:root {
    --color-background: #8896ab;
    --color-canvas-background: #95C000;
    --color-player-1: #333333;
    --color-head: #686963;
    --color-target: #DE0613;
    --color-background-button: #DEFFFC;
    --color-background-button-hover: #B2F7EF;
}

/*
   400 cells, 20x20
   .canvas__cell : empty cell, required
   Modifiers:
   .canvas__floor : floor cell
   .canvas__cell--target : target cell
   .canvas__cell--player-1 : player 1 cell
   .canvas__cell--head : player 1 head cell
*/

body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background-color: var(--color-background);
}

.container {
    margin-inline: auto;
    max-width: 500px;
    padding-inline: 1rem;
}

.home {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    justify-content: center;
}

.title {
    color: var(--color-background-button);
    margin: 0;
    text-align: center;
}

.canvas {
    background-color: var(--color-canvas-background);
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    grid-template-rows: repeat(20, 1fr);
    width: 100%;
    max-width: 400px;
    margin-inline: auto;
    aspect-ratio: 1;
    flex-shrink: 0;
}

@media all and (max-width: 600px) {
    .canvas {
	height: auto;
	width: 100%;
    }
}

.canvas__cell {
    aspect-ratio: 1;
    box-shadow: inset 0 0 0 2px var(--color-canvas-background);
    border: 2px solid var(--color-canvas-background);
}

.canvas__cell--target {
    background-color: var(--color-target);
    border-radius: 50%;
}

.canvas__cell--player-1 {
    background-color: var(--color-player-1);
    border-color: var(--color-player-1);
}

.canvas__cell--head {
    background-color: var(--color-head);
    border-color: var(--color-head);
}

.pad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    grid-template-areas:
	"corner-left-up up corner-right-up"
	"left center right"
	"corner-left-down down corner-right-down";
    width: 8rem;
    aspect-ratio: 1;
    margin: 0 auto;

}

.pad__button {
    background-color: var(--color-background-button);
    border: none;
    border-radius: 50%;
    aspect-ratio: 1;
}

.pad__button:hover {
    background-color: var(--color-background-button-hover);
}

.pad__up {
    grid-area: up;
}

.pad__left {
    grid-area: left;
}

.pad__down {
    grid-area: down;
}

.pad__right {
    grid-area: right;
}

.footer {
    text-align: center;
    padding: 0.5rem 0;
    color: white;
    font-size: 0.75rem;
    width: 100%;
    flex-shrink: 0;
}

.footer p {
    margin: 0;
    line-height: 1.5;
}

.footer a {
    color: var(--color-target);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.footer a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.footer__separator {
    margin: 0 0.5rem;
    opacity: 0.7;
}