/* ANTI GRAVITY — Design System & Stylesheet */

:root {
  --color-space-black: #030712;
  --color-void-dark: #0b0f19;
  --color-glass-surface: rgba(17, 24, 39, 0.65);
  --color-glass-border: rgba(255, 255, 255, 0.08);
  --color-glass-hover: rgba(6, 182, 212, 0.15);
  --color-starlight-white: #f9fafb;
  --color-muted-text: #9ca3af;
  --color-dim-text: #6b7280;
  --color-nebula-cyan: #06b6d4;
  --color-quantum-violet: #8b5cf6;
  --color-gravity-amber: #f59e0b;
  --color-success-green: #10b981;

  --font-display: 'Space Grotesk', -apple-system, sans-serif;
  --font-heading: 'Outfit', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-width: 1280px;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  font-family: var(--font-body);
  background-color: var(--color-space-black);
  color: var(--color-starlight-white);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
}

/* Vibrant Glowing Headings & Section Titles */
.heading-gradient, .section-title, h1.hero-title {
  background: linear-gradient(135deg, #ffffff 0%, #38bdf8 40%, #06b6d4 75%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 16px rgba(6, 182, 212, 0.5)) drop-shadow(0 0 35px rgba(139, 92, 246, 0.35));
  display: inline-block;
  letter-spacing: -0.02em;
  animation: title-glow-pulse 4s ease-in-out infinite alternate;
}

@keyframes title-glow-pulse {
  0% {
    filter: drop-shadow(0 0 12px rgba(6, 182, 212, 0.4)) drop-shadow(0 0 25px rgba(139, 92, 246, 0.25));
  }
  100% {
    filter: drop-shadow(0 0 22px rgba(6, 182, 212, 0.75)) drop-shadow(0 0 45px rgba(139, 92, 246, 0.5));
  }
}

#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

#custom-cursor, #custom-cursor-dot {
  display: none !important;
}

.glass-panel {
  background: var(--color-glass-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-glass-border);
  border-radius: 16px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.glass-panel:hover {
  border-color: rgba(6, 182, 212, 0.3);
  box-shadow: 0 12px 40px 0 rgba(6, 182, 212, 0.12);
}

h1, h2, h3, .font-display {
  font-family: var(--font-display);
}

.heading-gradient {
  background: linear-gradient(135deg, #ffffff 0%, var(--color-starlight-white) 40%, var(--color-nebula-cyan) 80%, var(--color-quantum-violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--color-nebula-cyan), var(--color-quantum-violet));
  color: var(--color-starlight-white);
  padding: 12px 24px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
  transition: transform var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-glass-surface);
  color: var(--color-starlight-white);
  padding: 12px 24px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--color-glass-border);
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--color-nebula-cyan);
  transform: translateY(-2px);
}

.telemetry-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.2);
  color: var(--color-nebula-cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-nebula-cyan);
  box-shadow: 0 0 8px var(--color-nebula-cyan);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.5; }
  100% { transform: scale(0.95); opacity: 1; }
}

/* ==============================================================================
   PREMIUM VISUAL EFFECTS & ANIMATIONS SUITE (VAIBHAV-INSPIRED EXCELLENCE)
   ============================================================================== */

/* 1. Top Scroll Reading Progress Bar */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-nebula-cyan), var(--color-quantum-violet), #ef4444);
  box-shadow: 0 0 10px var(--color-nebula-cyan);
  z-index: 999999;
  transition: width 0.1s ease-out;
}

/* 2. 3D Moving Perspective Preloader Grid Floor */
.preloader-grid {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background-image: 
    linear-gradient(rgba(6, 182, 212, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.15) 1px, transparent 1px);
  background-size: 50px 50px;
  transform: perspective(600px) rotateX(65deg);
  animation: gridMove 20s linear infinite;
  pointer-events: none;
  opacity: 0.6;
}

@keyframes gridMove {
  0% { transform: perspective(600px) rotateX(65deg) translateY(0); }
  100% { transform: perspective(600px) rotateX(65deg) translateY(50px); }
}

/* 3. Floating Ambient Gradient Orbs */
.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
  will-change: transform;
}

