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

:root {
    --primary-color: #00FF7F;
    --primary-dark: #00CC66;
    --secondary-color: #FF6B00;
    --text-color: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --bg-color: #f8fafc;
    --bg-secondary: #f1f5f9;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #00FF7F 0%, #00CC66 100%);
}

[data-theme="dark"] {
    --text-color: #e2e8f0;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --white: #1e293b;
    --border-color: #334155;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.top-bar {
    background: var(--gradient-primary);
    color: #0f172a;
    padding: 0.5rem 0;
    font-size: 0.85rem;
    font-weight: 500;
}

.top-bar-content, nav, .main-container, .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.top-bar-content { display: flex; align-items: center; gap: 0.5rem; }

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    gap: 1rem;
}

.logo img { height: 48px; width: auto; display: block; }

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--primary-dark); }

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    width: 42px;
    height: 42px;
    cursor: pointer;
    color: var(--text-color);
}

.main-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    padding-top: 2rem;
    padding-bottom: 3rem;
}

@media (max-width: 900px) {
    .main-container { grid-template-columns: 1fr; }
    .ad-sidebar { order: -1; }
    .nav-links { display: none; }
}

.hero-section {
    background: var(--gradient-primary);
    border-radius: 20px;
    padding: 3rem 2rem;
    margin-bottom: 2rem;
    color: #0f172a;
}

.hero-section h1 { font-size: 2.25rem; font-weight: 800; margin-bottom: 0.5rem; }
.hero-section p { font-size: 1.1rem; opacity: 0.9; }

.adsense-block {
    margin: 1.5rem 0;
    text-align: center;
    min-height: 90px;
}

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

.post-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.post-card-image {
    height: 180px;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-secondary);
    position: relative;
}

.post-card-image--default {
    background-size: contain;
    background-repeat: no-repeat;
    background-color: #0f172a;
}

.post-featured-image--default {
    object-fit: contain;
    background: #0f172a;
    max-height: 360px;
}

.category-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--primary-color);
    color: #0f172a;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    text-transform: uppercase;
}

.post-card-body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; }

.post-card h2 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 0.75rem;
}

.post-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex: 1;
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary-dark);
    font-weight: 700;
    font-size: 0.9rem;
}

.ad-sidebar {
    background: var(--white);
    border-radius: 16px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.ad-sidebar h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.back-link:hover { color: var(--primary-dark); }

article.post-single {
    background: var(--white);
    border-radius: 20px;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.post-featured-image {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: 16px;
    margin-bottom: 2rem;
}

article.post-single h1 {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.post-single-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.post-author { font-size: 0.9rem; color: var(--text-light); margin-top: 0.5rem; }

.post-content p { margin-bottom: 1.25rem; font-size: 1.05rem; color: var(--text-secondary); }

.post-content p:first-of-type:first-letter {
    font-size: 3.5rem;
    font-weight: 800;
    float: left;
    line-height: 1;
    margin: 0.1rem 0.75rem 0 0;
    color: var(--primary-dark);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.post-tag {
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 999px;
    color: var(--text-secondary);
}

.related-posts {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.related-posts h2 { font-size: 1.25rem; margin-bottom: 1rem; }

.related-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }

.related-list a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

.related-list a:hover { color: var(--primary-dark); }

footer {
    background: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 2rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }

.footer-links a { color: var(--text-light); font-size: 0.9rem; }

.footer-links a:hover { color: var(--primary-dark); }

@media (max-width: 600px) {
    article.post-single { padding: 1.5rem; }
    article.post-single h1 { font-size: 1.65rem; }
    .hero-section h1 { font-size: 1.65rem; }
}