body, html, #content {
    margin: 0;
    padding: 0;
    height: 100%;
    
    background: #262626;
    font-family: Helvetica, sans-serif;
}

*, *:before, *:after {
    box-sizing: border-box;
    cursor: default;
}

*:not(input):not(button):not(select):not(textarea) {
    -webkit-user-select: none;
}

:focus {
    outline: none;
}

a {
    cursor: pointer;
    color: inherit;
}

/**
 * Animations
 */

@-webkit-keyframes reveal-controls {
    0% {
        transform: translate(-50%, 10em);
    }
    
    100% {
        transform: translate(-50%, -50%);
    }
}

@-webkit-keyframes reveal-notes {
    0% {
        transform: translate(0, -20em);
    }
    
    100% {
        transform: translate(0, 0);
    }
}

/**
 * Main
 */

.main {
    position: relative;
    
    width: calc(100% - 65px);
    height: 100%;
    
    margin-left: 65px;
}

.main p {
    position: relative;
    margin: 0;
}

.main .roll {
    display: flex;
    height: 100%;
    
    flex-direction: column;
}

/** noteboard **/
.main .noteboard {
    position: relative;
    overflow: hidden;
    
    flex-basis: 100%;
}

.main .noteboard .inner {
    backface-visibility: hidden;
    perspective: 1000;
}

/* closed controls */
.main .noteboard .controls {
    position: absolute;
    top: 50%;
    left: 50%;
    
    -webkit-animation: reveal-controls 0.5s ease forwards;
    
    width: 100%;
    text-align: center;
    transform: translate(-50%, 10em);
}

.main .noteboard .controls img {
    display: block;
    margin: 0 auto 1em auto;
}

/* notes */
.main .noteboard canvas {
    -webkit-animation: reveal-notes 0.5s ease;
}

.main .noteboard .note {
    display: block;
    position: absolute;
    
    left: 0;
    bottom: 0;
    width: calc(100% / 52);
    
    border: 1px solid #262626;
}

/* black */
.main .noteboard [data-black="true"] {
    width: calc(100% / 52 * 0.6);
    border-radius: 5px;
    
    margin-left: calc(-100% / 52 * 0.6 / 2);
    z-index: 1;
    overflow: hidden;
    
    box-shadow: inset 1000em 1000em rgba(0, 0, 0, 0.2);
}

/* percussion */
.main .noteboard [data-channel="9"] {
    border-radius: 20px;
    min-height: 10px;
}

/** channel colors **/
[data-channel="0"] {
    background-color: hsl(225, 49%, 44%) !important;
}

[data-channel="1"] {
    background-color: hsl(22.5, 84%, 56%) !important;
}

[data-channel="2"] {
    background-color: hsl(45, 53%, 39%) !important;
}

[data-channel="3"] {
    background-color: hsl(67.5, 84%, 56%) !important;
}

[data-channel="4"] {
    background-color: hsl(90, 84%, 56%) !important;
}

[data-channel="5"] {
    background-color: hsl(112.5, 84%, 56%) !important;
}

[data-channel="6"] {
    background-color: hsl(135, 84%, 56%) !important;
}

[data-channel="7"] {
    background-color: hsl(157.5, 84%, 56%) !important;
}

[data-channel="8"] {
    background-color: hsl(180, 84%, 56%) !important;
}

[data-channel="9"] {
    background-color: hsl(202.5, 84%, 56%) !important;
}

[data-channel="10"] {
    background-color: hsl(247.5, 84%, 56%) !important;
}

[data-channel="11"] {
    background-color: hsl(270, 84%, 56%) !important;
}

[data-channel="12"] {
    background-color: hsl(292.5, 84%, 56%) !important;
}

[data-channel="13"] {
    background-color: hsl(315, 84%, 56%) !important;
}

[data-channel="14"] {
    background-color: hsl(337.5, 84%, 56%) !important;
}

[data-channel="15"] {
    background-color: hsl(0, 84%, 56%) !important;
}

/** keyboard **/
.main .keyboard {
    width: 100%;
    padding-bottom: 13%;
}

.main .key {
    position: absolute;
    left: 0;
    bottom: 0;
    
    background: white;
    display: inline-block;
    height: 100%;
}

.main [data-black="false"]:not(:last-child) {
    border-right: 1px solid #262626;
}

.main [data-black="true"] {
    bottom: 40%;
    background: #262626;
    
    border: 1px solid #262626;
    border-top: 0;
    
    margin-left: calc(-100% / 52 * 0.6 / 2);
    width: calc(100% / 52 * 0.6);
    height: 60%;
}

.main .key:not([data-channel="false"]) {
    box-shadow: inset 1000em 1000em rgba(0, 0, 0, 0.1);
}

