/* === Header === */
.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.site-logo a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-text);
}

.site-logo img {
    height: 40px;
    width: auto;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* === Header Search === */
.header-search {
    position: relative;
}

.header-search input {
    width: 220px;
    padding: 8px 36px 8px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-bg);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.header-search input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
    width: 280px;
}

.header-search button {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

/* === Hamburger Menu === */
.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.menu-toggle:hover {
    background: var(--color-bg);
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-text);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
}

/* === Sidebar / Off-Canvas Nav === */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: var(--z-overlay);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

.sidebar-nav {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100%;
    background: var(--color-surface);
    z-index: var(--z-modal);
    overflow-y: auto;
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-xl);
}

.sidebar-nav.active {
    right: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.sidebar-close:hover {
    background: var(--color-bg);
}

.sidebar-body {
    padding: var(--space-md) 0;
}

.sidebar-section-title {
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 10px var(--space-lg);
    color: var(--color-text);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.sidebar-link:hover {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

.sidebar-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* === Main Content === */
main {
    padding-top: var(--space-lg);
}

/* === Page Grid === */
.page-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    max-width: var(--max-width);
    margin: var(--space-xl) auto;
    padding: 0 var(--space-md);
}

.page-grid.with-sidebar {
    grid-template-columns: 1fr 320px;
}

.main-content {
    min-width: 0;
}

.sidebar-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* === Footer === */
.site-footer {
    background: var(--color-text);
    color: #d1d5db;
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--space-3xl);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    text-align: center;
}

.footer-logo {
    margin-bottom: var(--space-lg);
}

.footer-logo img {
    height: 36px;
    margin: 0 auto;
    filter: brightness(0) invert(1);
}

.footer-logo span {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
}

.footer-search {
    max-width: 400px;
    margin: 0 auto var(--space-xl);
    position: relative;
}

.footer-search input {
    width: 100%;
    padding: 12px 48px 12px 20px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    font-size: 0.95rem;
}

.footer-search input::placeholder {
    color: #9ca3af;
}

.footer-search input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.12);
}

.footer-search button {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    color: #d1d5db;
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm) var(--space-lg);
    margin-bottom: var(--space-xl);
}

.footer-links a {
    color: #d1d5db;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: #fff;
}

.footer-copyright {
    font-size: 0.85rem;
    color: #6b7280;
}

/* === Section Headings === */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.section-title {
    font-size: 1.4rem;
    font-weight: 700;
}

.section-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-primary);
}

/* === Ad Slots === */
.ad-slot {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
}

.ad-slot-header {
    margin: var(--space-sm) 0;
}

.ad-slot-sidebar {
    margin-bottom: var(--space-lg);
}

.ad-slot-between {
    margin: var(--space-lg) 0;
}