/* Rudraksh Advertising - Main Stylesheet
 * Version: 1.0.0
 * Description: Comprehensive styles for Rudraksh Advertising website
 * Author: AI Assistant
 * Date: 2025
 */

/* ==========================================================================
   CSS Custom Properties & Variables
   ========================================================================== */
:root {
    --primary-color: #3b82f6;
    --primary-dark: #1e3a8a;
    --primary-light: #dbeafe;
    --secondary-color: #f8fafc;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --focus-ring: #3b82f6;
    --focus-ring-offset: 2px;
    --focus-ring-width: 3px;
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
}

/* ==========================================================================
   High Contrast Mode Support
   ========================================================================== */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --primary-dark: #000000;
        --text-primary: #000000;
        --text-secondary: #000000;
    }
}

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

/* ==========================================================================
   High Contrast Mode Styles
   ========================================================================== */
.high-contrast {
    --primary-color: #000000;
    --primary-dark: #000000;
    --text-primary: #000000;
    --text-secondary: #000000;
    --focus-ring: #ffffff;
    background: #ffffff !important;
    color: #000000 !important;
}

.high-contrast * {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #000000 !important;
}

.high-contrast .hero-gradient {
    background: #000000 !important;
    color: #ffffff !important;
}

.high-contrast .text-blue-300 {
    color: #ffffff !important;
}

.high-contrast .text-blue-100 {
    color: #ffffff !important;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
body {
    font-family: 'Poppins', sans-serif;
    overflow-x: hidden;
    background: linear-gradient(180deg, var(--secondary-color) 0%, #e2e8f0 100%);
    line-height: 1.6;
    color: var(--text-primary);
}

.hero-gradient {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
}

/* ==========================================================================
   Enhanced Focus Styles for Accessibility
   ========================================================================== */
.focus-visible:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
    border-radius: var(--border-radius);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
a:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
    border-radius: var(--border-radius);
}

/* ==========================================================================
   Skip Link & Screen Reader Styles
   ========================================================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sr-only:focus {
    position: static;
    width: auto;
    height: auto;
    padding: 0.5rem 1rem;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    z-index: 9999;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ==========================================================================
   Enhanced Button Accessibility
   ========================================================================== */
.btn-accessible {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all var(--transition-medium);
    cursor: pointer;
    border: none;
    text-decoration: none;
    min-height: 44px; /* Minimum touch target size */
    min-width: 44px;
}

.btn-accessible:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
}

.btn-accessible:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-accessible:active {
    transform: translateY(0);
}

/* ==========================================================================
   Service Card Styles
   ========================================================================== */
.service-card {
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
    border: 1px solid #e2e8f0;
    will-change: transform;
    transform: translateZ(0);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), background var(--transition-medium);
}

.service-card:hover {
    transform: translateY(-10px) translateZ(0);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.service-card:focus-within {
    outline: 2px solid var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
}

/* ==========================================================================
   Client Logo Styles
   ========================================================================== */
.client-logo:hover {
    filter: grayscale(0);
    transform: scale(1.1);
}

/* ==========================================================================
   Navigation Link Styles
   ========================================================================== */
.nav-link {
    position: relative;
}

.nav-link:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background-color: #3b82f6;
    transition: width 0.3s ease;
}

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

/* ==========================================================================
   Animation Classes
   ========================================================================== */
.animate-fade-in {
    animation: fadeIn 1s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Section Background Styles
   ========================================================================== */
.stats-section {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

.testimonials-section {
    background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
}

.contact-section {
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
}

.footer-section {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

.about-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.services-section {
    background: linear-gradient(180deg, #f1f5f9 0%, #e2e8f0 100%);
}

/* ==========================================================================
   Collapsible Animation
   ========================================================================== */
.collapsible {
    overflow: hidden;
    height: 0;
    opacity: 0;
    transition: height 400ms ease, opacity 300ms ease;
}

.collapsible.is-open {
    opacity: 1;
}

/* ==========================================================================
   Marquee Animation
   ========================================================================== */
.marquee {
    animation: marquee 30s linear infinite;
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.text-primary {
    color: #2563eb;
}

.bg-primary {
    background-color: #2563eb;
}

.font-heading {
    font-family: 'Poppins', sans-serif;
}

.portfolio-tab.active {
    background-color: #2563eb;
    color: #ffffff;
}

/* ==========================================================================
   View More Button Styles
   ========================================================================== */
.view-more-btn {
    background: linear-gradient(135deg, #3b82f6, #1e40af);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.view-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.view-more-btn:active {
    transform: translateY(0);
}

/* ==========================================================================
   Portfolio Item Styles
   ========================================================================== */
.portfolio-item {
    display: flex;
    flex-direction: column;
    height: 100%;
    will-change: transform;
    transform: translateZ(0);
    transition: transform var(--transition-medium), background var(--transition-medium);
    border-radius: 0.75rem;
    overflow: hidden;
}

.portfolio-item img {
    display: block;
    width: 100%;
    height: 12rem;
    object-fit: cover;
    transition: transform var(--transition-medium);
}

.portfolio-item:hover img {
    transform: scale(1.05);
}

.portfolio-item .p-6 {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
}

.portfolio-item:hover {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    transform: translateY(-5px) translateZ(0);
}

.portfolio-item:focus-within {
    outline: 2px solid var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
}

/* ==========================================================================
   Services List Styles
   ========================================================================== */
.services-list .service-card {
    display: block;
    padding: 0.5rem 0.75rem;
    box-shadow: none;
}

