/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    /* Offset built-in anchor scrolling for fixed header */
    scroll-padding-top: calc(var(--header-height, 64px) + 8px);
    -webkit-text-size-adjust: 100%; /* Prevent text scaling on mobile */
}

/* Dynamic layout variables */
:root {
    /* Will be set from JS based on actual navbar height */
    --header-height: 64px;
    --hero-pad-top-extra: 8px;   /* extra breathing space above hero content */
    --hero-pad-bottom: 40px;     /* default bottom padding for hero */
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
    overflow-x: hidden; /* Prevent horizontal scrolling */
    margin: 0;
    padding: 0;
    position: relative;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1001;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding-top: env(safe-area-inset-top, 0);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.8rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
}

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

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

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #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-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    /* Ensure content starts below fixed navbar on all devices */
    padding-top: calc(var(--header-height, 64px) + var(--hero-pad-top-extra, 16px));
    padding-bottom: var(--hero-pad-bottom, 40px);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    /* Fit visible viewport; fallback to vh where svh isn't supported */
    min-height: calc(100vh - var(--header-height, 64px));
    min-height: calc(100svh - var(--header-height, 64px));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    overflow: hidden;
    box-sizing: border-box;
    margin-top: 0;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 10;
    width: 100%;
    margin-top: 0;
    padding-top: 0;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    position: relative;
    z-index: 10;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.highlight {
    color: #fbbf24;
    position: relative;
    z-index: 10;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    position: relative;
    z-index: 10;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-description p {
    margin-bottom: 0.8rem;
    word-wrap: break-word;
    hyphens: none;
}

.hero-description p:last-child {
    margin-bottom: 0;
}

.hero-contact {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.hero-github {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.9;
}

.contact-item i {
    color: #fbbf24;
}

/* Enhanced contact items for better mobile display */
.hero-contact .contact-item,
.hero-github .contact-item {
    transition: all 0.3s ease;
}

.hero-github .contact-item a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

.hero-github .contact-item:hover a {
    color: #fbbf24;
    text-decoration: none;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: #fbbf24;
    color: #1f2937;
}

.btn-primary:hover {
    background-color: #f59e0b;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

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

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #1f2937;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    right: 0;
    width: 100%;
    height: 4px;
    background-color: #2563eb;
    border-radius: 2px;
}

/* About Section */
.about {
    background-color: #f9fafb;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #6b7280;
    line-height: 1.8;
}

.about-intro {
    font-size: 1.2rem !important;
    color: #4b5563 !important;
    font-weight: 400;
}

.about-detail {
    font-size: 1.1rem;
    margin-bottom: 2.5rem !important;
}

.highlight-text {
    color: #2563eb;
    font-weight: 600;
    font-style: normal;
}

.about-content strong {
    color: #1f2937;
    font-weight: 600;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.highlight-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

.highlight-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #2563eb;
}

.highlight-item i {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 0.8rem;
}

.highlight-item span {
    font-size: 0.95rem;
    font-weight: 500;
    color: #1f2937;
    text-align: center;
}

/* Responsive design for highlight items */
@media (max-width: 768px) {
    .about-highlights {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .about-highlights {
        grid-template-columns: 1fr;
        max-width: 300px;
    }
}

/* Timeline Styles */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: #e5e7eb;
    top: 0;
    bottom: 0;
    left: 30px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 80px;
}

.timeline-marker {
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: #2563eb;
    border-radius: 50%;
    left: 21px;
    top: 20px;
}

.timeline-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    font-size: 1.1rem;
    font-weight: 500;
    color: #2563eb;
    margin-bottom: 1rem;
}

.timeline-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.location,
.date {
    font-size: 0.9rem;
    color: #6b7280;
    display: flex;
    align-items: center;
}

.location::before {
    content: '📍';
    margin-right: 0.5rem;
}

.date::before {
    content: '📅';
    margin-right: 0.5rem;
}

.achievement {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #059669;
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: #6b7280;
    line-height: 1.6;
}

/* Education Section */
.education {
    background-color: #f9fafb;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.skill-category h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-category i {
    color: #2563eb;
}

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

.skill-tag {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: transform 0.2s ease;
}

.skill-tag:hover {
    transform: scale(1.05);
}

.language-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.language-certs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.cert-tag {
    background-color: #10b981;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.cert-list {
    color: #6b7280;
}

