:root {
    --bg-color: #121212;
    --text-color: #ffffff;
    --accent-color: #3498db;
    --secondary-bg-color: #1e1e1e;
}

.light-theme {
    --bg-color: #ffffff;
    --text-color: #333333;
    --accent-color: #2980b9;
    --secondary-bg-color: #f0f0f0;
}

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

html, body {
    height: 100%;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--secondary-bg-color);
    width: 100%;
    padding: 1rem 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    padding: 0 1rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
    z-index: 1001;
}

.theme-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-color);
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.theme-toggle:hover {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style-type: none;
    padding: 0;
    margin: 0;
    position: relative;
}

/* Fallback for when JavaScript doesn't load */
.nav-menu {
    display: flex;
    list-style-type: none;
    padding: 0;
    margin: 0;
    position: relative;
}

/* Ensure navigation works on all screen sizes */
@media (min-width: 769px) {
    .nav-menu {
        display: flex !important;
        position: static !important;
        flex-direction: row !important;
        background: none !important;
        width: auto !important;
        box-shadow: none !important;
        left: auto !important;
        top: auto !important;
    }
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 0.5rem;
}

.nav-menu li {
    margin-left: 1.5rem;
    position: relative;
}

.nav-menu li a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s, border-bottom 0.3s;
    position: relative;
    padding: 0.5rem;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--accent-color);
    transform: translateY(-2px);
    transition: all 0.3s ease;
}

.nav-menu li a.active::after {
    content: "";
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
    position: absolute;
    bottom: -5px;
    left: 0;
}

main {
    flex: 1;
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.page-container {
    background: var(--secondary-bg-color);
    border-radius: 15px;
    padding: 3rem 2rem;
    margin: 2rem auto;
    max-width: 1400px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    width: 100%;
}

.page-container h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

h1 {
    font-size: 2.5rem;
    line-height: 1.2;
}

p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.highlight {
    color: var(--accent-color);
}

.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
}

.hero-content {
    max-width: 600px;
    margin-bottom: 2rem;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 50%;
}

.social-links-container {
    margin-top: auto;
}

.social-links {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
    background-color: var(--bg-color);
}

.social-links a {
    margin: 0 1rem;
    font-size: 2rem;
    color: var(--text-color);
    transition: color 0.3s;
}

.social-links a:hover {
    color: var(--accent-color);
    transform: scale(1.2);
    transition: all 0.3s ease;
}

footer {
    background-color: var(--secondary-bg-color);
    text-align: center;
    padding: 1rem 0;
    width: 100%;
}

.hero {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
    flex-direction: row;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-content {
    max-width: 600px;
    margin-right: 2rem;
    text-align: left;
    flex: 1;
}

.hero-image {
    max-width: 200px;
    flex-shrink: 0;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 50%;
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

/* Mobile hero section fix */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 1rem;
    }

    .hero-content {
        text-align: center;
        margin-right: 0;
        margin-bottom: 2rem;
        max-width: 100%;
    }

    .hero-image {
        margin-top: 0;
        max-width: 180px;
        order: -1;
        margin-bottom: 1.5rem;
    }
}

/* Certification styles */
.certifications-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

.cert-card {
    background: var(--secondary-bg-color);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.cert-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

.cert-badge-container {
    position: relative;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.cert-badge {
    width: 120px;
    height: 120px;
    object-fit: contain;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.credly-embed {
    width: 220px;
    height: 270px;
    margin: 0 auto;
    transition: transform 0.3s ease;
    border-radius: 12px;
    overflow: hidden;
}

.credly-embed iframe {
    border-radius: 12px;
    transition: transform 0.3s ease;
}



.cert-badge-container:hover .cert-badge {
    transform: scale(1.05);
}

.cert-badge-container:hover .credly-embed {
    transform: scale(1.05);
}

.cert-content h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
    font-size: 1.3rem;
}

.cert-content p {
    margin-bottom: 2rem;
    line-height: 1.6;
    color: var(--text-color);
    opacity: 0.9;
}

.cert-actions {
    margin-top: 1.5rem;
}

.cert-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-color), #2980b9);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.cert-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
    background: linear-gradient(135deg, #2980b9, var(--accent-color));
}

.cert-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

.cert-badge-container:hover .credly-embed {
    transform: scale(1.05);
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s ease;
}

.cert-card:hover::before {
    left: 100%;
}

@media (max-width: 768px) {
    .certifications-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 1rem;
    }
    
    .cert-card {
        max-width: 400px;
        margin: 0 auto;
    }
    


/* Enhanced Skills Styles */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.skill-item {
    background: var(--secondary-bg-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.2);
}

.skill-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    min-width: 60px;
    text-align: center;
}

.skill-content {
    flex: 1;
}

.skill-content h3 {
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: rgba(52, 152, 219, 0.2);
    border-radius: 4px;
    margin: 0.5rem 0;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #2980b9);
    border-radius: 4px;
    width: 0;
    transition: width 2s ease-in-out;
}

.skill-progress.animated {
    animation: none;
}

@keyframes fillProgress {
    from {
        width: 0;
    }
    to {
        width: var(--progress-width);
    }
}

/* Enhanced Portfolio Styles */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.portfolio-item {
    background: var(--secondary-bg-color);
    border-radius: 15px;
    padding: 2rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

.project-icon {
    font-size: 3rem;
    color: var(--accent-color);
    text-align: center;
    margin-bottom: 1.5rem;
}

.project-content h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

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

.tech-tag {
    background: var(--accent-color);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-color), #2980b9);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.project-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
    background: linear-gradient(135deg, #2980b9, var(--accent-color));
}

/* Enhanced About Styles */
.about-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 0;
}

.about-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.intro-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    opacity: 0.9;
}

