:root {
    --background: #f8fafc;
    --background-secondary: #ffffff;
    --background-accent: #f1f5f9;
    --text: #334155;
    --text-light: #64748b;
    --text-dark: #0f172a;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: #dbeafe;
    --secondary: #1e293b;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--background) 0%, var(--background-accent) 100%);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
    pointer-events: none;
    background: transparent;
}

/* Adjust existing sections to appear above particles */
.navbar, main, section {
    position: relative;
    z-index: 2;
}

.navbar {
    position: fixed;
    width: 100%;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    transition: all 0.3s ease;
}

.navbar ul {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    list-style: none;
    margin: 0;
}

.navbar a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.navbar a:hover {
    color: var(--accent);
    background: var(--accent-light);
    transform: translateY(-2px);
}

.navbar a.active {
    color: var(--accent);
    background: var(--accent-light);
}

.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 6rem 2rem 2rem;
    align-items: center;
    background: linear-gradient(135deg, var(--background) 0%, var(--background-accent) 100%);
    overflow: visible;
}

.hero-content {
    padding: 2rem;
    animation: slideInLeft 0.8s ease-out;
}

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

h1 {
    font-size: 2.8rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.2;
}

h1 span {
    color: var(--accent);
    font-size: 3.2rem;
    display: block;
    margin-top: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bio {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2.5rem;
    color: var(--text-light);
    max-width: 500px;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--shadow-lg);
}

.contact-btn {
    background: var(--gradient-primary);
    color: white;
    border: 2px solid transparent;
}

.contact-btn:hover {
    background: var(--gradient-secondary);
}

.cv-btn {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.cv-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.cv-btn:active {
    transform: translateY(0);
}

.cv-btn i {
    font-size: 0.9em;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: visible;
    min-height: 500px;
    padding: 50px;
}

.portrait-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.portrait-container .profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 6px solid var(--accent-color);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
    transition: all 0.4s ease;
}

.portrait-container:hover .profile-photo {
    transform: scale(1.05);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
    border-color: var(--primary-color);
}

.photo-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    border: 8px solid white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.photo-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.photo-placeholder p {
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.photo-placeholder small {
    font-size: 0.8rem;
    opacity: 0.9;
    padding: 0 1rem;
}

.profile-photo[src="assets/profile-photo.jpg"] {
    opacity: 0;
}

/* Photo placeholder is no longer needed since we're using the actual photo */
.photo-placeholder {
    display: none;
}

.floating-badge {
    position: absolute;
    padding: 0.7rem 1.2rem;
    background: white;
    border: 2px solid var(--accent);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.85rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    animation: float 3s ease-in-out infinite;
    transform-origin: center;
    max-width: 180px;
    text-align: center;
}

/* Badge 1: Web Developer - Top Right */
.badge1 {
    top: 8%;
    right: 5%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    z-index: 10;
    white-space: nowrap;
    animation: floatAlt1 3.2s ease-in-out infinite;
}

/* Badge 2: CSBS Student - Bottom Left */
.badge2 {
    bottom: 20%;
    left: -12%;
    animation: float 3s ease-in-out infinite 1.5s;
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: white;
    border: none;
    z-index: 10;
    white-space: nowrap;
}

/* Badge 3: IEEE Member - Bottom Right */
.badge3 {
    bottom: 45%;
    right: 2%;
    animation: floatAlt2 2.8s ease-in-out infinite 3s;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    border: none;
    z-index: 10;
    white-space: nowrap;
}

/* Badge 4: Maths Club Coordinator - Top Left */
.badge4 {
    top: 35%;
    left: -18%;
    animation: floatAlt3 3.5s ease-in-out infinite 0.75s;
    background: linear-gradient(135deg, #fa709a, #fee140);
    color: white;
    border: none;
    z-index: 10;
    white-space: nowrap;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(2deg); }
}

@keyframes floatAlt1 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-18px) rotate(-2deg); }
}

