/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Premium Color Palette */
    --gray-950: #0a0a0a;
    --gray-900: #171717;
    --gray-800: #262626;
    --gray-700: #404040;
    --gray-600: #525252;
    --gray-500: #737373;
    --gray-400: #a3a3a3;
    --gray-300: #d4d4d4;
    --gray-200: #e5e5e5;
    --gray-100: #f5f5f5;
    --gray-50: #fafafa;
    --white: #ffffff;
    
    /* Single Premium Accent */
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-dark: #1d4ed8;
    
    /* Functional Colors */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    /* Sophisticated Gradients (Static) */
    --gradient-primary: linear-gradient(135deg, var(--gray-950) 0%, var(--gray-900) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    --gradient-subtle: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    
    /* Premium Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-bg-strong: rgba(255, 255, 255, 0.12);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-border-strong: rgba(255, 255, 255, 0.2);
    --glass-shadow-sm: 0 4px 16px 0 rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.15);
    --glass-shadow-lg: 0 16px 64px 0 rgba(0, 0, 0, 0.2);
    --glass-backdrop: blur(16px);
    --glass-backdrop-strong: blur(24px);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    /* Spacing System */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 5rem;
    --spacing-5xl: 6rem;
    
    /* Liquid Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-3xl: 32px;
    --radius-full: 9999px;
    
    /* Premium Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 24px -4px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px -8px rgba(0, 0, 0, 0.2);
    --shadow-2xl: 0 32px 64px -16px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Transitions */
    --transition-fast: 0.2s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

body {
    font-family: var(--font-primary);
    line-height: 1.7;
    letter-spacing: -0.01em;
    color: var(--white);
    background: var(--gradient-primary);
    /* IE11 fallback */
    background: linear-gradient(135deg, #0a0a0a 0%, #171717 100%);
    background: var(--gradient-primary);
    overflow-x: hidden;
    /* Cross-browser user-select */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Premium Background Effects */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--gradient-primary);
    z-index: -2;
}

.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.01) 1px, transparent 1px);
    background-size: 100px 100px;
    z-index: -1;
    opacity: 0.6;
}

/* Premium Navigation */
.nav {
    position: fixed;
    top: var(--spacing-md);
    left: 50%;
    /* Cross-browser transform */
    -webkit-transform: translateX(-50%);
    -moz-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    transform: translateX(-50%);
    width: calc(100% - var(--spacing-xl));
    max-width: 1200px;
    background: var(--glass-bg-strong);
    /* Fallback for IE11 */
    background: rgba(255, 255, 255, 0.12);
    background: var(--glass-bg-strong);
    /* Cross-browser backdrop-filter */
    -webkit-backdrop-filter: var(--glass-backdrop-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    z-index: 1000;
    transition: var(--transition-normal);
    box-shadow: var(--glass-shadow);
}

.nav-container {
    padding: var(--spacing-lg) var(--spacing-xl);
    /* Cross-browser flexbox */
    display: -webkit-box;
    display: -webkit-flex;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    /* Cross-browser flexbox */
    display: -webkit-box;
    display: -webkit-flex;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
    font-size: 1.25rem;
    color: var(--white);
}

.brand-icon {
    font-size: 1.375rem;
    /* Cross-browser filter */
    -webkit-filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.3));
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.3));
}

.nav-links {
    /* Cross-browser flexbox */
    display: -webkit-box;
    display: -webkit-flex;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: var(--spacing-2xl);
}

.nav-link {
    color: var(--gray-300);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
    transition: var(--transition-fast);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link:hover {
    color: var(--white);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: var(--transition-normal);
}

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

.nav-cta {
    background: var(--gradient-accent);
    color: var(--white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

/* Premium Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-xl);
    position: relative;
}

.hero-container {
    max-width: 900px;
    z-index: 2;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-3xl);
    padding: var(--spacing-5xl) var(--spacing-3xl);
    box-shadow: var(--glass-shadow-lg);
}

.hero-badge {
    display: inline-block;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border-strong);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--glass-shadow-sm);
}

.badge-text {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--gray-100);
}

.hero-title {
    font-size: clamp(2.75rem, 6vw, 4.5rem);
    font-weight: var(--font-weight-black);
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.02em;
}

.title-highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.title-highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    border-radius: var(--radius-sm);
    opacity: 0.2;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 3vw, 1.375rem);
    color: var(--gray-300);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.7;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    font-weight: var(--font-weight-regular);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4xl);
    margin-top: var(--spacing-3xl);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-400);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Premium Upload Section */
.upload-section {
    padding: var(--spacing-5xl) var(--spacing-xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-container {
    max-width: 650px;
    width: 100%;
}

