html {
    box-sizing: border-box;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

:root {
    --item-height: 60px;
    --bar-height: 24px;
    --bead-width: 60px;
    --grid-container-color: #199eff;
    --grid-item-color: inherit;
    --bar-color: #000;
    --bead-color-inactive: #fff;
    --bead-color-active: #ffcc00;
    --btn-bg-color: #e6f4ff;
    --btn-bg-color-darker: #cce9ff;
}

h1,
h2,
p {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}


.number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    background-color: #000;
    color: #fff;
    font-size: 2em;
    margin: 0;
    padding: 10px 0;
}

section.counting-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: inherit;
}

section.btn-container {
    padding: 10px 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: inherit;
}

button.btn-tool-controller {
    border: none;
    background-color: var(--btn-bg-color);
    border: 2px solid var(--btn-bg-color-darker);
    color: #000;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 1.25rem;
    padding: 8px 12px;
    margin: 10px;
    cursor: pointer;
    border-radius: 5px;
    height: auto;
    width: auto;
    transition: 200ms all ease-in-out;
}



button.btn-tool-controller:first-child:after {
    /* content:url('../chevron-up.svg'); */
    content: '\27A4';
    display: inline-block;
    font-size: large;
    /* transform: translate(5px, -3px); */
    transform: rotate(-90deg);
}
button.btn-tool-controller:last-child:before {
    content: '\27A4';
    display: inline-block;
    font-size: large;
    transform: rotate(90deg);
}

button.btn-tool-controller:hover,
button.btn-tool-controller:active {
    background-color: var(--btn-bg-color-darker);
}

button.btn-tool-controller:first-child:hover:after {
    /* transform: translate(5px, -5px); */
    transform: translateY(-1px) rotate(-90deg);
}
button.btn-tool-controller:last-child:hover:before {
    transform: translateY(1px) rotate(90deg);
}


button.btn-tool-controller:focus {
    outline-style: solid;
    outline-color: transparent;
    box-shadow: 0 0 0 4px #ffcc00;
}

.tool-container {
    display: flex;
    justify-content: center;
    padding: 0px 0;
    margin: 20px 0 0 0;
    width: auto;
}

.rod-container {
    display: flex;
    flex-direction: row;
    border: 5px solid var(--bar-color);
    background-color: var(--grid-container-color);
    justify-content: center;
}

.grid-container {
    display: grid;
    grid-template-columns: auto;
    grid-gap: 0px;
    justify-items: center;
    align-items: center;
    min-width: 80px;
    position: relative;
}

.grid-container:first-of-type {
    min-width: 100px;
}

.grid-container:last-of-type {
    min-width: 100px;
}

.grid-item {
    width: 100%;
    height: var(--item-height);
    background-color: var(--grid-item-color);
    display: flex;
    justify-content: center;
    z-index: 3;
}


button {
    width: var(--bead-width);
    height: var(--item-height);
    border-radius: 50%;
    border: 0;
    cursor: pointer;
    z-index: 5;
}

.bead {
    display: inline-block;
    visibility: hidden;
    border-radius: 50%;
    border: 1px solid var(--bar-color);
    transition: 0s;
}

.bead:focus {
    border-color: var(--bar-color);
}

.bead:hover .active {
    background-color: var(--bead-color-active);
}

.bead:hover .inactive {
    background-color: var(--bead-color-inactive);
}

.bead:active {
    background-color: var(--bead-color-active);
}

.inactive {
    visibility: visible;
    background-color: var(--bead-color-inactive);
    opacity: 1;
}

.active {
    visibility: visible;
    background-color: var(--bead-color-active);
    opacity: 1;
}

.grid-item button:first-of-type {
    grid-row: 1;
}

.grid-item button:nth-of-type(2) {
    grid-row: 2;
}

.grid-item button:nth-of-type(3) {
    grid-row: 4;
}

.grid-item button:nth-of-type(4) {
    grid-row: 5;
}

.grid-item button:nth-of-type(5) {
    grid-row: 6;
}

.grid-item button:nth-of-type(6) {
    grid-row: 7;
}

.grid-item button:last-of-type {
    grid-row: 8;
}

.bar {
    height: var(--bar-height);
    background-color: var(--bar-color);
}

.vertical-rod {
    width: 12px;
    z-index: 2;
    background-color: var(--bar-color);
    height: 100%;
    position: absolute;
    top: 0;
}