:root {
    /* Color Palette - Dark Theme (Default) */
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --secondary: #8b5cf6;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --hover-glow: rgba(59, 130, 246, 0.5);
    --card-hover-bg: rgba(255, 255, 255, 0.08);
}

.light-theme {
    --bg-color: #f8fafc;
    --text-color: #0f172a;
    --text-muted: #475569;
    --primary: #2563eb;
    --secondary: #7c3aed;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
    --hover-glow: rgba(37, 99, 235, 0.4);
    --card-hover-bg: rgba(255, 255, 255, 0.9);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* Typography & Utilities */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.section-title span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

.mt-5 {
    margin-top: 3rem;
}

.hover-glow {
    transition: all 0.3s ease;
}

.hover-glow:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px var(--hover-glow);
    background: var(--card-hover-bg);
    border-color: var(--primary);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 1000;
    font-size: 1.5rem;
    color: white;
    box-shadow: 0 0 15px var(--hover-glow);
    transition: transform 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 100;
    transition: padding 0.3s ease;
}

nav.scrolled {
    padding: 0.8rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    margin: 0 5%;
    border-radius: 50px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-color);
    text-decoration: none;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
}

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

.greeting {
    font-size: 1.2rem;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.name {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.title {
    font-size: 2rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    height: 40px;
}

.typing-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
}

.typing-text::after {
    content: '|';
    animation: blink 1s step-end infinite;
    color: var(--primary);
}

@keyframes blink {
    50% { opacity: 0; }
}

.intro {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    max-width: 600px;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6);
}

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

.btn-secondary:hover {
    background: var(--glass-bg);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
}

/* Shared Sections */
section {
    padding: 100px 0;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    padding: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--text-muted);
}

.about-text strong {
    color: var(--primary);
}

.img-container {
    width: 300px;
    height: 300px;
    margin: 0 auto;
    position: relative;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--primary);
    box-shadow: var(--glass-shadow);
    position: relative;
    z-index: 1;
}

.img-glow {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--gradient);
    filter: blur(30px);
    opacity: 0.3;
    z-index: 0;
    animation: pulse 4s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.1; }
    100% { transform: scale(1.05); opacity: 0.3; }
}

/* Skills Section */
.skills-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
}

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

.skill-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skill-card i {
    font-size: 2.5rem;
    color: var(--secondary);
}

.skill-card h4 {
    font-size: 1.1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: var(--gradient);
    border-radius: 10px;
    width: 0;
    transition: width 1.5s ease-out;
}

/* Languages */
.lang-grid {
    display: flex;
    gap: 2rem;
    margin-top: 1.5rem;
}

.lang-card {
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.lang-card h4 {
    font-size: 1.2rem;
}

.badge {
    background: var(--gradient);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

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

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

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 2rem;
}

.timeline-dot {
    position: absolute;
    top: 5px;
    left: 12px;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary);
}

.timeline-content {
    padding: 1.5rem;
}

.year {
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: block;
}

.degree {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.institution {
    color: var(--text-muted);
}

/* Extra Curricular Section */
.sub-section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

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

.extra-card {
    padding: 2rem;
    text-align: center;
}

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

.extra-card h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.extra-card p {
    color: var(--text-muted);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    text-align: center;
}

.contact-card {
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.icon-box {
    width: 60px;
    height: 60px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Footer */
footer {
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
}

.footer-content {
    padding: 1.5rem;
}

/* Scroll Revel */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 991px) {
    .name { font-size: 3.5rem; }
    .title { font-size: 1.5rem; }
    .about-content { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-color);
        padding: 2rem;
        border-radius: 0 0 20px 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    
    .nav-links.active {
        display: flex;
    }

    .hamburger { display: block; }

    .name { font-size: 2.8rem; }
    .hero { text-align: center; }
    .cta-buttons { justify-content: center; }
}