:root {
    --bg-color: #fce4ec; /* Light pink background */
    --text-color: #4a148c; /* Dark purple text */
    --grid-bg: #ffffff;
    --grid-border: #4a148c;
    --cell-border: #f3e5f5;
    --btn-bg: #ec407a; /* Pink button */
    --btn-hover: #d81b60;
    --btn-text: #ffffff;
    --palette-border: #ffffff;
}

body.dark-mode {
    --bg-color: #263238; /* Dark blue-grey background */
    --text-color: #eceff1; /* Light grey text */
    --grid-bg: #37474f;
    --grid-border: #eceff1;
    --cell-border: #455a64;
    --btn-bg: #0097a7; /* Teal button */
    --btn-hover: #00838f;
    --palette-border: #455a64;
}

body {
    font-family: 'Press Start 2P', cursive;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    margin: 0;
    padding: 20px;
}

h1 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

#controls {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    padding: 10px;
}

#color-palette {
    display: flex;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px;
    border-radius: 8px;
}

.color-box {
    width: 32px;
    height: 32px;
    border: 3px solid var(--palette-border);
    cursor: pointer;
    border-radius: 4px;
    transition: transform 0.1s;
}

.color-box:hover {
    transform: scale(1.1);
}

.color-box.selected {
    border-color: var(--text-color);
    box-shadow: 0 0 8px var(--text-color);
}

button {
    padding: 12px 18px;
    font-family: 'Press Start 2P', cursive;
    font-size: 0.7rem;
    background-color: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    cursor: pointer;
    border-radius: 6px;
    transition: background-color 0.3s, transform 0.1s;
    box-shadow: 0 4px 0 rgba(0,0,0,0.2);
}

button:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 rgba(0,0,0,0.2);
}

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

#grid-container {
    display: grid;
    grid-template-columns: repeat(20, 20px);
    grid-template-rows: repeat(20, 20px);
    border: 4px solid var(--grid-border);
    background-color: var(--grid-bg);
    margin-bottom: 20px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.grid-cell {
    width: 20px;
    height: 20px;
    background-color: var(--grid-bg);
    border: 1px solid var(--cell-border);
    box-sizing: border-box;
}

#download {
    margin-top: 10px;
}

@media (max-width: 600px) {
    #grid-container {
        grid-template-columns: repeat(20, 15px);
        grid-template-rows: repeat(20, 15px);
    }
    .grid-cell {
        width: 15px;
        height: 15px;
    }
}