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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
    overflow-x: hidden;
    transition: all 0.3s ease;
}

/* Dark Theme */
body.dark-theme {
    background-color: #0f172a;
    color: #e2e8f0;
}

body.dark-theme .navbar {
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-theme .nav-link {
    color: #e2e8f0;
}

body.dark-theme .hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

body.dark-theme .about {
    background: #1e293b;
}

body.dark-theme .certificates {
    background: #1e293b;
}

body.dark-theme .project-card,
body.dark-theme .certificate-card,
body.dark-theme .contact-card {
    background: #334155;
    border: 1px solid #475569;
}

body.dark-theme .section-title {
    color: #e2e8f0;
}

body.dark-theme .footer {
    background: #020617;
}

body.dark-theme .skill-name {
    color: #e2e8f0;
}

body.dark-theme .form-group input,
body.dark-theme .form-group textarea {
    background: #334155;
    border-color: #475569;
    color: #e2e8f0;
}

body.dark-theme .nav-menu {
    background: #0f172a;
}

body.dark-theme .hamburger .bar {
    background: #e2e8f0;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
    color: white;
}

.loader-text {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    animation: pulse 2s infinite;
}

.loader-bar {
    width: 300px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    overflow: hidden;
}

.loader-progress {
    height: 100%;
    background: white;
    border-radius: 2px;
    animation: loading 3s ease-in-out;
}

@keyframes loading {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: #2563eb;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.theme-toggle:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #2563eb;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
}

.nav-logo a {
    font-size: 24px;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-logo a:hover {
    color: #1d4ed8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    padding-top: 70px;
    overflow: hidden;
}

/* Hero Background Animation */
.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.floating-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    background: linear-gradient(45deg, rgba(37, 99, 235, 0.1), rgba(29, 78, 216, 0.1));
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 120px;
    height: 120px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.shape-3 {
    width: 60px;
    height: 60px;
    top: 80%;
    left: 20%;
    animation-delay: 4s;
}

.shape-4 {
    width: 100px;
    height: 100px;
    top: 30%;
    right: 30%;
    animation-delay: 1s;
}

.shape-5 {
    width: 40px;
    height: 40px;
    top: 10%;
    right: 50%;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

.hero-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1e293b;
    line-height: 1.1;
}

.highlight {
    color: #2563eb;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #64748b;
    margin-bottom: 1rem;
    font-weight: 500;
}

.hero-tagline {
    font-size: 1.1rem;
    color: #475569;
    margin-bottom: 2rem;
    font-style: italic;
}

/* Typing Animation */
.typing-text::after {
    content: '|';
    animation: blink 1s infinite;
    animation-delay: 1s;
}

.typing-tagline::after {
    content: '|';
    animation: blink 1s infinite;
    animation-delay: 3s;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.social-links {
    display: flex;
    gap: 15px;
    margin-bottom: 2rem;
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    color: #64748b;
    text-decoration: none;
    border-radius: 50%;
    transition: all 0.3s ease;
    font-size: 1.2rem;
}

.social-link:hover {
    background: #2563eb;
    color: white;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 14px 28px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-secondary:hover {
    background: #2563eb;
    color: white;
    transform: translateY(-2px);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.profile-placeholder {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 4px solid #2563eb;
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.1);
    transition: all 0.3s ease;
    position: relative;
    background: none;
}

.profile-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.profile-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(37, 99, 235, 0.3), transparent);
    animation: rotate 4s linear infinite;
    z-index: -1;
}

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

.profile-placeholder:hover {
    transform: scale(1.05);
    box-shadow: 0 25px 50px rgba(37, 99, 235, 0.2);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-arrow {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Section Styles */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #64748b;
}

/* About Section */
.about {
    background: #f8fafc;
}

.about-content {
    display: grid;
    gap: 60px;
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #475569;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.education h3, .skills h3 {
    font-size: 1.5rem;
    color: #1e293b;
    margin-bottom: 2rem;
    font-weight: 600;
}

.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e2e8f0;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 60px;
}

.timeline-marker {
    position: absolute;
    left: 11px;
    top: 0;
    width: 18px;
    height: 18px;
    background: #2563eb;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 4px #e2e8f0;
}