.upload-card {
    background: var(--glass-bg-strong);
    /* Fallback for IE11 */
    background: rgba(255, 255, 255, 0.12);
    background: var(--glass-bg-strong);
    /* Cross-browser backdrop-filter */
    -webkit-backdrop-filter: var(--glass-backdrop-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-3xl);
    padding: var(--spacing-4xl);
    box-shadow: var(--glass-shadow-lg);
    text-align: center;
}

.upload-header {
    margin-bottom: var(--spacing-3xl);
}

.upload-title {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
    color: var(--white);
}

.upload-subtitle {
    color: var(--gray-300);
    font-size: 1.125rem;
    line-height: 1.6;
    font-weight: var(--font-weight-regular);
}

/* File Input Safety - Hidden but still clickable programmatically */
#fileInput {
    position: absolute !important;
    left: -9999px !important;
    top: -9999px !important;
    opacity: 0 !important;
    z-index: -9999 !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
    visibility: hidden !important;
    /* REMOVED: pointer-events: none - prevents programmatic clicks */
}

/* Upload Button Safety - Ensure it's always clickable */
#uploadBtn {
    position: relative !important;
    z-index: 10 !important;
    pointer-events: auto !important;
}

#uploadBtn:disabled {
    pointer-events: none !important;
}

.upload-area {
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-4xl) var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
}

.upload-area:hover {
    border-color: var(--accent-light);
    background: rgba(59, 130, 246, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-area.drag-over {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    transform: scale(1.01);
    box-shadow: var(--shadow-lg);
}

.upload-content {
    pointer-events: none;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.upload-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.7;
    filter: grayscale(0.3);
}

.upload-main {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.upload-link {
    color: var(--accent-light);
    cursor: pointer;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition-fast);
}

.upload-link:hover {
    border-bottom-color: var(--accent-light);
}

.upload-info {
    color: var(--gray-400);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
}

.upload-preview {
    position: relative;
    margin-bottom: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.upload-preview img {
    width: 100%;
    max-height: 350px;
    object-fit: cover;
    border-radius: var(--radius-2xl);
}

.preview-overlay {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.preview-remove {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-backdrop);
    color: var(--white);
    border: 1px solid var(--glass-border);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    transition: var(--transition-fast);
}

.preview-remove:hover {
    background: var(--glass-bg-strong);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.upload-btn {
    width: 100%;
    background: var(--gradient-accent);
    color: var(--white);
    border: none;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-full);
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-normal);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.upload-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.upload-btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-text,
.btn-loader {
    transition: var(--transition-normal);
}

.btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.upload-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--gray-300);
    font-weight: var(--font-weight-medium);
}

.feature-icon {
    font-size: 1.125rem;
    opacity: 0.8;
}

/* Premium Results Section */
.results-section {
    padding: var(--spacing-5xl) var(--spacing-xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.results-container {
    max-width: 650px;
    width: 100%;
}

.results-card {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-3xl);
    padding: var(--spacing-4xl);
    box-shadow: var(--glass-shadow-lg);
    text-align: center;
}

.results-title {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-3xl);
    letter-spacing: -0.01em;
    color: var(--white);
}

.score-display {
    margin-bottom: var(--spacing-3xl);
}

.score-circle {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    position: relative;
    box-shadow: var(--shadow-xl);
    border: 3px solid var(--glass-border);
}

.score-number {
    font-size: 4.5rem;
    font-weight: var(--font-weight-black);
    line-height: 1;
    color: var(--white);
}

.score-max {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    opacity: 0.9;
    color: var(--white);
}

.score-label {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.results-details {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
    text-align: left;
}

.results-actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
}

.share-btn,
.retry-btn {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
}

.share-btn {
    background: var(--gradient-accent);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.retry-btn {
    background: var(--glass-bg);
    color: var(--white);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-backdrop);
}

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

/* Premium Celebrity Examples */
.examples-section {
    padding: var(--spacing-5xl) var(--spacing-xl);
}

.examples-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.examples-title {
    font-size: 2.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
    color: var(--white);
}

.examples-subtitle {
    font-size: 1.25rem;
    color: var(--gray-300);
    margin-bottom: var(--spacing-4xl);
    line-height: 1.6;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.carousel-container {
    position: relative;
}

.carousel {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-item {
    flex: 0 0 100%;
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.5s ease;
}

.carousel-item.active {
    opacity: 1;
    transform: scale(1);
}

.celebrity-card {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-3xl);
    padding: var(--spacing-3xl);
    margin: 0 auto;
    max-width: 450px;
    box-shadow: var(--glass-shadow-lg);
    transition: var(--transition-normal);
}

