:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --border: #e3e8ef;
  --text: #1f2933;
  --muted: #6b7280;
  --stripe: #635bff;
  --stripe-dark: #4b43d9;
  --venmo: #3d95ce;
  --venmo-dark: #2f7ab0;
  --success: #16a34a;
  --danger: #dc2626;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: inherit;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

/* Header */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
}

.brand .logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  background: #111827;
}

.back-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.back-link:hover {
  color: var(--text);
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.05);
}

.card + .card {
  margin-top: 20px;
}

.card h2 {
  margin: 0 0 4px;
  font-size: 20px;
}

.card .sub {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
}

/* Landing */
.pick-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 560px) {
  .pick-grid {
    grid-template-columns: 1fr;
  }
}

.pick-card {
  display: block;
  text-decoration: none;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}

.pick-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.08);
}

.pick-card .provider-logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 14px;
}

.pick-card.stripe .provider-logo {
  background: var(--stripe);
}

.pick-card.venmo .provider-logo {
  background: var(--venmo);
}

.pick-card h3 {
  margin: 0 0 4px;
  font-size: 17px;
}

.pick-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* Forms */
label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #374151;
  margin: 0 0 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 560px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.field {
  margin-bottom: 16px;
}

.field.full {
  grid-column: 1 / -1;
}

input[type="text"],
input[type="number"],
input[type="password"],
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
  outline: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

input:focus,
select:focus {
  border-color: var(--stripe);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.12);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
}

.checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--stripe);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  transition: background 0.12s ease;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn.stripe {
  background: var(--stripe);
}

.btn.stripe:hover:not(:disabled) {
  background: var(--stripe-dark);
}

.btn.venmo {
  background: var(--venmo);
}

.btn.venmo:hover:not(:disabled) {
  background: var(--venmo-dark);
}

.btn.outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn.outline:hover {
  background: var(--bg);
}

.btn.sm {
  width: auto;
  padding: 8px 14px;
  font-size: 13px;
}

/* Method chips */
.methods {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.method-option {
  flex: 1;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  text-align: center;
  cursor: pointer;
  background: #fff;
  transition: border-color 0.12s ease, background 0.12s ease;
  user-select: none;
}

.method-option .m-title {
  font-weight: 700;
  font-size: 15px;
}

.method-option .m-desc {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.method-option.active {
  border-color: var(--stripe);
  background: rgba(99, 91, 255, 0.05);
}

.method-option.active.venmo {
  border-color: var(--venmo);
  background: rgba(61, 149, 206, 0.07);
}

/* Result */
.result {
  display: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #f9fafb;
  padding: 20px;
}

.result.visible {
  display: block;
}

.result .status-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.result .amount {
  font-size: 24px;
  font-weight: 800;
}

.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge.paid,
.badge.created {
  background: #dcfce7;
  color: #166534;
}

.badge.pending,
.badge.processing {
  background: #fef3c7;
  color: #92400e;
}

.badge.failed,
.badge.cancelled {
  background: #fee2e2;
  color: #991b1b;
}

.result .kv {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
  font-size: 13px;
  margin-bottom: 16px;
}

.result .kv .k {
  color: var(--muted);
}

.result .kv .v {
  font-weight: 600;
  word-break: break-all;
}

.result .pay-link {
  display: block;
  text-align: center;
  padding: 12px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}

.result .pay-link.stripe {
  background: var(--stripe);
}

.result .pay-link.stripe:hover {
  background: var(--stripe-dark);
}

.result .pay-link.venmo {
  background: var(--venmo);
}

.result .pay-link.venmo:hover {
  background: var(--venmo-dark);
}

.result .actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

/* Status box */
#status-result {
  margin-top: 16px;
  font-size: 14px;
}

/* Toast / error */
.error-banner {
  display: none;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 13px;
  margin-bottom: 20px;
  white-space: pre-wrap;
  word-break: break-word;
}

.error-banner.visible {
  display: block;
}

.spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner.visible {
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}