/* Youngthuim Professional CSS - Modern Design System */

/* ===========================
   1. CSS Variables & Theming
   =========================== */
:root {
    /* Brand Colors */
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #4d94ff;
    --secondary-color: #00c853;
    --accent-color: #ff6b6b;
    
    /* Neutral Colors */
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --background: #ffffff;
    --background-alt: #f8f9fa;
    --background-dark: #001a33;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #001a33 0%, #003366 50%, #0066ff 100%);
    --gradient-card: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    
    /* Typography */
    --font-primary: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Dark Theme */
[data-theme="dark"] {
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-light: #cbd5e0;
    --background: #0f1419;
    --background-alt: #1a202c;
    --background-dark: #000000;
}

/* ===========================
   2. Global Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===========================
   3. Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===========================
   4. Navigation
   =========================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(120deg, rgba(255, 255, 255, 0.95) 0%, rgba(244, 248, 255, 0.92) 100%);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
    transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.main-nav {
    padding: 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    min-height: 84px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    padding: 6px 12px 6px 6px;
    border-radius: 999px;
    transition: transform var(--transition-base), filter var(--transition-base), background var(--transition-base);
}

.logo:hover {
    transform: translateY(-1px);
    filter: drop-shadow(0 10px 18px rgba(0, 102, 255, 0.18));
    background: rgba(102, 126, 234, 0.08);
}

.logo-image {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    flex-shrink: 0;
    box-shadow: 0 10px 24px rgba(0, 102, 255, 0.18);
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0));
}

.logo-text {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.4px;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: clamp(1.6rem, 4vw, 3.2rem);
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 4px;
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-xs);
    transition: color var(--transition-base), transform var(--transition-base);
}

.nav-link:focus-visible {
    outline: 2px solid rgba(102, 126, 234, 0.4);
    border-radius: 12px;
    outline-offset: 4px;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: var(--spacing-xs);
    bottom: -6px;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
    width: calc(100% - (2 * var(--spacing-xs)));
}

.nav-link-label {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.1px;
}

.nav-link-subtitle {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--text-light);
}

.nav-link:hover .nav-link-label,
.nav-link:focus-visible .nav-link-label {
    color: var(--primary-color);
}

.nav-link:hover .nav-link-subtitle,
.nav-link:focus-visible .nav-link-subtitle {
    color: var(--primary-light);
}

body.nav-open {
    overflow: hidden;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 18px);
    left: 50%;
    transform: translate(-50%, -12px);
    background: rgba(255, 255, 255, 0.97);
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 18px;
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.14);
    opacity: 0;
    visibility: hidden;
    padding: var(--spacing-md);
    min-width: 220px;
    list-style: none;
    backdrop-filter: blur(12px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: background var(--transition-base), color var(--transition-base);
}

.dropdown-menu a:hover {
    background: rgba(102, 126, 234, 0.12);
    color: var(--primary-dark);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 48px;
    height: 48px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
    cursor: pointer;
    padding: 0;
    transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.mobile-menu-btn:hover,
.mobile-menu-btn:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 14px 32px rgba(15, 23, 42, 0.14);
    background: rgba(255, 255, 255, 0.95);
}

.mobile-menu-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.mobile-menu-line {
    width: 24px;
    height: 3px;
    border-radius: 999px;
    background: var(--text-primary);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.mobile-menu-btn.active .mobile-menu-line:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.mobile-menu-btn.active .mobile-menu-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .mobile-menu-line:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ===========================
   5. Hero Section
   =========================== */
.hero {
    margin-top: 80px;
    padding: var(--spacing-2xl) 0;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.3;
}

.hero-background canvas {
    width: calc(100% - (2 * var(--spacing-xs)));
    height: 100%;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    animation: fadeInDown 0.8s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease;
    color: white;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s both;
    color: rgba(255, 255, 255, 0.9);
}

.hero-stats-inline {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-badge {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.stat-badge strong {
    display: block;
    font-size: 1.5rem;
    color: white;
}

.stat-badge span {
    font-size: 0.875rem;
    opacity: 0.8;
    color: rgba(255, 255, 255, 0.8);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-partners {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.partner-label {
    font-weight: 600;
    opacity: 0.8;
    color: rgba(255, 255, 255, 0.8);
}

.partner-name {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: white;
}

/* ===========================
   6. Buttons
   =========================== */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

