/* ==========================================================================
   DESIGN SYSTEM & CORE STYLES - CHITTURI NAGA RAJA TEJA ROHITH
   ========================================================================== */

:root {
    /* Color Palette (Apple/Linear/Stripe Dark Theme) */
    --bg-dark: #030712;
    --surface-slate: #0f172a;
    --surface-darker: #070b15;
    --surface-glass: rgba(15, 23, 42, 0.45);
    
    --primary-blue: #3b82f6;
    --primary-rgb: 59, 130, 246;
    --accent-cyan: #22d3ee;
    --accent-rgb: 34, 211, 238;
    
    --text-slate: #f8fafc;
    --text-muted: #94a3b8;
    --text-dark: #475569;
    
    --border-glass: rgba(255, 255, 255, 0.05);
    --border-glass-active: rgba(255, 255, 255, 0.15);
    
    --glow-blue: rgba(59, 130, 246, 0.12);
    --glow-cyan: rgba(34, 211, 238, 0.12);
    
    /* Font Stacks */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'Fira Code', 'Geist Mono', monospace;

    /* Spacing & Transitions */
    --container-width: 1200px;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    scrollbar-gutter: stable;
    background-color: var(--bg-dark);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-slate);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Custom Webkit Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Background Canvas & Blobs */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
}

.glow-blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(140px);
    z-index: 2;
    pointer-events: none;
    opacity: 0.35;
    mix-blend-mode: screen;
}
.glow-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--glow-blue) 0%, transparent 70%);
}
.glow-2 {
    bottom: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--glow-cyan) 0%, transparent 70%);
}
.glow-3 {
    top: 40%;
    left: 30%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    z-index: 100;
    background: rgba(3, 7, 18, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glass);
}

.header-container {
    max-width: var(--container-width);
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-slate);
    letter-spacing: 0.5px;
}
.logo-accent {
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}
.logo-text {
    margin: 0 4px;
}

.main-nav {
    display: flex;
    align-items: center;
}
.nav-list {
    display: flex;
    list-style: none;
    gap: 32px;
}
.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}
.nav-link:hover, .nav-link.active {
    color: var(--text-slate);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

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

/* Action Buttons */
.action-btn {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-slate);
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(4px);
}
.action-btn:hover {
    border-color: var(--border-glass-active);
    background: rgba(255, 255, 255, 0.05);
}

/* Voice Button Waveform Visualizer */
.voice-btn {
    border-color: rgba(34, 211, 238, 0.2);
}
.voice-btn:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(34, 211, 238, 0.15);
}
.wave-bar {
    width: 2px;
    height: 10px;
    background: var(--accent-cyan);
    display: inline-block;
    border-radius: 1px;
    transition: height 0.1s ease;
}
.voice-btn.playing .wave-bar {
    animation: wavePulse 0.8s ease-in-out infinite alternate;
}
.voice-btn.playing .wave-bar:nth-child(1) { animation-delay: 0.1s; }
.voice-btn.playing .wave-bar:nth-child(2) { animation-delay: 0.3s; }
.voice-btn.playing .wave-bar:nth-child(3) { animation-delay: 0.2s; }
.voice-btn.playing .wave-bar:nth-child(4) { animation-delay: 0.4s; }

.resume-btn {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(34, 211, 238, 0.1));
    border-color: rgba(59, 130, 246, 0.3);
}
.resume-btn:hover {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(34, 211, 238, 0.2));
}

/* ==========================================================================
   LANDING HERO SECTION
   ========================================================================== */

.hero-section {
    position: relative;
    height: 100vh;
    min-height: 650px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    overflow: hidden;
    padding: 0 24px;
}

.hero-grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 50% 50%, transparent 60%, var(--bg-dark) 100%),
        linear-gradient(rgba(255, 255, 255, 0.01) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.01) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
    opacity: 0.4;
    z-index: 2;
    pointer-events: none;
}

#universe-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: auto;
}

.hero-content {
    position: relative;
    max-width: 900px;
    text-align: center;
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-terminal-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-glass);
    padding: 6px 14px;
    border-radius: 100px;
    margin-bottom: 24px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--accent-cyan);
}
.pulse-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-cyan);
    animation: corePulse 2s infinite;
}

