/* Global Brand System Variables */
:root {
    --bg-base: #070709;
    --card-bg: rgba(13, 13, 20, 0.55);
    --border-color: rgba(255, 255, 255, 0.06);
    
    /* Elegant SaaS Colors */
    --accent-indigo: #6366f1;   /* Royal Indigo */
    --accent-teal: #14b8a6;     /* Cyber Teal */
    --accent-cyan: #06b6d4;     /* Electric Cyan */
    
    --text-main: #f3f4f6;
    --text-muted: #94a3b8;
    
    /* Modern SaaS Typography */
    --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    --transition-smooth: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    --border-radius-lg: 20px;
    --border-radius-md: 12px;
}

/* Reset & Global styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-base);
    color: var(--text-main);
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--bg-base);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-indigo);
}

/* Dynamic Spotlight Ambient Background (follows cursor dynamically) */
.background-radial {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    background-image: 
        radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(20, 184, 166, 0.04) 0%, transparent 40%);
    background-size: cover;
    pointer-events: none;
}

/* Translucent Glassmorphism Module */
.glass {
    background: var(--card-bg);
    backdrop-filter: blur(24px) saturate(150%);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    border: 1px solid var(--border-color);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.45),
        inset 0 1px 2px rgba(255, 255, 255, 0.15),
        inset 0 -1px 2px rgba(255, 255, 255, 0.05);
}

/* Floating Navigation Header */
.navbar {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius-lg);
    z-index: 9999;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-sans);
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    color: #fff;
    text-decoration: none;
}

.nav-logo:hover {
    transform: translateY(-2px);
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
}

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

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
    padding: 0.2rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-indigo);
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: #fff;
}

.nav-link.active {
    color: #fff;
}

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

.nav-btn {
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    color: #000;
    background-color: #fff;
    padding: 0.55rem 1.4rem;
    border-radius: 12px;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
}

.nav-btn:hover {
    background-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

/* Core Container dimensions */
.main-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Global Sections */
.section {
    padding: 7rem 0;
}

.section-header {
    margin-bottom: 3.5rem;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--accent-indigo);
    letter-spacing: 0.1em;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.03em;
    margin-top: 0.5rem;
}

/* Generic Pill Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
}

.green-pulse {
    background: rgba(16, 185, 129, 0.08);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.pulse-dot {
    width: 6px;
    height: 6px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
    animation: pulse 1.8s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 1; }
    50% { transform: scale(1.4); opacity: 0.5; }
    100% { transform: scale(0.9); opacity: 1; }
}

/* Typewriter Cursor */
.typewriter-cursor {
    display: inline-block;
    width: 3px;
    height: 1.1em;
    background-color: var(--accent-indigo);
    margin-left: 4px;
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
}

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

/* 1. HERO SECTION */
.hero-section {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 140px;
}

.hero-status {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.location-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.location-tag svg {
    width: 12px;
    height: 12px;
    vertical-align: middle;
}

.hero-title {
    font-size: clamp(2.8rem, 6.5vw, 4.5rem);
    font-weight: 850;
    line-height: 1.1;
    color: #fff;
    letter-spacing: -0.04em;
    margin-bottom: 2rem;
}

.gradient-text {
    background: linear-gradient(45deg, var(--accent-indigo), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-text-alt {
    background: linear-gradient(45deg, var(--accent-cyan), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-muted);
    font-weight: 400;
    max-width: 720px;
    line-height: 1.6;
    margin-bottom: 3rem;
}

.hero-cta {
    display: flex;
    gap: 1.25rem;
}

.btn {
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.75rem 1.8rem;
    border-radius: 12px;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
}

.btn-primary {
    background-color: #fff;
    color: #000;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.03);
    color: #fff;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* 2. SELECTED PROJECTS SECTION */
.featured-project-card {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    align-items: center;
    margin-bottom: 3rem;
    transition: var(--transition-smooth);
}

.featured-project-card:hover {
    border-color: rgba(6, 182, 212, 0.25);
    box-shadow: 0 20px 40px rgba(6, 182, 212, 0.05);
}

