:root {
    --background-color: #f0f0f0;
    --text-color: #333;
    --container-bg-color: #ffffff;
    --button-bg-color: #4CAF50;
    --button-text-color: white;
    --button-hover-bg-color: #45a049;
    --lotto-number-bg-color: #fff;
    --lotto-number-text-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --background-color: #222;
    --text-color: #eee;
    --container-bg-color: #333;
    --button-bg-color: #6a0dad; /* Darker purple for dark mode button */
    --button-text-color: white;
    --button-hover-bg-color: #5a099a;
    --lotto-number-bg-color: #555;
    --lotto-number-text-color: #eee;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: sans-serif;
    display: flex;
    flex-direction: column; /* Changed to column to stack header and main */
    justify-content: flex-start; /* Align content to the top */
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    margin: 0; /* Remove default body margin */
}

main {
    flex-grow: 1; /* Allow main to take up available space */
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Align container to top within main */
    width: 100%;
    padding-top: 20px; /* Space from header */
    box-sizing: border-box; /* Include padding in width */
}

.container {
    text-align: center;
    background-color: var(--container-bg-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow-color);
    position: relative; /* For positioning the toggle button */
    width: 90%; /* Make container more responsive */
    max-width: 800px; /* Limit max width */
    margin-bottom: 20px; /* Space below container */
}

.intro-text {
    margin-bottom: 20px;
    line-height: 1.6;
    color: var(--text-color);
}

/* Navigation Bar Styles */
.main-nav {
    width: 100%;
    background-color: var(--container-bg-color); /* Use container bg for nav */
    color: var(--text-color);
    padding: 15px 20px;
    box-shadow: 0 2px 8px var(--shadow-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; /* Allow wrapping on small screens */
    box-sizing: border-box;
    position: sticky; /* Make nav sticky */
    top: 0;
    z-index: 1000; /* Ensure nav is on top */
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
    text-decoration: none;
    margin-right: 20px;
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.main-nav ul li a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-nav ul li a:hover {
    color: var(--button-bg-color);
}

@media (max-width: 600px) {
    .main-nav {
        flex-direction: column;
    }
    .main-nav ul {
        margin-top: 10px;
    }
}

.theme-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    background-color: var(--lotto-number-bg-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 2px 5px var(--shadow-color);
    transition: background-color 0.3s, box-shadow 0.3s;
}

.theme-toggle:hover {
    opacity: 0.8;
}

h1 {
    color: var(--text-color);
}

#generate-btn {
    padding: 10px 20px;
    font-size: 1.2rem;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    margin-bottom: 20px;
    box-shadow: 0 4px 8px var(--shadow-color);
    transition: background-color 0.3s, transform 0.2s, box-shadow 0.3s;
}

#generate-btn:hover {
    background-color: var(--button-hover-bg-color);
    transform: translateY(-2px);
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--lotto-number-bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--lotto-number-text-color);
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color 0.3s, color 0.3s, box-shadow 0.3s;
}

/* Contact Form Styles */
#contact-form {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

#contact-form h2 {
    color: var(--text-color);
    margin-bottom: 20px;
}

.form-group {
    width: 100%;
    margin-bottom: 15px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-color);
    font-weight: bold;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: calc(100% - 20px);
    padding: 10px;
    border: 1px solid var(--text-color);
    border-radius: 5px;
    background-color: var(--lotto-number-bg-color); /* Use a light background for inputs */
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    border-color: var(--button-bg-color);
    outline: none;
}

#contact-form button[type="submit"] {
    padding: 10px 20px;
    font-size: 1.2rem;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    margin-top: 10px;
    box-shadow: 0 4px 8px var(--shadow-color);
    transition: background-color 0.3s, transform 0.2s, box-shadow 0.3s;
    width: 100%;
    max-width: 500px; /* Match form width */
}

#contact-form button[type="submit"]:hover {
    background-color: var(--button-hover-bg-color);
    transform: translateY(-2px);
}

#form-status {
    color: var(--text-color);
    font-weight: bold;
}