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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    text-decoration: none;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-btn {
    background: #2563eb;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.3s ease;
}

.lang-btn:hover {
    background: #1d4ed8;
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 25%, #6366f1 50%, #8b5cf6 75%, #a855f7 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
    pointer-events: none;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.floating-element {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.element-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.element-2 {
    width: 60px;
    height: 60px;
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.element-3 {
    width: 40px;
    height: 40px;
    top: 30%;
    right: 30%;
    animation-delay: 4s;
}

.element-4 {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 20%;
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    background: linear-gradient(45deg, #ffffff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 2px solid transparent;
}

.cta-button.primary {
    background: #fff;
    color: #2563eb;
}

.cta-button.secondary {
    background: transparent;
    color: white;
    border-color: white;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.cta-button.primary:hover {
    background: #f8fafc;
}

.cta-button.secondary:hover {
    background: white;
    color: #2563eb;
}

.profile-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    border-radius: 25px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.profile-image {
    margin-bottom: 1.5rem;
    position: relative;
}

.profile-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

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

.profile-card h3 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.profile-card p {
    font-size: 1rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.profile-badges {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-block;
}

.badge.google {
    background: rgba(66, 133, 244, 0.2);
    color: #4285f4;
    border: 1px solid rgba(66, 133, 244, 0.3);
}

.badge.mit {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Trust Section */
.trust-section {
    padding: 80px 0;
    background: #f8fafc;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1e293b;
}

.trust-logos {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.logo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: #64748b;
    font-weight: 500;
}

.logo-item i {
    font-size: 2.5rem;
    color: #2563eb;
}

.achievements {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.achievement-item {
    text-align: center;
}

.achievement-number {
    font-size: 3rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.achievement-text {
    font-size: 1.1rem;
    color: #64748b;
    font-weight: 500;
}

/* Overview Section */
.overview-section {
    padding: 80px 0;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.overview-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
    text-align: center;
}

.overview-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.overview-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
}

.overview-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.overview-card p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.card-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.card-link:hover {
    color: #1d4ed8;
}

.card-link i {
    transition: transform 0.3s ease;
}

.card-link:hover i {
    transform: translateX(3px);
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: #1e293b;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #f8fafc;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #60a5fa;
}

.footer-section p {
    color: #cbd5e1;
    margin-bottom: 0.5rem;
}

.footer-section i {
    margin-right: 0.5rem;
    color: #60a5fa;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

/* Page-specific styles */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.content-section {
    padding: 80px 0;
}

.content-section:nth-child(even) {
    background: #f8fafc;
}

/* About page specific styles */
.about-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tab-btn {
    background: #f1f5f9;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    color: #64748b;
}

.tab-btn.active {
    background: #2563eb;
    color: white;
}

.tab-btn:hover {
    background: #e2e8f0;
}

.tab-btn.active:hover {
    background: #1d4ed8;
}

.tab-content {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block !important;
}

.tab-panel h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #1e293b;
    text-align: center;
}

/* Education Grid */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.education-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.education-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.education-content {
    flex: 1;
}

.education-degree {
    font-weight: 600;
    color: #1e293b;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.education-school {
    color: #2563eb;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.education-focus {
    color: #64748b;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Experience Timeline */
.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: #e2e8f0;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 80px;
}

.timeline-marker {
    position: absolute;
    left: 20px;
    top: 0;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: #2563eb;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 0 0 4px #e2e8f0;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.timeline-period {
    color: #2563eb;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.timeline-company {
    font-size: 1.3rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.timeline-role {
    color: #64748b;
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-description {
    color: #64748b;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.timeline-achievements {
    list-style: none;
}

.timeline-achievements li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.timeline-achievements li::before {
    content: '•';
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Expertise Grid */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.expertise-category {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.expertise-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.expertise-header i {
    background: #dbeafe;
    color: #2563eb;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.expertise-header h3 {
    font-size: 1.3rem;
    color: #1e293b;
    margin: 0;
}

.expertise-list {
    list-style: none;
}

.expertise-list li {
    background: #f8fafc;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    color: #64748b;
    transition: background 0.3s ease;
}

.expertise-list li:hover {
    background: #e2e8f0;
}

/* Skills Summary */
.skills-summary {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.skills-summary h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: #1e293b;
    text-align: center;
}

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

.achievement-card {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid #2563eb;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.achievement-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.achievement-content h4 {
    font-size: 1.1rem;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.achievement-content p {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Speaking page specific styles */
.lectures-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.lectures-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.lectures-intro p {
    font-size: 1.2rem;
    color: #64748b;
    max-width: 800px;
    margin: 0 auto;
}

.lectures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.lecture-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
}

.lecture-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.lecture-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.lecture-number {
    background: #2563eb;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.lecture-category {
    background: #f1f5f9;
    color: #64748b;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
}

.lecture-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #1e293b;
    line-height: 1.3;
}

.lecture-audience {
    margin-bottom: 1.5rem;
}

.audience-tag {
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-right: 0.5rem;
    display: inline-block;
}

