/* ==========================================================================
   Ali Nasser V4 — Apple VisionOS "Liquid Glass" Spatial Experience
   Aesthetic: Multi-layered Refractive Crystal Glass, Fluid Mesh, Chromatic Prisms
   ========================================================================== */

:root {
  /* Apple VisionOS Light "Crystal Liquid Glass" Theme */
  --liquid-bg: #f5f8fc;
  --liquid-bg-subtle: #ebf1f8;
  
  /* Multi-tier Glass Layers */
  --glass-surface: rgba(255, 255, 255, 0.65);
  --glass-surface-elevated: rgba(255, 255, 255, 0.82);
  --glass-surface-interactive: rgba(255, 255, 255, 0.92);
  
  --glass-border: rgba(255, 255, 255, 0.85);
  --glass-border-subtle: rgba(203, 213, 225, 0.45);
  --glass-border-glow: rgba(56, 189, 248, 0.55);
  --glass-prism-highlight: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(56,189,248,0.25) 50%, rgba(129,140,248,0.2) 100%);

  /* Apple Spatial Shadows & Inset Highlights */
  --glass-shadow: 
    0 20px 40px -15px rgba(15, 23, 42, 0.08),
    0 0 0 1px rgba(255, 255, 255, 0.8),
    inset 0 1.5px 2px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 2px 0 rgba(0, 0, 0, 0.04);

  --glass-shadow-hover: 
    0 30px 60px -15px rgba(37, 99, 235, 0.18),
    0 0 30px rgba(56, 189, 248, 0.2),
    0 0 0 1px rgba(56, 189, 248, 0.6),
    inset 0 2px 3px 0 rgba(255, 255, 255, 1),
    inset 0 -1.5px 2px 0 rgba(37, 99, 235, 0.1);

  --text-primary: #0a1128;
  --text-secondary: #334155;
  --text-tertiary: #64748b;

  --accent-apple-blue: #0071e3;
  --accent-apple-blue-hover: #0077ed;
  --accent-cyan: #0ea5e9;
  --accent-sky: #38bdf8;
  --accent-indigo: #4338ca;

  --grad-liquid-primary: linear-gradient(135deg, #0071e3 0%, #0ea5e9 60%, #06b6d4 100%);
  --grad-liquid-sheen: linear-gradient(180deg, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.1) 100%);

  --font-apple: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', monospace;

  --radius-xs: 8px;
  --radius-sm: 14px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;
  --radius-pill: 9999px;

  --blur-glass: 30px;
}

/* Apple VisionOS Dark "Obsidian Liquid Glass" Theme */
[data-theme="dark"] {
  --liquid-bg: #030712;
  --liquid-bg-subtle: #080f1e;

  --glass-surface: rgba(15, 23, 42, 0.6);
  --glass-surface-elevated: rgba(22, 33, 58, 0.75);
  --glass-surface-interactive: rgba(30, 45, 78, 0.85);

  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-subtle: rgba(51, 65, 85, 0.45);
  --glass-border-glow: rgba(56, 189, 248, 0.6);
  --glass-prism-highlight: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(56,189,248,0.3) 50%, rgba(129,140,248,0.2) 100%);

  --glass-shadow: 
    0 25px 50px -15px rgba(0, 0, 0, 0.65),
    0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 1px 1.5px 0 rgba(255, 255, 255, 0.2),
    inset 0 -1px 2px 0 rgba(0, 0, 0, 0.4);

  --glass-shadow-hover: 
    0 35px 70px -15px rgba(2, 132, 199, 0.35),
    0 0 35px rgba(56, 189, 248, 0.25),
    0 0 0 1px rgba(56, 189, 248, 0.5),
    inset 0 1.5px 2px 0 rgba(255, 255, 255, 0.35),
    inset 0 -1.5px 2px 0 rgba(14, 165, 233, 0.2);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;

