* {
  box-sizing: border-box;
  margin: 0;
  padding: 1px;
}

body {
  font-family: sans-serif;
  background-color: #f5f5f5;
  color: #222;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

main {
  display: grid;
}

.habit-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 8px;
}
.table td, .table th {
    vertical-align: middle;
    text-align: center;
}


#left-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#habit-list {
  background-color: #e0f0ff;
  padding: 1rem;
}

#habit-form {
  background-color: #ffe0e0;
  padding: 1rem;
}

#calendar {
  background-color: #fff6cc;
  padding: 1rem;
}

#stats {
  background-color: #d6ecff;
  padding: 1rem;
}