.cert-list p {
    margin-bottom: 0.5rem;
}

.cert-list ul {
    list-style-type: disc;
    padding-left: 1.5rem;
}

.cert-list li {
    margin-bottom: 0.3rem;
}

/* Certifications Section */
.certifications {
    background-color: #f9fafb;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.cert-item {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.cert-item i {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.cert-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.cert-item p {
    color: #6b7280;
    font-size: 0.9rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e5e7eb;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.project-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.project-header i {
    font-size: 1.5rem;
    color: #2563eb;
}

.project-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1f2937;
}

.project-card p {
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.tag {
    background-color: #eff6ff;
    color: #1e40af;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid #bfdbfe;
}

/* Project Card Links */
.project-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-card-link:hover,
.project-card-link:focus {
    text-decoration: none;
    color: inherit;
}

.project-link-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e5e7eb;
    color: #6b7280;
    font-size: 0.9rem;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.project-card:hover .project-link-indicator {
    opacity: 1;
    transform: translateY(0);
    color: #2563eb;
}

.project-link-indicator i {
    font-size: 1rem;
}

/* Project Subsection Styles */
.subsection {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.subsection-title {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #2563eb;
    text-align: center;
    font-weight: 600;
}

/* Dual link indicator styling */
.project-link-indicator.dual-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.project-link-indicator.dual-links .link-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6b7280;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.3rem 0;
}

.project-link-indicator.dual-links .link-item:hover {
    color: #2563eb;
    transform: translateX(5px);
}

.project-link-indicator.dual-links .link-item i {
    font-size: 1rem;
}

.project-card:hover .project-link-indicator.dual-links {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .subsection {
        margin-top: 3rem;
        padding-top: 1.5rem;
    }
    
    .subsection-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
}

/* Achievements Section */
.achievements {
    background-color: #f9fafb;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.achievement-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.achievement-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.achievement-icon i {
    font-size: 1.5rem;
    color: white;
}

.achievement-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.achievement-card p {
    color: #2563eb;
    font-weight: 500;
    margin-bottom: 1rem;
}

.achievement-desc {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact .contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact .contact-item i {
    font-size: 1.2rem;
    color: #2563eb;
    margin-top: 0.2rem;
}

.contact .contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.contact .contact-item p {
    color: #6b7280;
}

.contact .contact-item a {
    color: #2563eb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact .contact-item a:hover {
    color: #1e40af;
}

/* Contact Form */
.contact-form {
    background: #f9fafb;
    padding: 2rem;
    border-radius: 12px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 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);
}

.contact-form .btn {
    width: 100%;
    padding: 14px;
    background-color: #2563eb;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
}

.contact-form .btn:hover {
    background-color: #1e40af;
}

/* Footer */
.footer {
    background-color: #1f2937;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        padding: 0.5rem 0;
    }

    .nav-container {
        padding: 0.5rem 20px;
    }

    .nav-logo a {
        font-size: 1.3rem;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 50px;
        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: 1.5rem 0;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .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);
    }

    .hero {
        /* Use dynamic header height and keep spacing consistent */
        padding-top: calc(var(--header-height, 64px) + var(--hero-pad-top-extra, 16px));
        padding-bottom: var(--hero-pad-bottom, 40px);
        min-height: calc(100vh - var(--header-height, 64px));
        min-height: calc(100svh - var(--header-height, 64px));
        box-sizing: border-box;
        align-items: center;
    }

    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
        margin-bottom: 1rem;
        position: relative;
        z-index: 10;
        word-break: break-word;
        overflow-wrap: break-word;
        white-space: normal;
        padding: 0 10px;
    }

    .hero-subtitle {
        font-size: 1.2rem;
        margin-bottom: 1.5rem;
    }

    .hero-description {
        font-size: 1rem;
        max-width: 95%;
        margin: 1.5rem auto;
        line-height: 1.6;
    }

    .hero-contact {
        flex-direction: column;
        gap: 1rem;
        margin: 2rem 0;
    }

    .hero-github {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 2rem;
    }

    .contact-item {
        padding: 0.7rem 1.2rem;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 20px;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.7rem;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.08);
        font-size: 1rem;
    }

    .contact-item:hover {
        background: rgba(255, 255, 255, 0.15);
        transform: translateY(-2px);
        box-shadow: 0 5px 18px rgba(0, 0, 0, 0.12);
    }

    .contact-item i {
        color: #fbbf24;
        font-size: 1.2rem;
        width: 22px;
        text-align: center;
    }

    .contact-item span {
        font-weight: 500;
        letter-spacing: 0.3px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        margin-top: 2rem;
    }