.services-list .service-card .p-6 {
    padding: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.services-list {
    gap: 0.5rem;
}

.services-list .service-card .mb-4 {
    margin-bottom: 0;
}

.services-list .service-card .h-16.w-16 {
    height: 1.25rem;
    width: 1.25rem;
}

.services-list .service-card i {
    font-size: 0.8rem;
}

.services-list .service-card h3 {
    margin: 0;
    font-size: 0.9rem;
}

.services-list .service-card p {
    display: none !important;
}

.services-list .service-card:hover {
    transform: translateY(0);
}

/* ==========================================================================
   Responsive Contact Form Styles
   ========================================================================== */
@media (max-width: 768px) {
    .contact-section {
        padding: 2rem 1rem;
    }
    
    .contact-section .grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-section .bg-gray-50 {
        padding: 1.5rem;
        margin: 0 -0.5rem;
    }
    
    .contact-section input[type="email"],
    .contact-section input[type="text"],
    .contact-section input[type="tel"],
    .contact-section textarea {
        font-size: 16px;
        padding: 0.875rem 1rem;
        min-height: 3rem;
    }
    
    .contact-section label {
        font-size: 0.875rem;
        margin-bottom: 0.5rem;
    }
    
    .contact-section .mb-6 {
        margin-bottom: 1.5rem;
    }
    
    .contact-section button[type="submit"] {
        padding: 1rem;
        font-size: 1rem;
        min-height: 3.5rem;
    }
}

@media (max-width: 480px) {
    .contact-section {
        padding: 1.5rem 0.75rem;
    }
    
    .contact-section .bg-gray-50 {
        padding: 1rem;
        border-radius: 0.75rem;
    }
    
    .contact-section h3 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .contact-section input[type="email"],
    .contact-section input[type="text"],
    .contact-section input[type="tel"],
    .contact-section textarea {
        padding: 0.75rem;
        font-size: 16px;
    }
}

/* ==========================================================================
   Enhanced Form Field Focus States
   ========================================================================== */
.contact-section input:focus,
.contact-section textarea:focus {
    box-shadow: 0 0 0 var(--focus-ring-width) rgba(59, 130, 246, 0.1);
    border-color: var(--primary-color);
    outline: none;
}

.contact-section input[type="email"] {
    word-break: break-all;
    overflow-wrap: break-word;
    min-width: 0;
    width: 100%;
}

/* ==========================================================================
   Performance Optimizations
   ========================================================================== */
.performance-optimized {
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.critical-path {
    contain: layout style paint;
}

.animate-optimized {
    will-change: transform, opacity;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* ==========================================================================
   Image Optimizations
   ========================================================================== */
img {
    max-width: 100%;
    height: auto;
}

.portfolio-item img {
    aspect-ratio: 4/3;
    object-fit: cover;
}

.font-optimized {
    font-display: swap;
}

/* ==========================================================================
   Lazy Loading Styles
   ========================================================================== */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

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

/* ==========================================================================
   Animation Optimizations
   ========================================================================== */
.animate-smooth {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.paint-optimized {
    transform: translateZ(0);
    backface-visibility: hidden;
}

.scroll-optimized {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

.critical-content {
    contain: layout style paint;
}

/* ==========================================================================
   Reduced Motion Support for Animations
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    .animate-optimized {
        animation: none !important;
        transition: none !important;
    }
    
    .marquee {
        animation: none !important;
    }
    
    .service-card:hover {
        transform: none !important;
    }
    
    .portfolio-item:hover {
        transform: none !important;
    }
}

/* ==========================================================================
   Print Optimization
   ========================================================================== */
@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .no-print {
        display: none !important;
    }
    
    .print-optimized {
        color: black !important;
        background: white !important;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
    }
    
    .hero-gradient {
        background: white !important;
        color: black !important;
    }
}

/* ==========================================================================
   Enhanced Responsive Design
   ========================================================================== */
@media (max-width: 640px) {
    .contact-section input[type="email"] {
        font-size: 16px !important;
        padding: 0.75rem;
        line-height: 1.5;
    }
    
    .contact-section .bg-gray-50 {
        margin: 0;
        border-radius: var(--border-radius);
    }
}

@media (max-width: 480px) {
    .container-mobile {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .text-mobile {
        font-size: 0.875rem;
        line-height: 1.5;
    }
}

@media (min-width: 768px) and (max-width: 1024px) {
    .tablet-optimized {
        padding: 2rem;
    }
}

/* ==========================================================================
   High DPI Display Optimizations
   ========================================================================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .high-dpi {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* ==========================================================================
   Dark Mode Support
   ========================================================================== */
@media (prefers-color-scheme: dark) {
    .dark-mode-support {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --secondary-color: #1f2937;
        background: #111827;
        color: #f9fafb;
    }
}

/* ==========================================================================
   Loading Overlay Styles
   ========================================================================== */
#loading-overlay {
    position: fixed;
    inset: 0;
    background: white;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

/* ==========================================================================
   Critical CSS for Above-the-Fold Content
   ========================================================================== */
.critical-content {
    contain: layout style paint;
}

/* ==========================================================================
   Focus Management Styles
   ========================================================================== */
.focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
    border-radius: var(--border-radius);
}

/* ==========================================================================
   Field Error Styles
   ========================================================================== */
.field-error {
    color: #dc2626;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ==========================================================================
   Loading Animation
   ========================================================================== */
.animate-spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}