/* ==========================================================================
   Surya Teja Anupindi Portfolio Stylesheet - Extravagant Cybernetic Theme
   ========================================================================== */

/* Color & Typography Definitions */
:root {
    --bg-void: #030712;
    --bg-void-alt: #0b1329;
    --hud-glass: rgba(10, 18, 40, 0.45);
    --hud-glass-solid: rgba(10, 18, 40, 0.85);
    --border-glow: rgba(0, 240, 255, 0.15);
    
    /* Neon Palettes */
    --neon-cyan: #00f0ff;
    --neon-cyan-glow: rgba(0, 240, 255, 0.4);
    --neon-violet: #a78bfa;
    --neon-violet-glow: rgba(167, 139, 250, 0.4);
    --neon-rose: #f43f5e;
    --neon-rose-glow: rgba(244, 63, 94, 0.4);
    --neon-emerald: #10b981;
    --neon-emerald-glow: rgba(16, 185, 129, 0.4);
    --neon-amber: #f59e0b;
    --neon-amber-glow: rgba(245, 158, 11, 0.4);
    
    /* Text colors */
    --text-primary: #f1f5f9;
    --text-muted: #94a3b8;
    --text-dark: #475569;
    
    /* Fonts */
    --font-sans: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Resets & Global Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--neon-cyan) var(--bg-void);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-void);
    color: var(--text-primary);
    font-family: var(--font-sans);
    overflow-x: hidden;
}

body {
    background-color: var(--bg-void);
    position: relative;
    min-height: 100vh;
}

/* Background Neural Net Canvas */
#neural-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.65;
}

/* Custom Cursor Glow */
#cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.04) 0%, rgba(167, 139, 250, 0.02) 50%, transparent 100%);
    pointer-events: none;
    z-index: 1;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

/* Layout Containers */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 2;
}

.small-container {
    max-width: 800px;
}

/* Scrollbar customization */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-void);
}
::-webkit-scrollbar-thumb {
    background: var(--neon-cyan);
    border-radius: 3px;
    box-shadow: 0 0 10px var(--neon-cyan-glow);
}

/* Typography & Helper Classes */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

p {
    color: var(--text-muted);
    line-height: 1.7;
}

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

.text-glow {
    color: var(--neon-cyan);
    text-shadow: 0 0 8px var(--neon-cyan-glow);
}
.text-glow-violet {
    color: var(--neon-violet);
    text-shadow: 0 0 8px var(--neon-violet-glow);
}
.text-glow-rose {
    color: var(--neon-rose);
    text-shadow: 0 0 8px var(--neon-rose-glow);
}
.text-glow-emerald {
    color: var(--neon-emerald);
    text-shadow: 0 0 8px var(--neon-emerald-glow);
}

.c-cyan { color: var(--neon-cyan); }
.c-violet { color: var(--neon-violet); }
.c-rose { color: var(--neon-rose); }
.c-green { color: var(--neon-emerald); }
.c-yellow { color: var(--neon-amber); }
.c-blue { color: #3b82f6; }
.c-gray { color: var(--text-dark); }

.hide { display: none !important; }

/* Buttons & Links */
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.btn-primary, .btn-secondary, .btn-glow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.6rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, #0099ff 100%);
    color: var(--bg-void);
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
    font-weight: 700;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    border-color: rgba(241, 245, 249, 0.15);
    color: var(--text-primary);
}
.btn-secondary:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
    transform: translateY(-2px);
}

.btn-glow {
    background: var(--hud-glass);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.1);
}
.btn-glow:hover {
    background: var(--neon-cyan);
    color: var(--bg-void);
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
    transform: translateY(-2px);
}

/* Glassmorphic Panel Core */
.glass-card {
    background: var(--hud-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(241, 245, 249, 0.08);
    border-radius: 12px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: var(--transition-smooth);
}
.glass-card:hover {
    border-color: rgba(0, 240, 255, 0.25);
    box-shadow: 0 8px 32px 0 rgba(0, 240, 255, 0.05);
}

/* HUD System Headers on Cards */
.hud-panel {
    border: 1px solid rgba(241, 245, 249, 0.08);
    background: rgba(8, 14, 30, 0.65);
    border-radius: 12px;
    overflow: hidden;
}

.panel-header {
    background: rgba(15, 23, 42, 0.8);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border-bottom: 1px solid rgba(241, 245, 249, 0.08);
}
.panel-header span[class^="dot-"] {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.dot-red { background-color: var(--neon-rose); }
.dot-yellow { background-color: var(--neon-amber); }
.dot-green { background-color: var(--neon-emerald); }