@keyframes floatAlt2 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(1deg); }
}

@keyframes floatAlt3 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(-1deg); }
}

.wave-divider {
    height: 150px;
    position: relative;
    overflow: hidden;
    background: var(--background);
}

.cloud {
    position: absolute;
    width: 200px;
    height: 60px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 100px;
    animation: float-cloud 20s infinite linear;
    opacity: 0.8;
}

.cloud::before,
.cloud::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
}

.cloud::before {
    width: 100px;
    height: 100px;
    top: -40px;
    left: 40px;
}

.cloud::after {
    width: 80px;
    height: 80px;
    top: -30px;
    left: 90px;
}

.cloud:nth-child(1) {
    top: 20px;
    left: -200px;
    transform: scale(0.6);
    opacity: 0.6;
    animation-delay: 0s;
}

.cloud:nth-child(2) {
    top: 40px;
    left: -100px;
    transform: scale(0.8);
    opacity: 0.7;
    animation-delay: -5s;
}

.cloud:nth-child(3) {
    top: 30px;
    left: 0;
    transform: scale(0.7);
    animation-delay: -10s;
}

@keyframes float-cloud {
    0% {
        transform: translateX(-200px) scale(0.6);
    }
    100% {
        transform: translateX(calc(100vw + 200px)) scale(0.6);
    }
}

.about {
    padding: 80px 20px;
    background-color: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: #2d2d2d;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #007bff;
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    padding: 0 20px;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.6;
}

.about-description {
    margin-bottom: 30px;
    color: #555;
}

.personal-info .info-item {
    margin-bottom: 15px;
    display: flex;
    gap: 10px;
}

.info-label {
    font-weight: 600;
    color: #007bff;
    min-width: 100px;
}

.skills h3 {
    margin-bottom: 25px;
    color: #2d2d2d;
    font-size: 1.5rem;
}

.skill-item {
    margin-bottom: 20px;
    transition: transform 0.3s ease;
    padding: 10px;
    border-radius: 8px;
}

.skill-item:hover {
    transform: translateX(10px);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.1);
}

.skill-name {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.skill-item:hover .skill-name {
    color: var(--accent);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, #007bff, #00c6ff);
    border-radius: 4px;
    transition: width 1s ease-in-out, transform 0.3s ease;
    position: relative;
}

.skill-item:hover .progress {
    transform: scaleY(1.2);
    background: linear-gradient(90deg, var(--accent), #ff8f70);
}

.skill-item:hover .progress::after {
    content: attr(style);
    position: absolute;
    right: 0;
    top: -25px;
    background: var(--accent);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    transform: translateX(50%);
}

.education {
    padding: 100px 20px;
    background: var(--background-secondary);
    position: relative;
    overflow: hidden;
}

.education::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 70%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

/* Education Section - Realistic Book Design */
.education {
    padding: 6rem 2rem;
    background: linear-gradient(135deg, #f7f3f0 0%, #e8ddd4 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.book-container {
    perspective: 1500px;
    width: 100%;
    height: 700px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    margin-top: 2rem;
}

.book {
    position: relative;
    width: 420px;
    height: 600px;
    transform-style: preserve-3d;
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

.book:hover {
    transform: rotateY(-5deg) rotateX(5deg);
}

/* Book spine for 3D effect */
.book-spine {
    position: absolute;
    left: -15px;
    top: 0;
    width: 15px;
    height: 100%;
    background: linear-gradient(90deg, #8B4513, #A0522D, #8B4513);
    transform: rotateY(90deg);
    transform-origin: right;
    border-radius: 3px 0 0 3px;
}

.book-cover {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        #1e3c72 0%, 
        #2a5298 30%, 
        #3b82f6 60%, 
        #1e40af 100%);
    transform-origin: left;
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0 8px 8px 0;
    box-shadow: 
        inset -5px 0 20px rgba(0, 0, 0, 0.2),
        0 5px 25px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    z-index: 100;
    overflow: hidden;
    border: 3px solid #1e40af;
    border-left: none;
}

