:root {
    --primary: #53585b;
    --dark: #eaeaea;
    --shadow: #f8f9fa;
    --border: #d1d1d1de;
    --red: #ff0000;
    --yellow: #F3DE2C;
    --green: #119822;
}

*{
    padding: 0;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    box-sizing: border-box;
}

.cabecera_principal{
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    box-shadow: 0 1px 5px var(--shadow);
}
/*Pantalla*/
.login{
    width: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 1.5em;
    height: 100vh;
    background-image: url('../imagenes/background.jpg');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}
.formulario{
    width: 350px;
    border-radius: 3px;
    -webkit-backdrop-filter: blur(50px);
    backdrop-filter: blur(10px);
    background: rgba(0, 0, 0, .2);
    padding: 15px;
}
/**/
.form_input{
    width: 100%;
    position: relative;
}

.placeholder {
    position: absolute;
    opacity: 0.6;
    font-size: .8em;
    pointer-events: none;
    color: #D1C8E1;
    transition: all .22s;
    top: 50%;
    transform: translateY(-50%);
    display: block;
}

.input_form{
    width: 100%;
    padding: .3em;
    background: transparent;
    margin: 15px 0;
    border: none;
    border-bottom: .5px solid white;
    color: #ffffff;
    font-size: .9em;
}




.input_form:focus{
    outline: 0;
}

.input_form:focus + .placeholder,
.input_form:hover + .placeholder,
.input_form:valid + .placeholder{
    top: 0;
    font-size: .8em;
    transform: translateY(0);
    left: 0;
    color: var(#D1C8E1);
    opacity: 1;
}
.cover{
     width: 100%;
  position: absolute;
  height: 4px;
  top: 1.25rem;
}
.boton_regitrar{
    width: 100%;
    background: white;
    border: none;
    border-radius: 5px;
    padding: 5px;
    cursor: pointer;
    color: black;
}

/**/
.volver{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.volver>h3{
    color: white;
    font-weight: 100;
}
.volver>a{
    background: #4a4aee;
    color: white;
    padding: 10px 25px;
    text-decoration: none;
    border-radius: 15px;
}
.volver>a:focus{
    outline: none;
}
/**/
.alert{
    margin-top: 10px;
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    font-size: .8em;
}
.alert-danger{
    background: #ff6262;
    color: #780000;
}
.alert-success{
    background: #49ff70;
    color: #002a12;
}