body {
    background-color: #121212;
    color: #fff;
}

.container {
    margin-top: 50px;
    max-width: 500px;
}

h1 {
    margin-bottom: 30px;
}

.set-row {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
}

.set-input {
    width: 70px;
    margin: 0 5px;
}

.set-input-res {
    width: 140px;
    margin: 0 5px;
}

.btn-block {
    margin-top: 20px;
}

.result {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 960px;
    margin: 10px auto;
    padding: 20px;
    background-color: #333;
    border-radius: 5px;
}

.result-recomm {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 960px;
    margin: 10px auto;
    padding: 20px;
    background-color: rgb(191, 57, 57);
    border-radius: 5px;
}

.result h3 {
    margin-bottom: 10px;
}

.result p {
    margin: 0;
}

.result-item {
    width: calc(20% - 10px);
    margin-bottom: 10px;
    padding: 10px;
    background-color: #444;
    color: #fff;
    border-radius: 3px;
  }

#calculateButton {
    margin: 20px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.ribbon {
    background-color: #a00;
    overflow: hidden;
    white-space: nowrap;
    position: absolute;
    right: -50px;
    top: 40px;
    -webkit-transform: rotate(45deg);
       -moz-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
         -o-transform: rotate(45deg);
            transform: rotate(45deg);
      -webkit-box-shadow: 0 0 10px #888;
       -moz-box-shadow: 0 0 10px #888;
            box-shadow: 0 0 10px #888;
  }
  .ribbon a {
    border: 1px solid #faa;
    color: #fff;
    display: block;
    font: bold 81.25% 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 1px 0;
    padding: 10px 50px;
    text-align: center;
    text-decoration: none;
    text-shadow: 0 0 5px #444;
  }