:root{--bg:#041025;--panel:#071428;--muted:#9fb0c8;--accent:#1e6bff;--white:#eaf3ff}
*{box-sizing:border-box}
body{margin:0;background:linear-gradient(180deg,var(--bg),#071428);color:var(--white);font-family:Inter,system-ui,Arial}
.topbar{padding:14px;text-align:center;font-weight:800;color:var(--muted)}
.wrap{max-width:920px;margin:0 auto;padding:16px}
.hero{padding:22px;background:rgba(255,255,255,0.02);border-radius:16px;text-align:center}
h1{font-size:34px;margin:6px 0}
.lead{color:var(--muted);margin-bottom:18px}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{padding:12px 18px;border-radius:12px;border:0;cursor:pointer;font-weight:700}
.btn.primary{background:linear-gradient(90deg,var(--accent),#3aa0ff);box-shadow:0 8px 30px rgba(30,107,255,0.14)}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,0.06)}
.account{margin-top:12px;color:var(--muted);font-size:14px}
.foot{padding:18px;text-align:center;color:var(--muted)}

/* modal */
.modal{position:fixed;inset:0;display:flex;align-items:flex-end;justify-content:center;padding:12px;backdrop-filter:blur(6px)}
.modal.hidden{display:none}
.sheet{width:100%;max-width:640px;background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0.01));padding:18px;border-radius:18px;position:relative;animation:pop .28s ease}
.close{position:absolute;right:12px;top:8px;border:0;background:transparent;color:var(--muted);font-size:22px}
.step{transition:opacity .25s ease, transform .25s ease}
.step.hidden{display:none}
.spinner{width:48px;height:48px;border-radius:50%;border:5px solid rgba(255,255,255,0.06);border-top-color:var(--accent);margin:18px auto;animation:spin 1s linear infinite}
.success{color:#bff0c8;font-weight:700}

@keyframes pop{from{transform:translateY(8px);opacity:0}to{transform:translateY(0);opacity:1}}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:520px){h1{font-size:28px}}