.main [data-black="true"][data-channel="-1"] {
    box-shadow: inset 1000em 1000em rgba(255, 255, 255, 0.1);
}

/** sidebar controls **/
.main .control {
    position: absolute;
    top: 0;
    left: -65px;
    
    height: 100%;
    width: 50px;
    padding: 9px;
    
    background: #1e1e1e;
    text-align: center;
}

.main .control > * {
    display: block;
    margin: 0 auto 1em auto;
}

/* playback control */
.main .control .switch-play-state {
    background-image: url('../images/icons/sidebar/play.png');
}

.main .control .switch-play-state.pause {
    background-image: url('../images/icons/sidebar/pause.png');
}

/* channels */
.main .control .open-channels-window {
    background-image: url('../images/icons/sidebar/instruments.png');
}

/* set play speed */
.main .control .selector {
    border: 1px solid white;
    border-radius: 3px;
    overflow: hidden;
    
    width: 32px;
    height: 32px;
    text-align: center;
    line-height: 32px;
    
    cursor: pointer;
    color: white;
    background: none;
    
    padding: 0;
}

.main .control .selector:hover {
    background: rgba(255, 255, 255, 0.05);
}

.main .control .selector:before {
    content: '×';
    cursor: pointer;
}

.main .control .selector:active,
.main .control .selector:active:before {
    text-indent: 1px;
}

/* close opened file */
.main .control .close {
    background-image: url('../images/icons/sidebar/close.png');
    position: absolute;
    left: 9px;
    bottom: 0;
}

/** scroll **/
.main .scroll {
    position: absolute;
    top: 0;
    left: -15px;
    
    height: 100%;
    background: #1e1e1e;
}

/**
 * Channels modal
 */
.vex.vex .channels ul {
    list-style: none;
    padding: 0;
    
    width: calc(100% + 2em);
    margin: 0 0 0 -1em;
}

.vex .channels ul li {
    display: block;
    width: 100%;
    
    padding: 0 0 0 44px;
    background-position: 6px center;
    background-repeat: no-repeat;
}

.vex .channels ul li span {
    display: block;
    height: 100%;
    padding: 9px;
    
    background: white;
}

.vex .channels ul li:nth-child(2n) span {
    background: #e2e2e2;
}

.vex .channels ul li:hover, .vex .channels ul li:hover span {
    box-shadow: inset 1000em 1000em rgba(0, 0, 0, 0.15);
}

/** icons **/
.vex .channels ul li.piano {
    background-image: url('../images/icons/instruments/piano.png');
}

.vex .channels ul li.percussive {
    background-image: url('../images/icons/instruments/percussive.png');
}

.vex .channels ul li.percussion {
    background-image: url('../images/icons/instruments/percussion.png');
}

.vex .channels ul li.effect {
    background-image: url('../images/icons/instruments/effect.png');
}

.vex .channels ul li.brass {
    background-image: url('../images/icons/instruments/brass.png');
}

.vex .channels ul li.pipe {
    background-image: url('../images/icons/instruments/pipe.png');
}

.vex .channels ul li.string {
    background-image: url('../images/icons/instruments/string.png');
}

.vex .channels ul li.synth {
    background-image: url('../images/icons/instruments/synth.png');
}

.vex .channels ul li.guitar {
    background-image: url('../images/icons/instruments/guitar.png');
}

.vex .channels ul li.orchestra {
    background-image: url('../images/icons/instruments/orchestra.png');
}

.vex .channels ul li.bass {
    background-image: url('../images/icons/instruments/bass.png');
}

.vex .channels ul li.organ {
    background-image: url('../images/icons/instruments/organ.png');
}

/** actions **/
.vex .channels li button.sound, .vex .channels li button.notes {
    width: 16px;
    height: 16px;
}

.vex .channels li button.sound {
    background-image: url('../images/icons/instruments/sound-on.png');
}

.vex .channels li button.sound.off {
    background-image: url('../images/icons/instruments/sound-off.png');
}

.vex .channels li button.notes {
    background-image: url('../images/icons/instruments/notes-on.png');
}

.vex .channels li button.notes.off {
    background-image: url('../images/icons/instruments/notes-off.png');
}

/**
 * UI Components
 */

/** scroll **/
.scroll, ::-webkit-scrollbar {
    height: 200px;
    width: 15px;
    
    overflow: hidden;
    position: relative;
}

::-webkit-scrollbar-track {
    background: #262626;
}

.scroll .position, ::-webkit-scrollbar-thumb {
    display: block;
    width: 100%;
    
    position: absolute;
    height: 5%;
    min-height: 20px;
    
    transform: translate(0, 50%);
    background: rgba(255, 255, 255, 0.15);
}

.scroll .position:hover, ::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}