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

body {
    font-family: 'JetBrains Mono', 'Fira Code', 'Source Code Pro', 'Consolas', 'Monaco', monospace;
    overflow: hidden;
    background: #1a1a1a;
    color: #ffffff;
}

.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('img/bg_library_20250823_140324.v02.jpg') center center;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    z-index: -2;
}

.dark-mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: -1;
}

.content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
    padding: 2rem;
}

.main-title {
    font-size: 4rem;
    font-weight: 300;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.8;
    font-weight: 300;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.9);
    /* background: rgba(0, 0, 0, 0.4); */
    padding: 0.2rem 0.7rem;
    border-radius: 10px;
    /* backdrop-filter: blur(3px); */
}

.navigation {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    gap: 1.5rem;
    z-index: 10;
}

.nav-link {
    color: #ffffff;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 300;
    padding: 0.75rem 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.1);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}



@media (max-width: 768px) {
    .main-title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .navigation {
        bottom: 1rem;
        right: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: 0.6rem 1.2rem;
    }
}