@import url('https://fonts.googleapis.com/css2?family=Nanum+Gothic:wght@400;700;800&display=swap');

:root {
    --page-bg: #f0f2f5;
    --text-color: #333;
    --primary-color: #4CAF50;
    --primary-hover-color: #45a049;
    --card-bg: #fff;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --muted-text: #666;
    --toggle-bg: #e9edf2;
    --toggle-text: #222;
    --toggle-border: #cfd6de;
    --ball-text: #fff;
    --button-text: #fff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --page-bg: #111417;
        --text-color: #e8edf2;
        --primary-color: #3fbf6f;
        --primary-hover-color: #37a962;
        --card-bg: #1b2127;
        --border-color: #2b333b;
        --shadow-color: rgba(0, 0, 0, 0.4);
        --muted-text: #b7c0ca;
        --toggle-bg: #222a33;
        --toggle-text: #e8edf2;
        --toggle-border: #313a44;
        --ball-text: #fff;
        --button-text: #0b0f14;
    }
}

html[data-theme="light"] {
    --page-bg: #f0f2f5;
    --text-color: #333;
    --primary-color: #4CAF50;
    --primary-hover-color: #45a049;
    --card-bg: #fff;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --muted-text: #666;
    --toggle-bg: #e9edf2;
    --toggle-text: #222;
    --toggle-border: #cfd6de;
    --ball-text: #fff;
    --button-text: #fff;
}

html[data-theme="dark"] {
    --page-bg: #111417;
    --text-color: #e8edf2;
    --primary-color: #3fbf6f;
    --primary-hover-color: #37a962;
    --card-bg: #1b2127;
    --border-color: #2b333b;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --muted-text: #b7c0ca;
    --toggle-bg: #222a33;
    --toggle-text: #e8edf2;
    --toggle-border: #313a44;
    --ball-text: #fff;
    --button-text: #0b0f14;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nanum Gothic', sans-serif;
    background-color: var(--page-bg);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
}

.header-row h1 {
    margin-bottom: 0;
}

#theme-toggle {
    background-color: var(--toggle-bg);
    color: var(--toggle-text);
    border: 1px solid var(--toggle-border);
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: 999px;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

#theme-toggle:hover {
    background-color: var(--card-bg);
}

.lotto-machine {
    background-color: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.number-group h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--ball-text);
    box-shadow: 0 2px 5px var(--shadow-color);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

#draw-button {
    background-color: var(--primary-color);
    color: var(--button-text);
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#draw-button:hover {
    background-color: var(--primary-hover-color);
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

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

    .lotto-numbers {
        flex-direction: column;
        gap: 1rem;
    }
}