@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,200;0,300;0,400;0,500;0,600;0,700;0,900;1,100;1,800&display=swap');

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

body {
    min-height: 200vh;
}

section {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: #333;
}

section .sec {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 10;
}

section .sec.sec1 {
    background: #b0ff54;
    clip-path: circle(300px at 0 0);
}

section .sec.sec2 {
    background: #03a9f4;
    clip-path: circle(200px at 100% 100%);
}

section h3 {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    text-align: center;
    color: #fff;
    font-size: 18em;
}

section .sec.sec1 h3 {
    color: transparent;
    -webkit-text-stroke: 5px #333;
}

section .sec.sec2 h3 {
    color: #333;
    -webkit-text-stroke: 5px #fff;
}

/* https://www.youtube.com/watch?v=3rXD3jmpq9g */