:root{--bg:#f6f8fc;--ink:#182a40;--muted:#596b7f;--navy:#123150;--blue:#175da3;--line:#dbe5ee}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font-family:system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;line-height:1.85}a{color:var(--blue)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #f6a233;outline-offset:2px}.wrap{max-width:970px;margin:auto;padding:0 22px}.mast{padding:35px 0;background:linear-gradient(100deg,#102c4e,#245f91);color:white}.mast a{color:white;text-decoration:none}.label{letter-spacing:.16em;color:#bce4ff;font-size:12px;font-weight:700}header h1{margin:.12em 0;font-size:clamp(27px,4vw,41px);line-height:1.3}nav{display:flex;gap:14px;padding:16px 0;flex-wrap:wrap}nav a{font-weight:650}main{padding:22px 0 55px}h2,h3{line-height:1.45}h2{margin-top:1.4em}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(265px,1fr));gap:16px}.tile,.prose,.notice{background:white;border:1px solid var(--line);border-radius:10px;padding:20px}.tile h2{margin:0 0 8px;font-size:19px}.tile p{color:var(--muted);font-size:14px}.prose{max-width:850px;margin:0 auto;padding:24px 30px}.prose h1{line-height:1.4}.muted{color:var(--muted)}.notice{border-left:4px solid var(--blue);background:#e9f3fc;margin:14px 0}pre{white-space:pre-wrap;word-break:break-word;background:#13293f;color:#f2f6ff;border-radius:8px;padding:16px;font-size:13px;line-height:1.55}code{background:#e8eef4;border-radius:3px;padding:2px 4px}.btn,button{border:0;border-radius:8px;background:#15588d;color:white;padding:10px 18px;font:inherit;cursor:pointer}.btn{display:inline-block;text-decoration:none}textarea,input,select{font:inherit;border:1px solid #a6b7c8;padding:10px;border-radius:6px;width:100%}label{display:block;margin:12px 0 6px;font-weight:650}table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid var(--line);padding:8px;text-align:left;font-size:14px}footer{border-top:1px solid var(--line);color:var(--muted);padding:24px 0;font-size:13px}.small{font-size:12px}.tag{display:inline-block;font-size:12px;padding:1px 9px;border:1px solid #c5d8e7;color:#4b667f;border-radius:16px}@media(max-width:550px){.prose{padding:18px 16px}}