@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- CUSTOM VARIABLES --- */
:root {
    /* Color Palette - Cybernetic Space Dark (Default) */
    --bg-base: hsl(224, 71%, 4%);
    --bg-surface: hsl(222, 47%, 7%);
    --bg-surface-elevated: hsl(223, 47%, 11%);
    --bg-glass: rgba(10, 15, 30, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 20%, 74%);
    --text-muted: hsl(215, 16%, 57%);
    
    /* Neon Accents */
    --primary-indigo: hsl(239, 84%, 67%);
    --primary-purple: hsl(271, 91%, 65%);
    --primary-cyan: hsl(188, 86%, 53%);
    --primary-cyan-rgb: 6, 182, 212;
    --primary-purple-rgb: 168, 85, 247;
    
    --gradient-primary: linear-gradient(135deg, var(--primary-indigo), var(--primary-purple));
    --gradient-accent: linear-gradient(135deg, var(--primary-purple), var(--primary-cyan));
    --gradient-glow: linear-gradient(90deg, var(--primary-indigo), var(--primary-purple), var(--primary-cyan));
    
    /* Shadows */
    --shadow-sm: 0 2px 8px -2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 12px 24px -4px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 24px 48px -12px rgba(0, 0, 0, 0.8);
    --shadow-glow: 0 0 25px rgba(139, 92, 246, 0.15);
    
    /* Typography & Structure */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

/* Light Theme Variables */
.light-theme {
    --bg-base: hsl(210, 40%, 96%);
    --bg-surface: hsl(0, 0%, 100%);
    --bg-surface-elevated: hsl(210, 40%, 98%);
    --bg-glass: rgba(255, 255, 255, 0.75);
    --border-color: rgba(0, 0, 0, 0.08);
    
    --text-primary: hsl(222, 47%, 11%);
    --text-secondary: hsl(217, 19%, 27%);
    --text-muted: hsl(215, 16%, 47%);
    
    /* Vibrant Soft Accents */
    --primary-indigo: hsl(239, 74%, 57%);
    --primary-purple: hsl(271, 81%, 55%);
    --primary-cyan: hsl(188, 86%, 43%);
    
    --shadow-sm: 0 2px 8px -2px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 12px 24px -4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 24px 48px -12px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 25px rgba(139, 92, 246, 0.08);
}

/* --- GENERAL RESET & BASE --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-surface-elevated);
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--bg-base);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-indigo);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Grid Background Overlay */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.4;
    pointer-events: none;
    z-index: 1;
}

.glowing-blob {
    position: absolute;
    width: 450px;
    height: 450px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--primary-purple-rgb), 0.12) 0%, rgba(var(--primary-cyan-rgb), 0) 70%);
    pointer-events: none;
    z-index: 1;
    filter: blur(40px);
    animation: float 20s infinite alternate;
}

.glowing-blob.blob-1 {
    top: 10%;
    left: -10%;
}

.glowing-blob.blob-2 {
    bottom: 20%;
    right: -10%;
    background: radial-gradient(circle, rgba(var(--primary-cyan-rgb), 0.12) 0%, rgba(var(--primary-purple-rgb), 0) 70%);
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -60px) scale(1.1); }
    100% { transform: translate(-20px, 30px) scale(0.9); }
}

/* --- REUSABLE UTILITIES & LAYOUTS --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

section {
    padding: 100px 0;
}

.section-header {
    margin-bottom: 60px;
    text-align: center;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 50px;
    background: rgba(var(--primary-purple-rgb), 0.1);
    color: var(--primary-purple);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid rgba(var(--primary-purple-rgb), 0.2);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

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

.section-desc {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 16px auto 0;
    font-size: 1.1rem;
}

/* Modern Glass Cards */
.glass-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-4px);
    border-color: rgba(var(--primary-purple-rgb), 0.25);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Premium Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
    opacity: 0;
    transition: var(--transition-smooth);
    z-index: 1;
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary:hover {
    box-shadow: 0 6px 24px rgba(139, 92, 246, 0.45);
    transform: translateY(-2px);
}

