<div class="container">
  <form autocomplete="off">
    <div class="finder">
      <div class="finder__outer">
        <div class="finder__inner">
          <div class="finder__icon" ref="icon"></div>
          <input class="finder__input" type="text" name="q" />
        </div>
      </div>
    </div>
  </form>
</div>

html,
body {
  padding: 0;
  margin: 0;
  color: #292929;
  background-color: #eaeaea;
}
.container {
  text-align: center;
  color: #2c3e50;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

form {
  transition: all 0.5s;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}
.finder {
  border: 1px solid #fff;
  background-color: #f6f5f0;
  border-radius: 15px;
  padding: 8px;
  box-shadow: 9px 9px 16px rgba(189, 189, 189, 0.6),
    -9px -9px 16px rgba(255, 255, 255, 0.5);
}

.finder__outer {
  display: flex;
  width: 600px;
  padding: 1.5rem 2rem;
  border-radius: 10px;
  box-shadow: inset 10px 10px 15px -10px #c3c3c3,
    inset -10px -10px 15px -10px #ffffff;
}

.finder__inner {
  display: flex;
  align-items: center;
  position: relative;
  flex: 1;
}

.finder__form {
  flex: 1;
  height: calc(100% + 3rem);
}

.finder__input {
  height: calc(100% + 3rem);
  border: none;
  background-color: transparent;
  outline: none;
  font-size: 1.5rem;
  letter-spacing: 0.75px;
}

.finder__icon {
  width: 40px;
  height: 40px;
  margin-right: 1rem;
  transition: all 0.2s;
  box-shadow: inset 0 0 0 20px #292929;
  border-radius: 50%;
  position: relative;

  &:after,
  &:before {
    display: block;
    content: "";
    position: absolute;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  }

  &:after {
    width: 10px;
    height: 10px;
    background-color: #292929;
    border: 3px solid #f6f5f0;
    top: 50%;
    position: absolute;
    transform: translateY(-50%);
    left: 0px;
    right: 0;
    margin: auto;
    border-radius: 50%;

    @at-root .active & {
      border-width: 10px;
      background-color: #f6f5f0;
    }
  }

  &:before {
    width: 4px;
    height: 13px;
    background-color: #f6f5f0;
    top: 50%;
    left: 20px;
    transform: rotateZ(45deg) translate(-50%, 0);
    transform-origin: 0 0;
    border-radius: 4px;

    @at-root .active & {
      background-color: #292929;
      width: 6px;
      transform: rotateZ(45deg) translate(-50%, 25px);
    }
  }

  @at-root .processing & {
    transform-origin: 50%;
    animation: spinner 0.3s linear infinite;
    animation-delay: 0.5s;
  }

  @at-root .active & {
    transform: translateY(-5px);
  }
}

@keyframes spinner {
  0% {
    transform: rotateZ(45deg);
  }
  100% {
    transform: rotateZ(405deg);
  }
}

const input = document.querySelector(".finder__input");
const finder = document.querySelector(".finder");
const form = document.querySelector("form");

input.addEventListener("focus", () => {
  finder.classList.add("active");
});

input.addEventListener("blur", () => {
  if (input.value.length === 0) {
    finder.classList.remove("active");
  }
});

form.addEventListener("submit", (ev) => {
  ev.preventDefault();
  finder.classList.add("processing");
  finder.classList.remove("active");
  input.disabled = true;
  setTimeout(() => {
    finder.classList.remove("processing");
    input.disabled = false;
    if (input.value.length > 0) {
      finder.classList.add("active");
    }
  }, 1000);
});