#bg-chord-dict{
    --paper:#F7F6F2; --card:#FFFFFF; --ink:#232730; --sub:#7A7E89;
    --line:#DDDBD3; --grid:#C7C4BA; --dot:#2E6E8E; --tonic:#D98032;
    --accent:#2E6E8E; --accent-soft:#E8F0F3; --ok:#3E9B6E;
    --mono:ui-monospace,"SF Mono",Menlo,monospace;
  }
#bg-chord-dict *{box-sizing:border-box;margin:0;padding:0}
#bg-chord-dict{background:var(--paper);color:var(--ink);
    font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",sans-serif;
    line-height:1.6;-webkit-font-smoothing:antialiased}
#bg-chord-dict .wrap{max-width:640px;margin:0 auto;padding:20px 16px 70px}
#bg-chord-dict header.top{border-bottom:2px solid var(--ink);padding-bottom:10px;margin-bottom:20px}
#bg-chord-dict header.top h1{font-size:19px;letter-spacing:.04em;color:var(--ink);
  margin:0;padding:0;font-weight:700;border:none;background:none}
#bg-chord-dict header.top p{font-size:12.5px;color:var(--sub);margin-top:4px}
#bg-chord-dict .block{margin-bottom:20px}
#bg-chord-dict .block-label{font-size:12px;color:var(--sub);letter-spacing:.05em;margin-bottom:8px}
#bg-chord-dict .accToggleRow{margin-bottom:16px}
#bg-chord-dict .accToggle{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}
#bg-chord-dict .accToggle button{font:inherit;font-size:13px;padding:8px 16px;border:none;
    background:var(--card);color:var(--sub);cursor:pointer}
#bg-chord-dict .accToggle button+button{border-left:1px solid var(--line)}
#bg-chord-dict .accToggle button[aria-pressed="true"]{background:var(--accent);color:#fff}
#bg-chord-dict .accToggle button:hover:not([aria-pressed="true"]){color:var(--accent)}
#bg-chord-dict .accToggle button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#bg-chord-dict .roots{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
#bg-chord-dict .roots button{font:inherit;font-size:15px;font-family:var(--mono);padding:10px 0;
    border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);
    cursor:pointer}
#bg-chord-dict .roots button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
#bg-chord-dict .roots button:hover{border-color:var(--accent)}
#bg-chord-dict .roots button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#bg-chord-dict .qgroup{margin-bottom:10px}
#bg-chord-dict .qgroup .gname{font-size:11.5px;color:var(--sub);margin-bottom:6px}
#bg-chord-dict .qgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(76px,1fr));gap:6px}
#bg-chord-dict .qgrid button{font:inherit;font-size:13px;padding:9px 4px;border:1px solid var(--line);
    border-radius:8px;background:var(--card);color:var(--ink);cursor:pointer}
#bg-chord-dict .qgrid button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
#bg-chord-dict .qgrid button:hover{border-color:var(--accent)}
#bg-chord-dict .qgrid button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#bg-chord-dict .qgrid button:disabled{opacity:.4;cursor:default;background:var(--paper)}
#bg-chord-dict .qgrid button:disabled:hover{border-color:var(--line)}
#bg-chord-dict .result{background:var(--card);border:1px solid var(--line);border-radius:14px;
    padding:20px 0 18px;text-align:center;overflow:hidden}
#bg-chord-dict .rname{font-family:var(--mono);font-size:30px;font-weight:700;letter-spacing:.01em;padding:0 18px}
#bg-chord-dict .rsub{font-size:12px;color:var(--sub);margin-top:2px;padding:0 18px}
#bg-chord-dict .playRow{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:12px}
#bg-chord-dict .poschips{display:flex;justify-content:center;flex-wrap:wrap;gap:6px;padding:0 14px;margin-top:12px}
#bg-chord-dict .poschips button{font:inherit;font-size:11.5px;padding:5px 11px;border-radius:20px;
    border:1px solid var(--line);background:var(--card);color:var(--sub);cursor:pointer}
#bg-chord-dict .poschips button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}
#bg-chord-dict .poschips button.active{background:var(--accent);border-color:var(--accent);color:#fff}
#bg-chord-dict .poschips button:disabled{opacity:.35;cursor:default}
#bg-chord-dict .poschips button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#bg-chord-dict .notesToggleRow{display:flex;align-items:center;justify-content:center;gap:8px;
    flex-wrap:wrap;margin-top:2px;font-size:12.5px;color:var(--sub)}
#bg-chord-dict .accToggle.mini{margin-left:6px}
#bg-chord-dict .accToggle.mini button{padding:4px 9px;font-size:11px}
#bg-chord-dict .switch{position:relative;width:36px;height:21px;flex:none}
#bg-chord-dict .switch input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}
#bg-chord-dict .switch .track{position:absolute;inset:0;background:var(--line);border-radius:12px;
    transition:background .15s}
#bg-chord-dict .switch .knob{position:absolute;top:2px;left:2px;width:17px;height:17px;border-radius:50%;
    background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.25);transition:transform .15s}
#bg-chord-dict .switch input:checked + .track{background:var(--accent)}
#bg-chord-dict .switch input:checked + .track .knob{transform:translateX(15px)}
#bg-chord-dict .switch input:focus-visible + .track{outline:2px solid var(--accent);outline-offset:2px}
#bg-chord-dict .carousel{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;padding:8px 0 0}
#bg-chord-dict .carousel::-webkit-scrollbar{display:none}
#bg-chord-dict .slide{flex:0 0 100%;scroll-snap-align:start;display:flex;flex-direction:column;
    align-items:center}
#bg-chord-dict svg.diag{display:block;margin:6px auto 4px}
#bg-chord-dict .optnote{font-size:11px;color:var(--sub);margin-top:6px;line-height:1.5}
#bg-chord-dict .navrow{display:flex;justify-content:center;align-items:center;gap:14px;margin-top:14px}
#bg-chord-dict .navbtn{width:30px;height:30px;border-radius:50%;border:1px solid var(--line);
    background:var(--card);color:var(--ink);font-size:15px;line-height:1;cursor:pointer;
    display:flex;align-items:center;justify-content:center;flex:none}
#bg-chord-dict .navbtn:hover{border-color:var(--accent);color:var(--accent)}
#bg-chord-dict .navbtn:disabled{opacity:.3;cursor:default}
#bg-chord-dict .navbtn:disabled:hover{border-color:var(--line);color:var(--ink)}
#bg-chord-dict .navbtn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#bg-chord-dict .dots{display:flex;justify-content:center;align-items:center;gap:8px}
#bg-chord-dict .dots button{width:8px;height:8px;padding:0;border-radius:50%;
    background:var(--card);border:1.5px solid var(--sub);cursor:pointer;flex:none}
#bg-chord-dict .dots button.active{background:var(--accent);border-color:var(--accent)}
#bg-chord-dict .dots button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
#bg-chord-dict .swipehint{font-size:11px;color:var(--sub);margin-top:8px}
#bg-chord-dict .empty{background:var(--card);border:1px dashed var(--line);border-radius:14px;
    padding:36px 18px;text-align:center;color:var(--sub);font-size:13.5px}
#bg-chord-dict footer.note{margin-top:22px;font-size:11.5px;color:var(--sub);line-height:1.7}
@media (max-width:400px){
#bg-chord-dict .roots{grid-template-columns:repeat(4,1fr)}
#bg-chord-dict .rname{font-size:26px}
}
@media (prefers-reduced-motion:reduce){
#bg-chord-dict *{transition:none!important}
}

