/* CSS Variables for Theme */
:root {
    /* Light Theme (Default) */
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #38bdf8;
    --background-color: #f9fafb;
    --card-bg-color: #ffffff;
    --text-color: #111827;
    --text-light: #4b5563;
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --neon-glow: 0 0 5px rgba(37, 99, 235, 0.5);
}

/* Dark Theme */
.dark-mode {
    --primary-color: #60a5fa;
    --secondary-color: #93c5fd;
    --accent-color: #38bdf8;
    --background-color: #111827;
    --card-bg-color: #1f2937;
    --text-color: #f3f4f6;
    --text-light: #d1d5db;
    --border-color: #4b5563;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --neon-glow: 0 0 10px rgba(96, 165, 250, 0.7);
}

/* General Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

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

/* Futuristic Background Elements */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(var(--accent-color) 1px, transparent 1px),
        radial-gradient(var(--accent-color) 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: 0 0, 25px 25px;
    opacity: 0.03;
    z-index: -1;
}

.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg, 
        rgba(37, 99, 235, 0.05) 0%, 
        rgba(56, 189, 248, 0.05) 100%
    );
    z-index: -2;
}

/* Subtle animated aurora glow */
.bg-aurora {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(600px 300px at 10% 20%, rgba(56,189,248,0.15), transparent 60%),
        radial-gradient(600px 300px at 90% 30%, rgba(37,99,235,0.18), transparent 60%),
        radial-gradient(300px 500px at 50% 80%, rgba(99,102,241,0.12), transparent 60%);
    filter: blur(20px);
    z-index: -3;
    animation: auroraFloat 12s ease-in-out infinite alternate;
}

@keyframes auroraFloat {
    from { transform: translateY(0) }
    to { transform: translateY(-20px) }
}

/* Container and Section Styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
    position: relative;
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-color);
    box-shadow: var(--neon-glow);
}

/* Header and Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 0;
    background-color: var(--card-bg-color);
    background-color: color-mix(in oklab, var(--card-bg-color) 80%, transparent);
    box-shadow: 0 2px 10px var(--shadow-color);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    text-shadow: var(--neon-glow);
}

.logo span {
    color: var(--text-color);
    font-weight: 300;
}

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

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

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

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

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

/* Active nav link */
.nav-links a.active {
    color: var(--primary-color);
}
.nav-links a.active::after {
    width: 100%;
}

.theme-toggle, .mobile-menu-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover, .mobile-menu-btn:hover {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
    position: relative;
    overflow: hidden;
}

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

.hero-text {
    flex: 1;
    min-width: 300px;
    padding-right: 2rem;
}

.hero-image {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-img {
    width: clamp(220px, 60vw, 350px);
    height: auto;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    box-shadow: var(--card-shadow);
    border: 4px solid var(--primary-color);
    animation: morphing 10s infinite;
}

@keyframes morphing {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    25% { border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%; }
    50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
    75% { border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%; }
    100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

/* Gradient neon title */
.hero-title {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

/* Typewriter caret */
.typewriter::after {
    content: '|';
    margin-left: 6px;
    color: var(--primary-color);
    animation: blink 1s steps(1, end) infinite;
}

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: var(--card-shadow);
    margin-right: 1rem;
    margin-bottom: 1rem;
    border: none;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 20px -5px var(--shadow-color);
}

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

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

/* About Section */
.about {
    background-color: var(--card-bg-color);
    box-shadow: var(--card-shadow);
    border-radius: 20px;
    margin: 5rem auto;
    max-width: 1100px;
    position: relative;
}

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

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.about-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.info-item {
    margin-bottom: 1rem;
}

.info-item h4 {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.3rem;
}

.info-item p {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0;
}

/* Skills Section */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    background-color: var(--card-bg-color);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s;
}

.skill-category:hover {
    transform: translateY(-10px);
}

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

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-item {
    background-color: var(--background-color);
    border-radius: 50px;
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-color);
}

.skill-item i {
    color: var(--primary-color);
}

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

.project-card {
    background-color: var(--card-bg-color);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s;
    position: relative;
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.project-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-item {
    background-color: var(--background-color);
    border-radius: 50px;
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.project-links a:hover {
    text-decoration: underline;
}

/* Contact Section */
.contact {
    background-color: var(--card-bg-color);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: var(--card-shadow);
    max-width: 1100px;
    margin: 5rem auto;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.contact-details {
    margin-bottom: 2rem;
}

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

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--background-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.3rem;
    border: 1px solid var(--border-color);
}

.contact-item-text h4 {
    font-size: 1.1rem;
    margin-bottom: 0.2rem;
}

.contact-item-text p, .contact-item-text a {
    color: var(--text-light);
    text-decoration: none;
}

.contact-item-text a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: var(--background-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    text-decoration: none;
    transition: transform 0.3s;
    border: 1px solid var(--border-color);
}

.social-link:hover {
    transform: translateY(-5px);
    background-color: var(--primary-color);
    color: white;
}

.contact-form {
    background-color: var(--background-color);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background-color: var(--card-bg-color);
    color: var(--text-color);
    font-family: 'Poppins', sans-serif;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
footer {
    background-color: var(--card-bg-color);
    padding: 5rem 0;
    position: relative;
    scroll-margin-top: 80px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    text-shadow: var(--neon-glow);
}

.footer-logo span {
    color: var(--text-color);
    font-weight: 300;
}

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

.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-social {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.copyright {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: var(--card-shadow);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    z-index: 999;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* Scroll progress bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    z-index: 1100;
    box-shadow: var(--neon-glow);
}

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

.animated {
    opacity: 0;
}

.fadeInUp {
    animation: fadeInUp 0.8s forwards;
}

/* Loading Animation */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: opacity 0.5s, visibility 0.5s;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(37, 99, 235, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s infinite linear;
    margin: 0 auto 1rem;
}

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

.loader-text {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 1.2rem;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        gap: 2rem;
    }

    .hero-text {
        padding-right: 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--card-bg-color);
        padding: 2rem;
        box-shadow: 0 5px 10px var(--shadow-color);
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
        transform: translateY(-150%);
        transition: transform 0.3s;
        z-index: 999;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links a { padding: 0.5rem 0; }

    .projects-container {
        grid-template-columns: 1fr;
    }

    .contact {
        padding: 2rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .profile-img {
        width: clamp(200px, 70vw, 280px);
        height: auto;
    }

    .about-info {
        grid-template-columns: 1fr;
    }

    .skills-container {
        grid-template-columns: 1fr;
    }
}

/* Cursor Effect */
.cursor {
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%);
    pointer-events: none;
    transition: width 0.3s, height 0.3s, border-color 0.3s;
    z-index: 9999;
    box-shadow: var(--neon-glow);
}

.cursor-dot {
    width: 4px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 9999;
}

/* Lock background scroll when nav is open on mobile */
body.nav-open { overflow: hidden; touch-action: none; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}