/**
 * SEO System Stylesheet
 * Dedicated styles for SEO landing pages and blog content
 * This file is isolated to NOT affect main website styling
 * 
 * Version: 1.0.0
 * Author: tanjirul.com
 */

/* ========================================
   CSS VARIABLES - Theme System
   ======================================== */

:root {
    /* Colors - Dark Theme (Default) */
    --seo-bg-primary: #0a0e17;
    --seo-bg-secondary: #111827;
    --seo-bg-card: rgba(17, 24, 39, 0.7);
    --seo-bg-glass: rgba(255, 255, 255, 0.05);
    
    --seo-text-primary: #f9fafb;
    --seo-text-secondary: #9ca3af;
    --seo-text-muted: #6b7280;
    
    --seo-accent-primary: #6366f1;
    --seo-accent-secondary: #8b5cf6;
    --seo-accent-tertiary: #06b6d4;
    --seo-accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    
    --seo-success: #10b981;
    --seo-warning: #f59e0b;
    --seo-error: #ef4444;
    
    --seo-border-color: rgba(255, 255, 255, 0.1);
    --seo-border-light: rgba(255, 255, 255, 0.05);
    
    /* Shadows */
    --seo-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --seo-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --seo-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --seo-shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Spacing */
    --seo-spacing-xs: 0.25rem;
    --seo-spacing-sm: 0.5rem;
    --seo-spacing-md: 1rem;
    --seo-spacing-lg: 1.5rem;
    --seo-spacing-xl: 2rem;
    --seo-spacing-2xl: 3rem;
    --seo-spacing-3xl: 4rem;
    
    /* Border Radius */
    --seo-radius-sm: 0.375rem;
    --seo-radius-md: 0.5rem;
    --seo-radius-lg: 1rem;
    --seo-radius-xl: 1.5rem;
    --seo-radius-full: 9999px;
    
    /* Transitions */
    --seo-transition-fast: 150ms ease;
    --seo-transition-normal: 250ms ease;
    --seo-transition-slow: 350ms ease;
    
    /* Z-Index */
    --seo-z-dropdown: 100;
    --seo-z-sticky: 200;
    --seo-z-modal: 300;
    --seo-z-tooltip: 400;
}

/* Light Theme Variables */
[data-theme="light"] {
    --seo-bg-primary: #f9fafb;
    --seo-bg-secondary: #ffffff;
    --seo-bg-card: rgba(255, 255, 255, 0.8);
    --seo-bg-glass: rgba(255, 255, 255, 0.9);
    
    --seo-text-primary: #111827;
    --seo-text-secondary: #4b5563;
    --seo-text-muted: #9ca3af;
    
    --seo-border-color: rgba(0, 0, 0, 0.1);
    --seo-border-light: rgba(0, 0, 0, 0.05);
    
    --seo-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --seo-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --seo-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
    --seo-shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

/* ========================================
   BASE STYLES
   ======================================== */

.seo-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--seo-spacing-lg);
}

.seo-section {
    padding: var(--seo-spacing-3xl) 0;
    position: relative;
}

.seo-text-center {
    text-align: center;
}

.seo-text-left {
    text-align: left;
}

.seo-text-right {
    text-align: right;
}

/* ========================================
   GRADIENT BACKGROUNDS
   ======================================== */

.seo-gradient-bg {
    background: var(--seo-accent-gradient);
    position: relative;
    overflow: hidden;
}

.seo-gradient-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.seo-gradient-text {
    background: var(--seo-accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.seo-hero-gradient {
    background: linear-gradient(180deg, var(--seo-bg-primary) 0%, var(--seo-bg-secondary) 100%);
    position: relative;
}

.seo-hero-gradient::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    background: linear-gradient(to top, var(--seo-bg-primary), transparent);
    pointer-events: none;
}

.seo-radial-gradient {
    background: radial-gradient(ellipse at center, var(--seo-bg-secondary) 0%, var(--seo-bg-primary) 100%);
}

