html, body {
    width: 100%;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    background: linear-gradient(135deg, #1d1d1f 0%, #161617 40%, #0c0c0d 100%);
    background-attachment: fixed;
}

a {
    color: inherit;
    text-decoration: none;
}


.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100px;
    box-sizing: border-box; 
    background-color: rgba(22, 22, 23, 0.7); 
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px); 
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    z-index: 1000;
    padding: 15px 20px;
}

.logo {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: #ffffff;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-item {
    font-weight: 500;
    font-size: 13px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #86868b;
    transition: color 0.3s ease;
}

.nav-item:hover, .nav-item.active {
    color: rgb(255, 255, 255);
}


.main-content {
    margin-top: 100px;
    padding: 40px 20px;
    min-height: calc(100vh - 100px);
    box-sizing: border-box;
}


@media (max-width: 480px) {
    .top-bar {
        min-height: 90px;
        padding: 12px 15px;
        gap: 8px;
    }
    .main-content {
        margin-top: 90px;
    }
    .logo {
        font-size: 14px;
        letter-spacing: 0.25em;
    }
    .nav-links {
        gap: 20px;
    }
    .nav-item {
        font-size: 14px;
        letter-spacing: 0.15em;
    }
}