:root {
    --background-color: #f0f0f0;
    --container-bg-color: white;
    --text-color: #333;
    --lotto-number-bg-color: #eee;
    --history-item-bg-color: #f9f9f9;
    --button-bg-color: #4CAF50;
    --button-text-color: white;
    --button-hover-bg-color: #45a049;
    --box-shadow-color: rgba(0, 0, 0, 0.1);
    --button-shadow-color: rgba(76, 175, 80, 0.4);
    --button-hover-shadow-color: rgba(76, 175, 80, 0.6);
}

body.dark-mode {
    --background-color: #121212;
    --container-bg-color: #1e1e1e;
    --text-color: #f0f0f0;
    --lotto-number-bg-color: #333;
    --history-item-bg-color: #2c2c2c;
    --button-bg-color: #5a5a5a;
    --button-text-color: #f0f0f0;
    --button-hover-bg-color: #6a6a6a;
    --box-shadow-color: rgba(255, 255, 255, 0.1);
    --button-shadow-color: rgba(90, 90, 90, 0.4);
    --button-hover-shadow-color: rgba(106, 106, 106, 0.6);
}

body {
    background-color: var(--background-color);
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    transition: background-color 0.3s ease;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.container {
    text-align: center;
    background-color: var(--container-bg-color);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--box-shadow-color);
    position: relative;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    border-radius: 5px;
    padding: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

h1 {
    color: var(--text-color);
    margin-bottom: 30px;
}

.lotto-display {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--lotto-number-bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

#generate-btn {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 18px;
    box-shadow: 0 5px 15px var(--button-shadow-color);
    transition: all 0.3s ease;
}

#generate-btn:hover {
    background-color: var(--button-hover-bg-color);
    box-shadow: 0 8px 20px var(--button-hover-shadow-color);
}

.history {
    margin-top: 30px;
}

#history-list {
    list-style: none;
    padding: 0;
}

#history-list li {
    background-color: var(--history-item-bg-color);
    color: var(--text-color);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 5px;
    transition: background-color 0.3s ease, color 0.3s ease;
}