:root {
    --background-color: #f0f2f5;
    --text-color: #333;
    --container-bg: #fff;
    --primary-color: #1877f2;
    --secondary-color: #e4e6eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

body.dark-mode {
    --background-color: #18191a;
    --text-color: #e4e6eb;
    --container-bg: #242526;
    --primary-color: #2d88ff;
    --secondary-color: #3a3b3c;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    position: relative;
}

.theme-switcher {
    position: absolute;
    top: 20px;
    right: 20px;
}

#theme-toggle {
    display: none;
}

#theme-toggle + label {
    display: inline-block;
    width: 50px;
    height: 25px;
    border-radius: 25px;
    background-color: var(--secondary-color);
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s;
}

#theme-toggle + label::before {
    content: '';
    display: block;
    width: 21px;
    height: 21px;
    border-radius: 50%;
    background-color: #fff;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
}

#theme-toggle:checked + label {
    background-color: var(--primary-color);
}

#theme-toggle:checked + label::before {
    transform: translateX(25px);
}


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

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
}

.number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

#generate-btn {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#generate-btn:hover {
    filter: brightness(0.9);
}