/* ==========================================================================
   PREMIUM DARK-FIRST DESIGN SYSTEM
   ========================================================================== */

/* Custom Typography & Palette Setup */
:root {
    /* Color Variables - Light Theme First (Default) */
    --bg-color: #f9fafb;
    --bg-alt: #f3f4f6;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-bg-solid: #ffffff;
    --border-color: rgba(17, 24, 39, 0.08);
    --border-color-hover: rgba(79, 70, 229, 0.2);
    
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    /* Accents & Gradients */
    --accent-primary: #4f46e5;
    --accent-secondary: #7c3aed;
    --accent-tertiary: #2563eb;
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --text-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --glow-color: rgba(79, 70, 229, 0.06);
    
    /* System Configs */
    --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --container-width: 1250px;
    --nav-height: 76px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 20px var(--glow-color);
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --bg-color: #030712;
    --bg-alt: #0b0f19;
    --card-bg: rgba(17, 24, 39, 0.75);
    --card-bg-solid: #111827;
    --border-color: rgba(243, 244, 246, 0.08);
    --border-color-hover: rgba(99, 102, 241, 0.25);
    
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-primary: #6366f1; /* Indigo */
    --accent-secondary: #8b5cf6; /* Violet */
    --accent-tertiary: #3b82f6; /* Blue */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --text-gradient: linear-gradient(135deg, #c7d2fe, #e9d5ff);
    --glow-color: rgba(99, 102, 241, 0.12);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 25px var(--glow-color);
}

/* General Resets & Defaults */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

.font-mono {
    font-family: var(--font-mono);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
    position: relative;
}

.bg-alt {
    background-color: var(--bg-alt);
}

/* Scroll Animation classes */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}

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

/* Header & Navigation */
.navbar {
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(16px) saturate(180%);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

[data-theme="dark"] .navbar {
    background-color: rgba(3, 7, 18, 0.75);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    gap: 1.8rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    padding: 0.4rem 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-fast);
}

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

.nav-btn {
    padding: 0.4rem 1.2rem;
    border: 1px solid var(--accent-primary);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition-fast);
    background-color: rgba(99, 102, 241, 0.08);
}

.nav-btn:hover {
    background: var(--accent-gradient);
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    transform: translateY(-1px);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.5rem;
    transition: var(--transition-fast);
    border-radius: 50%;
}

.theme-toggle:hover {
    color: var(--text-primary);
    background-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Section Header Styles */
.section-header {
    margin-bottom: 3.5rem;
}

.section-tag {
    display: inline-block;
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-title::after {
    content: '';
    display: block;
    height: 1px;
    flex-grow: 1;
    background-color: var(--border-color);
}

/* Hero Section Styles */
.hero {
    padding: 10rem 0 6rem;
    text-align: center;
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-image-wrapper {
    position: relative;
    margin-bottom: 2rem;
    width: 140px;
    height: 140px;
}

.avatar-glow {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--accent-gradient);
    filter: blur(12px);
    opacity: 0.35;
    z-index: 1;
    animation: pulseGlow 4s infinite alternate;
}

@keyframes pulseGlow {
    0% { transform: scale(0.95); opacity: 0.25; }
    100% { transform: scale(1.08); opacity: 0.45; }
}

.hero-img {
    position: relative;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
    z-index: 2;
    background-color: var(--bg-alt);
}

.featured-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--text-primary);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    transition: var(--transition-fast);
}

.featured-badge i {
    color: var(--accent-primary);
}

.featured-badge:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.pulse {
    animation: badgePulse 2s infinite;
}

@keyframes badgePulse {
    0% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
    70% { box-shadow: 0 0 0 8px rgba(99, 102, 241, 0); }
    100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
    letter-spacing: -1.5px;
    line-height: 1.1;
}

.highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1.8rem;
}

.hero-bio {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.text-link {
    color: var(--text-primary);
    font-weight: 600;
    border-bottom: 1px solid var(--accent-primary);
}

.text-link:hover {
    color: var(--accent-primary);
    border-bottom-color: transparent;
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.social-btn {
    padding: 0.6rem 1.4rem;
    background-color: var(--card-bg);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.primary-btn {
    background: var(--accent-gradient);
    color: white !important;
    border: none;
    box-shadow: var(--shadow-sm);
}

.primary-btn:hover {
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
    transform: translateY(-2px);
}

