/* ===============================================
   MAIN CSS - Vaibhav Naware Portfolio
   Modern, Professional, Clean Design
   =============================================== */

/* CSS Custom Properties (Variables) */
:root {
    /* Colors - Monochrome with Electric Blue Accent */
    --primary-color: #0070f3;
    --primary-dark: #0051cc;
    --secondary-color: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #9ca3af; /* Improved contrast for accessibility */
    --background-primary: #000000;
    --background-secondary: #111111;
    --background-card: #1a1a1a;
    --border-color: #2a2a2a;
    --accent-gradient: linear-gradient(135deg, #0070f3, #00c6fb);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --section-padding: 2.5rem 0;
    --container-padding: 0 1.5rem;
    --element-spacing: 1.25rem;
    
    /* Borders & Radius */
    --border-radius: 12px;
    --border-radius-large: 20px;
    --border-width: 1px;
    
    /* Shadows */
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===============================================
   RESET & BASE STYLES
   =============================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 4vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.35rem); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* ===============================================
   LAYOUT & CONTAINERS
   =============================================== */

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

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-title {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    margin: 0 auto;
    border-radius: 2px;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-color);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border-bottom-color: var(--primary-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--text-primary);
    box-shadow: var(--shadow-small);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--text-primary);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #000000 100%);
    z-index: -2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 112, 243, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 198, 251, 0.1) 0%, transparent 50%);
    animation: float 6s ease-in-out infinite;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
    z-index: 1;
}

.hero-name {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-bio {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.8s both;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 2px;
    height: 30px;
    background: var(--primary-color);
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -4px;
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    transform: rotate(45deg);
}

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

.about {
    padding: var(--section-padding);
    background: var(--background-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-large);
    border: 3px solid var(--primary-color);
    box-shadow: var(--shadow-medium);
    display: block;
}

.image-placeholder {
    background: var(--background-card);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-large);
    padding: 3rem;
    text-align: center;
    color: var(--text-muted);
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.image-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.greeting h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.quick-facts {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--background-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.quick-facts h4 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.fact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.fact-item i {
    color: var(--primary-color);
    width: 20px;
}

/* ===============================================
   SKILLS SECTION
   =============================================== */

.skills {
    padding: var(--section-padding);
}

.skills-content {
    display: grid;
    gap: 3rem;
    max-width: 100%;
    overflow: hidden;
}

.skills-category {
    margin-bottom: 3rem;
}

.skills-category h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-align: left;
    position: relative;
    z-index: 2;
    padding-left: 0;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    width: 100%;
}

/* Regular grid skill items - only for non-scrolling sections */
.skills-grid:not(.skills-scroll) .skill-item {
    background: var(--background-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    width: 220px;
    height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: none;
    cursor: default;
    pointer-events: none;
    user-select: none;
}

/* Horizontal scrolling for skills with many items */
.skills-scroll {
    display: flex;
    flex-wrap: nowrap;
    gap: 1.5rem;
    padding-bottom: 1rem;
    overflow: hidden;
    position: relative;
    width: 100%;
    max-width: 100%;
    pointer-events: none;
    user-select: none;
}

.skills-scroll .skill-item {
    background: var(--background-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: none;
    cursor: default;
    min-width: 220px;
    max-width: 220px;
    height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    user-select: none;
    flex-shrink: 0;
}

.skill-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

.skill-item span {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Desktop: Infinite scrolling animation */
@media (min-width: 769px) {
    .skills-scroll {
        mask-image: linear-gradient(to right, black 95%, transparent);
        -webkit-mask-image: linear-gradient(to right, black 95%, transparent);
    }
    
    .skills-scroll .skill-item {
        animation: infinite-scroll 35s linear infinite;
    }
    
    @keyframes infinite-scroll {
        0% {
            transform: translateX(0);
        }
        100% {
            transform: translateX(calc(-220px * 6 - 1.5rem * 6));
        }
    }
}