.orb-1 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.4) 0%, rgba(6, 182, 212, 0) 70%);
  top: -50px;
  left: -50px;
  animation: floatOrb 12s ease-in-out infinite alternate;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.35) 0%, rgba(139, 92, 246, 0) 70%);
  bottom: 0;
  right: -50px;
  animation: floatOrb 16s ease-in-out infinite alternate-reverse;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -40px) scale(1.1); }
  100% { transform: translate(-20px, 30px) scale(0.95); }
}

/* 4. Live Sound-Wave Focus Mode Equalizer Widget */
.music-widget {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  border-radius: 14px;
  background: rgba(5, 8, 22, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(6, 182, 212, 0.35);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  margin-top: 10px;
  width: 100%;
}

.sound-wave {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 18px;
}

.sound-wave span {
  width: 3px;
  border-radius: 3px;
  background: var(--color-nebula-cyan);
}

.sound-wave span:nth-child(1) { height: 14px; animation: soundBounce 0.9s ease-in-out infinite alternate; }
.sound-wave span:nth-child(2) { height: 18px; animation: soundBounce 1.2s ease-in-out infinite alternate 0.2s; background: var(--color-quantum-violet); }
.sound-wave span:nth-child(3) { height: 10px; animation: soundBounce 0.8s ease-in-out infinite alternate 0.4s; }
.sound-wave span:nth-child(4) { height: 16px; animation: soundBounce 1.1s ease-in-out infinite alternate 0.1s; background: var(--color-quantum-violet); }
.sound-wave span:nth-child(5) { height: 12px; animation: soundBounce 1.0s ease-in-out infinite alternate 0.3s; }

@keyframes soundBounce {
  0% { height: 4px; }
  100% { height: 18px; }
}

/* 5. Floating Tech Badges */
.floating-badge {
  position: absolute;
  padding: 6px 12px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(6, 182, 212, 0.4);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.25);
  color: var(--color-starlight-white);
  z-index: 15;
  animation: floatBadge 4s ease-in-out infinite alternate;
}

.badge-top-right {
  top: -10px;
  right: -10px;
}

.badge-bottom-left {
  bottom: 20px;
  left: -15px;
  animation-delay: -2s;
}

@keyframes floatBadge {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

/* 6. GPU-Accelerated 3D Tilt Card Behavior */
.tilt-card {
  transition: transform 0.15s cubic-bezier(0.03, 0.98, 0.52, 0.99), box-shadow 0.3s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.tilt-card:hover {
  box-shadow: 0 20px 40px -10px rgba(6, 182, 212, 0.35);
}

/* 7. Solid 3D Card Flip Mechanism (Never Vanishes) */
.flip-card {
  background-color: transparent;
  perspective: 1000px;
  height: 200px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.65s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 22px;
  box-sizing: border-box;
  overflow: hidden;
  background: rgba(11, 15, 25, 0.95) !important;
  backdrop-filter: blur(20px) !important;
  border: 1px solid rgba(6, 182, 212, 0.35) !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 20px rgba(6, 182, 212, 0.15) !important;
}

.flip-card-back {
  transform: rotateY(180deg);
  background: rgba(15, 23, 42, 0.96) !important;
  border-color: rgba(139, 92, 246, 0.6) !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), 0 0 25px rgba(139, 92, 246, 0.3) !important;
}

.topic-watermark-icon {
  position: absolute;
  right: -10px;
  bottom: -10px;
  font-size: 5.5rem;
  opacity: 0.12;
  color: var(--color-nebula-cyan);
  pointer-events: none;
  z-index: 1;
}

/* 8. Project Category Filter Buttons */
.filter-btn {
  padding: 8px 18px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-muted-text);
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-btn:hover, .filter-btn.active {
  background: rgba(6, 182, 212, 0.15);
  border-color: var(--color-nebula-cyan);
  color: var(--color-nebula-cyan);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
}

/* 9. Intersection Observer Scroll Reveal */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

#hud-header {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: min(92%, 1100px);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 28px;
  border-radius: 20px;
  background: rgba(11, 15, 25, 0.78);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(6, 182, 212, 0.4);
  box-shadow: 
    0 20px 50px -10px rgba(0, 0, 0, 0.8),
    0 10px 30px -5px rgba(6, 182, 212, 0.35),
    0 0 20px rgba(139, 92, 246, 0.2),
    inset 0 1px 1px rgba(255, 255, 255, 0.3),
    inset 0 -1px 2px rgba(6, 182, 212, 0.2);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

