/* ===================================
   DR. SAM LI WEIXIAN - PROFESSIONAL WEBSITE
   Inspired by Danilo McGarry's design approach
   Mobile-first, professional AI consulting design
   =================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background-color: #ffffff;
    overflow-x: hidden;
}

/* ===================================
   CSS CUSTOM PROPERTIES
   =================================== */

:root {
    /* Primary Colors */
    --primary-blue: #1e40af;
    --primary-blue-dark: #1e3a8a;
    --primary-blue-light: #3b82f6;
    
    /* Secondary Colors */
    --secondary-purple: #7c3aed;
    --secondary-teal: #0d9488;
    --secondary-orange: #ea580c;
    
    /* Neutral Colors */
    --neutral-black: #0a0a0a;
    --neutral-gray-900: #111827;
    --neutral-gray-800: #1f2937;
    --neutral-gray-700: #374151;
    --neutral-gray-600: #4b5563;
    --neutral-gray-500: #6b7280;
    --neutral-gray-400: #9ca3af;
    --neutral-gray-300: #d1d5db;
    --neutral-gray-200: #e5e7eb;
    --neutral-gray-100: #f3f4f6;
    --neutral-gray-50: #f9fafb;
    --neutral-white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1e40af 0%, #7c3aed 100%);
    --gradient-secondary: linear-gradient(135deg, #0d9488 0%, #3b82f6 100%);
    --gradient-dark: linear-gradient(135deg, #111827 0%, #1f2937 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Border Radius */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    
    /* Shadows */
    --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);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

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

.text-white { color: var(--neutral-white); }
.text-gray-600 { color: var(--neutral-gray-600); }
.text-gray-900 { color: var(--neutral-gray-900); }

.bg-light { background-color: var(--neutral-gray-50); }
.bg-dark { background: var(--gradient-dark); }

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-blue);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    z-index: 10000;
}

.skip-link:focus {
    top: 6px;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    line-height: 1.2;
    font-weight: 600;
    color: var(--neutral-gray-900);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--neutral-white);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--neutral-gray-900);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--neutral-gray-600);
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ===================================
   NAVIGATION
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--neutral-gray-200);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-sm);
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .nav-container {
        padding: var(--spacing-md) var(--spacing-lg);
    }
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.nav-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.brand-content {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--neutral-gray-900);
    line-height: 1;
}

.brand-tagline {
    font-size: var(--font-size-sm);
    color: var(--neutral-gray-600);
    line-height: 1;
}

.nav-menu {
    display: none;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
}

.nav-link {
    text-decoration: none;
    color: var(--neutral-gray-700);
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-blue);
    background-color: var(--neutral-gray-50);
}

.nav-cta {
    background: var(--gradient-primary);
    color: white !important;
    font-weight: 600;
}

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

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background-color: var(--neutral-gray-700);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.nav-toggle:hover .hamburger-line {
    background-color: var(--primary-blue);
}

/* Mobile Menu */
@media (max-width: 767px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background: white;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        transition: left var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: var(--font-size-xl);
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .nav-toggle.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    cursor: pointer;
    min-height: 44px;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    min-height: 56px;
}

.btn-full {
    width: 100%;
}

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

.btn-primary:hover {
    background: var(--gradient-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-icon {
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(2px);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--gradient-dark);
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                      radial-gradient(circle at 75% 75%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.floating-element {
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float var(--duration, 20s) ease-in-out infinite;
    animation-delay: var(--delay, 0s);
}

.floating-element:nth-child(1) {
    top: 10%;
    left: 10%;
}

.floating-element:nth-child(2) {
    top: 60%;
    right: 10%;
}

.floating-element:nth-child(3) {
    bottom: 20%;
    left: 20%;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) translateX(0px);
    }
    33% {
        transform: translateY(-20px) translateX(10px);
    }
    66% {
        transform: translateY(10px) translateX(-5px);
    }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

@media (min-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content {
    text-align: center;
}

@media (min-width: 1024px) {
    .hero-content {
        text-align: left;
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    padding: var(--spacing-xs) var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.badge-icon {
    font-size: var(--font-size-lg);
}

.hero-stats {
    margin-bottom: var(--spacing-xl);
}

.stat-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

@media (min-width: 640px) {
    .stat-group {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: white;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

@media (min-width: 640px) {
    .hero-actions {
        flex-direction: row;
        justify-content: center;
    }
}

@media (min-width: 1024px) {
    .hero-actions {
        justify-content: flex-start;
    }
}

