*, *::before, *::after {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 
        Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

main {
    width: 50rem;
    margin: 0 auto;
}

.options, .controls {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
    font-size: 0.875rem;
}

.controls button {
    padding: 0.5rem;
    border: none;
    outline: none;
    color: white;
    font-weight: bold;
    border-radius: 0.25rem;
    cursor: pointer;
}

.controls button.green {
    background-color: #58b57a;
}

.controls button.grey {
    background-color: #b0b4b4;
}

.controls button.blue {
    background-color: #48bcb4;
}

.controls button.red {
    background-color: #c66528;
}

.options {
    justify-content: space-between;
}

.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.grid-wrapper {
    width: 50rem;
    border-radius: 0.5rem;
    overflow: hidden;
}

.grid {
    width: 50rem;
    border-collapse: collapse;
}

td {
    text-align: center;
    vertical-align: middle;
    position: relative;
    background: none;
    background-size: cover, cover;
    image-rendering: pixelated;
}

td.valid:hover, td.blocked:hover {
    filter: brightness(0.95);
}

.explored, .path {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-image: url(./assets/tiles/path.png);
    background-size: cover;
}

.explored {
    opacity: 0.15;
}