/**
 * TechBeta Redesign - Component Styles
 * Additional component styling beyond base design system
 */

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background: var(--bg-elevated);
    transition: all var(--transition-base);
}

/* Top Header with OS Selector */
.header-top {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
}

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

.platform-selector {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.platform-selector a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.platform-selector a:hover {
    color: var(--color-primary);
}

.platform-selector i {
    font-size: 14px;
}

.header-links {
    display: flex;
    gap: var(--space-4);
    align-items: center;
}

.header-links a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.btn-icon-header {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-1);
    transition: color var(--transition-fast);
}

.btn-icon-header:hover {
    color: var(--color-primary);
}

/* Main Header */
.header-main {
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) 0;
}

.header-main-content {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.site-logo {
    flex-shrink: 0;
}

.site-logo .logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.site-logo i {
    font-size: 24px;
    color: var(--color-primary);
}

.site-logo .logo-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-navigation {
    display: flex;
    gap: var(--space-2);
    flex: 1;
}

.main-navigation .nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.main-navigation .nav-link:hover,
.main-navigation .nav-link.current {
    color: var(--color-primary);
    background: var(--bg-tertiary);
}

/* Header Search Form */
.header-search-form {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.header-search-input {
    border: none;
    background: transparent;
    padding: var(--space-2) var(--space-3);
    color: var(--text-primary);
    outline: none;
    min-width: 200px;
}

.header-search-button {
    background: var(--color-primary);
    border: none;
    color: white;
    padding: var(--space-2) var(--space-4);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.header-search-button:hover {
    background: var(--color-primary-dark);
}

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

.site-header.header-hidden {
    transform: translateY(-100%);
}

.mobile-only {
    display: none;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--bg-elevated);
    z-index: var(--z-modal);
    padding: var(--space-8) var(--space-6);
    transition: right var(--transition-slow);
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-nav-menu {
    list-style: none;
}

.mobile-nav-menu li {
    margin-bottom: var(--space-3);
}

.mobile-nav-menu li a {
    display: block;
    padding: var(--space-3);
    color: var(--text-primary);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-menu li a:hover {
    background: var(--bg-tertiary);
    color: var(--color-primary);
}

/* Add spacing for fixed header */
.site-main {
    padding-top: 140px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: var(--space-16) 0;
    margin-bottom: var(--space-12);
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: 800;
    margin-bottom: var(--space-6);
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
}

/* Search Container */
.search-container {
    position: relative;
    max-width: 700px;
    margin: 0 auto var(--space-6);
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-elevated);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.search-bar:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.search-icon {
    color: var(--text-tertiary);
    margin-right: var(--space-3);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: var(--text-lg);
    color: var(--text-primary);
    outline: none;
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

.search-clear {
    background: none;
    border: none;
    color: var(--text-tertiary);
    padding: var(--space-2);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.search-clear:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Search Filters */
.search-filters {
    justify-content: center;
    margin-top: var(--space-4);
}

.filter-select {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-elevated);
    color: var(--text-primary);
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-select:hover {
    border-color: var(--color-primary);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Search Results Dropdown */
.search-results {
    position: absolute;
    top: calc(100% + var(--space-4));
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-height: 600px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
}

.search-results.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-results-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-color);
}

.result-count {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    font-weight: 600;
}

.search-results-list {
    padding: var(--space-2);
}

.search-result-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.search-result-item:hover {
    background: var(--bg-secondary);
}

.search-result-thumb {
    width: 80px;
    height: 60px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
}

.search-result-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.search-result-content {
    flex: 1;
}

.search-result-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.search-result-title mark {
    background: rgba(102, 126, 234, 0.2);
    color: var(--color-primary);
    padding: 0 var(--space-1);
    border-radius: var(--radius-sm);
}

.search-result-excerpt {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.search-result-meta {
    display: flex;
    gap: var(--space-3);
    font-size: var(--text-xs);
}

.meta-os,
.meta-category {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--text-tertiary);
}

.meta-os svg {
    width: 14px;
    height: 14px;
}

/* Search States */
.search-loading,
.search-no-results,
.search-error {
    padding: var(--space-12);
    text-align: center;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-4);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Search Overlay */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.search-overlay.visible {
    opacity: 1;
    visibility: visible;
}

/* Popular Searches */
.popular-searches {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.popular-label {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    font-weight: 600;
}

.popular-tags {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.popular-search-tag {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.popular-search-tag:hover {
    background: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
}

/* ============================================
   SECTIONS
   ============================================ */

.categories-section,
.featured-section,
.os-section,
.latest-section {
    padding: var(--space-12) 0;
}

.section-header {
    margin-bottom: var(--space-8);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
}

/* ============================================
   CATEGORY CARDS
   ============================================ */

.category-card {
    padding: var(--space-8);
    text-align: center;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.category-icon {
    font-size: 3rem;
    line-height: 1;
}

.category-name {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.category-count {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin: 0;
}

.category-card:hover .category-name {
    color: var(--color-primary);
}

/* ============================================
   SOFTWARE CARDS
   ============================================ */

.software-card {
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.software-card-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.software-thumb {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.software-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.software-card:hover .software-thumb img {
    transform: scale(1.05);
}

.software-content {
    padding: var(--space-6);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.software-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.software-excerpt {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    flex: 1;
}

.software-meta {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    font-size: var(--text-xs);
}

/* ============================================
   OS CARDS
   ============================================ */

.os-card {
    padding: var(--space-8);
    text-decoration: none;
}

.os-icon-large {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    display: flex;
    justify-content: center;
}

.os-icon-large svg {
    width: 48px;
    height: 48px;
}

.os-name {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.os-count {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin: 0;
}

