:root {
  --brand: #1b65f1;
  --bg: #0b1021;
  --surface: #0f172a;
  --muted: #cbd5e1;
  --text: #e2e8f0;
  --radius: 14px;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at 20% 20%, #122347, #0b1021);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.shell {
  max-width: 780px;
  width: 100%;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.brand__logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  object-fit: contain;
}

.brand__kicker {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 2px 0 0;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
}

.card__body {
  display: grid;
  gap: 16px;
}

.product .eyebrow,
.pix .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  color: var(--muted);
  margin: 0 0 4px;
}

.price {
  margin: 6px 0 0;
  font-size: 20px;
  color: var(--text);
}

.form {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

label { color: var(--muted); }

input {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  color: var(--text);
}

select {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  color: var(--text);
}

option {
  color: #0f172a;
  background: #ffffff;
}

option:disabled {
  color: #64748b;
}

.payment-methods {
  display: flex;
  gap: 10px;
}

.card-fields {
  border: 1px dashed rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
}

.cta {
  background: var(--brand);
  color: #fff;
  border: none;
  padding: 14px;
  border-radius: 12px;
  font-size: 16px;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.cta:hover { transform: translateY(-1px); box-shadow: 0 10px 30px rgba(0,0,0,0.25); }
.cta:disabled { opacity: 0.7; cursor: not-allowed; transform: none; box-shadow: none; }

.feedback {
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
}

.feedback--error {
  background: rgba(239, 68, 68, 0.14);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fecaca;
}

.feedback--info {
  background: rgba(59, 130, 246, 0.14);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #bfdbfe;
}

.invalid {
  border-color: rgba(239, 68, 68, 0.8) !important;
  box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.25);
}

.pix {
  border: 1px dashed rgba(255,255,255,0.18);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}

.pix img {
  width: 200px;
  height: 200px;
  object-fit: contain;
  background: #fff;
  border-radius: 12px;
  margin: 8px auto;
}

#pixQr:not([src]) {
  display: none;
}

.pix__status {
  color: var(--muted);
  margin: 0 0 10px;
  font-size: 14px;
}

.copy {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.copy button {
  background: var(--brand);
  color: #fff;
  border: none;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
}

.hidden { display: none; }

@media (max-width: 640px) {
  body { padding: 12px; }
  .card { padding: 16px; }
}