:root{--bg-dark:#141414;--bg-light:#fff;--text-dark:#fff;--text-light:#141414;--bg:var(--bg-dark);--text:var(--text-dark)}[data-theme="light"]{--bg:var(--bg-light);--text:var(--text-light)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:'Noto Sans JP',sans-serif;background-color:var(--bg);color:var(--text);overflow-x:hidden;transition:background-color .3s ease , color .3s ease}.header{position:fixed;top:0;left:0;width:100%;z-index:1000;padding:20px 40px;display:flex;justify-content:space-between;align-items:center;transition:width .4s ease}.logo{display:flex;align-items:center}.logo img{height:24px;width:auto;transition:filter .3s ease}[data-theme="light"] .logo img{filter:invert(1)}.controls{display:flex;gap:20px;align-items:center}.control-btn{background:transparent;border:1px solid var(--text);color:var(--text);padding:8px 16px;font-family:'Noto Sans JP',sans-serif;font-size:.75rem;font-weight:700;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:.1em}.control-btn:hover{background:var(--text);color:var(--bg)}.control-btn.active{background:var(--text);color:var(--bg)}.fv-section{position:relative;height:150vh;margin:0;padding:0;border:none;background-color:var(--bg)}.fv-sticky{position:sticky;top:0;left:0;width:100%;height:100vh;display:flex;justify-content:center;align-items:center;overflow:hidden}.fv-code{font-family:'Google Sans Code','Consolas','Monaco',monospace;font-size:clamp(.9rem,1.8vw,1.4rem);line-height:2.2;color:var(--text);white-space:pre;padding:0 40px;max-width:100%;overflow:hidden}.fv-code-line{display:block;position:relative;clip-path:inset(0 100% 0 0);will-change:clip-path}.fv-code-line.is-visible{clip-path:inset(0 0 0 0)}.fv-code-line.is-typing::after{content:'|';color:var(--text);animation:fvCursorBlink .8s step-end infinite;margin-left:2px;font-weight:400}@keyframes fvCursorBlink {
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rgba(255,255,255,.15)}.footer-social li a{display:flex;justify-content:space-between;align-items:center;padding:16px 0;color:inherit;text-decoration:none;font-size:.9rem;transition:opacity .3s ease}.footer-social li a:hover{opacity:.6}.footer-social li a svg{width:14px;height:14px;opacity:.5}.footer-nav{flex:1;display:flex;flex-wrap:wrap;gap:40px}.footer-nav-col{min-width:100px}.footer-nav-title{display:block;font-size:.95rem;font-weight:700;color:inherit;text-decoration:none;margin-bottom:20px;transition:opacity .3s ease}.footer-nav-title:hover{opacity:.6}.footer-nav-list{list-style:none;padding:0;margin:0}.footer-nav-list li{margin-bottom:12px}.footer-nav-list li a{font-size:.85rem;color:inherit;text-decoration:none;opacity:.6;transition:opacity .3s ease}.footer-nav-list li a:hover{opacity:1}.footer-bottom{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:30px 0;border-top:1px solid rgba(20,20,20,.15)}[data-theme="light"] .footer-bottom{border-top:1px solid rgba(255,255,255,.15)}.footer-copyright{font-size:.8rem;opacity:.6}.footer-bottom-right{display:flex;align-items:center;gap:30px}.footer-privacy{font-size:.85rem;color:inherit;text-decoration:underline;text-underline-offset:3px;transition:opacity .3s ease}.footer-privacy:hover{opacity:.6}.footer-totop{padding:12px 24px;background-color:#141414;color:#fff;border:none;font-family:'Noto Sans JP',sans-serif;font-size:.85rem;cursor:pointer;transition:all .3s ease}[data-theme="light"] .footer-totop{background-color:#fff;color:#141414}.footer-totop:hover{background-color:#333}[data-theme="light"] .footer-totop:hover{background-color:#e0e0e0}@media (max-width:1024px){.footer-inner{flex-direction:column;gap:60px}.footer-info{flex:none;width:100%}.footer-nav{gap:30px 40px}}@media (max-width:768px){.footer{padding:60px 20px 0}.footer-inner{gap:50px;padding-bottom:50px}.footer-nav{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}.footer-nav-col{min-width:auto}.footer-bottom{flex-direction:column;gap:20px;padding:25px 0}.footer-bottom-right{width:100%;justify-content:space-between}}.author-profile{margin-top:4rem;margin-bottom:4rem;padding-top:3rem;border-top:1px solid var(--color-border,#e0e0e0)}.author-profile-inner{display:flex;flex-direction:column;gap:1.25rem}.author-profile-label{font-size:.75rem;font-weight:600;letter-spacing:.05em;color:var(--color-text-muted,#888);text-transform:uppercase}.author-profile-body{display:flex;gap:1.5rem;align-items:flex-start}.author-profile-avatar{flex-shrink:0;margin:0}.author-profile-avatar img{width:80px;height:80px;border-radius:50%;object-fit:cover}.author-profile-info{flex:1;min-width:0}.author-profile-name{margin:0 0 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