.btn-primary > * {
    position: relative;
    z-index: 2;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(4px);
}

.btn-secondary:hover {
    border-color: var(--primary-indigo);
    background: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
}

/* --- NAVIGATION HEADER --- */
header.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 20px 0;
    transition: var(--transition-smooth);
}

header.main-header.scrolled {
    padding: 12px 0;
    background: var(--bg-glass);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
}

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

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text-primary);
}

.logo-svg {
    width: 32px;
    height: 32px;
    fill: url(#logoGradient);
}

nav.main-nav ul {
    display: flex;
    gap: 32px;
    align-items: center;
}

nav.main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 6px 0;
}

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

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Switcher */
.theme-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    background: var(--bg-glass);
    transition: var(--transition-fast);
}

.theme-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--primary-cyan);
    background: rgba(var(--primary-cyan-rgb), 0.05);
}

.theme-toggle-btn .sun-icon {
    display: none;
}

.light-theme .theme-toggle-btn .sun-icon {
    display: block;
}

.light-theme .theme-toggle-btn .moon-icon {
    display: none;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-primary);
}

/* --- HERO SECTION --- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 140px;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero-text-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 50px;
    background: rgba(var(--primary-cyan-rgb), 0.08);
    border: 1px solid rgba(var(--primary-cyan-rgb), 0.2);
    color: var(--primary-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero-title span.name {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    margin-top: 8px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
}

.hero-subtitle strong {
    color: var(--text-primary);
    font-weight: 600;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* Hero Portrait Frame */
.hero-visual-content {
    display: flex;
    justify-content: center;
    position: relative;
}

.portrait-frame-outer {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    padding: 6px;
    background: var(--gradient-primary);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(139, 92, 246, 0.25);
    animation: morphFrame 8s ease-in-out infinite alternate;
}

.portrait-frame-inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg-surface);
}

.portrait-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: var(--transition-smooth);
}

.portrait-frame-outer:hover .portrait-image {
    transform: scale(1.06);
}

@keyframes morphFrame {
    0% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
    50% { border-radius: 30% 60% 70% 30% / 50% 60% 30% 70%; }
    100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
}

/* --- ABOUT ME SECTION --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-narrative p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 20px;
}

.about-narrative strong {
    color: var(--text-primary);
    font-weight: 600;
}

.about-narrative .highlight-block {
    border-left: 3px solid var(--primary-purple);
    padding-left: 20px;
    margin: 30px 0;
    font-style: italic;
}

.about-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.metric-card {
    padding: 30px;
    text-align: center;
}

.metric-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 10px;
}

.metric-label {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 8px;
}

.metric-sub {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- SKILLS SECTION --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.skills-category {
    padding: 40px 30px;
}

.skills-category-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    background: rgba(var(--primary-purple-rgb), 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-purple);
    font-size: 1.4rem;
    margin-bottom: 24px;
    border: 1px solid rgba(var(--primary-purple-rgb), 0.15);
}

.skills-category:nth-child(2) .skills-category-icon {
    color: var(--primary-cyan);
    background: rgba(var(--primary-cyan-rgb), 0.08);
    border-color: rgba(var(--primary-cyan-rgb), 0.15);
}

.skills-category:nth-child(3) .skills-category-icon {
    color: var(--primary-indigo);
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.15);
}

.skills-category-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 500;
}

.skill-name {
    color: var(--text-primary);
}

.skill-percentage {
    color: var(--text-muted);
}

.skill-bar-outer {
    height: 6px;
    width: 100%;
    background: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.skill-bar-inner {
    height: 100%;
    border-radius: 10px;
    background: var(--gradient-primary);
    width: 0; /* Animated dynamically with JS */
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.skills-category:nth-child(2) .skill-bar-inner {
    background: var(--gradient-accent);
}

