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

:root {
    --background-color: #f0f2f5;
    --text-color: #333;
    --container-bg-color: #ffffff;
    --container-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --h1-color: #333;
    --p-color: #666;
    --winning-numbers-bg-color: #f7f7f7;
    --winning-numbers-border-color: #e0e0e0;
    --strong-color: #d93025;
    --btn-bg-color: #4285f4;
    --btn-text-color: #ffffff;
    --btn-hover-bg-color: #357ae8;
    --theme-btn-bg-color: #f0f0f0;
    --theme-btn-text-color: #333;
    --theme-btn-hover-bg-color: #e0e0e0;
}

body.dark-mode {
    --background-color: #202124;
    --text-color: #e8eaed;
    --container-bg-color: #303134;
    --container-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    --h1-color: #e8eaed;
    --p-color: #bdc1c6;
    --winning-numbers-bg-color: #3c4043;
    --winning-numbers-border-color: #5f6368;
    --strong-color: #f28b82;
    --btn-bg-color: #8ab4f8;
    --btn-text-color: #202124;
    --btn-hover-bg-color: #a6c9fa;
    --theme-btn-bg-color: #3c4043;
    --theme-btn-text-color: #e8eaed;
    --theme-btn-hover-bg-color: #5f6368;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    background-color: var(--container-bg-color);
    padding: 20px 40px;
    border-radius: 8px;
    box-shadow: var(--container-shadow);
    text-align: center;
    width: 100%;
    max-width: 600px;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
}

#theme-toggle-btn {
    background-color: var(--theme-btn-bg-color);
    color: var(--theme-btn-text-color);
    border: 1px solid var(--winning-numbers-border-color);
    padding: 8px 12px;
    font-size: 0.9em;
    border-radius: 20px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

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

h1 {
    color: var(--h1-color);
    font-size: 2em;
    margin-bottom: 10px;
    transition: color 0.3s;
}

p {
    color: var(--p-color);
    font-size: 1em;
    margin-bottom: 20px;
}

.winning-numbers {
    margin: 30px 0;
    padding: 20px;
    background-color: var(--winning-numbers-bg-color);
    border: 1px solid var(--winning-numbers-border-color);
    border-radius: 8px;
    font-size: 1.1em;
    transition: background-color 0.3s, border-color 0.3s;
}

.winning-numbers p {
    margin: 8px 0;
    color: var(--text-color);
}

strong {
    color: var(--strong-color);
    font-weight: 700;
    transition: color 0.3s;
}

#generate-btn {
    background-color: var(--btn-bg-color);
    color: var(--btn-text-color);
    border: none;
    padding: 15px 40px;
    font-size: 1.3em;
    font-weight: 700;
    border-radius: 28px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s, color 0.3s;
    margin-bottom: 30px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
}

#generate-btn:hover {
    background-color: var(--btn-hover-bg-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
}

#result {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
    padding: 20px;
    background-color: var(--winning-numbers-bg-color);
    border-radius: 8px;
}

.lotto-ball {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5em;
    font-weight: bold;
    color: #fff;
    text-shadow: 0 1px 1px rgba(0,0,0,0.2);
    box-shadow: inset 0 -3px 0 rgba(0,0,0,0.15), 0 4px 6px rgba(0,0,0,0.1);
    animation: bounce-in 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid rgba(255,255,255,0.3);
}

@keyframes bounce-in {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}