[hidden]{display:none!important}
:root{
  --bg:#f3f4f7; --surface:#ffffff; --ink:#151a2b; --muted:#5b6275; --line:#dfe2ea;
  --gi:#1f3a8a; --gi-soft:#e6ebf8; --tile-a:#1b2f86; --tile-b:#3a6ff0;
  --belt:#151a2b; --red:#c8322b; --red-soft:#fbeceb; --green:#1d7a52; --green-soft:#e5f3ec;
  --display:"Dela Gothic One","Hiragino Kaku Gothic StdN",system-ui,sans-serif;
  --body:"Zen Kaku Gothic New","Hiragino Sans","Noto Sans JP",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0f1220; --surface:#181c2e; --ink:#eceef5; --muted:#9aa1b6; --line:#2a3048;
  --gi:#8fa8f0; --gi-soft:#1f2747; --tile-a:#16245e; --tile-b:#2f5ad0;
  --belt:#eceef5; --red:#f0756e; --red-soft:#3a1f22; --green:#5fc995; --green-soft:#16302a; color-scheme:dark}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.75}
a{color:var(--gi)}
.wrap{max-width:760px;margin:0 auto;padding:28px 16px 64px;display:flex;flex-direction:column;gap:28px}
.narrow{max-width:440px}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--muted);display:flex;align-items:center;gap:10px}
.belt{display:inline-block;width:46px;height:10px;background:var(--belt);border-radius:2px;position:relative}
.belt::after{content:"";position:absolute;right:8px;top:0;width:12px;height:10px;background:var(--red)}
h1{font-family:var(--display);font-weight:400;font-size:clamp(28px,7vw,44px);line-height:1.25;margin:0;text-wrap:balance}
h2{font-family:var(--display);font-weight:400;font-size:22px;margin:0}
.concept{font-family:var(--display);font-size:clamp(18px,4.6vw,24px);color:var(--red);margin:0;text-wrap:balance}
.lead{color:var(--muted);margin:0;max-width:60ch}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;flex-direction:column;gap:12px}
.feats{display:grid;grid-template-columns:1fr;gap:10px;margin:0;padding:0;list-style:none}
@media (min-width:640px){.feats{grid-template-columns:1fr 1fr}}
.feats li{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.feats b{display:block;font-size:15px}
.feats span{font-size:13.5px;color:var(--muted)}
.plans{display:grid;grid-template-columns:1fr;gap:12px}
@media (min-width:640px){.plans{grid-template-columns:1fr 1fr}}
.plan{position:relative;border:2px solid var(--line);background:var(--surface);border-radius:14px;padding:18px;display:flex;flex-direction:column;gap:6px;text-align:left;font:inherit;color:inherit;cursor:pointer}
.plan[aria-pressed="true"]{border-color:var(--gi);box-shadow:0 0 0 3px var(--gi-soft)}
.plan:focus-visible{outline:2px solid var(--red);outline-offset:2px}
.plan .pl{font-weight:700}
.plan .pp{font-family:var(--display);font-size:28px;line-height:1.2}
.plan .pp small{font-family:var(--body);font-size:14px;color:var(--muted)}
.plan .bd{position:absolute;top:-10px;right:12px;background:var(--red);color:#fff;font-size:11.5px;font-weight:700;border-radius:999px;padding:1px 10px}
.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:0;border-radius:12px;background:var(--gi);color:var(--surface);font:inherit;font-weight:700;font-size:16px;padding:14px 18px;cursor:pointer;text-decoration:none}
.btn:disabled{opacity:.5;cursor:default}
.btn.sub{background:var(--surface);color:var(--ink);border:1px solid var(--line);font-size:14px;padding:10px 14px}
.btn:focus-visible{outline:2px solid var(--red);outline-offset:2px}
.note{font-size:12.5px;color:var(--muted);margin:0}
.msg{border-radius:10px;padding:10px 14px;font-size:14px}
.msg.ok{background:var(--green-soft);color:var(--green)}
.msg.err{background:var(--red-soft);color:var(--red)}
input[type=email]{width:100%;font:inherit;font-size:16px;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px}
input[type=email]:focus{outline:2px solid var(--gi);outline-offset:1px}
dl.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0}
dl.kv dt{color:var(--muted);font-size:13px}
dl.kv dd{margin:0;font-weight:700}
footer{font-size:12px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap}