:root {
    --background-color: rgb(50, 50, 50);
    --board-color: rgb(210, 175, 115);
    --grid-color: rgba(35, 35, 35);
    --hover-color: rgb(65, 65, 65);
    --active-color: rgb(75, 75, 75);
    --icon-color: rgb(200, 200, 200);
    --black-color: rgb(50, 50, 50);
    --white-color: rgb(235, 235, 235);
    --black-border: rgb(25, 25, 25);
    --white-border: rgb(50, 50, 50);
    --marker-color: rgb(255, 50, 50);
}

* {
    margin: 0;
    box-sizing: border-box;
    user-select: none;
    overscroll-behavior: none;
}

body {
    display: flex;
    height: 100svh;
    background-color: var(--background-color);
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.25rem;
}

.board {
    position: relative;
    width: min(100%, calc(100svh - 34px - 1.5rem));
    aspect-ratio: 1 / 1;
    border-radius: 0.5rem;
    background-color: var(--board-color);
}

@media (orientation: landscape) {
    .board {
        width: auto;
        height: calc(100svh - 34px - 1.5rem);
    }
}

.grid {
    position: absolute;
    width: calc(100% - 100% / 19);
    height: calc(100% - 100% / 19);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-collapse: collapse;
}

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

.content {
    position: absolute;
    width: 100%;
    height: 100%;
    border-collapse: collapse;
}

.content td {
    position: relative;
}

.content td div {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}

.starpoint {
    width: 20%;
    height: 20%;
    background-color: var(--grid-color);
    pointer-events: none;
}

.stone {
    width: 100%;
    aspect-ratio: 1 / 1;
}

.black {
    background-color: var(--black-color);
    border: 0.5px solid var(--black-border);
}

.white {
    background-color: var(--white-color);
    border: 0.5px solid var(--white-border);
}

.marker {
    width: 30%;
    height: 30%;
    background-color: var(--marker-color);
    pointer-events: none;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 34px;
    gap: 14px;
}

.control {
    width: 34px;
    height: 34px;
    padding: 6px;
    border-radius: 0.25rem;
    color: var(--grid-color);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) {
    .control:hover {
        background-color: var(--hover-color);
    }
}

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

svg {
    stroke: var(--icon-color);
    fill: none;
    stroke-width: 100px;
    stroke-linecap: square;
}

.offscreen {
    display: none;
}