/* Mobile: Infinite scrolling animation with touch scroll enabled */
@media (max-width: 768px) {
    .skills-scroll {
        overflow-x: auto !important;
        overflow-y: hidden;
        scroll-behavior: smooth;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none !important;
        -ms-overflow-style: none !important;
        pointer-events: auto !important;
        user-select: auto !important;
        padding: 0.5rem 0;
        margin: 0;
        mask-image: linear-gradient(to right, black 95%, transparent);
        -webkit-mask-image: linear-gradient(to right, black 95%, transparent);
    }
    
    .skills-scroll::-webkit-scrollbar {
        display: none !important;
    }
    
    .skills-scroll .skill-item {
        min-width: 180px;
        max-width: 180px;
        height: 160px;
        padding: 1.5rem 1rem;
        pointer-events: none !important;
        user-select: none !important;
        animation: infinite-scroll-mobile 35s linear infinite;
    }
    
    @keyframes infinite-scroll-mobile {
        0% {
            transform: translateX(0);
        }
        100% {
            transform: translateX(calc(-180px * 6 - 1.5rem * 6));
        }
    }
}

/* ===============================================
   EDUCATION SECTION
   =============================================== */

.education {
    padding: var(--section-padding);
    background: var(--background-primary);
}

.education-content {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.education-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    background: var(--background-card);
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.education-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.education-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.education-icon i {
    font-size: 1.5rem;
    color: white;
}

.education-details h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.education-details h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

/* ===============================================
   UTILITY CLASSES (Bootstrap-inspired)
   =============================================== */

/* Spacing utilities */
.mt-1 { margin-top: 0.5rem !important; }
.mt-2 { margin-top: 1rem !important; }
.mt-3 { margin-top: 1.5rem !important; }
.mt-4 { margin-top: 2rem !important; }
.mt-5 { margin-top: 3rem !important; }

.mb-1 { margin-bottom: 0.5rem !important; }
.mb-2 { margin-bottom: 1rem !important; }
.mb-3 { margin-bottom: 1.5rem !important; }
.mb-4 { margin-bottom: 2rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.pt-1 { padding-top: 0.5rem !important; }
.pt-2 { padding-top: 1rem !important; }
.pt-3 { padding-top: 1.5rem !important; }
.pt-4 { padding-top: 2rem !important; }
.pt-5 { padding-top: 3rem !important; }

.pb-1 { padding-bottom: 0.5rem !important; }
.pb-2 { padding-bottom: 1rem !important; }
.pb-3 { padding-bottom: 1.5rem !important; }
.pb-4 { padding-bottom: 2rem !important; }
.pb-5 { padding-bottom: 3rem !important; }

/* Text alignment */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

/* Display utilities */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

/* Flex utilities */
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.align-items-center { align-items: center !important; }
.flex-column { flex-direction: column !important; }

/* ===============================================
   TOAST NOTIFICATION (Bootstrap-inspired)
   =============================================== */

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toast {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    min-width: 300px;
    box-shadow: var(--shadow-large);
    animation: slideInRight 0.3s ease-out, fadeOut 0.3s ease-out 4.7s forwards;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.toast.success {
    border-left-color: #10b981;
}

.toast.error {
    border-left-color: #ef4444;
}

.toast i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.toast.success i {
    color: #10b981;
}

.toast.error i {
    color: #ef4444;
}

.toast-content h4 {
    color: var(--text-primary);
    font-size: 1rem;
    margin: 0 0 0.25rem 0;
}

.toast-content p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ===============================================
   RESPONSIVE TYPOGRAPHY (Bootstrap-inspired)
   =============================================== */

/* Enhanced responsive scaling */
@media (max-width: 576px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
    
    .hero-name { font-size: 2.5rem !important; }
    .hero-tagline { font-size: 1rem !important; }
    .section-title { font-size: 2rem !important; }
}

@media (min-width: 577px) and (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    h4 { font-size: 1.5rem; }
}

@media (min-width: 769px) and (max-width: 992px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.5rem; }
    h3 { font-size: 2rem; }
    h4 { font-size: 1.75rem; }
}

