html, body {
    margin: 0;
    padding: 0;
    background: #000000;
    overflow: hidden;
    font-family: "Times New Roman", serif;
}

#map {
    display: block;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

#corner {
    position: fixed;
    top: 10px;
    right: 10px;
    z-index: 3;
    display: flex;
    gap: 6px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
#corner.show { opacity: 0.55; pointer-events: auto; }
#corner:hover { opacity: 1; }

#corner button {
    width: 34px;
    height: 34px;
    font-size: 18px;
    font-family: inherit;
    color: #FFFFFF;
    background: grey;
    border: 1px solid #000000;
    cursor: pointer;
}
#corner button:hover { background: darkgrey; }

#about {
    position: fixed;
    inset: 0;
    z-index: 4;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.45);
}
#about[hidden] { display: none; }

#about .about-panel {
    position: relative;
    width: min(640px, calc(100vw - 40px));
    max-height: calc(100vh - 40px);
    overflow: auto;
    padding: 28px 24px 20px;
    color: black;
    background: rgba(255, 255, 255, 0.63);
    border: 1px solid black;
    font-size: 14px;
    line-height: 1.45;
}

#about #about-close {
    position: absolute;
    top: 6px;
    right: 8px;
    width: 28px;
    height: 28px;
    padding: 0;
    font-size: 22px;
    line-height: 1;
    color: black;
    background: transparent;
    border: none;
    cursor: pointer;
}
#about #about-close:hover { color: #444; }

#about .about-body {
    min-height: 3em;
}

#controls {
    position: fixed;
    top: 52px;
    right: 10px;
    z-index: 2;
    display: none;
    width: 200px;
    padding: 10px 14px;
    color: black;
    background: rgba(255, 255, 255, 0.63);
    border: 1px solid black;
    font-size: 13px;
}
#controls.open { display: block; }

#controls .row {
    margin: 7px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
#controls .row > label:first-child { min-width: 48px; }

#controls fieldset {
    border: 1px solid black;
    margin: 7px 0;
    padding: 4px 6px;
}
#controls legend {
    letter-spacing: 1px;
    color: black;
    padding: 0 4px;
}
#controls fieldset label {
    display: inline-block;
    width: 48%;
    margin: 1px 0;
    white-space: nowrap;
}

#controls input[type="text"], #controls select {
    background: #1a130a;
    color: white;
    border: 1px solid black;
    padding: 2px 4px;
    font-family: inherit;
}
#controls .seed input[type="text"] { flex: 1; min-width: 0; }
#controls input[type="range"] { flex: 1; }

#controls .buttons { display: none; margin-top: 10px; }
#controls .buttons.show { display: flex; }
#controls #regen {
    flex: 1;
    width: 100%;
}
#controls button {
    background: grey;
    color: white;
    border: 1px solid black;
    padding: 4px 10px;
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
}
#controls button:hover { background: darkgrey; }