.celebrity-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

.celebrity-image {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-lg);
    border: 4px solid var(--glass-border-strong);
    box-shadow: var(--shadow-lg);
}

.celebrity-name {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.celebrity-score {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--accent-light);
    margin-bottom: var(--spacing-sm);
}

.celebrity-traits {
    color: var(--gray-300);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-3xl);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background: var(--glass-border);
    cursor: pointer;
    transition: var(--transition-normal);
}

.dot.active {
    background: var(--accent);
    transform: scale(1.3);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.4);
}

/* Premium How It Works */
.how-it-works {
    padding: var(--spacing-5xl) var(--spacing-xl);
    background: rgba(0, 0, 0, 0.1);
}

.how-it-works-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-size: 2.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-4xl);
    letter-spacing: -0.01em;
    color: var(--white);
}

.steps {
    /* Cross-browser grid */
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: repeat(auto-fit, minmax(320px, 1fr));
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
    /* Flexbox fallback for older browsers */
    display: -webkit-box;
    display: -webkit-flex;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    display: grid; /* Override flexbox when grid is supported */
}

.step {
    background: var(--glass-bg-strong);
    /* Fallback for IE11 */
    background: rgba(255, 255, 255, 0.12);
    background: var(--glass-bg-strong);
    /* Cross-browser backdrop-filter */
    -webkit-backdrop-filter: var(--glass-backdrop-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-normal);
}

.step:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--glass-border-strong);
}

.step-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.8;
}

.step-title {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}

.step-description {
    color: var(--gray-300);
    line-height: 1.7;
    font-size: 1rem;
    font-weight: var(--font-weight-regular);
}

/* Premium Trust Section */
.trust-section {
    padding: var(--spacing-5xl) var(--spacing-xl);
    background: rgba(0, 0, 0, 0.15);
}

.trust-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.trust-stats {
    /* Cross-browser grid */
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: repeat(auto-fit, minmax(240px, 1fr));
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-4xl);
    /* Flexbox fallback for older browsers */
    display: -webkit-box;
    display: -webkit-flex;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    display: grid; /* Override flexbox when grid is supported */
}

.trust-stat {
    background: var(--glass-bg-strong);
    /* Fallback for IE11 */
    background: rgba(255, 255, 255, 0.12);
    background: var(--glass-bg-strong);
    /* Cross-browser backdrop-filter */
    -webkit-backdrop-filter: var(--glass-backdrop-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-normal);
}

.trust-stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.trust-number {
    font-size: 2.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--accent-light);
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.trust-label {
    color: var(--gray-300);
    font-weight: var(--font-weight-medium);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.testimonials {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.testimonial {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    box-shadow: var(--glass-shadow);
    font-style: italic;
    color: var(--gray-100);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
    position: absolute;
    width: 100%;
    top: 0;
    font-size: 1.125rem;
    line-height: 1.7;
}

.testimonial.active {
    opacity: 1;
    transform: translateY(0);
    position: relative;
}

/* Premium CTA Section */
.cta-section {
    padding: var(--spacing-5xl) var(--spacing-xl);
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    margin: var(--spacing-2xl);
    border-radius: var(--radius-3xl);
    border: 1px solid var(--glass-border);
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
    color: var(--white);
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--gray-300);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.6;
}

.cta-btn {
    background: var(--gradient-accent);
    color: var(--white);
    border: none;
    padding: var(--spacing-lg) var(--spacing-3xl);
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2xl);
}

/* Premium Footer */
.footer {
    background: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-2xl);
    border-top: 1px solid var(--glass-border);
    margin-top: var(--spacing-5xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-3xl);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
    font-size: 1.25rem;
    color: var(--white);
}

.footer-links {
    display: flex;
    gap: var(--spacing-2xl);
}

.footer-link {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition-fast);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
}

.footer-link:hover {
    color: var(--white);
}

.footer-social {
    display: flex;
    gap: var(--spacing-lg);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition-normal);
    font-size: 1.125rem;
}

.social-link:hover {
    background: var(--glass-bg-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--glass-border);
    color: var(--gray-400);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

/* Premium Toast Notification */
.toast {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-backdrop-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg) var(--spacing-xl);
    box-shadow: var(--glass-shadow-lg);
    transform: translateX(400px);
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 10000;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-message {
    font-weight: var(--font-weight-medium);
    color: var(--white);
    font-size: 0.9rem;
}

/* Premium Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
    }
}

/* Premium Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-5xl: 4rem;
        --spacing-4xl: 3rem;
        --spacing-3xl: 2rem;
    }
    
    .nav {
        width: calc(100% - var(--spacing-lg));
        top: var(--spacing-sm);
    }
    
