* {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}
body {
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
    color: #fff;
    position: relative;
    min-height: 100vh;
}
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}
#header {
    width: 100%;
    min-height: 100vh;
    position: relative;
}
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    position: fixed;
    top: 0;
    width: 100%;
    padding: 10px 15% 10px 0;
    z-index: 1000;
}
.text {
    color: #16f2b3;
    font-size: 1.875rem;
    line-height: 2.25rem;
    font-weight: 700;
    margin-left: 0;
}
.text a {
    text-decoration: none;
    color: inherit;
}
nav ul {
    margin-left: auto;
     
}
nav ul li {
    list-style: none;
    display: inline-block;
   margin: 10px 25px;
}
nav ul li a {
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    position: relative;
}
nav ul li a::after {
    content: '';
    width: 0;
    height: 3px;
    background: #ff004f;
    position: absolute;
    left: 0;
    bottom: -6px;
    transition: 0.5s;
}
nav ul li a:hover::after {
    width: 100%;
}
.container {
    padding: 10px 10%;
}
.header-text {
    margin-top: 20%;
    font-size: 30px;
    text-align: left;
}
.header-text h1 {
    font-size: 60px;
    margin-bottom: 20px;
}
.header-text h1 span {
    color: #ff004f;
}
/* About */
#about {
    padding: 80px 0;
    color: #ababab;
}
.row {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.about-col-1 {
    flex-basis: 35%;
}
.about-col-1 img {
    width: 100%;
    height: auto;
    border-radius: 15px;
}
.about-col-2 {
    flex-basis: 55%;
}
.sub-title {
    color: #fff;
    font-weight: 600;
    text-align: center;
    position: relative;
    margin-bottom: 40px;
}
.sub-title::after {
    content: '';
    width: 100px;
    height: 4px;
    background: #16f2b3;
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}
.who-am-i {
    color: #16f2b3;
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 20px;
}
.about-col-2 p {
    font-size: 18px;
    line-height: 30px;
}
/* Skills */
#skills {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
}
.skills-slider {
    overflow: hidden;
    width: 100%;
}
.skills-track {
    display: flex;
    animation: scroll 20s linear infinite;
}
.skill-box {
    flex: 0 0 300px;
    background: #1a1a1a;
    margin: 10px;
    padding: 20px;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.3s;
}
.skill-box:hover {
    transform: scale(1.05);
}
.skill-box h3 {
    color: #16f2b3;
    font-size: 24px;
    margin-bottom: 10px;
}
.skill-box p {
    color: #ababab;
    font-size: 16px;
}
.skills-track.paused {
    animation-play-state: paused;
}
@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
/* Modal */
.skills-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    background: #1a1a1a;
    padding: 20px;
    border-radius: 10px;
    width: 80%;
    max-width: 600px;
    position: relative;
}
.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: #fff;
}
.progress-bar {
    background: #333;
    border-radius: 5px;
    overflow: hidden;
    margin: 10px 0;
    height: 20px;
}
.progress {
    height: 100%;
    transition: width 1s ease-in-out;
}
.progress.html { background: #e34c26; }
.progress.css { background: #264de4; }
.progress.js { background: #f0db4f; }
.progress.python { background: #3776ab; }
.progress.java { background: #b07219; }
.progress.cpp { background: #00599c; }
.progress.c { background: #555555; }
.progress.react { background: #61dafb; }
.progress.node { background: #68a063; }
.progress.express { background: #000000; }
.progress.mysql { background: #00758f; }
.progress.sklearn { background: #f7931e; }
.progress.tensorflow { background: #ff6f00; }
.progress.git { background: #f05033; }
.progress.github { background: #181717; }
.progress.windows { background: #00a1f1; }
.progress.linux { background: #fcc624; }
.progress.office { background: #d83b01; }
/* Additional skill colors */
.progress.csharp { background: #239120; }
.progress.r { background: #276dc3; }
.progress.php { background: #777bb4; }
.progress.sql { background: #e38c00; }
.progress.numpy { background: #013243; }
.progress.pandas { background: #150458; }
.progress.xgboost { background: #ff6600; }
.progress.vscode { background: #007acc; }
.progress.vs { background: #5c2d91; }
.progress.rstudio { background: #75aadb; }
.progress.colab { background: #f9ab00; }
.progress.cisco { background: #1ba0d7; }
.progress.macos { background: #999999; }
.progress.word { background: #2b579a; }
.progress.excel { background: #217346; }
.progress.ppt { background: #d24726; }
.progress.keynote { background: #0088cc; }
.progress.latex { background: #008080; }
/* Education */
#education {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
}
.edu-title {
    color: #fff;
    font-size: 2.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 10px;