  --accent-apple-blue: #2997ff;
  --accent-apple-blue-hover: #40a9ff;
  --accent-cyan: #38bdf8;
  --accent-sky: #00d2ff;
  --accent-indigo: #818cf8;

  --grad-liquid-primary: linear-gradient(135deg, #2997ff 0%, #00d2ff 60%, #38bdf8 100%);
  --grad-liquid-sheen: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.02) 100%);
}

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

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

body {
  font-family: var(--font-apple);
  background-color: var(--liquid-bg);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Liquid Canvas Background */
#liquid-3d-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
}

/* Floating Fluid Gradient Orbs */
.liquid-orbs-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.liquid-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  animation: float-orb 20s ease-in-out infinite alternate;
}

.orb-1 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #0071e3 0%, rgba(14, 165, 233, 0.4) 60%, transparent 80%);
  top: -10%;
  left: -5%;
}

.orb-2 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, #38bdf8 0%, rgba(99, 102, 241, 0.3) 60%, transparent 80%);
  bottom: 5%;
  right: -10%;
  animation-duration: 25s;
  animation-delay: -5s;
}

.orb-3 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #06b6d4 0%, rgba(37, 99, 235, 0.3) 60%, transparent 80%);
  top: 45%;
  left: 30%;
  animation-duration: 18s;
  animation-delay: -10s;
}

@keyframes float-orb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.1); }
  100% { transform: translate(-40px, 80px) scale(0.95); }
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* Typography & Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-apple);
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text-primary);
}

.liquid-text-gradient {
  background: var(--grad-liquid-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  filter: drop-shadow(0 2px 10px rgba(0, 113, 227, 0.25));
}

.liquid-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--accent-apple-blue);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: clamp(2.3rem, 4.2vw, 3.2rem);
  margin: 14px 0;
  font-weight: 800;
}

.section-header p {
  font-size: 1.15rem;
  color: var(--text-tertiary);
  max-width: 660px;
  margin: 0 auto;
}

/* ==========================================================================
   Apple VisionOS Floating Dynamic Island Navigation
   ========================================================================== */

.apple-hud-wrapper {
  position: fixed;
  top: 24px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  z-index: 1000;
  padding: 0 16px;
}

.apple-hud-nav {
  background: var(--glass-surface);
  backdrop-filter: blur(var(--blur-glass)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-glass)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  display: flex;
  align-items: center;
  gap: 22px;
  box-shadow: var(--glass-shadow);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.apple-hud-nav:hover {
  border-color: var(--glass-border-glow);
  box-shadow: var(--glass-shadow-hover);
}

.apple-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  text-decoration: none;
}

.apple-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1.5px solid var(--accent-apple-blue);
  object-fit: cover;
}

.apple-tag {
  font-size: 0.68rem;
  background: var(--grad-liquid-primary);
  color: #fff;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-weight: 700;
}

.apple-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.apple-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  transition: all 0.2s ease;
}

.apple-link:hover, .apple-link.active {
  color: var(--accent-apple-blue);
  background: rgba(0, 113, 227, 0.1);
}

.apple-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.apple-btn-icon {
  background: var(--glass-surface-interactive);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  min-width: 38px;
  min-height: 38px;
  max-width: 38px;
  max-height: 38px;
  aspect-ratio: 1 / 1;
  flex-shrink: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.25s ease;
  box-shadow: inset 0 1px 1px rgba(255,255,255,0.7);
}

.apple-btn-icon:hover {
  transform: scale(1.08);
  border-color: var(--accent-apple-blue);
  color: var(--accent-apple-blue);
}

/* Liquid Glass Buttons */
.btn-liquid {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.btn-liquid-primary {
  background: var(--grad-liquid-primary);
  color: #ffffff !important;
  box-shadow: 0 10px 25px -5px rgba(0, 113, 227, 0.4), inset 0 1.5px 2px rgba(255, 255, 255, 0.6);
}