.book-cover::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    pointer-events: none;
}

.book-cover::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.3) 0%, transparent 50%),
        linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.1) 50%, transparent 60%);
    pointer-events: none;
}

.cover-content {
    color: white;
    text-align: center;
    padding: 40px;
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
}

.cover-title h3 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 1px;
}

.cover-subtitle {
    font-size: 1.1em;
    color: #e0e7ff;
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: 0.5px;
}

.cover-decoration {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, transparent, #ffffff, transparent);
    margin: 20px auto;
    border-radius: 2px;
}

.cover-instruction {
    font-size: 0.9em;
    color: #cbd5e1;
    margin-top: auto;
    opacity: 0.8;
    font-style: italic;
}

.pages {
    position: absolute;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.page {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(135deg, #fefefe 0%, #f8f8f8 100%),
        radial-gradient(circle at 80% 20%, rgba(255, 248, 220, 0.8), transparent 50%);
    background-blend-mode: multiply;
    transform-origin: left;
    transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 0 6px 6px 0;
    box-shadow: 
        inset -10px 0 20px rgba(0, 0, 0, 0.1),
        0 5px 25px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    color: #2c3e50;
    overflow: hidden;
    border-right: 1px solid #e2e8f0;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
}

/* Paper texture effect */
.page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(0deg, 
            transparent, 
            transparent 24px, 
            rgba(0, 0, 0, 0.03) 25px),
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.05), transparent 50%);
    pointer-events: none;
}

/* Page content layout */
.page-content {
    padding: 50px 40px 40px 60px;
    height: 100%;
    position: relative;
    z-index: 2;
}

.page-binding {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 100%;
    background: linear-gradient(90deg, 
        rgba(0, 0, 0, 0.05) 0%, 
        rgba(0, 0, 0, 0.02) 50%, 
        transparent 100%);
    border-right: 2px solid #f1f5f9;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
}

.page-header h3 {
    color: #1e40af;
    font-size: 1.8em;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-number {
    color: #64748b;
    font-size: 1.2em;
    font-weight: 300;
    opacity: 0.7;
}

.timeline-item {
    margin-bottom: 20px;
}

.year {
    color: #3b82f6;
    font-size: 1.3em;
    font-weight: 600;
    margin-bottom: 8px;
}

.institution {
    color: #475569;
    font-size: 1.1em;
    font-weight: 500;
    margin-bottom: 20px;
    font-style: italic;
}

.achievements {
    list-style: none;
    padding: 0;
    margin: 0;
}

.achievements li {
    color: #374151;
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
    line-height: 1.6;
}

.achievements li::before {
    content: "▸";
    color: #3b82f6;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.highlight {
    color: #1e40af;
    font-weight: 600;
}

/* Page turning animations */
.page.turned {
    transform: rotateY(-180deg);
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.book-cover.turned {
    transform: rotateY(-180deg);
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Page stacking order for realistic layering */
.page:nth-child(1) { z-index: 30; }
.page:nth-child(2) { z-index: 20; }
.page:nth-child(3) { z-index: 10; }

/* Enhanced hover effects for realistic book interaction */
.page {
    cursor: pointer;
    user-select: none;
}

.page:hover {
    box-shadow: 
        inset -10px 0 25px rgba(0, 0, 0, 0.15),
        0 8px 30px rgba(0, 0, 0, 0.25);
    transform: translateZ(2px);
}

.book-cover {
    cursor: pointer;
    user-select: none;
}

.book-cover:hover {
    box-shadow: 
        inset -5px 0 25px rgba(0, 0, 0, 0.25),
        0 8px 35px rgba(0, 0, 0, 0.4);
    transform: translateZ(3px);
}

