:root {
    --primary: #4a6cf7;
    --secondary: #6a75f9;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --light-gray: #e2e8f0;
    --border-radius: 12px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

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

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
    transition: var(--transition);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

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

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary);
}

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

nav ul li a:hover:after,
nav ul li a.active:after {
    width: 100%;
}

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

/* Blog Hero Section */
.blog-hero {
    padding: 50px 0 50px;
    background: linear-gradient(135deg, #4a6cf7 0%, #6a75f9 100%);
    color: white;
    text-align: center;
    margin-top: 86px;  /* Adjust for fixed header */
}

.blog-hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.blog-hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    color: rgba(255, 255, 255, 0.9);
}

/* Blog Content */
.blog-content {
    padding: 100px 0;
    background: #f8fafc;
}

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

.blog-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    gap: 15px;
}

.blog-tab-btn {
    padding: 12px 30px;
    background: transparent;
    border: 2px solid var(--light-gray);
    color: var(--gray);
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.blog-tab-btn:hover {
    background: var(--light-gray);
}

.blog-tab-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(74, 108, 247, 0.25);
}

.blog-tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.blog-tab-content.active {
    display: block;
}

.blog-filters {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    gap: 20px;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 12px 50px 12px 20px;
    border: 2px solid var(--light-gray);
    border-radius: 50px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary);
    outline: none;
}

.search-box button {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 1.2rem;
}

.category-filter {
    min-width: 250px;
}

.category-filter select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--light-gray);
    border-radius: 50px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

.category-filter select:focus {
    border-color: var(--primary);
    outline: none;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

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

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.blog-header {
    height: 200px;
    background: var(--light-gray);
    position: relative;
    overflow: hidden;
}

.blog-header .blog-category {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary);
    color: white;
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 2;
}

.blog-header .blog-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: var(--transition);
}

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

.blog-body {
    padding: 10px;
}

.blog-date {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.blog-date i {
    margin-right: 8px;
    color: var(--primary);
}

.blog-title {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.blog-excerpt {
    margin-bottom: 20px;
    color: var(--gray);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.blog-tag {
    background: rgba(74, 108, 247, 0.1);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
}

.blog-author {
    display: flex;
    align-items: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--light-gray);
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    color: var(--primary);
}

.author-name {
    font-weight: 500;
    color: var(--dark);
}

.read-more {
    display: inline-block;
    margin-top: 15px;
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--secondary);
}

/* Blog Form */
.blog-form {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

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

.form-group textarea {
    min-height: 200px;
    resize: vertical;
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(74, 108, 247, 0.25);
}

.btn:hover {
    background: var(--secondary);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(74, 108, 247, 0.35);
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: white;
    margin-bottom: 25px;
    font-size: 1.4rem;
    position: relative;
    padding-bottom: 15px;
}

.footer-col h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
}

.footer-col p {
    color: var(--light-gray);
    margin-bottom: 20px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary);
    transform: translateY(-5px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    text-decoration: none;
    color: var(--light-gray);
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.footer-links a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-links a i {
    margin-right: 10px;
    font-size: 0.9rem;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light-gray);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive Design */
@media (max-width: 992px) {
    .blog-hero h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    header {
        padding: 15px 0;
    }
    
    nav ul {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    section {
        padding: 70px 0;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .blog-filters {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .blog-hero h1 {
        font-size: 2.2rem;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-tabs {
        flex-direction: column;
    }
}


/* Responsive Design */
@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    .hero-content, .about-container, .skills-container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text p {
        margin: 0 auto 30px;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .about-text h2:after, .skills-text h2:after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    /* # hemberger menu */
    nav ul {
        display: none;
        flex-direction: column;
        background: #fff;
        position: absolute;
        top: 70px; /* adjust based on header height */
        right: 0;
        width: 50vw;
        height: calc(100vh - 70px); /* Full device height minus header */
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        z-index: 1001;
        padding-top: 30px;
        align-items: start;
        justify-content: flex-start;
        opacity: 0;
        pointer-events: none;
        transform: translateY(-20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }
    nav ul.open {
        display: flex;
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }
    nav ul.closing {
        opacity: 0;
        pointer-events: none;
        transform: translateY(-20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
        display: flex; /* Keep flex during animation */
    }
    .mobile-menu-btn {
        display: block;
    }
}

@media (max-width: 768px) {
    header {
        padding: 15px 0;
    }
    
    nav ul {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    section {
        padding: 70px 0;
    }
    
    .skills-container {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .project-img {
        height: 180px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-container {
        flex-direction: column;
    }
}

.close-menu-btn {
    display: none;
    position: absolute;
    top: 20px;
    right: 25px;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--dark);
    z-index: 1100;
    cursor: pointer;
}

.close-menu-btn.show {
    display: block;
}

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

@media (max-width: 992px) {
    nav ul.open + .close-menu-btn {
        display: block;
    }
}