CSS

body, input, button, span, span::before, ul {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.form {
  font-family: Arial, sans-serif;
  height: 90vh;
  display: flex;
}

form {
  display: flex;
  margin: auto;
  align-items: flex-start;
}

.input {
  position: relative;
}

ul {
  height: 200px;
  position: absolute;
  bottom: -220px;
  left: 0;
  width: 50vw;
  display: none;
}

ul li {
  list-style-type: none;
  font-size: 16px;
  border-radius: 5px;
  padding: 10px;
  box-sizing: border-box;
  cursor: pointer;
}

ul li:hover {
  background-color: #fceba9;
}

input[type="text"] {
  width: 50vw;
  height: 46px;
  border: 2px solid #ffdb4d;
  outline: none;
  font-size: 20px;
  padding-left: 10px;
}

button {
  overflow: hidden;
  display: block;
  text-align: center;
  cursor: pointer;
  border: 0;
  font-size: 20px;
  outline: none;
  background: 0 0;
}

span {
  width: 95px;
  height: 46px;
  margin: 0 13px 0 0;
  position: relative;
  display: block;
  border: 0 solid #ffdb4d;
  background-color: #ffdb4d;
  padding: 12px;
}

span::before {
  border-width: 31px 0 28px 14px;
  right: -12px;
  top: -8px;
  position: absolute;
  width: 0;
  height: 0;
  content: '';
  border-style: solid;
  border-color: rgba(255, 219, 76, 0);
  border-left-color: inherit;
}

.logo {
  width: 60px;
  height: 27px;
  background-image: url(https://pictures.s3.yandex.net/ya_grey.svg);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  position: absolute;
  bottom: 20px;
  left: 50%;
  margin-left: -30px;
  cursor: pointer;
  transition: background .25s ease;
}

.logo:hover {

}