/* ==========================================================================
   Error Library V2 - Pure CSS Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Colors - V2 Dark Theme Accents */
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-secondary: #64748b;

    --color-success: #16a34a;
    --color-warning: #f59e0b;
    --color-error: #dc2626;
    --color-info: #3b82f6;

    /* Backgrounds */
    --color-bg: #f8fafc;
    --color-bg-card: #ffffff;
    --color-bg-dark: #0f172a;
    --color-bg-dark-secondary: #1e293b;
    --color-border: #e2e8f0;

    /* Text */
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-text-light: #f8fafc;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1);

    /* Container */
    --container-max: 1200px;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    text-decoration: underline;
}

code, pre {
    font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.main-content {
    flex: 1;
}

/* Two Column Layout for Error Page */
.two-column {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-xl);
    padding: var(--space-xl) 0;
}

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

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

/* --------------------------------------------------------------------------
   Header - V2 Dark Theme
   -------------------------------------------------------------------------- */
.header {
    background: var(--color-bg-dark);
    color: var(--color-text-light);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: white;
    text-decoration: none;
}

.logo:hover {
    text-decoration: none;
}

.logo-accent {
    color: var(--color-primary);
}

.logo-icon {
    margin-right: 0.5rem;
    font-size: 1.5rem;
}

/* Nav Menu - V2 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link {
    padding: 0.5rem 0.75rem;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.nav-link:hover {
    color: white;
    background: var(--color-bg-dark-secondary);
    text-decoration: none;
}

.nav-link.active {
    color: white;
    background: var(--color-primary);
}

/* Language Switcher */
.lang-switch {
    display: flex;
    gap: var(--space-xs);
}

.lang-link {
    padding: var(--space-sm) 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-decoration: none;
}

.lang-link:hover {
    color: white;
    text-decoration: none;
}

.lang-link.active {
    background: var(--color-bg-dark-secondary);
    color: white;
}

/* --------------------------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------------------------- */
.breadcrumb {
    background: white;
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 0;
}

.breadcrumb-inner {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

.breadcrumb-separator {
    margin: 0 var(--space-sm);
}

/* --------------------------------------------------------------------------
   Error Header Card - V2
   -------------------------------------------------------------------------- */
.error-header-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.error-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-error {
    background: #fef2f2;
    color: var(--color-error);
}

.badge-warning {
    background: #fffbeb;
    color: var(--color-warning);
}

.badge-info {
    background: #eff6ff;
    color: var(--color-info);
}

.badge-success {
    background: #f0fdf4;
    color: var(--color-success);
}

.badge-category {
    background: var(--color-bg);
    color: var(--color-text-secondary);
}

.error-code-display {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.error-code-display code {
    color: var(--color-text);
    background: var(--color-bg);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.error-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-bg-dark);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.error-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
}

.meta-item strong {
    color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Source Banner - V2
   -------------------------------------------------------------------------- */
.source-banner {
    background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.source-banner-icon {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.source-banner-text {
    flex: 1;
}

.source-banner-title {
    font-weight: 600;
    color: #1e40af;
    font-size: 0.875rem;
}

.source-banner-desc {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Content Sections - V2
   -------------------------------------------------------------------------- */
.section-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.section-icon {
    width: 28px;
    height: 28px;
    background: #eff6ff;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-bg-dark);
}

.section-subtitle {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-left: auto;
}

.description-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.75;
}

/* --------------------------------------------------------------------------
   Cause Cards - V2
   -------------------------------------------------------------------------- */
.cause-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: border-color 0.2s;
}

.cause-card:hover {
    border-color: var(--color-primary);
}

.cause-card:last-child {
    margin-bottom: 0;
}

.cause-content {
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.cause-icon {
    width: 32px;
    height: 32px;
    background: #fef3c7;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.cause-text {
    flex: 1;
}

.cause-title {
    font-weight: 600;
    color: var(--color-bg-dark);
    margin-bottom: 0.25rem;
}

.cause-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Solution Cards - V2 Collapsible
   -------------------------------------------------------------------------- */
.solution-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    overflow: hidden;
}

.solution-card:last-child {
    margin-bottom: 0;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.solution-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.solution-tag.difficulty-easy {
    background: #f0fdf4;
    color: var(--color-success);
}

.solution-tag.difficulty-medium {
    background: #fffbeb;
    color: var(--color-warning);
}