/* Hero Profile Avatar */
.hero-avatar-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin-bottom: 24px;
    border-radius: 50%;
    z-index: 10;
}

.hero-avatar-glow {
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    background: conic-gradient(from 0deg, var(--primary-blue), var(--accent-cyan), var(--primary-blue));
    border-radius: 50%;
    filter: blur(10px);
    opacity: 0.6;
    animation: radarRing 4s infinite linear reverse;
}

.hero-avatar {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    padding: 3px;
    background: linear-gradient(135deg, var(--surface-slate), var(--bg-dark));
    overflow: hidden;
    z-index: 2;
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.hero-avatar.avatar-fallback {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-avatar.avatar-fallback::after {
    content: 'R';
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--bg-dark);
}

.hero-typewriter {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    min-height: 10rem;
    margin-bottom: 24px;
    letter-spacing: -2px;
    background: linear-gradient(180deg, var(--text-slate) 0%, rgba(248, 250, 252, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.text-cursor {
    color: var(--accent-cyan);
    font-weight: 300;
    animation: cursorBlink 0.8s infinite;
    -webkit-text-fill-color: var(--accent-cyan);
}

.hero-reveal-content {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease, transform 1s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
}
.hero-reveal-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.brand-statement {
    font-size: 1.35rem;
    font-weight: 350;
    max-width: 600px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.brand-titles {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 40px;
}
.title-tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-slate);
    border: 1px solid rgba(255, 255, 255, 0.04);
    background: rgba(255, 255, 255, 0.02);
    padding: 4px 10px;
    border-radius: 6px;
}
.title-divider {
    color: var(--text-dark);
}

/* Mouse Scroll Down */
.scroll-prompt-container {
    display: flex;
    justify-content: center;
}
.scroll-down-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-muted);
    transition: var(--transition-fast);
}
.scroll-down-indicator:hover {
    color: var(--text-slate);
}
.scroll-mouse {
    width: 20px;
    height: 32px;
    border: 1.5px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
    margin-bottom: 8px;
}
.scroll-wheel {
    width: 3px;
    height: 6px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scrollScroll 1.5s infinite;
}
.scroll-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

/* ==========================================================================
   GLOBAL LAYOUTS & COMPONENT CONTAINERS
   ========================================================================== */

.section-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 100px 24px;
    position: relative;
    z-index: 10;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--accent-cyan);
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 600px;
    margin-bottom: 48px;
}

/* ==========================================================================
   SECTION 1 — THE ENGINEER
   ========================================================================== */

.engineer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: stretch;
}

.engineer-card {
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 40px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
}
.engineer-card:hover {
    border-color: var(--border-glass-active);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.info-card .card-icon {
    color: var(--accent-cyan);
    margin-bottom: 20px;
}
.info-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.info-card p {
    color: var(--text-muted);
    margin-bottom: 32px;
}

.education-timeline {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.edu-item {
    position: relative;
    padding-left: 24px;
}
.edu-marker {
    position: absolute;
    left: 0;
    top: 6px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-cyan);
}
.edu-item::before {
    content: '';
    position: absolute;
    left: 3px;
    top: 14px;
    bottom: -24px;
    width: 2px;
    background: rgba(255, 255, 255, 0.05);
}
.edu-item:last-child::before {
    display: none;
}
.edu-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 4px;
}
.edu-item h4 {
    font-size: 1.05rem;
    margin-bottom: 2px;
}
.edu-inst {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 6px;
}
.edu-gpa {
    font-size: 0.85rem;
    font-family: var(--font-mono);
    color: var(--accent-cyan);
}

/* Code Terminal Card */
.terminal-card {
    padding: 0;
    background: var(--surface-darker);
    overflow: hidden;
}
.terminal-header {
    background: rgba(15, 23, 42, 0.8);
    height: 38px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    border-bottom: 1px solid var(--border-glass);
    gap: 6px;
}
.terminal-header .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }
.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 10px;
}
.terminal-body {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-slate);
    overflow-x: auto;
}

/* Python Syntax Highlighting Mock */
.keyword { color: #f43f5e; }
.class-name { color: #a855f7; }
.function { color: #3b82f6; }
.string { color: #10b981; }
.comment { color: var(--text-dark); }

