:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --ink: #1c2430;
  --muted: #5b6776;
  --line: #e6ebf2;
  --card: #ffffff;
  --acid: #1a4db3;
  --acid-ink: #ffffff;
  --cyan: #0f3a8f;
  --danger: #c43c2c;
  --font: "Noto Sans SC", "PingFang SC", sans-serif;
  --display: "Noto Sans SC", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
}

.checkout-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
  font-family: var(--display);
  font-weight: 800;
}

.mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--acid);
  color: #fff;
  font-size: 0.7rem;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.checkout-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.85fr);
  gap: clamp(1rem, 3vw, 2rem);
  max-width: 1080px;
  margin: 0 auto;
  padding: clamp(1.2rem, 3vw, 2rem);
}

.checkout-main h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  letter-spacing: -0.03em;
}

.lede {
  margin: 0.45rem 0 1.3rem;
  color: var(--muted);
  max-width: 42ch;
}

.checkout-form,
.checkout-summary {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  box-shadow: 0 10px 40px rgba(18, 20, 26, 0.04);
}

.checkout-form {
  padding: 1.2rem 1.2rem 1.35rem;
  display: grid;
  gap: 1.15rem;
}

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  gap: 0.75rem;
}

legend {
  margin-bottom: 0.15rem;
  font-weight: 700;
  font-size: 0.95rem;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}

input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

input:focus,
select:focus {
  outline: 2px solid rgba(26, 77, 179, 0.45);
  outline-offset: 1px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.9fr;
  gap: 0.75rem;
}

.pay-fieldset #card-container {
  min-height: 90px;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fafbfc;
}

.pay-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.fineprint {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.fineprint code {
  font-size: 0.76rem;
  background: #e8f0ff;
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

.pay-btn {
  border: 0;
  border-radius: 999px;
  padding: 0.95rem 1.2rem;
  background: var(--ink);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 120ms ease, background 160ms ease;
}

.pay-btn:hover:not(:disabled) {
  background: #000;
}

.pay-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.pay-btn:active:not(:disabled) {
  transform: scale(0.99);
}

.form-error {
  margin: 0;
  color: var(--danger);
  font-size: 0.88rem;
  font-weight: 600;
}

.checkout-summary {
  padding: 1.15rem 1.15rem 1.3rem;
  align-self: start;
  position: sticky;
  top: 5rem;
}

.checkout-summary h2 {
  margin: 0 0 0.9rem;
  font-size: 1rem;
}

.summary-items {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.summary-row {
  display: grid;
  grid-template-columns: 3.4rem 1fr auto;
  gap: 0.7rem;
  align-items: center;
}

.summary-row img {
  width: 3.4rem;
  height: 3.4rem;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.summary-row strong {
  display: block;
  font-size: 0.88rem;
}

.summary-row span {
  color: var(--muted);
  font-size: 0.78rem;
}

.summary-row em {
  font-style: normal;
  font-weight: 700;
  font-size: 0.9rem;
}

.totals {
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.45rem;
}

.totals > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
}

.totals dt {
  margin: 0;
  color: var(--muted);
}

.totals dd {
  margin: 0;
  font-weight: 650;
}

.total-row {
  margin-top: 0.25rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--line);
  font-size: 1.05rem;
}

.total-row dt,
.total-row dd {
  color: var(--ink);
  font-weight: 800;
}

.assurances {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.assurances li {
  padding-left: 0.85rem;
  border-left: 2px solid var(--acid);
}

.back-shop {
  display: inline-block;
  margin-top: 1rem;
  color: var(--cyan);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.88rem;
}

@media (max-width: 900px) {
  .checkout-layout {
    grid-template-columns: 1fr;
  }

  .checkout-summary {
    position: static;
    order: -1;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .trust-strip {
    display: none;
  }
}

.demo-pay-box {
  border: 1px dashed var(--line);
  border-radius: 0.65rem;
  padding: 1rem;
  background: #f5f7fb;
  color: var(--muted);
  font-size: 0.95rem;
}

.checkout-kicker { color: #1a4db3; font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; }
.optional { color: #6c7481; font-size: 12px; font-weight: 500; }
.checkout-policies { display: grid; gap: 12px; margin-bottom: 18px; }
.checkout-policies article { border: 1px solid #dfe4ec; border-radius: 10px; padding: 14px; background: #f8faff; }
.checkout-policies article > strong { display: block; margin-bottom: 8px; }
.checkout-policies dl { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 7px 18px; }
.checkout-policies dl div { display: grid; grid-template-columns: 120px 1fr; gap: 8px; }
.checkout-policies dt { color: #687184; font-size: 12px; }
.checkout-policies dd { margin: 0; font-size: 12px; }
.consent-row { display: grid !important; grid-template-columns: 22px 1fr; align-items: start; gap: 10px !important; padding: 12px 0; font-weight: 500 !important; line-height: 1.5; }
.consent-row input { width: 20px !important; height: 20px; margin-top: 2px; }
.summary-row small { display: block; color: #5f6878; margin-top: 4px; }
.summary-disclosure { color: #5f6878; font-size: 12px; line-height: 1.5; }
.checkout-links { display: flex; flex-wrap: wrap; gap: 8px 14px; margin: 16px 0; font-size: 13px; }
.checkout-disabled { padding: 16px; border: 1px solid #c9a34a; background: #fff8df; border-radius: 10px; }
.success-layout { grid-template-columns: 1fr; max-width: 720px; }
.success-card { margin-top: 40px; }
.success-details { border-block: 1px solid #dfe4ec; padding: 16px 0; }
.success-details div { display: grid; grid-template-columns: 150px 1fr; padding: 6px 0; }
.success-details dd { margin: 0; font-weight: 700; overflow-wrap: anywhere; }
@media (max-width: 700px) {
  .checkout-policies dl { grid-template-columns: 1fr; }
  .checkout-policies dl div { grid-template-columns: 100px 1fr; }
}

#payment-element {
  min-height: 2.5rem;
}

.checkout-top .platform-brand-text strong { font-size: 15px; }
.brand { color: var(--acid); }
button[type="submit"], .pay-btn, .btn-primary { background: var(--acid) !important; color: #fff !important; }