    .nav-container {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-xl);
        min-height: 90vh;
    }
    
    .hero-container {
        padding: var(--spacing-3xl) var(--spacing-2xl);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .upload-card,
    .results-card {
        padding: var(--spacing-2xl) var(--spacing-lg);
        border-radius: var(--radius-2xl);
    }
    
    .upload-area {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .results-actions {
        flex-direction: column;
    }
    
    .footer-container {
        flex-direction: column;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .trust-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .steps {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .cta-section {
        margin: var(--spacing-lg);
        padding: var(--spacing-3xl) var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }
    
    .section-title,
    .examples-title,
    .cta-title {
        font-size: 2.25rem;
    }
    
    .upload-features {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .score-circle {
        width: 180px;
        height: 180px;
    }
    
    .score-number {
        font-size: 3.5rem;
    }
    
    .celebrity-card {
        max-width: 100%;
        padding: var(--spacing-2xl);
    }
    
    .toast {
        left: var(--spacing-md);
        right: var(--spacing-md);
        top: var(--spacing-md);
        transform: translateY(-100px);
    }
    
    .toast.show {
        transform: translateY(0);
    }
}

/* Premium Performance & Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .bg-particles {
        display: none;
    }
    
    .bg-gradient {
        background: var(--gradient-primary);
    }
}

/* Premium Focus Styles */
button:focus,
.upload-area:focus,
.nav-link:focus,
.nav-cta:focus,
.upload-btn:focus,
.share-btn:focus,
.retry-btn:focus,
.cta-btn:focus {
    outline: 2px solid var(--accent-light);
    outline-offset: 3px;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Enhanced Loading States */
.loading .upload-btn {
    pointer-events: none;
    position: relative;
    overflow: hidden;
}

.loading .btn-text {
    opacity: 0;
    transform: translateY(10px);
}

.loading .btn-loader {
    opacity: 1;
    transform: translateY(0);
}

/* Premium Hover Effects */
@media (hover: hover) {
    .upload-area:hover .upload-icon {
        animation: pulse 1.5s ease-in-out infinite;
        transform: scale(1.05);
    }
    
    .step:hover .step-icon {
        animation: pulse 1.5s ease-in-out infinite;
    }
    
    .nav-cta:hover,
    .upload-btn:not(:disabled):hover,
    .share-btn:hover,
    .cta-btn:hover {
        animation: glow 2s ease-in-out infinite;
    }
}

/* Utility Classes */
.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;
}

/* Print Styles */
@media print {
    .nav,
    .upload-section,
    .cta-section,
    .footer {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .hero-container,
    .results-card,
    .celebrity-card {
        background: transparent !important;
        border: 1px solid #ccc !important;
        box-shadow: none !important;
    }
}

/* ===== MILLION-DOLLAR AGENCY QUALITY ENHANCEMENTS ===== */

/* Enhanced Color Palette */
:root {
    /* Sophisticated Depth Colors */
    --depth-1: rgba(15, 15, 35, 0.95);
    --depth-2: rgba(25, 25, 45, 0.85);
    --depth-3: rgba(35, 35, 55, 0.75);
    
    /* Premium Glass Layers */
    --glass-primary: rgba(255, 255, 255, 0.08);
    --glass-secondary: rgba(255, 255, 255, 0.12);
    --glass-tertiary: rgba(255, 255, 255, 0.16);
    --glass-border-soft: rgba(255, 255, 255, 0.12);
    --glass-border-medium: rgba(255, 255, 255, 0.18);
    --glass-border-strong: rgba(255, 255, 255, 0.25);
    
    /* Advanced Shadows */
    --shadow-ambient: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
    --shadow-elevation-1: 0 4px 24px 0 rgba(0, 0, 0, 0.08), 0 2px 8px 0 rgba(0, 0, 0, 0.04);
    --shadow-elevation-2: 0 8px 40px 0 rgba(0, 0, 0, 0.12), 0 4px 16px 0 rgba(0, 0, 0, 0.06);
    --shadow-elevation-3: 0 16px 64px 0 rgba(0, 0, 0, 0.16), 0 8px 32px 0 rgba(0, 0, 0, 0.08);
    --shadow-floating: 0 24px 80px 0 rgba(0, 0, 0, 0.20), 0 12px 40px 0 rgba(0, 0, 0, 0.10);
    
    /* Sophisticated Transitions */
    --transition-micro: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-swift: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-elegant: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-luxurious: 0.75s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    /* Premium Gradients */
    --gradient-sophisticated: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
    --gradient-glass-primary: linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.06) 100%);
    --gradient-glass-hover: linear-gradient(135deg, rgba(255, 255, 255, 0.16) 0%, rgba(255, 255, 255, 0.08) 100%);
    --gradient-accent-refined: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 50%, #1e40af 100%);
    --gradient-accent-glow: linear-gradient(135deg, #60a5fa 0%, #3b82f6 50%, #2563eb 100%);
}

