/* CSS Variables for Color Scheme */
:root {
    --deep-blue: #0D1B2A;
    --silver-gray: #E7F6F2;
    --neon-purple: #8E44AD;
    --fluorescent-green: #27AE60;
    --neon-yellow: #FFC300;
    --background-gradient: linear-gradient(135deg, #0D1B2A, #1B263B);
    --highlight-gradient: linear-gradient(45deg, #8E44AD, #27AE60);
    --font-family: 'Roboto', sans-serif;
}

/* Global Styles */
body {
    margin: 0;
    padding: 0;
    background: var(--background-gradient);
    color: var(--silver-gray);
    font-family: var(--font-family);
    line-height: 1.6;
}

/* Container */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 50px 0;
    background: rgba(13, 27, 42, 0.8);
    border-bottom: 2px solid var(--fluorescent-green);
}

header h1 {
    font-size: 48px;
    margin-bottom: 20px;
    background: -webkit-linear-gradient(var(--neon-purple), var(--fluorescent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    font-size: 18px;
    color: #ccc;
}

/* Navigation */
nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
}

nav a {
    color: var(--silver-gray);
    text-decoration: none;
    font-size: 16px;
    position: relative;
}

nav a::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: var(--fluorescent-green);
    transition: width 0.3s;
    position: absolute;
    bottom: -5px;
    left: 0;
}

nav a:hover::after {
    width: 100%;
}

nav a:hover {
    color: var(--fluorescent-green);
    transform: scale(1.05);
    transition: transform 0.3s;
}

/* Main Content */
main {
    padding: 40px 0;
}

article {
    background: rgba(23, 34, 45, 0.9);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

article h2, article h3, article h4 {
    color: var(--fluorescent-green);
    margin-top: 20px;
}

article pre {
    background: #1B263B;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

article code {
    color: #FFC300;
    font-family: 'Courier New', Courier, monospace;
}

article ul {
    list-style: none;
    padding: 0;
}

article ul li::before {
    content: "• ";
    color: var(--fluorescent-green);
}

/* Example Data Section */
.example-data {
    margin-top: 50px;
    padding: 20px;
    background: rgba(13, 27, 42, 0.85);
    border-left: 5px solid var(--neon-purple);
}

.example-data h3 {
    color: var(--neon-purple);
    margin-bottom: 15px;
}

.example-data ul {
    list-style: disc;
    padding-left: 20px;
}

.example-data li {
    margin-bottom: 10px;
}

/* Images Gallery */
.gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}

.gallery img {
    width: calc(25% - 10px);
    border-radius: 5px;
}

@media (max-width: 1440px) {
    .gallery img {
        width: calc(33.333% - 10px);
    }
}

@media (max-width: 1200px) {
    .gallery img {
        width: calc(50% - 10px);
    }
}

@media (max-width: 768px) {
    .gallery img {
        width: 100%;
    }
}

/* Responsive Typography */
h1 {
    font-size: 36px;
}

h2 {
    font-size: 28px;
}

h3 {
    font-size: 24px;
}

h4 {
    font-size: 20px;
}

p, li {
    font-size: 16px;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px 0;
    background: rgba(13, 27, 42, 0.8);
    border-top: 2px solid var(--fluorescent-green);
    color: #ccc;
}

.footer-note {
    font-size: 14px;
}

/* Buttons */
.button {
    display: inline-block;
    padding: 10px 20px;
    background: var(--neon-purple);
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.button:hover {
    background: var(--fluorescent-green);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

article, .example-data, .gallery {
    animation: fadeIn 1s ease-in-out;
}

/* No Scrollbars on Code Blocks */
pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Ensure no external links by styling all links without underline */
a {
    text-decoration: none;
}