@import url('https://fonts.googleapis.com/css2?family=Gowun+Batang&family=Gowun+Dodum&family=Noto+Sans+KR:wght@400;500;700;900&family=Poor+Story&display=swap');

  :root {
    --bg: #fdf8f3;
    --panel: #ffffff;
    --sidebar: #F6CAD7;
    --sidebar2: #fdf6ef;
    --accent: #7d5334;
    --accent2: #59361e;
    --text1: #3e2410;
    --text2: #6b4425;
    --textm: #9a7255;
    --textw: #3e2410;
    --border: #e8d5be;
    --border2: #d9bda0;
    --locked: #fbbf24;
    --danger: #ef4444;
    --danger-text: #991b1b;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.14);
    --sb-width: 290px;
    --board-w: 400px;
    --cell-w: 100px;
    --cell-h: 75px;
    --row-gap: 8px;
    --col-gap: 63px;
    --title-color: #3e2410;
    --name-size: 24px; 
    --id-size: 19px;   
    --seat-font: 'Gowun Dodum', sans-serif;
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--bg);
    color: var(--text1);
    height: 100vh;
    display: flex;
    overflow: hidden;
    font-size: 13px;
    user-select: none;
    -webkit-user-select: none;
  }

  input, textarea, select {
    user-select: auto;
    -webkit-user-select: auto;
  }

  /* ── Sidebar ── */
  #sidebar {
    width: var(--sb-width);
    min-width: var(--sb-width);
    max-width: var(--sb-width);
    height: 100vh;
    max-height: 100vh;
    padding-top: clamp(6px, 1.2vh, 10px);
    background: var(--sidebar);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    user-select: none;
    z-index: 20;
    box-sizing: border-box;
  }

  #sb-header {
    padding: 16px 14px 10px;
    border-bottom: 1px solid var(--border2);
    flex-shrink: 0;
  }

  .sb-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
  }

  .sb-logo-icon {
    width: 38px; height: 38px;
    background: #fde68a;
    color: #b45309;
    border-radius: 99px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
  }

  .sb-title { color: var(--title-color); font-size: 13px; font-weight: 900; line-height: 1.3; }
  .sb-sub { color: var(--accent2); font-size: 9px; letter-spacing: .06em; margin-top: 1px; }

  .sb-btns {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 5px;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border2);
    flex-shrink: 0;
  }

  .sb-btn {
    background: var(--sidebar2);
    color: var(--textw);
    border: 1px solid var(--border2);
    border-radius: 7px;
    padding: 7px 4px;
    font-size: 12px;
    font-family: 'Noto Sans KR', sans-serif;
    cursor: pointer;
    display: flex; flex-direction: column; align-items: center; gap: 3px;
    transition: background .15s;
  }
  .sb-btn:hover { background: rgba(255,255,255,.08); }
  .sb-btn.accent { background: var(--accent); color: #fff; border-color: var(--accent); }
  .sb-btn.accent:hover { opacity: .85; }
  .sb-btn.danger { background: rgba(239,68,68,.12); color: var(--danger-text); border-color: rgba(239,68,68,.3); }
  .sb-btn.danger:hover { background: rgba(239,68,68,.25); }

  .switch {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 22px;
  }
  .switch input {
    opacity: 0;
    width: 0;
    height: 0;
  }
  .switch .slider {
    position: absolute;
    inset: 0;
    background: #e2d7cb;
    border: 1px solid var(--border2);
    border-radius: 999px;
    transition: background .2s, border-color .2s;
  }
  .switch .slider::before {
    content: '';
    position: absolute;
    left: 2px;
    bottom: 1px;
    width: 18px;
    height: 18px;
    background: #fff;
    border-radius: 50%;
    transition: transform .2s;
    box-shadow: 0 1px 3px rgba(0,0,0,.15);
  }
  .switch input:checked + .slider {
    background: #F18BA7;
    border-color: #F18BA7;
  }
  .switch input:checked + .slider::before {
    transform: translateX(18px);
  }

