mode-btns {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mode-btn {
  width: 100%;
  padding: 20px;
  border-radius: 20px;
  background: var(--neu-bg);
  box-shadow: 10px 10px 20px var(--neu-dark), -10px -10px 20px var(--neu-light);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--neu-text);
  font-size: 16px;
  font-weight: 500;
  -webkit-tap-highlight-color: transparent;
}

.mode-btn:active {
  box-shadow: inset 5px 5px 10px var(--neu-dark), inset -5px -5px 10px var(--neu-light);
  transform: scale(0.98);
}

/* v17.5: 去除 .primary 的克莱因蓝填充，双按钮统一新拟态 */
.mode-btn.primary {
  background: var(--neu-bg);
  color: var(--neu-text);
  border: none;
  box-shadow: 10px 10px 20px var(--neu-dark), -10px -10px 20px var(--neu-light);
}
.mode-btn.primary:active {
  box-shadow: inset 5px 5px 10px var(--neu-dark), inset -5px -5px 10px var(--neu-light);
  transform: scale(0.98);
}

.mode-btn .mode-desc {
  display: block;
  font-size: 12px;
  font-weight: normal;
  color: var(--neu-text-secondary);
  margin-top: 4px;
}

.mode-btn.primary .mode-desc {
  color: var(--neu-text-secondary);
}

/* ===== Room Lobby ===== */

.room-lobby {
  display: none;
  padding: 24px 16px;
  max-width: 480px;
  margin: 0 auto;
}

.room-lobby h2 {
  text-align: center;
  font-size: 20px;
  color: var(--text);
  margin-bottom: 24px;
}

.room-lobby-section {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
}

.room-lobby-section h3 {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 12px;
}

.room-lobby-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: white;
  transition: opacity 0.2s;
  box-shadow: var(--shadow-raised-sm);
}

.room-lobby-btn:active {
  box-shadow: var(--shadow-pressed);
  transform: scale(0.96);
}

.room-lobby-btn:disabled {
  opacity: 0.6;
  pointer-events: none;
}

.room-code-input-wrap {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.room-code-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 18px;
  text-transform: uppercase;
  text-align: center;
  letter-spacing: 4px;
  outline: none;
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow-inset);
}

.room-code-input:focus {
  border-color: var(--primary);
  box-shadow: var(--shadow-inset), 0 0 0 3px rgba(11, 50, 137, 0.1);
}

.room-lobby-btn.secondary {
  background: var(--bg);
  border: 1px solid var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-raised-sm);
}

/* ===== Modal 内按钮 — v16: 统一新拟态，禁止填充色和边框 ===== */
.modal-btn-primary {
  width: 100%;
  padding: 14px;
  border-radius: 16px;
  background: var(--neu-bg);
  box-shadow: 8px 8px 16px var(--neu-dark), -8px -8px 16px var(--neu-light);
  border: none;
  color: var(--neu-text);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  -webkit-tap-highlight-color: transparent;
}
.modal-btn-primary:active {
  box-shadow: inset 4px 4px 8px var(--neu-dark), inset -4px -4px 8px var(--neu-light);
  transform: scale(0.98);
}

.modal-btn-secondary {
  width: 100%;
  padding: 14px;
  border-radius: 16px;
  background: var(--neu-bg);
  box-shadow: 6px 6px 12px var(--neu-dark), -6px -6px 12px var(--neu-light);
  border: none;
  color: var(--neu-text-secondary);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  -webkit-tap-highlight-color: transparent;
}
.modal-btn-secondary:active {
  box-shadow: inset 3px 3px 6px var(--neu-dark), inset -3px -3px 6px var(--neu-light);
  transform: scale(0.98);
}

/* ===== Room View ===== */

.room-view {
  display: none;
  flex-direction: column;
}

/* Header room code & countdown */
/* v17.5: 房间码可点击复制 */
#headerRoomCode {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 3px;
  color: white;
  cursor: pointer;
  transition: opacity 0.2s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
#headerRoomCode:active {
  opacity: 0.7;
}
#headerRoomCode::after {
  content: '\f328'; /* Font Awesome fa-clipboard */
  font-family: 'Font Awesome 6 Free', 'Font Awesome 5 Free', 'FontAwesome';
  font-weight: 900;
  font-size: 14px;
  margin-left: 6px;
  opacity: 0.8;
}

#headerCountdown {
  font-size: 12px;
  font-weight: 400;
  color: rgba(255,255,255,0.8);
  margin-left: 2px;
}

.room-members-bar {
  padding: 8px 16px;
  background: var(--bg);
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  flex-shrink: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
}

.room-member-tag {
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  background: var(--bg-light);
  color: var(--text-secondary);
  white-space: nowrap;
}

.room-member-tag.creator {
  background: var(--primary);
  color: white;
}

/* ===== Chat Drawer ===== */

.chat-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-radius: 16px 16px 0 0;
  box-shadow: var(--shadow-lg);
  z-index: 1100;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  max-height: 60vh;
  display: flex;
  flex-direction: column;
}

.chat-drawer.open {
  transform: translateY(0);
}

.drawer-handle {
  width: 36px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin: 8px auto;
}

.drawer-header {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-tabs {
  display: flex;
  gap: 0;
}

.drawer-tab {
  padding: 6px 16px;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.drawer-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.drawer-close {
  width: 28px;
  height: 28px;
  border: none;
  background: var(--bg);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  box-shadow: var(--shadow-raised-sm);
}

.drawer-close:active {
  box-shadow: var(--shadow-pressed);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

/* Messages */
.room-msg {
  padding: 6px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 13px;
  line-height: 1.5;
}

.room-msg-user {
  font-weight: 600;
  color: var(--primary);
  margin-right: 6px;
}

.room-msg-time {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: 8px;
}

.room-chat-empty, .room-log-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 24px;
  font-size: 14px;
}

/* v20: Chat warning bar */
.chat-warning-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  margin: 0 10px;
  font-size: 12px;
  color: var(--neu-text-secondary);
  background: var(--neu-bg);
  border-radius: 10px;
  box-shadow: inset 3px 3px 6px var(--neu-dark), inset -3px -3px 6px var(--neu-light);
  text-align: center;
  justify-content: center;
}

.chat-warning-bar i {
  color: #D97706;
  font-size: 13px;
  flex-shrink: 0;
}

/* Chat input */
.chat-input-bar {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  border-top: 1px solid var(--border-light);
}

.chat-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 14px;
  outline: none;
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow-inset-sm);
}

.chat-input:focus {
  border-color: var(--primary);
}

.chat-send-btn {
  padding: 10px 16px;
  border: none;
  border-radius: 20px;
  background: var(--primary);
  color: white;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-raised-sm);
}

.chat-send-btn:active {
  box-shadow: var(--shadow-pressed);
  transform: scale(0.92);
}

/* Log items */
.room-log-item {
  padding: 4px 0;
  font-size: 12px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

/* Floating chat button */
.floating-chat-btn {
  position: fixed;
  bottom: 100px;
  right: 16px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  box-shadow: 0 4px 12px rgba(11, 50, 137, 0.3);
  cursor: pointer;
  z-index: 1050;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.floating-chat-btn.show {
  display: flex;
}

.unread-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  background: var(--danger);
  color: white;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

/* Drawer backdrop */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 1090;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.drawer-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}