.audience-tag.university {
    background: #dbeafe;
    color: #2563eb;
}

.audience-tag.enterprise {
    background: #dcfce7;
    color: #16a34a;
}

.audience-tag.technical {
    background: #fef3c7;
    color: #d97706;
}

.audience-tag.strategic {
    background: #e0e7ff;
    color: #7c3aed;
}

.audience-tag.application {
    background: #fce7f3;
    color: #be185d;
}

.lecture-content h4 {
    font-size: 1.1rem;
    color: #1e293b;
    margin-bottom: 0.5rem;
    margin-top: 1rem;
}

.lecture-points {
    list-style: none;
    margin-bottom: 1rem;
}

.lecture-points li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.lecture-points li::before {
    content: '•';
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.lecture-benefits {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #22c55e;
}

.lecture-benefits h4 {
    color: #1e293b;
    margin-top: 0;
}

.lecture-benefits p {
    color: #64748b;
    margin: 0;
    font-size: 0.95rem;
}

.lecture-tech {
    background: #f0f9ff;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #0ea5e9;
    margin-top: 1rem;
}

.lecture-tech h4 {
    color: #1e293b;
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background: #e0f2fe;
    color: #0369a1;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Consulting Section */
.consulting-section {
    background: #f8fafc;
}

.consulting-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.consulting-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.consulting-intro p {
    font-size: 1.2rem;
    color: #64748b;
    max-width: 800px;
    margin: 0 auto;
}

.consulting-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.consulting-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: transform 0.3s ease;
}

.consulting-card:hover {
    transform: translateY(-3px);
}

.consulting-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
}

.consulting-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.consulting-card ul {
    list-style: none;
    text-align: left;
}

.consulting-card li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.consulting-card li::before {
    content: '•';
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.consulting-cta {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.consulting-cta h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.consulting-cta p {
    color: #64748b;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Projects page specific styles */
.projects-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.projects-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.projects-intro p {
    font-size: 1.2rem;
    color: #64748b;
    max-width: 900px;
    margin: 0 auto;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.project-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.project-category {
    background: #f1f5f9;
    color: #64748b;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
    line-height: 1.3;
}

.project-description {
    margin-bottom: 1.5rem;
}

.project-description p {
    color: #64748b;
    line-height: 1.6;
}

.project-tech,
.project-market,
.project-value,
.project-features {
    margin-bottom: 1.5rem;
}

.project-tech h4,
.project-market h4,
.project-value h4,
.project-features h4 {
    font-size: 1.1rem;
    color: #1e293b;
    margin-bottom: 0.75rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background: #e0f2fe;
    color: #0369a1;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
}

.market-info,
.value-info {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #22c55e;
}

.market-size,
.market-problem,
.market-target,
.value-description,
.value-benefits {
    margin-bottom: 0.5rem;
}

.market-size strong,
.market-problem strong,
.market-target strong,
.value-description strong,
.value-benefits strong {
    color: #1e293b;
}

.project-features ul {
    list-style: none;
}

.project-features li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.project-features li::before {
    content: '•';
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Impact Section */
.impact-section {
    background: #f8fafc;
}

.impact-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.impact-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.impact-intro p {
    font-size: 1.2rem;
    color: #64748b;
}

.impact-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.impact-stat {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease;
}

.impact-stat:hover {
    transform: translateY(-3px);
}

.stat-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #64748b;
    font-weight: 500;
}

/* Publications page specific styles */
.publications-content {
    max-width: 1000px;
    margin: 0 auto;
}

.publications-section {
    margin-bottom: 4rem;
}

.publications-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
    text-align: center;
}

.publications-section p {
    font-size: 1.2rem;
    color: #64748b;
    text-align: center;
    margin-bottom: 2rem;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.book-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.book-card:hover {
    transform: translateY(-3px);
}

.book-cover {
    background: #dbeafe;
    color: #2563eb;
    width: 80px;
    height: 100px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    overflow: hidden;
}

.book-cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.book-content {
    flex: 1;
}

.book-content h3 {
    font-size: 1.2rem;
    color: #1e293b;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.book-content p {
    color: #64748b;
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    text-align: left;
}

.book-details {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.book-topic,
.book-level {
    background: #f1f5f9;
    color: #64748b;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.book-level {
    background: #dbeafe;
    color: #2563eb;
}

.book-level.coming-soon {
    background: #fef3c7;
    color: #d97706;
    border: 1px solid #fbbf24;
}

.patent-stats {
    display: flex;
    gap: 3rem;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.patent-stat {
    text-align: center;
}

.patent-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.patent-text {
    color: #64748b;
    font-weight: 500;
}

.patent-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.patent-category {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: transform 0.3s ease;
}

.patent-category:hover {
    transform: translateY(-3px);
}

.category-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.patent-category h3 {
    font-size: 1.2rem;
    color: #1e293b;
    margin-bottom: 0.75rem;
}

.patent-category p {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.5;
    text-align: left;
}

.papers-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.paper-item {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.paper-icon {
    background: #f1f5f9;
    color: #64748b;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.paper-content {
    flex: 1;
}

.paper-content h3 {
    font-size: 1.1rem;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.paper-content p {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    text-align: left;
}

