:root {
    --primary-color: #2563eb;
    --secondary-color: #1e293b;
    --bg-body: #f3f4f6;
    --bg-card: #ffffff;
    --text-main: #1f2937;
    --text-light: #6b7280;
    --border-radius: 12px;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --logo-view-color: #000000;
}

[data-theme="dark"] {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --text-main: #f1f5f9;
    --text-light: #94a3b8;
    --secondary-color: #334155;
    --logo-view-color: #ffffff;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.4;
    transition: var(--transition);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

header {
    background-color: var(--bg-card);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    position: sticky;
    top: 0; z-index: 100;
    padding: 15px 0;
    transition: var(--transition);
}

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

.header-actions {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: wrap;
    padding-bottom: 50px;
}

.back-btn-header {
    display: inline-flex; 
    align-items: center; 
    gap: 8px;
    background: var(--bg-card);
    color: var(--text-main);
    padding: 8px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.back-btn-header:hover {
    transform: translateY(-3px);
    color: var(--primary-color);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

.logo { 
    font-size: 1.2rem; 
    font-weight: 800; 
    color: var(--primary-color); 
    text-decoration: none; 
    text-transform: uppercase; 
    transition: var(--transition);
    flex-shrink: 0;
}

.logo span { 
    color: var(--logo-view-color);
    transition: var(--transition);
}

.nav-controls { display: flex; align-items: center; gap: 20px; }

.nav-links { display: flex; gap: 20px; align-items: center; }

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-main);
    cursor: pointer;
    padding: 0;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-body);
    border-radius: 50px;
    padding: 6px 15px;
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    color: var(--text-main);
    width: 120px;
}

.theme-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-center {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #f1c40f;
    position: relative;
    transition: var(--transition);
    box-shadow: 0 0 10px #f1c40f;
}

.icon-center::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 2px;
    height: 2px;
    border-radius: 50%;
    box-shadow: 0 -12px 0 #f1c40f, 0 12px 0 #f1c40f, 12px 0 0 #f1c40f, -12px 0 0 #f1c40f,
                8px -8px 0 #f1c40f, -8px 8px 0 #f1c40f, 8px 8px 0 #f1c40f, -8px -8px 0 #f1c40f;
    transition: var(--transition);
}

.icon-center::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-card);
    top: -4px;
    right: -4px;
    transition: var(--transition);
    opacity: 0;
}

[data-theme="dark"] .icon-center { background: #f1f5f9; box-shadow: 0 0 15px #f1f5f9; transform: rotate(-20deg); }
[data-theme="dark"] .icon-center::after { opacity: 0; }
[data-theme="dark"] .icon-center::before { opacity: 1; transform: translate(-2px, 0); }

main { padding: 30px 0; }

.page-title { font-size: 2rem; font-weight: 800; margin-bottom: 25px; }

.featured-post {
    display: flex; 
    background-color: var(--bg-card);
    border-radius: var(--border-radius); 
    overflow: hidden;
    box-shadow: var(--shadow-md); 
    margin-bottom: 30px;
    text-decoration: none; 
    color: inherit; 
    min-height: 350px;
    transition: var(--transition);
}

.featured-image { 
    flex: 1.2;
    background-size: cover; 
    background-position: center; 
}

.featured-content { 
    flex: 1; 
    padding: 40px; 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
}

.featured-content h2 { font-size: 1.8rem; margin-bottom: 15px; line-height: 1.2; }

.featured-content p { font-size: 1rem; color: var(--text-light); line-height: 1.6; }

.tag {
    background-color: #e0e7ff;
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    align-self: flex-start;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.posts-grid { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 25px; 
}

.card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.card:hover { transform: translateY(-5px); }

.card-image { height: 180px; background-size: cover; background-position: center; }

.card-content { padding: 15px; flex-grow: 1; }

.card-content h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--text-main); }

.card-content p { font-size: 0.85rem; color: var(--text-light); }

.hidden { display: none !important; }

.pagination-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
    padding-bottom: 50px;
    align-items: center; 
}

.page-btn {
    padding: 8px 16px;
    border: 1px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    min-width: 40px; 
}

.page-btn.active {
    background: var(--primary-color);
    color: white;
}

.page-btn:hover:not(.active):not(:disabled) {
    background: rgba(37, 99, 235, 0.1);
}

.page-btn:disabled {
    border-color: #ccc;
    color: #ccc;
    cursor: not-allowed;
}

@media (max-width: 900px) {
    .posts-grid { grid-template-columns: repeat(2, 1fr); }
    
    .menu-toggle { display: block; }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px; right: 20px;
        background: var(--bg-card);
        flex-direction: column;
        padding: 15px;
        border-radius: 12px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        z-index: 1000;
        min-width: 150px;
        gap: 15px;
    }

    .nav-links.active { display: flex; }

    .search-box input { width: 80px; }
}

@media (max-width: 600px) {
    .logo { font-size: 1.2rem; font-weight: 800; color: var(--primary-color); text-decoration: none; text-transform: uppercase; }
    .logo span { color: var(--logo-view-color); transition: var(--transition); }

    .search-box { display: flex; align-items: center; background: var(--bg-body); border-radius: 50px; padding: 6px 7px; }

    .posts-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }

    .featured-post { flex-direction: column; min-height: auto; }

    .featured-image { flex: none; height: 200px; width: 100%; }

    .featured-content { flex: 1; padding: 25px; justify-content: flex-start; }

    .featured-content h2 { font-size: 0.9rem; margin-bottom: 8px; }

    .featured-content p { font-size: 0.85rem; color: var(--text-light); display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden; }

    .card-image { height: 110px; }

    .card-content h3 { font-size: 0.9rem; }
}