@import url('https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@700;800&display=swap');

:root {
  --C: 12mm;
  --accent: #3a7bd5;
  --border: #bbb;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Hiragino Kaku Gothic Pro', 'Meiryo', sans-serif;
  background: #f0f2f5; color: #222;
}

/* ===== アプリレイアウト ===== */
.app { display: flex; height: 100vh; overflow: hidden; }

.panel {
  width: 270px; min-width: 230px;
  background: #fff; border-right: 1px solid #ddd;
  padding: 16px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 12px;
}
.panel h2 { font-size: 14px; font-weight: 700; color: #555; letter-spacing: .05em; }
.panel-section { display: flex; flex-direction: column; gap: 6px; }
.panel-section label { font-size: 13px; font-weight: 600; color: #333; }
.panel-section input[type=number] {
  width: 100%; padding: 6px 8px;
  border: 1px solid #ccc; border-radius: 6px;
  font-size: 13px; background: #fafafa;
}
.panel-section input:focus { outline: none; border-color: var(--accent); }
.panel-section input:disabled { background: #f0f0f0; color: #aaa; cursor: not-allowed; }
.panel-section.locked { opacity: 0.45; pointer-events: none; }

.toggle-row { display: flex; align-items: center; justify-content: space-between; }
.toggle-row span { font-size: 13px; }
.toggle { position: relative; width: 40px; height: 22px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; inset: 0; background: #ccc; border-radius: 22px; cursor: pointer; transition: background .2s; }
.slider::before { content: ''; position: absolute; left: 3px; top: 3px; width: 16px; height: 16px; background: #fff; border-radius: 50%; transition: transform .2s; }
.toggle input:checked + .slider { background: var(--accent); }
.toggle input:checked + .slider::before { transform: translateX(18px); }

.btn { width: 100%; padding: 9px; border: none; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer; transition: opacity .15s; }
.btn:hover { opacity: .85; }
.btn-primary { background: var(--accent); color: #fff; }

.divider { border: none; border-top: 1px solid #eee; }

/* ── グループピル ── */
.group-pills { display: flex; flex-wrap: wrap; gap: 5px; }
.group-pill {
  padding: 6px 12px; border: 1.5px solid #ddd; border-radius: 20px;
  background: #fff; color: #555; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all .15s;
}
.group-pill:hover { border-color: var(--accent); color: var(--accent); }
.group-pill.active {
  background: var(--accent); border-color: var(--accent);
  color: #fff; box-shadow: 0 1px 4px rgba(58,123,213,.3);
}

/* ── パターン ── */
.pat-details { width: 100%; }
.pat-summary {
  width: 100%; padding: 6px 8px;
  border: 1px solid #ccc; border-radius: 6px;
  background: #fafafa; cursor: pointer; list-style: none;
  font-size: 13px; color: #333;
  display: flex; align-items: center; justify-content: space-between;
  user-select: none;
}
.pat-summary::-webkit-details-marker { display: none; }
.pat-summary::after { content: '▾'; font-size: 10px; color: #666; }
.pat-details[open] .pat-summary { border-color: var(--accent); border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
.pat-details[open] .pat-summary::after { content: '▴'; }
.pat-details .check-group { padding: 8px 10px; border: 1px solid var(--accent); border-top: none; border-bottom-left-radius: 6px; border-bottom-right-radius: 6px; background: #fff; }
.check-group { display: flex; flex-direction: column; gap: 5px; }
.check-row { display: flex; align-items: center; gap: 7px; font-size: 13px; cursor: pointer; user-select: none; }
.check-row input[type=checkbox] { width: 15px; height: 15px; cursor: pointer; accent-color: var(--accent); flex-shrink: 0; }
.check-all { font-weight: 600; padding-bottom: 5px; border-bottom: 1px solid #eee; }