.panel-title {
    margin-left: 0.5rem;
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* HUD Header Navigation */
.hud-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(3, 7, 18, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(241, 245, 249, 0.06);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.logo-box {
    width: 32px;
    height: 32px;
    border: 1px solid var(--neon-cyan);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    font-weight: 700;
}
.logo-text {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.logo-text .accent {
    font-size: 0.8rem;
    color: var(--text-dark);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}
.nav-links a:hover, .nav-links a.active {
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan-glow);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}
.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

/* Sections Base */
section {
    padding: 8rem 0;
    position: relative;
    z-index: 2;
}

.section-header {
    margin-bottom: 4rem;
}
.section-header.center {
    text-align: center;
}
.section-tag {
    font-family: var(--font-mono);
    color: var(--neon-cyan);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    display: block;
    margin-bottom: 0.6rem;
}
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
}
.section-desc {
    margin-top: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================================================
   Hero Section Styling
   ========================================================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 150px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
}

.cyber-badge {
    display: inline-block;
    padding: 0.35rem 0.8rem;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.25);
    border-radius: 4px;
    color: var(--neon-cyan);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    margin-bottom: 1.5rem;
    animation: flash 3s infinite;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    max-width: 550px;
}

.hero-cta-group {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
}

/* Hero Widget Screen */
.hero-dashboard {
    height: 380px;
    display: flex;
    flex-direction: column;
}
.hero-dashboard .panel-body {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    font-size: 0.78rem;
    line-height: 1.6;
    background: rgba(3, 7, 18, 0.4);
}

.progress-container {
    width: 100%;
    height: 8px;
    background: rgba(241, 245, 249, 0.05);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.4rem 0;
}
.progress-bar-glow {
    height: 100%;
    background: linear-gradient(90deg, var(--neon-violet) 0%, var(--neon-cyan) 100%);
    box-shadow: 0 0 10px var(--neon-cyan-glow);
    border-radius: 4px;
    transition: width 0.8s ease-in-out;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: auto;
}
.metric-card {
    background: rgba(15, 23, 42, 0.45);
    border: 1px solid rgba(241, 245, 249, 0.05);
    border-radius: 8px;
    padding: 0.8rem;
    text-align: center;
}
.metric-val {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}
.metric-lbl {
    font-size: 0.62rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* ==========================================================================
   About Section Styling
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}
.about-text {
    padding: 2.5rem;
}
.about-text p {
    margin-bottom: 1.5rem;
}
.edu-pills {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
    margin-top: 2rem;
}
.edu-pill {
    background: rgba(15, 23, 42, 0.35);
    border-left: 3px solid var(--neon-cyan);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
}
.edu-pill h3 {
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}
.edu-pill p {
    font-size: 0.78rem;
    margin-bottom: 0;
}

.skills-card {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}
.skills-category h4 {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
    font-family: var(--font-mono);
}
.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}
.tag {
    padding: 0.35rem 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 4px;
    background: rgba(241, 245, 249, 0.03);
    border: 1px solid rgba(241, 245, 249, 0.08);
}
.tag-cyan {
    border-color: rgba(0, 240, 255, 0.2);
    color: var(--neon-cyan);
}
.tag-cyan:hover {
    background: rgba(0, 240, 255, 0.05);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}
.tag-violet {
    border-color: rgba(167, 139, 250, 0.2);
    color: var(--neon-violet);
}
.tag-violet:hover {
    background: rgba(167, 139, 250, 0.05);
    box-shadow: 0 0 10px rgba(167, 139, 250, 0.15);
}
.tag-rose {
    border-color: rgba(244, 63, 94, 0.2);
    color: var(--neon-rose);
}
.tag-rose:hover {
    background: rgba(244, 63, 94, 0.05);
    box-shadow: 0 0 10px rgba(244, 63, 94, 0.15);
}

/* ==========================================================================
   Playground Dashboard Layout
   ========================================================================== */
.playground-dashboard {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 2rem;
}

.playground-tabs {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.pg-tab {
    background: rgba(15, 23, 42, 0.35);
    border: 1px solid rgba(241, 245, 249, 0.05);
    border-radius: 8px;
    padding: 1rem 1.2rem;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: var(--transition-smooth);
}
.pg-tab .tab-icon {
    opacity: 0.6;
    transition: var(--transition-smooth);
}
.pg-tab:hover {
    color: var(--text-primary);
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(0, 240, 255, 0.25);
}
.pg-tab.active {
    background: rgba(0, 240, 255, 0.06);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.1);
}
.pg-tab.active .tab-icon {
    opacity: 1;
    color: var(--neon-cyan);
}

