:root {
    --fretboard-height: 300;
    --half-fretboard-height: calc( var(--fretboard-height) / 2 );
    --number-of-strings: 6;
    --string-height: 10;
    --half-string-height: calc( var(--string-height) / 2 );
    --string-top-position: calc( var(--fretboard-height) / var(--number-of-strings) / 2 - var(--half-string-height) );
    --double-fretmark-position-1: calc( var(--fretboard-height) * 0.25 );
    --double-fretmark-position-2: calc( var(--fretboard-height) * 0.75 );
    --note-name-opacity: 0;
    --note-name-color: #A52422;
    --setting-component-min-width: 150px;
    --interval-background-color: #2D3142;
    --interval-font-color: #D3D3D3; 
}


* {
    margin: 0;
    padding: 0;
    font-family: Roboto;
}


body {
    background-color: #2D3142;
    font-family: Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column; 
    align-items: center;
    justify-content: center;
    height: 100%;
}


/* Setting */
.settings {
    width: 100%;
    display: flex;
    color: #2D3142;
    background-color: #77A0A9;
    padding: 0px;
    justify-content: space-between;
    font-size: 20px;
}
.settings div {
    min-width: 10%;
    margin-left: 5%;
    margin-right: 5%;
}


/* Select Instrument */
.instrument-selector-container {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.instrument-selector-label {
    margin: 15px;
    text-align: center;
}
#instrument-selector {
    display: inline-block;
    margin-bottom: 15px;
    size: 1000px;
    width: 50%;
    border: 1px solid #ccc;
    border-radius: 4px;
    cursor: pointer;
}
#instrument-selector::before {
    border-left: solid transparent;
}


.accidental-selector-container {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}
.accidental-selector-container p {
    margin: 15px;
    text-align: center;
}
.accidental-selector {
    size: 100px;
    width: 70%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}


.frets-number-selector-container {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.frets-number-selector-container label{
    margin: 15px;
    text-align: center;
}
input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button {
    color: #77A0A9;
}
input[type=number]::-moz-inner-spin-button, input[type=number]::-moz-outer-spin-button {
    color: #77A0A9;
}
input[type=number] {
    width: 35px;
    transform: translate(0%, 35%);
    background-color: #77A0A9;
    border: none;
    justify-content: space-between;
    align-items: center;
}


.show-all-notes-container {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.show-all-notes-container label {
    margin: 15px;
    text-align: center;
}
#show-all-notes {
    border: none;
    justify-content: space-between;
    align-items: center;
    transform: translate(0%, 45%);
}


.fretboard {
    display: flex;
    flex-direction: column;
    background-color: #BE975B;
    background-image: url(./images/wood-pattern.png);
    width: 100%;
    height: calc(var(--fretboard-height) * 1px);
    margin-top: 50px;
}
.string {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: row;
    position: relative;
}
.string::before {
    content: "";
    width: 100%;
    height: calc(var(--string-height) * 1px); 
    background: linear-gradient(#eee, #999);
    box-shadow: 0px 5px 10px;
    z-index: 1;
    position: absolute;
    top: calc(var(--string-top-position) * 1px);
}
.note-fret {
    display: flex;
    flex: 1;
    border-right: 10px solid;
    border-image: linear-gradient(to left, #777, #bbb, #777) 1 100%;
    justify-content: center;
    align-items: center;
    position: relative;
}
.note-fret:first-child {
    background-color: #161717;
    min-width: 76px;
    border-right: 12px solid;
    flex-grow: 0;
    flex-shrink: 0;
    border-image: linear-gradient(to left, #bbb, #fff, #bbb) 1 100%;
}
.note-fret::before {
    content: attr(data-note);
    width: 33px;
    height: 33px;
    border-radius: 50%;
    line-height: 33px;
    text-align: center;
    background-color: var(--note-name-color);
    color: lightgray;
    opacity: var(--note-name-opacity);
    z-index: 2;
}
.single-fretmark::after {
    top: calc( var(--half-fretboard-height) * 1px );
    transform: translate(0, -50%);
}
.double-fretmark::before {
    top: calc( var(--double-fretmark-position-1) * 1px );
    transform: translate(-140%, -50%);
}
.double-fretmark::after {
    top: calc( var(--double-fretmark-position-2) * 1px );
    transform: translate(-140%, -50%);
}
.single-fretmark::after, .double-fretmark::after, .double-fretmark::before {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: black;
}


/* Note name section */
.note-name-section {
    width: 100%;
    color: lightgray;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}
.note-name-section span {
    font-weight: 10;
    font-size: 50px;
    margin: 15px;
    margin-left: 15px;
    margin-right: 15px;
    cursor: pointer;
}
.note-name-section span:hover {
    color: #77A0A9;
}


/* Interval section */
.interval-selection-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    font-size: 15px;
    color: lightgray;
    justify-content: center;
    align-items: center;
}
.interval-selection-container p {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Roboto;
    font-size: 50px;
    margin: 20px;
    margin-top: 50px;
}
.interval-selection-table {
    width: 90%;
    min-height: 120px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    flex-direction: row;
    color: lightgray;
}
.interval-selection-table-col {
    border-radius: 5px;
    box-shadow: 0px 0px 0px 5px rgba(0, 0, 0, 0.3);
    /* flex-basis: calc(10% - 10px); */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    margin: 10px;
}
.interval-button label {
    display: block;
    padding: 15px;
    margin: 15px;
    border: solid;
    border-radius: 20px;
    cursor: pointer;
    background-color: var(--interval-background-color);
    color: var(--interval-font-color);
    transition: background-color 0.3s ;
    font-size: 18px;
    font-weight: bold;
}
.interval-button label:hover {
    box-shadow: 15px 15px 10px #161717;
    border-color: var(--interval-font-color);
    /* background-color: var(--interval-font-color);
    color: var(--interval-background-color); */
}
.interval-button input[type="checkbox"]:checked + label {
    border-color: var(--interval-font-color);
    background-color: var(--interval-font-color);
    color: var(--interval-background-color);
}
.interval-selection-container input[type="checkbox"] {
    display: inline-block;
    position: absolute;
    opacity: 0;
    height: 0;
    width: 0;
}