:root {
    --bg-color: #ffffff;
    --line-color: #000000;
    --dot-color: #000000;
    --cell-color: rgb(194, 13, 13);
    --button-bg-color: rgba(0, 0, 0, 0.7);
    --button-text-color: white;
}

body.dark {
    --bg-color: #000000;
    --line-color: #ffffff;
    --dot-color: #ffffff;
    --cell-color: #ffffff;
    --button-bg-color: rgba(255, 255, 255, 0.2);
    --button-text-color: white;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    background-color: var(--bg-color);
    overflow: hidden;
}

.grid-wrapper {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    transform-origin: center center;
    transition: transform 0.2s ease-in-out;
}

.grid-container {
    display: grid;
}

.grid-cell {
    border: 1px solid var(--line-color);
    box-sizing: border-box;
    width: 100%;
    height: 100%;
}

body.grid-y .grid-cell {
    border-top: 0;
    border-bottom: 0;
}

body.grid-x .grid-cell {
    border-left: 0;
    border-right: 0;
}

.grid-cell.colored {
    background-color: var(--cell-color);
}

.grid-cell:hover {
    background-color: color-mix(in srgb,
            var(--cell-color),
            #fff 10%);
}

.center-dot {
    position: relative;
    background-color: var(--dot-color) !important;
    border: none;
}

.center-dot::after {
    content: "";
    position: absolute;
    width: 30%;
    height: 30%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background: var(--bg-color);
}

#controls {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    transition: opacity 0.4s ease;
    padding: 10px;
}

#controls.hidden {
    opacity: 0;
    pointer-events: none;
}

.toggle-button,
.zoom-button {
    position: relative;
    padding: 5px 10px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s;
    zoom: 0.95;
}

.toggle-button:hover,
.zoom-button:hover {
    background-color: color-mix(in srgb,
            var(--button-bg-color),
            #fff 10%);
}

.toggle-button.active {
    background-color: color-mix(in srgb,
            var(--button-bg-color),
            #fff 20%);
}

button span {
    position: absolute;
    background: color-mix(in srgb,
            var(--button-bg-color),
            #000 20%);
    display: block;
    font-size: 60%;
    padding: 3px 5px;
    border-radius: 5px;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 1px solid var(--line-color);
    opacity: 0;

    /* Disabled by default */
    display: none;
}

button:hover span,
button:focus span {
    opacity: 1;
}

body.dark .toggle-button,
body.dark .zoom-button {
    background-color: rgba(255, 255, 255, 0.2);
    text-shadow: 0 0 2px #000;
    box-shadow: 0 0 0 1px rgb(0 0 0 / 0.8);
}

body.dark .toggle-button:hover,
body.dark .zoom-button:hover {
    background-color: rgba(255, 255, 255, 0.4);
}

body.dark .toggle-button.active {
    background-color: rgba(255, 255, 255, 1);
    color: black;
}

@keyframes blink {

    0%,
    100% {
        background-color: var(--cell-color);
    }

    50% {
        background-color: transparent;
    }
}

.grid-cell.blink-animation {
    animation: blink 1s infinite;
}

@media print {
    body.dark {
        --bg-color: #ffffff;
        --line-color: #000000;
        --dot-color: #000000;
        --cell-color: #fff;
    }

    #controls {
        display: none;
    }

    .grid-cell {
        border: 0.5px solid var(--line-color);
    }

    .center-dot,
    .grid-cell.colored {
        background: var(--line-color) !important;
        box-shadow: inset 0 0 0 1000px var(--line-color);
    }
}