:root{--bg:#000;--text:#EDEBE4;--sub:#8C8A84;--primary:#6AA6F8;--line:#1f1f1f;--panel:#0C1420}
@media (prefers-color-scheme: light){:root{--bg:#F5F1E6;--text:#1E1C18;--sub:#6E6A60;--primary:#3E7FD6;--line:#E2DACA;--panel:#fff}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;line-height:1.85;-webkit-font-smoothing:antialiased}
main{max-width:720px;margin:0 auto;padding:40px 16px 80px}
header{display:flex;align-items:center;gap:10px;margin-bottom:28px}
header img{width:40px;height:40px;border-radius:10px}
header a{color:var(--text);text-decoration:none;font-weight:800;font-size:22px}
header a span{color:var(--primary)}
h1{font-size:26px;line-height:1.4;margin:0 0 8px}
h2{font-size:17px;margin:32px 0 6px}
p,li{font-size:15px}
.sub{color:var(--sub);font-size:13px}
a{color:var(--primary)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:18px 0}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);color:var(--sub);font-size:13px;display:flex;gap:16px;flex-wrap:wrap}
.plans{display:grid;gap:14px;margin:22px 0}
@media (min-width:640px){.plans{grid-template-columns:1fr 1fr}}
.plan{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.plan.top{border-color:var(--primary)}
.plan h2{margin:0 0 2px;font-size:19px}
.plan .for{margin:0 0 12px;color:var(--sub);font-size:13px}
.plan ul{margin:0;padding:0 0 0 1.1em}
.plan li{margin:6px 0}
.plan .soon{color:var(--sub);font-size:12px;border:1px solid var(--line);border-radius:99px;padding:1px 8px;margin-left:6px;white-space:nowrap}
.plan li .sub{display:block;line-height:1.65;margin-top:2px}
.form{display:grid;gap:14px}
.form-row{display:grid;gap:6px;font-weight:700;font-size:14px}
.form-row small{font-weight:400;color:var(--sub)}
.field{width:100%;box-sizing:border-box;background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:11px 12px;font:inherit;font-weight:400}
textarea.field{resize:vertical;line-height:1.7}
.field:focus-visible,.form-send:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.form-send{justify-self:start;background:var(--primary);color:#04122A;border:0;border-radius:999px;padding:11px 26px;font:inherit;font-weight:800;cursor:pointer}
.form-send:disabled{opacity:.5}
.form-err{color:#E5484D;font-size:13px;margin:0;min-height:1em}
.form-done{font-weight:800;font-size:18px;margin:0 0 6px}