.social-btn:hover:not(.primary-btn) {
    border-color: var(--border-color-hover);
    background-color: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Academic Path / Education Section */
.edu-timeline {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.edu-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2.2rem;
    display: flex;
    gap: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    position: relative;
}

.edu-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-gradient);
    border-top-left-radius: var(--radius-md);
    border-bottom-left-radius: var(--radius-md);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.edu-card:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.edu-card:hover::before {
    opacity: 1;
}

.edu-badge {
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: var(--accent-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
}

.edu-content {
    flex-grow: 1;
}

.edu-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.edu-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.edu-header .date {
    font-size: 0.8rem;
    color: var(--text-muted);
    background-color: rgba(0, 0, 0, 0.03);
    padding: 0.1rem 0.6rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .edu-header .date {
    background-color: rgba(255, 255, 255, 0.03);
}

.degree {
    font-size: 1.05rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.edu-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    font-weight: 500;
}

.courses-wrapper {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.course-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 0.6rem;
}

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

.course-tag {
    font-size: 0.75rem;
    background-color: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

[data-theme="dark"] .course-tag {
    background-color: rgba(255, 255, 255, 0.03);
}

/* Industrial Timeline / Work Experience Section */
.work-timeline {
    max-width: 950px;
    margin: 0 auto;
    position: relative;
    padding-left: 20px;
}

.work-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background-color: var(--border-color);
}

.work-item {
    position: relative;
    margin-bottom: 3.5rem;
}

.work-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -25px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--bg-color);
    border: 3px solid var(--accent-primary);
    z-index: 10;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.work-item:hover .timeline-marker {
    background-color: var(--accent-primary);
    transform: scale(1.2);
}

.work-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.work-item:hover .work-content {
    border-color: var(--border-color-hover);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-2px);
}

.work-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.work-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.work-header .company {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1.05rem;
}

.work-header .company::before {
    content: '@';
    margin-right: 3px;
    color: var(--text-muted);
}

.work-header .date {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.work-list {
    margin-left: 1.2rem;
    list-style-type: square;
}

.work-list li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
    line-height: 1.6;
}

.work-list li strong {
    color: var(--text-primary);
}

.work-list li:last-child {
    margin-bottom: 0;
}

/* Research & Publications Section */
.research-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    max-width: 1050px;
    margin: 0 auto;
}

.research-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.research-card:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.featured-research {
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.card-glow {
    position: absolute;
    width: 250px;
    height: 250px;
    top: -125px;
    right: -125px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0) 70%);
    pointer-events: none;
    z-index: 1;
}

.research-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.2rem;
}

.pub-title {
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.5px;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.pub-authors {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.highlight-author {
    color: var(--text-primary);
    font-weight: 700;
    border-bottom: 1px dashed var(--accent-primary);
}

.pub-venue {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.venue-journal {
    font-weight: 700;
    color: var(--text-secondary);
}

.pub-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-bottom: 1.5rem;
}

.doi-pill {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background-color: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

[data-theme="dark"] .doi-pill {
    background-color: rgba(255, 255, 255, 0.03);
}

.pub-links {
    display: flex;
    gap: 0.8rem;
}

.pub-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    background-color: var(--card-bg-solid);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.pub-link-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-1px);
}

/* Accordion Smooth Styles */
.pub-summary-block {
    position: relative;
}

.abstract-toggle-btn {
    width: 100%;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.7rem 1rem;
    text-align: left;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.abstract-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-color-hover);
    background-color: rgba(255, 255, 255, 0.01);
}

.toggle-icon {
    transition: transform var(--transition-fast) ease;
}

.abstract-toggle-btn[aria-expanded="true"] .toggle-icon {
    transform: rotate(180deg);
}

.abstract-wrapper {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows var(--transition-smooth) ease;
    overflow: hidden;
}

.abstract-toggle-btn[aria-expanded="true"] + .abstract-wrapper {
    grid-template-rows: 1fr;
}

.abstract-content {
    min-height: 0;
    transition: visibility var(--transition-smooth) ease;
    visibility: hidden;
}

.abstract-toggle-btn[aria-expanded="true"] + .abstract-wrapper .abstract-content {
    visibility: visible;
}

.abstract-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 1.2rem;
}

.methodology-list {
    margin-top: 0.8rem;
    margin-left: 1.2rem;
    list-style-type: circle;
}

.methodology-list li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.methodology-list li strong {
    color: var(--text-primary);
}

/* Research Assistant Card details */
.research-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.4rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.research-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
}