.solution-tag.difficulty-advanced {
    background: #fef2f2;
    color: var(--color-error);
}

/* Expand Button */
.solution-expand {
    width: 100%;
    padding: 0.75rem var(--space-md);
    background: var(--color-bg);
    border: none;
    border-top: 1px solid var(--color-border);
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.2s;
}

.solution-expand:hover {
    background: #eff6ff;
}

.solution-expand-icon {
    transition: transform 0.2s;
}

.solution-card.expanded .solution-expand-icon {
    transform: rotate(180deg);
}

/* Solution Body - Hidden by default */
.solution-body {
    display: none;
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.solution-card.expanded .solution-body {
    display: block;
}

/* Steps */
.steps-list {
    counter-reset: step;
}

.step-item {
    display: flex;
    gap: var(--space-md);
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--color-border);
}

.step-item:last-child {
    border-bottom: none;
}

.step-number {
    counter-increment: step;
    width: 24px;
    height: 24px;
    background: #eff6ff;
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.step-number::before {

}

.step-content {
    flex: 1;
}

.step-instruction {
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

/* Code Block */
.code-block {
    background: var(--color-bg-dark-secondary);
    color: #e2e8f0;
    padding: 0.75rem var(--space-md);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    margin: var(--space-sm) 0;
    position: relative;
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
}

.copy-btn {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: #374151;
    border: none;
    color: #9ca3af;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    cursor: pointer;
}

.copy-btn:hover {
    background: #4b5563;
    color: white;
}

.step-note {
    background: #fffbeb;
    border-left: 3px solid var(--color-warning);
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
    color: #92400e;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-top: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Search More Section
   -------------------------------------------------------------------------- */
.search-more {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    margin-top: var(--space-lg);
}

.search-more-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.search-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.search-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--color-primary);
    text-decoration: none;
    transition: border-color 0.2s;
}

.search-link:hover {
    border-color: var(--color-primary);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Sidebar Cards - V2
   -------------------------------------------------------------------------- */
.sidebar-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.sidebar-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Related Errors */
.related-error {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-bg);
    text-decoration: none;
    color: inherit;
}

.related-error:last-child {
    border-bottom: none;
}

.related-error:hover {
    color: var(--color-primary);
}

.related-code {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    background: var(--color-bg);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

.related-text {
    font-size: 0.8125rem;
    flex: 1;
}

/* --------------------------------------------------------------------------
   Data Sources Footer
   -------------------------------------------------------------------------- */
.data-sources {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    margin-top: var(--space-lg);
}

.data-sources-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.data-sources-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.data-source-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.6875rem;
    padding: 0.25rem 0.625rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    text-align: center;
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, var(--color-bg) 0%, #eff6ff 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-2xl);
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    color: var(--color-bg-dark);
}

.hero-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero-search {
    display: flex;
    max-width: 500px;
    margin: 0 auto;
    gap: var(--space-sm);
}

.hero-search-input {
    flex: 1;
    padding: var(--space-md);
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
}

.hero-search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.hero-search-btn {
    padding: var(--space-md) var(--space-xl);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
}

.hero-search-btn:hover {
    background: var(--color-primary-dark);
}

/* --------------------------------------------------------------------------
   Category & Software Grid
   -------------------------------------------------------------------------- */
.section {
    margin-bottom: var(--space-2xl);
}

.section-heading {
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
    color: var(--color-bg-dark);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.category-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.category-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.category-icon {
    font-size: 1.5rem;
}

.category-name {
    font-size: 1.125rem;
    font-weight: 600;
}

.software-list {
    list-style: none;
}

.software-item {
    border-bottom: 1px solid var(--color-border);
}

.software-item:last-child {
    border-bottom: none;
}

.software-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    color: var(--color-text);
    text-decoration: none;
}

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

.error-count {
    font-size: 0.75rem;
    background: var(--color-bg);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

.view-all-link {
    display: block;
    text-align: center;
    padding-top: var(--space-md);
    font-size: 0.875rem;
}

/* Software Grid */
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.software-card {
    display: block;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: box-shadow 0.2s, border-color 0.2s;
    text-decoration: none;
    color: inherit;
}

.software-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.software-card-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.software-card-vendor {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
}

.software-card-meta {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

/* --------------------------------------------------------------------------
   Software Header (Software Page)
   -------------------------------------------------------------------------- */
.software-header {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow-md);
}

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

.software-title-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.software-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-bg-dark);
    margin: 0;
}

