:root {
    --bg-black: #000000;
    --bg-dark: #0a0a0a;
    --bg-card: #111111;
    --border-gray: #222222;
    /*--text-white: #ffffff;*/
    --text-white:#ffffffe0;
    --text-gray: #888888;
   /* --text-dim: #555555;*/
    --text-dim: #888888;
    --hover-gray: #1a1a1a;
}
::selection {
background: #0b8f4f;
color: #fff;

}

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

body {
    cursor: url('cursors/cur67.cur'), auto;
    font-family: 'Space Grotesk', sans-serif;
    background: var(--bg-black);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}
a, button, .hamburger, input, textarea, select,
.download-btn, .filter-btn, .btn, .btn-primary, .btn-secondary,
.social-btn, .academic-btn, .view-publication-btn, .submit-btn,
.cert-link-btn, .close-menu {
    cursor: url('cursors/cur67.cur'), pointer !important;
}
.cursor {
    animation: blink 1s infinite;
}
/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-gray);
    padding: 1.2rem 0;
    z-index: 1000;
    animation: slideFromTop 0.8s ease-out;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.5px;
}

.logo-icon {
    font-size: 1.4rem;
}

.logo-light {
    font-weight: 400;
    color: var(--text-gray);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    flex-wrap: nowrap;
}

.nav-menu a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 1.2px;
    transition: color 0.2s;
    padding: 0.4rem 0.75rem;
    position: relative;
    display: block;
    white-space: nowrap;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    right: 50%;
    height: 1px;
    background: var(--text-white);
    transition: left 0.25s, right 0.25s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-white);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    left: 0.75rem;
    right: 0.75rem;
}

.hamburger {
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1001;
    padding: 6px;
    border: 1px solid var(--border-gray);
    transition: border-color 0.2s, background 0.2s;
    flex-shrink: 0;
}

.hamburger:hover {
    border-color: var(--text-white);
    background: var(--hover-gray);
}

.ham-icon {
    stroke: var(--text-white);
    display: block;
    transition: opacity 0.2s;
}

/* ─── Mobile Menu ─────────────────────────────────────────────────────────── */

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--bg-black);
    z-index: 999;
    transition: right 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 2rem;
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-gray);
}

.close-menu {
    background: none;
    border: 1px solid var(--border-gray);
    color: var(--text-white);
    cursor: pointer;
    padding: 0.45rem 0.55rem;
    transition: all 0.2s;
    line-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-menu svg {
    stroke: var(--text-white);
}

.close-menu:hover {
    background: var(--hover-gray);
    border-color: var(--text-white);
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    flex: 1;
}

.mobile-nav a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    transition: color 0.2s;
    padding: 0.8rem 0;
    border-bottom: 1px solid #111;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-nav a .nav-num {
    font-size: 0.85rem;
    color: #2a2a2a;
    letter-spacing: 2px;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    transition: color 0.2s;
}

.mobile-nav a:hover,
.mobile-nav a.active-mobile {
    color: var(--text-white);
}
.mobile-nav a:hover .nav-num,
.mobile-nav a.active-mobile .nav-num {
    color: #666;
}
/*keep*/
.mobile-nav a:hover,
.mobile-nav a.active-mobile,
.mobile-nav a.nav-hovered {
    color: var(--text-white);
}
.mobile-nav a:hover .nav-num,
.mobile-nav a.active-mobile .nav-num,
.mobile-nav a.nav-hovered .nav-num {
    color: #666;
}
/***/
.mobile-social-row {
    display: flex;
    gap: 0.7rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.mobile-social-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-gray);
    color: var(--text-gray);
    text-decoration: none;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.8px;
    padding: 0.55rem 0.9rem;
    transition: all 0.2s;
    white-space: nowrap;
}

.mobile-social-btn svg {
    flex-shrink: 0;
}

.mobile-social-btn:hover {
    border-color: var(--text-white);
    color: var(--text-white);
    background: var(--hover-gray);
}

