@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --background-color: #f0f2f5;
    --card-background: #ffffff;
    --text-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --glow-color: rgba(74, 144, 226, 0.5);
}

[data-theme="dark"] {
    --primary-color: #64b5f6;
    --secondary-color: #ffb74d;
    --background-color: #1a1a1a;
    --card-background: #2d2d2d;
    --text-color: #f0f0f0;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --glow-color: rgba(100, 181, 246, 0.3);
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
    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 65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zM33 4c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm64 4c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zM42 43c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm-31 9c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm73-3c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm-52 29c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4z" fill="%23e0e0e0" fill-opacity="0.2" fill-rule="evenodd"/%3E%3C/svg%3E');
}

header {
    width: 100%;
    padding: 1rem 2rem;
    display: flex;
    justify-content: flex-end;
    box-sizing: border-box;
}

#theme-toggle {
    background: var(--card-background);
    border: none;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 10px var(--shadow-color);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

#theme-toggle:hover {
    transform: scale(1.1);
}

main {
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: 1px 1px 2px var(--shadow-color);
}

.lotto-card {
    background-color: var(--card-background);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 20px var(--shadow-color), 0 6px 6px var(--shadow-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    width: 90%;
    max-width: 400px;
}

#lotto-numbers-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

#generate-btn {
    background-color: var(--primary-color);
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--glow-color);
}

#generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--glow-color);
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    .lotto-card {
        padding: 1.5rem;
    }

    #generate-btn {
        font-size: 1rem;
    }
}