.paper-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.paper-venue,
.paper-year {
    background: #e0f2fe;
    color: #0369a1;
    padding: 2px 8px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
}

.paper-year {
    background: #f0fdf4;
    color: #16a34a;
}

/* Contact page specific styles */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.contact-info h2,
.booking-form h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.contact-info p,
.booking-form p {
    color: #64748b;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.contact-methods {
    margin-bottom: 3rem;
}

.contact-method {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.contact-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.1rem;
    color: #1e293b;
    margin-bottom: 0.25rem;
}

.contact-details p {
    color: #64748b;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.contact-details span {
    color: #64748b;
    font-size: 0.9rem;
}

.social-links h3 {
    font-size: 1.2rem;
    color: #1e293b;
    margin-bottom: 1rem;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: #64748b;
    transition: color 0.3s ease;
    padding: 1rem;
    border-radius: 8px;
    background: #f8fafc;
}

.social-link:hover {
    color: #2563eb;
    background: #e0f2fe;
}

.social-link i {
    font-size: 1.5rem;
}

.form {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 15px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #1e293b;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.form-group textarea {
    resize: vertical;
}

.submit-btn {
    background: #2563eb;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
    font-size: 1rem;
    width: 100%;
}

.submit-btn:hover {
    background: #1d4ed8;
}

.form-message {
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    font-weight: 500;
    text-align: center;
}

.form-message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.form-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* Services Section */
.services-section {
    background: #f8fafc;
}

.services-section h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e293b;
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-3px);
}

.service-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.service-card p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-card ul {
    list-style: none;
    text-align: left;
}

.service-card li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.service-card li::before {
    content: '•';
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Consulting page specific styles */
.consulting-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.consulting-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.consulting-intro p {
    font-size: 1.2rem;
    color: #64748b;
    max-width: 800px;
    margin: 0 auto;
}

.consulting-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.consulting-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.consulting-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.consulting-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.consulting-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.consulting-card p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.consulting-card ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.consulting-card li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.consulting-card li::before {
    content: '•';
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.consulting-benefits {
    background: #f0fdf4;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #22c55e;
}

.consulting-benefits h4 {
    color: #1e293b;
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.consulting-benefits p {
    color: #64748b;
    margin: 0;
    font-size: 0.95rem;
}

/* Process Section */
.process-section {
    background: #f8fafc;
}

.process-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.process-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.process-intro p {
    font-size: 1.2rem;
    color: #64748b;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.process-step {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: transform 0.3s ease;
}

.process-step:hover {
    transform: translateY(-3px);
}

.step-number {
    background: #2563eb;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.step-content p {
    color: #64748b;
    line-height: 1.6;
}

/* Industries Section */
.industries-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.industries-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.industries-intro p {
    font-size: 1.2rem;
    color: #64748b;
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.industry-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: transform 0.3s ease;
}

.industry-card:hover {
    transform: translateY(-3px);
}

.industry-icon {
    background: #dbeafe;
    color: #2563eb;
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.industry-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: #1e293b;
}

.industry-card p {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .trust-logos {
        gap: 2rem;
    }
    
    .achievements {
        gap: 2rem;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    /* About page responsive */
    .education-grid {
        grid-template-columns: 1fr;
    }
    
    .education-item {
        flex-direction: column;
        text-align: center;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    
    /* Speaking page responsive */
    .lectures-grid {
        grid-template-columns: 1fr;
    }
    
    .consulting-grid {
        grid-template-columns: 1fr;
    }
    
    /* Projects page responsive */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .impact-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Publications page responsive */
    .books-grid {
        grid-template-columns: 1fr;
    }
    
    .book-card {
        flex-direction: column;
        text-align: center;
    }
    
    .patent-stats {
        gap: 2rem;
    }
    
    .patent-categories {
        grid-template-columns: 1fr;
    }
    
    .papers-list {
        grid-template-columns: 1fr;
    }
    
    /* Contact page responsive */
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .social-icons {
        flex-wrap: wrap;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .trust-logos {
        gap: 1rem;
    }
    
    .logo-item i {
        font-size: 2rem;
    }
    
    .achievement-number {
        font-size: 2.5rem;
    }
    
    .overview-card {
        padding: 1.5rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
}

/* Publications section in About page */
.publications-subsection {
    margin-bottom: 3rem;
}

.publications-subsection h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.publications-subsection p {
    color: #64748b;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.book-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    gap: 1rem;
}

.book-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.book-cover {
    background: #dbeafe;
    color: #2563eb;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.book-content {
    flex: 1;
}

.book-content h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #1e293b;
    font-weight: 600;
}

.book-content p {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.book-details {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.book-topic,
.book-level {
    background: #f1f5f9;
    color: #64748b;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.book-level {
    background: #dbeafe;
    color: #2563eb;
}

.book-level.coming-soon {
    background: #fef3c7;
    color: #d97706;
    border: 1px solid #fbbf24;
}

.patent-stats {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.patent-stat {
    text-align: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.patent-number {
    font-size: 3rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.patent-text {
    color: #64748b;
    font-size: 1.1rem;
    font-weight: 500;
}