:root {
    color-scheme: light;
    --bg: #f8f5f0;
    --text: #161616;
    --panel: #ffffff;
    --shadow: rgba(20, 20, 20, 0.15);
    --button-bg: #1b7f41;
    --button-bg-hover: #166a35;
    --button-text: #ffffff;
    --toggle-bg: #ffffff;
    --toggle-text: #1b1b1b;
    --toggle-border: #d1c7ba;
    --accent: #f1c40f;
    --ball-text: #1b1b1b;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0f1115;
    --text: #f4f4f4;
    --panel: #151820;
    --shadow: rgba(0, 0, 0, 0.4);
    --button-bg: #35a161;
    --button-bg-hover: #2b8a52;
    --button-text: #ffffff;
    --toggle-bg: #1e222b;
    --toggle-text: #f2f2f2;
    --toggle-border: #2f3540;
    --accent: #f1c40f;
    --ball-text: #121212;
}

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

.lotto-machine {
    text-align: center;
    background: var(--panel);
    padding: 2.5rem 3rem;
    border-radius: 20px;
    box-shadow: 0 12px 30px var(--shadow);
    min-width: min(560px, 90vw);
}

h1 {
    font-size: 3rem;
    margin: 0;
}

#generate-button {
    background-color: var(--button-bg);
    border: none;
    color: var(--button-text);
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 1.5rem 0 0;
    cursor: pointer;
    border-radius: 8px;
    box-shadow: 0 6px 14px var(--shadow);
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}

#generate-button:hover {
    background-color: var(--button-bg-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 18px var(--shadow);
}

.numbers-container {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
    gap: 16px;
}

.number-ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--accent);
    color: var(--ball-text);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 6px;
    box-shadow: 0 6px 14px var(--shadow);
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--toggle-bg);
    color: var(--toggle-text);
    border: 1px solid var(--toggle-border);
    border-radius: 999px;
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.3s ease, background-color 0.3s ease, color 0.3s ease;
    box-shadow: 0 6px 14px var(--shadow);
}

.theme-toggle:hover {
    transform: translateY(-1px);
}

.theme-icon {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--toggle-text);
    box-shadow: inset -4px -4px 0 rgba(0, 0, 0, 0.2);
}

html[data-theme="dark"] .theme-icon {
    box-shadow: inset 4px 4px 0 rgba(255, 255, 255, 0.2);
}

@media (max-width: 640px) {
    body {
        padding: 1.5rem;
    }

    .lotto-machine {
        padding: 2rem 1.5rem;
    }

    h1 {
        font-size: 2.2rem;
    }

    .toolbar {
        flex-direction: column;
        align-items: flex-start;
    }
}