:root {
  --blue: #00a9df;
  --blue-dark: #087da9;
  --navy: #172b4d;
  --navy-soft: #20314d;
  --text: #344563;
  --muted: #6b778c;
  --border: #dfe7ef;
  --green: #00a651;
  --green-dark: #008d45;
  --warning-bg: #fff9e8;
  --warning-text: #634800;
  --panel-bg: #071521;
  --shadow: rgba(23, 43, 77, 0.12);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 169, 223, 0.12), transparent 30%),
    linear-gradient(135deg, #eef9ff 0%, #f7f9fc 42%, #ffffff 100%);
  font-family: "Nunito Sans", Arial, sans-serif;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 6vw, 92px);
  border-bottom: 1px solid rgba(23, 43, 77, 0.08);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
}

.brand {
  color: var(--blue);
  font-size: 34px;
  font-weight: 900;
  letter-spacing: -2px;
}

.badge {
  padding: 8px 12px;
  border: 1px solid rgba(8, 125, 169, 0.22);
  border-radius: 999px;
  color: var(--blue-dark);
  background: rgba(0, 169, 223, 0.08);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.container {
  width: min(1120px, calc(100% - 36px));
  margin: 42px auto 34px;
}

.intro {
  max-width: 760px;
  margin-bottom: 30px;
}

.eyebrow {
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 10px 0 12px;
  color: var(--navy);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.08;
}

.intro p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(270px, 0.85fr);
  gap: 22px;
  align-items: start;
}

.card,
.panel {
  border-radius: var(--radius);
  box-shadow: 0 16px 32px var(--shadow);
}

.card {
  padding: 28px 28px 24px;
  border: 1px solid rgba(223, 231, 239, 0.9);
  background: rgba(255, 255, 255, 0.95);
}

.card h2,
.panel h2 {
  margin: 0 0 6px;
  font-size: 21px;
  font-weight: 800;
}

.card h2 {
  color: var(--navy);
}

.panel h2 {
  color: #ffffff;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 13px;
  font-weight: 800;
}

.hostedfield {
  height: 50px;
  padding: 13px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #ffffff;
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}

.hostedfield:hover {
  border-color: #b7c5d4;
}

.hostedfield.HiPayField--focused {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(0, 169, 223, 0.12);
  transform: translateY(-1px);
}

.hostedfield.HiPayField--valid {
  border-color: #28a477;
  box-shadow: 0 0 0 3px rgba(40, 164, 119, 0.1);
}

.hostedfield.HiPayField--invalid {
  border-color: #e5484d;
  box-shadow: 0 0 0 3px rgba(229, 72, 77, 0.09);
}

.help {
  margin-top: 7px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.actions {
  margin-top: 24px;
}

button {
  width: 100%;
  padding: 14px 18px;
  border: 0;
  border-radius: 10px;
  color: #ffffff;
  background: linear-gradient(135deg, var(--green) 0%, #17b36d 100%);
  box-shadow: 0 12px 24px rgba(0, 166, 81, 0.22);
  cursor: pointer;
  font: inherit;
  font-size: 15px;
  font-weight: 800;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

button:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--green-dark) 0%, #0f9a5d 100%);
  box-shadow: 0 14px 28px rgba(0, 166, 81, 0.28);
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.7;
  background: linear-gradient(135deg, #bac6d1 0%, #9da9b6 100%);
  box-shadow: none;
  cursor: not-allowed;
}

.status {
  min-height: 24px;
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}

.panel {
  padding: 26px 24px 22px;
  background: linear-gradient(180deg, var(--navy-soft) 0%, var(--navy) 100%);
  color: #ffffff;
}

.panel p {
  color: #c4d0dc;
  font-size: 13px;
  line-height: 1.6;
}

dl {
  margin: 20px 0 0;
}

dt {
  margin-top: 14px;
  color: #8edcf5;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

dd {
  margin: 6px 0 0;
  color: #ffffff;
  font-size: 13px;
  overflow-wrap: anywhere;
}

.result {
  display: none;
  max-height: 300px;
  margin-top: 22px;
  padding: 14px;
  overflow: auto;
  border: 1px solid rgba(142, 220, 245, 0.25);
  border-radius: 10px;
  background: var(--panel-bg);
}

.result.visible {
  display: block;
}

pre {
  margin: 0;
  color: #d7f5ff;
  font: 11px/1.5 Consolas, Monaco, monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.notice {
  margin-top: 22px;
  padding: 14px 15px;
  border-left: 4px solid #f0a000;
  border-radius: 10px;
  color: var(--warning-text);
  background: var(--warning-bg);
  font-size: 12px;
  line-height: 1.5;
}

footer {
  margin: 30px 0 20px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 780px) {
  .container {
    margin-top: 28px;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .card,
  .panel {
    padding: 21px;
  }

  .topbar {
    height: 70px;
  }
}