:root{--paper:#FBF7F0;--ink:#2A2420;--ink2:#6F645C;--line:#ECE3D6;--accent:#2B4C9B}
@media (prefers-color-scheme:dark){:root{--paper:#16120F;--ink:#F3ECE1;--ink2:#B5AA9F;--line:#2E2722}}
*{box-sizing:border-box}
html{background:var(--paper);color:var(--ink);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Hiragino Sans","Segoe UI",Roboto,"Noto Sans JP",sans-serif}
body{margin:0 auto;max-width:720px;padding:0 20px}
a{color:var(--accent)}
@media (prefers-color-scheme:dark){a{color:color-mix(in srgb,var(--accent) 55%,white)}}
.top{padding:18px 0;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;text-decoration:none}
.brand img{border-radius:8px}
main{padding:28px 0 40px}
h1{font-size:30px;line-height:1.25;margin:0 0 8px}
h2{font-size:20px;margin:28px 0 8px}
.muted{color:var(--ink2);font-size:15px;margin-top:0}
ul{padding-left:22px}
li{margin:6px 0}
details{border-top:1px solid var(--line);padding:10px 0}
summary{cursor:pointer;font-weight:600}
.hero{text-align:center;padding-top:24px}
.hero .icon{border-radius:28px;box-shadow:0 8px 24px rgba(0,0,0,.12)}
.lead{font-size:21px;font-weight:600;margin:4px 0 16px}
.button{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:700;padding:12px 22px;border-radius:999px}
.soon{display:inline-block;border:1.5px solid var(--accent);color:var(--accent);font-weight:700;padding:10px 20px;border-radius:999px}
.foot{border-top:1px solid var(--line);padding:18px 0 32px;color:var(--ink2);font-size:14px;text-align:center}