:root{
  --bg:#0B0F1A;
  --card: rgba(255,255,255,.08);
  --card2: rgba(255,255,255,.12);
  --stroke: rgba(255,255,255,.14);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.65);
  --primary:#6C7CFF;
  --mint:#2EF2C8;
  --danger:#ff5c7a;
  --radius:28px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 20% 20%, rgba(108,124,255,.28), transparent 60%),
    radial-gradient(900px 600px at 80% 30%, rgba(46,242,200,.18), transparent 65%),
    radial-gradient(900px 600px at 60% 90%, rgba(255,92,122,.10), transparent 60%),
    var(--bg);
}

.container{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:32px;
}

.card{
  width:min(980px, 92vw);
  padding:44px 42px;
  border-radius:var(--radius);
  background: linear-gradient(180deg, var(--card), rgba(255,255,255,.05));
  border:1px solid var(--stroke);
  box-shadow: 0 30px 120px rgba(0,0,0,.45);
  backdrop-filter: blur(14px);
}

.header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand{
  display:flex; align-items:center; gap:14px;
}
.logo{
  width:52px; height:52px; border-radius:16px;
  background: linear-gradient(135deg, rgba(108,124,255,.9), rgba(46,242,200,.7));
  box-shadow: 0 16px 50px rgba(108,124,255,.25);
}
h1{
  margin:0;
  font-size: clamp(40px, 4vw, 64px);
  letter-spacing:-.02em;
}
p{margin:10px 0 0; color:var(--muted); font-size: clamp(16px, 1.5vw, 22px)}
.row{display:flex; gap:18px; flex-wrap:wrap; margin-top:28px}

.btn{
  appearance:none;
  border:1px solid var(--stroke);
  background: rgba(255,255,255,.06);
  color:var(--text);
  padding:18px 22px;
  border-radius:22px;
  font-weight:700;
  font-size: 20px;
  cursor:pointer;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.btn:hover{transform: translateY(-1px); border-color: rgba(255,255,255,.22); background: rgba(255,255,255,.09)}
.btn.primary{
  border: none;
  background: linear-gradient(135deg, rgba(108,124,255,1), rgba(46,242,200,.9));
  color:#071018;
}
.btn.primary:hover{transform: translateY(-1px) scale(1.01)}
.btn.link{
  background:transparent;
  border:1px solid transparent;
  color:var(--muted);
}
.btn.link:hover{background:rgba(255,255,255,.05); border-color: rgba(255,255,255,.10); color:var(--text)}
.grid2{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap:18px;
  margin-top:22px;
}
@media (max-width: 820px){
  .grid2{grid-template-columns:1fr}
  .card{padding:32px 22px}
}

.paycard{
  padding:22px;
  border-radius:24px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  cursor:pointer;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.paycard:hover{transform: translateY(-2px); background: rgba(255,255,255,.09); border-color: rgba(255,255,255,.20)}
.paytitle{font-size:26px; margin:0 0 6px; font-weight:850}
.paysub{margin:0; color:var(--muted)}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--muted);
  font-weight:650;
}

.slider{
  margin-top:26px;
  position:relative;
  height:84px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  overflow:hidden;
}
.slider .hint{
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  color: rgba(255,255,255,.75);
  font-weight:800;
  letter-spacing:.06em;
  text-transform:uppercase;
  user-select:none;
}
.slider .thumb{
  position:absolute; top:7px; left:7px;
  width:70px; height:70px;
  border-radius:999px;
  background: linear-gradient(135deg, rgba(108,124,255,1), rgba(46,242,200,.9));
  box-shadow: 0 16px 50px rgba(108,124,255,.25);
  cursor:grab;
  display:flex; align-items:center; justify-content:center;
  color:#071018;
  font-weight:900;
  user-select:none;
}
.small{font-size:16px;color:var(--muted);margin-top:16px}
.center{display:flex; align-items:center; justify-content:center; flex-direction:column; text-align:center}
.qrbox{
  margin-top:18px;
  width:min(420px, 78vw);
  aspect-ratio: 1/1;
  border-radius:28px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  display:flex; align-items:center; justify-content:center;
}
input{
  width:100%;
  padding:18px 18px;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.06);
  color:var(--text);
  font-size:20px;
  outline:none;
}
input:focus{border-color: rgba(108,124,255,.7)}
.alert{
  margin-top:14px;
  padding:14px 16px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,92,122,.10);
}
.success{background: rgba(46,242,200,.10)}