:root {
    /* Light Mode */
    --background-color: #f0f2f5;
    --container-bg: #ffffff;
    --primary-color: #4CAF50;
    --primary-hover-color: #45a049;
    --text-color: #333;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --number-bg: #f0f2f5;
    --input-bg: #ffffff;
}

[data-theme="dark"] {
    /* Dark Mode */
    --background-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --primary-color: #66bb6a;
    --primary-hover-color: #81c784;
    --text-color: #f0f0f0;
    --border-color: #444;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --number-bg: #3d3d3d;
    --input-bg: #3d3d3d;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 2rem 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background-color: var(--container-bg);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 8px var(--shadow-color);
    text-align: center;
    position: relative;
    width: 90%;
    max-width: 600px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

#generate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    width: 100%;
}

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

lotto-numbers {
    display: block;
    margin-bottom: 2rem;
}

.theme-switch-wrapper {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

#theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

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

.divider {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

.contact-form-container {
    text-align: left;
}

.contact-form-container h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 0.4rem;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 1rem;
    box-sizing: border-box;
}

.form-group textarea {
    height: 100px;
    resize: vertical;
}

.submit-btn {
    background-color: var(--text-color);
    color: var(--container-bg);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 0.4rem;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    transition: opacity 0.3s ease;
}

.submit-btn:hover {
    opacity: 0.8;
}