:root{--bg:#ebebeb;--ink:#3a3a3a;--ink-soft:#3a3a3a73}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);min-height:100%;color:var(--ink);font-family:Zen Maru Gothic,Hiragino Sans,sans-serif;overflow-x:hidden}#app{background:var(--bg);width:100%;min-height:450vh;position:relative}#stage{pointer-events:none;width:100%;height:100%;display:block;position:fixed;inset:0}.scroll-track{z-index:0;position:absolute;inset:0}.ui-overlay{z-index:2;text-align:center;pointer-events:none;position:fixed;left:0;right:0}header.ui-overlay{top:clamp(1.25rem,4vh,2.5rem)}.hint{letter-spacing:.28em;text-transform:uppercase;color:var(--ink-soft);font-size:.78rem;font-weight:300;transition:opacity .6s}.hint.is-hidden{opacity:0}