/* Sophisticated Background System */
html, body {
    background: var(--gradient-sophisticated);
    background-attachment: fixed;
    background-size: cover;
    transition: background var(--transition-elegant);
}

.bg-gradient {
    background: var(--gradient-sophisticated);
    background-attachment: fixed;
    transition: opacity var(--transition-elegant);
}

.bg-particles {
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.04) 2px, transparent 2px),
        radial-gradient(circle at 75% 75%, rgba(139, 92, 246, 0.03) 1px, transparent 1px),
        radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.02) 1px, transparent 1px);
    background-size: 120px 120px, 80px 80px, 200px 200px;
    animation: particleFloat 20s ease-in-out infinite;
    opacity: 0.6;
    transition: opacity var(--transition-elegant);
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.6;
    }
    50% {
        transform: translateY(-10px) rotate(2deg);
        opacity: 0.4;
    }
}

/* Enhanced Glassmorphism System */
.hero-container,
.upload-card,
.results-card,
.celebrity-card,
.step,
.trust-stat {
    background: var(--glass-primary);
    backdrop-filter: blur(24px) saturate(150%);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    border: 1px solid var(--glass-border-soft);
    box-shadow: var(--shadow-elevation-2);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.hero-container::before,
.upload-card::before,
.results-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-glass-primary);
    z-index: 1;
}

/* Premium Hover Effects */
.upload-card:hover,
.celebrity-card:hover,
.step:hover,
.trust-stat:hover {
    background: var(--glass-secondary);
    border-color: var(--glass-border-medium);
    box-shadow: var(--shadow-elevation-3);
    transform: translateY(-2px);
}

/* Sophisticated Navigation */
.nav {
    background: var(--glass-primary);
    backdrop-filter: blur(20px) saturate(120%);
    -webkit-backdrop-filter: blur(20px) saturate(120%);
    border: 1px solid var(--glass-border-soft);
    box-shadow: var(--shadow-ambient);
    transition: all var(--transition-smooth);
}

.nav.scrolled {
    background: var(--depth-1);
    backdrop-filter: blur(32px) saturate(180%);
    -webkit-backdrop-filter: blur(32px) saturate(180%);
    border-color: var(--glass-border-medium);
    box-shadow: var(--shadow-elevation-1);
}

/* Enhanced Button System */
.nav-cta,
.upload-btn,
.share-btn,
.cta-btn {
    position: relative;
    overflow: hidden;
    transition: all var(--transition-smooth);
    box-shadow: var(--shadow-elevation-1);
}

.nav-cta::before,
.upload-btn::before,
.share-btn::before,
.cta-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left var(--transition-elegant);
    z-index: 1;
}

.nav-cta:hover::before,
.upload-btn:not(:disabled):hover::before,
.share-btn:hover::before,
.cta-btn:hover::before {
    left: 100%;
}

.nav-cta:hover,
.upload-btn:not(:disabled):hover,
.share-btn:hover,
.cta-btn:hover {
    background: var(--gradient-accent-glow);
    box-shadow: var(--shadow-floating);
    transform: translateY(-3px) scale(1.02);
}

.upload-btn:not(:disabled):active,
.share-btn:active,
.cta-btn:active {
    transform: translateY(-1px) scale(0.98);
    transition: all var(--transition-micro);
}

/* Refined Upload Area */
.upload-area {
    background: var(--glass-primary);
    backdrop-filter: blur(16px) saturate(120%);
    -webkit-backdrop-filter: blur(16px) saturate(120%);
    border: 2px dashed var(--glass-border-soft);
    transition: all var(--transition-smooth);
    position: relative;
}

.upload-area::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 2px;
    background: linear-gradient(45deg, transparent, var(--glass-border-medium), transparent);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: xor;
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.upload-area:hover {
    background: var(--glass-secondary);
    border-color: var(--accent-light);
    box-shadow: var(--shadow-elevation-2), 0 0 30px rgba(59, 130, 246, 0.15);
    transform: translateY(-2px) scale(1.005);
}

.upload-area:hover::before {
    opacity: 1;
}

.upload-area.drag-over {
    background: var(--glass-tertiary);
    border-color: var(--accent);
    box-shadow: var(--shadow-elevation-3), 0 0 40px rgba(59, 130, 246, 0.25);
    transform: scale(1.01);
}

