*{box-sizing:border-box}body{margin:0;font-family:"Yu Gothic",Meiryo,sans-serif;background:#eaf0f4;color:#213b4c}header{display:flex;align-items:center;gap:18px;padding:15px 22px;background:white;flex-wrap:wrap;border-bottom:1px solid #cedee8}a{color:#1b7fbd;text-decoration:none;font-size:12px}header>a:first-child{font-size:22px;font-weight:700;margin-right:8px}header>span{font-size:13px}.device-buttons{display:flex;gap:4px}.device-buttons button{border:1px solid #b8d5e6;padding:9px 20px;min-height:42px;background:white;color:#155580;font:inherit;font-size:12px;cursor:pointer}.device-buttons button[aria-pressed=true]{background:#1b7fbd;color:white;border-color:#1b7fbd}label{font-size:11px;display:flex;align-items:center;gap:8px}select{font:inherit;padding:10px;border:1px solid #b8d5e6;max-width:220px}#open-page{margin-left:auto;text-decoration:underline;text-underline-offset:4px}.preview-note{margin:12px 20px;font-size:11px;line-height:1.8}#preview-area{padding:6px 16px 30px;overflow:hidden}#frame-shell{margin:auto;position:relative;background:white;box-shadow:0 3px 18px #173a5526}iframe{border:0;display:block;transform-origin:top left;background:white}#frame-shell.mobile{border:5px solid #24465b;border-radius:22px;overflow:hidden}@media(max-width:600px){header{gap:10px;padding:12px}header>a:first-child{font-size:18px}header>span{font-size:11px}.device-buttons button{padding:8px 17px}label{width:100%}select{flex:1;max-width:none}#open-page{margin-left:0}#preview-area{padding:4px 10px 25px}.preview-note{margin:10px 14px}}