body {
    margin: 0;
    padding: 0;
    background: #f0f0f0;
    font-family: Arial, sans-serif;
}

.login-container {
    position: relative;
    width: 90%; /* ocupa até 90% da tela */
    max-width: 826px; /* largura máxima = largura da imagem original */
    aspect-ratio: 826 / 561; /* mantém proporção */
    margin: 20px auto;
    background: url('../images/loginconvestlv1.png') no-repeat center top;
    background-size: contain;
}
.campo {
    position: absolute;
    width: 27%; /* proporcional à largura */
    height: 6.3%; /* proporcional à altura */
    font-size: 1.2vw;
    padding: 0.5%;
    /*  border: 1px solid #888;*/
    border-radius: 10px;
    height: 4.0%;
    width: 20.5%;
    border: none;
    padding-left: 8px;
    left: 3.8%;
    border: none; /* sem borda inicialmente */
    background: white; /* fundo branco sempre */
    outline: none; /* remove a borda azul padrão */
}
.empresa {
    top: 49.7%;
}

.usuario {
    top: 60.2%;
}

.senha {
    top: 70.5%;
}
.botao-login {
    position: absolute;
    top: 78%;
    left: 3.5%;
    width: 22.7%;
    height: 7%;
    font-size: 1.5vw;
    background-color: transparent; /* fundo transparente */
    color: transparent;
    border: none;
    cursor: pointer;
    border-radius: 10px;
}

    .botao-login:hover {
        background-color: rgba(0,0,139,0.2); /* leve fundo azul ao passar o mouse */
    }
.link-cadastro {
    position: absolute;
    top: 71.5%;
    left: 39.1%;
    width: 20.5%;
    height: 8.5%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2vw;
    font-weight: bold;
    color: transparent; /*darkblue;*/
    background-color: transparent; /* gold;*/
    border: none; /*1px solid darkblue;*/
    border-radius: 4px;
    text-decoration: none;
    text-align: center;
    padding: 0.5%;
    border-radius: 20px;
}
    .link-cadastro:hover {
        background:  #ffd700;
        color: darkblue;
    }
.link-cconvest {
    position: absolute;
    top: 71%;
    left: 25%;
    width: 30%;
    height: 8%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2vw;
    font-weight: bold;
    color: darkblue; /*transparent;*/
    background-color: transparent; /* gold;*/
    border: none; /*1px solid darkblue;*/
    border-radius: 4px;
    text-decoration: none;
    text-align: center;
    padding: 0.5%;
}
.link-transparente {
    color: transparent;  deixa o texto invisível 
    text-decoration: none;  remove sublinhado 
    border: none;  remove borda 
    background: transparent;  garante fundo transparente 
}