/* ── 右上ナビ ── */
.top-btns { position: fixed; top: 16px; right: 20px; z-index: 200; display: flex; gap: 8px; }
.top-btn { padding: 8px 18px; border: none; border-radius: 8px; font-size: 13px; font-weight: 600; cursor: pointer; box-shadow: 0 2px 8px rgba(0,0,0,.18); transition: opacity .15s, transform .1s; }
.top-btn:hover   { opacity: .88; }
.top-btn:active  { transform: translateY(1px); }
.top-btn:disabled { opacity: .4; cursor: default; transform: none; }
.top-btn-settings { background: #fff; color: #333; }
.top-btn-settings.current { background: #e8edf2; color: #555; box-shadow: none; cursor: default; }
.top-btn-preview  { background: #e67e22; color: #fff; }
.top-btn-print    { background: #27ae60; color: #fff; }
.top-btn-answer   { background: #f0f2f5; color: #333; }
.top-btn-answer.active { background: #2ecc71; color: #fff; }
@media print { .top-btns { display: none; } }

/* ── プレビューエリア ── */
.preview-area {
  flex: 1; overflow: auto; padding: 24px;
  display: flex; flex-direction: column; align-items: center;
}

/* ── シートラッパー（ズーム用） ── */
.sheet-wrapper { flex-shrink: 0; }

/* ── シートコンテナ（複数枚） ── */
#sheetsContainer { display: flex; flex-direction: column; align-items: center; gap: 20px; }

/* ── プリントシート（縦向きA4）── */
.print-sheet {
  background: #fff; width: 210mm; height: 297mm; overflow: hidden;
  padding: 12mm 16mm;
  box-shadow: 0 2px 12px rgba(0,0,0,.12);
  transform-origin: top left;
}

/* ── ズームバー ── */
.zoom-bar {
  position: fixed; bottom: 20px; right: 24px; z-index: 150;
  display: flex; align-items: center; gap: 1px;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0,0,0,.10);
  border-radius: 20px;
  padding: 3px 5px;
  box-shadow: 0 2px 10px rgba(0,0,0,.10);
  opacity: .55;
  transition: opacity .2s;
  user-select: none;
}
.zoom-bar:hover { opacity: 1; }
.zoom-btn {
  width: 26px; height: 26px; border: none; border-radius: 13px;
  background: transparent; font-size: 15px; font-weight: 700;
  color: #444; cursor: pointer; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background .12s;
}
.zoom-btn:hover { background: rgba(0,0,0,.07); }
.zoom-reset {
  min-width: 42px; border: none; border-radius: 4px;
  background: transparent; font-size: 12px; font-weight: 600;
  color: #555; cursor: pointer; padding: 2px 4px;
  transition: background .12s; border-left: 1px solid rgba(0,0,0,.09); margin-left: 2px; padding-left: 7px;
}
.zoom-reset:hover { background: rgba(0,0,0,.07); }

/* ── ズームスライダー ── */
.zoom-slider {
  -webkit-appearance: none; appearance: none;
  width: 90px; height: 3px;
  background: rgba(0,0,0,.18); border-radius: 2px;
  outline: none; cursor: pointer;
  margin: 0 2px;
}
.zoom-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 13px; height: 13px; border-radius: 50%;
  background: #3a7bd5;
  box-shadow: 0 1px 3px rgba(58,123,213,.4);
  transition: transform .1s;
}
.zoom-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.zoom-slider::-moz-range-thumb {
  width: 13px; height: 13px; border-radius: 50%; border: none;
  background: #3a7bd5; box-shadow: 0 1px 3px rgba(58,123,213,.4);
}
@media print { .zoom-bar { display: none; } }

.sheet-header { display: flex; align-items: flex-end; gap: 16px; margin-bottom: 6mm; }
.sheet-title {
  flex: 1; min-width: 40mm; outline: none;
  font-family: 'M PLUS Rounded 1c', 'Hiragino Maru Gothic Pro', sans-serif;
  font-size: 32px; font-weight: 800;
}
.sheet-title[contenteditable="true"]:empty::before { content: attr(data-placeholder); color: #ccc; }
.header-field { display: flex; align-items: flex-end; gap: 4px; font-size: 18px; white-space: nowrap; }
.header-field .line { display: inline-block; width: 60px; border-bottom: 1px solid #333; }
.header-field .name-line { width: 70mm; }

