/* Base Styles */
:root {
    --primary-color: #d32f2f;
    --secondary-color: #f44336;
    --dark-color: #212121;
    --light-color: #f5f5f5;
    --text-color: #333333;
    --text-light: #757575;
    --background-color: #ffffff;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

.dark-theme {
    --primary-color: #f44336;
    --secondary-color: #ff5252;
    --dark-color: #f5f5f5;
    --light-color: #1e1e1e;
    --text-color: #f5f5f5;
    --text-light: #b0b0b0;
    --background-color: #121212;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: background-color 0.5s ease, color 0.5s ease;
}

.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
}

.underline {
    height: 4px;
    width: 70px;
    background-color: var(--primary-color);
    margin: 0 auto;
    transition: width 0.5s ease;
}

.section-header:hover .underline {
    width: 100px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: width 0.3s ease;
    z-index: -1;
}

.btn:hover::before {
    width: 100%;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.secondary-btn {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.secondary-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.highlight {
    color: var(--primary-color);
    font-weight: 600;
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease;
}

.highlight:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* Header Styles */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: all 0.5s ease;
}

.dark-theme header {
    background-color: rgba(18, 18, 18, 0.95);
}

header.scrolled {
    padding: 10px 0;
    background-color: var(--background-color);
    box-shadow: 0 5px 20px var(--shadow-color);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    transition: padding 0.3s ease;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links li a {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease;
}

.nav-links li a:hover {
    color: var(--primary-color);
}

.nav-links li a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.theme-toggle {
    cursor: pointer;
    margin-left: 20px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--light-color);
    color: var(--dark-color);
    transition: all 0.3s ease;
}

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

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger .line {
    width: 25px;
    height: 3px;
    background-color: var(--dark-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 150px 0 100px;
    background: linear-gradient(135deg, var(--light-color) 0%, #e0e0e0 100%);
    overflow: hidden;
    transition: background 0.5s ease;
}

.dark-theme .hero {
    background: linear-gradient(135deg, #1e1e1e 0%, #121212 100%);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark-color);
    animation: fadeInDown 1s ease;
}

.hero-text h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--primary-color);
    animation: fadeInDown 1s ease 0.2s;
    animation-fill-mode: both;
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: var(--text-light);
    max-width: 500px;
    animation: fadeInDown 1s ease 0.4s;
    animation-fill-mode: both;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    animation: fadeInUp 1s ease 0.6s;
    animation-fill-mode: both;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease 0.8s;
    animation-fill-mode: both;
}

.hero-image img {
    width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 50%;
    border: 8px solid white;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: transform 0.5s ease, box-shadow 0.5s ease;
}

.dark-theme .hero-image img {
    border-color: #333;
}

.hero-image img:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: 0 15px 40px var(--shadow-color);
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

/* About Section */
.about {
    padding: 100px 0;
    transition: background-color 0.5s ease;
}

.about-content {
    display: flex;
    gap: 50px;
}

.about-text {
    flex: 2;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.personal-info {
    margin-top: 30px;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    transition: transform 0.3s ease;
}

.info-item:hover {
    transform: translateX(10px);
}

.info-item i {
    width: 30px;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--light-color);
    color: var(--primary-color);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-5px) rotate(360deg);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.about-languages {
    flex: 1;
    background-color: var(--light-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-languages:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px var(--shadow-color);
}

.about-languages h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.language-item {
    margin-bottom: 20px;
}

.language-item span {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.progress-bar {
    height: 10px;
    background-color: rgba(224, 224, 224, 0.5);
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.progress {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 5px;
    position: relative;
    transition: width 1.5s ease-in-out;
}

.progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: progressShine 2s infinite;
}

@keyframes progressShine {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Skills Section */
.skills {
    padding: 100px 0;
    background-color: var(--light-color);
    transition: background-color 0.5s ease;
}

.dark-theme .skills {
    background-color: #1e1e1e;
}

.skill-category {
    margin-bottom: 50px;
}

.skill-category h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    text-align: center;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

.skill-category h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.skill-category:hover h3::after {
    width: 100px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.skill-item {
    background-color: var(--background-color);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.skill-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--primary-color);
    opacity: 0.05;
    transition: height 0.5s ease;
    z-index: -1;
}

.skill-item:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.skill-item:hover::before {
    height: 100%;
}

.skill-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: transform 0.5s ease;
}

.skill-item:hover .skill-icon {
    transform: scale(1.2);
}

.skill-item h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark-color);
    transition: color 0.3s ease;
}

.skill-item:hover h4 {
    color: var(--primary-color);
}

.skill-level {
    display: flex;
    justify-content: center;
    gap: 5px;
}

.level-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #e0e0e0;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.level-dot.filled {
    background-color: var(--primary-color);
}

.skill-item:hover .level-dot.filled {
    transform: scale(1.2);
}

/* Experience Section */
.experience {
    padding: 100px 0;
    transition: background-color 0.5s ease;
}

