:root {
    --bg-gradient: linear-gradient(to right, #6a11cb, #2575fc);
    --container-bg: rgba(255, 255, 255, 0.1);
    --text-color: white;
    --ball-bg: linear-gradient(145deg, #e6e6e6, #ffffff);
    --ball-text: #333;
    --btn-bg: #ff4081;
    --btn-text: white;
}

[data-theme="light"] {
    --bg-gradient: linear-gradient(to right, #f5f7fa, #c3cfe2);
    --container-bg: rgba(255, 255, 255, 0.9);
    --text-color: #333;
    --ball-bg: linear-gradient(145deg, #2575fc, #6a11cb);
    --ball-text: white;
    --btn-bg: #333;
    --btn-text: white;
}

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

.container {
    text-align: center;
    background: var(--container-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    transition: background 0.3s;
}

h1 {
    font-size: 3em;
    margin-bottom: 20px;
}

#generate-btn {
    padding: 15px 30px;
    font-size: 1.2em;
    cursor: pointer;
    border: none;
    border-radius: 10px;
    background: var(--btn-bg);
    color: var(--btn-text);
    margin-top: 30px;
    transition: transform 0.2s, background 0.3s, color 0.3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

#generate-btn:hover {
    transform: scale(1.05);
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background: var(--container-bg);
    color: var(--text-color);
    border: 1px solid var(--text-color);
    transition: all 0.3s;
}

lotto-numbers {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

@keyframes pop-in {
    0% {
        transform: scale(0);
    }
    100% {
        transform: scale(1);
    }
}