}
.edu-subtitle {
    color: #ababab;
    font-size: 1rem;
    text-align: center;
    margin-bottom: 40px;
}
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: #16f2b3;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}
.timeline-item {
    padding: 10px 0;
    position: relative;
    width: 50%;
}
.timeline-item:nth-child(even) {
    margin-left: 50%;
}
.timeline-dot {
    position: absolute;
    width: 10px;
    height: 10px;
    background: #16f2b3;
    border-radius: 50%;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
}
.timeline-year {
    color: #fff;
    font-size: 1.2rem;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
}
.timeline-content {
    background: #1a1a1a;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(22, 242, 179, 0.3);
    position: relative;
    text-align: left;
}
.timeline-content p {
    margin: 0;
    font-size: 0.9rem;
    color: #ababab;
}
.timeline-content strong {
    color: #fff;
    font-size: 1rem;
}
/* Projects */
#projects {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
}
.project-subtitle {
    color: #ababab;
    font-size: 1rem;
    text-align: center;
    margin-bottom: 40px;
}
.project-grid {
    display: flex;
    gap: 25px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 20px 10px;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.project-grid::-webkit-scrollbar {
    display: none;
}
.project-card {
    background: #1a1a1a;
    border-radius: 15px;
    min-width: 350px;
    flex: 0 0 350px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    scroll-snap-align: start;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.05);
}
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(22, 242, 179, 0.15);
}
.project-preview {
    position: relative;
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
}
.project-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.9;
    transition: transform 0.3s, opacity 0.3s;
}
.project-card:hover .project-preview img {
    transform: scale(1.05);
    opacity: 1;
}
.project-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #16f2b3;
    color: #1a1a1a;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.project-info {
    padding: 20px;
}
.project-info h3 {
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 12px;
    line-height: 1.4;
}
.project-info p {
    color: #ababab;
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.project-card .tags {
    margin-bottom: 15px;
}
.project-card .tag {
    display: inline-block;
    background: #333;
    color: #fff;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    margin: 0 6px 6px 0;
}
.project-date {
    color: #ababab;
    font-size: 0.85rem;
    margin-bottom: 15px;
}
.project-date i {
    margin-right: 8px;
    color: #16f2b3;
}
.project-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.view-details {
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s, gap 0.3s;
}
.view-details:hover {
    color: #16f2b3;
    gap: 12px;
}
.external-link {
    width: 40px;
    height: 40px;
    background: #ff004f;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
}
.external-link:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(255, 0, 79, 0.4);
}
/* Publications */
#publications {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
}
.publications-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-height: 600px;
    overflow-y: auto;
    padding-right: 10px;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.publications-list::-webkit-scrollbar {
    display: none;
}
.publication-card {
    background: #1a1a1a;
    border-radius: 20px;
    padding: 30px;
    border: 1px solid rgba(22, 242, 179, 0.2);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.publication-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(22, 242, 179, 0.2);
    border-color: rgba(22, 242, 179, 0.4);
}
.publication-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 20px;
}
.publication-icon {
    width: 60px;
    height: 60px;
    background: #ff004f;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.publication-icon i {
    font-size: 1.5rem;
    color: #fff;
}
.publication-title-section {
    flex: 1;
}
.publication-title-section h3 {
    color: #fff;
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 8px;
}
.publication-meta {
    color: #ababab;
    font-size: 0.9rem;
}
.publication-description {
    color: #ababab;
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 20px;
}
.publication-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 25px;
}
.pub-tag {
    background: #333;
    color: #fff;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    transition: background 0.3s;
}
.pub-tag:hover {
    background: #444;
}
.publication-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.publication-status {
    color: #16f2b3;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.publication-status i {
