/* 
 * Ayurveda Responsive & Retina Optimized Styles
 * Version: 2.0
 * Description: Enhanced responsive design for Ayurvedic healthcare website
 */

/* CSS Custom Properties for Consistent Theming */
:root {
    --ayurveda-primary: #2c5f2d;
    --ayurveda-secondary: #4a7c59;
    --ayurveda-sage: #9bc370;
    --ayurveda-gold: #d4af37;
    --ayurveda-cream: #f8f6f0;
    --ayurveda-deep-green: #1a4d1e;
    
    /* Typography Scale */
    --font-size-xs: clamp(0.75rem, 1.5vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 1.8vw, 1rem);
    --font-size-base: clamp(1rem, 2vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 2.5vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 3vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 4vw, 2rem);
    --font-size-3xl: clamp(2rem, 5vw, 3rem);
    
    /* Spacing Scale */
    --spacing-xs: clamp(0.25rem, 1vw, 0.5rem);
    --spacing-sm: clamp(0.5rem, 2vw, 1rem);
    --spacing-md: clamp(1rem, 3vw, 1.5rem);
    --spacing-lg: clamp(1.5rem, 4vw, 2rem);
    --spacing-xl: clamp(2rem, 5vw, 3rem);
    --spacing-2xl: clamp(3rem, 6vw, 4rem);
    
    /* Border Radius Scale */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadow System */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Base Typography Improvements */
body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Retina Display Optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi), (min-resolution: 2dppx) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    
    .btn, .form-control, .card {
        border-width: 0.5px;
    }
    
    img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Enhanced Button System */
.btn {
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-ayurveda-primary {
    background: linear-gradient(135deg, var(--ayurveda-primary), var(--ayurveda-secondary));
    border-color: var(--ayurveda-primary);
    color: white;
}

.btn-ayurveda-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--ayurveda-deep-green), var(--ayurveda-primary));
}

/* Enhanced Form Controls */
.form-control {
    border-radius: var(--radius-md);
    border: 1.5px solid #e2e8f0;
    transition: all 0.3s ease;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
}

.form-control:focus {
    border-color: var(--ayurveda-primary);
    box-shadow: 0 0 0 3px rgba(44, 95, 45, 0.1);
    outline: none;
}

/* Card System */
.card {
    border-radius: var(--radius-xl);
    border: none;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    overflow: hidden;
}

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

.card-modern {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Responsive Grid System Enhancements */
@media (max-width: 1399.98px) {
    .container-fluid {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

@media (max-width: 1199.98px) {
    .container-fluid {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
    
    .display-1 { font-size: 3.5rem; }
    .display-2 { font-size: 3rem; }
    .display-3 { font-size: 2.5rem; }
}

@media (max-width: 991.98px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .display-1 { font-size: 2.5rem; }
    .display-2 { font-size: 2rem; }
    .display-3 { font-size: 1.75rem; }
    
    /* Stack columns on tablet */
    .hero-content-left,
    .hero-content-right {
        text-align: center;
    }
}

@media (max-width: 767.98px) {
    .container-fluid {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }
    
    /* Mobile typography */
    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }
    h3 { font-size: var(--font-size-lg); }
    h4 { font-size: var(--font-size-base); }
    
    /* Mobile button sizing */
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: var(--font-size-base);
    }
    
    /* Mobile card adjustments */
    .card {
        border-radius: var(--radius-lg);
        margin-bottom: 1rem;
    }
}

@media (max-width: 575.98px) {
    /* Extra small devices */
    .container-fluid {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }
    
    /* Compact spacing */
    .py-5 { padding-top: 2rem !important; padding-bottom: 2rem !important; }
    .py-4 { padding-top: 1.5rem !important; padding-bottom: 1.5rem !important; }
    
    /* Mobile-first navigation */
    .nav-link {
        padding: 0.5rem 1rem;
        font-size: var(--font-size-sm);
    }
}

/* Section Spacing System */
.section-spacing {
    padding: var(--spacing-2xl) 0;
}

@media (max-width: 768px) {
    .section-spacing {
        padding: var(--spacing-xl) 0;
    }
}

/* Animation Utilities */
.fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
}

.fade-in-left {
    animation: fadeInLeft 0.8s ease-out forwards;
}

.fade-in-right {
    animation: fadeInRight 0.8s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Utility Classes for Common Patterns */
.gradient-primary {
    background: linear-gradient(135deg, var(--ayurveda-primary), var(--ayurveda-secondary));
}

.gradient-sage {
    background: linear-gradient(135deg, var(--ayurveda-sage), var(--ayurveda-secondary));
}

.text-gradient {
    background: linear-gradient(135deg, var(--ayurveda-primary), var(--ayurveda-sage));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.backdrop-blur {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Loading States */
.loading-shimmer {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

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

/* Accessibility Improvements */
.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;
}

/* Focus States */
*:focus-visible {
    outline: 2px solid var(--ayurveda-primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        color: black !important;
        background: white !important;
    }
    
    .btn {
        border: 1px solid black !important;
        color: black !important;
        background: white !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --ayurveda-cream: #1a202c;
    }
    
    .card-modern {
        background: rgba(45, 55, 72, 0.95);
        color: white;
    }
    
    .form-control {
        background-color: #2d3748;
        border-color: #4a5568;
        color: white;
    }
    
    .form-control:focus {
        background-color: #2d3748;
        border-color: var(--ayurveda-sage);
    }
}

/* Performance Optimizations */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Container Queries Support (Future-proofing) */
@supports (container-type: inline-size) {
    .card-container {
        container-type: inline-size;
    }
    
    @container (max-width: 400px) {
        .card-responsive {
            padding: 1rem;
        }
    }
}