:root {
  --fundo: #0b0b0d; --cartao: #141418; --borda: #26262c; --texto: #f2f2f4; --sutil: #9a9aa3;
  --marca: #d7ff3a; --marca-texto: #0b0b0d; --erro: #ff6b6b; --ok: #4ade80;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; background: var(--fundo); color: var(--texto);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex; justify-content: center; padding: 24px 16px;
}
.caixa { width: 100%; max-width: 440px; background: var(--cartao); border: 1px solid var(--borda); border-radius: 14px; padding: 24px; }
.topo { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.marca { font-size: 20px; font-weight: 700; letter-spacing: -0.02em; }
.marca b { color: var(--marca); }
.seguro { font-size: 12px; color: var(--sutil); }
h2 { font-size: 16px; margin: 20px 0 12px; }
.sutil { color: var(--sutil); margin: 0; }
.valor { font-size: 28px; font-weight: 700; margin: 4px 0 0; }
.valor .sutil { font-size: 14px; font-weight: 400; }
label { display: block; font-size: 13px; color: var(--sutil); margin-bottom: 12px; }
input {
  display: block; width: 100%; margin-top: 4px; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--borda); background: var(--fundo); color: var(--texto); font-size: 15px;
}
input:focus { outline: 2px solid var(--marca); outline-offset: 1px; }
.lado { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.botao {
  display: block; width: 100%; text-align: center; text-decoration: none; margin-top: 8px;
  padding: 12px; border: 0; border-radius: 8px; background: var(--marca); color: var(--marca-texto);
  font-weight: 600; font-size: 15px; cursor: pointer;
}
.botao:disabled { opacity: 0.5; cursor: wait; }
.botao.secundario { background: transparent; color: var(--texto); border: 1px solid var(--borda); }
.abas { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 4px; border: 1px solid var(--borda); border-radius: 10px; margin-bottom: 16px; }
.aba { padding: 8px; border: 0; border-radius: 7px; background: transparent; color: var(--sutil); font-weight: 600; cursor: pointer; }
.aba.ativa { background: var(--borda); color: var(--texto); }
.dica { font-size: 12px; color: var(--sutil); margin: 8px 0 0; }
.alerta { margin: 12px 0; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--erro); color: var(--erro); font-size: 14px; }
#pix-qr { display: block; width: 220px; height: 220px; margin: 0 auto 12px; background: #fff; border-radius: 8px; }
.oculto { display: none !important; }