.tabs {
    max-width: 800px;
    margin: 0 auto;
}

.tab-header {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 30px;
}

.tab-btn {
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    position: relative;
    overflow: hidden;
}

.tab-btn::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease;
}

.tab-btn:hover::before {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::before {
    transform: scaleX(1);
}

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

.tab-pane.active {
    display: block;
}

.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    height: 100%;
    width: 2px;
    background-color: var(--primary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
}

.timeline-dot {
    position: absolute;
    left: -50px;
    top: 0;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: var(--background-color);
    border: 3px solid var(--primary-color);
    z-index: 1;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.2);
    box-shadow: 0 0 0 5px rgba(211, 47, 47, 0.2);
}

.timeline-date {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content {
    background-color: var(--background-color);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:hover .timeline-content {
    transform: translateX(10px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.timeline-content h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.timeline-content p {
    margin-bottom: 15px;
    line-height: 1.7;
}

.project-list h5 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.project-list ul {
    padding-left: 20px;
}

.project-list ul li {
    list-style-type: disc;
    margin-bottom: 5px;
    color: var(--text-light);
    transition: transform 0.3s ease;
}

.project-list ul li:hover {
    transform: translateX(5px);
    color: var(--primary-color);
}

/* Projects Section */
.projects {
    padding: 100px 0;
    background-color: var(--light-color);
    transition: background-color 0.5s ease;
}

.dark-theme .projects {
    background-color: #1e1e1e;
}

.project-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    border: none;
    background-color: var(--background-color);
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px var(--shadow-color);
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--background-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: all 0.5s ease;
    position: relative;
}

.project-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.project-img {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.project-img::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.7) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-card:hover .project-img::after {
    opacity: 1;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.project-info {
    padding: 25px;
}

.project-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--dark-color);
    transition: color 0.3s ease;
}

.project-card:hover .project-info h3 {
    color: var(--primary-color);
}

.project-info p {
    margin-bottom: 15px;
    color: var(--text-light);
    line-height: 1.7;
}

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

.project-tags span {
    padding: 5px 12px;
    background-color: var(--light-color);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.project-card:hover .project-tags span {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.project-btn {
    width: 100%;
    text-align: center;
}

/* Certificates Section */
.certificates {
    padding: 100px 0;
    transition: background-color 0.5s ease;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
}

.certificate-item {
    background-color: var(--background-color);
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.certificate-item::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    width: 0;
    height: 0;
    background-color: var(--primary-color);
    opacity: 0.1;
    border-radius: 50%;
    transition: all 0.5s ease;
    z-index: -1;
}

.certificate-item:hover {
    transform: translateY(-15px) rotate(3deg);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.certificate-item:hover::before {
    width: 200%;
    height: 200%;
}

.certificate-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: transform 0.5s ease;
}

.certificate-item:hover .certificate-icon {
    transform: scale(1.2) rotate(-10deg);
}

.certificate-item h3 {
    font-size: 1.1rem;
    color: var(--dark-color);
    transition: color 0.3s ease;
}

.certificate-item:hover h3 {
    color: var(--primary-color);
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background-color: var(--light-color);
    transition: background-color 0.5s ease;
}

.dark-theme .contact {
    background-color: #1e1e1e;
}

.contact-content {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateX(10px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    color: white;
    font-size: 1.3rem;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
    transform: rotate(360deg);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.contact-details h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.contact-details p {
    color: var(--text-light);
}

.contact-form {
    flex: 1;
    background-color: var(--background-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-form:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-color);
}

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

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

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

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.2);
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 70px 0 20px;
    transition: background-color 0.5s ease;
}

.dark-theme footer {
    background-color: #0a0a0a;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: white;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links h3, .footer-contact h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
    color: white;
}

.footer-links h3::after, .footer-contact h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.footer-links:hover h3::after, .footer-contact:hover h3::after {
    width: 100px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
    position: relative;
    padding-left: 0;
}

.footer-links ul li a::before {
    content: '→';
    position: absolute;
    left: -20px;
    opacity: 0;
    transition: all 0.3s ease;
}

.footer-links ul li a:hover {
    color: white;
    padding-left: 20px;
}

.footer-links ul li a:hover::before {
    left: 0;
    opacity: 1;
}

.footer-contact p {
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    transition: transform 0.3s ease;
}

.footer-contact p:hover {
    transform: translateX(10px);
    color: white;
}

.footer-contact p i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
    }
    
    .hero-text p {
        margin: 0 auto 30px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .contact-content {
        flex-direction: column;
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--background-color);
        flex-direction: column;
        align-items: center;
        padding: 50px 0;
        transition: left 0.3s ease;
        z-index: 999;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active .line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active .line:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .line:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 576px) {
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-text h2 {
        font-size: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .tab-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .timeline {
        padding-left: 30px;
    }
    
    .timeline-dot {
        left: -30px;
        width: 20px;
        height: 20px;
    }
    
    .certificates-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .project-card {
        min-width: 100%;
    }
}