.btn-liquid-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 18px 35px -5px rgba(0, 113, 227, 0.5), 0 0 25px rgba(56, 189, 248, 0.4);
}

.btn-liquid-glass {
  background: var(--glass-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--glass-border);
  color: var(--text-primary);
  box-shadow: var(--glass-shadow);
}

.btn-liquid-glass:hover {
  background: var(--glass-surface-interactive);
  border-color: var(--accent-apple-blue);
  color: var(--accent-apple-blue);
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow-hover);
}

/* ==========================================================================
   Liquid Glass Card System
   ========================================================================== */

.liquid-card {
  background: var(--glass-surface);
  backdrop-filter: blur(var(--blur-glass)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-glass)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 38px;
  box-shadow: var(--glass-shadow);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.liquid-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 40%;
  background: var(--grad-liquid-sheen);
  pointer-events: none;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.liquid-card:hover {
  border-color: var(--glass-border-glow);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-6px);
}

/* Dynamic Specular Liquid Glare */
.liquid-glare {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.4) 0%, rgba(56, 189, 248, 0.15) 30%, transparent 65%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.liquid-card:hover .liquid-glare {
  opacity: 1;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.liquid-hero {
  padding: 170px 0 100px;
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  scroll-margin-top: 100px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  align-items: center;
  gap: 60px;
}

.hero-title {
  font-size: clamp(2.8rem, 5.5vw, 4.4rem);
  line-height: 1.1;
  margin: 18px 0 20px;
  font-weight: 800;
}

.hero-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.liquid-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  backdrop-filter: blur(16px);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.6);
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 620px;
}

/* Liquid Avatar Frame */
.liquid-avatar-container {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.liquid-avatar-glass-frame {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: var(--glass-surface);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 2px solid var(--glass-border);
  box-shadow: var(--glass-shadow-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.liquid-avatar-img {
  width: 270px;
  height: 270px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 10px 30px rgba(0, 113, 227, 0.3);
}

.floating-glass-badge {
  position: absolute;
  background: var(--glass-surface-elevated);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-apple-blue);
  box-shadow: var(--glass-shadow);
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-top { top: -10px; right: -15px; }
.badge-bottom { bottom: -10px; left: -15px; }

/* ==========================================================================
   3D Quantum Lab Section
   ========================================================================== */

.quantum-section {
  padding: 100px 0;
  scroll-margin-top: 80px;
}

.quantum-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

#bloch-canvas-v4 {
  width: 100%;
  height: 330px;
  border-radius: var(--radius-lg);
  cursor: grab;
  background: rgba(0, 113, 227, 0.03);
}

#bloch-canvas-v4:active {
  cursor: grabbing;
}

.quantum-gate-btn {
  background: var(--glass-surface-interactive);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: inset 0 1px 1px rgba(255,255,255,0.7);
}

.quantum-gate-btn:hover {
  background: var(--grad-liquid-primary);
  color: #fff;
  border-color: transparent;
  transform: scale(1.05);
}

/* ==========================================================================
   AI & Software Engineering Section
   ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 32px;
}

.project-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--grad-liquid-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 22px;
  box-shadow: 0 10px 20px rgba(0, 113, 227, 0.3), inset 0 1px 1px rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   Robotics & Hardware Matrix
   ========================================================================== */

.hardware-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.schematic-glass {
  background: var(--glass-surface-elevated);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin: 18px 0;
  color: var(--accent-apple-blue);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* ==========================================================================
   Skills Matrix
   ========================================================================== */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.liquid-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--glass-surface-elevated);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-pill);
  margin: 8px 0 16px;
  overflow: hidden;
}

.liquid-progress-fill {
  height: 100%;
  background: var(--grad-liquid-primary);
  border-radius: var(--radius-pill);
  width: 0%;
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
}

/* ==========================================================================
   Certificates & Honors
   ========================================================================== */

