:root{--azul-escuro:#171c36;--azul-dark:#070a1d;--azul-claro:#3797bf;--muted:#565865}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:var(--azul-escuro);font-family:"Nunito Sans","Segoe UI",Arial,sans-serif;color:var(--azul-dark);padding:24px 16px}
.caixa{background:#fff;border-radius:12px;padding:34px 34px 28px;width:min(400px,100%);text-align:center;
  border-top:6px solid var(--azul-claro)}
.logo{display:block;height:64px;width:auto;margin:0 auto 22px}
h1{margin:0 0 4px;font-size:24px;font-weight:700}
p{color:var(--muted);font-size:14px;margin:6px 0 24px}
a.google{display:inline-flex;align-items:center;gap:10px;padding:11px 22px;border-radius:8px;text-decoration:none;
  color:#fff;font-weight:700;font-size:15px;background:var(--azul-escuro)}
a.google svg{background:#fff;border-radius:4px;padding:2px;width:22px;height:22px}
a.google:hover{background:var(--azul-dark)}
a.google:focus-visible{outline:2px solid var(--azul-escuro);outline-offset:2px}
.erro{color:#9C0006;background:#FFC7CE;border-radius:8px;padding:10px 12px;font-size:13.5px;text-align:left}
small{display:block;margin-top:22px;color:var(--muted);font-size:12.5px;line-height:1.5}