:root {
    --bg-color: #121212;
    --text-color: #ffffff;
    --accent-color: #8e44ad;
    --secondary-color: #2c3e50;
    --card-bg-color: #1e1e1e;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header {
    background-color: rgba(44, 62, 80, 0.9);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    transition: background-color 0.3s ease;
}

header.scrolled {
    background-color: rgba(44, 62, 80, 1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 0.5rem;
}

nav ul {
    list-style-type: none;
    padding: 0;
    display: flex;
}

nav ul li {
    margin: 0 1rem;
}

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

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

nav ul li a:hover::after, nav ul li a.active::after {
    width: 100%;
}

nav ul li a:hover, nav ul li a.active {
    color: var(--accent-color);
}

main {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 2rem;
}

section {
    margin-bottom: 4rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

section.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

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

.hero {
    text-align: center;
    padding: 6rem 0;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--text-color);
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.cta-button:hover {
    background-color: #9b59b6;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.2);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    align-items: stretch;
}

.feature-item, .screenshot-item {
    background-color: var(--card-bg-color);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.feature-item:hover, .screenshot-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.screenshot-item {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.screenshot-item img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 5px;
    margin-bottom: 1rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-item:hover img {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.screenshot-item p {
    font-weight: bold;
    color: var(--accent-color);
    margin-top: auto;
}

.download-btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--text-color);
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.3s ease;
    margin-bottom: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.download-btn:hover {
    background-color: #9b59b6;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.2);
}

.download-btn i {
    margin-right: 0.5rem;
}

.version {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 2rem;
}

.system-requirements {
    background-color: var(--card-bg-color);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.system-requirements h3 {
    margin-top: 0;
}

.system-requirements ul {
    padding-left: 1.5rem;
}

footer {
    background-color: var(--secondary-color);
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links a {
    color: var(--text-color);
    font-size: 1.5rem;
    margin: 0 0.5rem;
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 1rem;
    }

    nav ul {
        margin-top: 1rem;
    }

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

    .footer-content {
        flex-direction: column;
    }

    .social-links {
        margin-top: 1rem;
    }
}