/* ==========================================================================
   Avraham Plishtiev - Game Developer Portfolio Core Design System
   ========================================================================== */

/* 1. Global Reset & Custom Properties */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg-primary: #06040d;
  --bg-secondary: #0c091f;
  --bg-tertiary: #13102c;
  --bg-glass: rgba(12, 9, 31, 0.65);
  --bg-modal: rgba(6, 4, 13, 0.9);
  
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(99, 102, 241, 0.35);
  
  --accent-cyan: #06b6d4;
  --accent-indigo: #6366f1;
  --accent-purple: #a855f7;
  
  /* Gradients */
  --accent-gradient: linear-gradient(135deg, #06b6d4, #6366f1, #a855f7);
  --accent-gradient-hover: linear-gradient(135deg, #a855f7, #6366f1, #06b6d4);
  --accent-gradient-text: linear-gradient(135deg, #22d3ee, #818cf8, #c084fc);
  --glass-gradient: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
  
  /* Text */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dark: #0f172a;
  
  /* Typography */
  --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Shadows & Glows */
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
  --shadow-glow-cyan: 0 0 25px rgba(6, 182, 212, 0.25);
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-slow: 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
  
  /* Borders */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-indigo) var(--bg-primary);
}

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

body {
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border: 2px solid var(--bg-primary);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-indigo);
}

/* Selection */
::selection {
  background: rgba(99, 102, 241, 0.3);
  color: var(--text-main);
}

/* ==========================================================================
   2. Background Particle Canvas
   ========================================================================== */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: auto; /* Allow mouse interaction */
  background: radial-gradient(circle at 50% 50%, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.ambient-glow {
  position: fixed;
  top: -10%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
  z-index: -1;
  pointer-events: none;
  animation: float 20s ease-in-out infinite alternate;
}

.ambient-glow-2 {
  position: fixed;
  bottom: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.06) 0%, rgba(0, 0, 0, 0) 70%);
  z-index: -1;
  pointer-events: none;
  animation: float 15s ease-in-out infinite alternate-reverse;
}

@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  100% { transform: translateY(40px) rotate(10deg); }
}

/* ==========================================================================
   3. Page Transitions & Reveal Classes
   ========================================================================== */
.transition-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  z-index: 9999;
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.6s cubic-bezier(0.76, 0, 0.24, 1);
  pointer-events: none;
}

.transition-overlay.active {
  transform: scaleY(1);
  transform-origin: top;
  pointer-events: all;
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Sequential delay classes */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ==========================================================================
   4. Header & Navigation (Glassmorphic)
   ========================================================================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.25rem 2rem;
  transition: padding 0.3s ease, background-color 0.3s ease;
}

header.scrolled {
  padding: 0.75rem 2rem;
  background-color: rgba(6, 4, 13, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 1.75rem;
  height: 1.75rem;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: inline-block;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shine 3s infinite;
}

.logo span {
  display: inline-block;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent-cyan);
}

/* Nav Links */
nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
  padding: 0.5rem 0;
  display: inline-block;
}

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

nav a:hover, nav a.active {
  color: var(--text-main);
  text-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}

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

/* Hamburger Mobile Menu */
.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--text-main);
  margin: 6px 0;
  transition: var(--transition-normal);
}

/* Mobile Nav Open State */
.hamburger.open span:nth-child(1) { transform: rotate(-45deg) translate(-5px, 6px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(45deg) translate(-5px, -6px); }

/* ==========================================================================
   5. Buttons & Typography
   ========================================================================== */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.btn-container {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.85rem 1.85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--text-main);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background: var(--accent-gradient-hover);
  transform: translateY(-3px);
  box-shadow: 0 0 35px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-cyan);
}

.btn-icon {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

/* ==========================================================================
   6. Hero & Main Layout Containers
   ========================================================================== */
main {
  padding-top: 8rem;
  min-height: calc(100vh - 5rem);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
}

/* Hero Section */
.hero-wrapper {
  min-height: 75vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero-tag {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-tag::before {
  content: '';
  width: 20px;
  height: 2px;
  background-color: var(--accent-cyan);
}

.hero-title {
  font-size: 4rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-main) 60%, rgba(255, 255, 255, 0.4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title strong {
  display: inline-block;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent-indigo);
  font-weight: 800;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 580px;
}

/* 3D Interactive Controller/Hologram mock container */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-hologram {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  position: relative;
  animation: floatVisual 6s ease-in-out infinite;
}

.hologram-ring {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border: 1px solid rgba(6, 182, 212, 0.15);
  border-radius: 50%;
  animation: spinRing 12s linear infinite;
}

.hologram-ring:nth-child(2) {
  top: 15px; left: 15px; right: 15px; bottom: 15px;
  border: 1px dashed rgba(168, 85, 247, 0.2);
  animation: spinRing 8s linear infinite reverse;
}

.hologram-core {
  position: absolute;
  top: 30%; left: 30%; right: 30%; bottom: 30%;
  background: var(--accent-gradient);
  border-radius: 50%;
  filter: blur(12px);
  opacity: 0.6;
}

@keyframes floatVisual {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-15px) rotate(2deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes spinRing {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ==========================================================================
   7. Glassmorphic Containers (Glass Card)
   ========================================================================== */
.glass-panel {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 2.5rem;
  box-shadow: var(--shadow-glass);
  position: relative;
  overflow: hidden;
}