/* Improved page turning animations for smoother experience */
.page.turned {
    transform: rotateY(-180deg);
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.book-cover.turned {
    transform: rotateY(-180deg);
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Navigation hints for realistic eBook experience */
.nav-hint-left,
.nav-hint-right {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 60px;
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    color: #3b82f6;
    opacity: 0;
    transition: all 0.3s ease;
    border-radius: 8px;
    cursor: pointer;
    z-index: 1000;
    font-weight: bold;
}

.nav-hint-left {
    left: 10px;
}

.nav-hint-right {
    right: 10px;
}

.page:hover .nav-hint-left,
.page:hover .nav-hint-right {
    opacity: 0.8 !important;
    background: rgba(59, 130, 246, 0.2);
}

.nav-hint-left:hover,
.nav-hint-right:hover {
    opacity: 1 !important;
    background: rgba(59, 130, 246, 0.3);
    transform: translateY(-50%) scale(1.1);
}

/* Page counter */
.page-counter {
    position: absolute;
    bottom: -40px;
    right: 0;
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Reading progress indicator */
.book-container::after {
    content: '📖 Click left/right sides to navigate • Double-click to reset • Use arrow keys';
    position: absolute;
    bottom: -80px;
    left: 50%;
    transform: translateX(-50%);
    color: #64748b;
    font-size: 0.8em;
    opacity: 0.7;
    text-align: center;
    animation: fadeInUp 1s ease-out 0.5s both;
    max-width: 500px;
    line-height: 1.4;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 0.7;
        transform: translateX(-50%) translateY(0);
    }
}

/* Subtle animations for engagement */
.cover-decoration {
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.can-go-back::before {
    content: '←';
    left: 20px;
    opacity: 0.5;
}

.can-go-forward::before {
    content: '→';
    right: 20px;
    opacity: 0.5;
}

.page:hover::before {
    opacity: 1;
}

.page:active {
    transform: scale(0.995);
}

@keyframes twinkling {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-50%) rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 0.8; }
}

.projects {
    padding: 80px 20px;
    background: var(--background);
}

.project-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    height: 400px;
    perspective: 1500px;
    cursor: pointer;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-radius: 10px;
}

.project-card:hover .card-inner,
.project-card:focus .card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
    overflow: hidden;
}

.card-front {
    background: white;
}

.card-front img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-title {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 1rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
    font-size: 1.2rem;
}

.card-back {
    background: white;
    transform: rotateY(180deg);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card-back h3 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.project-details {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.project-details li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.project-details li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    padding: 0.5rem 1rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: transform 0.3s;
}

.project-link:hover {
    transform: translateY(-2px);
}

.certificates {
    padding: 4rem 2rem;
    background: var(--background);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.certificate-card {
    height: 400px;
    perspective: 1500px;
}

.certificate-card .card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.certificate-card:hover .card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    padding: 2rem;
    background: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card-front {
    transform: rotateY(0deg);
    justify-content: center;
}

.card-back {
    transform: rotateY(180deg);
    justify-content: space-between;
}

.certificate-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
}

.certificate-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.card-front h3 {
    color: var(--text);
    margin-bottom: 1rem;
    text-align: center;
}

.issuer {
    color: var(--accent);
    font-weight: 600;
}

/* Enhanced styling for all certificate cards */

/* Certificate 1 - Forage Software Engineering */
.certificate-card:nth-child(1) .card-front {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: absolute;
    overflow: hidden;
    transform: rotateY(0deg);
    backface-visibility: hidden;
}

.certificate-card:nth-child(1) .card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: certificateShimmer1 3s ease-in-out infinite;
    pointer-events: none;
}

/* Certificate 2 - GenAI GPT-3 */
.certificate-card:nth-child(2) .card-front {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    position: absolute;
    overflow: hidden;
    transform: rotateY(0deg);
    backface-visibility: hidden;
}

.certificate-card:nth-child(2) .card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: certificateShimmer2 3s ease-in-out infinite 0.5s;
    pointer-events: none;
}