.research-header .institution {
    color: var(--accent-primary);
    font-weight: 600;
}

.research-header .institution::before {
    content: '@';
    color: var(--text-muted);
    margin-right: 2px;
}

.research-header .date {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.research-area {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.research-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tech-stack-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-pill {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    background-color: var(--card-bg-solid);
    color: var(--text-secondary);
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-weight: 500;
    transition: var(--transition-fast);
}

.tech-pill:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

/* Compact Education Section Styles */
.edu-compact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    max-width: 100%;
    margin: 0 auto;
}

.edu-compact-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.8rem 2.2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    position: relative;
}

.edu-compact-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-gradient);
    border-top-left-radius: var(--radius-md);
    border-bottom-left-radius: var(--radius-md);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.edu-compact-card:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.edu-compact-card:hover::before {
    opacity: 1;
}

.edu-compact-info h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.edu-compact-info .school {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.3rem;
}

.edu-compact-info .meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Projects Section Styles */
.projects-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    max-width: 100%;
    margin: 0 auto;
}

/* Featured Large Horizontal Card */
.project-featured-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    height: 400px; /* Uniform height for professional look */
}

/* Themed card glow overrides */
.project-featured-card.project-inferroute:hover {
    border-color: rgba(245, 158, 11, 0.4);
    box-shadow: var(--shadow-md), 0 10px 30px -10px rgba(245, 158, 11, 0.25);
}

.project-featured-card.project-quant:hover {
    border-color: rgba(20, 184, 166, 0.4);
    box-shadow: var(--shadow-md), 0 10px 30px -10px rgba(20, 184, 166, 0.25);
}

.project-featured-card.project-tabit:hover {
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: var(--shadow-md), 0 10px 30px -10px rgba(99, 102, 241, 0.25);
}

.project-img-container {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 250px;
    overflow: hidden;
    border-right: 1px solid var(--border-color);
    background-color: #ffffff; /* White background to match design schematics */
}

.img-overlay {
    display: none; /* Disabled overlays to keep technical diagrams sharp and bright */
}

[data-theme="light"] .img-overlay {
    display: none;
}

.project-showcase-img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Contain the image fully without cropping any parts of the diagram */
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0.8rem; /* Framing padding for system blueprints */
}

.project-featured-card:hover .project-showcase-img {
    transform: scale(1.04);
}

/* Spacing for project info - With custom scroll for long contents */
.project-info {
    padding: 1.8rem 2rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start; /* Changed from center to allow top alignment of scrollable items */
    overflow-y: auto; /* Enable scroll down inside the card */
    max-height: 100%;
    min-height: 0; /* Enforce flex/grid child constraint to allow scroll */
    height: 100%;  /* Fill the card height */
}

/* Sleek webkit scrollbar for project-info */
.project-info::-webkit-scrollbar {
    width: 5px;
}
.project-info::-webkit-scrollbar-track {
    background: transparent;
}
.project-info::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}
.project-info::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

.project-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-primary);
    margin-bottom: 0.8rem;
}

.project-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.project-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.7rem;
}

.project-description {
    font-size: 0.93rem;
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    line-height: 1.5;
}

.project-featured-card .tech-stack-pills {
    margin-bottom: 1.4rem;
}

.project-links {
    display: flex;
    gap: 0.8rem;
    margin-top: 0.2rem;
    margin-bottom: 1.2rem;
    padding-bottom: 0.2rem;
}

.proj-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 600;
    background-color: var(--card-bg-solid);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.proj-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-1px);
}

.accent-btn {
    background: var(--accent-gradient);
    color: white !important;
    border: none;
}

.accent-btn:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Scrollable container for minor projects grid */
.projects-scroll-wrapper {
    position: relative;
    margin-top: 2rem;
}

.projects-scroll-container {
    padding-bottom: 1.5rem;
    transition: all var(--transition-smooth);
}

/* Bottom fade overlay for scroll list indicator disabled */
.projects-scroll-wrapper::after {
    display: none;
}

.projects-scroll-wrapper.scrolled-bottom::after {
    display: none;
}

/* Projects Subgrid for Minor Cards */
.projects-subgrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

@media (min-width: 992px) {
    .projects-subgrid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.mini-img-container {
    position: relative;
    width: 100%;
    height: 160px;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
    margin: -2rem -2rem 1.5rem -2rem; /* Negate parent padding */
    width: calc(100% + 4rem); /* Full width */
}

