/* Responsive Design */
@media (max-width: 1024px) {
    .tutorials-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-content {
        flex-direction: column;
        text-align: center;
    }
    
    .newsletter-form {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .tutorials-hero {
        padding: 8rem 1rem 3rem;
    }
    
    .filter-buttons {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .tutorials-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .upload-form-container {
        padding: 2rem 1.5rem;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 5rem 1rem 2rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 0.95rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .profile-card {
        width: 240px;
        height: 240px;
    }
    
    .profile-ring {
        top: -12px;
        left: -12px;
        right: -12px;
        bottom: -12px;
        border-width: 2px;
    }
    
    .profile-ring-2 {
        top: -24px;
        left: -24px;
        right: -24px;
        bottom: -24px;
        border-width: 2px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .section-label {
        font-size: 0.8rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: 1.2rem;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .stat-card h3 {
        font-size: 1.5rem;
    }
    
    .about-content-box {
        padding: 1.5rem;
    }
    
    .about-text {
        font-size: 1rem;
    }
    
    .timeline-item {
        padding-left: 40px;
        margin-bottom: 2rem;
    }
    
    .timeline-content {
        padding: 1.2rem;
    }
    
    .timeline-content h3 {
        font-size: 1.2rem;
    }
    
    .timeline-content h4 {
        font-size: 1rem;
    }
    
    .timeline-date {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
    }
    
    .skill-category {
        padding: 1.5rem;
    }
    
    .skill-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .skill-category h3 {
        font-size: 1.3rem;
    }
    
    .skill-tag {
        font-size: 0.85rem;
        padding: 0.5rem 1rem;
    }
    
    .project-info,
    .cert-card {
        padding: 1.2rem;
    }
    
    .project-info h3,
    .cert-card h3 {
        font-size: 1.1rem;
    }
    
    .contact-card {
        padding: 2rem 1.5rem;
    }
    
    .contact-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .social-icon {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .newsletter-content {
        padding: 0 1rem;
    }
    
    .newsletter-text h2 {
        font-size: 1.5rem;
    }
    
    .newsletter-text p {
        font-size: 1rem;
    }
    
    /* Tutorials Page Mobile */
    .tutorial-thumbnail {
        height: 180px;
    }
    
    .filter-btn {
        font-size: 0.85rem;
        padding: 0.5rem 0.8rem;
    }
    
    .tutorial-content {
        padding: 1rem;
    }
    
    .tutorial-content h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 375px) {
    .nav-container {
        padding: 1rem 1rem;
    }
    
    .logo img {
        height: 40px;
    }
    
    .hero-title {
        font-size: 1.6rem;
    }
    
    .profile-card {
        width: 220px;
        height: 220px;
    }
    
    .btn {
        padding: 0.7rem 1.2rem;
        font-size: 0.85rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
}/* Modern Portfolio CSS */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* Animated Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0.03;
}

.cube {
    position: absolute;
    width: 100px;
    height: 100px;
    border: 2px solid var(--primary-color);
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
}

.cube:nth-child(1) { top: 10%; left: 20%; animation-delay: 0s; }
.cube:nth-child(2) { top: 70%; left: 80%; animation-delay: 4s; }
.cube:nth-child(3) { top: 40%; left: 60%; animation-delay: 8s; }
.cube:nth-child(4) { top: 80%; left: 10%; animation-delay: 12s; }
.cube:nth-child(5) { top: 20%; left: 90%; animation-delay: 16s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-50px) rotate(180deg); }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 3px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem;
    position: relative;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hello-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

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

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

.hero-socials {
    display: flex;
    gap: 1rem;
}

.social-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-icon:hover {
    background: var(--gradient-1);
    color: white;
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.profile-card {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
    margin-top: 5rem;
}

.profile-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.profile-ring,
.profile-ring-2 {
    position: absolute;
    border-radius: 50%;
    border: 3px solid;
    animation: rotate 20s linear infinite;
}

.profile-ring {
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    border-color: var(--primary-color) transparent var(--primary-color) transparent;
}

.profile-ring-2 {
    top: -40px;
    left: -40px;
    right: -40px;
    bottom: -40px;
    border-color: transparent var(--secondary-color) transparent var(--secondary-color);
    animation-direction: reverse;
    animation-duration: 15s;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.scroll-indicator span {
    width: 3px;
    height: 15px;
    background: var(--primary-color);
    border-radius: 3px;
    animation: scroll 1.5s ease-in-out infinite;
}

.scroll-indicator span:nth-child(2) { animation-delay: 0.2s; }
.scroll-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes scroll {
    0%, 100% { opacity: 0; transform: translateY(-10px); }
    50% { opacity: 1; transform: translateY(0); }
}

/* About Section */
.about {
    padding: 6rem 0;
    background: white;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.stat-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1rem;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.stat-card h3 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: var(--text-secondary);
}

.about-content-box {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    padding: 3rem;
    border-radius: 20px;
    border-left: 4px solid var(--primary-color);
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Experience Section */
.experience {
    padding: 6rem 0;
    background: var(--light-bg);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-1);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    left: 11px;
    top: 0;
    width: 20px;
    height: 20px;
    background: white;
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.timeline-date {
    display: inline-block;
    background: var(--gradient-1);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
}

