:root{font-family:-apple-system,BlinkMacSystemFont,"Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;color:#203c38;background:#eaf0e9;font-size:16px;line-height:1.7}*{box-sizing:border-box}body{margin:0;padding:36px 18px}main{max-width:520px;margin:5vh auto;background:#fff;padding:36px;border:1px solid #d9e3d8;border-radius:24px;box-shadow:0 16px 54px #264d3820}.hub{max-width:760px;margin:0 auto}.brand{font-size:14px;letter-spacing:.08em;font-weight:800}.brand span{font-size:12px;color:#52695f;border:1px solid #d4ded5;border-radius:24px;padding:4px 10px;margin-left:8px}h1{font-size:clamp(22px,4vw,30px);line-height:1.45;margin:26px 0 8px}.version{font-weight:700;color:#426d57;margin:0 0 24px}label{display:block;font-weight:700;margin:18px 0 8px}input{display:block;width:100%;font:inherit;min-height:52px;border:1px solid #93a79c;border-radius:12px;padding:10px 12px}button{font:inherit;cursor:pointer;width:100%;min-height:52px;border:0;border-radius:12px;padding:12px;margin-top:18px;background:#244e42;color:#fff;font-weight:700}button:disabled{opacity:.65;cursor:wait}button span{float:right}a{color:#244e42;text-underline-offset:3px}.note{font-size:13px;color:#596a63}.links{display:grid;grid-template-columns:1fr 1fr;gap:12px}.links a{border:1px solid #bccfc0;border-radius:16px;padding:20px;text-decoration:none;display:flex;flex-direction:column;justify-content:center;min-height:112px}.links a:last-child{grid-column:1/-1}.links strong{font-size:19px}.links span{font-size:13px;margin-top:6px;color:#52645c}.links .primary{background:#edf3e9}.sample{background:#f5f6f2;border-radius:16px;padding:18px 22px;margin:22px 0}h2{font-size:17px;margin:0}details{border-top:1px solid #d9e3d8;padding-top:18px}summary{cursor:pointer;font-weight:700}.old{display:grid;gap:12px;margin-top:18px}.secondary{background:white;color:#244e42;border:1px solid #bccfc0}#join-error{color:#9b302d;font-size:14px;overflow-wrap:anywhere}:focus-visible{outline:3px solid #b25d27;outline-offset:4px}@media(max-width:540px){body{padding:18px 12px}main{padding:24px 20px;border-radius:20px}.links{grid-template-columns:1fr}.links a:last-child{grid-column:auto}.sample{padding:18px}}