/* ==========================================================================
   SECTION 2 — IMPACT DASHBOARD
   ========================================================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.dashboard-metric {
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    padding: 32px;
    border-radius: 16px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}
.dashboard-metric:hover {
    border-color: var(--border-glass-active);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.05);
}

.metric-value {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text-slate) 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.metric-label {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.metric-sub {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 20px;
}
.metric-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
    overflow: hidden;
}
.bar-fill {
    height: 100%;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.visible .bar-fill {
    transform: scaleX(1);
}

/* ==========================================================================
   SECTION 3 — ENGINEERING DNA (NEURAL NET)
   ========================================================================== */

.dna-interactive-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: stretch;
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(16px);
}

.dna-details-panel {
    padding: 48px;
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 400px;
    transition: var(--transition-smooth);
    background: rgba(3, 7, 18, 0.4);
}

.details-placeholder {
    text-align: center;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}
.pulse-radar {
    width: 40px;
    height: 40px;
    border: 1px solid var(--accent-cyan);
    border-radius: 50%;
    position: relative;
    animation: radarRing 2s infinite;
}
.pulse-radar::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.dna-node-expanded-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-slate);
    margin-bottom: 12px;
}
.dna-node-expanded-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 24px;
}
.dna-node-metrics-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--accent-cyan);
    margin-bottom: 8px;
}
.dna-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.dna-tech-tag {
    background: rgba(34, 211, 238, 0.1);
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid rgba(34, 211, 238, 0.2);
}

.dna-canvas-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 450px;
    display: flex;
    justify-content: center;
    align-items: center;
}
#dna-network-canvas {
    width: 100%;
    height: 100%;
    cursor: pointer;
}

/* ==========================================================================
   SECTION 4 — FLAGSHIP SYSTEMS
   ========================================================================== */

.systems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.system-card {
    position: relative;
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    padding: 32px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-smooth);
}
.system-card:hover {
    border-color: var(--border-glass-active);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.system-card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: radial-gradient(circle at top, var(--glow-blue) 0%, transparent 80%);
    pointer-events: none;
    opacity: 0.7;
}

.system-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.system-number {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-dark);
}
.system-meta {
    display: flex;
    align-items: center;
    gap: 8px;
}
.status-indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}
.status-indicator.online {
    background: #10b981;
    box-shadow: 0 0 8px #10b981;
}
.system-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

.system-title {
    font-family: var(--font-display);
    font-size: 1.65rem;
    font-weight: 800;
    margin-bottom: 4px;
}
.system-tagline {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 24px;
}

.system-pipeline-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
    flex-grow: 1;
    margin-bottom: 32px;
}
.step-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    display: block;
    margin-bottom: 4px;
}
.step-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.system-tags-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}
.system-tags-grid span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.system-explore-btn {
    width: 100%;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-slate);
    padding: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
}
.system-explore-btn:hover {
    border-color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.05);
    color: var(--accent-cyan);
}

/* ==========================================================================
   SECTION 5 — ARCHITECTURE GALLERY
   ========================================================================== */

.gallery-wrapper {
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(16px);
}

.gallery-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-glass);
    background: rgba(3, 7, 18, 0.4);
}
.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 18px;
    cursor: pointer;
    transition: var(--transition-fast);
}
.tab-btn:hover {
    color: var(--text-slate);
}
.tab-btn.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.02);
}

.gallery-display-panel {
    position: relative;
    padding: 40px;
    background: var(--surface-darker);
    min-height: 480px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.diagram-container {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
}
.diagram-container.active {
    display: flex;
}

.svg-diagram-wrapper {
    width: 100%;
    max-width: 900px;
    height: 320px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* SVG Custom Styling for Diagrams */
.svg-diag {
    width: 100%;
    height: 100%;
}
.diag-node {
    cursor: pointer;
    transition: var(--transition-fast);
}
.diag-node:hover {
    filter: drop-shadow(0 0 8px currentColor);
}
.diag-line {
    stroke-dasharray: 6;
    animation: pipelineFlow 20s linear infinite;
}
.packet {
    animation: flowPacket 3s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.diagram-legend {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 32px;
}
.legend-node {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.node-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.node-color.query { background: #3b82f6; }
.node-color.agent { background: #a855f7; }
.node-color.db { background: #10b981; }
.node-color.engine { background: #eab308; }
.node-color.output { background: #22d3ee; }