/* --- TIMELINE SECTION --- */
.timeline-section {
    position: relative;
}

.timeline-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.timeline-column-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.timeline-column-title i {
    color: var(--primary-cyan);
}

.timeline-wrapper {
    position: relative;
    border-left: 2px solid var(--border-color);
    padding-left: 30px;
    margin-left: 10px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.timeline-item {
    position: relative;
}

.timeline-marker {
    position: absolute;
    left: -41px;
    top: 5px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--bg-base);
    border: 3px solid var(--primary-purple);
    z-index: 2;
    transition: var(--transition-fast);
}

.timeline-item:hover .timeline-marker {
    background: var(--primary-cyan);
    border-color: var(--primary-indigo);
    box-shadow: 0 0 10px var(--primary-cyan);
}

.timeline-card {
    padding: 24px;
}

.timeline-date {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(var(--primary-cyan-rgb), 0.08);
    color: var(--primary-cyan);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
    border: 1px solid rgba(var(--primary-cyan-rgb), 0.15);
}

.timeline-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.timeline-institution {
    font-size: 0.9rem;
    color: var(--primary-purple);
    font-weight: 600;
    margin-bottom: 12px;
}

.timeline-institution a:hover {
    text-decoration: underline;
}

.timeline-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* --- PORTFOLIO & RESEARCH SECTION --- */
.portfolio-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.portfolio-card {
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.portfolio-media {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
    background: #000;
}

.portfolio-media iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.portfolio-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.portfolio-card:hover .portfolio-media img {
    transform: scale(1.05);
}

.portfolio-body {
    padding: 30px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.portfolio-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 50px;
    background: var(--bg-surface-elevated);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.portfolio-card-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.portfolio-card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
    flex-grow: 1;
}

.portfolio-links {
    display: flex;
    gap: 16px;
}

/* Research Paper Specific Card Style */
.portfolio-card.research-card {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
}

.portfolio-card.research-card .portfolio-media {
    aspect-ratio: auto;
    height: 100%;
    border-bottom: none;
    border-right: 1px solid var(--border-color);
}

.portfolio-card.research-card .portfolio-body {
    padding: 40px;
}

/* --- MACHINE TRANSLATION INTERACTIVE PLAYGROUND --- */
.playground-section {
    position: relative;
}

.playground-grid {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 50px;
    align-items: flex-start;
}

.playground-body p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.playground-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 30px;
}

.play-feature {
    display: flex;
    align-items: center;
    gap: 16px;
}

.play-feature i {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(var(--primary-cyan-rgb), 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    font-size: 0.95rem;
    border: 1px solid rgba(var(--primary-cyan-rgb), 0.15);
}

.play-feature span {
    font-weight: 500;
    font-size: 0.95rem;
}

/* Playground Console UI */
.console-box {
    padding: 30px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    background: rgba(10, 15, 30, 0.85);
    box-shadow: var(--shadow-lg), 0 0 35px rgba(6, 182, 212, 0.1);
}

.console-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    margin-bottom: 24px;
}

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

.console-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.console-dot:nth-child(1) { background: #ef4444; }
.console-dot:nth-child(2) { background: #f59e0b; }
.console-dot:nth-child(3) { background: #10b981; }

.console-badge {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-cyan);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.console-badge::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-cyan);
    box-shadow: 0 0 8px var(--primary-cyan);
}

.console-inputs {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.translation-select {
    padding: 10px 16px;
    border-radius: var(--border-radius-sm);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    outline: none;
    transition: var(--transition-fast);
}

.translation-select:focus {
    border-color: var(--primary-cyan);
}

.console-textarea {
    width: 100%;
    padding: 16px;
    border-radius: var(--border-radius-sm);
    background: rgba(18, 24, 38, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    resize: none;
    outline: none;
    transition: var(--transition-fast);
}

.console-textarea:focus {
    border-color: var(--primary-cyan);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.1);
}

