/* Board Panel — 풀스크린 PDF 뷰어 스타일 */

#board-panel {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #1e2530;
  display: none;            /* JS 가 flex 로 토글 */
  flex-direction: column;
  z-index: 10000;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
  user-select: none;
  -webkit-user-select: none;
}

/* ─── 툴바 ─── */
#board-panel .board-toolbar {
  height: 48px;
  background: #252d38;
  border-bottom: 1px solid #3d4654;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  flex-shrink: 0;
}

#board-panel .board-close {
  width: 36px;
  height: 36px;
  font-size: 22px;
  font-weight: 300;
  line-height: 1;
}

#board-panel .board-title {
  color: #e0e0e0;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 12px;
  max-width: 30vw;
}

#board-panel .board-sync-status {
  flex: 1;
  color: #9ca3af;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 4px;
  transition: color 0.3s;
}

#board-panel .board-nav,
#board-panel .board-zoom {
  display: flex;
  align-items: center;
  gap: 4px;
}

#board-panel .board-zoom {
  border-left: 1px solid #3d4654;
  padding-left: 12px;
  margin-left: 4px;
}

#board-panel .board-btn {
  background: transparent;
  border: 1px solid #3d4654;
  border-radius: 4px;
  color: #d1d5db;
  padding: 4px 10px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
}

#board-panel .board-btn:hover {
  background: #3d4654;
  border-color: #4d5664;
}

#board-panel .board-btn:active {
  background: #4d5664;
}

#board-panel .board-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#board-panel .board-page-input {
  width: 48px;
  background: #1a2028;
  border: 1px solid #3d4654;
  border-radius: 4px;
  color: #e0e0e0;
  padding: 4px 6px;
  font-size: 13px;
  text-align: center;
  height: 32px;
}

#board-panel .board-page-input::-webkit-outer-spin-button,
#board-panel .board-page-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

#board-panel .board-page-input:focus {
  outline: none;
  border-color: #3b82f6;
}

#board-panel .board-page-info,
#board-panel .board-zoom-level {
  color: #9ca3af;
  font-size: 13px;
  white-space: nowrap;
  min-width: 36px;
  text-align: center;
}

/* ─── 콘텐츠 영역 ─── */
#board-panel .board-content {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #1e2530;
}

#board-panel .board-scroll {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  /* overflow 시 좌측 잘림 방지 — 페이지 크기가 컨테이너보다 클 때 flex-start 로 정렬 */
  align-items: flex-start;
  gap: 16px;
}
#board-panel .board-page-container {
  /* 페이지가 컨테이너보다 작을 때 가로 가운데 정렬 (auto margin) */
  margin-left: auto;
  margin-right: auto;
}

#board-panel .board-page-container {
  background: #fff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  max-width: 100%;
}

#board-panel .board-page-container canvas {
  display: block;
  /* max-width:100% 제거 — _scale 에 따른 실제 픽셀 크기 표시 (zoom 작동) */
}
#board-panel .board-page-container.board-pinching {
  transform-origin: 0 0;
  will-change: transform;
}

/* ─── Empty 상태 (PDF 로드 전) ─── */
#board-panel .board-empty {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #6b7280;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  font-size: 18px;
  font-weight: 500;
}

#board-panel .board-empty svg {
  opacity: 0.4;
}

#board-panel .board-empty-hint {
  font-size: 13px;
  font-weight: 400;
  color: #9ca3af;
  max-width: 400px;
  line-height: 1.6;
}

/* ─── 로딩·에러 ─── */
#board-panel .board-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #e0e0e0;
  font-size: 14px;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  z-index: 10;
}

#board-panel .board-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #3d4654;
  border-top-color: #3b82f6;
  border-radius: 50%;
  animation: board-spin 1s linear infinite;
}

@keyframes board-spin {
  to { transform: rotate(360deg); }
}

#board-panel .board-error {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ef4444;
  font-size: 14px;
  display: none;
  text-align: center;
  padding: 16px;
  background: #252d38;
  border: 1px solid #ef4444;
  border-radius: 6px;
  max-width: 80%;
}

/* 모바일·태블릿 — 툴바 컴팩트
   ⭐ #board-panel.board-mobile 클래스 기반 (JS 검출 결과)
   viewport 폭 기준 미디어쿼리가 아니라 panel.classList 기반 → iPad 처럼 viewport > 720px 인 태블릿도 적용 */
#board-panel.board-mobile .board-toolbar {
  height: 44px;
  padding: 0 6px;
  gap: 3px;
}
/* 모바일에선 제목·sync 상태 숨김 (공간 확보) */
#board-panel.board-mobile .board-title,
#board-panel.board-mobile .board-sync-status {
  display: none !important;
}
/* 데스크탑 도구·색상·굵기·투명도 그룹 자체 숨김 (모바일 box 로 이동·재배치됨) */
#board-panel.board-mobile .board-tools-group {
  display: none !important;
}
#board-panel.board-mobile .board-btn {
  min-width: 28px;
  height: 30px;
  padding: 4px 6px;
  font-size: 13px;
}
#board-panel.board-mobile .board-zoom-level,
#board-panel.board-mobile .board-page-info {
  font-size: 11px;
  min-width: 26px;
}
#board-panel.board-mobile .board-page-input {
  width: 34px;
  height: 28px;
  font-size: 11px;
}
/* 줌 영역도 컴팩트 */
#board-panel.board-mobile .board-zoom {
  border-left: 0;
  padding-left: 4px;
  margin-left: 0;
  gap: 2px;
}