/* ==========================================================================
   SECTION 6 — ENGINEERING JOURNEY (TIMELINE)
   ========================================================================== */

.journey-timeline {
    position: relative;
    max-width: 800px;
    margin: 48px auto 0 auto;
}

.journey-node-line {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-cyan) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.journey-card {
    display: flex;
    justify-content: flex-end;
    position: relative;
    width: 50%;
    padding-right: 48px;
    margin-bottom: 40px;
    box-sizing: border-box;
}
.journey-card:nth-child(even) {
    align-self: flex-end;
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 48px;
    margin-left: 50%;
}

.journey-badge {
    position: absolute;
    right: -18px;
    top: 4px;
    width: 36px;
    height: 36px;
    background: var(--surface-darker);
    border: 2px solid var(--accent-cyan);
    border-radius: 50%;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.2);
}
.journey-card:nth-child(even) .journey-badge {
    left: -18px;
    right: auto;
}

.journey-info {
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 24px;
    backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}
.journey-card:hover .journey-info {
    border-color: var(--border-glass-active);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}
.journey-info h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}
.journey-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}
.journey-meta {
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
}

/* ==========================================================================
   SECTION 7 — RECOGNITION
   ========================================================================== */

.recognition-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.recognition-card {
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 32px;
    backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}
.recognition-card:hover {
    border-color: var(--border-glass-active);
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}
.rec-icon {
    color: var(--accent-cyan);
    margin-bottom: 24px;
}
.rec-provider {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}
.recognition-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 12px;
}
.recognition-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* ==========================================================================
   SECTION 8 — DIGITAL PRESENCE (COMMAND CENTER)
   ========================================================================== */

.command-center-terminal {
    background: var(--surface-darker);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
}

.terminal-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-bottom: 1px solid var(--border-glass);
    min-height: 280px;
}

.terminal-output {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    overflow-y: auto;
    max-height: 280px;
}
.terminal-output div {
    margin-bottom: 6px;
}
.terminal-output .highlight {
    color: var(--accent-cyan);
}
.terminal-output .error {
    color: #ef4444;
}
.terminal-output .success {
    color: #10b981;
}

.terminal-visual-panel {
    border-left: 1px solid var(--border-glass);
    padding: 20px;
    background: rgba(15, 23, 42, 0.25);
    display: flex;
    flex-direction: column;
}
.visual-header {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dark);
    margin-bottom: 12px;
}
#terminal-graph-canvas {
    width: 100%;
    flex-grow: 1;
}

.leetcode-stats-container {
    width: 100%;
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: var(--surface-darker);
}

#leetcode-stats-img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
}

.terminal-input-line {
    background: rgba(15, 23, 42, 0.5);
    display: flex;
    align-items: center;
    padding: 12px 20px;
    gap: 12px;
}
.prompt-symbol {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--primary-blue);
    user-select: none;
}
#terminal-cmd-input {
    flex-grow: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-slate);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* ==========================================================================
   SECTION 9 — LET'S BUILD SOMETHING REMARKABLE
   ========================================================================== */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.contact-details h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin-bottom: 16px;
}
.contact-details p {
    color: var(--text-muted);
    margin-bottom: 32px;
}

.opportunities-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}
.opportunities-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}
.opportunities-list li svg {
    color: var(--accent-cyan);
}

.personal-direct-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.direct-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}
.direct-link:hover {
    color: var(--text-slate);
}
.direct-link svg {
    color: var(--text-dark);
}

/* Glassmorphism Form */
.contact-form-glass {
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    padding: 40px;
    border-radius: 20px;
    backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.form-group label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}
.form-group input, .form-group textarea {
    background: rgba(3, 7, 18, 0.4);
    border: 1px solid var(--border-glass);
    padding: 14px 16px;
    border-radius: 8px;
    color: var(--text-slate);
    outline: none;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}
.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.05);
}

.submit-btn {
    position: relative;
    background: var(--primary-blue);
    border: none;
    color: white;
    padding: 14px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
    overflow: hidden;
}
.submit-btn:hover {
    background: #2563eb;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}
.btn-glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}
.submit-btn:hover .btn-glow {
    transform: translateX(100%);
}