.mobile-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-gray);
}

.mobile-footer p {
    color: var(--text-dim);
    font-size: 0.7rem;
    letter-spacing: 2px;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 7rem 3rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

/*.identity-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-gray);
    padding: 0.4rem 0.8rem;
    font-size: 0.65rem;
    letter-spacing: 1.5px;
    color: var(--text-white);
    margin-bottom: 2rem;
}*/
.identity-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-gray);
    padding: 0.4rem 0.8rem;
    font-size: 0.65rem;
   /* letter-spacing: 1.5px;*/
    /*color: #00ff88;*/
    color: var(--text-white);
    margin-bottom: 1rem;
}

.badge-icon {
    font-size: 1rem;
    stroke: #00ff88;
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: -3px;
    line-height: 0.9;
    margin-bottom: 1.5rem;
}

.cursor {
    animation: blink 1s infinite;
}

/* Credibility badges */
.credibility-badges {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.badge-item {
    font-size: 0.7rem;
    color: var(--text-gray);
    letter-spacing: 0.5px;
}

.badge-divider {
    color: var(--border-gray);
    font-size: 0.8rem;
}

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

.hero-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.6rem;
    color: var(--text-dim);
    letter-spacing: 1px;
    margin-bottom: 0.2rem;
}

.info-value {
    font-size: 0.85rem;
    color: var(--text-white);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.info-divider {
    color: var(--border-gray);
    font-size: 1.2rem;
}

.status-indicator {
    stroke: #00ff88;
    vertical-align: middle;
}

.download-btn {
    background: transparent;
    border: 2px solid var(--text-white);
    color: var(--text-white);
    padding: 0.8rem 1.8rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Space Grotesk', sans-serif;
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.download-btn:hover {
    background: var(--text-white);
    color: var(--bg-black);
}

.download-icon {
    font-size: 1rem;
}
.hero-separator {
    width: 100%;
    height: 1px;
    background: var(--border-gray);
    margin: 2rem 0;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.social-btn {
    background: transparent;
    border: 1px solid var(--border-gray);
    color: var(--text-white);
    padding: 0.6rem 1.2rem;
    font-size: 0.7rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s;
}

.social-btn:hover {
    border-color: var(--text-white);
    background: var(--hover-gray);
}

.academic-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 0.8rem;
}

.academic-btn {
    background: transparent;
    border: 1px solid var(--border-gray);
    color: var(--text-gray);
    padding: 0.6rem 1.2rem;
    font-size: 0.7rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s;
}

.academic-btn:hover {
    border-color: var(--text-white);
    color: var(--text-white);
    background: var(--hover-gray);
}

/* Section Styles */
.page-section {
    min-height: 100vh;
    padding: 8rem 3rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 3rem;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 1.2rem;
}

.title-white {
    color: var(--text-white);
}

.title-gray {
    color: var(--text-gray);
    font-weight: 400;
}

.section-description {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.7;
    max-width: 800px;
}

/* Hero Visual */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

/*.ascii-art {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.5rem;
    line-height: 0.6rem;
    color: var(--text-gray);
    white-space: pre;
    letter-spacing: -1px;
}*/
.ascii-art {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.55rem;       /* slightly larger for clarity */
    line-height: 1.1;        /* critical for vertical spacing */
    letter-spacing: 0;       /* DO NOT compress ASCII */
    white-space: pre;
    color: var(--text-gray);
    font-variant-ligatures: none; /* safety */
}

/* Section Styles */
.page-section {
    min-height: 100vh;
    padding: 8rem 3rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 3rem;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 1.2rem;
}

.title-white {
    color: var(--text-white);
}

.title-gray {
    color: var(--text-gray);
    font-weight: 400;
}

.section-description {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.7;
    max-width: 800px;
}

/* Portfolio Grid */
.portfolio-filters {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 2.5rem;
    justify-content: flex-end;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-gray);
    color: var(--text-gray);
    padding: 0.6rem 1.2rem;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'JetBrains Mono', monospace;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--text-white);
    color: var(--text-white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.portfolio-card {
    background: var(--bg-card);
    border: 1px solid var(--border-gray);
    border-left: 3px solid var(--text-white);
    padding: 2rem;
    transition: all 0.3s;
}