#hud-header:hover {
  border-color: rgba(6, 182, 212, 0.75);
  box-shadow: 
    0 28px 65px -10px rgba(0, 0, 0, 0.9),
    0 15px 45px -5px rgba(6, 182, 212, 0.5),
    0 0 35px rgba(139, 92, 246, 0.35),
    inset 0 1px 2px rgba(255, 255, 255, 0.45);
  transform: translateX(-50%) translateY(-2px);
}

.hud-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-starlight-white);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-shadow: 0 0 12px rgba(6, 182, 212, 0.5);
}

.hud-logo-glyph {
  font-size: 1.35rem;
  color: var(--color-nebula-cyan);
  filter: drop-shadow(0 0 8px var(--color-nebula-cyan));
}

.hud-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.hud-nav a {
  color: var(--color-muted-text);
  text-decoration: none;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.hud-nav a:hover {
  color: var(--color-starlight-white);
  background: rgba(6, 182, 212, 0.12);
  border-color: rgba(6, 182, 212, 0.35);
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.7);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.25);
}

.hud-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toggle-recruiter {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--color-gravity-amber);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  cursor: pointer;
}

.container {
  width: min(90%, var(--max-width));
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 100px 0;
}

#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 140px;
  text-align: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  max-width: 850px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--color-muted-text);
  max-width: 680px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

#recruiter-fasttrack {
  display: none;
  background: rgba(245, 158, 11, 0.05);
  border-color: rgba(245, 158, 11, 0.25);
  padding: 24px;
  margin-top: 30px;
}

.recruiter-mode-active #recruiter-fasttrack {
  display: block;
}

.recruiter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 16px;
}

.recruiter-card {
  background: rgba(3, 7, 18, 0.6);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.section-header {
  margin-bottom: 50px;
  text-align: center;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  margin-top: 8px;
}

.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.filter-chip {
  padding: 8px 20px;
  border-radius: 100px;
  background: var(--color-glass-surface);
  border: 1px solid var(--color-glass-border);
  color: var(--color-muted-text);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  cursor: pointer;
}

.filter-chip.active, .filter-chip:hover {
  border-color: var(--color-nebula-cyan);
  color: var(--color-nebula-cyan);
  background: rgba(6, 182, 212, 0.1);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.project-card {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 380px;
}

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

.tag-mini {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-muted-text);
}

.project-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.project-desc {
  color: var(--color-muted-text);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.project-metrics {
  display: flex;
  gap: 16px;
  padding: 12px;
  background: rgba(3, 7, 18, 0.4);
  border-radius: 8px;
  margin-bottom: 20px;
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-nebula-cyan);
}

.metric-lbl {
  font-size: 0.7rem;
  color: var(--color-dim-text);
}

.project-links {
  display: flex;
  gap: 12px;
}

.sandbox-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 36px;
}

@media (max-width: 900px) {
  .sandbox-container { grid-template-columns: 1fr; }
}

.sandbox-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.control-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-muted-text);
}

input[type="range"] {
  accent-color: var(--color-nebula-cyan);
}

#loss-chart {
  width: 100%;
  height: 220px;
  background: rgba(3, 7, 18, 0.7);
  border-radius: 8px;
  border: 1px solid var(--color-glass-border);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.skill-category {
  padding: 24px;
}

.skill-category-title {
  font-size: 1.1rem;
  color: var(--color-nebula-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-node {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-glass-border);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

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

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-nebula-cyan), var(--color-quantum-violet), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 56px;
  margin-bottom: 40px;
}

.timeline-dot {
  position: absolute;
  left: 13px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-space-black);
  border: 2px solid var(--color-nebula-cyan);
}

.timeline-card {
  padding: 24px;
}

#terminal-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(12px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#terminal-modal.open, #terminal-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.terminal-window {
  width: min(90%, 800px);
  height: 500px;
  background: #050914;
  border: 1px solid rgba(6, 182, 212, 0.4);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--font-mono);
}

.terminal-header {
  background: rgba(255, 255, 255, 0.05);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-buttons {
  display: flex;
  gap: 8px;
}

.term-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.term-close { background: #ef4444; cursor: pointer; }
.term-min { background: #f59e0b; }
.term-max { background: #10b981; }

.terminal-body {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  color: var(--color-nebula-cyan);
  font-size: 0.9rem;
}