.form-status {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-align: center;
}
.form-status.success { color: #10b981; }
.form-status.error { color: #ef4444; }

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
    border-top: 1px solid var(--border-glass);
    padding: 40px 24px;
    background: rgba(3, 7, 18, 0.8);
    position: relative;
    z-index: 10;
}
.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1rem;
}
.footer-note {
    color: var(--text-muted);
    font-size: 0.8rem;
}
.footer-links {
    display: flex;
    gap: 24px;
}
.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    transition: var(--transition-fast);
}
.footer-links a:hover {
    color: var(--text-slate);
}

/* ==========================================================================
   INTERACTIVE FLOATING AI CHATBOT WIDGET
   ========================================================================== */

.ai-widget-container {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 999;
}

.ai-toggle-button {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    border: none;
    color: white;
    cursor: pointer;
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}
.ai-toggle-button:hover {
    transform: scale(1.05);
}

.ai-icon-pulse {
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    border: 2px solid var(--accent-cyan);
    animation: corePulse 2s infinite;
}

.close-icon.hidden, .chat-icon.hidden {
    display: none;
}

/* Chat Window Box */
.ai-chat-box {
    position: absolute;
    bottom: 72px;
    right: 0;
    width: 360px;
    height: 500px;
    background: rgba(15, 23, 42, 0.75);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    transform-origin: bottom right;
}
.ai-chat-box.hidden {
    transform: scale(0.8) translateY(20px);
    opacity: 0;
    pointer-events: none;
}

.chat-header {
    background: rgba(3, 7, 18, 0.4);
    padding: 16px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.chat-agent-info {
    display: flex;
    align-items: center;
    gap: 12px;
}
.agent-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent-cyan);
    color: var(--bg-dark);
    font-weight: 700;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.chat-agent-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
}
.agent-status {
    font-size: 0.7rem;
    color: #10b981;
    display: block;
}
#chat-minimize {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.chat-body {
    flex-grow: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 0.85rem;
    max-width: 80%;
    line-height: 1.4;
}
.system-message {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    align-self: center;
    text-align: center;
    border: 1px solid var(--border-glass);
    max-width: 100%;
}
.user-msg {
    background: var(--primary-blue);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 2px;
}
.ai-msg {
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--border-glass);
    color: var(--text-slate);
    align-self: flex-start;
    border-bottom-left-radius: 2px;
}

/* Suggestion Chips */
.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}
.suggestion-chip {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    color: var(--text-slate);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
}
.suggestion-chip:hover {
    background: rgba(34, 211, 238, 0.08);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.chat-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-glass);
    background: rgba(3, 7, 18, 0.4);
    display: flex;
    gap: 8px;
}
#chat-input {
    flex-grow: 1;
    background: rgba(3, 7, 18, 0.6);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--text-slate);
    outline: none;
    font-size: 0.85rem;
}
#chat-input:focus {
    border-color: var(--accent-cyan);
}
#chat-send-btn {
    background: var(--primary-blue);
    border: none;
    color: white;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}
#chat-send-btn:hover {
    background: #2563eb;
}

/* Typing indicator bubble */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    align-self: flex-start;
    border-bottom-left-radius: 2px;
}
.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: typingPulse 1s infinite alternate;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

/* ==========================================================================
   RESUME VIEWER MODAL CONTAINER
   ========================================================================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 24px;
    transition: opacity 0.3s ease;
}
.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-container {
    background: var(--surface-slate);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    width: 100%;
    max-width: 900px;
    height: 100%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-overlay:not(.hidden) .modal-container {
    transform: scale(1);
}

.modal-header {
    background: var(--surface-darker);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header h3 {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-cyan);
}
.modal-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.modal-action-btn {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-slate);
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}
.modal-action-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-glass-active);
}
.modal-action-btn.primary {
    background: var(--primary-blue);
    border-color: transparent;
}
.modal-action-btn.primary:hover {
    background: #2563eb;
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.8rem;
    cursor: pointer;
    transition: var(--transition-fast);
    padding: 0 4px;
}
.modal-close-btn:hover {
    color: var(--text-slate);
}

