:root{--bg: #0c0d12;--card-bg: #16171d;--card: #16171d;--card-hover: #1e1f27;--text: #f0f0f0;--text-primary: #f0f0f0;--text-secondary: #b0b0b0;--muted: #8a8a8a;--accent: #e94560;--border: #2a2b33;--error: #ff6b6b}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Noto Sans JP,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;overflow-x:hidden}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}.container{max-width:1400px;margin:0 auto;padding:0 20px}header{background:var(--card);border-bottom:1px solid var(--border);padding:16px 0;position:sticky;top:0;z-index:100}.header-content{display:flex;align-items:center;justify-content:space-between;gap:20px}.logo{font-size:1.4em;font-weight:700;color:var(--accent);display:flex;align-items:center;gap:8px;flex-wrap:wrap}.logo-img{border-radius:6px;flex-shrink:0}.logo-sub{font-size:.65em;font-weight:400;color:var(--muted);display:block}.desktop-nav{display:flex;gap:24px}.desktop-nav a{color:var(--muted);font-size:.95em}.desktop-nav a:hover{color:var(--text)}.mobile-menu-btn{display:none;flex-direction:column;gap:5px;padding:8px;background:transparent;border:none;cursor:pointer}.mobile-menu-btn span{display:block;width:24px;height:2px;background:var(--text);transition:.3s}.mobile-nav-overlay{display:none;position:fixed;inset:0;background:#000c;z-index:200;opacity:0;transition:opacity .3s}.mobile-nav-overlay.active{display:block;opacity:1}.mobile-nav{position:absolute;right:0;top:0;bottom:0;width:280px;max-width:80vw;background:var(--card);padding:20px;transform:translate(100%);transition:transform .3s}.mobile-nav-overlay.active .mobile-nav{transform:translate(0)}.mobile-close-btn{display:block;margin-left:auto;background:transparent;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:8px}.mobile-nav-links{display:flex;flex-direction:column;margin-top:20px}.mobile-nav-links a{padding:14px 16px;color:var(--text);border-radius:8px;font-size:1rem}.mobile-nav-links a:hover{background:var(--card-hover)}@media(max-width:768px){.desktop-nav{display:none}.mobile-menu-btn{display:flex}}.main-layout{display:grid;grid-template-columns:260px 1fr;gap:30px;padding:30px 0;max-width:100%;overflow-x:hidden}@media(max-width:900px){.main-layout{grid-template-columns:1fr}.sidebar{display:none}}.sidebar{position:sticky;top:80px;height:fit-content}.sidebar-section{background:var(--card);border-radius:12px;padding:16px;margin-bottom:16px}.sidebar-title{font-size:.85em;font-weight:700;color:var(--muted);margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px}.sidebar-link{display:block;padding:8px 12px;color:var(--text);border-radius:8px;font-size:.9em;margin-bottom:4px}.sidebar-link:hover,.sidebar-link.active{background:var(--card-hover)}.sidebar-link.active{color:var(--accent)}.page-title{font-size:1.6em;font-weight:700;margin-bottom:24px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;line-height:1.35;overflow-wrap:anywhere}footer{background:var(--card);border-top:1px solid var(--border);padding:30px 0 100px;margin-top:60px;text-align:center;color:var(--muted);font-size:.85em}.footer-links{display:flex;gap:16px;justify-content:center;margin-top:16px}.footer-links a{color:var(--muted);font-size:.8em}.footer-links a:hover{color:var(--accent)}@media(max-width:768px){.container{padding:0 12px}.main-layout{padding:16px 0;gap:16px}.page-title{font-size:1.2em;margin-bottom:16px}footer{padding-bottom:calc(80px + env(safe-area-inset-bottom,0px))}}.mobile-bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--card-bg);border-top:1px solid var(--border);padding:8px 0;padding-bottom:calc(8px + env(safe-area-inset-bottom,0px));z-index:1000;justify-content:space-around}@media(max-width:768px){.mobile-bottom-nav{display:flex}}.nav-item{display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;color:var(--muted);font-size:.7rem;padding:4px 8px;border-radius:8px;transition:color .2s;min-width:56px}.nav-item:hover{color:var(--accent)}.nav-icon{font-size:1.2rem}.nav-label{font-weight:500}