:root {
  --color-text: #1c1d21;
  --color-text-secondary: #6b6f76;
  --color-borders: #e2e3e6;
  --color-surface: #ffffff;
  --color-background: #f6f6f7;
  --color-primary: #3390ec;
  --color-primary-hover: #2a7fd6;
  --color-primary-soft: #e8f2fd;
  --color-error: #d9363e;
  --color-success: #2e9e5b;
  --color-warning-bg: #fff8e1;
  --color-warning-text: #6d5400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #f1f1f3;
    --color-text-secondary: #a0a3aa;
    --color-borders: #33353b;
    --color-surface: #1c1d21;
    --color-background: #131417;
    --color-primary-soft: #1d3147;
    --color-warning-bg: #3a3218;
    --color-warning-text: #f2d98a;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.9375rem;
  line-height: 1.45;
  color: var(--color-text);
  background: var(--color-background);
}

.topbar {
  display: flex;
  gap: 1rem;
  align-items: center;
  height: 3.75rem;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--color-borders);
  background: var(--color-surface);
}

.brand {
  display: inline-flex;
  flex-shrink: 0;
  gap: 0.5rem;
  align-items: center;
  color: var(--color-text);
  text-decoration: none;
}

.brandMark { display: block; width: 2rem; height: 2rem; }

.brandName {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
}

.topbarTitle {
  overflow: hidden;
  flex: 1;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.secure {
  display: flex;
  flex-shrink: 0;
  gap: 0.25rem;
  align-items: center;
  font-size: 0.8125rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.secureIcon { width: 1rem; height: 1rem; fill: currentColor; }

.testBanner {
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  text-align: center;
  color: var(--color-warning-text);
  background: var(--color-warning-bg);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20rem;
  gap: 2rem;
  align-items: start;
  max-width: 62rem;
  margin: 2rem auto;
  padding: 0 1rem;
}

.main, .summary {
  padding: 1.75rem;
  border: 1px solid var(--color-borders);
  border-radius: 0.75rem;
  background: var(--color-surface);
}

.loading { display: flex; justify-content: center; padding: 3rem 0; }

.stepTitle {
  margin: 0 0 0.25rem;
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
}

.stepTitleSpaced { margin-top: 2rem; }

.stepText {
  margin: 0 0 1.25rem;
  color: var(--color-text-secondary);
}

.field { display: block; margin-bottom: 1rem; }

.fieldLabel {
  display: block;
  margin-bottom: 0.375rem;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
}

.fieldHint {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.input {
  width: 100%;
  height: 2.75rem;
  padding: 0 0.75rem;
  border: 1px solid var(--color-borders);
  border-radius: 0.5rem;
  font: inherit;
  color: inherit;
  background: var(--color-surface);
}

.input:focus { border-color: var(--color-primary); outline: none; box-shadow: 0 0 0 3px var(--color-primary-soft); }

.methods { display: grid; gap: 0.75rem; }

.method {
  cursor: pointer;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 1rem;
  border: 1px solid var(--color-borders);
  border-radius: 0.625rem;
}

.method:has(.methodRadio:checked) { border-color: var(--color-primary); background: var(--color-primary-soft); }

.methodRadio { flex-shrink: 0; width: 1.125rem; height: 1.125rem; margin: 0.125rem 0 0; accent-color: var(--color-primary); }

.methodBody { display: flex; flex-direction: column; gap: 0.125rem; }

.methodTitle { font-weight: var(--font-weight-semibold); }

.methodText { font-size: 0.875rem; color: var(--color-text-secondary); }

.banks { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }

.bank {
  cursor: pointer;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-borders);
  border-radius: 1.25rem;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
}

.bank:has(.bankRadio:checked) { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-soft); }