/* Animated Gradient */
.seo-animated-gradient {
    background: linear-gradient(-45deg, #6366f1, #8b5cf6, #06b6d4, #6366f1);
    background-size: 400% 400%;
    animation: seoGradientShift 15s ease infinite;
}

@keyframes seoGradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ========================================
   GLASSMORPHISM CARDS
   ======================================== */

.seo-glass-card {
    background: var(--seo-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--seo-border-color);
    border-radius: var(--seo-radius-lg);
    padding: var(--seo-spacing-xl);
    transition: all var(--seo-transition-normal);
}

.seo-glass-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--seo-accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--seo-shadow-glow);
}

.seo-glass-card-static {
    background: var(--seo-bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--seo-border-light);
    border-radius: var(--seo-radius-lg);
    padding: var(--seo-spacing-xl);
}

.seo-card {
    background: var(--seo-bg-secondary);
    border: 1px solid var(--seo-border-light);
    border-radius: var(--seo-radius-lg);
    padding: var(--seo-spacing-xl);
    transition: all var(--seo-transition-normal);
}

.seo-card-hover {
    cursor: pointer;
}

.seo-card-hover:hover {
    transform: translateY(-8px);
    box-shadow: var(--seo-shadow-lg);
    border-color: var(--seo-accent-primary);
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

.seo-heading-1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--seo-spacing-lg);
    color: var(--seo-text-primary);
}

.seo-heading-2 {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--seo-spacing-md);
    color: var(--seo-text-primary);
}

.seo-heading-3 {
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--seo-spacing-md);
    color: var(--seo-text-primary);
}

.seo-heading-4 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--seo-spacing-sm);
    color: var(--seo-text-primary);
}

.seo-paragraph {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--seo-text-secondary);
    margin-bottom: var(--seo-spacing-md);
}

.seo-paragraph-lg {
    font-size: 1.25rem;
    line-height: 1.8;
}

.seo-text-sm {
    font-size: 0.875rem;
}

.seo-text-xs {
    font-size: 0.75rem;
}

.seo-font-bold {
    font-weight: 700;
}

.seo-font-semibold {
    font-weight: 600;
}

.seo-font-medium {
    font-weight: 500;
}

/* ========================================
   BUTTONS & INTERACTIONS
   ======================================== */

.seo-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--seo-spacing-sm);
    padding: var(--seo-spacing-md) var(--seo-spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--seo-radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--seo-transition-normal);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

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

.seo-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--seo-shadow-glow);
}

.seo-btn-secondary {
    background: transparent;
    color: var(--seo-text-primary);
    border: 2px solid var(--seo-accent-primary);
}

.seo-btn-secondary:hover {
    background: var(--seo-accent-primary);
    color: white;
}

.seo-btn-glow {
    position: relative;
}

.seo-btn-glow::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--seo-accent-gradient);
    border-radius: var(--seo-radius-md);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--seo-transition-normal);
    filter: blur(8px);
}

.seo-btn-glow:hover::after {
    opacity: 0.5;
}

/* Button Sizes */
.seo-btn-sm {
    padding: var(--seo-spacing-sm) var(--seo-spacing-md);
    font-size: 0.875rem;
}

.seo-btn-lg {
    padding: var(--seo-spacing-lg) var(--seo-spacing-2xl);
    font-size: 1.125rem;
}

/* ========================================
   HOVER ANIMATIONS
   ======================================== */

.seo-hover-lift {
    transition: transform var(--seo-transition-normal), box-shadow var(--seo-transition-normal);
}