  .toggle-label {
    color: var(--text1);
    font-size: 11.5px;
    font-weight: 700;
    white-space: nowrap;
  }

  .sb-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding: 0 12px 14px;
    margin-top: 0 !important;
    position: static !important;
    top: auto !important;
    box-sizing: border-box;
  }

  /* 사이드바 상단 캐릭터 영역 비율 유지 스케일링 */
  .sb-char-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
    margin-bottom: 12px;
    flex-shrink: 0;
  }

  .sb-char-img {
    width: 75px;
    height: 75px;
    object-fit: cover;
    border-radius: 18px;
    border: 3px solid #ffffff;
    box-shadow: 0 4px 12px rgba(235,104,156,0.3);
    flex-shrink: 0;
  }

  /* 사이드바 하단 문구 (자리 배치결과 카드 바로 아래 카드간 간격과 동일하게 배치) */
  .sb-footer-wrap {
    margin-top: 0 !important;
    margin-bottom: 12px;
    padding-top: 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-shrink: 0;
  }

  /* Cards */
  .card {
    background: var(--sidebar2);
    border: 1px solid var(--border2);
    border-radius: 15px;
    margin-bottom: 11px;
    overflow: visible;
    position: relative;
    flex-shrink: 0;
  }

  .card-head {
    display: flex; align-items: center; gap: 7px;
    padding: clamp(6px, 1vh, 9px) 11px;
    font-size: clamp(12.5px, 1.6vh, 14px); font-weight: 800;
    color: var(--textw);
    border-bottom: 1px solid var(--border2);
  }
  .card-head .badge {
    margin-left: auto;
    background: var(--accent);
    color: #fff;
    border-radius: 20px;
    padding: 2px 8px;
    font-size: 10px;
    font-weight: 800;
  }

  .card-body { padding: clamp(6px, 1.1vh, 10px) 11px; }

  .lbl {
    display: block;
    font-size: 11px;
    font-weight: 700;
    color: var(--text2);
    margin-bottom: 3px;
  }

  .inp {
    width: 100%;
    background: #ffffff;
    border: 1px solid var(--border2);
    border-radius: 9px;
    color: var(--text1);
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 12px;
    padding: 7px 9px;
    outline: none;
    margin-bottom: 0;
  }
  .inp:focus { border-color: var(--accent); }
  .inp option { background: #ffffff; }

  .inp-num {
    text-align: center;
    padding: 6px 5px;
    font-size: 13px;
  }

  .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 6px; }
  .mb6 { margin-bottom: 6px; }
  .mb8 { margin-bottom: 8px; }

  /* 메인 툴바 실행 버튼 스타일 */
  .exec-btn {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 12px;
    padding: 10px 20px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 16px;
    font-weight: 900;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    letter-spacing: .02em;
    transition: opacity .15s, transform .1s;
    box-shadow: none;
  }
  .exec-btn:hover { opacity: 1; transform: translateY(-2px); }
  .exec-btn:active { opacity: 1; transform: translateY(0); }

  /* 사이드바 배치 실행 버튼 (보조용) */
  .exec-btn-sm {
    width: 100%;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 12px;
    padding: 11px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 13px;
    font-weight: 900;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 7px;
    margin-bottom: 10px;
    letter-spacing: .02em;
    transition: opacity .15s, transform .1s;
    box-shadow: none;
  }
  .exec-btn-sm:hover { opacity: .9; transform: translateY(-1px); }
  .exec-btn-sm:active { transform: translateY(0); }

  .exec-btn-sm.outline {
    background: #fff;
    color: var(--text1);
    border: 1px solid var(--border2);
    border-radius: 10px;
    box-shadow: none;
    font-weight: 700;
    font-size: 13px;
    padding: 8px 4px;
    margin-bottom: 0;
  }

  .slider-row { display: flex; align-items: center; gap: 7px; margin-bottom: 5px; }
  .slider-label { font-size: 10px; color: var(--textm); white-space: nowrap; min-width: 56px; }
  input[type=range] {
    flex: 1;
    accent-color: var(--accent);
    height: 4px;
    cursor: pointer;
  }