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

.project-num {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-cyan);
    letter-spacing: 0.08em;
    display: block;
    margin-bottom: 0.75rem;
}

.project-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.project-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.8rem;
}

.project-tags {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.project-tags span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.06);
    border: 1px solid rgba(6, 182, 212, 0.12);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.project-actions {
    display: flex;
    gap: 1rem;
}

.btn-action {
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.55rem 1.2rem;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
    color: #fff;
}

.btn-action svg {
    width: 14px;
    height: 14px;
}

.btn-action:hover {
    background-color: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-action.solid {
    background: linear-gradient(135deg, var(--accent-cyan), #0891b2);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.25);
}

.btn-action.solid:hover {
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.5);
    transform: translateY(-2px);
}

/* High-fidelity CSS Mockup dashboard visual */
.project-visual {
    width: 100%;
    aspect-ratio: 16/11;
    background: rgba(8, 8, 12, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--border-radius-md);
    padding: 0;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
}

.mock-dashboard {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

.dash-header {
    height: 36px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    gap: 1.5rem;
}

.dash-dots {
    display: flex;
    gap: 6px;
}

.dash-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.dash-dots .dot:nth-child(1) { background-color: #ff5f56; }
.dash-dots .dot:nth-child(2) { background-color: #ffbd2e; }
.dash-dots .dot:nth-child(3) { background-color: #27c93f; }

.dash-search-bar {
    flex: 1;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    padding: 3px 12px;
    text-align: center;
    max-width: 240px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.dash-body {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.dash-sidebar {
    width: 48px;
    background: rgba(255, 255, 255, 0.01);
    border-right: 1px solid rgba(255, 255, 255, 0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 1rem;
    gap: 1.25rem;
}

.sidebar-item {
    color: rgba(255, 255, 255, 0.25);
    transition: var(--transition-smooth);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.sidebar-item.active, .sidebar-item:hover {
    color: var(--accent-cyan);
}

.sidebar-item svg {
    width: 15px;
    height: 15px;
}

.dash-panel {
    flex: 1;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    overflow: hidden;
}

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

.panel-header h5 {
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
}

.panel-date {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: #10b981;
    background: rgba(16, 185, 129, 0.08);
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.panel-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.panel-metric-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.metric-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 500;
}

.metric-value {
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    margin-top: 2px;
}

.metric-trend {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    position: absolute;
    right: 8px;
    bottom: 8px;
}

.metric-trend.positive {
    color: #10b981;
}

.panel-chart-container {
    flex: 1;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chart-title {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 600;
}

.panel-chart-container .dash-content {
    flex: 1;
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    padding: 0.5rem 0.5rem 0;
}

.dash-block-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    height: 100%;
    justify-content: flex-end;
}

.panel-chart-container .dash-block {
    width: 100%;
    border-radius: 4px 4px 0 0;
    transition: var(--transition-smooth);
}

.panel-chart-container .dash-block.blue {
    height: 45%;
    background: rgba(6, 182, 212, 0.2);
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.panel-chart-container .dash-block.purple {
    height: 75%;
    background: linear-gradient(to top, rgba(99, 102, 241, 0.6), rgba(99, 102, 241, 0.2));
    border: 1px solid rgba(99, 102, 241, 0.4);
}

.panel-chart-container .dash-block.orange {
    height: 95%;
    background: linear-gradient(to top, rgba(20, 184, 166, 0.7), rgba(6, 182, 212, 0.2));
    border: 1px solid rgba(20, 184, 166, 0.5);
}

.bar-label {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    color: var(--text-muted);
}

/* Grid other projects */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.project-card {
    padding: 2.2rem;
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
}

.project-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3), 0 0 20px rgba(99, 102, 241, 0.15);
}

.project-card h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    margin-top: 0.5rem;
    margin-bottom: 0.75rem;
}

.project-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
    flex: 1;
    margin-bottom: 1.5rem;
}