@media (min-width: 993px) {
    h1 { font-size: 3.5rem; }
    h2 { font-size: 3rem; }
    h3 { font-size: 2.5rem; }
    h4 { font-size: 2rem; }
}

.education-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.education-meta .duration,
.education-meta .grade {
    background: var(--background-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.education-meta .grade {
    background: var(--primary-color);
    color: white;
}

.education-details p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===============================================
   PROJECTS SECTION
   =============================================== */

.projects {
    padding: var(--section-padding);
    background: var(--background-secondary);
}

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

.project-card {
    background: var(--background-card);
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
}

.project-image {
    height: 200px;
    background: var(--background-secondary);
    border-bottom: 1px solid var(--border-color);
}

.project-image .image-placeholder {
    height: 100%;
    border: none;
    border-radius: 0;
    margin: 0;
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-tagline {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 500;
}

.project-role {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.project-outcomes {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.outcome-badge {
    background: rgba(0, 112, 243, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(0, 112, 243, 0.2);
}

/* ===============================================
   MEDIA SECTION
   =============================================== */

.media {
    padding: var(--section-padding);
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.media-card {
    background: var(--background-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.media-image {
    height: 150px;
    background: var(--background-secondary);
    border-bottom: 1px solid var(--border-color);
}

/* Responsive Video Container */
.media-video {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    background: var(--background-secondary);
    border-bottom: 1px solid var(--border-color);
}

.media-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.media-content {
    padding: 1.5rem;
}

.media-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.media-source {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.media-link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.media-link:hover {
    text-decoration: underline;
}

/* ===============================================
   ACHIEVEMENTS SECTION
   =============================================== */

.achievements {
    padding: var(--section-padding);
    background: var(--background-secondary);
}

.achievement-category {
    margin-bottom: 4rem;
}

.achievement-category:last-child {
    margin-bottom: 0;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.category-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 12px;
    flex-shrink: 0;
}

.category-icon i {
    color: white;
    font-size: 1.5rem;
}

.category-title {
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
}

.achievement-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.achievement-card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
    padding: 1.5rem;
    transition: all var(--transition-normal);
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
    border-color: var(--primary-color);
}

.card-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.achievement-card .achievement-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    border-radius: 12px;
    flex-shrink: 0;
}

.achievement-card .achievement-icon i {
    color: var(--text-primary);
    font-size: 1.3rem;
}

.card-meta {
    flex: 1;
}

.card-meta h4 {
    color: var(--text-primary);
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0 0 0.25rem 0;
    line-height: 1.3;
}

.achievement-org {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin: 0 0 0.25rem 0;
}

.achievement-date {
    display: inline-block;
    background: var(--background-secondary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-weight: 500;
}

.achievement-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}

/* ===============================================
   AWARDS & HONORS SECTION
   =============================================== */

.awards {
    padding: var(--section-padding);
    background: var(--background-secondary);
}

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

.award-card {
    background: var(--background-card);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
}

.award-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
    border-color: var(--primary-color);
}

.award-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    margin-bottom: 1.5rem;
}

.award-icon i {
    color: white;
    font-size: 1.5rem;
}

.award-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    line-height: 1.4;
}

.award-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.award-link:hover {
    color: var(--primary-color);
}

.award-link .fa-external-link-alt {
    font-size: 0.85rem;
    opacity: 0.7;
    transition: all 0.3s ease;
}

.award-link:hover .fa-external-link-alt {
    opacity: 1;
    transform: translateX(3px) translateY(-3px);
}

.award-org {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.award-date {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.award-card p:last-child {
    color: var(--text-secondary);
    line-height: 1.6;
}

.award-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.6rem 1.25rem;
    background: transparent;
    color: var(--primary-color);
    text-decoration: none;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.award-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 112, 243, 0.3);
}

.award-link i {
    font-size: 0.85rem;
}

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

.publications {
    padding: var(--section-padding);
    background: var(--background-primary);
}

.publications-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.publication-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    background: var(--background-card);
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.publication-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.publication-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.5rem;
}