/* Sophisticated Score Circle */
.score-circle {
    background: var(--gradient-accent-refined);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.score-circle::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: conic-gradient(from 0deg, var(--accent), var(--accent-light), var(--accent), var(--accent-dark), var(--accent));
    border-radius: inherit;
    z-index: -1;
    animation: scoreGlow 4s ease-in-out infinite;
}

@keyframes scoreGlow {
    0%, 100% {
        opacity: 0.6;
        filter: blur(8px);
    }
    50% {
        opacity: 0.8;
        filter: blur(12px);
    }
}

/* Enhanced Carousel */
.carousel-item {
    transition: all var(--transition-elegant);
    opacity: 0.3;
    transform: scale(0.9) translateY(10px);
    filter: blur(2px);
}

.carousel-item.active {
    opacity: 1;
    transform: scale(1) translateY(0);
    filter: blur(0);
}

.dot {
    background: var(--glass-border-soft);
    transition: all var(--transition-smooth);
    position: relative;
}

.dot::before {
    content: '';
    position: absolute;
    inset: -4px;
    background: radial-gradient(circle, var(--accent), transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.dot.active {
    background: var(--accent);
    transform: scale(1.3);
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.5);
}

.dot.active::before {
    opacity: 1;
}

/* Sophisticated Testimonials */
.testimonial {
    transition: all var(--transition-elegant);
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    filter: blur(5px);
}

.testimonial.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
}

/* Premium Focus States */
button:focus-visible,
.upload-area:focus-visible,
.nav-link:focus-visible {
    outline: 2px solid var(--accent-light);
    outline-offset: 4px;
    box-shadow: 
        0 0 0 4px rgba(59, 130, 246, 0.2),
        var(--shadow-elevation-2);
}

/* Advanced Loading States */
.loading .upload-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 100%
    );
    transform: translateX(-100%);
    animation: shimmer 2s ease-in-out infinite;
}

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

/* Micro-Interactions */
.nav-link {
    position: relative;
    transition: all var(--transition-swift);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-accent-refined);
    border-radius: 1px;
    transition: all var(--transition-swift);
    transform: translateX(-50%);
}

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

.nav-link:hover {
    color: var(--white);
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

/* Enhanced Text Animations */
.title-highlight {
    position: relative;
    background: var(--gradient-accent-refined);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-highlight::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent-refined);
    border-radius: 2px;
    opacity: 0.3;
    animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {
    0%, 100% {
        opacity: 0.3;
        transform: scaleX(1);
    }
    50% {
        opacity: 0.6;
        transform: scaleX(1.05);
    }
}

/* Premium Toast */
.toast {
    background: var(--glass-secondary);
    backdrop-filter: blur(24px) saturate(150%);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    border: 1px solid var(--glass-border-medium);
    box-shadow: var(--shadow-floating);
    transition: all var(--transition-elegant);
}

.toast.show {
    animation: toastSlideIn var(--transition-elegant) ease-out;
}

@keyframes toastSlideIn {
    from {
        transform: translateX(400px) rotateY(15deg);
        opacity: 0;
    }
    to {
        transform: translateX(0) rotateY(0);
        opacity: 1;
    }
}

/* Performance Optimizations */
.hero-container,
.upload-card,
.results-card {
    will-change: transform, opacity;
    contain: layout style paint;
}

/* Touch Optimization for iPhone */
@media (max-width: 768px) {
    .nav-cta,
    .upload-btn,
    .share-btn,
    .retry-btn,
    .cta-btn {
        min-height: 48px;
        min-width: 48px;
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: 1.1rem;
    }
    
    .upload-area {
        min-height: 200px;
        padding: var(--spacing-3xl);
    }
    
    .dot {
        width: 16px;
        height: 16px;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .dot::after {
        content: '';
        width: 16px;
        height: 16px;
        background: currentColor;
        border-radius: 50%;
    }
}

/* High-end Device Optimizations */
@media (min-resolution: 2dppx) {
    .hero-container,
    .upload-card,
    .results-card {
        backdrop-filter: blur(32px) saturate(180%);
        -webkit-backdrop-filter: blur(32px) saturate(180%);
    }
}

/* ===== ADDITIONAL MILLION-DOLLAR ENHANCEMENTS ===== */

/* Sophisticated Scroll-Based Animations */
.animate-in {
    animation: sophisticatedFadeIn 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
    opacity: 0;
    transform: translateY(40px) scale(0.95);
}

@keyframes sophisticatedFadeIn {
    0% {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
        filter: blur(10px);
    }
    60% {
        opacity: 0.8;
        transform: translateY(10px) scale(0.98);
        filter: blur(2px);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0);
    }
}