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

/* ===========================
   7. Cards
   =========================== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
}

.feature-card .card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.product-card {
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-primary);
}

.card-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

/* ===========================
   8. Statistics Section
   =========================== */
.stats {
    padding: var(--spacing-2xl) 0;
    background: var(--background-alt);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.stat-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.stat-detail {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

/* ===========================
   9. Features Grid
   =========================== */
.features {
    padding: var(--spacing-2xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.feature-card.enhanced {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card.enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.feature-card.enhanced:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.feature-list li {
    padding: var(--spacing-sm) var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.feature-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-base);
}

.feature-link:hover {
    gap: var(--spacing-md);
}

/* ===========================
   10. Client Section
   =========================== */
.clients {
    padding: var(--spacing-2xl) 0;
    background: var(--background-alt);
}

.client-categories {
    margin-top: var(--spacing-xl);
}

.client-category {
    margin-bottom: var(--spacing-xl);
}

.client-category h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.partner-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.partner-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.partner-card:hover {
    box-shadow: var(--shadow-md);
}

.partner-card strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.exchange-logos {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.exchange-badge {
    background: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    transition: var(--transition-base);
}

.exchange-badge:hover {
    background: var(--primary-color);
    color: white;
}

.client-testimonial-highlight {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.client-testimonial-highlight blockquote {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.client-testimonial-highlight cite {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ===========================
   11. Testimonials
   =========================== */
.testimonials {
    padding: var(--spacing-2xl) 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.testimonial-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.1;
}

.testimonial-quote {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.testimonial-info h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.testimonial-info p {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

/* ===========================
   12. Newsletter
   =========================== */
.newsletter {
    padding: var(--spacing-2xl) 0;
    background: var(--gradient-hero);
    color: white;
    text-align: center;
}

.newsletter h2 {
    color: white;
}

.newsletter p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-input {
    flex: 1;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: none;
    font-size: 1rem;
}

.research-highlights {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.research-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

/* ===========================
   13. Footer
   =========================== */
footer {
    background: var(--background-dark);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-compliance {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: var(--spacing-sm);
}

/* ===========================
   14. Animations
   =========================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ===========================
   15. Responsive Design
   =========================== */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-container {
        padding: 0 var(--spacing-lg);
        gap: var(--spacing-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 92px;
        left: 50%;
        transform: translate(-50%, -12px);
        width: calc(100% - 48px);
        max-height: calc(100vh - 120px);
        overflow-y: auto;
        background: rgba(255, 255, 255, 0.98);
        border: 1px solid rgba(15, 23, 42, 0.08);
        border-radius: 24px;
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-lg);
        padding: var(--spacing-xl);
        box-shadow: 0 28px 60px rgba(15, 23, 42, 0.18);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
        backdrop-filter: blur(18px);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translate(-50%, 0);
    }
    
    .nav-link {
        align-items: flex-start;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: transparent;
        box-shadow: none;
        padding: 0;
        margin-top: var(--spacing-sm);
    }
    
    .dropdown-menu li + li {
        margin-top: var(--spacing-sm);
    }
    
    .dropdown-menu a {
        padding: 0;
        font-size: 0.95rem;
        color: var(--text-secondary);
    }
    
    .dropdown-menu a:hover {
        color: var(--primary-color);
        background: transparent;
    }
    
    .hero-stats-inline {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid,
    .stats-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .logo-image {
        width: 36px;
        height: 36px;
    }
    
    .logo-text {
        font-size: 1.4rem;
    }
}

/* ===========================
   16. Utilities
   =========================== */
.text-center {
    text-align: center;
}

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

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-2xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    border: 3px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* Enhanced Product Cards */
.product-card-enhanced {
    transition: all 0.3s ease !important;
    cursor: pointer;
}

.product-card-enhanced:hover {
    transform: translateY(-10px) !important;
    box-shadow: 0 30px 60px rgba(0,0,0,0.15) !important;
}

.product-card-enhanced .btn {
    transition: all 0.3s ease;
}

.product-card-enhanced:hover .btn {
    transform: scale(1.05);
}

/* Product Grid Responsive */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 768px) {
    .product-card-enhanced {
        margin: 0 10px;
    }
}

/* Print Styles */
@media print {
    header,
    footer,
    .hero-background,
    .newsletter,
    .scroll-to-top {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: black;
        background: white;
    }
    
    .container {
        max-width: 100%;
    }
}