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

.project-tags-sm span {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
}

/* 3. AREAS OF EXPERTISE SECTION */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.skills-card {
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
}

.skills-card:hover {
    border-color: rgba(99, 102, 241, 0.25);
}

.card-icon {
    margin-bottom: 0.5rem;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.card-icon {
    color: var(--accent-indigo);
    width: 22px;
    height: 22px;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.skills-pills, .skills-pills-alt {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skills-pills span {
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid rgba(99, 102, 241, 0.15);
    padding: 0.4rem 1.1rem;
    border-radius: 30px;
    transition: var(--transition-smooth);
}

.skills-pills span:hover {
    background-color: var(--accent-indigo);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

.skills-pills-alt span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-teal);
    background: rgba(20, 184, 166, 0.04);
    border: 1px solid rgba(20, 184, 166, 0.12);
    padding: 0.3rem 0.8rem;
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.skills-pills-alt span:hover {
    border-color: var(--accent-teal);
    color: #fff;
}

/* 4. VERIFIED CREDENTIALS TABLE SECTION */
.credentials-table {
    display: flex;
    flex-direction: column;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.cred-row {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr 0.3fr;
    padding: 1.8rem 2.2rem;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    transition: var(--transition-smooth);
}

.cred-row:last-child {
    border-bottom: none;
}

.cred-row:hover {
    background-color: rgba(255, 255, 255, 0.01);
}

.cred-issuer {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-indigo);
    font-weight: 500;
}

.cred-details h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.25rem;
}

.cred-details .meta {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

.verify-btn {
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition-smooth);
    justify-self: flex-end;
}

.verify-btn svg {
    width: 12px;
    height: 12px;
}

.verify-btn:hover {
    color: #fff;
    text-shadow: 0 0 5px rgba(255,255,255,0.4);
}

/* 5. Narrative / TIMELINE SECTION */
.timeline {
    display: flex;
    flex-direction: column;
    margin-top: 1.5rem;
}

.timeline-row {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border-color);
}

.timeline-year {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent-indigo);
    font-weight: 500;
}

.timeline-content h3 {
    font-size: 1.5rem;
    font-weight: 850;
    color: #fff;
    letter-spacing: -0.02em;
    margin-bottom: 0.4rem;
}

.timeline-role {
    font-weight: 600;
    color: var(--accent-teal);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.timeline-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 90%;
}

/* 6. LINGUISTICS GRID */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.lang-card {
    padding: 2.2rem;
    border-radius: var(--border-radius-lg);
    transition: var(--transition-smooth);
}

.lang-card:hover {
    border-color: var(--accent-indigo);
}

.lang-card h3 {
    font-size: 1.4rem;
    font-weight: 750;
    color: #fff;
    margin-bottom: 0.4rem;
}

.lang-prof {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 7. CONNECT SECTION */
.connect-section {
    border-top: 1px solid var(--border-color);
    padding-top: 8rem;
}

.connect-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 5rem;
    align-items: center;
}

.connect-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    color: #fff;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.connect-desc {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 3rem;
}

.mail-channel {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.mail-anchor {
    font-family: var(--font-sans);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-decoration: none;
    position: relative;
    display: inline-block;
    margin-top: 0.5rem;
}

.mail-anchor::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--accent-cyan);
    transition: var(--transition-smooth);
}

.mail-anchor:hover::after {
    width: 0;
}

/* Form layout */
.connect-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.connect-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.connect-form input, .connect-form textarea {
    background-color: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 0;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: #fff;
    transition: var(--transition-smooth);
}

.connect-form input:focus, .connect-form textarea:focus {
    outline: none;
    border-bottom-color: var(--accent-indigo);
}

.submit-btn {
    align-self: flex-start;
    border: none;
    background-color: #fff;
    color: #000;
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.85rem 1.8rem;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(255,255,255,0.05);
}

.submit-btn svg {
    width: 16px;
    height: 16px;
    transition: var(--transition-smooth);
}

.submit-btn:hover {
    background-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