.software-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.software-details {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.software-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
}

.software-meta .meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.meta-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.meta-value {
    font-size: 0.9375rem;
    color: var(--color-text);
    font-weight: 500;
}

.platforms {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.platform-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
}

.software-links {
    display: flex;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

/* Stats Card */
.stats-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-lg);
    color: white;
}

.stats-icon {
    font-size: 2.5rem;
}

.stats-content {
    flex: 1;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.stats-label {
    font-size: 0.9375rem;
    opacity: 0.9;
    margin-top: var(--space-xs);
}

.stats-card .btn {
    background: white;
    color: var(--color-primary);
    border-color: white;
}

.stats-card .btn:hover {
    background: var(--color-bg);
    text-decoration: none;
}

/* View All Section */
.view-all-section {
    margin-top: var(--space-xl);
    text-align: center;
}

.view-all-link {
    font-weight: 600;
    color: var(--color-primary);
}

.view-all-link:hover {
    text-decoration: underline;
}

/* Total count label */
.total-count {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-left: auto;
}

/* Error Search Box */
.error-search-box {
    position: relative;
    margin-bottom: var(--space-lg);
}

.error-search-input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-right: 3rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: white;
    transition: border-color 0.2s;
}

.error-search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

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

.error-search-icon {
    position: absolute;
    right: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    color: var(--color-text-muted);
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Error List (Software Page)
   -------------------------------------------------------------------------- */
.error-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.error-card {
    display: block;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: box-shadow 0.2s, border-color 0.2s;
    text-decoration: none;
    color: inherit;
}

.error-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.error-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.error-code {
    font-family: var(--font-mono);
    font-weight: 600;
    background: var(--color-bg);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.error-card-message {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    background: var(--color-bg);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    line-height: 1.5;
}

.error-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.error-card-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Severity Badges */
.severity-critical {
    background: #fef2f2;
    color: #991b1b;
}

.severity-error {
    background: #fef2f2;
    color: var(--color-error);
}

.severity-warning {
    background: #fffbeb;
    color: #92400e;
}

.severity-info {
    background: #eff6ff;
    color: var(--color-info);
}

/* Inline Code & SQL Highlighting */
.inline-code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-bg-dark-secondary);
    color: #e2e8f0;
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-sm);
}

.sql-keyword {
    color: var(--color-primary);
    font-weight: 600;
}

/* Related Errors Grid (Main Content) */
.related-errors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-md);
}

.related-error-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.related-error-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.related-error-code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    background: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    width: fit-content;
}

.related-error-title {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.4;
}

.related-error-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.related-error-desc {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.badge-small {
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
}

/* Sidebar Related Errors Enhancement */
.related-severity {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-left: auto;
}

.related-severity.badge-critical {
    background: var(--color-error);
}

.related-severity.badge-error {
    background: var(--color-warning);
}

.related-severity.badge-warning {
    background: #eab308;
}

.related-severity.badge-info {
    background: var(--color-info);
}

.sidebar-more {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-align: center;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-sm);
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination-info {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
    padding: var(--space-lg) 0;
}

.pagination-btn {
    padding: var(--space-sm) var(--space-lg);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.2s;
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination-btn:disabled,
.pagination-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

a.pagination-btn {
    text-decoration: none;
}

.pagination-pages {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.pagination-page {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.pagination-page:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    text-decoration: none;
}

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

.pagination-ellipsis {
    padding: 0 var(--space-sm);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   FAQ Section
   -------------------------------------------------------------------------- */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--space-md);
    background: white;
    border: none;
    text-align: left;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9375rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question:hover {
    background: var(--color-bg);
}

.faq-icon {
    transition: transform 0.2s;
}

.faq-item.expanded .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 var(--space-md) var(--space-md);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.faq-item.expanded .faq-answer {
    display: block;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Filter Bar
   -------------------------------------------------------------------------- */
.filter-bar {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.filter-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.filter-select {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   404 Error Page
   -------------------------------------------------------------------------- */
.error-page {
    text-align: center;
    padding: var(--space-2xl) 0;
}

.error-page-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-text-muted);
}

.error-page-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.error-page-message {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.error-page-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

/* --------------------------------------------------------------------------
   Footer - V2
   -------------------------------------------------------------------------- */
.footer {
    background: var(--color-bg-dark);
    color: var(--color-text-muted);
    padding: var(--space-xl) 0;
    margin-top: auto;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
}