/* Certificate 3 - Data Science */
.certificate-card:nth-child(3) .card-front {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    position: absolute;
    overflow: hidden;
    transform: rotateY(0deg);
    backface-visibility: hidden;
}

.certificate-card:nth-child(3) .card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: certificateShimmer3 3s ease-in-out infinite 1s;
    pointer-events: none;
}

/* Certificate 4 - TCS Master Data */
.certificate-card:nth-child(4) .card-front {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: white;
    position: absolute;
    overflow: hidden;
    transform: rotateY(0deg);
    backface-visibility: hidden;
}

.certificate-card:nth-child(4) .card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: certificateShimmer4 3s ease-in-out infinite 1.5s;
    pointer-events: none;
}

/* Certificate 5 - TATA Forage */
.certificate-card:nth-child(5) .card-front {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: white;
    position: absolute;
    overflow: hidden;
    transform: rotateY(0deg);
    backface-visibility: hidden;
}

.certificate-card:nth-child(5) .card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: certificateShimmer5 3s ease-in-out infinite 2s;
    pointer-events: none;
}

/* Certificate 6 - Additional certificate */
.certificate-card:nth-child(6) .card-front {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: white;
    position: absolute;
    overflow: hidden;
    transform: rotateY(0deg);
    backface-visibility: hidden;
}

.certificate-card:nth-child(6) .card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: certificateShimmer6 3s ease-in-out infinite 2.5s;
    pointer-events: none;
}

/* Common styling for all enhanced certificate fronts */
.certificate-card .card-front h3 {
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    font-weight: 700;
    z-index: 1;
    position: relative;
    margin-bottom: 1.5rem;
    text-align: center;
}

.certificate-card .card-front .issuer {
    color: white;
    background: rgba(255,255,255,0.2);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    border: 1px solid rgba(255,255,255,0.3);
    backdrop-filter: blur(10px);
    z-index: 1;
    position: relative;
    font-weight: 600;
}

/* Shimmer animations with different timings */
@keyframes certificateShimmer1 {
    0%, 100% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
        opacity: 1;
    }
}

@keyframes certificateShimmer2 {
    0%, 100% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
        opacity: 1;
    }
}

@keyframes certificateShimmer3 {
    0%, 100% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
        opacity: 1;
    }
}

@keyframes certificateShimmer4 {
    0%, 100% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
        opacity: 1;
    }
}

@keyframes certificateShimmer5 {
    0%, 100% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
        opacity: 1;
    }
}

@keyframes certificateShimmer6 {
    0%, 100% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
        opacity: 1;
    }
}

.certificate-details {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.certificate-details li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.certificate-details li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.view-certificate {
    padding: 0.8rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.view-certificate:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 74, 0.3);
}

.certificate-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    max-width: 90%;
    max-height: 90%;
    position: relative;
}

.modal-content img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 10px;
}

.close-modal {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 2;
    }

    .hero-image {
        order: 1;
    }

    .portrait-container {
        width: 300px;
        height: 300px;
    }

    .cta-buttons {
        justify-content: center;
    }

    .navbar ul {
        gap: 1rem;
        flex-wrap: wrap;
    }

    .about-container {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }

    .book {
        width: 300px;
        height: 400px;
    }

    .page::before {
        display: none;
    }

    .project-gallery {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .project-card {
        height: 350px;
    }

    .certificates-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }

    .certificate-card {
        height: 350px;
    }
}

.contact {
    padding: 6rem 2rem;
    background: var(--background);
}

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

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 0 auto;
    max-width: 1000px;
}

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.contact-card h3 {
    margin-bottom: 0.5rem;
    color: var(--text);
}

.contact-card p {
    color: #666;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 4rem;
}

.social-link {
    color: var(--text);
    font-size: 1.5rem;
    transition: color 0.3s, transform 0.3s;
}

.social-link:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    .contact-info {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

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

.scroll-to-top:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.scroll-to-top:active {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
}