@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@600;700&family=Roboto:wght@400;500&display=swap');

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #2c2c2c;
    --accent-color: #00f5d4; 
    --background-color: #121212;
    --surface-color: #1E1E1E;
    --text-color: #E0E0E0;
    --text-light: #b3b3b3;
    --border-color: #333;
    --heading-font: 'Poppins', sans-serif;
    --body-font: 'Roboto', sans-serif;
    --shadow: 0 4px 15px rgba(0, 245, 212, 0.05);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

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

a:hover {
    color: #fff;
    text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    color: #fff;
    line-height: 1.3;
    margin-bottom: 1rem;
    font-weight: 600;
}

/* --- Header --- */
.site-header {
    background-color: var(--surface-color);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

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

.logo a {
    font-family: var(--heading-font);
    font-size: 1.75rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: 1px;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.main-nav a {
    font-weight: 500;
    font-size: 1rem;
    color: var(--text-light);
    text-decoration: none;
    padding-bottom: 0.5rem;
    position: relative;
}

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

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

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

/* --- Main Content --- */
main {
    padding: 3rem 0;
}

.with-sidebar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
}

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

.content-area, .sidebar .widget {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.hero {
    text-align: center;
    margin-bottom: 3.5rem;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 1rem auto 0;
}

.articles-grid h2, .page-header h1 {
    font-size: 2.2rem;
    padding-bottom: 0.5rem;
    margin-bottom: 2.5rem;
    text-align: center;
    position: relative;
}
.articles-grid h2::after, .page-header h1::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.post-card {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}

.post-card:hover {
    box-shadow: 0 6px 20px rgba(0, 245, 212, 0.1);
    transform: translateY(-8px);
    border-color: var(--accent-color);
}

.post-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: #fff;
}

.post-card p {
    color: var(--text-light);
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: #000;
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn:hover {
    background-color: #fff;
    color: #000;
    transform: scale(1.05);
}

/* --- Article Page --- */
.article-header {
    text-align: center;
    margin-bottom: 2rem;
}
.article-header h1 {
    font-size: 2.5rem;
}

.article-meta {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: -0.5rem;
    margin-bottom: 2.5rem;
}

.article-content h2 {
    font-size: 1.8rem;
    margin: 2.5rem 0 1rem;
    border-left: 3px solid var(--accent-color);
    padding-left: 1rem;
}

.article-content h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    color: var(--text-color);
}

.article-content p, .article-content ul, .article-content ol {
    margin-bottom: 1rem;
}

.article-content ul, .article-content ol {
    padding-left: 1.5rem;
}
.article-content ul li::marker {
    color: var(--accent-color);
}

.article-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--text-light);
    font-size: 1.1rem;
}

.cta-box {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin: 2.5rem 0;
    text-align: center;
    border-radius: 12px;
}
.cta-box h3 {
    font-size: 1.5rem;
}

/* --- Sidebar --- */
.sidebar .widget {
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.widget-title {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.widget-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--accent-color);
}

.widget-list {
    list-style: none;
}

.widget-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.widget-list li:last-child {
    border-bottom: none;
}
.widget-list a {
    color: var(--text-light);
}
.widget-list a:hover {
    color: var(--accent-color);
}

/* --- Sub-pages (Offers, About, Contact) --- */
.page-content {
    margin-top: 2rem;
}
.page-content p {
    margin-bottom: 1rem;
}
.page-content h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: var(--accent-color);
}
.page-content ul {
    padding-left: 1.5rem;
}

.offers-list .offer-item {
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    transition: border-color 0.3s ease;
}
.offers-list .offer-item:hover {
    border-color: var(--accent-color);
}
.offers-list .offer-item h3 {
    margin-bottom: 0.5rem;
}
.offers-list .offer-item a:hover {
    text-decoration: underline;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--surface-color);
    color: var(--text-light);
    text-align: center;
    padding: 2.5rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.site-footer a {
    color: var(--text-light);
}
.site-footer a:hover {
    color: var(--accent-color);
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    margin: 0 0.75rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: 1rem;
    }
    .main-nav ul {
        gap: 1rem;
        justify-content: center;
        flex-wrap: wrap;
    }
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero .subtitle {
        font-size: 1.1rem;
    }
}