  /* ── Student grid input ── */
  .student-grid-wrap {
    border: 1px solid var(--border2);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 8px;
  }
  .student-grid-head {
    display: grid;
    grid-template-columns: 52px 1fr 52px;
    background: rgba(59,130,246,.18);
    border-bottom: 2px solid var(--accent);
    overflow-y: scroll;
  }
  .student-grid-head::-webkit-scrollbar-thumb {
    background: transparent;
  }
  .student-grid-head div {
    padding: 5px 4px;
    font-size: 10px;
    font-weight: 800;
    color: var(--accent2);
    text-align: center;
    border-right: 1px solid var(--border2);
  }
  .student-grid-head div:last-child { border-right: none; }
  .student-grid-body {
    max-height: 260px;
    overflow-y: scroll;
  }
  .student-row {
    display: grid;
    grid-template-columns: 52px 1fr 52px;
    border-bottom: 1px solid var(--border2);
  }
  .student-row:last-child { border-bottom: none; }
  .student-cell {
    padding: 0;
    border-right: 1px solid var(--border2);
  }
  .student-cell:last-child { border-right: none; }
  .student-cell input {
    width: 100%;
    height: 28px;
    background: transparent;
    border: none;
    outline: none;
    color: var(--textw);
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 11px;
    padding: 0 6px;
    text-align: center;
  }
  .student-cell input:focus { background: rgba(59,130,246,.08); }
  .student-row.placeholder-row .student-cell input {
    color: var(--textm);
    opacity: .5;
  }
  .student-grid-footer {
    display: flex;
    gap: 5px;
    margin-top: 5px;
  }
  .grid-action-btn {
    flex: 1;
    background: var(--sidebar);
    border: 1px solid var(--border2);
    border-radius: 6px;
    color: var(--textm);
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 10px;
    font-weight: 700;
    padding: 5px 4px;
    cursor: pointer;
    text-align: center;
    transition: all .15s;
  }
  .grid-action-btn:hover { color: var(--textw); border-color: var(--accent); }

  /* ── Main area ── */
  #main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  #main-toolbar {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 12px; 
    flex-shrink: 0;
  }

  .toolbar-btn {
    padding: 8px 14px;
    border-radius: 7px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 14px;
    font-weight: 700;
    border: 1px solid var(--border);
    cursor: pointer;
    background: var(--panel);
    color: var(--text2);
    display: inline-flex; align-items: center; gap: 4px;
    transition: all .15s;
    white-space: nowrap;
  }
  .toolbar-btn:hover { border-color: var(--accent); color: var(--accent); }

  .spacer { flex: 1; }

  /* ── Workspace ── */
  #workspace {
    flex: 1;
    overflow: auto;
    padding: 16px 12px 40px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
  }

  #board-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: auto 0;
    transform-origin: top center; 
  }

  /* Blackboard */
  .blackboard {
    order: 1;
    background: linear-gradient(180deg, #3a5c3b 0%, #1e3320 50%, #2d4a2e 100%);
    color: #ffffff;
    font-size: 19px;
    font-weight: 900;
    border-radius: 8px 8px 0 0;
    padding: 12px 40px;
    text-align: center;
    letter-spacing: .15em;
    width: var(--board-w);
    min-width: 200px;
    box-shadow:
      inset 0 3px 10px rgba(0,0,0,.5),
      inset 0 -1px 4px rgba(0,0,0,.3),
      inset 2px 0 6px rgba(0,0,0,.2),
      inset -2px 0 6px rgba(0,0,0,.2);
    border: 4px solid #3d6e40;
    border-bottom: 3px solid #2a5230;
    position: relative;
    text-shadow: none;
    margin-top: 0;
    transition: margin-top 0.3s;
  }
  .blackboard::before {
    content: '';
    position: absolute;
    top: 5px; left: 5px; right: 5px; bottom: 0;
    border: 1px solid rgba(167,243,196,.12);
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    pointer-events: none;
  }
  
