:root {
    --color-primary: #2563eb;
    --color-secondary: #1e40af;
    --color-accent: #3b82f6;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-background: #ffffff;
    --color-background-dark: #f3f4f6;
    --color-border: #e5e7eb;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Outfit', sans-serif;
    --shadow-small: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

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

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

a:hover {
    color: var(--color-secondary);
}

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

.site-header {
    background: var(--color-background);
    box-shadow: var(--shadow-small);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.site-logo img {
    max-height: 50px;
    width: auto;
}

.primary-menu-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.primary-menu-link {
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.primary-menu-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.primary-menu-link:hover::after {
    width: 100%;
}

.site-footer {
    background: var(--color-text);
    color: var(--color-background);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-widget-title {
    color: var(--color-background);
    margin-bottom: 1rem;
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.post-card {
    background: var(--color-background);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

.post-card-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.post-card-content {
    padding: 1.5rem;
}

.post-card-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.post-card-excerpt {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.breadcrumb {
    padding: 1rem 0;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.breadcrumb-separator {
    margin: 0 0.5rem;
}

.pagination {
    margin: 2rem 0;
    text-align: center;
}

.pagination-list {
    display: inline-flex;
    list-style: none;
    gap: 0.5rem;
}

.pagination-list li a,
.pagination-list li span {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    background: var(--color-background-dark);
}

.pagination-list li .current {
    background: var(--color-primary);
    color: white;
}

.post-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.scroll-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .primary-menu-list {
        display: none;
    }

    .post-grid {
        grid-template-columns: 1fr;
    }
}