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

:root {
  font-size: 62.5%;
}

body {
  font-family: 'Roboto Mono', sans-serif;
  background-color: #09090a;
  color: white;

  font-size: 1.6rem;

  height: 100vh;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 4.8rem 12rem 4.8rem;

  position: fixed;
  width: 100%;
  background-color: #09090a;
}

button {
  font-family: 'Inter', sans-serif;
  color: #fff;
  background-color: transparent;

  border: 1px solid #8b5cf6;
  border-radius: 0.8rem;
  line-height: 125%;

  display: flex;
  gap: 1.2rem;
  align-items: center;

  padding: 1.6rem 2.4rem;

  cursor: pointer;

  transition: background 0.3s;
}

button:hover {
  background: #1c1c1f;
}

#form-habits {
  display: flex;

  padding: 18rem 12rem 4.8rem;
  width: fit-content;
}

.habits {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;

  margin-top: 6.5rem;
}

.habit {
  height: 6.4rem;
  font-size: 3.2rem;

  display: grid;
  place-content: center;
}

.days {
  display: flex;
  gap: 4.8rem;
  margin-left: 3.2rem;
}

.day {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;

  text-align: center;
}

.day div {
  padding: 0.8rem 0;
  color: #a1a1aa;
  font-size: 2rem;
  line-height: 125%;
}

input {
  appearance: none;
  -webkit-appearance: none;

  width: 6.4rem;
  height: 6.4rem;

  border: 2px solid #27272a;
  border-radius: 0.8rem;

  background-color: #18181b;
}

input:checked {
  background-color: #8b5cf6;
  border: 2px solid #a78bfa;
}

@media (max-width: 57rem) {
  header {
    padding: 4.8rem;
  }

  button div {
    display: none;
  }

  #form-habits {
    padding: 18rem 4.8rem 4.8rem;
  }
}