    font-size: 1rem;
}
.publication-buttons {
    display: flex;
    gap: 12px;
}
.pub-btn {
    padding: 12px 24px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.3s, box-shadow 0.3s;
}
.pdf-btn {
    background: #333;
    color: #fff;
}
.pdf-btn:hover {
    background: #444;
    transform: translateY(-2px);
}
.doi-btn {
    background: #ff004f;
    color: #fff;
}
.doi-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 0, 79, 0.4);
}
/* Certifications */
#certifications {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
}
.certifications-grid {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}
.certification-card {
    background: #1a1a1a;
    border-radius: 15px;
    padding: 25px;
    width: 350px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}
.certification-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(22, 242, 179, 0.15);
}
.certification-card h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 10px;
}
.certification-card p {
    color: #ababab;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 15px;
}
.certification-card .tags {
    margin-bottom: 0;
}
.certification-card .tag {
    color: #16f2b3;
}
/* Contact */
#contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a3d 0%, #0e0d0e 100%);
}
.contact-left {
    flex-basis: 35%;
}
.contact-right {
    flex-basis: 60%;
}
.contact-left p {
    margin-top: 20px;
    color: #ababab;
    font-size: 1rem;
}
.contact-left p i {
    color: #ff004f;
    margin-right: 10px;
    font-size: 1.2rem;
}
.social-icons {
    margin-top: 20px;
}
.social-icons a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    background: #333;
    color: #fff;
    border-radius: 50%;
    margin-right: 10px;
    font-size: 18px;
    text-decoration: none;
    text-align: center;
    transition: background 0.3s;
}
.social-icons a:hover {
    background: #16f2b3;
}
.btn.btn2 {
    color: #fff;
    margin-top: 20px;
    display: inline-block;
}
.btn.btn2:hover {
    background: #e60045;
}
.contact-right form {
    width: 100%;
}
.contact-right form input,
.contact-right form textarea {
    width: 100%;
    background: #333;
    border: none;
    border-radius: 5px;
    padding: 10px;
    margin: 10px 0;
    color: #fff;
    font-size: 0.9rem;
    outline: none;
}
.contact-right form textarea {
    resize: vertical;
    height: 120px;
}
.contact-right form button {
    cursor: pointer;
}
/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px 5%;
    }
    .header-text h1 {
        font-size: 40px;
    }
    .sub-title {
        font-size: 40px;
    }
    .skill-box {
        flex: 0 0 250px;
    }
    .about-col-1, .about-col-2 {
        flex-basis: 100%;
    }
    .about-col-1 img {
        width: 100%;
        height: auto;
        margin-top: 20px;
    }
    nav ul li {
        margin: 10px 15px;
    }
    nav ul li a {
        font-size: 16px;
    }
    .timeline::after {
        left: 20px;
    }
    .timeline-item {
        width: 100%;
        margin-left: 0;
    }
    .timeline-item:nth-child(even) {
        margin-left: 0;
    }
    .timeline-dot {
        left: 20px;
    }
    .timeline-year {
        left: 20px;
        transform: translateX(0);
    }
    .timeline-content {
        margin-left: 40px;
    }
    .project-grid {
        padding: 20px 5px;
    }
    .project-card {
        min-width: 300px;
        flex: 0 0 300px;
    }
    .project-preview {
        height: 150px;
    }
    .publication-card {
        padding: 20px;
    }
    .publication-header {
        flex-direction: column;
        gap: 15px;
    }
    .publication-title-section h3 {
        font-size: 1.2rem;
    }
    .publication-footer {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    .publication-buttons {
        width: 100%;
    }
    .pub-btn {
        flex: 1;
        justify-content: center;
    }
    .certification-card {
        width: 100%;
        max-width: 350px;
    }
    .contact-left, .contact-right {
        flex-basis: 100%;
    }
    .contact-right {
        margin-top: 30px;
    }
}


/* =====================================================
   MOBILE DROPDOWN NAV — MOBILE ONLY
   ===================================================== */

.menu-toggle {
  display: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: #fff;
}

@media (max-width: 768px) {

  /* show hamburger only on mobile */
  .menu-toggle {
    display: block;
  }

  /* dropdown menu */
  nav ul {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(14, 20, 24, 0.65);
    backdrop-filter: blur(8px);
    display: none;
    flex-direction: column;
    text-align: center;
    z-index: 999;
  }

  nav ul.active {
    display: flex;
  }

  nav ul li {
    margin: 0;
    border-top: 1px solid rgba(255,255,255,0.08);
  }

  nav ul li a {
    display: block;
    padding: 16px 0;
    font-size: 1rem;
  }
}