.modal-body {
    flex-grow: 1;
    overflow-y: auto;
    padding: 40px;
    background: #f8fafc; /* Professional white-paper background for standard view */
    color: #0f172a;
}

/* ==========================================================================
   PRINTABLE DYNAMIC TYPESET RESUME (Matches LaTeX)
   ========================================================================== */

.resume-sheet {
    max-width: 800px;
    margin: 0 auto;
    font-family: 'Inter', sans-serif;
    font-size: 10.5pt;
    line-height: 1.4;
    color: #111;
}

.resume-header {
    text-align: center;
    margin-bottom: 20px;
}
.resume-header h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 22pt;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #000;
    margin-bottom: 6px;
}
.resume-meta {
    font-size: 9.5pt;
    color: #444;
    margin-bottom: 4px;
}
.resume-links a {
    color: #111;
    text-decoration: none;
    border-bottom: 1px solid #777;
    font-size: 9.5pt;
}

.resume-section-item {
    margin-bottom: 18px;
}
.resume-section-item h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 11pt;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #111;
    padding-bottom: 2px;
    margin-bottom: 8px;
    color: #000;
}

.resume-sub-heading {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    font-size: 9.5pt;
    margin-top: 8px;
}
.resume-sub-sub {
    display: flex;
    justify-content: space-between;
    font-size: 9pt;
    color: #333;
    margin-bottom: 4px;
}
.resume-sub-sub.italic {
    font-style: italic;
    color: #444;
}

.resume-bullets {
    margin-left: 18px;
    margin-bottom: 8px;
}
.resume-bullets li {
    font-size: 9pt;
    margin-bottom: 2px;
    color: #222;
}
.resume-bullets.no-margin {
    margin-top: 4px;
}

/* ==========================================================================
   PRINT CSS RULE OVERRIDES
   ========================================================================== */

@media print {
    body * {
        visibility: hidden;
    }
    #resume-print-area, #resume-print-area * {
        visibility: visible;
    }
    #resume-print-area {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        background: white !important;
        color: black !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    .resume-sheet {
        width: 100% !important;
        max-width: 100% !important;
        font-size: 10pt !important;
        line-height: 1.3 !important;
        color: #000 !important;
    }
    .resume-links a {
        color: #000 !important;
        border-bottom: none !important;
    }
}

/* ==========================================================================
   RESPONSIVE LAYOUTS (MOBILE-FIRST)
   ========================================================================== */

@media (max-width: 1024px) {
    .engineer-grid {
        grid-template-columns: 1fr;
    }
    .systems-grid {
        grid-template-columns: 1fr 1fr;
    }
    .dashboard-grid {
        grid-template-columns: 1fr 1fr;
    }
    .dna-interactive-container {
        grid-template-columns: 1fr;
    }
    .dna-details-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-glass);
        min-height: auto;
        padding: 30px;
    }
    .terminal-workspace {
        grid-template-columns: 1fr;
    }
    .terminal-visual-panel {
        border-left: none;
        border-top: 1px solid var(--border-glass);
        height: 200px;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .site-header {
        height: 60px;
    }
    .main-nav {
        display: none; /* Mobile navigation toggle can be added or simple menu */
    }
    .hero-typewriter {
        font-size: 2.8rem;
        min-height: 7rem;
    }
    .brand-statement {
        font-size: 1.05rem;
    }
    .brand-titles {
        flex-direction: column;
        gap: 6px;
        margin-bottom: 24px;
    }
    .title-divider {
        display: none;
    }
    .systems-grid {
        grid-template-columns: 1fr;
    }
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .recognition-grid {
        grid-template-columns: 1fr;
    }
    .journey-node-line {
        left: 20px;
    }
    .journey-card {
        width: 100%;
        padding-left: 50px;
        padding-right: 0;
        justify-content: flex-start;
    }
    .journey-card:nth-child(even) {
        margin-left: 0;
        padding-left: 50px;
    }
    .journey-badge {
        left: 2px !important;
    }
    .ai-chat-box {
        width: calc(100vw - 64px);
        height: 450px;
    }
    .modal-body {
        padding: 20px;
    }
    .modal-header-actions button span {
        display: none; /* Hide label, keep icon for space */
    }
}