/* ---------------------------------------------------
   Tokens
--------------------------------------------------- */
:root {
  --color-bg: #E9ECF1;
  --color-surface: #FFFFFF;
  --color-ink: #12151C;
  --color-ink-soft: #5B6270;
  --color-line: #D7DBE3;
  --color-accent: #1B5E4F;
  --color-accent-soft: #E4EFEC;
  --color-warn: #A64B36;
  --color-warn-soft: #F6E9E5;

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
}



body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------
   Page shell
--------------------------------------------------- */
.page {
  max-width: 880px;
  margin: 0 auto;
  padding: var(--space-7) var(--space-4) var(--space-7);
}

.page__header {
  margin-bottom: var(--space-6);
  max-width: 100%;
}

.page__eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
}

.page__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.page__subtitle {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
  line-height: 1.55;
}

/* ---------------------------------------------------
   Total bar
--------------------------------------------------- */
.total-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-5);
}

.total-bar__label {
  font-size: 0.9375rem;
  font-weight: 500;
}

.total-bar__field {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.total-bar__prefix {
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
}

.total-bar__field input {
  width: 140px;
  text-align: right;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--color-ink);
  padding: 0;
}

.total-bar__field input:focus {
  outline: none;
}

/* ---------------------------------------------------
   Two card layout
--------------------------------------------------- */
.cards-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: var(--space-5);
}

.cards-row__joint {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-top: var(--space-7);
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.card-panel {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: var(--space-5);
  margin: 0;
  min-width: 0;
}

.card-panel__legend {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
}

.card-panel__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: var(--color-surface);
  font-size: 0.75rem;
  font-weight: 600;
}

/* ---------------------------------------------------
   Fields
--------------------------------------------------- */
.field {
  margin-bottom: var(--space-4);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.field--cvv {
  grid-template-columns: none;
}

label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-ink-soft);
}

input[type="text"],
select {
  width: 90%;
  min-height: 44px;
  padding: 10px var(--space-3);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  appearance: none;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235B6270' stroke-width='1.5' fill='none' fill-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-6);
}

input[type="text"]::placeholder {
  color: #A6ACB8;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.input-prefix {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  overflow: hidden;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.input-prefix:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.input-prefix__symbol {
  padding: 10px 0 10px var(--space-3);
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
}

.input-prefix input {
  border: none;
  box-shadow: none;
  padding-left: var(--space-1);
}

.input-prefix input:focus {
  box-shadow: none;
}

/* ---------------------------------------------------
   Balance bar
--------------------------------------------------- */
.balance-bar {
  margin-top: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  padding: var(--space-4) var(--space-5);
}

.balance-bar__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  padding: var(--space-1) 0;
}

.balance-bar__row span {
  color: var(--color-ink-soft);
}

.balance-bar__row strong {
  font-family: var(--font-display);
  font-size: 1rem;
}

.balance-bar--ok .balance-bar__row strong {
  color: var(--color-accent);
}

.balance-bar--off #balance-remaining {
  color: var(--color-warn);
}

/* ---------------------------------------------------
   Submit
--------------------------------------------------- */
.submit-button {
  width: 100%;
  margin-top: var(--space-5);
  padding: 14px var(--space-4);
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-surface);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

.submit-button:hover {
  background: #164C40;
}

.submit-button:active {
  transform: translateY(1px);
}

.submit-button:focus-visible {
  outline: 3px solid var(--color-accent-soft);
  outline-offset: 2px;
}

/* ---------------------------------------------------
   Responsive — tablet e celular grande (≤720px)
--------------------------------------------------- */
@media (max-width: 720px) {
  .page {
    padding: var(--space-5) var(--space-3) var(--space-6);
  }

  .page__header {
    margin-bottom: var(--space-5);
  }

  .page__title {
    font-size: 1.5rem;
  }

  .page__subtitle {
    font-size: 0.875rem;
  }

  .cards-row {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .cards-row__joint {
    margin: 0 auto;
    transform: rotate(90deg);
  }

  .card-panel {
    padding: var(--space-4);
  }

  .total-bar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    padding: var(--space-4);
  }

  .total-bar__field {
    justify-content: space-between;
  }

  .total-bar__field input {
    width: 100%;
    text-align: right;
  }

  .balance-bar {
    padding: var(--space-3) var(--space-4);
  }
}

/* ---------------------------------------------------
   Responsive — celular pequeno (≤480px)
--------------------------------------------------- */
@media (max-width: 480px) {
  .page {
    padding: var(--space-4) var(--space-3) var(--space-6);
  }

  .page__eyebrow {
    font-size: 0.75rem;
  }

  .page__title {
    font-size: 1.3125rem;
  }

  .card-panel__legend {
    font-size: 1rem;
  }

  /* validade/CVV e parcelas/valor empilham em vez de dividir a coluna,
     evitando campos apertados demais em telas estreitas */
  .field-row {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .field {
    margin-bottom: var(--space-3);
  }

  .input-prefix__symbol {
    font-size: 1rem;
  }

  .balance-bar__row {
    font-size: 0.8125rem;
  }

  .balance-bar__row strong {
    font-size: 0.9375rem;
  }

  .submit-button {
    padding: 14px var(--space-3);
    font-size: 0.9375rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .submit-button {
    transition: none;
  }
}