    .btn {
        width: 250px;
        min-height: 48px;
        padding: 12px 24px;
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
        text-align: center;
        margin-bottom: 2.5rem;
    }

    .timeline::after {
        left: 20px;
    }

    .timeline-marker {
        left: 11px;
    }

    .timeline-item {
        padding-left: 60px;
        margin-bottom: 2.5rem;
    }

    .timeline-content {
        background: white;
        padding: 1.5rem;
        border-radius: 12px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .skill-category {
        text-align: center;
        padding: 2rem 1.5rem;
        background: white;
        border-radius: 12px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .project-card {
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        border-radius: 15px;
    }

    .achievements-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .cert-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    .cert-item {
        padding: 2rem 1.5rem;
        text-align: center;
        background: white;
        border-radius: 12px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .contact-info {
        order: 2;
    }

    .contact-form {
        order: 1;
        background: white;
        border-radius: 15px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        padding: 2rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    /* Improved hover effects for touch devices */
    .project-card:hover,
    .achievement-card:hover,
    .skill-category:hover {
        transform: none; /* Disable transform on mobile */
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    /* Better spacing for mobile content */
    section {
        padding: 4rem 0;
    }

    .container {
        padding: 0 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding-top: calc(var(--header-height, 64px) + var(--hero-pad-top-extra, 16px));
        padding-bottom: var(--hero-pad-bottom, 40px);
        min-height: calc(100vh - var(--header-height, 64px));
        min-height: calc(100svh - var(--header-height, 64px));
        position: relative;
        overflow: visible;
        box-sizing: border-box;
        z-index: 1;
        margin-top: 0;
        align-items: center;
    }

    .hero-content {
        position: relative;
        z-index: 10;
        width: 100%;
        padding: 0;
        margin-top: 0;
    }

    .hero-title {
        font-size: 1.8rem;
        line-height: 1.2;
        position: relative;
        z-index: 10;
        word-break: break-word;
        overflow-wrap: break-word;
        white-space: normal;
        margin-bottom: 1rem;
        padding: 0 10px;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin: 1rem 0;
    }

    .hero-description {
        font-size: 0.95rem;
        line-height: 1.5;
        margin: 1.5rem auto;
        max-width: 90%;
    }

    .hero-description p {
        margin-bottom: 0.8rem;
    }

    .hero-contact,
    .hero-github {
        gap: 0.8rem;
        margin: 1.5rem 0;
    }

    .contact-item {
        font-size: 0.9rem;
        padding: 0.8rem 1rem;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 25px;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.8rem;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }

    .contact-item:hover {
        background: rgba(255, 255, 255, 0.15);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .contact-item i {
        width: 24px;
        font-size: 1.1rem;
        color: #fbbf24;
        text-align: center;
    }

    .contact-item span {
        font-weight: 500;
        letter-spacing: 0.3px;
    }

    .hero-buttons {
        margin-top: 2rem;
        gap: 1rem;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        padding: 12px 24px;
        font-size: 0.95rem;
        min-height: 48px;
    }

    section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 2rem;
    }

    .skill-category,
    .project-card,
    .achievement-card {
        padding: 1.5rem;
    }

    .skill-category h3 {
        font-size: 1.1rem;
    }

    .skill-tags {
        gap: 0.4rem;
    }

    .skill-tag {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        text-align: center;
        align-items: center;
    }

    .project-header h3 {
        font-size: 1.2rem;
        line-height: 1.3;
    }

    .project-card p {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    .project-tags {
        gap: 0.4rem;
    }

    .tag {
        font-size: 0.75rem;
        padding: 0.25rem 0.6rem;
    }

    .project-link-indicator {
        font-size: 0.85rem;
        margin-top: 0.8rem;
        padding-top: 0.8rem;
    }

    .timeline-content h3 {
        font-size: 1.2rem;
        line-height: 1.3;
    }

    .timeline-content h4 {
        font-size: 1rem;
    }

    .timeline-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .achievement-card {
        text-align: center;
    }

    .achievement-card h3 {
        font-size: 1.1rem;
        line-height: 1.3;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .form-group input,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 12px;
    }

    .contact-info .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
        padding: 1rem;
        background: #f9fafb;
        border-radius: 8px;
        margin-bottom: 1rem;
    }

    .contact-info .contact-item i {
        font-size: 1.2rem;
        color: #2563eb;
        margin-bottom: 0.5rem;
    }

    /* Enhanced navbar for mobile */
    .navbar {
        padding: 0.3rem 0;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-container {
        padding: 0.4rem 15px;
    }

