:root {
  color-scheme: dark;
  --bg: #0a100b;
  --card: #121c14;
  --card-2: #16221a;
  --line: rgba(163, 230, 175, .14);
  --line-strong: rgba(163, 230, 175, .28);
  --green: #3ddc63;
  --green-strong: #2bc954;
  --green-soft: rgba(61, 220, 99, .12);
  --ink: #eef7ef;
  --muted: #9db3a2;
  --font-display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(ellipse 56rem 32rem at 80% -10%, rgba(61, 220, 99, .12), transparent 70%),
    radial-gradient(ellipse 40rem 28rem at -8% 50%, rgba(61, 220, 99, .06), transparent 70%),
    var(--bg);
}

a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); }

.checkout-shell { width: min(720px, calc(100% - 40px)); margin-inline: auto; padding-bottom: 70px; }

/* ---------- Topo ---------- */
.checkout-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 84px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: #06130a;
  background: linear-gradient(145deg, var(--green), #7cf29a);
  box-shadow: 0 6px 22px rgba(61, 220, 99, .3);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: .84rem;
  font-weight: 600;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.back-link:hover, .back-link:focus-visible { color: var(--ink); border-color: var(--line-strong); background: rgba(163, 230, 175, .07); }

:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

/* ---------- Título ---------- */
.checkout-intro { margin: 26px 0 30px; }

h1 { margin: 0; font-size: clamp(1.85rem, 4.6vw, 2.5rem); letter-spacing: -.03em; font-weight: 700; }

.checkout-intro p { margin: 10px 0 0; color: var(--muted); font-size: .95rem; }

/* ---------- Resumo do produto ---------- */
.product-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  border: 1px solid rgba(61, 220, 99, .45);
  border-radius: 18px;
  background:
    radial-gradient(ellipse 22rem 12rem at 88% -30%, rgba(61, 220, 99, .14), transparent 70%),
    var(--card-2);
}

.product-icon {
  flex: 0 0 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: var(--green);
  background: var(--green-soft);
  border: 1px solid rgba(61, 220, 99, .25);
}

.product-info { flex: 1 1 auto; min-width: 0; }
.product-info h2 { margin: 0 0 4px; font-size: 1.05rem; }
.product-info p { margin: 0; color: var(--muted); font-size: .85rem; }

.product-price {
  flex: 0 0 auto;
  align-self: center;
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  letter-spacing: -.03em;
  white-space: nowrap;
}

.product-price small { color: var(--muted); font-size: .5em; font-weight: 500; letter-spacing: 0; }

/* ---------- Formulário ---------- */
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.field label { display: block; margin-bottom: 8px; font-size: .84rem; font-weight: 600; }

.field input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: var(--card);
  font: inherit;
  font-size: .93rem;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.field input::placeholder { color: #6d8474; }

.field input:hover { border-color: var(--line-strong); }

.field input:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(61, 220, 99, .16);
}

.field input[aria-invalid="true"] { border-color: #f0736b; }

.field input[aria-invalid="true"]:focus { box-shadow: 0 0 0 3px rgba(240, 115, 107, .18); }

.field-error {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin: 8px 0 0;
  color: #f0938c;
  font-size: .8rem;
  line-height: 1.45;
}

.field-error::before {
  content: "!";
  flex: 0 0 15px;
  height: 15px;
  margin-top: 1px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #2a0f0d;
  background: #f0938c;
  font-size: .68rem;
  font-weight: 800;
}

/* ---------- Aviso ---------- */
.notice {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin-top: 22px;
  padding: 15px 17px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(163, 230, 175, .05);
  color: var(--muted);
  font-size: .84rem;
  line-height: 1.55;
}

.notice svg { flex: 0 0 auto; margin-top: 1px; color: var(--green); }

/* ---------- Pagamento ---------- */
.payment-box {
  margin-top: 30px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  text-align: center;
}

.payment-title {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  color: var(--ink);
  font-size: .89rem;
  font-weight: 600;
}

.payment-title svg { color: var(--green); }

.pay-button {
  display: block;
  width: 100%;
  padding: 18px 24px;
  border: 1px solid transparent;
  border-radius: 14px;
  color: #06130a;
  background: linear-gradient(140deg, #63e884, var(--green-strong));
  font: inherit;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: .04em;
  cursor: pointer;
}

.pay-button span { display: block; margin-top: 4px; font-family: var(--font-body); font-size: .82rem; font-weight: 500; letter-spacing: 0; opacity: .8; }

.pay-button:disabled {
  color: #7d907f;
  background: #1b271e;
  border-color: var(--line);
  cursor: not-allowed;
}

.pay-status {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.5;
}

.pix-result {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card-2);
}

.pix-qr {
  display: block;
  width: 190px;
  max-width: 100%;
  margin: 0 auto;
  border-radius: 10px;
  background: #fff;
  padding: 8px;
}

.pix-copy-label {
  margin: 16px 0 8px;
  color: var(--muted);
  font-size: .82rem;
}

.pix-copy-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
}

.pix-code {
  flex: 1 1 auto;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  color: var(--ink);
  font-size: .78rem;
  text-align: left;
  overflow-x: auto;
  white-space: nowrap;
}

.pix-copy-button {
  flex: 0 0 auto;
  padding: 10px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.pix-copy-button:hover, .pix-copy-button:focus-visible {
  color: var(--green);
  border-color: var(--green);
  background: var(--green-soft);
}

.badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .8rem;
}

.badges span { display: inline-flex; align-items: center; gap: 7px; }
.badges svg { color: var(--green); }

/* ---------- Rodapé ---------- */
.checkout-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .78rem;
}

/* ---------- Responsivo ---------- */
@media (max-width: 640px) {
  .field-grid { grid-template-columns: 1fr; }
  .product-card { flex-wrap: wrap; }
  .product-price { width: 100%; }
  .checkout-footer { flex-direction: column; }
}

@media (max-width: 460px) {
  .checkout-shell { width: min(100% - 24px, 720px); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}