:root {
    --background: #ffffff;
    --background-alt: #f9fafb;
    --text: #333;
    --text-alt: #666;
    --heading: #1a1a1a;
    --primary: #2563eb;
    --primary-light: #e5edff;
    --card-bg: white;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --nav-shadow: 0 2px 4px rgba(0,0,0,0.1);
    --border: #eee;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --featured: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

[data-theme="dark"] {
    --background: #121212;
    --background-alt: #1e1e1e;
    --text: #e0e0e0;
    --text-alt: #b0b0b0;
    --heading: #ffffff;
    --primary: #3b82f6;
    --primary-light: #1e293b;
    --card-bg: #252525;
    --shadow: 0 2px 4px rgba(0,0,0,0.3);
    --nav-shadow: 0 2px 8px rgba(0,0,0,0.4);
    --border: #333;
    --featured: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--background);
    overflow-x: hidden;
}

/* Particle Background */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
    z-index: 1000;
    border: none;
    outline: none;
    font-size: 1.5rem;
    transform-origin: center;
    transition: transform 0.5s ease, background-color 0.3s ease;
}

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

.theme-toggle:active {
    transform: scale(0.9);
}

/* Navigation */
nav {
    background: var(--card-bg);
    box-shadow: var(--nav-shadow);
    position: fixed;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--heading);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 2rem;
    height: 2rem;
    transition: transform 0.3s ease;
}

.nav-logo:hover .logo-icon {
    transform: rotate(10deg);
}

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

.nav-links a {
    color: var(--text-alt);
    text-decoration: none;
    transition: color 0.3s;
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text);
}

/* Hero Section */
.hero {
    padding: 8rem 1rem 4rem;
    background: linear-gradient(to right, var(--background), var(--background-alt));
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--heading);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hero-main {
    color: var(--heading);
    font-size: 3.5rem;
}

.hero-sub {
    color: var(--primary);
    font-size: 2rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.vibe-coder-tag {
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 1.2rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: vibePulse 2s infinite;
    font-weight: bold;
}

@keyframes vibePulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-alt);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    gap: 0.75rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

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

.btn-featured {
    background: var(--featured);
    color: white;
    animation: featuredGlow 3s infinite;
}

@keyframes featuredGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(245, 158, 11, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(245, 158, 11, 0.8);
    }
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.floating-element {
    position: absolute;
    border-radius: 50%;
    background: var(--gradient-2);
    opacity: 0.1;
    animation: float 15s infinite linear;
}

@keyframes float {
    0% {
        transform: translateY(0) rotate(0deg);
    }
    100% {
        transform: translateY(-1000px) rotate(720deg);
    }
}

/* Sections */
section {
    padding: 5rem 1rem;
    position: relative;
}

section:nth-child(even) {
    background: var(--background-alt);
}

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

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--heading);
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

/* Academic Section */
.academics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.academic-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.academic-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--primary);
}

.academic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

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

.gpa {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--heading);
    margin-bottom: 0.5rem;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-1);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--heading);
}

.project-card a {
    color: var(--primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    margin-top: 1rem;
    transition: all 0.3s;
}

.project-card a:hover {
    text-decoration: underline;
    transform: translateX(5px);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.tech-tag {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.875rem;
}

/* GitHub Section */
.github-section {
    text-align: center;
}

.github-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.github-stat {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    min-width: 150px;
}

.github-stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

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

.repo-card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: left;
}

.repo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.repo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.repo-name {
    font-weight: bold;
    color: var(--heading);
}

.repo-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-alt);
}

.repo-stats span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    margin-bottom: 1rem;
    color: var(--heading);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.skill-list li::before {
    content: "→";
    margin-right: 0.5rem;
    color: var(--primary);
}

.skill-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    width: 0;
    transition: width 1s ease;
}

/* Contact */
.contact-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    color: white;
    font-weight: 500;
    transition: opacity 0.3s, transform 0.3s;
    gap: 0.75rem;
}

.contact-btn:hover {
    opacity: 0.9;
    transform: translateY(-3px);
}

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

.github-btn {
    background: #333;
}

.instagram-btn {
    background: linear-gradient(45deg, #405DE6, #5851DB, #833AB4, #C13584, #E1306C, #FD1D1D);
}

.facebook-btn {
    background: #1877f2;
}

.email-btn {
    background: #ea4335;
}

.btn-icon {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    stroke: white;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.github-icon {
    animation: pulse 2s infinite;
}

.instagram-icon {
    animation: pulse 2s infinite;
}

.facebook-icon {
    animation: spin 3s infinite;
}

.email-icon {
    animation: bounce 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(10deg);
    }
    75% {
        transform: rotate(-10deg);
    }
    100% {
        transform: rotate(0deg);
    }
}

/* Footer */
footer {
    background: var(--card-bg);
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-alt);
    border-top: 1px solid var(--border);
}

/* Theme transition animation */
.theme-transition {
    animation: themeTransition 0.5s ease;
}

@keyframes themeTransition {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .menu-btn {
        display: block;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        padding: 1rem;
        box-shadow: var(--shadow);
    }

    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-main {
        font-size: 2.5rem;
    }
    
    .hero-sub {
        font-size: 1.5rem;
    }
    
    .vibe-coder-tag {
        font-size: 1rem;
    }

    .contact-links {
        flex-direction: column;
    }

    .hero-btns {
        flex-direction: column;
    }
}