.terminal-line {
  margin-bottom: 8px;
}

.terminal-prompt {
  color: var(--color-quantum-violet);
  margin-right: 8px;
}

.terminal-input-line {
  display: flex;
  align-items: center;
}

.terminal-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-starlight-white);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  width: 100%;
}

#toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--color-void-dark);
  border: 1px solid var(--color-nebula-cyan);
  color: var(--color-starlight-white);
  padding: 12px 24px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  z-index: 10000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

#toast.show {
  transform: translateY(0);
  opacity: 1;
}

footer {
  border-top: 1px solid var(--color-glass-border);
  padding: 40px 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-dim-text);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
.mobile-only-hero-portrait {
  display: none;
}

/* ==============================================================================
   ANTI GRAVITY PORTFOLIO — OPTIMIZED MOBILE DESIGN SYSTEM
   Media Query Breakpoints: max-width: 768px & max-width: 480px
   ============================================================================== */

@media (max-width: 991px) {
  /* 1. Universal Box Model & Viewport Boundaries */
  *, *::before, *::after {
    box-sizing: border-box !important;
  }

  html, body {
    overflow-x: hidden !important;
    width: 100% !important;
    max-width: 100% !important;
    position: relative;
    -webkit-tap-highlight-color: transparent;
  }

  .container {
    padding-left: 16px !important;
    padding-right: 16px !important;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  section {
    padding: 40px 0 !important;
  }

  /* 2. Glassmorphic Mobile Header & Floating Nav Bar (#hud-header) */
  #hud-header {
    position: fixed !important;
    top: 8px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: 92% !important;
    max-width: 440px !important;
    padding: 8px 10px !important;
    flex-direction: column !important;
    gap: 6px !important;
    align-items: center !important;
    justify-content: center !important;
    border-radius: 20px !important;
    background: rgba(11, 15, 25, 0.95) !important;
    backdrop-filter: blur(24px) saturate(180%) !important;
    -webkit-backdrop-filter: blur(24px) saturate(180%) !important;
    border: 1px solid rgba(6, 182, 212, 0.45) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.85), 0 0 20px rgba(6, 182, 212, 0.3) !important;
    z-index: 10000 !important;
    margin: 0 auto !important;
  }

  .hud-logo {
    font-size: 0.85rem !important;
    letter-spacing: 0.5px !important;
    text-align: center !important;
    display: block !important;
    margin: 0 auto !important;
    padding: 0 !important;
  }

  nav, .hud-nav {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    white-space: nowrap !important;
    gap: 6px !important;
    padding: 2px 2px 4px 2px !important;
    width: 100% !important;
    justify-content: space-between !important;
    align-items: center !important;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .hud-nav::-webkit-scrollbar {
    display: none !important;
  }

  .hud-nav li {
    display: inline-block !important;
    margin: 0 !important;
    flex-shrink: 0 !important;
  }

  .hud-nav li a {
    font-size: 0.72rem !important;
    padding: 5px 10px !important;
    background: rgba(255, 255, 255, 0.08) !important;
    border-radius: 16px !important;
    border: 1px solid rgba(255, 255, 255, 0.14) !important;
    color: rgba(255, 255, 255, 0.95) !important;
    font-weight: 600 !important;
    white-space: nowrap !important;
    display: inline-block !important;
    flex-shrink: 0 !important;
    transition: all 0.2s ease !important;
  }

  .hud-nav li a:active, .hud-nav li a:focus, .hud-nav li a.active {
    color: var(--color-nebula-cyan) !important;
    border-color: rgba(6, 182, 212, 0.5) !important;
    background: rgba(6, 182, 212, 0.18) !important;
  }

  .hud-actions {
    display: none !important;
  }

  /* 3. Hero Section Stack & Mobile Centered Layout ("Middle Middle") */
  #hero {
    padding-top: 110px !important;
    margin-top: 0 !important;
    text-align: center !important;
    width: 100% !important;
    max-width: 100% !important;
    overflow-x: hidden !important;
  }

  .hero-left-column {
    align-items: center !important;
    text-align: center !important;
  }

  /* Force override any inline style="text-align: left" or "align-items: flex-start" on mobile */
  [style*="text-align: left"] {
    text-align: center !important;
  }
  [style*="align-items: flex-start"] {
    align-items: center !important;
    text-align: center !important;
  }
  [style*="justify-content: flex-start"] {
    justify-content: center !important;
  }

