:root {
    --background-color: #1a1a1a;
    --text-color: #f0f0f0;
    --primary-color: #4CAF50;
    --container-bg: #2d2d2d;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --glow-color: rgba(76, 175, 80, 0.7);
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: radial-gradient(circle, #333 1px, transparent 1px);
    background-size: 10px 10px;
}

.container {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 
        0 10px 20px -5px var(--shadow-color), 
        0 20px 40px -10px var(--shadow-color), 
        0 30px 60px -15px rgba(0,0,0,0.7);
    width: 90%;
    max-width: 600px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 30px;
}

.lotto-numbers-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    min-height: 100px;
    margin-bottom: 30px;
}

#generate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px -5px var(--glow-color);
}

#generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px -8px var(--glow-color);
}