.publication-icon i {
    font-size: 1.25rem;
    color: white;
}

.publication-details h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
    line-height: 1.4;
}

.publication-journal {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.publication-abstract {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.publication-tags .tag {
    background: var(--background-secondary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-weight: 500;
}

.publication-tags .tag:first-child {
    background: var(--primary-color);
    color: white;
}

.publication-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.75rem;
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    transition: all var(--transition-normal);
    vertical-align: middle;
}

.publication-download:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 112, 243, 0.4);
}

.publication-download i {
    font-size: 0.85rem;
}

/* ===============================================
   CERTIFICATIONS SECTION
   =============================================== */

.certifications {
    padding: var(--section-padding);
    background: var(--background-secondary);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.2rem;
}

.certification-card {
    background: var(--background-card);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
}

.certification-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.cert-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    margin-bottom: 1.5rem;
}

.cert-icon i {
    font-size: 1.5rem;
    color: white;
}

.certification-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    line-height: 1.4;
}

.cert-org {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cert-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.75rem;
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    transition: all var(--transition-normal);
    vertical-align: middle;
}

.cert-download:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 112, 243, 0.4);
}

.cert-download i {
    font-size: 0.85rem;
}

.cert-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.cert-skills {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cert-skills .skill-tag {
    background: var(--background-secondary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    font-weight: 500;
}

/* ===============================================
   GALLERY SECTION
   =============================================== */

.gallery {
    padding: var(--section-padding);
    background: var(--background-primary);
}

/* Gallery Filters */
.gallery-filters {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.filter-btn {
    background: var(--background-card);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 112, 243, 0.2);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 112, 243, 0.3);
}

.filter-btn i {
    font-size: 1rem;
}

/* Gallery Counter */
.gallery-counter {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.gallery-counter strong {
    color: var(--primary-color);
    font-weight: 600;
}

.gallery-wrapper {
    position: relative;
    width: 100%;
}

.gallery-container {
    width: 100%;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 0;
    transition: all 0.3s ease;
}

.gallery-item.hidden {
    display: none;
}

.gallery-item.fade-out {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
}

.gallery-nav {
    display: none;
}

.gallery-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--background-card);
    border: 1px solid var(--border-color);
}

.gallery-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
    pointer-events: none;
}

.gallery-item::after {
    content: '\f00e';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    color: white;
    font-size: 3rem;
    z-index: 2;
    transition: transform 0.3s ease;
    pointer-events: none;
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 112, 243, 0.3);
    border-color: var(--primary-color);
}

.gallery-item:hover::before {
    opacity: 1;
}

.gallery-item:hover::after {
    transform: translate(-50%, -50%) scale(1);
}

/* Load More Button */
.gallery-load-more {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
}

.btn-load-more {
    background: var(--background-card);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-load-more:hover {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 112, 243, 0.4);
}

.btn-load-more i {
    font-size: 1.2rem;
}

.btn-load-more .load-count {
    font-size: 0.85rem;
    opacity: 0.8;
}

.btn-load-more.hidden {
    display: none;
}

.gallery-image {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.gallery-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
    user-select: none;
    -webkit-user-drag: none;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    loading: lazy;
}

.gallery-item:hover .gallery-image img {
    transform: scale(1.08);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, 
                rgba(0, 0, 0, 0.85) 0%, 
                rgba(0, 0, 0, 0.4) 50%,
                transparent 100%);
    color: white;
    padding: 1.5rem 1.25rem 1rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay p {
    font-size: 0.9rem;
    font-weight: 500;
    color: #fff;
    line-height: 1.4;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* ===============================================
   TESTIMONIALS SECTION
   =============================================== */

.testimonials {
    padding: var(--section-padding);
    background: var(--background-secondary);
}

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

.testimonial-card {
    background: var(--background-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 4rem;
    color: var(--primary-color);
    font-family: serif;
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 0;
}

.testimonial-author h4 {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.testimonial-author p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
}