  #hero h1, .hero-title, h1 {
    font-size: clamp(1.45rem, 5.2vw, 2.1rem) !important;
    text-align: center !important;
    line-height: 1.3 !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 auto 12px auto !important;
    word-break: break-word !important;
    hyphens: auto !important;
  }

  #hero p, .hero-subtitle, p {
    font-size: 0.88rem !important;
    text-align: center !important;
    line-height: 1.6 !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 auto 16px auto !important;
    word-break: break-word !important;
    color: rgba(249, 250, 251, 0.85) !important;
  }

  .hero-portrait-showcase-container {
    display: block !important;
    width: 100% !important;
    max-width: 280px !important;
    margin: 16px auto !important;
  }

  #hero .hero-actions {
    order: 4 !important;
    width: 100% !important;
    justify-content: center !important;
    margin: 0 auto !important;
  }

  h1 {
    font-size: clamp(1.8rem, 6vw, 2.5rem) !important;
    text-align: center !important;
    line-height: 1.25 !important;
  }

  h2 {
    font-size: 1.45rem !important;
    line-height: 1.3 !important;
    text-align: center !important;
  }

  /* 4. Preloader Scaled Overlay */
  .preloader-counter-huge {
    font-size: 3.2rem !important;
  }

  .preloader-badge-tag {
    font-size: 0.68rem !important;
    padding: 4px 12px !important;
  }

  .preloader-info-row {
    font-size: 0.72rem !important;
    flex-wrap: wrap !important;
    justify-content: center !important;
  }

  /* 5. Mobile Rectangular Cards - Fit 100% Edge-to-Edge to Phone Screen Width */
  div[style*="grid-template-columns"],
  div[style*="minmax(320px"],
  div[style*="minmax(280px"],
  div[style*="minmax(220px"],
  .projects-grid,
  #projects-container,
  .skills-grid,
  .contact-grid {
    display: flex !important;
    flex-direction: column !important;
    gap: 16px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  div[style*="repeat(3, 1fr)"] {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 8px !important;
    width: 100% !important;
  }

  .glass-panel, .glass-card, .project-card, .skill-category, .timeline-card {
    padding: 16px !important;
    border-radius: 14px !important;
    background: rgba(10, 15, 30, 0.8) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .project-metrics {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 8px !important;
  }

  .metric-pill {
    padding: 8px !important;
    border-radius: 8px !important;
    font-size: 0.8rem !important;
  }

  /* 6. Buttons & Touch Action Target */
  .hero-buttons, .btn-group, div[style*="display: flex; gap:"] {
    flex-direction: column !important;
    width: 100% !important;
    gap: 10px !important;
  }

  .btn, button, a.btn {
    width: 100% !important;
    justify-content: center !important;
    padding: 12px 16px !important;
    font-size: 0.88rem !important;
    border-radius: 10px !important;
    box-sizing: border-box !important;
  }

  /* 7. Footer Layout */
  .footer-content {
    flex-direction: column !important;
    align-items: center !important;
    text-align: center !important;
    gap: 12px !important;
  }

  /* 8. Touch Active Feedback */
  .btn:active, .glass-card:active, .nav-link:active {
    transform: scale(0.98) !important;
  }
}

@media (max-width: 480px) {
  h1, .hero-title {
    font-size: 1.65rem !important;
  }

  h2 {
    font-size: 1.3rem !important;
  }

  .hero-portrait-wrapper, .portrait-card {
    width: 140px !important;
    height: 140px !important;
  }

  .container {
    padding-left: 14px !important;
    padding-right: 14px !important;
  }
}

/* ==========================================================================
   ULTRA-WIDE DISPLAY & LARGE MONITOR RESPONSIVE SCALING (TASK 2)
   ========================================================================== */
@media (min-width: 1600px) {
  :root {
    --max-width: 1536px;
  }
  .container, main, section {
    max-width: 1536px !important;
    margin-left: auto !important;
    margin-right: auto !important;
  }
}

/* ==========================================================================
   ACCESSIBILITY & FOCUS VISIBLE & REDUCED MOTION (TASK 6)
   ========================================================================== */
:focus-visible {
  outline: 2px solid #06b6d4 !important;
  outline-offset: 3px !important;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}