:root {
  --azul: #3d5afe;
  --azul-escuro: #2a3eb1;
  --texto: #1e2233;
  --texto-suave: #6b7280;
  --fundo-1: #eef1ff;
  --fundo-2: #fdf2f8;
  --erro: #e11d48;
  --borda: #d9dce6;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  color: var(--texto);
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 16px;
  background: linear-gradient(135deg, var(--fundo-1), var(--fundo-2));
}

.wrapper {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: white;
  padding: 32px 28px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(61, 90, 254, 0.12);
}

.resultado-card {
  animation: aparecer 0.25s ease;
}

@keyframes aparecer {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--texto-suave);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

input, button {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  border-radius: 10px;
  border: 1.5px solid var(--borda);
}

input { margin-bottom: 14px; transition: border-color 0.15s ease; }

input:focus, button:focus-visible {
  outline: none;
  border-color: var(--azul);
  box-shadow: 0 0 0 4px rgba(61, 90, 254, 0.15);
}

input[aria-invalid="true"] { border-color: var(--erro); }

button {
  background: var(--azul);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.15s ease, transform 0.1s ease;
}

button:hover:not(:disabled) { background: var(--azul-escuro); }
button:active:not(:disabled) { transform: scale(0.98); }
button:disabled { opacity: 0.6; cursor: not-allowed; }

.resultado { font-size: 14px; }
.resultado dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 14px;
  row-gap: 10px;
}
.resultado dt {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--texto-suave);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-top: 2px;
}
.resultado dd { margin: 0; font-weight: 500; }
.erro { color: var(--erro); font-weight: 500; margin: 0; }

.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid #dbe0ff;
  border-top-color: var(--azul);
  border-radius: 50%;
  animation: girar 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

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

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
  .resultado-card { animation: none; }
}

@media (max-width: 400px) {
  .card { padding: 22px 20px; }
}