/* 데스크탑 default — 모바일 전용 컨테이너 숨김 */
#board-panel .board-mobile-only { display: none; }

/* ─── 항공기 type 드롭다운 (데스크탑) ─── */
#board-panel .board-aircraft-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0;
}
#board-panel .board-aircraft-btn {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: 0;
}
#board-panel .board-aircraft-caret-btn {
  min-width: 18px;
  padding: 4px 4px;
  font-size: 10px;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  background: #2b3441;
  border-color: #3d4654;
  color: #9ca3af;
}
#board-panel .board-aircraft-caret-btn:hover {
  background: #3d4654;
  color: #d1d5db;
}
#board-panel .board-aircraft-menu {
  display: none;
  position: absolute;
  top: 36px;
  left: 0;
  background: #252d38;
  border: 1px solid #3d4654;
  border-radius: 6px;
  padding: 4px 0;
  z-index: 10001;
  min-width: 160px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.5);
}
#board-panel .board-aircraft-menu.open { display: block; }
#board-panel .board-aircraft-menu button {
  display: block;
  width: 100%;
  background: transparent;
  border: 0;
  color: #e0e0e0;
  padding: 8px 14px;
  text-align: left;
  font-size: 13px;
  cursor: pointer;
}
#board-panel .board-aircraft-menu button:hover {
  background: #3d4654;
}
#board-panel .board-aircraft-menu button.active {
  background: #3b82f6;
  color: #fff;
}
#board-panel .board-aircraft-emoji {
  display: inline-block;
  width: 22px;
  text-align: center;
}

/* ⭐ 모바일 전용 toolbar 컴팩트 + 드롭다운/팝업 — panel.board-mobile 클래스 기반 (viewport 무관) */
#board-panel.board-mobile .board-mobile-only {
  display: flex;
  align-items: center;
  gap: 3px;
  position: relative;
}
#board-panel.board-mobile .board-mobile-only .board-btn {
  padding: 4px 6px;
  height: 30px;
  min-width: 30px;
  font-size: 14px;
}
#board-panel.board-mobile .board-mcaret {
  font-size: 9px;
  margin-left: 2px;
  opacity: 0.7;
}
#board-panel.board-mobile #board-mtool-btn,
#board-panel.board-mobile #board-maircraft-btn {
  background: #2b3441;
  border-color: #4d5664;
  min-width: 48px;
}

/* 모바일 항공기 type 메뉴 */
#board-panel.board-mobile .board-maircraft-menu {
  display: none;
  position: absolute;
  top: 38px;
  left: 54px;
  background: #252d38;
  border: 1px solid #3d4654;
  border-radius: 6px;
  padding: 4px 0;
  z-index: 10001;
  min-width: 160px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.5);
}
#board-panel.board-mobile .board-maircraft-menu.open { display: block; }
#board-panel.board-mobile .board-maircraft-menu button {
  display: block;
  width: 100%;
  background: transparent;
  border: 0;
  color: #e0e0e0;
  padding: 9px 14px;
  text-align: left;
  font-size: 14px;
  cursor: pointer;
}
#board-panel.board-mobile .board-maircraft-menu button:hover,
#board-panel.board-mobile .board-maircraft-menu button:active {
  background: #3d4654;
}
#board-panel.board-mobile .board-maircraft-menu button.active {
  background: #3b82f6;
  color: #fff;
}
/* 데스크탑 항공기 메뉴는 모바일에서 숨김 (tools-group 자체가 숨겨지지만 명시) */
#board-panel.board-mobile .board-aircraft-menu { display: none !important; }

/* 도구 드롭다운 메뉴 */
#board-panel.board-mobile .board-mtool-menu {
  display: none;
  position: absolute;
  top: 38px;
  left: 0;
  background: #252d38;
  border: 1px solid #3d4654;
  border-radius: 6px;
  padding: 4px 0;
  z-index: 10001;
  min-width: 130px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.5);
}
#board-panel.board-mobile .board-mtool-menu.open { display: block; }
#board-panel.board-mobile .board-mtool-menu button {
  display: block;
  width: 100%;
  background: transparent;
  border: 0;
  color: #e0e0e0;
  padding: 9px 14px;
  text-align: left;
  font-size: 14px;
  cursor: pointer;
}
#board-panel.board-mobile .board-mtool-menu button:hover,
#board-panel.board-mobile .board-mtool-menu button:active {
  background: #3d4654;
}

