/*
 * STL 輪郭切断スライサー「CutStack」v2.3
 * Copyright (c) 2026 Hiroyuki Muramatsu / FabLab Nagano
 * https://gijyutu.com/main/
 * Released under the MIT License
 */
:root{
  --bg:#f3f4f6; --panel:#fff; --border:#d1d5db; --text:#111827; --muted:#6b7280;
  --accent:#111827; --blue:#2563eb; --red:#dc2626; --green:#059669; --orange:#ea580c;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg)}
.app{max-width:1800px;margin:0 auto;padding:20px}
.header{margin-bottom:20px}
.header h1{margin:0 0 6px;font-size:28px}
.header p{margin:0;color:var(--muted)}
.layout{display:grid;grid-template-columns:360px 1fr 520px;gap:16px}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:16px;min-width:0}
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;margin-bottom:6px;font-weight:600}
.field input[type="number"], .field input[type="file"]{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px}
.field select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px;background:#fff;color:var(--text);cursor:pointer;appearance:auto}
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 12px}
.buttons{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
button{border:1px solid var(--border);background:#fff;color:var(--text);border-radius:12px;padding:10px 14px;cursor:pointer;font-size:14px}
button:hover{background:#f9fafb}
button:disabled{opacity:.5;cursor:not-allowed}
#runButton{background:var(--accent);color:#fff;border-color:var(--accent)}
.info-box{border:1px solid var(--border);border-radius:12px;background:#f9fafb;padding:12px;font-size:14px;line-height:1.7;margin-bottom:12px}
.status{min-height:52px;white-space:pre-wrap;font-size:13px;color:var(--muted);border:1px solid var(--border);border-radius:12px;padding:12px;background:#fcfcfc}
.panel-header{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:10px}
.legend{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
.legend-item{font-size:12px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.swatch{width:24px;height:0;border-top-width:2px;border-top-style:solid}
.swatch-black{border-color:#000}
.swatch-red-solid{border-color:rgb(255,0,0)}
.swatch-blue-solid{border-color:rgb(0,0,255)}
.swatch-blue-dash{border-color:var(--blue);border-top-style:dashed}
.swatch-red-dash{border-color:var(--red);border-top-style:dashed}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.dot-orange{background:var(--orange)}
.svg-wrap{border:1px solid var(--border);border-radius:12px;background:#fff;height:680px;overflow:hidden;position:relative;cursor:grab}
.svg-wrap.grabbing{cursor:grabbing}
.svg-wrap.small{height:auto;min-height:260px;margin-top:6px;margin-bottom:12px;overflow:auto;cursor:default}
.svg-wrap>svg{display:block;width:100%;height:100%;position:absolute;top:0;left:0}
.svg-wrap.small>svg{position:static;max-width:100%;height:auto}
.zoom-controls{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.zoom-label{font-size:13px;color:var(--muted);min-width:60px;text-align:right}
.improvement-box{border:1px solid var(--border);border-radius:12px;padding:12px;background:#fafafa;font-size:14px;line-height:1.7}
.improvement-box.critical{background:#fef2f2;border-color:#fecaca}
.improvement-box.good{background:#ecfdf5;border-color:#a7f3d0}
.subhead{font-size:15px;margin:14px 0 8px}
.table-wrap{border:1px solid var(--border);border-radius:12px;overflow:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
thead{background:#f9fafb}
th,td{text-align:left;border-bottom:1px solid #e5e7eb;padding:10px 12px}
tbody tr:last-child td{border-bottom:0}
.state-closed{color:var(--green);font-weight:700}
.state-open{color:var(--red);font-weight:700}
.compare-panels{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.compare-caption{font-size:12px;color:var(--muted);margin-bottom:4px}
.badge-worst{color:var(--orange);font-weight:700}
.slice-nav{justify-content:space-between;margin-top:8px;margin-bottom:4px}
@media (max-width:1420px){
  .layout{grid-template-columns:1fr}
  .svg-wrap{min-height:520px}
  .compare-panels{grid-template-columns:1fr}
}
.diag-controls{display:flex;flex-direction:column;gap:8px;margin-top:8px}
.diag-toggles{display:flex;gap:16px;font-size:13px;flex-wrap:wrap}
.diag-toggles label{display:flex;align-items:center;gap:6px;cursor:pointer}
.btn-3d{background:var(--accent);color:#fff;border-color:var(--accent);margin-left:8px}
.btn-3d:hover{background:#374151}
.btn-3d.active{background:#2563eb;border-color:#2563eb}
.canvas3d{border:1px solid var(--border);border-radius:12px;background:#1a1a2e;width:100%;height:680px;display:block;cursor:grab}
.canvas3d.grabbing{cursor:grabbing}

/* ---- モード選択画面 ---- */
.mode-select-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg);padding:40px 20px}
.mode-select-screen h1{font-size:32px;margin:0 0 8px;text-align:center}
.mode-select-screen p{color:var(--muted);margin:0 0 48px;text-align:center;font-size:16px}
.mode-cards{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}
.mode-card{background:var(--panel);border:2px solid var(--border);border-radius:20px;padding:36px 32px;width:300px;cursor:pointer;transition:border-color .15s,box-shadow .15s;text-decoration:none;color:var(--text);display:flex;flex-direction:column;gap:12px}
.mode-card:hover{border-color:var(--accent);box-shadow:0 4px 20px rgba(0,0,0,.1)}
.mode-card.card-simple:hover{border-color:var(--blue)}
.mode-card h2{margin:0;font-size:20px}
.mode-card .card-icon{font-size:40px;line-height:1}
.mode-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
.mode-card ul{margin:0;padding-left:18px;color:var(--muted);font-size:13px;line-height:1.8}
.mode-card .card-btn{margin-top:8px;background:var(--accent);color:#fff;border:none;border-radius:12px;padding:12px;font-size:15px;cursor:pointer;font-weight:600;text-align:center}
.mode-card.card-simple .card-btn{background:var(--blue)}
/* ---- モードバッジ・切り替えリンク ---- */
.mode-badge{font-size:13px;font-weight:600;background:#f3f4f6;color:var(--muted);border:1px solid var(--border);border-radius:8px;padding:2px 10px;vertical-align:middle;margin-left:8px}
.mode-switch-link{font-size:13px;color:var(--blue);text-decoration:none;margin-left:16px;border:1px solid var(--blue);border-radius:8px;padding:2px 10px}
.mode-switch-link:hover{background:var(--blue);color:#fff}
/* ---- シンプル版レイアウト ---- */
.layout-simple{display:grid;grid-template-columns:300px 1fr;gap:16px}
.simple-controls{display:flex;flex-direction:column;gap:12px}