.footer a {
    color: var(--color-text-muted);
}

.footer a:hover {
    color: white;
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

/* Static Page Content */
.static-content {
    max-width: 800px;
    line-height: 1.8;
    color: var(--color-text);
}

.static-content h2 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    font-size: 1.5rem;
    color: var(--color-text);
}

.static-content h3 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
    color: var(--color-text);
}

.static-content p {
    margin-bottom: var(--space-md);
}

.static-content ul,
.static-content ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

.static-content li {
    margin-bottom: var(--space-sm);
}

.static-content a {
    color: var(--color-primary);
}

.static-content a:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    .two-column {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        gap: 0;
    }

    .nav-link {
        padding: 0.4rem 0.5rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 600px) {
    .header-inner {
        flex-wrap: wrap;
        gap: var(--space-md);
    }

    .nav-menu {
        width: 100%;
        order: 3;
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-xs);
    }

    .nav-link {
        padding: 0.35rem 0.5rem;
        font-size: 0.75rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-search {
        flex-direction: column;
    }

    .error-meta {
        flex-direction: column;
        gap: 0.75rem;
    }

    .filter-bar {
        flex-direction: column;
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    /* Software page responsive */
    .software-title {
        font-size: 1.5rem;
    }

    .software-details {
        flex-direction: column;
    }

    .software-meta {
        gap: var(--space-md);
    }

    .software-links {
        width: 100%;
    }

    .software-links .btn {
        flex: 1;
        text-align: center;
    }

    /* Pagination responsive */
    .pagination {
        flex-wrap: wrap;
    }

    .pagination-pages {
        order: -1;
        width: 100%;
        justify-content: center;
        margin-bottom: var(--space-sm);
    }

    .pagination-btn {
        flex: 1;
    }
}

/* --------------------------------------------------------------------------
   Solutions Section
   -------------------------------------------------------------------------- */
.solutions-section {
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
    border: 1px solid #bbf7d0;
}

.solution-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
}

.solution-card:last-child {
    margin-bottom: 0;
}

.solution-header {
    margin-bottom: var(--space-md);
}

.solution-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--space-sm) 0;
    display: block;
}

.solution-title .badge {
    margin-left: var(--space-sm);
    vertical-align: middle;
}

.solution-summary {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin: 0;
    display: block;
}

/* Difficulty Badges */
.badge-difficulty-easy {
    background: #dcfce7;
    color: #166534;
}

.badge-difficulty-medium {
    background: #fef3c7;
    color: #92400e;
}

.badge-difficulty-advanced {
    background: #fee2e2;
    color: #991b1b;
}

/* Solution Steps */
.solution-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.solution-step {
    display: flex;
    gap: var(--space-md);
}

.step-number {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
}

.step-content {
    flex: 1;
    min-width: 0;
}

.step-instruction {
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    line-height: 1.6;
}

.step-content .code-block {
    margin-top: var(--space-sm);
}

.step-content .code-block pre {
    max-height: 300px;
    overflow: auto;
}

/* Responsive */
@media (max-width: 640px) {
    .solution-step {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .step-number {
        width: 24px;
        height: 24px;
        font-size: 0.8rem;
    }
}

/* --------------------------------------------------------------------------
   Solutions Coming Soon
   -------------------------------------------------------------------------- */
.solutions-coming-soon {
    background: linear-gradient(135deg, #fefce8 0%, #fef9c3 100%);
    border: 1px solid #fde047;
}

.badge-coming-soon {
    background: #fef08a;
    color: #854d0e;
    font-weight: 600;
}

.coming-soon-message {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-left: 4px solid #f59e0b;
}

.coming-soon-message p {
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.6;
}

.generic-tips {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.generic-tips h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.tips-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.tips-list li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.tips-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 600;
}

.tips-list li:last-child {
    margin-bottom: 0;
}

.community-links {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.community-links h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.community-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.community-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.community-btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.community-btn.stackoverflow {
    background: #f48024;
    color: white;
}

.community-btn.stackoverflow:hover {
    background: #da6c0f;
}

.community-btn.google {
    background: #4285f4;
    color: white;
}

.community-btn.google:hover {
    background: #3367d6;
}

.community-btn.docs {
    background: var(--color-bg-dark);
    color: var(--color-text-light);
}

.community-btn.docs:hover {
    background: var(--color-bg-dark-secondary);
}