:root {
    --background-color: #121212;
    --text-color: #ffffff;
    --ball-background-color: #2c2c2c;
    --ball-border-color: #444444;
    --button-background-color: #4a4a4a;
    --button-hover-background-color: #5a5a5a;
    --glow-color: #00ffff;
    --lotto-numbers-background-color: #1a1a1a;
}

body.light-mode {
    --background-color: #f0f0f0;
    --text-color: #333333;
    --ball-background-color: #e0e0e0;
    --ball-border-color: #cccccc;
    --button-background-color: #e0e0e0;
    --button-hover-background-color: #d0d0d0;
    --glow-color: #007bff;
    --lotto-numbers-background-color: #ffffff;
    --ball-text-color: #333333;
}

.theme-switch-wrapper {
    display: flex;
    align-items: center;
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.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%;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm13-56c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm43 6c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm-4-46c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm-28 63c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm-18-3c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM89 11c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM66 3c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM31 23c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM16 63c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z" fill="%231f1f1f" fill-opacity="0.4" fill-rule="evenodd"/%3E%3C/svg%3E');
}

main {
    text-align: center;
}

h1 {
    font-size: 3rem;
    margin-bottom: 2rem;
}

.lotto-numbers-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    padding: 2rem;
    border-radius: 10px;
    background-color: var(--lotto-numbers-background-color);
}

#generate-btn {
    background-color: var(--button-background-color);
    color: var(--text-color);
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 0 0 0 rgba(0, 255, 255, 0.7);
}

#generate-btn:hover, #generate-btn:focus {
    background-color: var(--button-hover-background-color);
    outline: none;
    animation: glow 1.5s infinite;
}

@keyframes glow {
    0% {
        box-shadow: 0 0 5px var(--glow-color), 0 0 10px var(--glow-color), 0 0 15px var(--glow-color);
    }
    50% {
        box-shadow: 0 0 20px var(--glow-color), 0 0 30px var(--glow-color), 0 0 40px var(--glow-color);
    }
    100% {
        box-shadow: 0 0 5px var(--glow-color), 0 0 10px var(--glow-color), 0 0 15px var(--glow-color);
    }
}

lotto-ball {
    --ball-color: #ff0000;
    display: inline-block;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--ball-background-color);
    border: 2px solid var(--ball-border-color);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2), inset 0 2px 4px rgba(255,255,255,0.1);
}