:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --header-bg: #555555;
    --header-text: #ffffff;
    --occupied-color: #e74c3c;
    --empty-color: #2ecc71;
    --panel-bg: #f9f9f9;
    --button-bg: #efefef;
    --button-text: #000000;
}

[data-theme='dark'] {
    --bg-color: #1a1a1a;
    --text-color: #f1f1f1;
    --header-bg: #333333;
    --header-text: #e0e0e0;
    --occupied-color: #c0392b;
    --empty-color: #27ae60;
    --panel-bg: #2d2d2d;
    --button-bg: #444444;
    --button-text: #ffffff;
}

body {
    font-family: Arial, sans-serif;
    display: flex;
    margin: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

.grid {
    display: grid;
    grid-template-columns: 40px repeat(10, 60px);
    gap: 10px;
}

.box {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: white;
    cursor: pointer;
    border-radius: 6px;
    transition: transform 0.1s;
}

.box:active {
    transform: scale(0.95);
}

.occupied {
    background-color: var(--occupied-color);
}

.empty {
    background-color: var(--empty-color);
}

.header {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--header-bg);
    color: var(--header-text);
    border-radius: 6px;
    font-size: 11px;
    cursor: pointer;
}

.side-panel {
    margin-left: 40px;
    padding: 20px;
    background-color: var(--panel-bg);
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.stats {
    font-size: 18px;
    margin-bottom: 10px;
}

button {
    padding: 10px 15px;
    margin-top: 10px;
    cursor: pointer;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid #ccc;
    border-radius: 4px;
    transition: background-color 0.2s;
}

button:hover {
    opacity: 0.8;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
}