/* ================================================================
   音源先読み中のローディング表示
   ================================================================ */
#bg-chord-dict.is-loading-audio .wrap > *:not(#cdictLoading){
  pointer-events: none;
  opacity: .35;
}
#cdictLoading{
  display: none;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 16px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  color: var(--sub);
  font-size: 13px;
}
#bg-chord-dict.is-loading-audio #cdictLoading{
  display: flex;
}
#cdictLoading .spinner{
  width: 16px; height: 16px; flex: none;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: cdict-spin .8s linear infinite;
}
@keyframes cdict-spin{ to { transform: rotate(360deg); } }

/* ================================================================
   SEO静的コンテンツセクション
   ================================================================ */

.cdict-seo-outer {
  --cdict-bg: #fbf8ef;
  --cdict-panel: #fffdf7;
  --cdict-line: #e7dfd2;
  --cdict-ink: #26323a;
  --cdict-muted: #6f7a80;
  --cdict-accent: #2E6E8E;
  background: var(--cdict-bg);
  padding: 20px 14px 48px;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans",
               "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--cdict-ink);
  box-sizing: border-box;
}

.cdict-seo-outer *,
.cdict-seo-outer *::before,
.cdict-seo-outer *::after {
  box-sizing: inherit;
}

.cdict-seo-wrap {
  display: grid;
  gap: 18px;
  width: min(100%, 980px);
  margin: 0 auto 24px;
}

.cdict-seo-card {
  padding: 28px 32px;
  border: 1px solid var(--cdict-line);
  border-radius: 24px;
  background: var(--cdict-panel);
  color: var(--cdict-ink);
  font-size: 15px;
  line-height: 1.85;
}

.cdict-seo-card-title {
  margin: 0 0 18px;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.3;
  color: var(--cdict-ink);
  border: none;
  padding: 0;
}

.cdict-seo-card p {
  margin: 0.85em 0;
}

.cdict-seo-card > p:first-of-type {
  margin-top: 0;
}

/* 折りたたみ(details/summary) */
.cdict-seo-details {
  margin: 14px 0;
  border: 1px solid var(--cdict-line);
  border-radius: 14px;
  background: var(--cdict-bg);
  overflow: hidden;
}

.cdict-seo-summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 44px 14px 18px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
  color: var(--cdict-ink);
  position: relative;
}

.cdict-seo-summary::-webkit-details-marker {
  display: none;
}

.cdict-seo-summary::after {
  content: "▾";
  position: absolute;
  right: 18px;
  top: 14px;
  color: var(--cdict-accent);
  transition: transform 0.15s ease;
}

.cdict-seo-details[open] > .cdict-seo-summary::after {
  transform: rotate(180deg);
}

.cdict-seo-summary:focus-visible {
  outline: 2px solid var(--cdict-accent);
  outline-offset: 2px;
}

.cdict-seo-details-body {
  padding: 0 18px 16px;
  font-size: 14px;
  color: var(--cdict-muted);
}

.cdict-seo-details-body p {
  margin: 0.7em 0;
}

.cdict-seo-details-body p:first-child {
  margin-top: 0;
}

/* モバイル */
@media (max-width: 560px) {
  .cdict-seo-outer {
    padding: 14px 10px 34px;
  }

  .cdict-seo-card {
    padding: 20px 18px;
  }
}