/* Advanced Button Micro-Interactions */
.premium-button {
    position: relative;
    background: var(--gradient-accent-refined);
    border: none;
    border-radius: var(--radius-full);
    color: var(--white);
    cursor: pointer;
    overflow: hidden;
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-smooth);
    box-shadow: var(--shadow-elevation-1);
}

.premium-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-accent-glow);
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.premium-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-smooth);
    pointer-events: none;
}

.premium-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-floating);
}

.premium-button:hover::before {
    opacity: 1;
}

.premium-button:hover::after {
    width: 200px;
    height: 200px;
}

.premium-button:active {
    transform: translateY(-1px) scale(0.98);
    transition: all var(--transition-micro);
}

/* Sophisticated Card Stacking */
.card-stack {
    position: relative;
}

.card-stack::before,
.card-stack::after {
    content: '';
    position: absolute;
    inset: 4px 8px -4px 8px;
    background: var(--glass-primary);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.08);
    z-index: -1;
    transition: all var(--transition-smooth);
}

.card-stack::after {
    inset: 8px 12px -8px 12px;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-color: rgba(255, 255, 255, 0.06);
    z-index: -2;
}

.card-stack:hover::before {
    transform: translateY(-2px) scale(1.01);
    box-shadow: var(--shadow-elevation-1);
}

.card-stack:hover::after {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-ambient);
}

/* Premium Status Indicators */
.status-indicator {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--glass-primary);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border-soft);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.status-indicator::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.2);
    }
}

.status-indicator.warning::before {
    background: var(--warning);
}

.status-indicator.error::before {
    background: var(--error);
}

/* Advanced Glassmorphism Layers */
.glass-layer-1 {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(16px) saturate(120%);
    -webkit-backdrop-filter: blur(16px) saturate(120%);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-layer-2 {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.glass-layer-3 {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.16);
}

/* Sophisticated Typography */
.text-gradient {
    background: var(--gradient-accent-refined);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.text-shimmer {
    background: linear-gradient(
        90deg,
        var(--gray-300) 0%,
        var(--white) 50%,
        var(--gray-300) 100%
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textShimmer 3s ease-in-out infinite;
}

@keyframes textShimmer {
    0%, 100% {
        background-position: -200% 0;
    }
    50% {
        background-position: 200% 0;
    }
}

/* Premium Scroll Indicators */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--glass-bg);
    z-index: 9999;
}

.scroll-progress {
    height: 100%;
    background: var(--gradient-accent-refined);
    width: 0%;
    transition: width 0.1s ease-out;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 10px var(--accent-light);
}

/* Advanced Image Effects */
.image-sophisticated {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-2xl);
}

.image-sophisticated::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 70%
    );
    transform: translateX(-100%) rotate(45deg);
    transition: transform var(--transition-luxurious);
    pointer-events: none;
}

.image-sophisticated:hover::before {
    transform: translateX(100%) rotate(45deg);
}

.image-sophisticated img {
    transition: all var(--transition-smooth);
    filter: grayscale(0) blur(0);
}

.image-sophisticated:hover img {
    transform: scale(1.05);
    filter: grayscale(0) blur(0) brightness(1.1) contrast(1.1);
}

/* Sophisticated Loading States */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--glass-primary) 0%,
        var(--glass-secondary) 50%,
        var(--glass-primary) 100%
    );
    background-size: 200% 100%;
    animation: skeletonLoading 2s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

.skeleton-text {
    height: 1em;
    margin-bottom: var(--spacing-sm);
}

.skeleton-text:last-child {
    width: 60%;
}

/* Premium Form Enhancements */
.form-group {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.form-input {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) var(--spacing-2xl);
    background: var(--glass-primary);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border-soft);
    border-radius: var(--radius-xl);
    color: var(--white);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-smooth);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent-light);
    box-shadow: 
        0 0 0 4px rgba(59, 130, 246, 0.2),
        var(--shadow-elevation-2);
    transform: translateY(-2px);
}

.form-input::placeholder {
    color: var(--gray-400);
    transition: all var(--transition-smooth);
}

.form-input:focus::placeholder {
    color: var(--gray-500);
    transform: translateY(-2px);
}

/* Sophisticated Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--glass-secondary);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border-medium);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-floating);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all var(--transition-smooth);
    z-index: 1000;
    margin-top: var(--spacing-sm);
}

.dropdown:hover .dropdown-content,
.dropdown.active .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.dropdown-item {
    padding: var(--spacing-lg);
    color: var(--gray-100);
    text-decoration: none;
    display: block;
    transition: all var(--transition-swift);
    border-radius: var(--radius-lg);
    margin: var(--spacing-xs);
}