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

.profile-container {
    position: relative;
    max-width: 400px;
}

.profile-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-2xl);
    border: 4px solid rgba(255, 255, 255, 0.1);
}

.profile-highlights {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    width: 100%;
    max-width: 280px;
}

.highlight {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--neutral-gray-800);
    box-shadow: var(--shadow-lg);
}

.highlight-icon {
    font-size: var(--font-size-base);
}

/* ===================================
   SECTIONS
   =================================== */

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

/* ===================================
   ABOUT SECTION
   =================================== */

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

@media (min-width: 1024px) {
    .about-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.about-text p {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--neutral-gray-600);
}

.credentials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

@media (min-width: 640px) {
    .credentials-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.credential h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: var(--spacing-md);
}

.credential ul {
    list-style: none;
}

.credential li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-gray-600);
    line-height: 1.6;
}

.credential li::before {
    content: "→";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

.achievement-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .achievement-cards {
        grid-template-columns: 1fr 1fr;
    }
}

.achievement-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-gray-200);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.achievement-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.achievement-text {
    font-size: var(--font-size-sm);
    color: var(--neutral-gray-600);
    font-weight: 500;
}

/* ===================================
   SERVICES SECTION
   =================================== */

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 640px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-gray-200);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.service-card.featured {
    border: 2px solid var(--primary-blue);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.02) 0%, rgba(124, 58, 237, 0.02) 100%);
}

.service-card.featured::before {
    content: "FEATURED";
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-xl);
    margin-bottom: var(--spacing-lg);
    color: white;
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: var(--spacing-md);
}

.service-description {
    color: var(--neutral-gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.service-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.service-features li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-gray-600);
    font-size: var(--font-size-sm);
}

.service-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--secondary-teal);
    font-weight: bold;
}

.service-cta {
    margin-top: auto;
}

/* ===================================
   EXPERIENCE SECTION
   =================================== */

.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

@media (min-width: 768px) {
    .experience-timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    padding-left: 80px;
}

@media (min-width: 768px) {
    .timeline-item {
        width: calc(50% - 40px);
        padding-left: 0;
        padding-right: var(--spacing-xl);
    }
    
    .timeline-item:nth-child(even) {
        margin-left: calc(50% + 40px);
        padding-right: 0;
        padding-left: var(--spacing-xl);
    }
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 22px;
    top: 20px;
    width: 16px;
    height: 16px;
    background: var(--primary-blue);
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: var(--shadow-md);
}

@media (min-width: 768px) {
    .timeline-item::before {
        left: auto;
        right: -8px;
    }
    
    .timeline-item:nth-child(even)::before {
        right: auto;
        left: -8px;
    }
}

.timeline-date {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.timeline-content {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-gray-200);
    transition: all var(--transition-normal);
}

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

.company-logo {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.company-image {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: var(--border-radius-md);
}

.role-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: var(--spacing-xs);
}

.company-name {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.role-description {
    color: var(--neutral-gray-600);
    line-height: 1.6;
}

/* ===================================
   SPEAKING SECTION
   =================================== */

.speaking-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

@media (min-width: 1024px) {
    .speaking-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Speaking Visual Section */
.speaking-visual {
    order: 2;
}

@media (min-width: 1024px) {
    .speaking-visual {
        order: 1;
    }
}

.speaking-content {
    order: 1;
}

@media (min-width: 1024px) {
    .speaking-content {
        order: 2;
    }
}

/* Event Images Styling */
.event-images {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 640px) {
    .event-images {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .event-images {
        grid-template-columns: 1fr;
    }
}

.event-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.event-image:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.event-photo {
    width: 100%;
    height: 150px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

@media (min-width: 1024px) {
    .event-photo {
        height: 120px;
    }
}

.event-image:hover .event-photo {
    transform: scale(1.05);
}

.speaking-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 640px) {
    .speaking-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .speaking-stats {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-gray-200);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.speaking-topics h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: var(--spacing-lg);
}

.topics-list {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.topics-list li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-gray-600);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.topics-list li::before {
    content: "🎯";
    position: absolute;
    left: 0;
    top: 0;
}

.media-features {
    margin-top: var(--spacing-3xl);
}

.media-features h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.media-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.media-item a {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: white;
    border: 1px solid var(--neutral-gray-200);
    border-radius: var(--border-radius-lg);
    color: var(--neutral-gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.media-item a:hover {
    color: var(--primary-blue);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   PUBLICATIONS SECTION
   =================================== */

