:root {
    --main-bg-color: #0B3D91;
    --accent-color: #722F37;
    --highlight-color: #C0C0C0;
    --neon-blue: #1F51FF;
    --dark-space: #050A30;
    --star-white: rgba(255,255,255,0.8);
}

body {
    background: radial-gradient(ellipse at center, var(--main-bg-color) 0%, var(--dark-space) 100%);
    color: white;
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

.header-notice {
    background: rgba(255,255,255,0.1);
    padding: 15px;
    text-align: center;
    font-size: 14px;
    border-bottom: 1px solid var(--neon-blue);
    backdrop-filter: blur(5px);
}

.navbar {
    position: sticky;
    top: 0;
    background: rgba(11, 61, 145, 0.9);
    display: flex;
    justify-content: center;
    padding: 15px 0;
    z-index: 1000;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.nav-links {
    display: flex;
    gap: 30px;
    max-width: 1200px;
    width: 100%;
    justify-content: center;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--neon-blue);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-blue);
    transition: width 0.3s ease;
}

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

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

article {
    background: rgba(255,255,255,0.05);
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
}

h2 {
    color: var(--highlight-color);
    font-size: 2.2rem;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-blue), transparent);
}

h3 {
    color: var(--highlight-color);
    font-size: 1.8rem;
    margin: 40px 0 20px;
    position: relative;
}

h3::before {
    content: '✦';
    color: var(--neon-blue);
    margin-right: 10px;
}

p {
    font-size: 1.1rem;
    margin-bottom: 25px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: rgba(0,0,0,0.3);
    border-radius: 10px;
    overflow: hidden;
}

thead {
    background: linear-gradient(90deg, var(--neon-blue), var(--accent-color));
}

th {
    padding: 15px;
    text-align: left;
    font-weight: 500;
}

td {
    padding: 0;
}

pre {
    margin: 0;
    padding: 20px;
    background: rgba(0,0,0,0.5);
    border-left: 3px solid var(--neon-blue);
    overflow-x: auto;
}

code {
    font-family: 'Courier New', monospace;
    color: #f8f8f2;
    font-size: 0.9rem;
    line-height: 1.5;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.image-card {
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 320px;
}

.image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(31, 81, 255, 0.3);
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.image-card:hover img {
    transform: scale(1.05);
}

.star-decoration {
    position: fixed;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    opacity: 0.8;
    animation: twinkle 5s infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 0.2; }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 15px;
        flex-wrap: wrap;
    }
    
    article {
        padding: 25px;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .image-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 15px;
    }
}