body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #0A1F44, #1C1C1E);
    color: #FFFFFF;
    font-family: 'Roboto', sans-serif;
    overflow-x: hidden;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(28, 28, 30, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #62B1FF;
}

.nav-tabs {
    display: flex;
    gap: 20px;
}

.nav-tabs a {
    text-decoration: none;
    color: #FFFFFF;
    font-size: 1rem;
    position: relative;
    transition: color 0.3s ease;
}

.nav-tabs a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background: #FF5722;
    left: 0;
    bottom: -5px;
    transition: width 0.3s;
}

.nav-tabs a:hover::after {
    width: 100%;
}

.nav-tabs a:hover {
    color: #62B1FF;
    text-shadow: 0 0 10px #00E676;
}

.main-content {
    padding: 100px 20px 50px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    margin-bottom: 50px;
}

.section h2 {
    font-size: 2rem;
    color: #9C27B0;
    margin-bottom: 20px;
    position: relative;
}

.section h2::before {
    content: '';
    position: absolute;
    width: 50px;
    height: 4px;
    background: #62B1FF;
    bottom: -10px;
    left: 0;
}

.card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.card {
    background: rgba(28, 28, 30, 0.7);
    border: 1px solid #62B1FF;
    border-radius: 10px;
    padding: 20px;
    flex: 1 1 calc(33.333% - 40px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 5px;
}

.card h3 {
    margin-top: 15px;
    color: #FF5722;
    font-size: 1.2rem;
}

.card p {
    margin-top: 10px;
    line-height: 1.6;
}

.code-block {
    background: rgba(44, 44, 46, 0.8);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    color: #62B1FF;
    margin: 20px 0;
}

.code-block code {
    white-space: pre-wrap;
}

.sample-article {
    background: rgba(28, 28, 30, 0.85);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.sample-article h2 {
    color: #00E676;
    margin-bottom: 20px;
}

.sample-article pre {
    background: #1C1C1E;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

.footer {
    background: rgba(28, 28, 30, 0.9);
    color: #FFFFFF;
    text-align: center;
    padding: 20px 0;
    position: relative;
}

.footer p {
    margin: 0;
}

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgb(255, 87, 34), transparent);
    animation: aurora-move 15s linear infinite;
    z-index: -1;
}

@keyframes aurora-move {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-50px) rotate(180deg); }
    100% { transform: translateY(0) rotate(360deg); }
}

@keyframes move-particles {
    from { transform: translateY(0); }
    to { transform: translateY(20px); }
}

.particle {
    position: absolute;
    width: 5px;
    height: 5px;
    background: #FFFF00;
    border-radius: 50%;
    opacity: 0.7;
    animation: move-particles 5s infinite alternate;
}

@media (max-width: 1440px) {
    .card {
        flex: 1 1 calc(33.333% - 40px);
    }
}

@media (max-width: 1200px) {
    .main-content {
        padding: 100px 40px 50px 40px;
    }
}

@media (max-width: 1024px) {
    .card {
        flex: 1 1 calc(50% - 40px);
    }
}

@media (max-width: 768px) {
    .nav-tabs {
        flex-direction: column;
        background: rgba(28, 28, 30, 0.9);
        position: absolute;
        top: 60px;
        right: 0;
        width: 200px;
        display: none;
    }

    .nav-tabs a {
        padding: 10px 20px;
        border-bottom: 1px solid #62B1FF;
    }

    .nav-tabs.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
        cursor: pointer;
    }

    .card {
        flex: 1 1 100%;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }

    .nav-tabs a {
        font-size: 0.9rem;
    }

    .card {
        padding: 15px;
    }

    .section h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 320px) {
    .main-content {
        padding: 100px 10px 50px 10px;
    }

    .section h2 {
        font-size: 1.2rem;
    }
}