:root {
  --blue: #00bfff;
  --blue-deep: #0096c8;
  --orange: #ff6b35;
  --ink: #1a1a1a;
  --gray: #5b6470;
  --line: #e2e8f0;
  --bg: #f4f7fa;
  --ok: #15803d;
  --err: #b91c1c;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ------------------------------------------------------------ top bar */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: var(--ink);
  color: #fff;
}

.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: #fff; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--blue), var(--blue-deep));
  color: #04212b;
  font-weight: 800;
  letter-spacing: .5px;
}

.brand-text { display: flex; flex-direction: column; font-weight: 700; line-height: 1.15; }
.brand-text small { font-weight: 400; font-size: 12px; color: #9fb3c0; letter-spacing: .2px; }

.secure-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 11px;
  border: 1px solid #35434e;
  border-radius: 999px;
  font-size: 12px;
  color: #9fe9ff;
}

/* -------------------------------------------------------------- layout */

.wrap { max-width: 660px; margin: 30px auto; padding: 0 16px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .05);
}

h1 { margin: 0 0 6px; font-size: 25px; letter-spacing: -.3px; }
h2 { margin: 0 0 6px; font-size: 22px; }
.lede { margin: 0 0 20px; color: var(--gray); }

/* ------------------------------------------------------------ services */

.services { display: grid; gap: 10px; }

.service {
  display: flex;
  align-items: center;
  gap: 13px;
  width: 100%;
  padding: 15px 16px;
  text-align: left;
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, transform .06s;
  font: inherit;
  color: inherit;
}

.service:hover { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0, 191, 255, .12); }
.service:active { transform: translateY(1px); }
.service:focus-visible { outline: 3px solid rgba(0, 191, 255, .5); outline-offset: 2px; }

.service-icon {
  display: grid; place-items: center;
  flex: 0 0 42px; height: 42px;
  border-radius: 11px;
  background: #e8f8ff;
  color: var(--blue-deep);
}

.service-name { font-weight: 650; }
.service-blurb { font-size: 13.5px; color: var(--gray); }
.service-arrow { margin-left: auto; color: #b6c2cd; }

.skeleton {
  height: 72px;
  border-radius: 12px;
  background: linear-gradient(90deg, #eef2f6 25%, #f7fafc 37%, #eef2f6 63%);
  background-size: 400% 100%;
  animation: shimmer 1.3s ease infinite;
}

@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }

/* --------------------------------------------------------------- form */

.back {
  display: inline-flex; align-items: center; gap: 4px;
  margin: -6px 0 16px -6px;
  padding: 6px;
  background: none; border: 0;
  color: var(--gray);
  font: inherit; font-size: 14px;
  cursor: pointer;
  border-radius: 8px;
}
.back:hover { color: var(--ink); background: #f1f5f9; }

.chosen {
  display: flex; align-items: center; gap: 13px;
  padding: 14px 16px;
  margin-bottom: 22px;
  background: #f7fbfd;
  border: 1px solid #d8ecf6;
  border-radius: 12px;
}
.chosen-icon { display: grid; place-items: center; flex: 0 0 40px; height: 40px; border-radius: 10px; background: #e8f8ff; color: var(--blue-deep); }
.chosen-name { font-weight: 700; }
.chosen-blurb { font-size: 13.5px; color: var(--gray); }

.field { display: block; margin-bottom: 18px; }
.label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 600; }
.label em { font-style: normal; font-weight: 400; color: var(--orange); font-size: 12.5px; }

input[type="text"], input[type="email"] {
  width: 100%;
  padding: 12px 13px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font: inherit;
  background: #fff;
  color: var(--ink);
}
input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0, 191, 255, .15); }

.amount-input { position: relative; }
.amount-input .currency {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--gray); font-size: 20px; font-weight: 600;
}
.amount-input input {
  padding: 15px 13px 15px 32px;
  font-size: 22px;
  font-weight: 650;
  letter-spacing: .3px;
}

.help { display: block; margin-top: 6px; font-size: 12.5px; color: var(--gray); }

.presets { display: flex; flex-wrap: wrap; gap: 8px; margin: -8px 0 18px; }
.preset {
  padding: 7px 13px;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font: inherit; font-size: 14px;
  cursor: pointer;
}
.preset:hover { border-color: var(--blue); }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 520px) { .row { grid-template-columns: 1fr; gap: 0; } }

.pay-btn {
  position: relative;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%;
  padding: 15px;
  border: 0;
  border-radius: 11px;
  background: linear-gradient(140deg, var(--blue), var(--blue-deep));
  color: #04212b;
  font: inherit; font-size: 17px; font-weight: 750;
  cursor: pointer;
  transition: filter .15s, transform .06s;
}
.pay-btn:hover { filter: brightness(1.06); }
.pay-btn:active { transform: translateY(1px); }
.pay-btn[disabled] { opacity: .6; cursor: progress; }

.spinner {
  width: 17px; height: 17px;
  border: 2.5px solid rgba(4, 33, 43, .3);
  border-top-color: #04212b;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.methods { margin: 12px 0 0; text-align: center; font-size: 13px; color: var(--gray); }

.alert {
  margin: 0 0 16px;
  padding: 11px 13px;
  border-radius: 10px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--err);
  font-size: 14.5px;
}

/* ------------------------------------------------------------ success */

.success { text-align: center; }
.check {
  display: grid; place-items: center;
  width: 62px; height: 62px;
  margin: 4px auto 14px;
  border-radius: 50%;
  background: #dcfce7;
  color: var(--ok);
}
.receipt-line { margin: 0; font-size: 30px; font-weight: 750; letter-spacing: -.5px; }
.receipt-meta { margin: 4px 0 18px; color: var(--gray); font-size: 14px; }

.ghost-btn {
  display: inline-block;
  padding: 11px 20px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}
.ghost-btn:hover { border-color: var(--blue); }

/* -------------------------------------------------------------- footer */

.foot { max-width: 660px; margin: 22px auto 44px; padding: 0 20px; color: var(--gray); font-size: 13px; text-align: center; }
.foot p { margin: 0 0 7px; }
.foot a { color: var(--blue-deep); }
.foot-legal { color: #93a1ae; font-size: 12px; }