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

body {
  background: linear-gradient(135deg, #4203a9, #90bafc);
  color: #fff;
}

.container {
  width: 100%;
  min-height: 100vh;
}

.calculator {
  width: fit-content;
  margin-left: 10%;
  margin-top: 10%;
}

.calculator h1 {
  font-size: 4.5rem;
  font-weight: bold;
  border-left: solid #f0f05a 0.4rem;
  padding-left: 1rem;
}

.calculator h1 span {
  color: #f0f05a;
}

.input-box {
  margin: 1rem 0;
  padding: 1rem;
  border-radius: 10px;
  background: rgb(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
}

.input-box input {
  flex: 1;
  margin-right: 20px;
  padding: 14px 20px;
  border: 0;
  outline: 0;
  font-size: 1rem;
  border-radius: 5px;
  position: relative;
}

.input-box button {
  background: #ffff76;
  border: 0;
  outline: 0;
  padding: 1rem 1rem;
  border-radius: 5px;
  font-weight: 700;
  color: #333;
  cursor: pointer;
  font-size: 0.9rem;
}

.input-box input::webkit-calendar-picker-indicator {
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: auto;
  position: absolute;
  background-position: calc(100%-10px);
  background-size: 30px;
  cursor: pointer;
  height: auto;
}

#result {
  font-size: 1.5rem;
}

#result span {
  color: #ffff76;
}

@media (max-width: 600px) {
  .container {
    margin-top: 50%;
  }
  .calculator h1 {
    font-size: 2.5rem;
  }

  .input-box {
    width: fit-content;
  }

  .input-box input {
    flex: 1;
    margin-right: 1rem;
    padding: 0.8rem 1rem;
    border: 0;
    outline: 0;
    font-size: 1rem;
    border-radius: 5px;
    position: relative;
  }

  #result {
    font-size: 1.2rem;
  }
}