4 points rounded star shape

Question

I am trying to get this star as pixel perfect as possible in CSS, here's what I tried so far, but it's a 5 angled star, and I want to have it only 4 points also how can I make the corners more rounded?

#star-five {
   margin: 50px 0;
   position: relative;
   display: block;
   color: red;
   width: 0px;
   height: 0px;
   border-right:  100px solid transparent;
   border-bottom: 70px  solid red;
   border-left:   100px solid transparent;
   -moz-transform:    rotate(35deg);
   -webkit-transform: rotate(35deg);
   -ms-transform:     rotate(35deg);
   -o-transform:      rotate(35deg);
}
#star-five:before {
   border-bottom: 80px solid red;
   border-left: 30px solid transparent;
   border-right: 30px solid transparent;
   position: absolute;
   height: 0;
   width: 0;
   top: -45px;
   left: -65px;
   display: block;
   content: '';
   -webkit-transform: rotate(-35deg);
   -moz-transform:    rotate(-35deg);
   -ms-transform:     rotate(-35deg);
   -o-transform:      rotate(-35deg);

}
#star-five:after {
   position: absolute;
   display: block;
   color: red;
   top: 3px;
   left: -105px;
   width: 0px;
   height: 0px;
   border-right: 100px solid transparent;
   border-bottom: 70px solid red;
   border-left: 100px solid transparent;
   -webkit-transform: rotate(-70deg);
   -moz-transform:    rotate(-70deg);
   -ms-transform:     rotate(-70deg);
   -o-transform:      rotate(-70deg);
   content: '';
}

<div id="star-five"></div>

Answer 1

Maybe you could use a gradient on the Black Four Pointed Star Unicode char:

✦

It has some compatibility issues (mostly caused by text-fill-color) but depending on your requirements it could get the job done.

.four-point-star::after,
.four-point-star::before {
    position: absolute;
    top: 0;
    left: 0;
    content: "\2726";
    font-size: 12rem;
}

.four-point-star::after { /* The foreground star */
    background: linear-gradient(135deg, rgba(255,191,183,1) 20%, rgba(243,44,117,1) 70%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.four-point-star::before { /* The star shadow */
    color: transparent;
    text-shadow: 2px 3px 10px rgba(242, 96, 85, 1);
}

/* Demo styling */
body {
    background: #fbd629;
    padding: 0 2rem;
}

.four-point-star {
    position: relative;
}

<span class="four-point-star"></span>