:root {
    --bg-color: #f0f2f5;
    --container-bg: white;
    --text-color: #333;
    --btn-bg: #008CBA;
    --btn-hover: #005f7a;
    --lotto-bg: #4CAF50;
    --lotto-text: white;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --btn-bg: #3700B3;
    --btn-hover: #4a00e0;
    --lotto-bg: #03DAC6;
    --lotto-text: #000;
    --shadow: 0 4px 8px rgba(255, 255, 255, 0.1);
}

body {
    font-family: 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, color 0.3s;
}

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

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

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

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--lotto-bg);
    color: var(--lotto-text);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    transition: background-color 0.3s, color 0.3s;
}

#generate-btn {
    background-color: var(--btn-bg);
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s;
}

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

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

#theme-btn {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

#theme-btn:hover {
    background-color: var(--text-color);
    color: var(--container-bg);
}