.dropdown-item:hover {
    background: var(--glass-border-soft);
    color: var(--white);
    transform: translateX(4px);
}

/* Performance Indicators */
.fps-indicator {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--glass-secondary);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    color: var(--success);
    z-index: 10000;
    opacity: 0.7;
    transition: opacity var(--transition-smooth);
}

.fps-indicator:hover {
    opacity: 1;
}

/* Celebrity Placeholder Styling */
.celebrity-placeholder {
    width: 150px;
    height: 200px;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border-strong);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    transition: var(--transition-smooth);
}

.celebrity-placeholder:hover {
    transform: scale(1.05);
    box-shadow: var(--glass-shadow-lg);
}

.placeholder-icon {
    font-size: 3rem;
    /* Cross-browser filter */
    -webkit-filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}

/* ===== CROSS-BROWSER COMPATIBILITY FIXES ===== */

/* Internet Explorer 11 Support */
@media screen and (-ms-high-contrast: active), screen and (-ms-high-contrast: none) {
    /* Disable backdrop-filter for IE11 and provide solid background fallback */
    .nav,
    .upload-card,
    .results-card,
    .celebrity-card,
    .step,
    .trust-stat,
    .card-stack {
        backdrop-filter: none !important;
        background: rgba(10, 10, 26, 0.95) !important;
    }
    
    /* Fix flexbox issues in IE11 */
    .nav-container,
    .nav-brand,
    .nav-links,
    .hero-stats,
    .upload-features {
        -ms-flex-align: center;
        -ms-flex-pack: center;
    }
    
    /* Fix grid layout in IE11 */
    .steps,
    .trust-stats {
        display: -ms-grid !important;
        -ms-grid-columns: 1fr 2rem 1fr 2rem 1fr;
    }
    
    .steps .step:nth-child(1) { -ms-grid-column: 1; }
    .steps .step:nth-child(2) { -ms-grid-column: 3; }
    .steps .step:nth-child(3) { -ms-grid-column: 5; }
}

/* Safari-specific fixes */
@supports (-webkit-appearance: none) {
    /* Enhanced backdrop-filter support */
    .nav,
    .upload-card,
    .results-card,
    .celebrity-card,
    .step,
    .trust-stat {
        -webkit-backdrop-filter: saturate(180%) blur(20px);
    }
    
    /* Fix webkit scrollbar styling */
    ::-webkit-scrollbar {
        width: 8px;
        background: var(--gray-900);
    }
    
    ::-webkit-scrollbar-thumb {
        background: var(--glass-border);
        border-radius: 4px;
    }
    
    ::-webkit-scrollbar-thumb:hover {
        background: var(--glass-border-strong);
    }
}

/* Firefox-specific fixes */
@-moz-document url-prefix() {
    /* Fallback for backdrop-filter in older Firefox */
    .nav,
    .upload-card,
    .results-card,
    .celebrity-card,
    .step,
    .trust-stat {
        background: rgba(10, 10, 26, 0.92) !important;
    }
    
    /* Firefox scrollbar styling */
    * {
        scrollbar-width: thin;
        scrollbar-color: var(--glass-border) var(--gray-900);
    }
}

/* Edge-specific fixes */
@supports (-ms-ime-align: auto) {
    .card-stack::before,
    .card-stack::after {
        backdrop-filter: none;
        background: rgba(255, 255, 255, 0.1);
    }
}

/* Mobile WebKit optimizations */
@supports (-webkit-touch-callout: none) {
    /* iOS Safari optimizations */
    body {
        -webkit-overflow-scrolling: touch;
    }
    
    .upload-area,
    .nav-cta,
    .upload-btn,
    .cta-btn {
        -webkit-tap-highlight-color: rgba(59, 130, 246, 0.3);
        -webkit-user-select: none;
        -webkit-touch-callout: none;
    }
    
    /* Fix iOS viewport issues */
    .hero {
        min-height: -webkit-fill-available;
        min-height: 100vh;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --glass-bg: rgba(255, 255, 255, 0.15);
        --glass-bg-strong: rgba(255, 255, 255, 0.2);
        --glass-border: rgba(255, 255, 255, 0.3);
        --glass-border-strong: rgba(255, 255, 255, 0.4);
    }
}

/* 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;
        scroll-behavior: auto !important;
    }
    
    /* Disable parallax and complex animations */
    .bg-particles,
    .bg-gradient {
        transform: none !important;
    }
}

/* Print styles */
@media print {
    .nav,
    .bg-particles,
    .bg-gradient {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .upload-card,
    .results-card {
        background: white !important;
        border: 2px solid black !important;
        box-shadow: none !important;
    }
}