:root{
  --ink:#e9eef7;
  --muted:#9fb0c7;
  --bg:#0f1320;
  --surface:#151a2c;
  --accent:#56b1ff;
  --accent-2:#7ef2c1;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;display:flex;flex-direction:column}
.site-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:linear-gradient(180deg,#111733,#0f1320)}
.site-head__brand{font-weight:800;letter-spacing:.2px}
.site-head__nav a{color:var(--muted);text-decoration:none;margin-left:16px}
.site-head__nav a:hover{color:var(--ink)}
.stage{flex:1;display:grid;gap:24px;padding:20px}
.intro{background:var(--surface);border:1px solid #202947;border-radius:14px;padding:20px;display:grid;gap:14px;max-width:920px;margin:0 auto}
.intro__title{margin:0;font-size:clamp(24px,5vw,36px)}
.intro__lead{margin:0;color:var(--muted)}
.lead{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.lead__row{display:grid}
.lead label{font-size:12px;color:var(--muted);margin-bottom:6px}
.lead input{font-size:16px;padding:12px;border-radius:10px;border:1px solid #2a3354;background:#0d1224;color:var(--ink);outline:none}
.lead input:focus{border-color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 14px;border-radius:10px;cursor:pointer;border:1px solid #2a3354;font-weight:700}
.btn--primary{background:linear-gradient(135deg,var(--accent),#4e86ff);color:white;border-color:transparent}
.btn--ghost{background:transparent;color:var(--ink)}
.ticks{display:flex;flex-wrap:wrap;gap:12px;padding:0;margin:0}
.ticks li{list-style:none;border:1px dashed #334066;color:var(--muted);padding:6px 10px;border-radius:999px}
.tiles{max-width:920px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.tile{background:var(--surface);border:1px solid #202947;border-radius:12px;padding:16px}
.tile h3{margin:0 0 6px}
.note{max-width:920px;margin:0 auto;background:#0e152b;border:1px solid #1d2747;border-radius:12px;padding:16px}
.steps{margin:0;padding-left:18px;color:var(--muted)}
.site-foot{padding:16px;text-align:center;color:var(--muted);font-size:14px}
.dialog{border:none;border-radius:14px;padding:18px;background:var(--surface);color:var(--ink);max-width:460px;width:92%}
.dialog__actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
@media (max-width:800px){.lead{grid-template-columns:1fr;gap:12px}}