/* 색상·굵기·투명도 팝업 */
#board-panel.board-mobile .board-mpalette {
  display: none;
  position: absolute;
  top: 38px;
  left: 54px;
  background: #252d38;
  border: 1px solid #3d4654;
  border-radius: 6px;
  padding: 10px 12px;
  z-index: 10001;
  min-width: 230px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.5);
}
#board-panel.board-mobile .board-mpalette.open { display: block; }
#board-panel.board-mobile .board-mpal-row {
  color: #9ca3af;
  font-size: 11px;
  font-weight: 500;
  margin: 8px 0 5px;
}
#board-panel.board-mobile .board-mpal-row:first-child { margin-top: 0; }
#board-panel.board-mobile .board-mpal-slot {
  display: flex;
  align-items: center;
  gap: 6px;
}
/* 팔레트 안으로 이동된 색상/굵기/투명도 컨트롤 — display 복귀 + 크기 확대 */
#board-panel.board-mobile .board-mpalette .board-colors,
#board-panel.board-mobile .board-mpalette .board-widths,
#board-panel.board-mobile .board-mpalette .board-opacity {
  display: flex !important;
  padding: 0;
  border: 0;
  margin: 0;
  gap: 6px;
}
#board-panel.board-mobile .board-mpalette .board-color-btn {
  width: 26px;
  height: 26px;
}
#board-panel.board-mobile .board-mpalette .board-width-btn {
  width: 38px;
  height: 30px;
}
#board-panel.board-mobile .board-mpalette .board-opacity input[type="range"] {
  width: 150px;
  height: 6px;
}
#board-panel.board-mobile .board-mpalette .board-opacity-val {
  font-size: 12px;
  min-width: 38px;
}

/* ─── 필기 도구 (Phase 2) ─── */
#board-panel .board-tools-group {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-left: 12px;
  border-left: 1px solid #3d4654;
  margin-left: 4px;
}

#board-panel .board-tool-btn.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #fff;
}

#board-panel .board-colors {
  display: flex;
  gap: 3px;
  align-items: center;
  padding: 0 6px;
}

#board-panel .board-color-btn {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: transform 0.1s;
}

#board-panel .board-color-btn:hover {
  transform: scale(1.1);
}

#board-panel .board-color-btn.active {
  border-color: #fff;
  box-shadow: 0 0 0 2px #3b82f6;
}

#board-panel .board-widths {
  display: flex;
  gap: 3px;
  align-items: center;
}

#board-panel .board-width-btn {
  width: 32px;
  height: 24px;
  background: transparent;
  border: 1px solid #3d4654;
  border-radius: 3px;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

#board-panel .board-width-btn:hover {
  background: #3d4654;
  border-color: #4d5664;
}

#board-panel .board-width-btn i {
  display: block;
  width: 18px;
  background: #d1d5db;
  border-radius: 2px;
}

#board-panel .board-width-btn.active {
  background: #3d4654;
  border-color: #4d5664;
}

#board-panel .board-width-btn.active i {
  background: #fff;
}

/* ─── 투명도 슬라이더 ─── */
#board-panel .board-opacity {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 6px;
  border-left: 1px solid #3d4654;
  margin-left: 2px;
}

#board-panel .board-opacity input[type="range"] {
  width: 70px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: #3d4654;
  border-radius: 2px;
  outline: none;
}

#board-panel .board-opacity input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid #4d5664;
  cursor: pointer;
}

#board-panel .board-opacity input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid #4d5664;
  cursor: pointer;
}

#board-panel .board-opacity-val {
  color: #9ca3af;
  font-size: 11px;
  min-width: 34px;
  text-align: right;
}

/* ─── 주석 캔버스 ─── */
#board-panel .board-annot-canvas {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: auto;
  touch-action: none;
}

#board-panel .board-pdf-canvas {
  position: relative;
  z-index: 0;
}

/* 페이지 컨테이너 정확 정렬 */
#board-panel .board-page-container {
  display: inline-block;
}

/* 모바일 도구 컴팩트 */
@media (max-width: 720px) {
  #board-panel .board-tools-group {
    gap: 2px;
    padding-left: 4px;
  }
  #board-panel .board-color-btn {
    width: 16px;
    height: 16px;
  }
  #board-panel .board-width-btn {
    width: 24px;
    height: 22px;
  }
  #board-panel .board-width-btn i {
    width: 14px;
  }
  #board-panel .board-colors,
  #board-panel .board-widths {
    padding: 0 2px;
  }
  #board-panel .board-opacity input[type="range"] {
    width: 50px;
  }
  #board-panel .board-opacity-val {
    font-size: 10px;
    min-width: 28px;
  }
}

/* 인쇄 방지 */
@media print {
  #board-panel { display: none !important; }
}