.playground-display {
    min-height: 520px;
    background: rgba(8, 14, 30, 0.8);
    backdrop-filter: blur(14px);
    display: flex;
    flex-direction: column;
}

.playground-content {
    display: none;
    padding: 2.2rem;
    flex-direction: column;
    gap: 1.8rem;
    height: 100%;
}
.playground-content.active {
    display: flex;
}

.pg-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.4rem;
}
.pg-info p {
    font-size: 0.92rem;
    max-width: 780px;
}

.query-selector {
    margin-top: 1.2rem;
    background: rgba(3, 7, 18, 0.4);
    padding: 1.2rem;
    border-radius: 8px;
    border: 1px solid rgba(241, 245, 249, 0.04);
}
.query-selector label {
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-family: var(--font-mono);
    display: block;
    margin-bottom: 0.6rem;
}
.input-btn-group {
    display: flex;
    gap: 1rem;
}
.form-input {
    flex-grow: 1;
    background: rgba(3, 7, 18, 0.8);
    border: 1px solid rgba(241, 245, 249, 0.1);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition-smooth);
}
.form-input:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}
textarea.form-input {
    resize: none;
}

/* ArgRAG Visualizer Flow */
.rag-pipeline-map {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(3, 7, 18, 0.45);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(241, 245, 249, 0.04);
}
.pipe-step {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    max-width: 20%;
}
.pipe-step.active .flow-box {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-cyan-glow);
    color: var(--neon-cyan);
}
.pipe-step.success-support .flow-box {
    border-color: var(--neon-emerald);
    box-shadow: 0 0 15px var(--neon-emerald-glow);
    color: var(--neon-emerald);
}
.pipe-step.success-attack .flow-box {
    border-color: var(--neon-rose);
    box-shadow: 0 0 15px var(--neon-rose-glow);
    color: var(--neon-rose);
}
.pipe-arrow {
    color: var(--text-dark);
    font-weight: 700;
}
.step-badge {
    font-size: 0.58rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    color: var(--text-muted);
}
.retrieval-flows {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.flow-box {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(241, 245, 249, 0.08);
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    font-size: 0.72rem;
    text-align: center;
    transition: var(--transition-smooth);
}

.output-console {
    border-radius: 8px;
    background: #02050b;
    border: 1px solid rgba(241, 245, 249, 0.05);
    overflow: hidden;
}
.console-hdr {
    background: rgba(15, 23, 42, 0.7);
    padding: 0.5rem 1rem;
    font-size: 0.68rem;
    color: var(--text-muted);
    border-bottom: 1px solid rgba(241, 245, 249, 0.05);
}
.console-body {
    padding: 1.2rem;
    font-size: 0.78rem;
    color: var(--text-muted);
    height: 110px;
    overflow-y: auto;
    white-space: pre-line;
    line-height: 1.6;
}

/* Play 2: EHR Predictor Grid styling */
.pg-columns-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
}
.ehr-inputs {
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}
.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.slider-group.horiz {
    flex-direction: row;
    align-items: center;
    gap: 1rem;
}
.slider-group.horiz label {
    margin-bottom: 0;
    white-space: nowrap;
}
.slider-group label {
    font-size: 0.82rem;
    font-weight: 500;
}
.custom-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(241, 245, 249, 0.1);
    outline: none;
}
.custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-void);
    border: 3px solid var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan);
    cursor: pointer;
    transition: var(--transition-smooth);
}
.custom-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.ehr-prediction {
    padding: 2.2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.8rem;
}
.gauge-wrapper {
    position: relative;
    width: 160px;
    height: 160px;
}
.risk-gauge {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}
.gauge-bg {
    fill: none;
    stroke: rgba(241, 245, 249, 0.05);
    stroke-width: 8;
}
.gauge-fill {
    fill: none;
    stroke: var(--neon-cyan);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 251.2;
    stroke-dashoffset: 213.5; /* updates with JS */
    transition: stroke-dashoffset 0.4s ease, stroke 0.4s ease;
}
.gauge-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    display: flex;
    flex-direction: column;
}
.gauge-value span:first-child {
    font-size: 2.2rem;
    font-weight: 700;
}
.risk-lbl {
    font-size: 0.58rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.prediction-alert {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(3, 7, 18, 0.4);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid rgba(241, 245, 249, 0.05);
}
.alert-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.alert-indicator.bg-green {
    background-color: var(--neon-emerald);
    box-shadow: 0 0 10px var(--neon-emerald);
}
.alert-indicator.bg-yellow {
    background-color: var(--neon-amber);
    box-shadow: 0 0 10px var(--neon-amber);
}
.alert-indicator.bg-red {
    background-color: var(--neon-rose);
    box-shadow: 0 0 10px var(--neon-rose);
    animation: flash 1.5s infinite;
}
.alert-status {
    font-size: 0.68rem;
    font-weight: 700;
}

