:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --container-bg: #fff;
    --btn-bg: #4CAF50;
    --btn-text: #fff;
    --btn-shadow: rgba(0,0,0,0.2);
    --machine-shadow: rgba(0,0,0,0.1);
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #f0f0f0;
    --container-bg: #1e1e1e;
    --btn-bg: #66bb6a;
    --btn-text: #121212;
    --btn-shadow: rgba(255,255,255,0.2);
    --machine-shadow: rgba(255,255,255,0.1);
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 15px;
    border-radius: 8px;
    border: none;
    background-color: var(--btn-bg);
    color: var(--btn-text);
    cursor: pointer;
    box-shadow: 0 4px 8px var(--btn-shadow);
    transition: 0.3s;
}

#theme-toggle:hover {
    opacity: 0.8;
}

.container {
    text-align: center;
}

.machine {
    background-color: var(--container-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 20px var(--machine-shadow);
    transition: background-color 0.3s;
}

.ball-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
}

.ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
}

#generate-btn {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 8px;
    border: none;
    box-shadow: 0 4px 8px var(--btn-shadow);
    transition: 0.3s;
}

#generate-btn:hover {
    opacity: 0.8;
    box-shadow: 0 6px 12px var(--btn-shadow);
}

/* Ball Colors */
.color-1 { background-color: #f44336; } /* Red */
.color-2 { background-color: #FF9800; } /* Orange */
.color-3 { background-color: #FFEB3B; } /* Yellow */
.color-4 { background-color: #4CAF50; } /* Green */
.color-5 { background-color: #2196F3; } /* Blue */
.color-6 { background-color: #9C27B0; } /* Purple */