.os-card:hover .os-name {
    color: var(--color-primary);
}

/* ============================================
   SOFTWARE LIST
   ============================================ */

.software-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.software-list-item {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    transition: all var(--transition-base);
}

.software-list-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.list-item-link {
    text-decoration: none;
}

.list-item-thumb {
    width: 80px;
    height: 60px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.list-item-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.list-item-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.list-item-excerpt {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   SINGLE SOFTWARE PAGE
   ============================================ */

.software-header {
    padding: var(--space-12) 0;
    background: var(--bg-secondary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

.breadcrumb .separator {
    color: var(--text-tertiary);
}

.software-detail-title {
    font-size: var(--text-5xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
}

.software-detail-excerpt {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.software-badges {
    margin-bottom: var(--space-6);
}

.download-section {
    margin-bottom: var(--space-6);
}

.download-btn {
    margin-bottom: var(--space-2);
}

.download-note {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin: 0;
}

.quick-info {
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.info-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
}

.info-value {
    font-size: var(--text-base);
    color: var(--text-primary);
    font-weight: 600;
}

.software-content-section {
    padding: var(--space-12) 0;
}

.content-layout {
    gap: var(--space-8);
}

/* Tabs */
.tabs-header {
    display: flex;
    gap: var(--space-2);
    border-bottom: 2px solid var(--border-color);
    margin-bottom: var(--space-6);
}

.tab-button {
    padding: var(--space-4) var(--space-6);
    background: none;
    border: none;
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition-fast);
}

.tab-button:hover {
    color: var(--text-primary);
}

.tab-button.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.content-box {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
}

.content-box h2 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-6);
}

.features-list {
    list-style: none;
    padding: 0;
}

.features-list li {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border-color);
}

.features-list li:last-child {
    border-bottom: none;
}

.requirements-grid {
    display: grid;
    gap: var(--space-6);
}

.requirement-item strong {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.requirement-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* Sidebar */
.software-sidebar .card {
    margin-bottom: var(--space-6);
}

.box-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.download-details {
    margin-bottom: var(--space-6);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

.detail-value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: var(--text-sm);
}

.category-list {
    list-style: none;
    padding: 0;
}

.category-list li {
    margin-bottom: var(--space-2);
}

.category-list li a {
    display: flex;
    justify-content: space-between;
    padding: var(--space-3);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.category-list li a:hover {
    background: var(--bg-secondary);
    color: var(--color-primary);
}

.category-list .count {
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

.w-100 {
    width: 100%;
}

.related-section {
    padding: var(--space-12) 0;
    background: var(--bg-secondary);
}

/* ============================================
   TAXONOMY PAGES
   ============================================ */

.taxonomy-header {
    padding: var(--space-12) 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.taxonomy-icon {
    font-size: 4rem;
    margin-bottom: var(--space-4);
}

.taxonomy-icon svg {
    width: 64px;
    height: 64px;
    color: var(--color-primary);
}

.category-icon-large {
    font-size: 4rem;
    line-height: 1;
}

.taxonomy-title {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
}

.taxonomy-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.taxonomy-count {
    margin-top: var(--space-4);
}

.software-archive-section {
    padding: var(--space-12) 0;
}

.archive-layout {
    align-items: start;
}

.filters-container {
    position: sticky;
    top: 100px;
    padding: var(--space-6);
}

.filters-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.filter-group {
    margin-bottom: var(--space-6);
}

.filter-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.archive-toolbar {
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.result-count strong {
    color: var(--color-primary);
}

.view-toggle {
    display: flex;
    gap: var(--space-2);
}

.view-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.view-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
}

.sidebar-box {
    padding: var(--space-6);
}

.popular-list {
    list-style: none;
    padding: 0;
}

.popular-list li {
    margin-bottom: var(--space-2);
}

.popular-list li a {
    display: block;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.popular-list li a:hover {
    background: var(--bg-secondary);
    color: var(--color-primary);
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination-container {
    margin-top: var(--space-8);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    list-style: none;
}

.pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.pagination .page-numbers:hover {
    background: var(--bg-elevated);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination .page-numbers.current {
    background: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-16);
}

.footer-widgets {
    padding: var(--space-12) 0;
}

.footer-grid {
    gap: var(--space-8);
}

.footer-col h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col ul li {
    margin-bottom: var(--space-2);
}

.footer-col ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    padding: var(--space-6) 0;
    border-top: 1px solid var(--border-color);
}

.footer-bottom-content {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.copyright p {
    margin: 0;
}

.footer-menu {
    list-style: none;
}

.footer-menu li a {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-menu li a:hover {
    color: var(--color-primary);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .desktop-nav {
        display: none;
    }

    .mobile-only {
        display: block;
    }

    .archive-layout {
        grid-template-columns: 1fr;
    }

    .archive-sidebar {
        order: 2;
    }

    .archive-main {
        order: 1;
        grid-column: span 1 !important;
    }

    .filters-container {
        position: static;
    }

    .content-layout {
        grid-template-columns: 1fr;
    }

    .software-sidebar {
        grid-column: span 1;
    }

    .main-content {
        grid-column: span 1 !important;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: var(--space-12) 0;
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-description {
        font-size: var(--text-base);
    }

    .search-filters {
        flex-direction: column;
        width: 100%;
    }

    .filter-select {
        width: 100%;
    }

    .software-header {
        padding: var(--space-8) 0;
    }

    .software-header-content {
        grid-template-columns: 1fr;
    }

    .software-featured-image {
        order: -1;
    }

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

    .footer-bottom-content {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .back-to-top {
        bottom: var(--space-4);
        right: var(--space-4);
    }
}