* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: sans-serif;
}

body {
    display: flex;
    justify-content: center;
    padding: 2rem;
    background: #f2f2f2;
}

main {
    width: min(90vw, 900px);
}

h1 {
    margin-top: 0;
    text-align: center;
}

#board-container {
    width: 100%;
    overflow: auto;
    display: flex;
    justify-content: center;
}

#board {
    display: grid;
    grid-template-columns: repeat(100, 1fr);
    grid-template-rows: repeat(100, 1fr);

    width: min(90vw, 800px);
    aspect-ratio: 1;

    border: 1px solid #888;
    background: white;
}

.pixel {
    border: 0;
    padding: 0;
    margin: 0;

    min-width: 0;
    min-height: 0;

    cursor: pointer;
}

.pixel.selected {
    outline: 2px solid var(--selection-color, black);
    outline-offset: -2px;
    z-index: 1;
}

#pixel-dialog {
    position: fixed;
    left: 50%;
    bottom: 1.5rem;
    transform: translateX(-50%);

    width: min(90vw, 650px);

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;

    padding: 1rem 1.25rem;

    background: white;
    border: 1px solid #aaa;
    border-radius: 8px;

    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

#pixel-dialog.hidden {
    display: none;
}

.pixel-info {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.pixel-info > div {
    display: flex;
    flex-direction: column;
}

.label {
    font-size: 0.75rem;
    color: #666;
    margin-bottom: 0.2rem;
}

.pixel-editor {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#color-picker {
    width: 42px;
    height: 36px;
    padding: 2px;
}

button {
    padding: 0.5rem 0.8rem;
    cursor: pointer;
}

button:disabled {
    cursor: default;
    opacity: 0.5;
}