.mini-project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-smooth);
}

.project-card-mini:hover .mini-project-img {
    transform: scale(1.05);
}

.project-card-mini {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    overflow: hidden; /* Clip image corners */
}

.project-card-mini:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md), 0 8px 24px -8px rgba(99, 102, 241, 0.25);
}

.mini-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
}

.mini-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
    transition: transform var(--transition-fast) ease, color var(--transition-fast) ease;
}

.project-card-mini:hover .mini-icon {
    transform: translateY(-2px) scale(1.1);
    color: var(--accent-secondary);
}

.mini-links {
    display: flex;
    gap: 0.6rem;
}

.mini-link-btn {
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.mini-link-btn:hover {
    color: var(--text-primary);
}

.mini-project-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
}

.mini-award {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.65rem;
    font-weight: 700;
    color: #f59e0b; /* Amber */
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.6rem;
}

.mini-project-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

.project-card-mini .tech-stack-pills {
    margin-top: auto;
}

/* Skills matrix styling */
.skills-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 100%;
    margin: 0 auto;
}

.skills-category-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2.2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    position: relative;
}

.skills-category-card:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.skills-icon-badge {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-bottom: 1.2rem;
}

.skills-category-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.2rem;
}

.skills-pills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skills-pills-list li {
    font-size: 0.8rem;
    font-family: var(--font-mono);
    background-color: var(--card-bg-solid);
    color: var(--text-secondary);
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-weight: 500;
    transition: var(--transition-fast);
}

.skills-pills-list li:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    transform: scale(1.05);
}

/* Contact Footer Section */
.footer {
    padding: 7rem 0 4rem;
    background-color: var(--bg-alt);
    border-top: 1px solid var(--border-color);
    position: relative;
}

.footer-badge {
    display: inline-block;
    color: var(--accent-primary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.8rem;
}

.footer h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.contact-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 2.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.footer-btn {
    padding: 0.8rem 1.6rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    box-shadow: var(--shadow-sm);
}

.mail-btn {
    background: var(--accent-gradient);
    color: white !important;
}

.mail-btn:hover {
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
    transform: translateY(-2px);
}

.phone-btn {
    background-color: var(--card-bg-solid);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.phone-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.social-icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--card-bg-solid);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    transition: var(--transition-fast);
}

.social-icon-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Mobile & Responsive Adjustments */
.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0.5rem;
}

.bar {
    display: block;
    width: 22px;
    height: 2px;
    margin: 4px auto;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

@media (max-width: 900px) {
    .project-featured-card {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .project-img-container {
        height: 220px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 66px;
    }
    
    .section {
        padding: 4.5rem 0;
    }
    
    .hamburger {
        display: block;
        z-index: 1010;
    }
    
    .nav-menu {
        position: fixed;
        left: 0;
        top: -100vh;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        height: 100vh;
        justify-content: center;
        align-items: center;
        transition: top 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        padding: 3rem 0;
        gap: 2rem;
        z-index: 1005;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        top: 0;
    }
    
    /* Hamburger Active states */
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }
    
    .hero-title {
        font-size: 2.6rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.7rem;
    }
    
    .edu-card {
        flex-direction: column;
        gap: 1rem;
        padding: 1.8rem;
    }
    
    .edu-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
    
    .work-timeline {
        padding-left: 15px;
    }
    
    .work-header {
        flex-direction: column;
        gap: 0.2rem;
        align-items: flex-start;
    }
    
    .work-header .date {
        margin-left: 0;
        font-size: 0.75rem;
    }
    
    .research-card {
        padding: 1.8rem;
    }
    
    .research-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }
    
    .research-header .date {
        margin-left: 0;
    }
    
    .project-info {
        padding: 1.8rem;
    }
}

/* Minor Projects Expand/Collapse Styles */
.project-card-mini.hidden-card {
    display: none !important;
}

@keyframes fadeInCard {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.project-card-mini.fade-in-card {
    animation: fadeInCard 0.45s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.more-projects-toggle-container {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
}

.more-projects-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.75rem 1.8rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    background-color: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.more-projects-toggle-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background-color: rgba(99, 102, 241, 0.04);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

[data-theme="dark"] .more-projects-toggle-btn:hover {
    background-color: rgba(99, 102, 241, 0.08);
}

.toggle-btn-icon {
    transition: transform var(--transition-fast) ease;
}

.more-projects-toggle-btn.expanded .toggle-btn-icon {
    transform: rotate(180deg);
}