:root {
    --bg-color: #f0f2f5;
    --container-bg: #ffffff;
    --text-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #ffffff;
    --shadow-color: rgba(255, 255, 255, 0.05);
}

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

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

.theme-toggle {
    position: absolute;
    top: 10px;
    right: 10px;
}

#theme-btn {
    padding: 8px 12px;
    font-size: 14px;
    background: transparent;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#theme-btn:hover {
    opacity: 0.8;
}

h1 {
    margin-bottom: 30px;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.lotto-ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    color: #fff;
    background-image: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

#generate-btn {
    padding: 15px 30px;
    font-size: 18px;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#generate-btn:hover {
    background-color: #0056b3;
}