.portfolio-card:hover {
   /* background: #1a1a1ac5;*/
    transform: translateY(-5px);
}

.card-label {
    font-size: 0.6rem;
    color: var(--text-dim);
    letter-spacing: 1.5px;
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-label::before {
    content: '<> ';
    color: var(--text-white);
}

.portfolio-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.portfolio-card p {
    color: var(--text-gray);
    font-size: 0.8rem;
    line-height: 1.6;
    margin-bottom: 1.2rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.2rem;
}

.tag {
    background: transparent;
    border: 1px solid var(--border-gray);
    padding: 0.3rem 0.7rem;
    font-size: 0.6rem;
    color: var(--text-gray);
}

/*.view-publication-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-white);
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s;
    margin-top: 0.5rem;
}*/
.view-publication-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;

    color: #fff;                 /* black text */
    background-color: #2c2c2c;      /* filled white circle */
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 1px;

    padding: 0.5rem 0.9rem;
    border-radius: 999px;        /* pill / circular shape */

    transition: all 0.3s;
    margin-top: 0.5rem;
}



.view-publication-btn svg {
    transition: transform 0.3s;
}

.view-publication-btn:hover {
    gap: 0.9rem;
      background-color: #d5d5d5;
    color: #000;
}

.view-publication-btn:hover svg {
    transform: translate(2px, -2px);
}

/* Skills Grid Layout */
.skills-content {
    max-width: 800px;
    margin-bottom: 4rem;
}

.language-boxes {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.language-box {
    background: transparent;
    border: 1px solid var(--border-gray);
    padding: 0.8rem 1.5rem;
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: var(--text-white);
}

.skills-grid-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border: 1px solid var(--border-gray);
}

.skill-category-card {
    background: var(--bg-black);
    border-right: 1px solid var(--border-gray);
    border-bottom: 1px solid var(--border-gray);
    padding: 3rem 2.5rem;
    transition: all 0.3s;
}

.skill-category-card:nth-child(3n) {
    border-right: none;
}

.skill-category-card:nth-last-child(-n+3) {
    border-bottom: none;
}

.skill-category-card:hover {
    background: var(--text-white);
}

.skill-category-card:hover h3,
.skill-category-card:hover .skill-list li {
    color: var(--bg-black);
}

.skill-category-card:hover .skill-icon svg {
    stroke: var(--bg-black);
}

.skill-category-card:hover .skill-list li::before {
    color: var(--bg-black);
}

.skill-icon {
    margin-bottom: 2rem;
}

.skill-icon svg {
    stroke: var(--text-white);
    transition: stroke 0.3s;
}

.skill-category-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.5px;
    transition: color 0.3s;
}

.skill-list {
    list-style: none;
    padding: 0;
}

.skill-list li {
    color: var(--text-gray);
    font-size: 0.85rem;
    line-height: 2;
    position: relative;
    padding-left: 1.2rem;
    transition: color 0.3s;
}

.skill-list li::before {
    content: '/';
    position: absolute;
    left: 0;
    color: var(--text-white);
    transition: color 0.3s;
}

/* Certificates List */
.certificates-list {
    max-width: 100%;
}

.certificate-item {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background: var(--bg-black);
    border: 1px solid var(--border-gray);
    margin-bottom: 1.5rem;
    transition: all 0.3s;
}

.certificate-item:hover {
    background: var(--text-white);
    border-left: 4px solid var(--text-white);
}

.certificate-item:hover .cert-icon svg,
.certificate-item:hover .cert-year,
.certificate-item:hover h3,
.certificate-item:hover .cert-org {
    stroke: var(--bg-black);
    color: var(--bg-black);
}

.certificate-item:hover .cert-link-btn {
    border-color: var(--bg-black);
    background: var(--bg-black);
}