  /* chalk tray */
  .board-spacer {
    order: 2;
    width: var(--board-w);
    height: 12px;
    background: linear-gradient(180deg, #5c3d1a 0%, #7a5230 40%, #5c3d1a 100%);
    border-left: 4px solid #3d6e40;
    border-right: 4px solid #3d6e40;
    border-bottom: 3px solid #3d2a10;
    box-shadow: 0 4px 10px rgba(0,0,0,.25);
    margin-bottom: 20px;
  }

  #seats-wrap {
    order: 3;
    background: var(--panel);
    border: 2.5px solid var(--sidebar);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 14px rgba(246, 202, 215, 0.4);
    display: inline-block;
  }

  /* 교사 시점 활성화 시 Flex Order 순서 변경 */
  #board-area.teacher-mode .blackboard { order: 3; margin-top: 20px; }
  #board-area.teacher-mode .board-spacer { order: 4; margin-bottom: 0; }
  #board-area.teacher-mode #seats-wrap { order: 1; margin-top: 0; }

  .cols-container {
    display: flex;
    gap: var(--col-gap);
    align-items: flex-start;
  }

  .col-group {
    display: flex;
    flex-direction: column;
    gap: var(--row-gap);
    align-items: center;
  }

  .col-label {
    font-size: 22px;
    font-weight: 800;
    color: var(--text1);
    text-align: center;
    margin-bottom: 4px;
  }

  /* 모둠 레이블 */
  .group-label {
    font-size: 18px;
    font-weight: 800;
    color: var(--accent2);
    text-align: center;
    margin-bottom: 4px;
    width: 100%;
  }

  /* Seat Cell */
  .seat {
    width: var(--cell-w);
    height: var(--cell-h);
    border: 2px solid #a0714a;
    border-radius: 7px;
    background: linear-gradient(160deg, #d4a76a 0%, #c49454 60%, #b8843e 100%);
    box-shadow: 0 2px 6px rgba(100,60,20,.25), inset 0 1px 2px rgba(255,255,255,.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background .15s, border-color .15s, box-shadow .15s, transform .15s;
    position: relative;
    overflow: hidden;
  }
  .seat:hover { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,.2), 0 2px 6px rgba(100,60,20,.3); }

  .seat.occupied {
    background: linear-gradient(160deg, #fdf6ec 0%, #faebd7 60%, #f5deb3 100%);
    border-color: #a0714a;
  }

  .seat.occupied.male::before {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 10%;
    background: #93c5fd; border-radius: 0 0 4px 4px; pointer-events: none; z-index: 1;
  }
  .seat.occupied.female::before {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 10%;
    background: #f9a8d4; border-radius: 0 0 4px 4px; pointer-events: none; z-index: 1;
  }

  .seat.ghost {
    background: #f1f5f9;
    border: 2px dashed #cbd5e1;
    box-shadow: none;
    cursor: default;
  }
  .seat.ghost:hover { border-color: #cbd5e1; box-shadow: none; }

  .seat.excluded {
    background: #fef2f2;
    border: 2px dashed #fca5a5;
    box-shadow: none;
    cursor: pointer;
  }

  .seat.locked { border-color: var(--locked); }
  .seat.locked::after {
    content: '🔒';
    position: absolute;
    top: 2px; right: 3px;
    font-size: 16px;
    z-index: 10;
  }

  .seat.selected { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,.3); }
  .seat.over { background: #eff6ff; border-color: var(--accent); }

  .touch-drag-ghost {
    position: fixed;
    pointer-events: none;
    z-index: 99999;
    transform: translate(-50%, -50%);
    width: 65px;
    height: 65px;
    background: #ffffff;
    border: 2px solid var(--accent);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    opacity: 0.9;
  }
  .touch-drag-ghost.male { background: #eff6ff; border-color: #3b82f6; }
  .touch-drag-ghost.female { background: #fdf2f8; border-color: #ec4899; }
  .touch-drag-ghost .seat-id { font-size: 11px; font-weight: 700; color: var(--accent); }
  .touch-drag-ghost .seat-name { font-size: 13px; font-weight: 700; color: var(--text1); }

