/* Página de entrada sem login (entrar.html): um cartão ao centro com o botão do Google */
.login-gate{
  max-width:520px;margin:56px auto 72px;padding:36px 28px;text-align:center;
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
}
.login-gate h1{font-size:1.5rem;line-height:1.3;margin:0 0 16px;color:var(--text)}
.login-gate p{color:var(--text);line-height:1.6;margin:0 0 10px}
.login-gate .login-gate-muted{color:var(--muted);font-size:.9rem;margin-bottom:26px}
.login-gate .error-box{margin:0 0 18px;text-align:left}
.login-gate-btn{display:inline-flex;font-size:1rem;padding:12px 24px}

@media (max-width:600px){
  .login-gate{margin:28px 16px 44px;padding:28px 20px}
  .login-gate h1{font-size:1.25rem}
}