.seo-hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--seo-shadow-lg);
}

.seo-hover-scale {
    transition: transform var(--seo-transition-fast);
}

.seo-hover-scale:hover {
    transform: scale(1.05);
}

.seo-hover-brightness {
    transition: filter var(--seo-transition-fast);
}

.seo-hover-brightness:hover {
    filter: brightness(1.1);
}

.seo-hover-glow {
    transition: box-shadow var(--seo-transition-normal);
}

.seo-hover-glow:hover {
    box-shadow: var(--seo-shadow-glow);
}

.seo-hover-border {
    transition: border-color var(--seo-transition-fast);
}

.seo-hover-border:hover {
    border-color: var(--seo-accent-primary);
}

/* Icon Hover Effects */
.seo-icon-hover {
    transition: all var(--seo-transition-normal);
}

.seo-icon-hover:hover {
    color: var(--seo-accent-primary);
    transform: translateY(-4px);
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */

.seo-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--seo-transition-slow), transform var(--seo-transition-slow);
}

.seo-fade-in.seo-visible {
    opacity: 1;
    transform: translateY(0);
}

.seo-fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--seo-transition-slow) 0.1s, transform var(--seo-transition-slow) 0.1s;
}

.seo-fade-in-up.seo-visible {
    opacity: 1;
    transform: translateY(0);
}

.seo-fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity var(--seo-transition-slow), transform var(--seo-transition-slow);
}

.seo-fade-in-left.seo-visible {
    opacity: 1;
    transform: translateX(0);
}

.seo-fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity var(--seo-transition-slow), transform var(--seo-transition-slow);
}

.seo-fade-in-right.seo-visible {
    opacity: 1;
    transform: translateX(0);
}

.seo-zoom-in {
    opacity: 0;
    transform: scale(0.8);
    transition: opacity var(--seo-transition-slow), transform var(--seo-transition-slow);
}

.seo-zoom-in.seo-visible {
    opacity: 1;
    transform: scale(1);
}

/* Staggered Animation Delays */
.seo-delay-1 { transition-delay: 100ms; }
.seo-delay-2 { transition-delay: 200ms; }
.seo-delay-3 { transition-delay: 300ms; }
.seo-delay-4 { transition-delay: 400ms; }
.seo-delay-5 { transition-delay: 500ms; }

/* ========================================
   COUNTER ANIMATIONS
   ======================================== */

.seo-counter {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

.seo-counter-animate {
    transition: counter-increment var(--seo-transition-slow);
}

/* ========================================
   LAZY LOADING
   ======================================== */

.seo-lazy-load {
    opacity: 0;
    transition: opacity var(--seo-transition-normal);
}

.seo-lazy-load.seo-loaded {
    opacity: 1;
}

.seo-lazy-image {
    background: var(--seo-bg-secondary);
    min-height: 200px;
    position: relative;
    overflow: hidden;
}

.seo-lazy-image img {
    opacity: 0;
    transition: opacity var(--seo-transition-normal);
}

.seo-lazy-image img.seo-loaded {
    opacity: 1;
}

/* Skeleton Loading */
.seo-skeleton {
    background: linear-gradient(90deg, var(--seo-bg-secondary) 25%, var(--seo-bg-card) 50%, var(--seo-bg-secondary) 75%);
    background-size: 200% 100%;
    animation: seoSkeleton 1.5s ease-in-out infinite;
}

@keyframes seoSkeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

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

/* Mobile First - Base styles are for mobile */

/* Small Devices (Tablets) */
@media (min-width: 640px) {
    .seo-heading-1 {
        font-size: 4rem;
    }
    
    .seo-heading-2 {
        font-size: 2.75rem;
    }
    
    .seo-container {
        padding: 0 var(--seo-spacing-xl);
    }
}

/* Medium Devices (Laptops) */
@media (min-width: 768px) {
    .seo-heading-1 {
        font-size: 4.5rem;
    }
    
    .seo-heading-2 {
        font-size: 3rem;
    }
    
    .seo-grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .seo-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Large Devices (Desktops) */
@media (min-width: 1024px) {
    .seo-heading-1 {
        font-size: 5rem;
    }
    
    .seo-grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .seo-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Extra Large Devices */
@media (min-width: 1280px) {
    .seo-grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ========================================
   GRID & FLEX UTILITIES
   ======================================== */

