:root {
    --app-height: 100vh;
    --dark: rgba(2, 9, 25, 1);
    --dark0: rgba(2, 9, 25, 0);
    --light: rgba(203, 205, 208, 1);
    --light0: rgba(203, 205, 208, 0);
}

*,
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    color: var(--light);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 400;
    text-transform: uppercase;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

body {
    background-color: var(--dark);
    overflow: hidden;
}

#title {
    width: 100%;
    text-align: center;
    margin-bottom: -8rem;
    font-size: 2.5rem;
    color: white;
    line-height: 0;
}

#title span {
    font-size: 1rem;
    color: var(--light);
    display: block;
    margin: 3rem 0 -1.5rem 0;
}

button {
    display: none;
    background-color: var(--light);
    color: var(--dark);
    border: none;
    font-size: 1.2rem;
    padding: 0.2rem .8rem 0.3rem .8rem;
    cursor: pointer;
    transition: transform .8s cubic-bezier(.2, .8, .2, 1);
    margin: 0 0 1.5rem 0;
}

button:hover {
    transform: scale(1.05);
}

button:active {
    transform: scale(0.97);
    transition: transform .2s cubic-bezier(.2, .8, .2, 1);
}

#container {
    width: 100vw;
    height: var(--app-height);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

#wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#number_outer {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#number_wrapper {
    display: flex;
    height: calc(9rem + 6px);
    cursor: grab;
    overflow: hidden;
}

#number_wrapper:active {
    cursor: grabbing;
}

.number_container {
    display: flex;
    flex-direction: column;
    font-size: 2rem;
    transition: transform .4s cubic-bezier(.2, 1.5, .5, 1);
    padding: 0 .5rem;
}

.number_container:active {
    transition: transform 0.1s cubic-bezier(.2, .8, .2, 1);
}

.number {
    width: 2rem;
    height: 0;
    padding: .1rem 0 2.9rem 0;
    margin: 0 0 -2px 0;
    text-align: center;
    border-top: 1px solid var(--light);
    border-bottom: 1px solid var(--light);
}

.overlay {
    width: 100%;
    height: 4rem;
    position: relative;
    z-index: 10;
    pointer-events: none;
}

#overlay_top {
    background: linear-gradient(0deg, var(--dark0) 0%, var(--dark) 50%);
    transform: translateY(3.5rem);
}

#overlay_bottom {
    background: linear-gradient(0deg, var(--dark) 50%, var(--dark0) 100%);
    transform: translateY(-3.5rem);
}

#operation_wrapper {
    margin: -2.5rem 0 5rem 0;
}

#operation_wrapper span {
    display: inline-block;
    font-size: 2rem;
    padding: 0 .4rem;
    margin: 0;
    transition: opacity 0.3s cubic-bezier(.2, .8, .2, 1);
    cursor: pointer;
}

#name {
    text-align: center;
    font-size: 1rem;
    margin: 1rem;
    opacity: 0.9;
}

#credits {
    text-align: center;
    font-size: .5rem;
    margin: 1rem;
    opacity: 0.6;
}