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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

img {
    max-width: 100%;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    position: relative;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    border-radius: var(--radius-full);
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -10px rgba(37, 99, 235, 0.6);
}

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

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

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo span {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--text-color);
    font-weight: 600;
    position: relative;
}

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

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

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    margin-left: var(--spacing-sm);
}

.theme-toggle:hover {
    color: var(--primary-color);
    transform: rotate(30deg);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 650px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.typewriter {
    color: var(--primary-color);
    font-weight: 700;
    border-right: 2px solid;
    white-space: nowrap;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.hero-btns {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.hero-img {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    max-width: 500px;
    z-index: 1;
    opacity: 0.9;
}

/* Skills Section */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.skill-category {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.skill-item {
    margin-bottom: var(--spacing-sm);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.skill-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    position: relative;
    width: 0;
    transition: width 1.5s ease;
}

/* Projects Section */
.projects-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.filter-btn {
    padding: 0.5rem 1.2rem;
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    transform-style: preserve-3d;
    perspective: 1000px;
}

.project-card:hover {
    transform: translateY(-10px) rotateX(5deg) rotateY(5deg);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.2);
}

.project-img {
    height: 200px;
    width: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-img {
    transform: scale(1.05);
}

.project-content {
    padding: var(--spacing-md);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: var(--spacing-sm) 0;
}

.project-tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
}

.project-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

/* Experience Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--border-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: var(--spacing-md);
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 50px;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 50px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 20px;
    background: var(--card-bg);
    border: 3px solid var(--primary-color);
    border-radius: var(--radius-full);
    transform: translateY(-50%);
}

.timeline-item:nth-child(odd)::after {
    right: -10px;
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-content {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.contact-form {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-color);
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Footer */
footer {
    background: var(--card-bg);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

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

/* Responsive Design */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-img {
        width: 40%;
        opacity: 0.7;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-item:nth-child(odd) {
        left: 0;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-item:nth-child(even) {
        left: 0;
    }
    
    .timeline-item::after {
        left: 20px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-md);
        gap: var(--spacing-md);
        transform: translateY(-150%);
        transition: var(--transition);
        box-shadow: var(--shadow);
    }
    
    .nav-links.active {
        transform: translateY(0);
    }
    
    .hero {
        text-align: center;
    }
    
    .hero-content {
        margin: 0 auto;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-img {
        display: none;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: 0.6rem 1.4rem;
    }
}


/* About Page Styles */
.about-hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    text-align: center;
}

.about-header .section-title {
    color: white;
}

.about-header .section-title::after {
    background: white;
}

.bio-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.bio-image .image-frame {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.bio-image img {
    width: 100%;
    height: auto;
    transition: var(--transition);
}

.bio-image img:hover {
    transform: scale(1.05);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

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

.skill-list li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: 1.5rem;
}

.skill-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.certifications {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.cert-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.cert-card:hover {
    transform: translateY(-5px);
}

.cert-icon {
    width: 60px;
    height: 60px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-size: 1.5rem;
    color: var(--primary-color);
}

.institution {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-xs);
}

.year {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Blog Page Styles */
.blog-hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: white;
    text-align: center;
}

.blog-header .section-title {
    color: white;
}

.blog-header .section-title::after {
    background: white;
}

.filters-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    background: var(--card-bg);
    color: var(--text-color);
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.tags-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag-btn {
    padding: 0.5rem 1.2rem;
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.tag-btn.active,
.tag-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.blog-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px -10px rgba(0, 0, 0, 0.15);
}

.post-image {
    height: 200px;
    overflow: hidden;
}

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

.blog-card:hover .post-image img {
    transform: scale(1.05);
}

.post-content {
    padding: var(--spacing-md);
}

.post-meta {
    display: flex;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.post-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.post-excerpt {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.post-tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
}

.skeleton-post {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.skeleton-img {
    height: 200px;
    background: var(--border-color);
}

.skeleton-content {
    padding: var(--spacing-md);
}

.skeleton-title {
    height: 24px;
    width: 80%;
    background: var(--border-color);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.skeleton-excerpt {
    height: 16px;
    width: 100%;
    background: var(--border-color);
    margin-bottom: 8px;
    border-radius: var(--radius-sm);
}

.skeleton-meta {
    height: 14px;
    width: 60%;
    background: var(--border-color);
    margin-top: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

/* Contact Page Styles */
.contact-hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    text-align: center;
}

.contact-header .section-title {
    color: white;
}

.contact-header .section-title::after {
    background: white;
}

.contact-link {
    display: inline-block;
    margin-top: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 600;
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.contact-form h2 {
    margin-bottom: var(--spacing-md);
}

.form-message {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.form-message.success {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.map-container {
    height: 400px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: var(--spacing-md);
}

#map {
    height: 100%;
}

.cta-box {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow);
    margin: var(--spacing-xl) 0;
}

.cta-box h2 {
    margin-bottom: var(--spacing-sm);
}

.cta-box p {
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-secondary);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .bio-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .bio-image {
        order: -1;
    }
    
    .filters-container {
        flex-direction: column;
    }
    
    .search-box {
        max-width: 100%;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}