:root {
    --bg-color: #f0f2f5;
    --container-bg-color: #fff;
    --text-color: #333;
    --number-bg-color: #4a90e2;
    --generate-btn-bg-color: #50e3c2;
    --generate-btn-hover-bg-color: #48c9b0;
    --box-shadow-light: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --bg-color: #2c3e50;
    --container-bg-color: #34495e;
    --text-color: #ecf0f1;
    --number-bg-color: #e74c3c;
    --generate-btn-bg-color: #3498db;
    --generate-btn-hover-bg-color: #2980b9;
    --box-shadow-light: rgba(0, 0, 0, 0.3);
}

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

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

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

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    background-color: var(--number-bg-color);
    color: #fff;
    font-size: 24px;
    font-weight: 600;
    border-radius: 50%;
    box-shadow: 0 4px 8px var(--box-shadow-light);
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

.number:hover {
    transform: scale(1.1);
}

#generate-btn {
    background-color: var(--generate-btn-bg-color);
    color: #fff;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 4px 8px var(--box-shadow-light);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

#generate-btn:hover {
    background-color: var(--generate-btn-hover-bg-color);
}

#theme-toggle-btn {
    background-color: #f39c12; /* A distinct color for the toggle button */
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px var(--box-shadow-light);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

#theme-toggle-btn:hover {
    background-color: #e67e22;
}