.about-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.detail-card {
    background: var(--secondary-bg-color);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
}

.detail-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.2);
}

.detail-icon {
    font-size: 2rem;
    color: var(--accent-color);
    min-width: 50px;
}

.detail-content h3 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.contact-section {
    background: var(--secondary-bg-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
}

.contact-section h3 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: var(--accent-color);
    color: white;
    transform: scale(1.05);
}

/* Fade-in animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Pulse animation for icons */
.skill-icon i,
.project-icon i,
.detail-icon i {
    transition: all 0.3s ease;
}

.skill-item:hover .skill-icon i,
.portfolio-item:hover .project-icon i,
.detail-card:hover .detail-icon i {
    transform: scale(1.2);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1.2); }
    50% { transform: scale(1.3); }
}

/* Contact item link styling */
.contact-item {
    text-decoration: none;
    color: inherit;
}

/* Ensure proper spacing on all devices */
@media (max-width: 600px) {
    .detail-card {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .detail-icon {
        align-self: center;
    }
    
    .contact-item span {
        font-size: 0.9rem;
        word-break: break-word;
    }
    
    .tech-stack {
        gap: 0.3rem;
    }
    
    .project-content h3,
    .cert-content h3,
    .detail-content h3 {
        font-size: 1.2rem;
    }
}

/* Responsive Design */

/* Tablet styles */
@media (max-width: 1024px) {
    .page-container {
        padding: 2.5rem 1.5rem;
        margin: 1.5rem 1rem;
    }
    
    .skills-container,
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .about-details {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem 0;
    }
    
    .hero-content {
        margin-right: 0;
        margin-bottom: 2rem;
    }
    
    .credly-embed {
        width: 200px;
        height: 250px;
    }
    
    .certifications-container {
        grid-template-columns: 1fr;
        max-width: 500px;
        gap: 2rem;
    }
    
    .skills-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-details {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Desktop navigation - ensure it always works */
@media (min-width: 769px) {
    .nav-toggle {
        display: none !important;
    }
    
    .nav-menu {
        display: flex !important;
        position: static !important;
        flex-direction: row !important;
        background: none !important;
        width: auto !important;
        box-shadow: none !important;
        left: auto !important;
        top: auto !important;
        transform: none !important;
    }
    
    .nav-menu li {
        margin-left: 1.5rem;
        margin: 0 0.75rem;
    }
    
    .nav-menu li a {
        padding: 0.5rem;
        display: inline-block;
        border-bottom: none;
    }
}

@media (min-width: 1024px) {
    .skills-container {
        grid-template-columns: repeat(2, 1fr);
        max-width: 1200px;
        gap: 3rem;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 1000px;
        gap: 4rem;
    }
    
    .certifications-container {
        grid-template-columns: repeat(2, 1fr);
        max-width: 900px;
        gap: 4rem;
    }
    
    .about-details {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1200px;
    }
}

@media (min-width: 1400px) {
    .skills-container {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1400px;
    }
    
    .about-details {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1400px;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 0;
        flex-direction: column;
        background-color: var(--secondary-bg-color);
        width: 100%;
        height: 100vh;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        z-index: 1000;
        padding-top: 80px;
        justify-content: flex-start;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 0;
        width: 100%;
    }
    
    .nav-menu li a {
        padding: 1.5rem 2rem;
        display: block;
        border-bottom: 1px solid rgba(52, 152, 219, 0.1);
        width: 100%;
        font-size: 1.1rem;
    }
    
    nav {
        padding: 1rem;
        background-color: var(--secondary-bg-color);
        position: relative;
        z-index: 1001;
    }
    
    .theme-toggle {
        position: relative;
        z-index: 1002;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .skills-container,
    .portfolio-grid,
    .about-details {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 1rem;
    }
    
    .skill-item {
        flex-direction: row;
        text-align: left;
        padding: 1.5rem;
    }
    
    .cert-card,
    .portfolio-item,
    .detail-card {
        padding: 1.5rem;
    }
    
    .page-container {
        padding: 2rem 1rem;
        margin: 1rem 0.5rem;
    }
    
    .credly-embed {
        width: 200px;
        height: 250px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    main {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }
    
    nav {
        padding: 0.8rem 1rem;
    }
    
    .nav-menu li a {
        font-size: 1rem;
        padding: 1.2rem 1.5rem;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .hero-content {
        padding: 0 0.5rem;
    }
    
    .hero-image {
        max-width: 150px;
    }
    
    .skill-item {
        flex-direction: column;
        text-align: center;
        padding: 1.2rem;
    }
    
    .cert-card,
    .portfolio-item,
    .detail-card {
        padding: 1.2rem;
    }
    
    .page-container {
        margin: 0.5rem;
        padding: 1.5rem 1rem;
    }
    
    .credly-embed {
        width: 180px;
        height: 220px;
    }
    
    .tech-stack {
        justify-content: center;
    }
    
    .tech-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.7rem;
    }
    
    .project-btn,
    .cert-link {
        padding: 0.7rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .contact-section {
        padding: 1.2rem;
    }
    
    .contact-item {
        padding: 1rem;
        font-size: 0.9rem;
    }
    
    .social-links a {
        font-size: 1.8rem;
        margin: 0 0.8rem;
    }
}

@media (max-width: 320px) {
    .logo {
        font-size: 1rem;
    }
    
    h1 {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    .page-container {
        margin: 0.25rem;
        padding: 1rem 0.75rem;
    }
    
    .credly-embed {
        width: 160px;
        height: 200px;
    }
    
    .skill-icon {
        font-size: 2rem;
    }
    
    .project-icon {
        font-size: 2.5rem;
    }
    
    .hero-content h1 {
        font-size: 1.4rem;
    }
    
    .hero-image {
        max-width: 140px;
    }
}