  .seat-id {
    font-family: 'JetBrains Mono', monospace;
    font-size: var(--id-size);
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
    z-index: 5;
  }

  .seat-name {
    font-family: var(--seat-font);
    font-size: var(--name-size);
    font-weight: 700;
    color: var(--text1);
    line-height: 1.3;
    text-align: center;
    max-width: calc(var(--cell-w) - 10px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    z-index: 5;
  }

  .seat.excluded .seat-empty-mark { color: #fca5a5; font-size: 16px; }

  .fixed-dot {
    position: absolute;
    bottom: 3px; left: 3px;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--locked);
    z-index: 10;
  }

  /* Speech Bubble (말풍선) */
  .speech-bubble {
    position: relative;
    background: #ffffff;
    border: 2px solid #F18BA7;
    border-radius: 14px;
    padding: 8px 10px;
    font-size: 12px;
    font-weight: 700;
    color: var(--text1);
    box-shadow: 0 4px 12px rgba(241,139,167,0.15);
    flex: 1;
    word-break: keep-all;
    line-height: 1.35;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 75px;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
    user-select: none;
  }
  .speech-bubble::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    border-style: solid;
    border-width: 6px 8px 6px 0;
    border-color: transparent #F18BA7 transparent transparent;
  }
  .speech-bubble::after {
    content: '';
    position: absolute;
    left: -5px;
    top: 50%;
    transform: translateY(-50%);
    border-style: solid;
    border-width: 5px 6px 5px 0;
    border-color: transparent #ffffff transparent transparent;
  }
  .speech-bubble.counting {
    background: #fff0f5;
    border-color: #f43f5e;
    cursor: pointer;
    animation: bubblePulse 0.6s infinite alternate ease-in-out;
  }
  @keyframes bubblePulse {
    from { transform: scale(1); }
    to { transform: scale(1.03); }
  }

  /* Custom Top Tooltip (상단 말풍선 툴팁) */
  .tooltip-wrap {
    position: relative;
    display: inline-flex;
  }
  .tooltip-wrap .custom-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: calc(50% + 5px);
    transform: translateX(-50%) translateY(4px);
    background: #ffffff;
    color: #ef4444;
    border: 1.5px solid #fca5a5;
    padding: 4px 8px;
    border-radius: 7px;
    font-size: 11px;
    font-weight: 800;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(239,68,68,0.15);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 100;
  }
  .tooltip-wrap .custom-tooltip::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-style: solid;
    border-width: 6px 6px 0 6px;
    border-color: #fca5a5 transparent transparent transparent;
  }
  .tooltip-wrap .custom-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-style: solid;
    border-width: 5px 5px 0 5px;
    border-color: #ffffff transparent transparent transparent;
  }
  .tooltip-wrap:hover .custom-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }

  /* Toast */
  #toast {
    position: fixed;
    bottom: 24px; left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #F18BA7;
    color: #fff;
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    opacity: 0;
    transition: all .25s;
    pointer-events: none;
    z-index: 9999;
    white-space: nowrap;
    box-shadow: 0 6px 20px rgba(241,139,167,0.35);
    text-align: center;
  }
  #toast.error {
    background: var(--danger);
    font-size: 16px;
    padding: 16px 28px;
    box-shadow: 0 10px 30px rgba(239,68,68,0.4);
  }
  #toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

  /* Modal */
  .mbg {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.55);
    display: flex; align-items: center; justify-content: center;
    z-index: 800;
  }
  .modal {
    background: var(--panel);
    border-radius: 14px;
    padding: 22px 20px 18px;
    width: min(380px, 92vw);
    box-shadow: var(--shadow-lg);
  }
  .modal h3 { font-size: 15px; font-weight: 900; margin-bottom: 14px; color: var(--text1); }
  .modal-msg { font-size: 13px; line-height: 1.6; color: var(--text2); margin-bottom: 18px; white-space: pre-wrap; }
  .modal-btns { display: flex; gap: 8px; }
  .modal-btns button {
    flex: 1; padding: 11px;
    border-radius: 9px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 13px; font-weight: 700;
    cursor: pointer; border: none;
  }
  .btn-ok { background: var(--danger); color: #fff; }
  .btn-cancel { background: var(--bg); color: var(--text2); }

