:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --shadow: rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: 100%;
  max-width: 480px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand {
  text-align: center;
  margin-bottom: 18px;
}

.brand-mark {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--accent);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  margin-bottom: 12px;
}

.brand-name {
  margin: 0;
  font-size: 30px;
  font-weight: 800;
}

.brand-copy {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.45;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  box-shadow: 0 18px 48px var(--shadow);
}

.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: #1e3a8a;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 800;
}

h1 {
  margin: 16px 0 6px;
  font-size: 25px;
  line-height: 1.2;
}

.amount {
  margin: 14px 0 18px;
  color: var(--accent);
  font-size: 34px;
  line-height: 1;
  font-weight: 800;
}

.details {
  margin: 0;
}

.detail-row {
  border-top: 1px solid var(--border);
  padding: 13px 0;
}

dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 5px;
}

dd {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.button {
  display: block;
  margin-top: 18px;
  border-radius: 16px;
  background: var(--accent);
  color: #ffffff;
  text-align: center;
  text-decoration: none;
  font-size: 18px;
  font-weight: 800;
  padding: 17px 18px;
}

.button[aria-disabled="true"] {
  background: #cbd5e1;
  pointer-events: none;
}

.hint {
  margin: 14px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
  line-height: 1.45;
}

.footer {
  margin: 16px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}