* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    color: white;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1;
}

.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 0;
}

.background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 3;
    padding: 20px;
    transition: all 0.3s ease;
    background: linear-gradient(to bottom, rgba(0,0,0,0.5), transparent);
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    background-image: none;
    padding: 13px;
}

header.scrolled .nav-link {
    color: #333;
}

header.scrolled .nav-link.download-btn {
    background-color: #FF5733;
    color: #fff;
}

header.scrolled .nav-link.download-btn:hover {
    background-color: #C44127;
}

.main-nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-link {
    color: white;
    text-decoration: underline;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-link.download-btn {
    color: white;
    text-decoration: none;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.nav-link.download-btn:hover {
    background-color: rgba(255, 255, 255, 0.4);
}

.nav-link:hover {
    color: #d3d3d3;
}

.download-btn:not(.nav-link) {
    display: inline-block;
    padding: 15px 30px;
    background-color: #FF5733;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 700;
    transition: background-color 0.3s ease;
    border: none;
}

.download-btn:not(.nav-link):hover {
    background-color: #C44127;
}

.content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: 20px;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.subtitle {
    font-size: 1.2rem;
    line-height: 1.5em;
    margin-bottom: 30px;
}

.main-btn {
    color: white;
    text-decoration: none;
    background-color: #FF5733;
    padding: 17px 35px;
    border-radius: 29px;
    font-size: 1.15rem;
    transition: background-color 0.3s ease;
    margin-bottom: 20px;
}

.main-btn:hover {
    background-color: #C44127;
}

.platforms-text {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-bottom: 15px;
}

.platform-icons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.platform-link {
    display: flex;
}

.platform-icon {
    width: 40px;
    height: 40px;
    transition: transform 0.3s ease;
}

.platform-icon:hover {
    transform: scale(1.1);
}

.site-footer {
    position: relative;
    z-index: 2;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 40px 20px;
    color: #333;
    box-shadow: 0 -4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-main {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 20px;
    color: #555;
}

.footer-legal {
    font-size: 0.9rem;
    margin-bottom: 15px;
    color: #666;
}

.footer-trademark {
    font-size: 0.85rem;
    margin-bottom: 10px;
    color: #777;
}

.footer-copyright {
    font-size: 0.8rem;
    color: #888;
}

.site-footer a {
    color: #FF5733;
    text-decoration: none;
    transition: color 0.3s ease;
}

.site-footer a:hover {
    color: #C44127;
    text-decoration: underline;
}

@media (max-width: 768px) {
    header {
        display: none;
    }

    h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .main-btn {
        padding: 12px 24px;
    }

    .site-footer {
        padding: 30px 15px;
    }

    .footer-main {
        font-size: 0.9rem;
    }

    .footer-legal {
        font-size: 0.8rem;
    }

    .footer-trademark,
    .footer-copyright {
        font-size: 0.75rem;
    }
}