.sheet-instruction {
  min-height: 6mm; margin-bottom: 6mm;
  font-size: 14px; line-height: 1.7; color: #222;
  outline: none; white-space: pre-wrap;
}
.sheet-instruction:empty::before { content: attr(data-placeholder); color: #bbb; }
.sheet-instruction[contenteditable="true"] { border-bottom: 1px dashed #ccc; padding-bottom: 2px; cursor: text; }
.instruction-toolbar { display: flex; align-items: center; gap: 6px; margin-bottom: 3px; font-size: 11px; color: #999; }
.inst-size-btn { width: 20px; height: 20px; padding: 0; border: 1px solid #ddd; border-radius: 4px; background: #f5f5f5; color: #555; font-size: 13px; display: flex; align-items: center; justify-content: center; cursor: pointer; }
.inst-size-btn:hover { background: #e8e8e8; }
#instSizeDisplay { font-size: 12px; color: #555; min-width: 18px; text-align: center; }

/* ── 問題グリッド ── */
.problems-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols, 2), 1fr);
  column-gap: var(--col-gap, 6mm);
  row-gap: var(--row-gap, 8mm);
  justify-items: start;
  align-items: start;
}
.print-sheet .problems-grid {
  min-height: var(--grid-min-h, 248mm);
  align-content: space-evenly;
}

/* ── 問題スタイル ── */
.prob-wrap {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: calc(var(--C) * 0.2);
}
.prob-label {
  font-size: min(calc(var(--C) * 0.65), 6.5mm);
  font-weight: 600;
  color: #555;
  white-space: nowrap;
  min-width: calc(var(--C) * 1.4);
  text-align: left;
}
.p1-formula {
  display: flex;
  align-items: var(--formula-align, center);
  gap: calc(var(--C) * var(--form-gap, 0.18));
  white-space: nowrap;
}
.p1n {
  font-size: calc(var(--C) * var(--num-scale, 1.1));
  font-weight: 700;
  min-width: calc(var(--C) * var(--num-mw, 1.5));
  text-align: center;
  display: inline-block;
  color: #222;
}
/* さくらんぼモード */
.prob-wrap:has(.p1n--sak) { align-items: baseline; }
.p1-formula:has(.p1n--sak) { align-items: baseline; }
.p1n--sak {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  line-height: 1;
}
.p1-sak { display: block; }
.p1-sak-svg {
  display: block;
  width: calc(var(--C-nh, var(--C)) * 2.6);
  height: calc(var(--C-nh, var(--C)) * 1.1);
  color: #444;
  overflow: visible;
}
.p1o {
  font-size: calc(var(--C) * var(--op-scale, 1.0));
  font-weight: 700;
  color: #444;
}
.p1-ans {
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  min-width: calc(var(--C) * var(--ans-mw, 2.2));
  height: calc(var(--C) * var(--ans-h, 1.2));
  border-bottom: none;
  vertical-align: bottom;
}
.p1-ans-val {
  font-size: calc(var(--C) * 1.1);
  font-weight: 700;
  color: #e8786a;
  line-height: 1;
}

/* ── なぞり書きモード ── */
.print-sheet.trace-mode .p1n        { color: #ccc; }
.print-sheet.trace-mode .p1o        { color: #ccc; }
.print-sheet.trace-mode .p1-ans     { border-bottom-color: #ccc; }
.print-sheet.trace-mode .p1-ans-val { color: #ccc; }

/* ── 印刷 ── */
@page { size: A4 portrait; margin: 0; }
@media print {
  body { background: #fff; }
  .app { display: block; height: auto; }
  .panel { display: none; }
  .preview-area { padding: 0; overflow: visible; display: block; }
  .sheet-wrapper { width: auto !important; height: auto !important; }
  .print-sheet { box-shadow: none; margin: 0; width: 210mm; height: 297mm; overflow: visible; padding: 12mm 16mm; page-break-after: always; transform: none !important; }
  #sheetsContainer { gap: 0; }
  .print-sheet:last-child { page-break-after: avoid; }
  .problems-grid { min-height: var(--grid-min-h, 248mm); }
  .sheet-instruction { border: none; padding: 0; }
  .sheet-instruction.print-hide { display: none; }
  .sheet-title[contenteditable] { cursor: default; }
  .instruction-toolbar { display: none; }
  .no-print { display: none !important; }
}
.p1-ans-val { color: #e25c4a; font-weight: 700; }
@media print { .p1-ans-val { color: #e25c4a !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; } }