:root{--bg: #080b0f;--bg2: #0e1318;--bg3: #141a22;--accent: #00e5ff;--accent2: #ff6b35;--text: #e8edf2;--muted: #9aafc4;--border: rgba(0,229,255,.12);--font-en: "Syne", sans-serif;--font-ja: "Noto Sans JP", sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:var(--font-ja);font-weight:300;line-height:1.8;overflow-x:hidden}main{display:block}#main-content{outline:none}.skip-link{position:fixed;top:.75rem;left:.75rem;z-index:200;background:var(--accent);color:#080b0f;font-size:.85rem;font-weight:700;text-decoration:none;padding:.55rem .85rem;border-radius:4px;transform:translateY(-140%);transition:transform .2s ease-out}.skip-link:focus-visible{transform:translateY(0)}nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:1.2rem 4rem;background:#080b0fd9;backdrop-filter:blur(12px);border-bottom:1px solid 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