.seo-grid {
    display: grid;
    gap: var(--seo-spacing-lg);
}

.seo-grid-2 {
    grid-template-columns: 1fr;
}

.seo-grid-3 {
    grid-template-columns: 1fr;
}

.seo-grid-4 {
    grid-template-columns: 1fr;
}

.seo-flex {
    display: flex;
}

.seo-flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.seo-flex-col {
    flex-direction: column;
}

.seo-flex-wrap {
    flex-wrap: wrap;
}

.seo-gap-sm {
    gap: var(--seo-spacing-sm);
}

.seo-gap-md {
    gap: var(--seo-spacing-md);
}

.seo-gap-lg {
    gap: var(--seo-spacing-lg);
}

.seo-gap-xl {
    gap: var(--seo-spacing-xl);
}

/* ========================================
   SPACING UTILITIES
   ======================================== */

.seo-m-auto { margin: auto; }
.seo-m-0 { margin: 0; }
.seo-mt-0 { margin-top: 0; }
.seo-mt-sm { margin-top: var(--seo-spacing-sm); }
.seo-mt-md { margin-top: var(--seo-spacing-md); }
.seo-mt-lg { margin-top: var(--seo-spacing-lg); }
.seo-mt-xl { margin-top: var(--seo-spacing-xl); }
.seo-mt-2xl { margin-top: var(--seo-spacing-2xl); }

.seo-mb-0 { margin-bottom: 0; }
.seo-mb-sm { margin-bottom: var(--seo-spacing-sm); }
.seo-mb-md { margin-bottom: var(--seo-spacing-md); }
.seo-mb-lg { margin-bottom: var(--seo-spacing-lg); }
.seo-mb-xl { margin-bottom: var(--seo-spacing-xl); }
.seo-mb-2xl { margin-bottom: var(--seo-spacing-2xl); }

.seo-p-0 { padding: 0; }
.seo-p-sm { padding: var(--seo-spacing-sm); }
.seo-p-md { padding: var(--seo-spacing-md); }
.seo-p-lg { padding: var(--seo-spacing-lg); }
.seo-p-xl { padding: var(--seo-spacing-xl); }
.seo-p-2xl { padding: var(--seo-spacing-2xl); }

/* ========================================
   VISIBILITY & DISPLAY
   ======================================== */

.seo-hidden { display: none; }
.seo-block { display: block; }
.seo-inline { display: inline; }
.seo-inline-block { display: inline-block; }

.seo-visible { visibility: visible; }
.seo-invisible { visibility: hidden; }

.seo-overflow-hidden { overflow: hidden; }
.seo-overflow-auto { overflow: auto; }

/* ========================================
   BORDER & SHADOW UTILITIES
   ======================================== */

.seo-border {
    border: 1px solid var(--seo-border-color);
}

.seo-border-top {
    border-top: 1px solid var(--seo-border-color);
}

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

.seo-rounded { border-radius: var(--seo-radius-md); }
.seo-rounded-lg { border-radius: var(--seo-radius-lg); }
.seo-rounded-xl { border-radius: var(--seo-radius-xl); }
.seo-rounded-full { border-radius: var(--seo-radius-full); }

.seo-shadow-sm { box-shadow: var(--seo-shadow-sm); }
.seo-shadow-md { box-shadow: var(--seo-shadow-md); }
.seo-shadow-lg { box-shadow: var(--seo-shadow-lg); }
.seo-shadow-glow { box-shadow: var(--seo-shadow-glow); }

/* ========================================
   SEO SPECIFIC COMPONENTS
   ======================================== */

/* Hero Section */
.seo-hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--seo-spacing-3xl) 0;
}

.seo-hero-content {
    max-width: 800px;
    text-align: center;
    z-index: 1;
}

/* Feature Cards */
.seo-feature {
    padding: var(--seo-spacing-xl);
    border-radius: var(--seo-radius-lg);
    background: var(--seo-bg-card);
    border: 1px solid var(--seo-border-light);
    transition: all var(--seo-transition-normal);
}