  /* Context menu */
  #ctx-menu {
    position: fixed;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 5px;
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    z-index: 700;
    display: none;
  }
  #ctx-menu.open { display: block; }
  .ctx-item {
    padding: 8px 11px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    color: var(--text2);
    display: flex; align-items: center; gap: 7px;
  }
  .ctx-item:hover { background: var(--bg); color: var(--text1); }
  .ctx-item.danger { color: var(--danger); }
  .ctx-sep { height: 1px; background: var(--border); margin: 4px 0; }
  .ctx-head { padding: 6px 11px 2px; font-size: 10px; font-weight: 800; color: var(--textm); }

  /* 커서가 영역 내에 있을 때만 깔끔하게 나타나는 스마트 호버 스크롤바 */
  * {
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
  }
  *:hover {
    scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
  }

  ::-webkit-scrollbar { width: 6px; height: 6px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 4px;
    transition: background 0.2s ease-in-out;
  }
  *:hover::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
  }
  ::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.4) !important;
  }

  #sb-resizer {
    display: none;
    width: 0;
    cursor: default;
    background: transparent;
    transition: none;
    flex-shrink: 0;
    align-self: stretch;
  }
  #sb-resizer:hover { background: var(--accent); }

  .sort-row { display: flex; gap: 4px; margin-top: 5px; }
  .sort-row .inp { font-size: 11px; padding: 5px 4px; }

  /* ── 인쇄 전용 스타일 (html2canvas 캔버스 이미지 방식: A4 가로 1페이지 완벽 맞춤) ── */
  #print-img-wrap {
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    z-index: 999999;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 20px;
  }

  #print-img-wrap img {
    max-width: 95vw;
    max-height: 95vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    background: #ffffff;
  }

  @media print {
    body > *:not(#print-img-wrap) {
      display: none !important;
    }
    
    html, body {
      background: #ffffff !important;
      width: 100% !important;
      height: 100% !important; 
      margin: 0 !important;
      padding: 0 !important;
      overflow: hidden !important;
      display: flex !important;
      align-items: center !important;
      justify-content: center !important;
    }

    #print-img-wrap {
      position: static !important;
      left: auto !important;
      top: auto !important;
      width: 100% !important;
      height: 100% !important;
      background: #ffffff !important;
      display: flex !important;
      align-items: center !important;
      justify-content: center !important;
      page-break-inside: avoid !important;
      break-inside: avoid !important;
      padding: 0 !important;
    }

    #print-img-wrap img {
      max-width: 98% !important;
      max-height: 98vh !important;
      width: auto !important;
      height: auto !important;
      object-fit: contain !important;
      display: block !important;
      margin: auto !important;
      box-shadow: none !important;
      border-radius: 0 !important;
    }

    * {
      -webkit-print-color-adjust: exact !important;
      print-color-adjust: exact !important;
      box-shadow: none !important;
      text-shadow: none !important;
      filter: none !important;
    }

    @page {
      size: landscape;
      margin: 0; 
    }
  }

/* ── Save Popover Menu ── */
#save-popover {
  display: none;
  position: fixed;
  z-index: 1100;
  background: #ffffff;
  border: 1px solid var(--border2);
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
  padding: 6px;
  width: 170px;
}
.pop-item-btn {
  background: none;
  border: none;
  text-align: left;
  width: 100%;
  padding: 9px 12px;
  font-size: 12px;
  font-weight: 800;
  color: var(--text1);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
}
.pop-item-btn:hover {
  background: rgba(59, 130, 246, 0.08);
}

/* ── Countdown Overlay ── */
.countdown-mbg {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  cursor: pointer;
  animation: fadeInOverlay 0.25s ease-out forwards;
}

.countdown-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  user-select: none;
}

