:root{--ink:#1a2333;--ink-2:#4a5568;--ink-3:#8593a8;--surface:#f6f8fb;--card:#ffffff;--line:#e3e9f1;--accent:#2a78d6;--accent-weak:#cde2fb;--danger:#b42318;--ok:#067647}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;background:var(--surface);color:var(--ink);font-size:14px}a{color:var(--accent);text-decoration:none}.shell{min-height:100vh}.nav,.shell{display:flex}.nav{width:210px;background:#14213d;color:#dbe4f0;padding:16px 0;flex-shrink:0;flex-direction:column}.nav .brand{font-weight:700;padding:6px 18px 16px;color:#fff;font-size:15px}.nav a{display:block;padding:9px 18px;color:#b9c6d9}.nav a.active,.nav a:hover{background:#1d2f55;color:#fff}.nav .me{margin-top:auto;padding:12px 18px;font-size:12px;color:#8fa2be;border-top:1px solid #24365e}.nav .me button{margin-top:6px}.main{flex:1 1;padding:26px 32px;max-width:1100px}h1{font-size:20px;margin:0 0 18px}h2{font-size:15px;margin:22px 0 10px}.card{background:var(--card);border:1px solid 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