:root {
    --primary-navy: #0f172a;
    --secondary-navy: #1e293b;
    --light-navy: #334155;
    --primary-teal: #06b6d4;
    --light-teal: #67e8f9;
    --dark-teal: #0891b2;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dark: #1e293b;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --bg-light: #f8fafc;
    
    --accent-green: #10b981;
    --accent-purple: #8b5cf6;
    --accent-orange: #f59e0b;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(6, 182, 212, 0.3);
    
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --navbar-bg: rgba(248, 250, 252, 0.95);
    --navbar-border: rgba(30, 41, 59, 0.1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-16);
    background: linear-gradient(135deg, var(--primary-teal), var(--light-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-teal), var(--dark-teal));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--light-teal), var(--primary-teal));
}

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

.btn-secondary:hover {
    background: var(--primary-teal);
    color: white;
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--bg-card);
    transform: translateY(-2px);
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--navbar-bg, rgba(15, 23, 42, 0.95));
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--navbar-border, rgba(51, 65, 85, 0.3));
    z-index: 9999;
    transition: all var(--transition-normal);
    width: 100%;
}

[data-theme="light"] .navbar {
    background: rgba(248, 250, 252, 0.95) !important;
    border-bottom: 1px solid rgba(30, 41, 59, 0.1) !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

/* Default dark navbar */
[data-theme="dark"] .navbar,
body:not([data-theme]) .navbar {
    background: rgba(15, 23, 42, 0.95) !important;
    border-bottom: 1px solid rgba(51, 65, 85, 0.3) !important;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-teal), var(--light-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-8);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-teal);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-teal), var(--light-teal));
    transition: width var(--transition-normal);
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.theme-toggle {
    background: none;
    border: 2px solid var(--bg-card);
    color: var(--text-secondary);
    padding: var(--space-2);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--primary-teal);
    border-color: var(--primary-teal);
    transform: scale(1.05);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
    border-radius: 2px;
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-20) 0;
    padding-top: calc(80px + var(--space-20)); /* Account for fixed navbar height */
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

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

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.wave {
    display: inline-block;
    animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-10deg); }
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--primary-teal);
    margin-bottom: var(--space-6);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 500px;
}

.hero-image {
    position: relative;
    z-index: 3;
    margin-bottom: 20px;
}

.hero-profile-img {
    width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--primary-teal);
    box-shadow: var(--shadow-glow);
    transition: transform var(--transition-normal);
}

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

/* Fallback for missing profile image */
.hero-profile-img {
    background: linear-gradient(135deg, var(--primary-teal), var(--light-teal));
}

.hero-profile-img[src*="profile-pic.jpg"] {
    background: none;
}

.hero-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-teal), var(--light-teal));
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 200px;
    height: 200px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 20%;
    animation-delay: 2s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    top: 10%;
    right: 10%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* About Section */
.about {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-image {
    position: relative;
}

.profile-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-normal);
}

.profile-img:hover {
    transform: scale(1.05) rotate(2deg);
}

.about-text {
    max-width: 600px;
}

.about-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin: var(--space-8) 0;
}

.stat {
    text-align: center;
    padding: var(--space-4);
    background: var(--bg-card);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

.stat:hover {
    transform: translateY(-4px);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-teal);
    margin-bottom: var(--space-2);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Skills Section */
.skills {
    padding: var(--space-20) 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.skill-category {
    background: var(--bg-card);
    padding: var(--space-8);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.category-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-teal);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    transition: all var(--transition-normal);
}

.skill-item:hover {
    background: var(--primary-navy);
    transform: translateX(8px);
}

.skill-item i {
    font-size: 1.5rem;
    color: var(--primary-teal);
}

.skill-item span {
    font-weight: 500;
    color: var(--text-secondary);
}

/* Projects Section */
.projects {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-8);
}

.project-card {
    background: var(--bg-card);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    position: relative;
}

.project-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-links {
    display: flex;
    gap: var(--space-4);
}

.project-link {
    width: 50px;
    height: 50px;
    background: var(--primary-teal);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.project-link:hover {
    background: var(--light-teal);
    transform: scale(1.1);
}

.project-content {
    padding: var(--space-6);
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tech-tag {
    background: rgba(6, 182, 212, 0.1);
    color: var(--primary-teal);
    padding: var(--space-1) var(--space-3);
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid rgba(6, 182, 212, 0.2);
}

/* Experience Section */
.experience {
    padding: var(--space-20) 0;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--primary-teal), var(--light-teal));
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: var(--space-12);
}

.timeline-item:nth-child(odd) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-teal);
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
    box-shadow: 0 0 0 4px var(--primary-teal);
}

.timeline-content {
    background: var(--bg-card);
    padding: var(--space-6);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    margin: 0 var(--space-8);
    transition: transform var(--transition-normal);
}

.timeline-content:hover {
    transform: scale(1.02);
}

.timeline-header {
    margin-bottom: var(--space-4);
}

.job-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.company {
    color: var(--primary-teal);
    font-weight: 500;
    display: block;
    margin-bottom: var(--space-1);
}

.duration {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.achievements {
    list-style: none;
    margin-bottom: var(--space-4);
}

.achievements li {
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
    position: relative;
    padding-left: var(--space-4);
}

.achievements li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--primary-teal);
    font-weight: bold;
    font-size: 0.8em;
}

.tech-used {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tech-used span {
    background: rgba(6, 182, 212, 0.1);
    color: var(--primary-teal);
    padding: var(--space-1) var(--space-2);
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Contact Section */
.contact {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: start;
}

.contact-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-4);
    border-radius: 0.75rem;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.contact-link:hover {
    background: var(--bg-card);
    color: var(--primary-teal);
    border-color: var(--primary-teal);
    transform: translateX(8px);
}

.contact-link i {
    font-size: 1.25rem;
    width: 24px;
}

.contact-form-container {
    background: var(--bg-card);
    padding: var(--space-8);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    padding: var(--space-3);
    border: 2px solid var(--bg-secondary);
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-teal);
    background: var(--bg-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    padding: var(--space-8) 0;
    background: var(--primary-navy);
    border-top: 1px solid var(--bg-card);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left p {
    color: var(--text-muted);
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background: var(--primary-teal);
    color: white;
    transform: scale(1.1);
}

/* Resume Buttons */
.resume-buttons {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-top: var(--space-4);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd) {
        justify-content: flex-start;
        padding-left: 60px;
        padding-right: 0;
    }
    
    .timeline-marker {
        left: 20px;
    }
    
    .timeline-content {
        margin: 0;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .nav-container {
        padding: 0 var(--space-4);
    }
    
    .hero {
        padding-top: calc(80px + var(--space-12)); /* Less padding on mobile */
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        height: calc(100vh - 80px);
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-xl);
        padding: var(--space-8);
        justify-content: flex-start;
        gap: var(--space-6);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-profile-img {
        display: none; /* Hide profile image on mobile */
    }
    
    .hero-visual {
        display: none; /* Hide entire hero visual section on mobile */
    }
    
    .resume-buttons {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-list {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .contact-form-container {
        padding: var(--space-6);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .project-content {
        padding: var(--space-4);
    }
    
    .timeline-content {
        padding: var(--space-4);
    }
}