.countdown-img-wrap {
  width: clamp(250px, 40vmin, 580px);
  height: clamp(250px, 40vmin, 580px);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-bottom: calc(clamp(250px, 40vmin, 580px) * -0.12);
}

#countdown-char-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 10px 25px rgba(0,0,0,0.35));
  animation: countdownPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

#countdown-num-text {
  font-size: clamp(90px, 15vmin, 220px);
  font-weight: 900;
  color: #ffffff;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6), 0 0 20px rgba(241, 139, 167, 0.9);
  line-height: 1;
  margin-bottom: clamp(10px, 2vmin, 24px);
  z-index: 2;
  font-family: 'Noto Sans KR', sans-serif;
  animation: countdownPop 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.countdown-sub-hint {
  font-size: clamp(13px, 2vmin, 22px);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(0, 0, 0, 0.35);
  padding: clamp(6px, 1vmin, 12px) clamp(16px, 2.5vmin, 32px);
  border-radius: 30px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  backdrop-filter: blur(4px);
}

@keyframes countdownPop {
  0% {
    transform: scale(0.4);
    opacity: 0;
  }
  70% {
    transform: scale(1.08);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes fadeInOverlay {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── 32인치 이상 대형 고해상도 모니터 비율 고정 전체 확장 스케일 (QHD / 4K) ── */
@media (min-height: 860px) and (min-width: 1400px) {
  :root {
    --sb-width: 360px;
    --board-w: 480px;
    --cell-w: 124px;
    --cell-h: 88px;
    --row-gap: 11px;
    --col-gap: 72px;
    --name-size: 28px;
    --id-size: 22px;
  }

  body {
    font-size: 14.5px;
  }

  .sb-char-img {
    width: 88px !important;
    height: 88px !important;
  }

  .speech-bubble {
    font-size: 14.5px !important;
    padding: 13px 16px !important;
  }

  .card {
    margin-bottom: 13px !important;
    border-radius: 17px !important;
  }

  .card-head {
    font-size: 15.5px !important;
    padding: 11px 14px !important;
  }

  .card-body {
    padding: 13px 14px !important;
  }

  .inp {
    font-size: 13.5px !important;
    padding: 9px 11px !important;
  }

  .lbl {
    font-size: 12.5px !important;
    margin-bottom: 4px !important;
  }

  .exec-btn {
    font-size: 17px !important;
    padding: 13px 22px !important;
  }

  .exec-btn-sm {
    font-size: 13.5px !important;
    padding: 8px 11px !important;
  }

  .blackboard {
    font-size: 24px !important;
    padding: 15px 45px !important;
  }

  .sb-footer-wrap a {
    font-size: 12.5px !important;
  }
}

@media (min-height: 1050px) and (min-width: 1750px) {
  :root {
    --sb-width: 430px;
    --board-w: 580px;
    --cell-w: 148px;
    --cell-h: 106px;
    --row-gap: 15px;
    --col-gap: 88px;
    --name-size: 33px;
    --id-size: 26px;
  }

  body {
    font-size: 16.5px;
  }

  .sb-char-img {
    width: 105px !important;
    height: 105px !important;
  }

  .speech-bubble {
    font-size: 16.5px !important;
    padding: 16px 20px !important;
  }

  .card {
    margin-bottom: 16px !important;
    border-radius: 20px !important;
  }

  .card-head {
    font-size: 18px !important;
    padding: 14px 17px !important;
  }

  .card-body {
    padding: 15px 17px !important;
  }

  .inp {
    font-size: 15.5px !important;
    padding: 11px 13px !important;
  }

  .lbl {
    font-size: 13.5px !important;
    margin-bottom: 5px !important;
  }

  .exec-btn {
    font-size: 20px !important;
    padding: 15px 26px !important;
  }

  .exec-btn-sm {
    font-size: 15px !important;
    padding: 9px 15px !important;
  }

  .blackboard {
    font-size: 30px !important;
    padding: 18px 80px !important;
  }

  .sb-footer-wrap a {
    font-size: 14.5px !important;
  }
}