:root{--bg:#f6f7fb;--card:#fff;--line:#d8dcea;--text:#1d2433;--muted:#667085;--accent:#276ef1;--danger:#c62828}
*{box-sizing:border-box} body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;background:var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line);background:#fff;gap:12px}.topbar h1{margin:0;font-size:24px}.sub{margin:4px 0 0;color:var(--muted);font-size:14px}
.menu-page main{padding:20px}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;cursor:pointer}.chip.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.study-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}.study-card{display:block;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;min-height:160px;box-shadow:0 2px 10px rgba(0,0,0,.04)}.study-card.disabled{opacity:.55}.study-card h2{font-size:18px;margin:8px 0}.meta{font-size:12px;color:var(--muted)}.open,.coming{margin-top:12px;font-weight:700;color:var(--accent)}
.viewer-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:16px;padding:16px;min-height:calc(100vh - 78px)}
.viewport-column{display:flex;flex-direction:column;gap:12px;min-width:0}
.thumb-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.viewport {
  position: relative;
  background: #101217;
  border-radius: 20px;
  overflow: hidden;
  border: 2px solid transparent;
  width: 100%;
}

.viewport.active {
  border-color: var(--accent);
}

/* 小さい枠は今まで通り正方形 */
.viewport.thumb {
  aspect-ratio: 1 / 1;
}

/* 大きい枠は少し縦長寄りにして、表示面積を増やす */
.viewport.large {
  aspect-ratio: 1.22 / 1;
  min-height: 700px;
  max-height: min(82vh, 1100px);
}

/* 画像をできるだけ大きく見せる */
.viewport img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.thumb{cursor:pointer}
.viewport canvas,.viewport svg{position:absolute;inset:0;width:100%;height:100%}
.plane-badge{position:absolute;left:12px;top:12px;background:rgba(0,0,0,.55);color:#fff;padding:6px 10px;border-radius:999px;font-size:12px}.slice-badge{position:absolute;right:12px;top:12px;background:rgba(0,0,0,.55);color:#fff;padding:6px 10px;border-radius:999px;font-size:12px}.crosshair{position:absolute;inset:0;pointer-events:none}
.empty-state{position:absolute;inset:0;display:grid;place-items:center;color:#c7d0e3;font-size:18px}
.control-bar{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px;flex-wrap:wrap}
.control-bar button{padding:10px 12px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer}
.control-bar input[type=range]{flex:1;min-width:220px;height:36px;accent-color:var(--accent);cursor:pointer}
.control-bar input[type=range]::-webkit-slider-thumb{width:24px;height:24px}
.sidebar{display:flex;flex-direction:column;gap:12px;max-height:calc(100vh - 110px);overflow:auto;padding-right:4px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}.info-card h2{margin:0 0 12px;font-size:18px}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:10px}.field input,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:12px}.preset-row{display:flex;flex-wrap:wrap;gap:8px}.preset{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;cursor:pointer}.editor-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.editor-actions button{padding:10px 12px;border:none;border-radius:12px;background:var(--accent);color:#fff;cursor:pointer}.editor-actions button:nth-child(2){background:#6b7280}.editor-actions button:nth-child(3){background:#1d4ed8}.editor-actions button:nth-child(4){background:#0f766e}.editor-actions button:nth-child(5){background:#7c3aed}.editor-help{font-size:13px;color:var(--muted);margin-bottom:8px}.switch{display:flex;align-items:center;gap:6px}.back-link{font-weight:700}.topbar-actions{display:flex;align-items:center;gap:14px}
.label-chip{display:inline-block;padding:4px 8px;background:#eef4ff;color:#174ea6;border-radius:999px;margin-bottom:8px;font-size:12px}.label-link{display:inline-block;margin-top:10px;color:var(--accent);font-weight:700}
.scroll-hint{font-size:12px;color:var(--muted);margin-left:auto}
@media (max-width: 980px){.viewer-layout{grid-template-columns:1fr}.viewport.large{max-height:none}.sidebar{order:-1;max-height:none;overflow:visible}}

.slice-rail {
  position: absolute;
  top: 16px;
  right: 10px;
  bottom: 16px;
  width: 56px;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
}

.slice-rail-inner {
  position: relative;
  width: 56px;
  height: 92%;
  min-height: 320px;
  max-height: 680px;
}

.slice-rail-track {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 12px;
  height: 100%;
  border-radius: 999px;
  background: rgba(255,255,255,0.28);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.18);
}

.slice-rail-fill {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 12px;
  border-radius: 999px;
  background: rgba(39,110,241,0.9);
}

.slice-rail-thumb {
  position: absolute;
  left: 50%;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  border: 2px solid rgba(39,110,241,0.95);
  box-shadow: 0 2px 8px rgba(0,0,0,0.28);
  cursor: grab;
  touch-action: none;
}

.slice-rail-thumb:active {
  cursor: grabbing;
}

.main-slice-badge {
  position: absolute;
  top: 10px;
  right: 74px;
  z-index: 8;
  font-size: 12px;
  color: white;
  background: rgba(0,0,0,0.48);
  padding: 4px 8px;
  border-radius: 999px;
}

.viewport {
  position: relative;
}

.slice-stepper {
  position: absolute;
  top: 34px;
  right: 74px;
  bottom: 34px;
  z-index: 8;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.slice-stepper-top,
.slice-stepper-bottom {
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: auto;
}

.slice-step-btn {
  min-width: 58px;
  min-height: 40px;
  border: none;
  border-radius: 12px;
  background: rgba(255,255,255,0.92);
  color: #1d2433;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
  cursor: pointer;
}

.slice-step-btn:active {
  transform: scale(0.98);
}

.viewport.large .slice-rail {
  right: 4px;
}

.viewport.large .slice-stepper {
  right: 64px;
}

.main-slice-badge {
  right: 64px;
}

.label-marker {
  cursor: pointer;
}

.label-marker-circle {
  fill: rgba(39,110,241,0.92);
  stroke: rgba(255,255,255,0.95);
  stroke-width: 2;
}

.label-marker-circle.is-faint {
  opacity: 0.45;
}

.label-marker-text {
  fill: white;
  paint-order: stroke;
  stroke: rgba(0,0,0,.8);
  stroke-width: 4;
  font-weight: 700;
}

.label-marker-text.is-faint {
  opacity: 0.6;
}

.selected-label-box {
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8faff;
  font-size: 14px;
  display: flex;
  align-items: center;
}

.selected-label-box.is-empty {
  color: var(--muted);
}

.editor-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}