.seo-feature:hover {
    border-color: var(--seo-accent-primary);
    transform: translateY(-4px);
}

.seo-feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--seo-radius-md);
    background: var(--seo-accent-gradient);
    margin-bottom: var(--seo-spacing-md);
    font-size: 1.5rem;
    color: white;
}

/* Pricing Cards */
.seo-pricing-card {
    background: var(--seo-bg-card);
    border: 1px solid var(--seo-border-light);
    border-radius: var(--seo-radius-xl);
    padding: var(--seo-spacing-xl);
    text-align: center;
    transition: all var(--seo-transition-normal);
}

.seo-pricing-card.featured {
    border-color: var(--seo-accent-primary);
    transform: scale(1.05);
}

.seo-pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--seo-shadow-lg);
}

/* Testimonial Cards */
.seo-testimonial {
    background: var(--seo-bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--seo-border-light);
    border-radius: var(--seo-radius-lg);
    padding: var(--seo-spacing-xl);
}

/* Stats Section */
.seo-stat {
    text-align: center;
    padding: var(--seo-spacing-lg);
}

.seo-stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--seo-accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.seo-stat-label {
    font-size: 1rem;
    color: var(--seo-text-secondary);
    margin-top: var(--seo-spacing-sm);
}

/* FAQ Section */
.seo-faq-item {
    background: var(--seo-bg-card);
    border: 1px solid var(--seo-border-light);
    border-radius: var(--seo-radius-md);
    padding: var(--seo-spacing-lg);
    margin-bottom: var(--seo-spacing-md);
    cursor: pointer;
    transition: all var(--seo-transition-fast);
}

.seo-faq-item:hover {
    border-color: var(--seo-accent-primary);
}

.seo-faq-question {
    font-weight: 600;
    color: var(--seo-text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.seo-faq-answer {
    color: var(--seo-text-secondary);
    margin-top: var(--seo-spacing-md);
    display: none;
}

.seo-faq-item.active .seo-faq-answer {
    display: block;
}

/* Blog Post Cards */
.seo-blog-card {
    background: var(--seo-bg-secondary);
    border: 1px solid var(--seo-border-light);
    border-radius: var(--seo-radius-lg);
    overflow: hidden;
    transition: all var(--seo-transition-normal);
}

.seo-blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--seo-shadow-lg);
}

.seo-blog-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--seo-bg-card);
}

.seo-blog-content {
    padding: var(--seo-spacing-lg);
}

.seo-blog-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--seo-text-primary);
    margin-bottom: var(--seo-spacing-sm);
}

.seo-blog-excerpt {
    color: var(--seo-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.seo-blog-meta {
    font-size: 0.75rem;
    color: var(--seo-text-muted);
    margin-top: var(--seo-spacing-md);
}

/* CTA Section */
.seo-cta {
    background: var(--seo-accent-gradient);
    padding: var(--seo-spacing-3xl);
    border-radius: var(--seo-radius-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.seo-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>');
    background-size: 200px;
    opacity: 0.5;
}

/* ========================================
   DARK/LIGHT THEME TOGGLE
   ======================================== */

.seo-theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: var(--seo-radius-full);
    background: var(--seo-accent-gradient);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    box-shadow: var(--seo-shadow-lg);
    z-index: 1000;
    transition: all var(--seo-transition-normal);
}

.seo-theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--seo-shadow-glow);
}

/* ========================================
   PERFORMANCE OPTIMIZATION
   ======================================== */

/* Will-change for animations */
.seo-animate {
    will-change: transform, opacity;
}

/* GPU acceleration */
.seo-gpu {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print styles */
@media print {
    .seo-fade-in,
    .seo-fade-in-up,
    .seo-fade-in-left,
    .seo-fade-in-right,
    .seo-zoom-in {
        opacity: 1;
        transform: none;
    }
}