:root{color-scheme:dark;font-family:system-ui,-apple-system,"Noto Sans JP",sans-serif;background:#090e19;color:#f1f5ff}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 85% 0%,#14313c 0,transparent 48%)}main{max-width:1050px;margin:auto;padding:26px 22px 50px}a{color:#88e6d4;text-decoration:none}a:hover{text-decoration:underline}nav{display:flex;justify-content:space-between;gap:15px;font-size:12px}nav span,.muted,footer{color:#9daabd;font-size:13px}header{padding:65px 0 35px}.tag{color:#77e6cd;font-size:12px;letter-spacing:2px}h1{font-size:clamp(34px,6vw,64px);letter-spacing:-2px;line-height:1.2;margin:20px 0}p{color:#bbc7d7;line-height:1.8}.grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.card{padding:26px;border:1px solid #293548;border-radius:22px;background:#121b2ae8}h2{font-size:21px;margin:15px 0}small{font-size:13px;color:#9daabd}.coin{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:50%;background:#eeb75c;color:#121b2a;font-size:28px}.eth{background:#a5baff}.card>strong{font-size:clamp(24px,4vw,34px)}.calculator{margin-top:30px}.fields{margin:26px 0}label{font-size:13px;color:#bbc7d7}input{display:block;width:100%;margin-top:10px;padding:15px;border-radius:10px;border:1px solid #38475d;background:#090f1a;color:white;font:inherit;font-size:16px}input:focus{outline:2px solid #77e6cd}.result{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;background:#0b1320;padding:22px;border-radius:14px;font-size:13px}.result strong{display:block;font-size:24px;margin-top:10px}button{background:#203447;border:1px solid #415a6b;color:#dcfff7;border-radius:8px;padding:9px 14px;cursor:pointer}button:disabled{opacity:.5}.links{margin-top:26px}.link{display:block;padding:13px 0;border-bottom:1px solid #293548}footer{margin-top:30px}.up{color:#79e6bb}.down{color:#ffa6ac}@media(max-width:650px){.grid,.result{grid-template-columns:1fr}nav span{display:none}header{padding-top:42px}.card{padding:22px}.result strong{font-size:25px}}