.bankRadio { position: absolute; opacity: 0; pointer-events: none; }

.error { margin: 1rem 0 0; font-size: 0.875rem; color: var(--color-error); }

.submit {
  cursor: pointer;
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.875rem 1rem;
  border: none;
  border-radius: 0.625rem;
  font: inherit;
  font-weight: var(--font-weight-semibold);
  color: #ffffff;
  text-align: center;
  text-decoration: none;
  background: var(--color-primary);
}

.submit:hover { background: var(--color-primary-hover); }
.submit:disabled { cursor: default; opacity: 0.6; }

.fineprint { margin: 1rem 0 0; font-size: 0.8125rem; color: var(--color-text-secondary); }

.qrFrame {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 16.5rem;
  margin: 0 auto;
  padding: 1rem;
  border: 1px solid var(--color-borders);
  border-radius: 0.75rem;
  background: #ffffff;
}

.qrBrand { font-size: 1.25rem; font-weight: var(--font-weight-semibold); color: #000000; letter-spacing: 0.08em; }

.qrImage { display: block; width: 14rem; height: 14rem; margin: 0.5rem 0; image-rendering: pixelated; }

.qrAmount { font-size: 1.125rem; font-weight: var(--font-weight-semibold); color: #000000; }

.account { padding: 1rem 1.25rem; border: 1px solid var(--color-borders); border-radius: 0.75rem; }

.accountLabel { font-size: 0.8125rem; color: var(--color-text-secondary); }

.accountRow { display: flex; gap: 0.75rem; align-items: center; justify-content: space-between; margin-bottom: 0.75rem; }

.accountNumber { font-size: 1.375rem; font-weight: var(--font-weight-semibold); letter-spacing: 0.04em; word-break: break-all; }

.accountAmount { font-size: 1.125rem; font-weight: var(--font-weight-semibold); }

.copy, .textButton {
  cursor: pointer;
  flex-shrink: 0;
  padding: 0.375rem 0.75rem;
  border: none;
  border-radius: 0.5rem;
  font: inherit;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background: none;
}

.copy:hover, .textButton:hover { background: var(--color-primary-soft); }

.textButton { display: block; margin: 1rem auto 0; }

.status {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
  margin-top: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.statusExpired { color: var(--color-error); text-align: center; }

.simulate {
  display: block;
  margin-top: 1rem;
  padding: 0.625rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-warning-text);
  text-align: center;
  background: var(--color-warning-bg);
}

.paid { text-align: center; }

.paidIcon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  margin: 0.5rem auto 1rem;
  border-radius: 50%;
  background: var(--color-success);
}

.paidIcon svg { width: 2rem; height: 2rem; fill: #ffffff; }

.planTitle { margin: 0; font-size: 1.25rem; font-weight: var(--font-weight-semibold); }

.planBilling { font-size: 0.875rem; color: var(--color-text-secondary); }

.planIncludesTitle { margin-top: 1.25rem; font-size: 0.875rem; font-weight: var(--font-weight-semibold); }

.planFeature { display: flex; gap: 0.5rem; align-items: flex-start; margin-top: 0.5rem; font-size: 0.875rem; }

.planFeatureIcon { flex-shrink: 0; width: 1.125rem; height: 1.125rem; fill: var(--color-success); }

.planDivider { height: 1px; margin: 1.25rem 0; background: var(--color-borders); }

.planLine { display: flex; gap: 1rem; justify-content: space-between; font-size: 0.875rem; }

.planTotal { margin-top: 0.75rem; font-size: 1rem; font-weight: var(--font-weight-semibold); }

.spinner {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--color-borders);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinnerSmall { width: 1rem; height: 1rem; border-width: 2px; }

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

@media (max-width: 760px) {
  .topbar { padding: 0 1rem; }
  .topbarTitle, .secure { display: none; }
  .testBanner { padding: 0.625rem 1rem; }
  .layout { grid-template-columns: minmax(0, 1fr); gap: 1rem; margin: 1rem auto; }
  .summary { order: -1; }
  .main, .summary { padding: 1.25rem; }
}