:root{--ink:#f7f5ef;--muted:#aeb4c4;--paper:#080910;--panel:#141725;--line:#303347;--cyan:#58f2d5;--pink:#ff537f}
*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--ink);background:radial-gradient(circle at 78% 4%,#342151 0,transparent 34rem),radial-gradient(circle at 5% 80%,#123e4d 0,transparent 28rem),var(--paper);font-family:Inter,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif}.shell{width:min(820px,calc(100% - 36px));margin:auto}main{padding:58px 0 80px}h1{margin:0 0 18px;font-size:clamp(34px,7vw,56px);letter-spacing:-.055em}main>p{margin:0 0 36px;color:var(--muted);font-size:13px;line-height:1.9}.card{padding:26px;border:1px solid var(--line);border-radius:18px;background:#141725e8;box-shadow:0 24px 70px #0007}.card+ .card{margin-top:14px}h2{margin:0 0 12px;font-size:19px}.card p,.card li{color:#bcc1ce;font-size:13px;line-height:1.9}.card ul{margin:0;padding-left:22px}.card strong{color:#fff}.note{padding:13px 15px;border-left:3px solid var(--cyan);background:#58f2d50c}footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;padding:24px 0 36px;border-top:1px solid #ffffff14;color:#777d8c;font-size:10px}footer nav{display:flex;flex-wrap:wrap;gap:14px}footer a{color:#aeb4c4;text-decoration:none}a:hover{color:var(--cyan)}@media(max-width:600px){main{padding:40px 0 60px}.card{padding:20px}}