.cert-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 40px;
}

.cert-img-liquid {
  border-radius: var(--radius-lg);
  border: 2px solid var(--glass-border);
  box-shadow: var(--glass-shadow-hover);
  transition: transform 0.3s ease;
}

.cert-img-liquid:hover {
  transform: scale(1.02);
}

/* ==========================================================================
   Essays Grid
   ========================================================================== */

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

/* ==========================================================================
   Contact Terminal
   ========================================================================== */

.contact-card {
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.social-pills-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

/* Footer */
.liquid-footer {
  padding: 40px 0;
  border-top: 1px solid var(--glass-border);
  font-size: 0.92rem;
  color: var(--text-tertiary);
  text-align: center;
}

/* ==========================================================================
   Apple VisionOS Liquid Glass Mobile Drawer & Toggle
   ========================================================================== */

.apple-mobile-toggle {
  display: none;
}

.apple-mobile-menu {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  left: 12px;
  right: 12px;
  max-width: 480px;
  margin: 0 auto;
  background: var(--glass-surface-elevated);
  backdrop-filter: blur(35px) saturate(190%);
  -webkit-backdrop-filter: blur(35px) saturate(190%);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 18px;
  box-shadow: 0 25px 60px -15px rgba(0, 113, 227, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.7);
  z-index: 1001;
  opacity: 0;
  transform: translateY(-12px) scale(0.96);
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.apple-mobile-menu.active {
  display: block;
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 16px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.mobile-nav-link i {
  color: var(--accent-apple-blue);
  width: 22px;
  text-align: center;
  font-size: 1rem;
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  background: rgba(0, 113, 227, 0.12);
  color: var(--accent-apple-blue);
  transform: translateX(4px);
}

.mobile-menu-footer {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--glass-border);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 992px) {
  .apple-links {
    display: none !important;
  }
  .desktop-cv-btn {
    display: none !important;
  }
  .apple-mobile-toggle {
    display: flex !important;
  }
  .apple-mobile-menu {
    display: block;
  }
  
  .apple-hud-wrapper {
    top: 14px;
    padding: 0 14px;
  }
  .apple-hud-nav {
    width: 100%;
    justify-content: space-between;
    padding: 8px 16px;
    gap: 12px;
  }

  .liquid-hero {
    padding: 120px 0 60px;
    min-height: auto;
  }
  .hero-grid {
    display: flex;
    flex-direction: column;
    gap: 36px;
    text-align: center;
    align-items: center;
  }
  .liquid-avatar-container {
    order: -1;
    margin-bottom: 8px;
  }
  .hero-content {
    order: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
  }
  .hero-content > div {
    justify-content: center;
  }
  .hero-title {
    font-size: clamp(2.1rem, 6vw, 3.2rem);
  }
  .hero-lead {
    font-size: 1.05rem;
    margin-bottom: 24px;
    text-align: center;
  }
  .hero-chips-row {
    justify-content: center;
  }
  .liquid-avatar-glass-frame {
    width: 250px;
    height: 250px;
  }

  .quantum-section {
    padding: 60px 0;
    scroll-margin-top: 70px;
  }
  .quantum-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  #bloch-canvas-v4 {
    height: 270px;
  }
  
  .software-grid, .robotics-grid, .skills-grid, .essays-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .cert-card {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 20px;
  }
  .cert-img-liquid {
    height: 180px;
    margin: 0 auto;
  }
  
  .contact-card {
    padding: 30px 20px;
  }
  .social-pills-row {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.95rem;
  }
  .liquid-card {
    padding: 24px 18px;
  }
  .liquid-avatar-glass-frame {
    width: 210px;
    height: 210px;
  }
  .btn-liquid {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
    font-size: 0.9rem;
  }
  .apple-hud-nav {
    padding: 6px 12px;
  }
  .apple-brand span {
    font-size: 0.95rem;
  }
  .apple-avatar {
    width: 30px;
    height: 30px;
  }
}