:root {
  --bg: #f6f9fc;
  --card: #ffffff;
  --text: #1a1f36;
  --muted: #697386;
  --accent: #635bff;
  --accent-hover: #5147e5;
  --border: #e3e8ee;
  --ok: #30b566;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
.brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 24px;
}
.card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 0 0 1px var(--border), 0 2px 5px rgba(60, 66, 87, 0.08), 0 15px 35px rgba(60, 66, 87, 0.08);
}
.label { color: var(--muted); font-size: 14px; margin: 0 0 4px; }
.amount { font-size: 40px; font-weight: 600; letter-spacing: -0.02em; margin: 0 0 4px; }
.desc { color: var(--muted); font-size: 14px; margin: 0; }
.rows { margin: 24px 0; border-top: 1px solid var(--border); }
.row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.row span:first-child { color: var(--muted); }
.row.total { font-weight: 600; }
.row.total span:first-child { color: var(--text); }
.btn {
  display: block;
  width: 100%;
  padding: 12px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
  transition: background 0.15s;
}
.btn:hover { background: var(--accent-hover); }
.secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  margin: 16px 0 0;
}
.footer { color: var(--muted); font-size: 12px; margin: 24px 0 0; text-align: center; }
.footer a { color: var(--muted); }
.check {
  width: 48px; height: 48px; margin: 0 0 20px;
  border-radius: 50%;
  background: var(--ok);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
}
h1 { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 8px; }
a.link { color: var(--accent); text-decoration: none; }
a.link:hover { text-decoration: underline; }
@media (max-width: 480px) { .card { padding: 24px; } }