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/* Full-length edition */
.header-controls{display:flex;align-items:center;gap:18px}.header-controls>button{font-size:12px;letter-spacing:.08em;padding:12px 4px}#index-open span{margin-left:12px}#auto[aria-pressed=true]{border-bottom:1px solid}.chapter{height:190svh}.chapter:last-child{height:100svh}.caption{position:fixed;top:auto;bottom:19vh;left:6vw;max-width:410px;z-index:4;visibility:hidden;transform:translateY(12px)}.caption.right{right:6vw;left:auto}.chapter.active .caption{visibility:visible}.caption h1,.caption h2{font-size:clamp(35px,4.8vw,72px);line-height:1.02;letter-spacing:-.055em;margin:20px 0}.caption span{display:block;max-width:320px;line-height:1.8;font-size:14px}.caption p{letter-spacing:.15em}.finale button{display:block;margin-top:16px}.chapter-nav nav button{width:23px}#scene-index{width:min(760px,94vw);background:#dce5d7}#scene-list{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}#scene-list button{display:flex;text-align:left;justify-content:space-between;gap:12px;padding:17px 0;border-bottom:1px solid #738b8b55;font-size:12px;letter-spacing:.035em}#scene-list button span:first-child{opacity:.5}#scene-list button:hover{color:#ba4057}#index-close{display:block;margin-left:auto;font-size:12px}#scene-index h2{font-size:44px;line-height:1.05}#scene-index>p{font-size:12px;letter-spacing:.1em}.chapter-nav{gap:14px}#chapter-name{min-width:145px}.finale{top:auto}.spark-target{transition:transform .6s}#spark:hover .spark-target{transform:scale(1.1)}
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/* ★2026-09-21 直し：旅が始まる前に、章の文字が開始画面と重なって出ていた。
   #journey は visibility:hidden だが、.chapter.active .caption{visibility:visible}
   が子側で打ち消していたため。body.started が付くまでは出さない。 */
body:not(.started) .chapter .caption{visibility:hidden}