.timeline-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.timeline-period {
    color: #2563eb;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.timeline-institution {
    color: #64748b;
    margin-bottom: 0.5rem;
}

.timeline-grade {
    color: #059669;
    font-weight: 500;
}

/* Skills Section */
.skill-name {
    margin-top: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #475569;
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 25px;
    justify-items: center;
}

.skill-item {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 2px solid #e2e8f0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.skill-item i,
.skill-item svg {
    font-size: 2.2rem;
    background: linear-gradient(135deg, #3b82f6, #06b6d4, #10b981);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: transform 0.3s ease;
}

.skill-item svg {
    width: 2.2rem;
    height: 2.2rem;
}

.skill-item:hover i,
.skill-item:hover svg {
    transform: scale(1.15) rotate(5deg);
}

.skill-item:hover {
    border-color: transparent;
    box-shadow: 0 12px 25px rgba(37, 99, 235, 0.25);
    transform: translateY(-5px);
}

.skill-item::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(16,185,129,0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.skill-item:hover::before {
    opacity: 1;
}

/* Projects Section */
.project-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid #2563eb;
    background: transparent;
    color: #2563eb;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-family: inherit;
}

.filter-btn.active,
.filter-btn:hover {
    background: #2563eb;
    color: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.project-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.1), transparent);
    transition: left 0.5s ease;
}

.project-card:hover::before {
    left: 100%;
}

.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.project-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1e293b;
    line-height: 1.3;
    flex: 1;
}

.project-status {
    background: #059669;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-left: 15px;
}

.project-status.in-progress {
    background: #f59e0b;
}

.project-description {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: #f1f5f9;
    color: #2563eb;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 15px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.project-link:hover {
    color: #1d4ed8;
}

/* Certificates Section */
.certificates {
    background: #f8fafc;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    justify-items: center;
}

.certificate-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    position: relative;
    overflow: hidden;
    max-width: 320px;
    text-align: center;
}

.certificate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.1), transparent);
    transition: left 0.5s ease;
}

.certificate-card:hover::before {
    left: 100%;
}

.certificate-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.certificate-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    background: #f8fafc;
    padding: 10px;
    border-radius: 12px;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    margin-bottom: 1.5rem;
}

.certificate-card:hover .certificate-img {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.certificate-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.certificate-date {
    color: #2563eb;
    font-weight: 500;
    margin-bottom: 1rem;
}

.certificate-issuer {
    color: #64748b;
    margin-bottom: 1.5rem;
}

.certificate-guide {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.9rem;
}

.certificate-guide a {
    color: #2563eb;
    text-decoration: none;
}

.certificate-guide a:hover {
    text-decoration: underline;
}

.certificate-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.certificate-link:hover {
    color: #1d4ed8;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: #2563eb;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.contact-details a {
    color: #64748b;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-details a:hover {
    color: #2563eb;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: #1e293b;
    color: white;
    padding: 40px 0;
}

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

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

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

/* Cursor Trail */
.cursor-trail {
    position: fixed;
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.8), transparent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.1s ease;
}

/* Particles Background */
.particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: rgba(37, 99, 235, 0.3);
    border-radius: 50%;
    animation: particleFloat 10s linear infinite;
}

@keyframes particleFloat {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

/* Section Animations */
.section-hidden {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    animation: fadeInUp 0.6s ease forwards;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    /* Mobile Hero Layout - Image First, Text Second */
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    /* Change order for mobile - image first */
    .hero-image {
        order: 1;
        margin-bottom: 20px;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .about-details {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-placeholder {
        width: 250px;
        height: 250px;
    }
    
    .project-filter {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    .theme-toggle {
        right: 15px;
        width: 45px;
        height: 45px;
    }
    
    .back-to-top {
        right: 15px;
        bottom: 20px;
        width: 45px;
        height: 45px;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .project-card,
    .certificate-card {
        padding: 25px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    
    .skill-item {
        width: 100px;
        height: 100px;
    }
    
    .certificate-card {
        max-width: 280px;
    }
    
    .profile-placeholder {
        width: 200px;
        height: 200px;
    }
    
    .social-links {
        gap: 10px;
    }
    
    .social-link {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
}