:root {
    --bg-color: #f0f2f5;
    --container-bg-color: #fff;
    --text-color: #333;
    --number-bg-color: #eee;
    --number-text-color: #333;
    --btn-bg-color: #4CAF50;
    --btn-text-color: white;
    --box-shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg-color: #2c2c2c;
    --text-color: #f0f2f5;
    --number-bg-color: #444;
    --number-text-color: #f0f2f5;
    --btn-bg-color: #5a5a5a;
    --btn-text-color: #f0f2f5;
    --box-shadow-color: rgba(255, 255, 255, 0.1);
}

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

.theme-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
}

.theme-switch {
    display: inline-block;
    height: 34px;
    position: relative;
    width: 60px;
}

.theme-switch input {
    display:none;
}

.slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
}

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 26px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 26px;
}

input:checked + .slider {
    background-color: #2196F3;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}


.container {
    text-align: center;
    background-color: var(--container-bg-color);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px var(--box-shadow-color);
    transition: background-color 0.3s;
}

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

.lotto-games {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.number {
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 50%;
    background-color: var(--number-bg-color);
    margin: 0 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--number-text-color);
    box-shadow: 0 4px 8px var(--box-shadow-color);
    transition: background-color 0.3s, color 0.3s;
}

#generate-btn {
    background-color: var(--btn-bg-color);
    color: var(--btn-text-color);
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: background-color 0.3s;
}

#generate-btn:hover {
    background-color: #45a049;
}

body.dark-mode #generate-btn:hover {
    background-color: #444;
}

#generate-btn:active {
    transform: translateY(2px);
}