:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --text-color: #212529;
    --card-bg-color: #ffffff;
    --border-color: #dee2e6;
}

body.dark-theme {
    --primary-color: #0d6efd;
    --secondary-color: #adb5bd;
    --background-color: #212529;
    --text-color: #f8f9fa;
    --card-bg-color: #343a40;
    --border-color: #495057;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Header and Navigation */
header {
    background-color: var(--card-bg-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

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

nav ul li a:hover {
    color: var(--primary-color);
}

#theme-toggle-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
}

#theme-toggle-btn svg {
    width: 24px;
    height: 24px;
    fill: var(--text-color);
}

.dark-theme .sun {
    display: none;
}

.moon {
    display: none;
}

.dark-theme .moon {
    display: block;
}

.hamburger {
    display: none;
    cursor: pointer;
    background: transparent;
    border: none;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background: var(--text-color);
    transition: all 0.3s ease-in-out;
}



/* Main Content */
main {
    padding: 2rem;
    max-width: 960px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    padding: 3rem 1rem;
    background-color: var(--card-bg-color);
    border-radius: 8px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.generator, .content {
    background-color: var(--card-bg-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

h1, h2, h3 {
    color: var(--text-color);
}

h2 {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

/* Lotto Numbers */
.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.lotto-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(145deg, #4CAF50, #388E3C);
    color: white;
    font-size: 1.8rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transform: rotate(-10deg);
}

#generate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    display: block;
    width: fit-content;
    margin: 0 auto;
}

#generate-btn:hover {
    background-color: #0056b3;
}

/* Game Selector */
.game-selector {
    margin-bottom: 2rem;
    text-align: center;
}

.game-selector label {
    margin-right: 1rem;
    font-weight: 500;
}

#lotto-game {
    padding: 0.5rem;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg-color);
    color: var(--text-color);
}

/* Stats and Past Winners */
.stats, .past-winners {
    background-color: var(--card-bg-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    margin-top: 2rem;
}

#stats-content, #past-winners-content {
    padding: 1rem;
}


/* Footer */
footer {
    background-color: var(--card-bg-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 960px;
    margin: 0 auto;
}

.footer-content ul {
    list-style: none;
    display: flex;
    gap: 1rem;
    margin: 0;
    padding: 0;
}

.footer-content ul li a {
    text-decoration: none;
    color: var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: var(--card-bg-color);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: block;
    }

    .nav-links ul {
        flex-direction: column;
        padding: 1rem;
    }

    .hamburger {
        display: block;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }
}