/* Translate Button inside play console */
.console-btn {
    width: 100%;
    margin-top: 10px;
}

/* Attention weights visualization */
.console-outputs {
    display: none; /* Displayed dynamically on output */
    flex-direction: column;
    gap: 24px;
    margin-top: 24px;
    border-top: 1px dashed var(--border-color);
    padding-top: 24px;
}

.console-outputs.active {
    display: flex;
}

.loader-anim {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 20px 0;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-cyan);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loader-text {
    font-size: 0.9rem;
    color: var(--primary-cyan);
    font-weight: 500;
}

.attention-vis {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.attention-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.attention-grid {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 16px;
    align-items: center;
    background: rgba(18, 24, 38, 0.4);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.attention-node {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
}

.attention-node.src-token {
    color: var(--primary-cyan);
}

.attention-node.tgt-token {
    color: var(--primary-purple);
}

.attention-weight-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 5px;
    position: relative;
    overflow: hidden;
}

.attention-weight-fill {
    height: 100%;
    border-radius: 5px;
    background: linear-gradient(90deg, var(--primary-cyan), var(--primary-purple));
    width: 0;
    transition: width 1s ease-out;
}

/* --- CONTACT SECTION --- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.contact-card {
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    background: rgba(var(--primary-cyan-rgb), 0.08);
    border: 1px solid rgba(var(--primary-cyan-rgb), 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-details h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.contact-details p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-details a:hover {
    color: var(--primary-cyan);
}

/* Contact Platforms Icons */
.platforms-list {
    display: flex;
    gap: 16px;
    margin-top: 10px;
}

.platform-link {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    background: var(--bg-glass);
    transition: var(--transition-fast);
}

.platform-link:hover {
    color: #fff;
    transform: translateY(-3px);
}

.platform-link.linkedin:hover {
    background: #0077b5;
    border-color: #0077b5;
}

.platform-link.github:hover {
    background: #24292e;
    border-color: #24292e;
}

.platform-link.twitter:hover {
    background: #1da1f2;
    border-color: #1da1f2;
}

/* Contact Form styling */
.contact-form-card {
    padding: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row-half {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--border-radius-sm);
    background: rgba(18, 24, 38, 0.4);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-purple);
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    resize: vertical;
}

/* Success toast or feedback */
.form-feedback {
    display: none;
    padding: 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 24px;
    text-align: center;
}

.form-feedback.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-feedback.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* --- FOOTER --- */
footer.main-footer {
    padding: 50px 0;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    text-align: center;
    position: relative;
    z-index: 2;
}

footer.main-footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer.main-footer a:hover {
    color: var(--primary-cyan);
}

/* --- RESPONSIVENESS (MOBILE-FIRST INSPIRED BREAKPOINTS) --- */
@media (max-width: 1024px) {
    section {
        padding: 80px 0;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .portfolio-card.research-card {
        grid-template-columns: 1fr;
    }
    
    .portfolio-card.research-card .portfolio-media {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        aspect-ratio: 16/9;
    }
}

@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-text-content {
        align-items: center;
    }
    
    .hero-visual-content {
        order: -1;
    }
    
    .about-grid, .timeline-grid, .playground-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-card.research-card {
        grid-column: span 1;
    }
    
    .mobile-nav-toggle {
        display: block;
        z-index: 101;
    }
    
    nav.main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-surface-elevated);
        border-left: 1px solid var(--border-color);
        padding: 100px 40px;
        display: flex;
        flex-direction: column;
        z-index: 100;
        transition: var(--transition-smooth);
        box-shadow: var(--shadow-lg);
    }
    
    nav.main-nav.active {
        right: 0;
    }
    
    nav.main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }
    
    .form-row-half {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .portrait-frame-outer {
        width: 260px;
        height: 260px;
    }
    
    .btn {
        width: 100%;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .about-metrics {
        grid-template-columns: 1fr;
    }
}