:root {
  --bg: #f8f9fa;
  --card: #ffffff;
  --text: #212529;
  --muted: #6c757d;
  --accent: #0066cc;
  --border: #dee2e6;
  --good: #198754;
  --bad: #dc3545;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial; }

.site-header { padding: 24px 16px 16px; text-align: center; }
.site-header h1 { margin: 0; font-weight: 700; letter-spacing: .5px; }
.subtitle { margin: 6px 0 0; color: var(--muted); font-size: 16px; }
.description { 
  margin: 12px 0 0; 
  color: var(--muted); 
  font-size: 14px; 
  line-height: 1.5; 
  max-width: 600px; 
  margin-left: auto; 
  margin-right: auto;
}

main { max-width: 1100px; margin: 0 auto; padding: 8px 12px 32px; }

.tabs { display: flex; gap: 8px; padding: 8px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--bg); z-index: 10; }
.tab { background: transparent; color: var(--text); border: 1px solid var(--border); padding: 8px 12px; border-radius: 10px; cursor: pointer; }
.tab.is-active { background: var(--card); border-color: var(--accent); }

.panel { display: none; padding: 16px 0; }
.panel.is-active { display: block; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; box-shadow: 0 2px 8px rgba(0,0,0,.08); }
.card h2 { margin-top: 0; }

.row { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; align-items: end; margin: 12px 0; }
.row.compact { display: flex; gap: 16px; align-items: end; flex-wrap: wrap; }
.row.compact.right { justify-content: flex-end; }

@media (max-width: 700px) { 
  .row { grid-template-columns: 1fr; }
}

label { display: grid; gap: 6px; color: var(--muted); font-size: 14px; }
input[type="text"], input[type="number"], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: #ffffff; color: var(--text);
}
input[type="number"].short { width: 80px; }
textarea { resize: vertical; }

.label-with-help { position: relative; }
.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--muted);
  color: white;
  font-size: 11px;
  cursor: help;
  margin-left: 4px;
  vertical-align: super;
  font-weight: bold;
}
.help-icon:hover { background: var(--accent); }

.tooltip {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 0;
  margin-bottom: 8px;
  padding: 8px 12px;
  background: var(--text);
  color: var(--bg);
  border-radius: 6px;
  font-size: 12px;
  white-space: normal;
  width: 200px;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 20px;
  border-width: 4px;
  border-style: solid;
  border-color: var(--text) transparent transparent transparent;
}
.help-icon:hover + .tooltip,
.tooltip:hover { display: block; }

.btn { padding: 10px 14px; border-radius: 10px; border: 1px solid var(--accent); background: var(--accent); color: #ffffff; cursor: pointer; }
.btn:hover { background: #0052a3; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

canvas { 
  width: 100%; 
  aspect-ratio: 1;
  max-width: 100%;
  border: 1px solid var(--border); 
  border-radius: 12px; 
  background: #fafafa; 
  display: block;
}

/* canvas-containerに含まれていないcanvasの通常表示を保護 */
canvas:not(.canvas-container canvas) {
  display: block;
}

.mono { 
  background: #f6f8fa; 
  border: 1px solid var(--border); 
  border-radius: 10px; 
  padding: 10px; 
  font-family: 'Courier New', Courier, monospace;
  word-break: break-all;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

.metrics { display: flex; gap: 16px; margin-top: 12px; color: var(--muted); }

.badge-row { margin-top: 12px; }
.badge { display: inline-block; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--border); background: #f8f9fa; color: var(--muted); }
.badge.ok { border-color: var(--good); color: var(--good); }
.badge.ng { border-color: var(--bad); color: var(--bad); }

.footer { 
  margin: 28px auto; 
  padding: 24px 12px; 
  text-align: center; 
  color: var(--muted); 
  border-top: 1px solid var(--border); 
  max-width: 800px;
}
.footer p { margin: 8px 0; }
.footer-desc { 
  font-size: 14px; 
  line-height: 1.6;
  margin: 12px 0;
}
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

