/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --gray: #666;
    --border-color: #ddd;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

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

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

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

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

.nav-link:hover {
    color: var(--secondary-color);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 150px 20px 100px;
    text-align: center;
    margin-top: 60px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.social-links a {
    color: var(--white);
    font-size: 1.5rem;
    transition: transform 0.3s, opacity 0.3s;
}

.social-links a:hover {
    transform: translateY(-3px);
    opacity: 0.8;
}

.cta-button {
    display: inline-block;
    background: var(--white);
    color: var(--primary-color);
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--secondary-color);
    margin: 1rem auto;
}

/* About Section */
.about {
    padding: 80px 20px;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--gray);
}

.skills {
    margin-top: 2rem;
}

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

.skills-hint {
    font-size: 0.8rem;
    color: var(--gray);
    font-weight: normal;
    font-style: italic;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    position: relative;
    background: var(--light-bg);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    cursor: help;
    transition: all 0.3s;
    display: inline-block;
}

.skill-tag:hover {
    background: var(--secondary-color);
    color: var(--white);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* Tooltip */
.skill-tag::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background: var(--primary-color);
    color: var(--white);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    white-space: normal;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    max-width: 300px;
    text-align: center;
    line-height: 1.4;
}

.skill-tag::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--primary-color);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 1000;
}

.skill-tag:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

.skill-tag:hover::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Experience Section */
.experience {
    padding: 80px 20px;
    background: var(--light-bg);
}

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

.experience-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    border: 2px solid transparent;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.experience-card:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    transform: translateY(-5px);
}

.experience-icon {
    width: 60px;
    height: 60px;
    background: var(--secondary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.experience-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.experience-card p {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.experience-highlights {
    list-style: none;
    padding: 0;
}

.experience-highlights li {
    color: var(--text-color);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.experience-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* Highlight effect when linked to */
.experience-card:target {
    border-color: var(--secondary-color);
    background: var(--white);
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.2);
    animation: highlight 1s ease-in-out;
}

@keyframes highlight {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* Projects Section */
.projects {
    padding: 80px 20px;
    background: var(--white);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--white);
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 10px 25px;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--secondary-color);
    color: var(--white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.project-image {
    height: 250px;
    overflow: hidden;
    background: var(--light-bg);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.project-category {
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-info p {
    color: var(--gray);
    margin-bottom: 1rem;
}

.project-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s;
}

.project-link:hover {
    gap: 1rem;
}

/* Gallery Section */
.gallery {
    padding: 80px 20px;
    background: var(--light-bg);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    height: 300px;
    overflow: hidden;
    border-radius: 10px;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.6) 50%, rgba(0,0,0,0) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none; /* Allow clicks to pass through to gallery-item */
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-overlay-text {
    text-align: center;
    color: var(--white);
    margin-bottom: 10px;
}

.gallery-overlay-text h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.gallery-overlay-text p {
    font-size: 0.9rem;
    opacity: 0.95;
    line-height: 1.4;
}

.gallery-overlay i {
    font-size: 2rem;
    color: var(--white);
}

/* Contact Section */
.contact {
    padding: 80px 20px;
    background: var(--white);
}

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

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-info p {
    margin-bottom: 2rem;
    color: var(--gray);
    line-height: 1.8;
}

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

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

.contact-item i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

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

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

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

.social-links-contact a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    transition: transform 0.3s, background 0.3s;
}

.social-links-contact a:hover {
    transform: translateY(-3px);
    background: var(--primary-color);
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.submit-btn {
    background: var(--secondary-color);
    color: var(--white);
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
}

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

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 2rem 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

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

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

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

    .contact-content {
        grid-template-columns: 1fr;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .experience-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 2rem;
    }

    .filter-buttons {
        flex-direction: column;
    }

    .filter-btn {
        width: 100%;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Hidden class for filtering */
.project-card.hidden {
    display: none;
}

/* Lightbox Styles */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    overflow: auto;
}

.lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    position: relative;
    max-width: 95%;
    max-height: 95vh;
    margin: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 5px;
    box-shadow: 0 10px 50px rgba(0,0,0,0.5);
}

.lightbox-caption {
    display: none; /* Hidden by default - no captions */
    background: var(--white);
    padding: 1.5rem;
    margin-top: 1rem;
    border-radius: 5px;
    max-width: 600px;
    text-align: center;
}

.lightbox-caption h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.lightbox-caption p {
    color: var(--gray);
    line-height: 1.6;
    margin: 0;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: var(--white);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10000;
    transition: color 0.3s;
}

.lightbox-close:hover {
    color: var(--secondary-color);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: none;
    font-size: 30px;
    padding: 16px 20px;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s;
    z-index: 10000;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--secondary-color);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

/* Skill Hover Cards (for about.html and experience.html) */
.skills-hover-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 2rem;
}

.skill-hover-card {
    position: relative;
    height: 200px;
    perspective: 1000px;
    cursor: pointer;
}

.skill-front,
.skill-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    transition: transform 0.6s;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.skill-front {
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    z-index: 2;
    transform: rotateY(0deg);
}

.skill-front i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.skill-front h4 {
    color: var(--primary-color);
    font-size: 1rem;
    margin: 0;
}

.skill-back {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    transform: rotateY(180deg);
}

.skill-back h4 {
    font-size: 1rem;
    margin-bottom: 10px;
    border-bottom: 2px solid var(--white);
    padding-bottom: 8px;
}

.skill-back p {
    font-size: 0.85rem;
    line-height: 1.4;
    margin-bottom: 10px;
}

.skill-back ul {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.8rem;
}

.skill-back ul li {
    margin: 4px 0;
}

.skill-back ul li::before {
    content: "✓ ";
    font-weight: bold;
}

.skill-hover-card:hover .skill-front {
    transform: rotateY(-180deg);
}

.skill-hover-card:hover .skill-back {
    transform: rotateY(0deg);
}

@media (max-width: 768px) {
    .skills-hover-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .skill-hover-card {
        height: 180px;
    }
    
    .skill-front i {
        font-size: 2rem;
    }
    
    .skill-front h4,
    .skill-back h4 {
        font-size: 0.9rem;
    }
    
    .skill-back p {
        font-size: 0.75rem;
    }
}

/* Lightbox Mobile Styles */
@media (max-width: 768px) {
    .lightbox-content {
        max-width: 95%;
    }
    
    .lightbox-content img {
        max-height: 60vh;
    }
    
    .lightbox-close {
        top: 10px;
        right: 20px;
        font-size: 30px;
    }
    
    .lightbox-prev,
    .lightbox-next {
        font-size: 20px;
        padding: 10px 15px;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
    
    .lightbox-caption {
        padding: 1rem;
        margin-top: 0.5rem;
    }
    
    .lightbox-caption h3 {
        font-size: 1.2rem;
    }
}

/* Simple Gallery Grid (No Lightbox) */
.simple-gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.simple-gallery-item {
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.simple-gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.simple-gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
}

@media (max-width: 768px) {
    .simple-gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 15px;
    }
    
    .simple-gallery-item img {
        height: 250px;
    }
}