.model-log {
    width: 100%;
    background: rgba(3, 7, 18, 0.4);
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.68rem;
    border: 1px solid rgba(241, 245, 249, 0.04);
}
.log-title {
    color: var(--text-dark);
    margin-bottom: 0.4rem;
}
.log-tokens {
    color: var(--text-muted);
    word-break: break-all;
}

/* Play 3: X-Ray Scanner styling */
.control-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1.2rem;
    background: rgba(3, 7, 18, 0.45);
    padding: 1.2rem;
    border-radius: 8px;
    border: 1px solid rgba(241, 245, 249, 0.04);
}
.btn-group-toggle {
    display: flex;
    background: rgba(2, 5, 14, 0.8);
    border: 1px solid rgba(241, 245, 249, 0.06);
    border-radius: 6px;
    padding: 0.2rem;
}
.toggle-btn {
    background: transparent;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-smooth);
}
.toggle-btn.active {
    background: var(--neon-cyan);
    color: var(--bg-void);
    font-weight: 700;
}

.xray-viewport {
    position: relative;
    width: 100%;
    max-width: 280px;
    height: 280px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(241, 245, 249, 0.1);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.8);
    margin: 0 auto;
}
.xray-base {
    width: 100%;
    height: 100%;
}
.scanline {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--neon-emerald);
    box-shadow: 0 0 12px var(--neon-emerald);
    z-index: 5;
    animation: scannerSweep 3s ease-in-out infinite;
}
.gradcam-overlay {
    position: absolute;
    inset: 0;
    mix-blend-mode: color-dodge;
    pointer-events: none;
    transition: opacity 0.2s ease;
    /* initial state gradient overlay */
    background: radial-gradient(circle at 45% 65%, rgba(244, 63, 94, 0.8) 0%, rgba(245, 158, 11, 0.5) 25%, transparent 60%);
    opacity: 0.7;
}

.xray-metrics {
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    font-size: 0.85rem;
}
.metric-row {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid rgba(241, 245, 249, 0.05);
    padding-bottom: 0.5rem;
}
.metric-row span:first-child {
    color: var(--text-muted);
}
.xray-findings {
    background: rgba(3, 7, 18, 0.4);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid rgba(241, 245, 249, 0.04);
}
.xray-findings strong {
    font-size: 0.72rem;
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.4rem;
    text-transform: uppercase;
}
.xray-findings p {
    font-size: 0.78rem;
    line-height: 1.5;
}

/* Play 4: Route Optimizer styling */
.canvas-container {
    position: relative;
    width: 100%;
    max-width: 320px;
    height: 280px;
    background: #02050b;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(241, 245, 249, 0.1);
    margin: 0 auto;
}
#route-canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: crosshair;
}
.canvas-instruction {
    position: absolute;
    bottom: 0.8rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.58rem;
    text-transform: uppercase;
    background: rgba(3, 7, 18, 0.85);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    border: 1px solid rgba(241, 245, 249, 0.08);
    pointer-events: none;
    color: var(--text-muted);
}
.btn-group-normal {
    display: flex;
    gap: 0.8rem;
}

.route-metrics {
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    font-size: 0.85rem;
}
.path-logs {
    background: rgba(3, 7, 18, 0.4);
    border-radius: 8px;
    padding: 0.8rem;
    border: 1px solid rgba(241, 245, 249, 0.04);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-height: 90px;
}
.path-logs strong {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.4rem;
}
.console-logs {
    font-size: 0.65rem;
    list-style: none;
    overflow-y: auto;
    max-height: 80px;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}
.console-logs li {
    color: var(--text-muted);
}

/* ==========================================================================
   Experience Section (Timeline)
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2.5rem;
}
.timeline::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 6px;
    width: 2px;
    height: 95%;
    background: linear-gradient(180deg, var(--neon-cyan) 0%, var(--neon-violet) 50%, rgba(244,63,94,0.1) 100%);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

