CSS - Center elemento horizontally

by Salustiano Silva

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
<div class="login-wrapper">
    <div class="login-container">
        <form>
            <img src="img/logo.png" alt="logo" />
            <div class="form-group">
                <input type="email" class="form-control input-login" placeholder="Usuário" />
            </div>
            <div class="form-group">
                <input type="password" class="form-control input-login" placeholder="Senha" />
            </div>
            <button type="submit" class="btn btn-acessar">Acessar</button>
        </form>
        <div class="link"> <a href="#" class="col-xs-6">esqueci minha senha.</a>
 <a href="#" class="col-xs-6">seja nosso cliente.</a>

        </div>
    </div>
</div>

CSS

html, body {
    height: 100%;
    width: 100%;
    background-color: red;
}
body {
    color: red;
    text-align: center;
    text-shadow: 0 1px 3px rgba(0, 0, 0, .5);
}
/*Config da tela do login*/
 .login-wrapper {
    float: left;
    clear: both;
    width: 100%;
    display: block;
}
.login-container {
    margin: 0 auto;
    max-width:60%;
}
/*configuração do form login*/
 .btn-acessar {
    background-color: darkred;
    color: white;
    width: 75%;
}
.link {
    float: left;
    clear: both;
    width: 100%;
    padding: 10px 0;
}
.link a {
    display: inline-block;
    color: white;
    text-decoration: underline;
    font-weight: 100;
    font-size: 0.8em;
}
.input-login {
    width: 75%;
    display:block;
    margin: 0 auto;
}
form img {
    width: 75%;
    padding: 0 0 20px;
}