<h3>Kiribati</h3>

<div class="flag kiribati">
  <img src="https://imgur.com/4dKGZC1.png" alt="" class="kiribati__sun" />

  <img src="https://imgur.com/UevumJS.png" height="28" alt="" class="kiribati__bird" />
  <div class="kiribati__blue_bottom">
    <img src="https://imgur.com/TTsCpds.png" alt="" class="kiribati__wave" />
  </div>
</div>

* {
  box-sizing: border-box;
  margin: 0;
}

body {
  width: 100%;
  height: 100vh;
  background-color: rgb(221, 239, 255);
  display: grid;
  place-items: center;
  font-family: cursive;
  font-weight: bold;
}

h3 {
  position: absolute;
  text-align: center;
  top: 20px;
}

/* Main Style Stars from here  */
.flag {
  position: relative;
  width: 300px;
  height: 200px;
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.kiribati {
  background: #c81010;
}

.kiribati__blue_bottom {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 92px;
  background: #183070;
  z-index: 1;
}

.kiribati__wave {
  width: 100%;
  position: absolute;
  margin-top: -10px;
  filter: drop-shadow(0 35px white) drop-shadow(0 70px white);
}

.kiribati__sun {
  position: absolute;
  inset: 0;
  margin: auto;
  height: 82px;
  z-index: 0;
}

.kiribati__bird {
  position: absolute;
  inset: 0;
  margin: 20px auto;
}