.certificate-item:hover .cert-link-btn svg {
    stroke: var(--text-white);
}

.cert-icon {
    flex-shrink: 0;
}

.cert-icon svg {
    stroke: var(--text-white);
    transition: stroke 0.3s;
}

.cert-content {
    flex: 1;
}

.cert-year {
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.certificate-item h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    letter-spacing: -0.5px;
    transition: color 0.3s;
}

.cert-org {
    color: var(--text-gray);
    font-size: 0.8rem;
    letter-spacing: 1px;
    transition: color 0.3s;
}

.cert-link-btn {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border: 1px solid var(--border-gray);
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s;
}

.cert-link-btn svg {
    stroke: var(--text-white);
    transition: stroke 0.3s, transform 0.3s;
}

.cert-link-btn:hover svg {
    transform: translate(2px, -2px);
}

/* About Page */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.about-text p {
    color: var(--text-gray);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1.2rem;
    font-family: 'Space Grotesk', sans-serif;
}

.stats-grid {
    display: grid;
    gap: 1.2rem;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--border-gray);
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s;
}

.stat-box:hover {
    background: var(--hover-gray);
    border-color: var(--text-white);
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 0.4rem;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-gray);
    letter-spacing: 1.5px;
}

/* Education Timeline */
.timeline {
    max-width: 900px;
    margin: 2.5rem 0;
    position: relative;
}

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

.timeline-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 2.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
   /* background: var(--text-white);
    border: 3px solid var(--bg-black);*/
     background: var(--bg-black);
    border: 3px solid var(--text-white);
    box-shadow: 0 0 0 4px var(--bg-black),
                0 0 20px rgba(255, 255, 255, 0.5);
    z-index: 1;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-gray);
    border-left: 3px solid var(--text-white);
    padding: 1.5rem;
}

.timeline-year {
    font-size: 0.75rem;
    color: var(--text-white);
    letter-spacing: 1.5px;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin: 0.4rem 0;
}

.timeline-institution {
    color: var(--text-gray);
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
}

.timeline-content p {
    color: var(--text-gray);
    font-size: 0.8rem;
    line-height: 1.6;
}
.center-box {
    max-width: 700px;
    margin: 4rem auto 0;
    padding: 2.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-gray);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.center-box::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, 
        transparent 0%,
        rgba(255, 255, 255, 0.1) 25%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0.1) 75%,
        transparent 100%
    );
    background-size: 200% 200%;
    animation: shimmer 3s linear infinite;
    z-index: -1;
    border-radius: inherit;
}

.center-box::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bg-card);
    z-index: -1;
}

@keyframes shimmer {
    0% {
        background-position: -200% -200%;
    }
    100% {
        background-position: 200% 200%;
    }
}

.center-box h3 {
    font-size: 1.3rem;
    color: var(--text-white);
    margin-bottom: 1rem;
    font-weight: 600;
}

.center-box p {
    color: var(--text-gray);
    font-weight: 500;
    font-size: 1.05rem;
    max-width: 600px;
}

/* Contact Page */
.contact-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 1px;
    color: var(--text-gray);
    margin-bottom: 0.8rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-gray);
    color: var(--text-white);
    padding: 1rem;
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-white);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    background: var(--text-white);
    border: none;
    color: var(--bg-black);
    padding: 1rem 2.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'JetBrains Mono', monospace;
}

.submit-btn:hover {
    background: var(--text-gray);
}

/* Responsive */
@media (max-width: 968px) {
    .nav-menu {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-section {
        flex-direction: column;
        text-align: center;
        padding: 7rem 2rem 2rem;
    }

    .hero-title {
        font-size: 3.5rem;
    }

    /* Hide ASCII art on mobile */
    .hero-visual {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    /* Fix portfolio filters on mobile */
    .portfolio-filters {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.6rem;
        margin-bottom: 2rem;
    }

    .filter-btn {
        font-size: 0.65rem;
        padding: 0.5rem 1rem;
        white-space: nowrap;
    }

    .skills-grid-layout {
        grid-template-columns: 1fr;
    }

    .skill-category-card {
        border-right: none;
    }

    .skill-category-card:nth-child(3n) {
        border-right: none;
    }

    .certificate-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .cert-link-btn {
        align-self: flex-end;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .nav-container {
        padding: 0 2rem;
    }