.timeline-item {
    position: relative;
    margin-bottom: 3.5rem;
}
.timeline-dot {
    position: absolute;
    left: -2.5rem;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-void);
    border: 3px solid var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan);
    z-index: 5;
    transition: var(--transition-smooth);
}
.timeline-item:hover .timeline-dot {
    background: var(--neon-cyan);
    transform: scale(1.2);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
}
.timeline-date {
    color: var(--neon-cyan);
    font-weight: 700;
}
.timeline-body {
    padding: 1.8rem;
}
.timeline-body h3 {
    font-size: 1.25rem;
    margin-bottom: 0.2rem;
}
.role-desc {
    font-size: 0.88rem;
    color: var(--neon-violet);
    margin-bottom: 1.2rem;
    font-weight: 500;
}
.timeline-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}
.timeline-bullets li {
    position: relative;
    padding-left: 1.2rem;
    font-size: 0.92rem;
}
.timeline-bullets li::before {
    content: '⬡';
    position: absolute;
    left: 0;
    top: 1px;
    color: var(--neon-cyan);
    font-size: 0.72rem;
}

.tech-row {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}
.badge {
    padding: 0.25rem 0.6rem;
    background: rgba(167, 139, 250, 0.05);
    border: 1px solid rgba(167, 139, 250, 0.15);
    border-radius: 4px;
    color: var(--neon-violet);
    font-family: var(--font-mono);
    font-size: 0.68rem;
}

/* ==========================================================================
   Terminal Console Section
   ========================================================================== */
.terminal-container {
    max-width: 850px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
}
.terminal-header {
    background: rgba(15, 23, 42, 0.9);
    padding: 0.8rem 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(241, 245, 249, 0.06);
}
.header-elements {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.terminal-title {
    margin-left: 0.8rem;
    font-size: 0.72rem;
    color: var(--text-primary);
}
.system-status {
    font-size: 0.68rem;
    color: var(--text-dark);
}

.terminal-body {
    background: rgba(2, 5, 12, 0.95);
    padding: 1.8rem;
    height: 340px;
    overflow-y: auto;
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--text-muted);
}
.term-line {
    margin-bottom: 0.35rem;
    white-space: pre-wrap;
}

.terminal-input-wrapper {
    background: rgba(2, 5, 12, 0.98);
    padding: 0.8rem 1.8rem;
    border-top: 1px solid rgba(241, 245, 249, 0.04);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
}
.prompt {
    color: var(--neon-cyan);
    font-weight: 700;
}
#terminal-input {
    flex-grow: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* ==========================================================================
   Contact Form Section
   ========================================================================== */
.contact-card {
    padding: 3rem;
}

.cyber-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.form-group label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.full-width {
    width: 100%;
}

#form-response-console {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid var(--neon-emerald);
    padding: 1.2rem;
    border-radius: 8px;
    font-size: 0.82rem;
    margin-top: 1.5rem;
    text-align: center;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.hud-footer {
    padding: 3rem 0;
    border-top: 1px solid rgba(241, 245, 249, 0.05);
    background: rgba(3, 7, 18, 0.85);
}
.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.68rem;
    color: var(--text-dark);
}
.social-links {
    display: flex;
    gap: 1.5rem;
}
.social-link:hover {
    color: var(--neon-cyan);
}

/* ==========================================================================
   Keyframes & Animations
   ========================================================================== */
@keyframes flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes scannerSweep {
    0% { top: 0; }
    50% { top: calc(100% - 3px); }
    100% { top: 0; }
}

@keyframes pulse-cyan {
    0%, 100% { box-shadow: 0 0 10px var(--neon-cyan-glow); }
    50% { box-shadow: 0 0 25px var(--neon-cyan); }
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
    .playground-dashboard {
        grid-template-columns: 1fr;
    }
    .playground-tabs {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
    .pg-tab {
        white-space: nowrap;
    }
}

@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .hero-dashboard {
        max-width: 500px;
        margin: 0 auto;
        width: 100%;
        height: 340px;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 5rem 0;
    }
    .section-title {
        font-size: 2rem;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .pg-columns-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .xray-viewport {
        max-width: 240px;
        height: 240px;
    }
    .canvas-container {
        max-width: 100%;
        height: 240px;
    }
    .nav-links {
        display: none; /* simple mobile behavior toggle with JS */
    }
    .mobile-menu-btn {
        display: flex;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .contact-card {
        padding: 1.8rem;
    }
}