.timeline-content li i {
    color: var(--primary-color);
    margin-top: 4px;
}

/* Skills Section */
.skills {
    padding: 6rem 0;
    background: white;
}

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

.skill-category {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.skill-category:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.skill-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

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

.skill-tag {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    color: var(--primary-color);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background: var(--gradient-1);
    color: white;
    transform: scale(1.05);
}

/* Certificates Section */
.certificates {
    padding: 6rem 0;
    background: var(--light-bg);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.cert-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.cert-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.cert-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

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

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

.cert-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(102, 126, 234, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cert-card:hover .cert-overlay {
    opacity: 1;
}

.cert-btn {
    background: white;
    color: var(--primary-color);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

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

.cert-card h3 {
    padding: 1.5rem;
    text-align: center;
    color: var(--text-primary);
    font-size: 1.1rem;
}

/* Projects Section */
.projects {
    padding: 6rem 0;
    background: white;
}

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

.project-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
}

.project-tags span {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--primary-color);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.project-info {
    padding: 2rem;
}

.project-info h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-info p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    transition: all 0.3s ease;
}

.project-link:hover {
    background: var(--primary-color);
    color: white;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: var(--light-bg);
}

.contact-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
}

.contact-card h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

.contact-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.contact-card p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.footer-socials a {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.footer-socials a:hover {
    background: var(--gradient-1);
    transform: translateY(-5px);
}

/* Tutorials Page Styles */
.tutorials-hero {
    padding: 10rem 0 4rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    text-align: center;
}

.tutorials-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.tutorials-filter {
    padding: 2rem 0;
    background: white;
    position: sticky;
    top: 70px;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border: 2px solid #e2e8f0;
    background: white;
    color: var(--text-secondary);
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
}

.tutorials-section {
    padding: 4rem 0;
}

.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.tutorial-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    opacity: 1;
    transform: translateY(0);
}

.tutorial-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.tutorial-thumbnail {
    position: relative;
    height: 220px;
    overflow: hidden;
    background: #f1f5f9;
}

.tutorial-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.tutorial-card:hover .tutorial-thumbnail img {
    transform: scale(1.1);
}

.tutorial-duration {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.tutorial-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    opacity: 0;
    transition: all 0.3s ease;
    cursor: pointer;
}

.tutorial-card:hover .tutorial-play {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

.tutorial-content {
    padding: 1.5rem;
}

.tutorial-category {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.tutorial-category.pentesting {
    background: rgba(236, 72, 153, 0.1);
    color: #ec4899;
}

.tutorial-category.web-security {
    background: rgba(139, 92, 246, 0.1);
    color: #8b5cf6;
}

.tutorial-category.tools {
    background: rgba(79, 172, 254, 0.1);
    color: #4facfe;
}

.tutorial-category.programming {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

.tutorial-content h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.tutorial-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.tutorial-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e2e8f0;
}

.tutorial-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

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

.tutorial-link:hover {
    gap: 0.8rem;
}

.load-more-container {
    text-align: center;
}

/* Upload Section */
.upload-section {
    padding: 6rem 0;
    background: var(--light-bg);
}

.upload-form-container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.upload-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label i {
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.8rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.file-upload {
    position: relative;
}

.file-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border: 2px dashed #cbd5e1;
    border-radius: 10px;
    background: var(--light-bg);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.file-upload-label:hover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
}

.file-upload-label i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.file-name {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Newsletter Section */
.newsletter-section {
    padding: 4rem 0;
    background: var(--gradient-1);
}

.newsletter-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.newsletter-text h2 {
    color: white;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.newsletter-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    flex: 1;
    max-width: 500px;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
}

.newsletter-form button {
    white-space: nowrap;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-socials {
        justify-content: center;
    }
    
    .profile-card {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: var(--shadow-lg);
        overflow-y: auto;
        z-index: 999;
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        display: block;
        padding: 1rem;
        font-size: 1.1rem;
        border-radius: 10px;
        transition: all 0.3s ease;
    }
    
    .nav-link:hover,
    .nav-link.active {
        background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero {
        padding: 6rem 1rem 3rem;
        min-height: auto;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
        margin: 0 auto 1.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-socials {
        justify-content: center;
    }
    
    .profile-card {
        width: 280px;
        height: 280px;
    }
    
    .profile-ring {
        top: -15px;
        left: -15px;
        right: -15px;
        bottom: -15px;
    }
    
    .profile-ring-2 {
        top: -30px;
        left: -30px;
        right: -30px;
        bottom: -30px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about {
        padding: 4rem 0;
    }
    
    .about-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1.5rem;
    }
    
    .stat-card {
        padding: 1.5rem;
    }
    
    .stat-icon {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    .about-content-box {
        padding: 2rem;
    }
    
    .timeline::before {
        left: 15px;
    }
    
    .timeline-item {
        padding-left: 50px;
    }
    
    .timeline-dot {
        left: 6px;
        width: 18px;
        height: 18px;
    }
    
    .timeline-content {
        padding: 1.5rem;
    }
    
    .timeline-content h3 {
        font-size: 1.3rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .skill-category {
        padding: 2rem;
    }
    
    .projects-grid,
    .certificates-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}