:root {
  --fundo: #0e1116;
  --cartao: #181d25;
  --borda: #2a3140;
  --texto: #e8ecf2;
  --suave: #9aa4b2;
  --destaque: #4fb3ff;
  --ok: #3ccf8e;
  --alerta: #ffb84f;
  --erro: #ff6b6b;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--fundo);
  color: var(--texto);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
h1, h2, h3 { margin: 0 0 .4em; line-height: 1.15; }
.suave { color: var(--suave); }
.erro { color: var(--erro); min-height: 1.4em; }
.centro {
  min-height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 24px;
}
.cartao {
  background: var(--cartao); border: 1px solid var(--borda); border-radius: 14px; padding: 16px;
}
button, .botao {
  font: inherit; color: var(--texto); background: #232a36; border: 1px solid var(--borda);
  border-radius: 12px; padding: 12px 16px; cursor: pointer;
}
button:active { transform: scale(.98); }
button.primario { background: var(--destaque); border-color: var(--destaque); color: #04121f; font-weight: 600; }
button.perigo { border-color: var(--erro); color: var(--erro); background: transparent; }
button:disabled { opacity: .4; }
input[type=text], input[type=password], input[inputmode] {
  font: inherit; color: var(--texto); background: #0b0e13; border: 1px solid var(--borda);
  border-radius: 10px; padding: 12px; width: 100%;
}
.pin { font-size: 2rem; letter-spacing: .5em; text-align: center; max-width: 280px; }
label.linha { display: flex; gap: 10px; align-items: center; margin: 10px 0; }
.selo-teste {
  display: inline-block; background: var(--alerta); color: #1d1300; font-weight: 700;
  border-radius: 8px; padding: 2px 10px;
}