:root {
    --bg-dark: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #38bdf8;
    --accent-secondary: #818cf8;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-hover: rgba(255, 255, 255, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Background Blobs for vibrant aesthetics */
.blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.5;
    animation: float 20s infinite alternate;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(56,189,248,0.3) 0%, rgba(15,23,42,0) 70%);
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(129,140,248,0.2) 0%, rgba(15,23,42,0) 70%);
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(5%, 10%) scale(1.1); }
}

/* Typography */
h1, h2, h3, h4 {
    font-family: 'Space Grotesk', sans-serif;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.subsection-title {
    font-size: 1.8rem;
    margin: 3rem 0 1.5rem;
    text-align: center;
}

/* Reusable Components */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    background: var(--glass-hover);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    border: none;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(56, 189, 248, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--glass-hover);
    border-color: var(--accent-primary);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    padding: 1.5rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
}

.hero-content {
    max-width: 800px;
}

.profile-img-container {
    width: 180px;
    height: 180px;
    margin: 0 auto 2rem;
    border-radius: 50%;
    padding: 4px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.2);
    transition: transform 0.3s ease;
}

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

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--bg-dark);
}

.greeting {
    font-size: 1.2rem;
    color: var(--accent-primary);
    letter-spacing: 2px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
}

.name {
    font-size: clamp(3rem, 8vw, 5rem);
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

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

.social-links a {
    color: var(--text-secondary);
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

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

/* About Section */
.about-grid {
    display: flex;
    justify-content: center;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.quick-facts {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.quick-facts li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    background: rgba(255,255,255,0.05);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.quick-facts i {
    color: var(--accent-primary);
}

/* Timeline (Education) */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--glass-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    margin-left: 3rem;
    padding: 2rem;
}

.timeline-dot {
    position: absolute;
    left: -2.8rem;
    top: 2.5rem;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-primary);
}

.timeline-date {
    display: inline-block;
    padding: 0.2rem 0.8rem;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-primary);
    border-radius: 12px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.timeline-item h3 {
    margin-bottom: 0.5rem;
}

.timeline-subtitle {
    color: var(--text-secondary);
}

/* Courses */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.course-card {
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.course-icon {
    font-size: 2.5rem;
    color: var(--accent-secondary);
    margin-bottom: 1rem;
}

.course-card h4 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.course-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Flip Card CSS */
.flip-card {
    background-color: transparent;
    width: 100%;
    height: 250px;
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

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

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 20px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.flip-card-front {
    /* Style handled by glass-card class */
}

.flip-card-back {
    transform: rotateY(180deg);
    background-color: #fff;
    overflow: hidden;
}

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

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

.project-card {
    display: flex;
    flex-direction: column;
}

.project-date {
    font-size: 0.85rem;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
    display: block;
}

.project-content h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

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

.project-tags span {
    font-size: 0.8rem;
    padding: 0.3rem 0.8rem;
    background: rgba(255,255,255,0.05);
    border-radius: 15px;
    color: #cbd5e1;
}

/* Activities */
.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

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

.activity-icon {
    font-size: 1.8rem;
    color: var(--accent-primary);
}

.activity-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Contact */
.contact-card {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.contact-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: color 0.3s ease;
}

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

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--glass-border);
    margin-top: 4rem;
    color: var(--text-secondary);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* Add a hamburger menu for production */
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        margin-left: 1rem;
        padding: 1.5rem;
    }
    
    .timeline-dot {
        left: -1rem;
    }
}