:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --ball-bg-color: #eee;
    --ball-shadow-color: rgba(0, 0, 0, 0.2);
    --btn-bg-gradient: linear-gradient(145deg, #FF6B6B, #FFC371);
    --btn-text-color: #fff;
    --btn-shadow-color: rgba(0, 0, 0, 0.2);
}

body.dark-mode {
    --bg-color: #2c2c2c;
    --text-color: #f0f0f0;
    --ball-bg-color: #444;
    --ball-shadow-color: rgba(0, 0, 0, 0.4);
    --btn-bg-gradient: linear-gradient(145deg, #4b4b4b, #2c2c2c);
    --btn-text-color: #f0f0f0;
    --btn-shadow-color: rgba(0, 0, 0, 0.4);
}

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

.theme-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    cursor: pointer;
    z-index: 100;
}

.theme-switcher svg {
    stroke: var(--text-color);
}

.container {
    text-align: center;
}

h1 {
    color: var(--text-color);
    margin-bottom: 40px;
}

.lotto-balls-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

lotto-ball {
    --ball-color: var(--ball-bg-color);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2em;
    font-weight: bold;
    background: radial-gradient(circle at 30% 30%, #fff, var(--ball-color));
    box-shadow: 0 5px 15px var(--ball-shadow-color), inset 0 -2px 5px var(--ball-shadow-color);
    color: var(--text-color);
}

#generator-btn {
    padding: 15px 30px;
    font-size: 1.2em;
    color: var(--btn-text-color);
    background: var(--btn-bg-gradient);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--btn-shadow-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

#generator-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

#generator-btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px var(--btn-shadow-color);
}