main.scss

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

:root {
  --box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

body {
  font: 400 16px/1.6 'Roboto', sans-serif;
  background: #34495e;
  color: #34495e;
  overflow-x: hidden;
}

button {
  border: none;
  outline: none;
  cursor: pointer;
}

.expense-holder {
  padding: 20px 30px;
  border-radius: 5px;
  max-width: 510px;
  border: 1px solid;
  margin: 40px auto 0;
  background-color: #fff;
}

.exp-header {
  text-align: center;
  .balance {
    font-size: 25px;
    font-weight: bolder;
  }
}

.exp-tracker {
  display: flex;
  padding: 10px;

  .exp-box {
    min-width: 120px;

    flex: 1;

    .income-text {
      color: #2ecc71;
    }

    .expense-text {
      color: #e74c3c;
    }

    h4 {
      font-size: 24px;
      font-weight: bolder;
    }

    &:last-child {
      border-left: 1px solid #333;
    }
  }
}

@media screen and (max-width: 600px) {
  .expense-holder {
    padding: 20px 15px;
    max-width: 345px;
  }

  .exp-header {
    .balance {
      font-size: 20px;
    }
  }

  .exp-tracker {
    h4 {
      font-size: 20px;
    }
  }
}

.transactions {
  display: flex;
  justify-content: center;

  .item {
    flex: 1;
    padding: 0 10px;
  }
}

.transactions {
  margin: 40px -10px 0;
  .input-box {
    margin-bottom: 10px;
    position: relative;

    input {
      width: 100%;
      padding: 5px 10px;
      font-size: 16px;
      outline: none;
      border: none;
      border: 1px solid #b5b5b5;
      border-radius: 3px;
    }

    .icon-box {
      padding-left: 30px;
    }
  }

  .transaction-icon {
    position: absolute;
    left: 5px;
    width: 20px;
    top: 50%;
    font-size: 25px;
    transform: translateY(-50%);
    user-select: none;

    &.expense {
      transform: translateY(-55%);
    }
  }

  .btn {
    display: block;
    width: 100%;
    padding: 7px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 3px;
    margin-top: 20px;
    color: #fff;
    outline: none;
  }

  .btn-income {
    background-color: #2ecc71;
  }

  .btn-expense {
    background-color: #e74c3c;
  }
}

.records {
  padding: 20px 0;

  .rec-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;

    h4 {
      text-align: left;
    }

    button {
      background: rgb(94, 123, 252);
      color: #fff;
      padding: 4px 10px;
      border-radius: 30px;
      font-size: 14px;
    }
  }
}

.record-menu {
  padding: 0;
  margin: 0;
  list-style: none;
  text-align: left;
  li {
    padding: 2px 18px;
    margin-bottom: 15px;
    border-radius: 3px;
    box-shadow: 0px 0px 4px #b3b3b3;
    font-size: 20px;
    display: flex;
    align-items: center;
    position: relative;
    user-select: none;

    .inc-number {
      margin-left: auto;
    }

    &:hover button {
      opacity: 1;
    }
  }

  .income {
    &::after {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      background-color: #2ecc71;
      height: 100%;
      width: 7px;
    }
  }

  .expense {
    &::after {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      background-color: #e74c3c;
      height: 100%;
      width: 7px;
    }
  }

  button {
    font-size: 18px;
    background: transparent;
    color: red;
    position: absolute;
    left: -25px;
    padding: 10px;
    opacity: 0;
    transition: opacity 0.3s ease-out;
  }
}

input[type='number'] {
  -moz-appearance: textfield;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}