.diff-info { 
  background: #f8f9fa; 
  border: 1px solid var(--border); 
  border-radius: 10px; 
  padding: 12px; 
  margin: 12px 0;
}
.diff-info h4 { 
  margin: 0 0 8px 0; 
  color: var(--text);
}
.diff-item { 
  background: #fff; 
  border: 1px solid #e9ecef; 
  border-radius: 6px; 
  padding: 8px; 
  margin: 4px 0; 
  font-family: 'Courier New', Courier, monospace; 
  font-size: 13px;
}
.diff-highlight { 
  background-color: #fff3cd !important; 
  border: 1px solid #ffeaa7 !important;
}
.diff-display {
  min-height: 120px;
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: #f6f8fa;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.4;
}
.diff-char {
  background-color: #ffeb3b;
  padding: 1px 2px;
  border-radius: 2px;
  color: #000;
}
.setting-display {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.setting-display label {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}
.setting-value {
  padding: 8px 12px;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 14px;
  color: var(--text);
}

.glossary-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 16px;
}

.glossary-item {
  padding: 16px;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 10px;
  border-left: 4px solid var(--accent);
}

.glossary-item h3 {
  margin: 0 0 8px 0;
  color: var(--accent);
  font-size: 16px;
  font-weight: 600;
}

.glossary-item p {
  margin: 0;
  line-height: 1.5;
  color: var(--text);
}

/* 3D切り替えスイッチ */
.switch-container {
  display: flex;
  align-items: center;
  gap: 8px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent);
}

input:checked + .slider:before {
  transform: translateX(26px);
}

.switch-label {
  font-size: 14px;
  color: var(--text);
  user-select: none;
}

.canvas-container {
  position: relative;
  width: 400px;
  height: 400px;
  margin: 12px auto;
  display: inline-block;
}

.canvas-3d {
  width: 400px;
  height: 400px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fafafa;
  display: none;
}

.canvas-container canvas {
  display: block;
  width: 400px;
  height: 400px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fafafa;
}

.canvas-container .canvas-3d {
  position: absolute;
  top: 0;
  left: 0;
}

/* 3D表示中は2Dキャンバスを隠す */
.canvas-container.show-3d canvas {
  display: none;
}

.canvas-container.show-3d .canvas-3d {
  display: block;
}

/* Statistics Accordion */
.statistics-accordion {
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}

.statistics-accordion summary {
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  background: #f8f9fa;
  border-radius: 10px;
  user-select: none;
  display: flex;
  align-items: center;
}

.statistics-accordion summary:hover {
  background: #e9ecef;
}

.statistics-accordion summary::marker {
  content: '';
}

.statistics-accordion summary::before {
  content: '▶';
  margin-right: 8px;
  transition: transform 0.2s ease;
  font-size: 12px;
  color: var(--muted);
}

.statistics-accordion[open] summary::before {
  transform: rotate(90deg);
}

.statistics-accordion[open] summary {
  border-bottom: 1px solid var(--border);
  border-radius: 10px 10px 0 0;
}

.statistics-content {
  padding: 16px;
}

.statistics-content h4 {
  margin: 0 0 12px 0;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
}

/* Statistics Table */
.stats-table {
  background: #f8f9fa;
  border-radius: 8px;
  overflow: hidden;
}

.stats-table-content {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-family: 'Courier New', Courier, monospace;
}

.stats-table-content td {
  padding: 6px 12px;
  border-bottom: 1px solid #e9ecef;
  vertical-align: top;
}

.stats-table-content td:first-child {
  background: #ffffff;
  font-weight: 600;
  color: var(--muted);
  width: 120px;
}

.stats-table-content td:last-child {
  background: #ffffff;
  color: var(--text);
  text-align: right;
}

.stats-table-content tr:last-child td {
  border-bottom: none;
}

.stats-table-content tr:hover td {
  background: #f0f0f0;
}

@media (max-width: 700px) {
  .statistics-content .grid-2 {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .stats-table-content td:first-child {
    width: 100px;
    font-size: 12px;
  }
}