    .nav-logo a {
        font-size: 1rem;
    }

    .nav-menu {
        top: 45px;
        padding: 1rem 0;
    }

    .nav-menu li {
        margin: 0.5rem 0;
    }

    .nav-link {
        font-size: 1.1rem;
        padding: 1rem;
        border-radius: 8px;
        transition: all 0.3s ease;
    }

    .nav-link:hover {
        background-color: #f3f4f6;
        color: #2563eb;
    }

    /* Better touch targets */
    .hamburger {
        padding: 10px;
        cursor: pointer;
    }

    /* Improved spacing */
    .about-intro,
    .about-detail {
        font-size: 0.95rem;
        line-height: 1.6;
        margin-bottom: 1.5rem;
    }

    .about-highlights {
        margin-top: 2rem;
    }

    .highlight-item {
        padding: 1rem;
        text-align: center;
    }

    .highlight-item i {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }

    .highlight-item span {
        font-size: 0.9rem;
        display: block;
    }

    /* Additional mobile optimizations */
    .hero-content {
        text-align: center;
        max-width: 100%;
    }

    .hero-title .highlight {
        display: block;
        margin-top: 0.2rem;
    }
}

/* Ultra-small mobile screens */
@media (max-width: 360px) {
    /* Slightly reduce hero breathing space on ultra-small screens */
    :root {
        --hero-pad-top-extra: 12px;
        --hero-pad-bottom: 28px;
    }

    .hero {
        padding-top: calc(var(--header-height, 64px) + var(--hero-pad-top-extra, 12px));
        padding-bottom: var(--hero-pad-bottom, 28px);
        min-height: calc(100vh - var(--header-height, 64px));
        min-height: calc(100svh - var(--header-height, 64px));
    }

    .hero-title {
        font-size: 1.4rem;
        margin-bottom: 0.6rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin: 0.4rem 0 0.8rem;
    }

    .hero-description {
        font-size: 0.9rem;
        line-height: 1.45;
        margin: 0.8rem auto;
        max-width: 92%;
    }

    .hero-description p { margin-bottom: 0.6rem; }

    .hero-contact,
    .hero-github {
        gap: 0.6rem;
        margin: 1rem 0;
    }

    .contact-item {
        font-size: 0.85rem;
        padding: 0.6rem 0.9rem;
        border-radius: 20px;
    }

    .contact-item i {
        width: 20px;
        font-size: 1rem;
    }

    .hero-buttons {
        margin-top: 1rem;
        gap: 0.8rem;
    }

    .btn {
        max-width: 260px;
        width: 100%;
        padding: 10px 18px;
        font-size: 0.95rem;
        min-height: 44px; /* better touch target */
    }

    section { padding: 48px 0; }
}

    /* Better button spacing and sizing */
    .btn-primary, .btn-secondary {
        font-weight: 600;
        letter-spacing: 0.5px;
        border-radius: 25px;
        transition: all 0.3s ease;
    }

    /* Improve form elements for mobile */
    .form-group {
        margin-bottom: 1.5rem;
    }

    /* Better loading and performance */
    img {
        max-width: 100%;
        height: auto;
    }

    /* Enhanced accessibility for mobile */
    .nav-link:focus,
    .btn:focus {
        outline: 2px solid #2563eb;
        outline-offset: 2px;
    }

    /* Smooth animations for mobile */
    .scroll-element {
        transition: opacity 0.6s ease, transform 0.6s ease;
    }

    /* Mobile-specific project card improvements */
    .project-card {
        position: relative;
        overflow: hidden;
    }

    .project-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
        transition: left 0.5s;
    }

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


/* Very small mobile devices - extra navbar clearance */
@media (max-width: 375px) {
    .hero {
    padding-top: calc(var(--header-height, 64px) + var(--hero-pad-top-extra, 16px));
    padding-bottom: var(--hero-pad-bottom, 40px);
        z-index: 1;
    position: relative;
    align-items: center;
    }

    .navbar {
        position: fixed;
        z-index: 1002;
        top: 0;
        left: 0;
        right: 0;
    }
}

/* Enhanced Scroll Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.95);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-180deg) scale(0.5);
    }
    to {
        opacity: 1;
        transform: rotate(0deg) scale(1);
    }
}

/* RE-ENABLE WORKING KEYFRAMES */
@keyframes heroFadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes heroSlideIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Scroll Element Base Styles */
.scroll-element {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transition-delay: var(--animation-delay, 0s);
}

