:root{--bg:#f5f7f8;--panel:#ffffff;--ink:#14202b;--muted:#5d6b78;--line:#e1e6ea;--brand:#0f2a3d;--accent:#12a37f;--accent-ink:#ffffff;--bad:#c0392b;--warn:#b7791f;--radius:12px}@media (prefers-color-scheme:dark){:root{--bg:#0d1419;--panel:#142029;--ink:#e6edf2;--muted:#93a3b1;--line:#24323d;--brand:#e6edf2;--accent:#2ec79c;--accent-ink:#06231a;--bad:#ff6b5b;--warn:#f0b04a}}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:Hiragino Kaku Gothic ProN,Noto Sans JP,system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:15px;-webkit-font-smoothing:antialiased}a{color:inherit}.wrap{max-width:1040px;margin:0 auto;padding:0 16px}.top{border-bottom:1px solid var(--line);background:var(--panel);position:-webkit-sticky;position:sticky;top:0;z-index:10}.top .wrap{gap:16px;height:56px}.logo,.top .wrap{display:flex;align-items:center}.logo{font-weight:800;letter-spacing:.02em;text-decoration:none;gap:8px}.logo .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 25%,transparent)}.top nav{display:flex;gap:4px;margin-left:auto;align-items:center;flex-wrap:wrap}.linkbtn,.top nav a{text-decoration:none;padding:6px 10px;border-radius:8px;color:var(--muted);font-size:14px;background:none;border:0;font:inherit;cursor:pointer}.linkbtn:hover,.top nav a:hover{background:color-mix(in srgb,var(--ink) 6%,transparent);color:var(--ink)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);padding:10px 18px;border-radius:10px;font:inherit;font-weight:700;cursor:pointer;text-decoration:none}.btn:disabled{opacity:.6;cursor:default}.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}.btn.block{width:100%}label.field{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:6px}input[type=email],input[type=text],select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:var(--panel);color:var(--ink)}.check{display:flex;gap:10px;align-items:flex-start;font-size:14px}.check input{margin-top:5px}.note{color:var(--muted);font-size:13px}.msg{padding:10px 12px;border-radius:10px;font-size:14px}.msg.ok{background:color-mix(in srgb,var(--accent) 14%,transparent)}.msg.err{background:color-mix(in srgb,var(--bad) 14%,transparent)}.or{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px;margin:18px 0}.or:after,.or:before{content:"";flex:1 1;height:1px;background:var(--line)}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.page{padding:28px 0 64px}.page h1{font-size:22px;margin:0 0 16px}.empty{text-align:center;padding:48px 20px}.empty h2{margin:0 0 8px;font-size:18px}.empty p{color:var(--muted);margin:0 0 20px}.hero{padding:64px 0 40px}.hero .eyebrow{color:var(--accent);font-weight:700;font-size:14px;letter-spacing:.06em}.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.3;margin:8px 0 16px;letter-spacing:-.01em}.hero p.lead{font-size:17px;color:var(--muted);max-width:640px;margin:0 0 24px}.safe{display:flex;flex-wrap:wrap;gap:8px 16px;margin:20px 0 0;padding:0;list-style:none;font-size:14px;color:var(--muted)}.safe li:before{content:"✓";color:var(--accent);font-weight:800;margin-right:6px}.features{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:16px;gap:16px;padding:16px 0 48px}.features h3{margin:0 0 6px;font-size:16px}.features p{margin:0;color:var(--muted);font-size:14px}@media (max-width:760px){.features{grid-template-columns:1fr}}.foot{border-top:1px solid var(--line);padding:24px 0 40px;font-size:13px;color:var(--muted)}.foot .wrap{display:flex;gap:16px;flex-wrap:wrap}.auth{max-width:420px;margin:48px auto}.auth h1{font-size:22px;margin:0 0 6px}.auth .lead{color:var(--muted);margin:0 0 20px;font-size:14px}.stack>*+*{margin-top:14px}