@keyframes animated-gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

:root {
    --background-gradient: linear-gradient(-45deg, #e0eafc, #cfdef3, #e6dada, #f0e1e1);
    --background-color: #f0f0f0;
    --container-bg-color: #fff;
    --text-color: #000;
    --lotto-bg-color: #eee;
    --button-bg-color: #007bff;
    --button-text-color: #fff;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --background-gradient: linear-gradient(-45deg, #0f2027, #203a43, #2c5364);
    --background-color: #121212;
    --container-bg-color: #1e1e1e;
    --text-color: #fff;
    --lotto-bg-color: #333;
    --button-bg-color: #0056b3;
    --button-text-color: #fff;
    --shadow-color: rgba(255, 255, 255, 0.1);
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--text-color);
    transition: color 0.3s;
    background: var(--background-gradient);
    background-size: 400% 400%;
    animation: animated-gradient 15s ease infinite;
}

.container {
    position: relative;
    text-align: center;
    padding: 2rem;
    background-color: var(--container-bg-color);
    border-radius: 10px;
    box-shadow: 0 0 10px var(--shadow-color);
    transition: background-color 0.3s;
}

#theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    font-size: 0.8rem;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    z-index: 1000;
}

.lotto-numbers {
    margin: 2rem 0;
}

.lotto-row {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.lotto-row:last-child {
    margin-bottom: 0;
}

.lotto-row span {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--lotto-bg-color);
    font-size: 1.5rem;
    font-weight: bold;
    transition: background-color 0.3s;
}

#generate {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    cursor: pointer;
    transition: background-color 0.3s;
}

button {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    cursor: pointer;
}