:root {
  --bg: #0a0e1a;
  --panel: #121829;
  --panel-2: #1a2236;
  --border: #232d45;
  --text: #eaf0ff;
  --muted: #8b98b8;
  --accent: #00e6a0;
  --accent-2: #ffb300;
  --danger: #ff4d5e;
  --ok: #22c55e;
  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 800px at 50% -10%, #13203a, var(--bg) 60%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.app {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.screen {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--panel-2);
  border-radius: 18px;
  padding: 28px 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,.45);
  animation: fade .25s ease;
}

@keyframes fade { from { opacity: 0; transform: translateY(6px);} to {opacity:1; transform:none;} }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.brand .logo {
  width: 40px; height: 40px;
  border-radius: 11px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), #00bfe6);
  color: #06251c;
  font-weight: 800;
  font-size: 18px;
  flex: none;
}
.brand h1 { font-size: 20px; letter-spacing: .5px; }

h2 { font-size: 20px; margin-bottom: 6px; }
.sub { color: var(--muted); font-size: 13.5px; line-height: 1.5; margin-bottom: 20px; }
.sub a { color: var(--accent); text-decoration: none; }

label { display: block; font-size: 12.5px; color: var(--muted); margin: 14px 0 6px; }
input {
  width: 100%;
  padding: 12px 14px;
  background: var(--panel-2);
  border: 1px solid var(--panel-2);
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border .15s;
}
input:focus { border-color: var(--accent); }
input[data-mask]{ letter-spacing: 1px; font-family: ui-monospace, monospace; }

.gap { height: 8px; }
.mt { margin-top: 18px; }
.block { width: 100%; }

.btn {
  padding: 13px 16px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .08s ease, opacity .15s, background .15s;
}
.btn:active { transform: scale(.985); }
.btn.primary { background: var(--accent); color: #06251c; }
.btn.primary:hover { background: #00ffb2; }
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn.ghost:hover { color: var(--text); border-color: var(--accent); }
.btn.pay { background: linear-gradient(135deg, var(--accent-2), #ff7b00); color: #241500; }
.btn.pay:hover { filter: brightness(1.08); }

.sandbox {
  margin-top: 14px;
  font-size: 11.5px;
  color: var(--muted);
  border-top: 1px dashed var(--border);
  padding-top: 12px;
  text-align: center;
  line-height: 1.5;
}

.unlock-card {
  background: linear-gradient(135deg, var(--panel-2), #182240);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  margin: 16px 0 4px;
}
.uc-label { font-size: 12px; color: var(--muted); letter-spacing: 1px; text-transform: uppercase; }
.uc-amount { font-size: 34px; font-weight: 800; color: var(--accent); margin: 6px 0; }

.methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 6px; }
.method {
  padding: 11px 6px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.method.active {
  border-color: var(--accent);
  background: rgba(0,230,160,.1);
  color: var(--accent);
}

#methodPane { margin-top: 6px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.bank { display: grid; gap: 8px; margin-top: 10px; }
.bank > div {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--panel); border: 1px solid var(--border);
  padding: 10px 12px; border-radius: 9px; font-size: 13px;
}
.bank span { color: var(--muted); }
.bank b { color: var(--text); font-variant-numeric: tabular-nums; }
.bank .copyable { cursor: pointer; transition: border-color .15s; }
.bank .copyable:hover { border-color: var(--accent); }

.ussd-code {
  margin-top: 12px;
  background: var(--panel); border: 1px dashed var(--accent);
  border-radius: 12px; padding: 16px;
  text-align: center; font-size: 20px; font-weight: 800;
  letter-spacing: 2px; color: var(--accent);
  font-family: ui-monospace, monospace;
}

.badge {
  display: inline-block;
  font-size: 11px; font-weight: 800; letter-spacing: 1.5px;
  padding: 7px 14px; border-radius: 999px;
}
.badge.proc { background: rgba(255,179,0,.12); color: var(--accent-2); border: 1px solid rgba(255,179,0,.4); }
.badge.done { background: rgba(34,197,94,.12); color: var(--ok); border: 1px solid rgba(34,197,94,.4); }

.countdown {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  margin: 18px 0;
}
.cd-value {
  font-size: 40px; font-weight: 800; color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, monospace;
  letter-spacing: 1px; font-variant-numeric: tabular-nums;
}
.cd-label { font-size: 11px; color: var(--muted); letter-spacing: 2px; text-transform: uppercase; margin-top: 4px; }
.cd-track { height: 8px; border-radius: 999px; background: var(--panel-2); margin-top: 14px; overflow: hidden; }
.cd-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); width: 0%; border-radius: 999px; transition: width 1s linear; }

.receipt { display: grid; gap: 8px; }
.receipt > div {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--panel); border: 1px solid var(--border);
  padding: 11px 14px; border-radius: 9px; font-size: 13.5px;
}
.receipt span { color: var(--muted); }
.receipt b { color: var(--text); font-variant-numeric: tabular-nums; word-break: break-all; text-align: right; }
.receipt .st { color: var(--accent-2); }

.toast {
  position: fixed; left: 50%; bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: #1a2236; color: var(--text);
  padding: 12px 20px; border-radius: 999px;
  border: 1px solid var(--accent);
  font-size: 14px; font-weight: 600;
  opacity: 0; pointer-events: none;
  transition: all .25s ease; z-index: 50;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.overlay {
  position: fixed; inset: 0;
  background: rgba(5, 8, 16, .7);
  backdrop-filter: blur(3px);
  display: grid; place-items: center;
  z-index: 100;
  animation: fade .2s ease;
}
.modal {
  width: calc(100% - 48px);
  max-width: 340px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,.5);
}
.modal-icon {
  width: 48px; height: 48px;
  margin: 0 auto 14px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255, 77, 94, .14);
  color: var(--danger);
  font-size: 26px; font-weight: 800;
  border: 1px solid rgba(255, 77, 94, .4);
}
.modal-msg { font-size: 16px; font-weight: 600; color: var(--text); line-height: 1.4; margin-bottom: 20px; }

@media (max-width: 420px){
  .screen { padding: 22px 18px; }
  .cd-value { font-size: 34px; }
}