.submit-btn:hover svg {
    transform: translateX(4px);
}

/* Footer system */
.footer {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
    background-color: rgba(7, 7, 9, 0.4);
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.footer-links a svg {
    width: 14px;
    height: 14px;
}

.footer-links a:hover {
    color: #fff;
}

/* Fade-in Scroll Reveal triggers */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Custom Responsive Styles */
@media (max-width: 1024px) {
    .navbar {
        padding: 0.6rem 1.5rem;
    }
    .hero-section {
        padding-top: 120px;
    }
    .featured-project-card {
        grid-template-columns: 1fr;
        gap: 3rem;
        padding: 2.2rem;
    }
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .languages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .connect-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
}

@media (max-width: 768px) {
    body {
        cursor: default; /* Disable trailing cursor physics on low viewport */
    }
    
    .cursor-dot, .cursor-glow {
        display: none;
    }
    
    .nav-links-wrapper {
        display: none; /* Add sidebar drawer handles in real products */
    }
    
    .hero-title {
        font-size: 2.3rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .cred-row {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .verify-btn {
        justify-self: flex-start;
    }
    
    .timeline-row {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 2rem 0;
    }
    
    .connect-form .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}

/* ==========================================================================
   ADVANCED FEATURE UPGRADES: THEME SWAPPING, FILTER PILLS & OVERLAY MODAL
   ========================================================================== */

/* 1. Global smooth transitions for theme switching */
html, body, .glass, .navbar, .skills-card, .project-card, .featured-project-card, .cred-row, .timeline-row, h1, h2, h3, h4, p, span, a, input, textarea, button, td, th {
    transition: background-color 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                color 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. Light Theme Token overrides & Contrast Fixes */
.light-theme {
    --bg-base: #f8fafc;                  /* Soft Alpine White background */
    --card-bg: rgba(255, 255, 255, 0.7);  /* Crisp glass card */
    --border-color: rgba(15, 23, 42, 0.08); /* Darker slate boundaries */
    
    --text-main: #0f172a;                /* Charcoal Slate 900 */
    --text-muted: #475569;               /* Slate 600 for descriptions */
    
    --accent-indigo: #4f46e5;            /* Indigo Primary */
}

/* Force light mode readability on elements that otherwise inherit hardcoded white values */
.light-theme .nav-logo,
.light-theme .nav-link:hover,
.light-theme .nav-link.active,
.light-theme .section-title,
.light-theme .hero-title,
.light-theme .project-title,
.light-theme .project-num,
.light-theme .project-card h4,
.light-theme .card-title,
.light-theme .skills-pills span,
.light-theme .cred-details h4,
.light-theme .timeline-content h3,
.light-theme .lang-card h3,
.light-theme .connect-title,
.light-theme .connect-form input,
.light-theme .connect-form textarea,
.light-theme .metric-value,
.light-theme .chart-title,
.light-theme .panel-header h5 {
    color: var(--text-main) !important;
}

/* Form boundary visibility corrections */
.light-theme .connect-form input,
.light-theme .connect-form textarea {
    border-bottom-color: rgba(15, 23, 42, 0.1);
}

.light-theme .connect-form input:focus,
.light-theme .connect-form textarea:focus {
    border-bottom-color: var(--accent-indigo);
}

/* Button & Action controls adaptivity triggers */
.light-theme .btn-primary,
.light-theme .submit-btn {
    background-color: var(--text-main);
    color: var(--bg-base);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1);
}

.light-theme .btn-primary:hover,
.light-theme .submit-btn:hover {
    background-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.light-theme .btn-secondary {
    background-color: rgba(0, 0, 0, 0.02);
    border-color: rgba(15, 23, 42, 0.15);
    color: var(--text-main);
}

.light-theme .btn-secondary:hover {
    background-color: rgba(0, 0, 0, 0.04);
    border-color: rgba(15, 23, 42, 0.25);
}

.light-theme .nav-btn {
    background-color: var(--text-main);
    color: var(--bg-base);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1);
}