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

.contact {
    padding: var(--section-padding);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact-methods {
    margin: 2rem 0;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.contact-method i {
    color: var(--primary-color);
    width: 20px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Form Styles */
.contact-form {
    background: var(--background-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

/* Form Validation States */
.form-group input.valid,
.form-group textarea.valid {
    border-color: #10b981;
}

.form-group input.invalid,
.form-group textarea.invalid {
    border-color: #ef4444;
}

.field-error {
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    display: block;
}

/* Form Status Messages */
.form-status {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-align: center;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid #10b981;
}

.form-status.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid #ef4444;
}

/* Submit Button States */
#submitBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-loader {
    display: none;
}

/* ===============================================
   LIGHTBOX MODAL
   =============================================== */

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
    animation: lightboxZoomIn 0.3s ease;
}

@keyframes lightboxZoomIn {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.lightbox-caption {
    color: white;
    margin-top: 1rem;
    font-size: 1.1rem;
    text-align: center;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.lightbox-close { top: 2rem; right: 2rem; }
.lightbox-prev { left: 2rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 2rem; top: 50%; transform: translateY(-50%); }
.lightbox-prev:hover, .lightbox-next:hover { transform: translateY(-50%) scale(1.1); }
.lightbox-close:hover { transform: scale(1.1); }
.lightbox-close i, .lightbox-prev i, .lightbox-next i { font-size: 1.5rem; }

/* ===============================================
   SCROLL TO TOP BUTTON
   =============================================== */

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(0, 112, 243, 0.4);
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(0, 112, 243, 0.6);
}

.scroll-to-top i {
    color: white;
    font-size: 1.2rem;
}

/* ===============================================
   SCROLL TO TOP BUTTON
   =============================================== */

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(0, 112, 243, 0.4);
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(0, 112, 243, 0.6);
}

.scroll-to-top i {
    color: white;
    font-size: 1.2rem;
}

/* ===============================================
   SCROLL TO TOP BUTTON
   =============================================== */

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;\n    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(100px);
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(0, 112, 243, 0.4);
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(0, 112, 243, 0.6);
    background: var(--primary-hover);
}

.scroll-to-top i {
    color: white;
    font-size: 1.2rem;
}

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

.footer {
    background: var(--background-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-text p {
    color: var(--text-muted);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* ===============================================
   SCROLL TO TOP BUTTON
   =============================================== */

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--text-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

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

.scroll-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: 1rem; }
.gap-2 { gap: 2rem; }
.gap-3 { gap: 3rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

/* ===============================================
   LOADING ANIMATIONS
   =============================================== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-10px) translateX(-50%);
    }
    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* ===============================================
   IMAGE LIGHTBOX MODAL
   =============================================== */

.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    padding: 20px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn 0.3s ease;
}

.lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.8);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
    z-index: 10000;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: var(--primary-color);
    background: rgba(0, 112, 243, 0.2);
}

.lightbox-caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 20px 0;
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.1rem;
    background: rgba(0, 0, 0, 0.7);
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(0, 112, 243, 0.8);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.lightbox-prev {
    left: 30px;
}

.lightbox-next {
    right: 30px;
}

.lightbox-nav:hover {
    background: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-nav:active {
    transform: translateY(-50%) scale(0.95);
}

/* ===============================================
   RESPONSIVE DESIGN PREVIEW
   =============================================== */

@media (max-width: 768px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .facts-grid {
        grid-template-columns: 1fr;
    }

    /* Gallery responsive */
    .gallery-filters {
        gap: 0.5rem;
        padding: 0 1rem;
    }
    
    .filter-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.85rem;
    }
    
    .filter-btn i {
        display: none;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .btn-load-more {
        padding: 0.875rem 2rem;
        font-size: 0.9rem;
    }
    
    .lightbox-close {
        top: 10px;
        right: 10px;
        font-size: 30px;
        width: 40px;
        height: 40px;
    }
    
    .lightbox-nav {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
    
    .lightbox-caption {
        font-size: 0.9rem;
        padding: 0.75rem 1rem;
        bottom: 10px;
    }
}