@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;700&display=swap');

/* --- CSS Variables --- */
:root {
    --primary-color: #00FFFF; /* Cyan */
    --background-color: #0A192F; /* Dark Navy Blue */
    --surface-color: #172A45; /* Lighter Navy */
    --text-color: #E6F1FF; /* Light Blue/White */
    --text-muted-color: #8892B0; /* Slate Blue */
    --border-color: #303C55;
    --font-family: 'Fira Code', monospace;
    --container-width: 1140px;
    --border-radius: 4px;
    --transition-speed: 0.3s ease;
}

/* --- General & Reset --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

h1, h2, h3, h4 {
    color: var(--primary-color);
    line-height: 1.3;
    margin-bottom: 1rem;
    font-weight: 700;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.4rem; }

p {
    margin-bottom: 1.2rem;
    color: var(--text-muted-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed), filter var(--transition-speed);
}

a:hover {
    filter: brightness(1.2);
    text-decoration: underline;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-weight: 700;
    font-family: var(--font-family);
    letter-spacing: 1px;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.btn:hover {
    background-color: rgba(0, 255, 255, 0.1);
    text-decoration: none;
    color: var(--primary-color);
}

/* --- Header & Navigation --- */
.site-header {
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-color);
}

.logo:hover {
    text-decoration: none;
    color: var(--primary-color);
}

.main-nav ul {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    color: var(--text-muted-color);
    font-weight: 700;
    padding: 0.5rem 0;
}

.main-nav a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

/* --- Main Content Layout --- */
.main-content {
    padding: 4rem 0;
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

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

/* --- Intro Section (Homepage) --- */
.intro-section {
    background: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 3rem;
    border: 1px solid var(--border-color);
}

/* --- Articles Section --- */
.articles-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

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

.article-card {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-speed), border-color var(--transition-speed);
}

.article-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.article-card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-card-content h3 {
    margin-top: 0;
    color: var(--text-color);
}

.article-card-content p {
    flex-grow: 1;
}

.article-card-content .btn {
    align-self: flex-start;
    margin-top: 1rem;
}

/* --- Sidebar --- */
.sidebar-widget {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.sidebar-widget h3 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 0;
    font-size: 1.2rem;
}

.sidebar-widget ul {
    margin-top: 1rem;
}

.sidebar-widget li {
    margin-bottom: 0.75rem;
}

.sidebar-widget li a::before {
    content: '>> ';
    color: var(--primary-color);
}

.sidebar-widget p {
    font-size: 0.9rem;
}

/* --- Single Article Page --- */
.article-full {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.article-header {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
}

.article-header h1 {
    margin-bottom: 0.5rem;
}

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

.article-content h2,
.article-content h3 {
    margin-top: 2.5rem;
}

.article-content ul {
    list-style-type: none;
    padding-left: 1rem;
    margin-bottom: 1rem;
}

.article-content li {
    margin-bottom: 0.5rem;
    color: var(--text-muted-color);
    position: relative;
    padding-left: 20px;
}
.article-content li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.article-content blockquote {
    border-left: 3px solid var(--primary-color);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-muted-color);
}

.cta-section {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.1), rgba(23, 42, 69, 0.1));
    color: #ffffff;
    padding: 2.5rem;
    text-align: center;
    border-radius: var(--border-radius);
    margin-top: 3rem;
    border: 1px solid var(--primary-color);
}

.cta-section h2 {
    color: var(--primary-color);
}

.cta-section p {
    color: var(--text-muted-color);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn {
    background: var(--primary-color);
    color: var(--background-color);
    margin-top: 1rem;
    border: 1px solid var(--primary-color);
}

.cta-section .btn:hover {
    background: transparent;
    color: var(--primary-color);
}

/* --- Footer --- */
.site-footer {
    background: #0A192F;
    color: var(--text-muted-color);
    padding: 3rem 0;
    margin-top: 4rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.site-footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-links ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted-color);
    font-weight: 700;
}

.footer-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.copyright {
    font-size: 0.9rem;
}

/* --- Static Pages (About, Contact, Offers) --- */
.static-page {
    background: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.static-page h1 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}