body {
    padding-top: 60px; 
    font-family: Arial, sans-serif;
    padding: 20px;
    background-color: #F7F7F7;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center; 
}

.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.controls-wrapper {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.slider-wrapper, .key-wrapper {
    flex: 1 0 auto;
    max-width: calc(50% - 10px);
    margin: 5px;
    width: 100%;
}

.key-wrapper {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

h2, h3 {
    margin-bottom: 20px;
}

.slider-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    width: 80%;
}

table {
    width: 80%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

table td {
    padding: 10px;
    border: 1px solid #ddd;
}

.diagram-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: flex-start;
    width: 100%; 
}

.diagram, .roc {
    flex: 1 0 auto;
    text-align: center;
    margin: 1em;
    max-width: 45%;
}

.diagram canvas {
    width: 100%;
    max-width: 200px;
    height: auto;
    border: 1px solid #ddd;
    display: block;
    margin: 10px auto;
}

.key {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.key span {
    width: 20px;
    height: 20px;
    display: inline-block;
    margin-right: 5px;
}

progress {
    width: 100%;
    height: 20px;
    display: block;
    margin-bottom: 10px;
}



.metrics-box {
    border: 1px solid #8a8985;
    padding: 10px;
    margin: 10px;
}

@media (min-width: 768px) {
    .slider-container {
        flex-direction: row;
        justify-content: flex-start;
        align-items: center;
    }

    .slider-container input[type=range] {
        margin-right: 10px;
    }

    .diagram, .roc {
        max-width: 30%; 
    }

    .controls-wrapper {
        flex-direction: row;
        justify-content: space-between;
    }

    .slider-wrapper, .key-wrapper {
        width: 48%;
    }
}

@media (max-width: 480px) {
  .slider-wrapper, .key-wrapper {
    flex-direction: column;
  }
  .slider-container, .key {
    margin-bottom: 20px;
  }

}

/* ----------- iPhone 4 and 4S ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2) {

}

/* Portrait */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) {
}

/* Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: landscape) {

}

/* ----------- iPhone 5, 5S, 5C and 5SE ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 568px)
  and (-webkit-min-device-pixel-ratio: 2) {

}

/* Portrait */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 568px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) {
}

/* Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 568px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: landscape) {

}

/* ----------- iPhone 6, 6S, 7 and 8 ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 667px) 
  and (-webkit-min-device-pixel-ratio: 2) { 

}

/* Portrait */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 667px) 
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) { 

}

/* Landscape */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 667px) 
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: landscape) { 

}

/* ----------- iPhone 6+, 7+ and 8+ ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 414px) 
  and (max-device-width: 736px) 
  and (-webkit-min-device-pixel-ratio: 3) { 

}

/* Portrait */
@media only screen 
  and (min-device-width: 414px) 
  and (max-device-width: 736px) 
  and (-webkit-min-device-pixel-ratio: 3)
  and (orientation: portrait) { 

}

/* Landscape */
@media only screen 
  and (min-device-width: 414px) 
  and (max-device-width: 736px) 
  and (-webkit-min-device-pixel-ratio: 3)
  and (orientation: landscape) { 

}

/* ----------- iPhone X ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 812px) 
  and (-webkit-min-device-pixel-ratio: 3) { 

}

/* Portrait */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 812px) 
  and (-webkit-min-device-pixel-ratio: 3)
  and (orientation: portrait) { 

}

/* Landscape */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 812px) 
  and (-webkit-min-device-pixel-ratio: 3)
  and (orientation: landscape) { 

}