:root {
  --color-bg: #FFFFFF;
  --color-card: #FFFFFF;
  --color-text: #111111;
  --color-text-secondary: #667085;
  --color-border: #D0D5DD;
  --color-bg-secondary: #F8F9FA;
  --color-button-bg: #000000;
  --color-button-text: #FFFFFF;
  --color-accent-bg: #0D6EFD;
  --color-danger: #B42318;
  --color-danger-bg: #FEF3F2;
  --color-focus: #111111;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --radius-card: 12px;
  --radius-input: 8px;
  --page-bg: #F2F3F5;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--page-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  padding: 40px 16px;
}

.wrapper {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
  padding: 30px;
}

@media (max-width: 480px) {
  body { padding: 16px; }
  .card { padding: 22px; }
}

.hidden { display: none !important; }

.screen-title {
  margin: 0 0 8px;
  font-size: 30px;
  font-weight: 700;
  text-align: center;
  line-height: 1.25;
}

/* O título recebe foco por script ao trocar de tela (leitor de tela anuncia
   a mudança), mas não é um elemento interativo — sem contorno visual. */
.screen-title:focus {
  outline: none;
}

.screen-subtitle {
  margin: 0 0 32px;
  font-size: 15px;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.5;
}

@media (max-width: 480px) {
  .screen-title { font-size: 26px; }
  .screen-subtitle { margin-bottom: 24px; }
}

form { margin: 0; }

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.field input[type="text"],
.field input[type="email"],
.field textarea {
  width: 100%;
  font-size: 16px;
  font-family: inherit;
  color: var(--color-text);
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  padding: 0 14px;
  height: 50px;
}

.field textarea {
  height: 140px;
  padding: 12px 14px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.field-hint {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.field-error {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-danger);
}

.field.has-error input,
.field.has-error textarea {
  border-color: var(--color-danger);
}

.btn {
  display: block;
  width: 100%;
  min-height: 50px;
  padding: 12px 20px;
  border-radius: var(--radius-input);
  border: none;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
  white-space: normal;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: var(--color-button-bg);
  color: var(--color-button-text);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-accent {
  background: var(--color-accent-bg);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-link {
  background: transparent;
  border: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 14px;
  text-decoration: underline;
  cursor: pointer;
  padding: 8px 0;
}

.form-block { margin-bottom: 24px; }
.form-block:last-child { margin-bottom: 0; }
.form-title-gap { margin-top: 32px; }

.status-message {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: 16px;
  min-height: 20px;
}

.status-message[role="alert"] {
  color: var(--color-danger);
}

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-text);
  animation: spin 0.7s linear infinite;
  flex: none;
}

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

/* Tela 1 — não encontrado */
.empty-state {
  text-align: center;
}
.empty-state p { color: var(--color-text-secondary); margin: 0 0 8px; }
.empty-state p:first-child { color: var(--color-text); font-weight: 600; }

/* Tela 2 — lista de compras */
.purchase-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  border-top: 1px solid var(--color-border);
}

.purchase-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.purchase-item .product-name {
  font-weight: 700;
  font-size: 16px;
}

.purchase-item .purchase-meta {
  font-size: 13px;
  color: var(--color-text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.purchase-item .purchase-amount {
  font-size: 15px;
  font-weight: 600;
  margin-top: 4px;
}

.status-badge {
  display: inline-block;
  align-self: flex-start;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 10px;
  border-radius: 999px;
  margin-top: 2px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.summary-row .label {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.summary-row .value {
  font-size: 20px;
  font-weight: 700;
}

.masked-email {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 50;
}

.modal-box {
  background: #FFFFFF;
  border-radius: 12px;
  max-width: 520px;
  width: 100%;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  padding: 28px;
}

@media (max-width: 480px) {
  .modal-box { width: calc(100% - 32px); padding: 22px; }
}

.modal-box h2 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 700;
}

.modal-box p { margin: 0 0 16px; line-height: 1.5; }

.modal-purchase-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  border-top: 1px solid var(--color-border);
}
.modal-purchase-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

/* Tela 3 — confirmação */
.confirmation-check {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.protocol-box {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  padding: 16px;
  text-align: center;
  margin-top: 24px;
}
.protocol-box .protocol-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}
.protocol-box .protocol-value {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}