/*el * es selector universal o todo*/
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{

    min-height: 100vh;

    font-family: Arial, sans-serif;

    background: linear-gradient(
        135deg,
        #0F2027,
        #203A43,
        #2C5364
    );

    display: flex;

    flex-direction: column;
}

/* HEADER */

.header{

    width: 100%;

    padding: 20px;

    text-align: center;

    color: white;

    font-size: 1.5rem;

    font-weight: bold;

    background: rgba(255,255,255,0.08);

    backdrop-filter: blur(10px);

    -webkit-backdrop-filter: blur(10px);

    border-bottom: 1px solid rgba(255,255,255,0.1);

    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

/* CONTENEDOR CENTRAL */

.contenedor-login{

    flex: 1;

    display: flex;

    justify-content: center;

    align-items: center;

    padding: 20px;
}

/* TARJETA */

.tarjeta-login{

    width: 100%;

    max-width: 380px;

    padding: 35px;

    border-radius: 20px;

    background: rgba(255,255,255,0.12);

    backdrop-filter: blur(15px);

    -webkit-backdrop-filter: blur(15px);

    border: 1px solid rgba(255,255,255,0.15);

    box-shadow: 0 8px 32px rgba(0,0,0,0.35);

    color: white;
}
/* ALERTA DE ERROR */
#alerta-login{

    margin-top: 15px;

    color: #FF5252;

    font-size: 14px;

    text-align: center;
}

/* TITULO */

.subtitulo{

    text-align: center;

    margin-bottom: 25px;

    font-size: 2rem;

    font-weight: bold;

    color: white;
}

/* LABELS */

#formulario-login label{

    display: block;

    margin-bottom: 8px;

    font-size: 14px;

    color: #EAEAEA;
}

/* INPUTS */

#formulario-login input{

    width: 100%;

    padding: 12px;

    margin-bottom: 18px;

    border: none;

    border-radius: 10px;

    outline: none;

    background: rgba(255,255,255,0.18);

    color: white;

    font-size: 14px;
}

/* PLACEHOLDER */

#formulario-login input::placeholder{

    color: rgba(255,255,255,0.7);
}

/* FOCUS */

#formulario-login input:focus{

    border: 1px solid #00E676;

    box-shadow: 0 0 10px rgba(0,230,118,0.4);
}

/* BOTON */

#formulario-login button{

    width: 100%;

    padding: 12px;

    border: none;

    border-radius: 10px;

    background: #00E676;

    color: #0F2027;

    font-size: 15px;

    font-weight: bold;

    cursor: pointer;

    transition: 0.3s;
    margin-top: 15px;
}

/* HOVER */

#formulario-login button:hover{

    background: #00c853;

    transform: translateY(-2px);

    box-shadow: 0 4px 15px rgba(0,230,118,0.4);
}
/*Apartado para mostrar contraseña*/

.mostrar-password {
    display: flex!important; 
    flex-direction: row;         
    align-items: center;         
    gap: 10px;                  
    margin-top: 0px;            
    width: 100%;                 
}

.mostrar-password input[type="checkbox"] {
    width: 18px !important;     
    height: 18px !important;     
    margin: 0 !important;       
    cursor: pointer;
    flex-shrink: 0;              /* Evita que el cuadro se haga chiquito si el texto es largo */
}

.mostrar-password label {
    font-size: 14px;
    color: #EAEAEA;
    cursor: pointer;
    margin: 0 !important;        /* Evita que el label empuje al checkbox */
    line-height: 1;              
}

/* RESPONSIVE TELEFONOS */

@media(max-width: 480px){

    .header{

        font-size: 1.2rem;

        padding: 15px;
    }

    .tarjeta-login{

        padding: 25px;
    }

    .subtitulo{

        font-size: 1.6rem;
    }

    #formulario-login input{

        padding: 11px;
    }

    #formulario-login button{

        padding: 11px;
    }
}