:root{font-family:"Yu Gothic",Meiryo,sans-serif;color:#243442;background:#f5f7fa}*{box-sizing:border-box}body{margin:0}header{background:#123f57;color:#fff;padding:20px 4%;display:flex;align-items:center;gap:20px;flex-wrap:wrap}header a{color:#fff}nav{display:flex;gap:24px;align-items:center}nav form{margin:0}main{max-width:1100px;margin:36px auto;padding:0 24px 60px}h1{font-size:26px}h2{font-size:20px;margin-top:32px}a{color:#126387}table{border-collapse:collapse;width:100%;background:#fff;margin:20px 0}th,td{padding:12px 16px;text-align:left;border-bottom:1px solid #d5dfe6}th{background:#e8eff4}form.panel{max-width:600px;background:#fff;padding:28px;border:1px solid #d5dfe6}label{display:block;margin:16px 0 6px}input{padding:10px;max-width:100%;font:inherit}input[type=email],input[type=password]{width:100%}button{padding:10px 18px;font:inherit;background:#126387;color:#fff;border:0;border-radius:4px;cursor:pointer}button:hover{background:#0b4d6a}.error{padding:16px;background:#ffeded;color:#8b2121}.notice{padding:16px;background:#e8f1fa}.dev{background:#ad2929;padding:3px 8px}.scroll{overflow-x:auto}details{background:#fff;padding:16px;margin:12px 0}summary{cursor:pointer;font-weight:bold}small{display:block;margin:12px 0;color:#526778}