.publications-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

@media (min-width: 1024px) {
    .publications-grid {
        grid-template-columns: 1fr 2fr;
    }
}

.publication-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 640px) {
    .publication-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .publication-stats {
        grid-template-columns: 1fr;
    }
}

.stat-large {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-gray-200);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.stat-large .stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-large .stat-label {
    font-size: var(--font-size-base);
    color: var(--neutral-gray-600);
    font-weight: 500;
}

.publications-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: var(--spacing-lg);
}

.publications-list {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.publications-list li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--neutral-gray-600);
    line-height: 1.6;
}

.publications-list li::before {
    content: "📄";
    position: absolute;
    left: 0;
    top: 0;
}

.publication-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* ===================================
   CONTACT SECTION
   =================================== */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

@media (min-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-info .section-title {
    color: var(--neutral-white);
}

.contact-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-lg);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

.contact-features {
    margin-bottom: var(--spacing-xl);
}

.contact-feature {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feature-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.contact-feature h4 {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.contact-feature p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.contact-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    color: white;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* ===================================
   CONTACT FORM
   =================================== */

.contact-form {
    background: white;
    padding: var(--spacing-3xl);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-2xl);
}

.form-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.form-header h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: var(--spacing-sm);
}

.form-header p {
    color: var(--neutral-gray-600);
    font-size: var(--font-size-base);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--neutral-gray-700);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--neutral-gray-300);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background-color: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: var(--neutral-gray-900);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand {
    display: flex;
    align-items: start;
    gap: var(--spacing-md);
}

.footer-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.footer-brand-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: white;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.footer-description {
    color: var(--neutral-gray-400);
    line-height: 1.6;
}

.footer-links h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: white;
    margin-bottom: var(--spacing-md);
}

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

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

.footer-links a {
    color: var(--neutral-gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-social {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-social a {
    color: var(--neutral-gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--neutral-gray-800);
    text-align: center;
    color: var(--neutral-gray-400);
    font-size: var(--font-size-sm);
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
}

@media (min-width: 768px) {
    .footer-bottom-links {
        justify-content: flex-end;
    }
}

.footer-bottom-links a {
    color: var(--neutral-gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
    color: white;
}

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .btn-large {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .service-card,
    .timeline-content,
    .contact-form {
        padding: var(--spacing-lg);
    }
    
    .stat-group {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   ACCESSIBILITY ENHANCEMENTS
   =================================== */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-contrast: high) {
    .btn {
        border-width: 3px;
    }
    
    .service-card,
    .timeline-content,
    .achievement-card {
        border-width: 2px;
    }
}

/* Focus indicators */
*:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

button:focus,
.btn:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* ===================================
   PRINT STYLES
   =================================== */

@media print {
    .navbar,
    .nav-toggle,
    .floating-elements,
    .hero-actions,
    .contact-form,
    .footer {
        display: none !important;
    }
    
    .hero {
        background: white !important;
        color: black !important;
        min-height: auto !important;
        padding: 2rem 0 !important;
    }
    
    .hero-title,
    .section-title {
        color: black !important;
    }
    
    .section {
        padding: 1rem 0 !important;
    }
    
    .service-card,
    .timeline-content,
    .achievement-card {
        break-inside: avoid;
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}

/* ===================================
   TRUSTED BY SECTION
   =================================== */

.trusted-logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    align-items: center;
    margin-top: 3rem;
}

.logo-item {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.logo-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.trust-logo {
    max-width: 120px;
    max-height: 60px;
    width: auto;
    height: auto;
    object-fit: contain;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.logo-item:hover .trust-logo {
    opacity: 1;
}

/* ===================================
   MEDIA LOGOS ENHANCEMENT
   =================================== */

.media-logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.media-item {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.media-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.media-logo {
    max-width: 150px;
    max-height: 50px;
    width: auto;
    height: auto;
    object-fit: contain;
}

/* ===================================
   SPEAKING GALLERY
   =================================== */

.speaking-gallery {
    margin-top: 3rem;
    text-align: center;
}

.speaking-gallery h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neutral-gray-900);
    margin-bottom: 2rem;
}

.event-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.event-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.event-image:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.event-photo {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.event-image:hover .event-photo {
    transform: scale(1.05);
}

/* ===================================
   RESPONSIVE UPDATES
   =================================== */

@media (max-width: 768px) {
    .trusted-logos {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 1rem;
    }
    
    .media-logos {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .event-images {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .logo-item {
        padding: 0.75rem;
    }
    
    .trust-logo {
        max-width: 100px;
        max-height: 50px;
    }
}