.glass-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--glass-gradient);
  pointer-events: none;
  z-index: 1;
}

/* Section Titles */
.section-header {
  margin-bottom: 4rem;
  text-align: center;
  position: relative;
}

.section-title {
  font-size: 2.75rem;
  margin-bottom: 0.75rem;
}

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

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   8. About & Skills Detail (Page-specific features)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.profile-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-glass);
}

.profile-img-wrap {
  width: 100%;
  aspect-ratio: 1 / 1.1;
  background-color: var(--bg-secondary);
  overflow: hidden;
  position: relative;
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.profile-glow {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(to top, rgba(6, 4, 13, 0.8) 0%, rgba(6, 4, 13, 0) 40%);
  z-index: 2;
  pointer-events: none;
}

.profile-overlay-info {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem;
  z-index: 3;
}

.profile-tag {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.profile-name {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Skills Layout */
.skills-container {
  margin-top: 3.5rem;
}

.skills-title {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 0.5rem;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.skill-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-glass-hover);
  transform: translateY(-2px);
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.skill-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
}

.skill-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Education timeline */
.timeline {
  position: relative;
  margin-top: 2rem;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 2px;
  height: calc(100% - 16px);
  background: var(--accent-gradient);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-node {
  position: absolute;
  left: -2.4rem;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.timeline-year {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.timeline-org {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   9. Showcase Project Grid & Filter Layout
   ========================================================================== */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.6rem 1.35rem;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.2);
}

.filter-btn.active {
  background: var(--accent-gradient);
  color: var(--text-main);
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 2.5rem;
}

.project-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-glass);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
  transform-style: preserve-3d;
  perspective: 1000px;
}

.project-card:hover {
  border-color: var(--border-glass-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(99, 102, 241, 0.1);
}

.project-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--bg-secondary);
  overflow: hidden;
  position: relative;
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.project-card:hover .project-thumb img {
  transform: scale(1.05);
}

.project-media-badge {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(6, 4, 13, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.35rem 0.75rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-main);
  z-index: 2;
}

.project-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.project-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.08);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.project-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  transition: color var(--transition-fast);
}

.project-card:hover .project-title {
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent-indigo);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 1rem;
}

.project-link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition-fast);
}

.project-link:hover {
  color: var(--accent-indigo);
  text-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}

/* ==========================================================================
   10. Interactive Slideshow (Carousel inside cards/modals)
   ========================================================================== */
.slideshow-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 1;
}

.slide.active {
  opacity: 1;
  z-index: 2;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slide-controls {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 10px;
  z-index: 10;
  pointer-events: none;
}

.slide-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(6, 4, 13, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  pointer-events: auto;
  transition: var(--transition-fast);
}

.slide-btn:hover {
  background: var(--accent-gradient);
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

.slide-indicators {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 10;
}

.slide-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition-fast);
}

.slide-dot.active {
  background: var(--accent-cyan);
  width: 12px;
  border-radius: 3px;
  box-shadow: 0 0 6px var(--accent-cyan);
}

/* ==========================================================================
   11. Frosted Glass Modals
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: var(--bg-modal);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 2000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  padding: 1.5rem;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glass);
  width: 100%;
  max-width: 800px;
  position: relative;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
}

.modal-overlay.active .modal-box {
  transform: scale(1);
}

.modal-header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: var(--text-main);
  transform: rotate(90deg);
}

.modal-body {
  position: relative;
  width: 100%;
}

.modal-media-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #000;
}

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

.modal-info {
  padding: 2rem;
  border-top: 1px solid var(--border-glass);
}

.modal-info-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.modal-info-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ==========================================================================
   12. Footer Section
   ========================================================================== */
footer {
  border-top: 1px solid var(--border-glass);
  padding: 3rem 0;
  margin-top: 6rem;
  position: relative;
  z-index: 10;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

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

.footer-logo {
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: none;
  color: var(--text-main);
  font-size: 1rem;
}

.footer-logo span {
  color: var(--accent-cyan);
}

/* ==========================================================================
   13. Responsive Styles & Media Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title { font-size: 3.25rem; }
  .hero-grid { gap: 2.5rem; }
}

@media (max-width: 768px) {
  /* Navigation */
  header { padding: 1rem 1.5rem; }
  header.scrolled { padding: 0.6rem 1.5rem; }
  
  .hamburger { display: block; }
  
  nav {
    position: fixed;
    top: 0; right: 0;
    width: 280px; height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-glass);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 3rem;
    gap: 2.5rem;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    z-index: 1000;
  }
  
  nav.open {
    transform: translateX(0);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  }
  
  /* Hero */
  main { padding-top: 6.5rem; }
  section { padding: 4rem 0; }
  
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  
  .hero-title { font-size: 2.75rem; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .btn-container { justify-content: center; }
  
  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .profile-card {
    max-width: 320px;
    margin: 0 auto;
  }
  
  /* Footer */
  .footer-container {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.25rem; }
  .section-title { font-size: 2rem; }
  .glass-panel { padding: 1.5rem; }
  .project-grid { grid-template-columns: 1fr; }
}