/* --- The Quantum Ledger - Tech / Futuristic Theme --- */
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;700&display=swap');

:root {
    --font-main: 'Fira Code', monospace;
    --color-background: #0a0a1a;
    --color-surface: #14142c;
    --color-text: #e0e0e0;
    --color-text-secondary: #a0a0c0;
    --color-primary: #00f6ff; /* Neon Cyan */
    --color-secondary: #ff00ff; /* Neon Magenta */
    --color-border: #2a2a4a;
    --color-primary-glow: rgba(0, 246, 255, 0.2);
    --color-secondary-glow: rgba(255, 0, 255, 0.15);
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-background);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

a:hover {
    color: #fff;
    text-shadow: 0 0 8px var(--color-primary-glow);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: #fff;
    text-shadow: 0 0 5px var(--color-secondary-glow);
}

h1 { font-size: 2.8rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.4rem; }

/* --- Header & Navigation --- */
.site-header {
    padding: 20px 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-primary);
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.site-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}

.main-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.main-nav a {
    font-size: 1rem;
    color: var(--color-text-secondary);
    padding: 5px 0;
    position: relative;
}

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

.main-nav a:hover::after, .main-nav .active::after {
    width: 100%;
}

.main-nav a:hover, .main-nav .active {
    color: var(--color-primary);
}


/* --- Main Content Layout --- */
.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 50px 0;
}

@media (min-width: 992px) {
    .main-content {
        grid-template-columns: 3fr 1fr;
    }
}

/* --- Article Grid & Cards --- */
.article-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

@media (min-width: 768px) {
    .article-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.article-card {
    background: rgba(20, 20, 44, 0.5);
    border: 1px solid var(--color-border);
    border-radius: 5px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(5px);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 15px var(--color-primary-glow);
    border-color: var(--color-primary);
}

.article-card-image {
    position: relative;
}

.article-card-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border: none;
    border-bottom: 1px solid var(--color-border);
}

.article-card-category {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: var(--color-primary);
    color: var(--color-background);
    padding: 3px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.article-card-content {
    padding: 25px;
    flex-grow: 1;
}

.article-card-title {
    font-size: 1.3rem;
    margin: 0 0 15px;
}

.article-card-title a {
    color: #fff;
}

.article-card-excerpt {
    font-size: 0.9rem;
    margin: 0;
    color: var(--color-text-secondary);
}

/* --- Single Article Page --- */
.article-full {
    background: var(--color-surface);
    padding: 30px;
    border: 1px solid var(--color-border);
}

.article-header {
    margin-bottom: 30px;
    text-align: center;
}

.article-title {
    font-size: 2.5rem;
    margin: 0 0 15px;
    color: var(--color-primary);
}

.article-meta {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.article-meta span {
    margin: 0 10px;
}

.article-content {
    font-size: 1.1rem;
}

.article-content img {
    margin: 30px auto;
}

.article-content p {
    margin-bottom: 1.5em;
}

.article-content h2, .article-content h3 {
    margin-top: 2em;
    margin-bottom: 1em;
    color: var(--color-secondary);
}

/* --- Sidebar --- */
.sidebar {
    padding: 0;
}

.widget {
    margin-bottom: 30px;
    padding: 25px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 5px;
}

.widget-title {
    font-size: 1.3rem;
    margin: 0 0 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--color-primary);
    color: #fff;
}

.promo-text p, .related-articles a {
    font-size: 0.95rem;
    line-height: 1.7;
    margin: 0;
    color: var(--color-text-secondary);
}

.related-articles ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.related-articles li:not(:last-child) {
    margin-bottom: 10px;
}


/* --- Footer --- */
.site-footer {
    background-color: var(--color-surface);
    color: var(--color-text-secondary);
    padding: 30px 0;
    margin-top: 50px;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.site-footer p {
    margin: 0;
    font-size: 0.9rem;
    letter-spacing: 1px;
}