.light-theme .nav-btn:hover {
    background-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 0 15px rgba(79, 70, 229, 0.3);
}

/* Skill pills visibility enhancements */
.light-theme .skills-pills span {
    background: rgba(79, 70, 229, 0.06);
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.light-theme .skills-pills span:hover {
    color: #fff !important;
}

.light-theme .skills-pills-alt span {
    background: rgba(20, 184, 166, 0.06);
    border: 1px solid rgba(20, 184, 166, 0.2);
}

.light-theme .skills-pills-alt span:hover {
    color: var(--text-main);
    border-color: var(--accent-teal);
}

/* Narrative timeline overrides */
.light-theme .timeline-desc,
.light-theme .location-tag {
    color: var(--text-muted);
}

/* 3. Theme switch navigation wrapper styling */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.theme-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.theme-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.15);
    transform: rotate(15deg) scale(1.05);
}

.light-theme .theme-btn:hover {
    background: rgba(15, 23, 42, 0.03);
    border-color: rgba(15, 23, 42, 0.15);
}

.theme-icon {
    width: 16px;
    height: 16px;
}

/* 4. Skills filtering buttons & tab menus styling */
.skills-filter-wrapper {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.75rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.45rem 1.2rem;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

.light-theme .filter-btn:hover {
    color: #000;
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.15);
}

.filter-btn.active {
    background: #fff;
    color: #000;
    border-color: #fff;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.light-theme .filter-btn.active {
    background: #0f172a;
    color: #fff;
    border-color: #0f172a;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

/* Skills card & pills dim action */
.skills-pills span, .skills-pills-alt span {
    transition: opacity 0.4s ease, transform 0.4s ease, background-color 0.4s ease;
}

.skills-pills span.dimmed, .skills-pills-alt span.dimmed {
    opacity: 0.2;
    transform: scale(0.95);
    pointer-events: none;
}

.skills-card {
    transition: opacity 0.4s ease, transform 0.4s ease, border-color 0.4s ease;
}

.skills-card.dimmed {
    opacity: 0.35;
}

/* 5. Fixed ambient math constellation canvas background */
#ambient-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    transition: opacity 1s ease;
}

/* 6. Case Study Detail Modal Overlay */
.project-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 100000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-modal.open {
    opacity: 1;
    pointer-events: all;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(4, 4, 6, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.light-theme .modal-overlay {
    background: rgba(248, 250, 252, 0.6);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 720px;
    max-height: 85vh;
    border-radius: var(--border-radius-lg);
    z-index: 100001;
    overflow-y: auto;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 3rem;
}

.project-modal.open .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.modal-close svg {
    width: 14px;
    height: 14px;
}

.modal-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

.light-theme .modal-close:hover {
    color: #000;
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.15);
}

/* Modal Inner Layout details styling */
.modal-body h3 {
    font-size: 2rem;
    font-weight: 850;
    color: #fff;
    letter-spacing: -0.03em;
    margin-bottom: 0.4rem;
}

.light-theme .modal-body h3 {
    color: #0f172a;
}

.modal-body .modal-subtitle {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 1.8rem;
}

.modal-section {
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.modal-section h4 {
    font-size: 1.05rem;
    font-weight: 750;
    color: #fff;
    margin-bottom: 0.75rem;
}

.light-theme .modal-section h4 {
    color: #0f172a;
}

.modal-section p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Tabular specifications modal design */
.modal-details-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.8rem;
}

.modal-details-table th, .modal-details-table td {
    padding: 0.8rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.modal-details-table th {
    font-family: var(--font-mono);
    color: var(--accent-indigo);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.modal-details-table td {
    color: var(--text-muted);
}

.modal-details-table td strong {
    color: #fff;
}

.light-theme .modal-details-table td strong {
    color: #0f172a;
}

.modal-details-table tr:last-child td {
    border-bottom: none;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background-color: var(--accent-indigo);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-smooth);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background-color: #4f46e5;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
    transform: translateY(-3px);
}