:root {
    --primary-color: #0a2647;
    --secondary-color: #00d9ff;
    --accent-color: #ff6b9d;
    --bg-light: #f8f9fa;
    --text-dark: #2c3e50;
    --text-light: #ffffff;
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    background: var(--primary-color) !important;
    padding: 1rem 0;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--secondary-color) !important;
}

.nav-link {
    font-weight: 500;
    margin: 0 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color) !important;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-light);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.profile-img-wrapper {
    position: relative;
    display: inline-block;
}

.hero-profile-img {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    border: 5px solid var(--secondary-color);
    object-fit: cover;
    box-shadow: 0 20px 60px rgba(0, 217, 255, 0.4);
    position: relative;
    z-index: 2;
    animation: float 3s ease-in-out infinite;
}

.profile-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 270px;
    height: 270px;
    border-radius: 50%;
    background: var(--secondary-color);
    opacity: 0.3;
    filter: blur(20px);
    animation: pulse 2s ease-in-out infinite;
}

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

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.5; }
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-title .highlight {
    color: var(--secondary-color);
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.2);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 0.5rem;
}

.hero-buttons .btn {
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--secondary-color);
    border: none;
    color: var(--primary-color);
}

.btn-primary:hover {
    background: #00b8d4;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 217, 255, 0.3);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.hero-location {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
}

.data-visualization {
    position: relative;
    width: 100%;
    height: 100%;
}

.floating-icon {
    position: absolute;
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.3);
    animation: floatAround 8s ease-in-out infinite;
}

.icon-1 { top: 10%; left: 20%; animation-delay: 0s; }
.icon-2 { top: 30%; right: 20%; animation-delay: 1s; }
.icon-3 { top: 50%; left: 10%; animation-delay: 2s; }
.icon-4 { bottom: 30%; right: 30%; animation-delay: 3s; }
.icon-5 { bottom: 10%; left: 40%; animation-delay: 4s; }

@keyframes floatAround {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(30px, -30px) rotate(90deg); }
    50% { transform: translate(-20px, 20px) rotate(180deg); }
    75% { transform: translate(20px, 30px) rotate(270deg); }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator a {
    color: var(--text-light);
    font-size: 2rem;
    opacity: 0.7;
}

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

/* Sections */
section {
    padding: 5rem 0;
}

.section-bg {
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.title-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    margin: 0 auto 3rem;
    border-radius: 2px;
}

/* Experience Timeline */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--secondary-color);
    border: 4px solid var(--text-light);
    border-radius: 50%;
    z-index: 2;
    box-shadow: 0 0 0 4px var(--secondary-color);
}

.experience-card {
    background: var(--text-light);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    width: calc(50% - 30px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.experience-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
}

.experience-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.experience-header {
    margin-bottom: 1.5rem;
}

.experience-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.company-name {
    font-size: 1.1rem;
    color: var(--secondary-color);
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.date-badge {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    display: inline-block;
}

.experience-list {
    list-style: none;
    padding: 0;
}

.experience-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #f0f0f0;
    color: var(--text-dark);
}

.experience-list li:last-child {
    border-bottom: none;
}

.experience-list li i {
    color: var(--secondary-color);
}

/* Skill Cards */
.skill-card {
    background: var(--text-light);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    height: 100%;
    text-align: center;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--secondary-color)20, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.skill-card:hover::before {
    opacity: 0.1;
}

.skill-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--secondary-color);
    box-shadow: 0 15px 40px rgba(0, 217, 255, 0.2);
}

.skill-icon {
    font-size: 3.5rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 1;
}

.skill-card:hover .skill-icon {
    transform: scale(1.2) rotate(5deg);
    color: var(--accent-color);
}

.skill-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.skill-card p {
    color: #666;
    position: relative;
    z-index: 1;
}

/* Certification Cards */
.cert-card {
    background: var(--text-light);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.cert-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 0 0 0 100%;
    opacity: 0.1;
}

.cert-card:hover {
    transform: translateY(-10px);
    border-color: var(--secondary-color);
    box-shadow: 0 15px 40px rgba(0, 217, 255, 0.2);
}

.cert-icon {
    font-size: 4rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.cert-card h4 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.cert-id {
    color: var(--secondary-color);
    font-weight: 600;
    display: block;
    margin-bottom: 1rem;
}

.cert-date {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    display: inline-block;
}

/* Achievement Cards */
.achievement-card {
    background: var(--text-light);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.achievement-card:hover::before {
    transform: scaleX(1);
}

.achievement-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.achievement-icon {
    font-size: 3.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.achievement-card:hover .achievement-icon {
    transform: scale(1.2) rotate(10deg);
}

.achievement-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.achievement-desc {
    color: #666;
    margin-bottom: 1.5rem;
}

.achievement-date {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    display: inline-block;
}

/* Education Card */
.education-card {
    background: var(--text-light);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.education-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--secondary-color)20, transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    animation: rotate 10s linear infinite;
}

.education-card:hover::before {
    opacity: 0.1;
}

@keyframes rotate {
    to { transform: rotate(360deg); }
}

.education-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 217, 255, 0.2);
}

.education-icon {
    font-size: 4rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.education-card h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.institution-name {
    font-size: 1.2rem;
    color: var(--secondary-color);
    font-weight: 600;
    display: block;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.education-date {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 0.75rem 2rem;
    border-radius: 25px;
    font-size: 1rem;
    display: inline-block;
    position: relative;
    z-index: 1;
}

/* Interest Cards */
.interest-card {
    background: var(--text-light);
    padding: 3rem 2rem;
    border-radius: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    height: 100%;
    position: relative;
    overflow: hidden;
    color: var(--text-dark);
    display: block;
    border: 3px solid transparent;
}

.interest-card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-color)20, transparent 70%);
    border-radius: 50%;
    transition: transform 0.6s ease;
}

.interest-card:hover::before {
    transform: translate(-50%, -50%) scale(1);
}

.interest-card:hover {
    transform: translateY(-15px) scale(1.03);
    border-color: var(--accent-color);
    box-shadow: 0 20px 50px rgba(255, 107, 157, 0.3);
}

.interest-icon-wrapper {
    position: relative;
    z-index: 2;
    margin-bottom: 1.5rem;
}

.interest-icon {
    font-size: 4rem;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform 0.3s ease;
    display: inline-block;
}

.interest-card:hover .interest-icon {
    transform: scale(1.2) rotate(10deg);
}

.interest-card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.interest-card p {
    color: #666;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 2;
}

.interest-arrow {
    position: relative;
    z-index: 2;
    color: var(--secondary-color);
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.interest-card:hover .interest-arrow {
    transform: translateX(10px);
}

/* Contact Section */
#contact {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-light);
}

.contact-info {
    max-width: 700px;
    margin: 0 auto;
}

.contact-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem 2rem;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.contact-icon {
    font-size: 2rem;
    color: var(--secondary-color);
}

.contact-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.social-link {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.social-link:hover {
    background: var(--secondary-color);
    color: var(--primary-color);
    transform: translateY(-5px) scale(1.1);
    border-color: var(--secondary-color);
}

/* Footer */
footer {
    background: var(--primary-color) !important;
}

footer p {
    margin: 0;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: row !important;
    }
    
    .experience-card {
        width: calc(100% - 50px);
        margin-left: 50px;
    }
    
    .timeline-marker {
        left: 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .stat-item {
        flex: 1;
        min-width: 120px;
    }
}

@media (max-width: 576px) {
    .hero-profile-img {
        width: 200px;
        height: 200px;
    }
    
    .profile-glow {
        width: 220px;
        height: 220px;
    }
}