    .page-section {
        padding: 7rem 2rem 3rem;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }

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

    /* Mobile-specific hero restructuring */
    .hero-content {
        max-width: 100%;
    }

    /* Hide identity badge on mobile - it's decorative */
    .identity-badge {
        display: none;
    }

    /* Simplify hero title */
    .hero-title {
        font-size: 1.8rem;
        letter-spacing: -1px;
        margin-bottom: 0.8rem;
        line-height: 1.1;
    }

    .hero-title .cursor {
        display: none;
    }

    /* Credibility badges - show on mobile */
    .credibility-badges {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: 0.5rem;
        margin-bottom: 1.5rem;
        font-size: 0.7rem;
        color: var(--text-gray);
    }

    .badge-item {
        white-space: nowrap;
    }

    .badge-divider {
        color: var(--border-gray);
    }

    /* Portfolio filters - ensure all buttons visible on mobile */
    .portfolio-filters {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-bottom: 2rem;
        width: 100%;
    }

    .filter-btn {
        font-size: 0.6rem;
        padding: 0.5rem 0.9rem;
        white-space: nowrap;
        flex: 0 1 auto;
        min-width: fit-content;
    }

    /* Restructure hero info for mobile - stacked style */
    .hero-info {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        margin-bottom: 2rem;
        text-align: left;
        border: 1px solid var(--border-gray);
        padding: 0;
    }

    /* Show all info items on mobile - stacked layout */
    .info-item {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem 1.2rem;
        border-bottom: 1px solid var(--border-gray);
        gap: 0.4rem;
    }

    .info-item:last-of-type {
        border-bottom: none;
    }

    /* Hide dividers on mobile */
    .info-divider {
        display: none;
    }

    /* Style the label - stacked on top */
    .info-item .info-label {
        display: block;
        font-size: 0.65rem;
        letter-spacing: 1.5px;
        color: var(--text-dim);
        font-weight: 600;
    }

    /* Style the value - below label */
    .info-item .info-value {
        font-size: 0.9rem;
        color: var(--text-white);
        font-weight: 400;
        text-align: left;
    }

    /* Keep status indicator visible */
    .info-item .info-value svg {
        width: 14px;
        height: 14px;
        margin-left: 0.4rem;
        stroke: #00ff88;
    }

    /* Primary CTA - make it prominent */
    .download-btn {
        width: 100%;
        justify-content: center;
        margin-bottom: 2rem;
        padding: 1rem 2rem;
        font-size: 0.8rem;
    }

    .hero-separator {
        margin: 1.5rem 0 2rem;
    }

    /* Add section header before social links */
    .social-links::before {
        content: 'ACADEMIC PROFILES';
        display: block;
        width: 100%;
        text-align: center;
        font-size: 0.7rem;
        letter-spacing: 2px;
        color: var(--text-gray);
        margin-bottom: 1.2rem;
        font-weight: 600;
    }

    /* Keep social links side by side but allow wrapping */
    .social-links {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem;
        margin-bottom: 2rem;
    }

    .social-btn {
        flex: 0 1 auto;
        min-width: fit-content;
        font-size: 0.65rem;
        padding: 0.7rem 1rem;
    }

    /* Keep academic links side by side but allow wrapping */
    .academic-links {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem;
    }

    .academic-btn {
        flex: 0 1 auto;
        min-width: fit-content;
    }

    .certificate-item h3 {
        font-size: 1.1rem;
    }

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

    .close-menu {
        font-size: 1.5rem;
    }

    /* Keep PhD in navbar on mobile - remove this rule */
    /* .logo-light {
        display: none;
    } */

    /* Update mobile footer text */
    .mobile-footer p {
        font-size: 0.7rem;
    }
}

/* Page Load Animations */
@keyframes slideFromLeft {
    from {
        opacity: 0;
        transform: translateX(-100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideFromRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