.scroll-element.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Hero Section - FIXED ANIMATION SYSTEM */
.hero-title,
.hero-subtitle,
.hero-description,
.hero-contact,
.hero-github,
.hero-buttons {
    opacity: 0;
    transform: translateY(30px);
    animation: heroFadeInUp 0.8s ease forwards;
}

/* Override any scroll-element conflicts specifically */
.hero-contact.scroll-element,
.hero-github.scroll-element {
    opacity: 0 !important;
    transform: translateY(30px) !important;
    transition: none !important;
    animation: heroFadeInUp 0.8s ease forwards !important;
}

/* Staggered animation delays - ONLY ANIMATION SYSTEM */
.hero-title {
    animation-delay: 0.2s;
}

.hero-subtitle {
    animation-delay: 0.4s;
}

.hero-description {
    animation-delay: 0.6s;
}

.hero-contact {
    animation-delay: 0.8s;
}

.hero-github {
    animation-delay: 1.0s;
}

.hero-buttons {
    animation-delay: 1.2s;
}

/* Specific Animation Classes */
.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in-left {
    animation: fadeInLeft 0.8s ease forwards;
}

.fade-in-right {
    animation: fadeInRight 0.8s ease forwards;
}

.fade-in-scale {
    animation: fadeInScale 0.8s ease forwards;
}

.slide-in-up {
    animation: slideInUp 0.8s ease forwards;
}

.bounce-in {
    animation: bounceIn 1s ease forwards;
}

.rotate-in {
    animation: rotateIn 0.8s ease forwards;
}

/* Timeline specific animations */
.timeline-item.animate-in {
    animation: fadeInLeft 0.8s ease forwards;
}

.timeline-item:nth-child(even).animate-in {
    animation: fadeInRight 0.8s ease forwards;
}

/* Project cards staggered animation */
.project-card.animate-in {
    animation: fadeInScale 0.8s ease forwards;
}

/* Achievement cards bounce effect */
.achievement-card.animate-in {
    animation: bounceIn 1s ease forwards;
}

/* Certification items same as project cards */
.cert-item.animate-in {
    animation: fadeInScale 0.8s ease forwards;
}

/* Skill categories slide up */
.skill-category.animate-in {
    animation: slideInUp 0.8s ease forwards;
}

/* Section titles special animation */
.section-title.animate-in {
    animation: fadeInUp 1s ease forwards;
    position: relative;
}

.section-title.animate-in::after {
    animation: scaleX 0.8s ease 0.5s forwards;
    transform-origin: left;
    transform: scaleX(0);
}

@keyframes scaleX {
    to {
        transform: scaleX(1);
    }
}

/* Contact form animation */
.contact-form.animate-in {
    animation: fadeInRight 0.8s ease forwards;
}

.contact-item.animate-in {
    animation: fadeInLeft 0.8s ease forwards;
}

/* Navbar scroll animation */
.navbar {
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

/* Progress bars for skills (optional) */
.skill-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 2px;
}

/* Loading animation */
.loading {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Parallax container */
.parallax-container {
    overflow: hidden;
}

.parallax-element {
    transition: transform 0.1s ease-out;
}

/* Hover enhancements */
.project-card:hover,
.skill-category:hover,
.achievement-card:hover,
.cert-item:hover {
    transform: translateY(-8px) scale(1.02);
}

.timeline-item:hover .timeline-marker {
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
}

/* Stagger effects for grouped elements */
.stagger-item {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

/* Enhanced button animations */
.btn {
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Timeline marker enhancements */
.timeline-marker {
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
}

/* Scroll progress indicator styles */
.scroll-progress {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    height: 3px !important;
    background: linear-gradient(90deg, #667eea, #764ba2) !important;
    z-index: 10000 !important;
    transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
}

/* Text reveal animation */
.reveal-text span {
    display: inline-block;
}

/* Enhanced card hover effects */
.project-card,
.skill-category,
.achievement-card,
.cert-item {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Cursor trail (if enabled) */
.cursor-trail {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transition: all 0.1s ease;
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Enhanced section transitions */
section {
    position: relative;
    overflow: hidden;
    /* So anchored jumps account for fixed navbar */
    scroll-margin-top: calc(var(--header-height, 64px) + 8px);
}

/* Accessibility - Respect user preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .scroll-progress {
        transition: none !important;
    }
}

@media (max-width: 768px) {
    .scroll-element {
        transition-duration: 0.6s;
    }
    
    .hero-animate {
        animation-duration: 0.8s;
    }
}