:root {
    --bg-color: #f0f0f0;
    --text-color: #1a1a1a;
    --surface-bg: #ffffff;
    --surface-border: #cccccc;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --surface-bg: #2a2a2a;
    --surface-border: #444444;
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.2s ease, color 0.2s ease;
}

#app {
    text-align: center;
}

#lotto-numbers {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.lotto-ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    color: white;
}

#generate-btn {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: var(--surface-bg);
    color: var(--text-color);
    border: 1px solid var(--surface-border);
    border-radius: 4px;
}

#theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    padding: 8px 14px;
    font-size: 14px;
    cursor: pointer;
    background-color: var(--surface-bg);
    color: var(--text-color);
    border: 1px solid var(--surface-border);
    border-radius: 4px;
}