@keyframes fadeInUpScroll {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Apply animations to elements - Page Load */
.navbar {
    animation: slideFromTop 0.8s ease-out;
}

.hero-content .identity-badge {
    opacity: 0;
    animation: slideFromLeft 0.8s ease-out 0.2s forwards;
}

.hero-content .hero-title {
    opacity: 0;
    animation: slideFromLeft 0.8s ease-out 0.4s forwards;
}

.hero-content .hero-info {
    opacity: 0;
    animation: slideFromLeft 0.8s ease-out 0.6s forwards;
}

.hero-content .download-btn {
    opacity: 0;
    animation: slideFromBottom 0.8s ease-out 0.8s forwards;
}

.hero-content .social-links {
    opacity: 0;
    animation: slideFromBottom 0.8s ease-out 1s forwards;
}

.hero-content .academic-links {
    opacity: 0;
    animation: slideFromBottom 0.8s ease-out 1.2s forwards;
}

.hero-visual .ascii-art {
    opacity: 0;
    animation: slideFromRight 1s ease-out 0.4s forwards;
}

.section-header {
    opacity: 0;
    animation: slideFromTop 0.8s ease-out 0.2s forwards;
}

.portfolio-filters {
    opacity: 0;
    animation: slideFromRight 0.8s ease-out 0.4s forwards;
}

/* Scroll-triggered animations */
.fade-in-up {
    animation: fadeInUpScroll 0.8s ease-out forwards;
}

/* Initial state for scroll animations */
.portfolio-card,
.skill-category-card,
.certificate-item,
.stat-box,
.timeline-item,
.about-text {
    opacity: 0;
    transform: translateY(30px);
}

/* Page load animations for cards with staggered entrance */

.skill-category-card:nth-child(1),
.certificate-item:nth-child(1) {
    animation: slideFromLeft 0.6s ease-out 0.3s forwards;
}


.skill-category-card:nth-child(2),
.certificate-item:nth-child(2) {
    animation: slideFromBottom 0.6s ease-out 0.4s forwards;
}


.skill-category-card:nth-child(3),
.certificate-item:nth-child(3) {
    animation: slideFromRight 0.6s ease-out 0.5s forwards;
}


.skill-category-card:nth-child(4),
.certificate-item:nth-child(4) {
    animation: slideFromLeft 0.6s ease-out 0.6s forwards;
}


.skill-category-card:nth-child(5),
.certificate-item:nth-child(5) {
    animation: slideFromBottom 0.6s ease-out 0.7s forwards;
}


.skill-category-card:nth-child(6),
.certificate-item:nth-child(6) {
    animation: slideFromRight 0.6s ease-out 0.8s forwards;
}


.skill-category-card:nth-child(7),
.certificate-item:nth-child(7) {
    animation: slideFromLeft 0.6s ease-out 0.9s forwards;
}


.skill-category-card:nth-child(8),
.certificate-item:nth-child(8) {
    animation: slideFromBottom 0.6s ease-out 1s forwards;
}


.skill-category-card:nth-child(9),
.certificate-item:nth-child(9) {
    animation: slideFromRight 0.6s ease-out 1.1s forwards;
}

.about-text,
.stats-grid,
.timeline,
.skills-content,
.contact-form {
    opacity: 0;
    animation: slideFromLeft 0.8s ease-out 0.3s forwards;
}

.stat-box:nth-child(1) {
    animation: slideFromTop 0.6s ease-out 0.5s forwards;
}

.stat-box:nth-child(2) {
    animation: slideFromBottom 0.6s ease-out 0.6s forwards;
}

.stat-box:nth-child(3) {
    animation: slideFromTop 0.6s ease-out 0.7s forwards;
}

.stat-box:nth-child(4) {
    animation: slideFromBottom 0.6s ease-out 0.8s forwards;
}

.timeline-item:nth-child(odd) {
    opacity: 0;
    animation: slideFromLeft 0.6s ease-out 0.5s forwards;
}

.timeline-item:nth-child(even) {
    opacity: 0;
    animation: slideFromRight 0.6s ease-out 0.7s forwards;
}