/* ============================================================
   JANITH WANASINGHE - PORTFOLIO STYLESHEET
   Dark cyber-engineering theme with heavy animations
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg-primary: #050510;
  --bg-secondary: #0a0a1a;
  --bg-card: rgba(12, 15, 30, 0.85);
  --bg-card-hover: rgba(18, 24, 50, 0.95);
  --accent: #00d4ff;
  --accent-rgb: 0, 212, 255;
  --accent2: #7c3aed;
  --accent2-rgb: 124, 58, 237;
  --accent3: #22d3ee;
  --accent4: #a855f7;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(0, 212, 255, 0.1);
  --border-hover: rgba(0, 212, 255, 0.35);
  --gradient-main: linear-gradient(135deg, var(--accent), var(--accent2));
  --gradient-warm: linear-gradient(135deg, #f472b6, var(--accent2));
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --nav-height: 70px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-elastic: 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: default;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

a:hover {
  color: var(--accent3);
  text-shadow: 0 0 8px rgba(var(--accent-rgb), 0.4);
}

img {
  max-width: 100%;
  height: auto;
}

::selection {
  background: rgba(var(--accent-rgb), 0.3);
  color: #fff;
}

/* ---------- Custom Cursor Glow ---------- */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  opacity: 0;
}

body:hover .cursor-glow {
  opacity: 1;
}

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

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(5, 5, 16, 0.75);
  backdrop-filter: blur(24px) saturate(1.8);
  -webkit-backdrop-filter: blur(24px) saturate(1.8);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(5, 5, 16, 0.95);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.6);
  border-bottom-color: var(--border-hover);
}

.navbar.hide-nav {
  transform: translateY(-100%);
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  transition: transform var(--transition-spring);
}

.nav-logo:hover {
  transform: scale(1.08);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient-main);
  border-radius: 2px;
  transition: transform var(--transition-smooth);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-smooth);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  padding: 2rem;
  overflow: hidden;
}

/* Hero Slideshow Background */
.hero-slideshow {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  animation: kenBurns 12s ease-in-out infinite alternate;
}

.hero-slide:nth-child(2) img { animation-delay: -3s; }
.hero-slide:nth-child(3) img { animation-delay: -6s; }
.hero-slide:nth-child(4) img { animation-delay: -9s; }

.hero-slideshow-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(5, 5, 16, 0.92) 0%,
    rgba(5, 5, 16, 0.80) 40%,
    rgba(5, 5, 16, 0.85) 100%
  );
  z-index: 1;
}

/* Floating orbs */
.hero::before {
  content: '';
  position: absolute;
  top: 15%;
  left: 8%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.06) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatOrb 10s ease-in-out infinite;
  pointer-events: none;
  z-index: 2;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 10%;
  right: 8%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(var(--accent2-rgb), 0.05) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatOrb 12s ease-in-out infinite reverse;
  pointer-events: none;
  z-index: 2;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  position: relative;
  z-index: 3;
}

.hero-profile-img {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(var(--accent-rgb), 0.4);
  box-shadow: 0 0 40px rgba(var(--accent-rgb), 0.2), 0 0 80px rgba(var(--accent-rgb), 0.05);
  margin-bottom: 1.5rem;
  animation: heroFadeIn 1s ease-out 0.2s both;
  transition: all var(--transition-smooth);
}

.hero-profile-img:hover {
  transform: scale(1.08) rotate(2deg);
  box-shadow: 0 0 60px rgba(var(--accent-rgb), 0.4);
  border-color: var(--accent);
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  animation: heroFadeIn 1s ease-out 0.4s both;
  letter-spacing: 2px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1rem;
  animation: heroFadeIn 1s ease-out 0.6s both;
  letter-spacing: -1px;
}

.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Glitch hover on hero name */
.hero-name {
  position: relative;
  display: inline-block;
  cursor: pointer;
}

.hero-name:hover {
  animation: glitchText 0.3s ease-in-out;
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 1.5rem;
  animation: heroFadeIn 1s ease-out 0.8s both;
  line-height: 1.6;
}

.typing-wrapper {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 2rem;
  min-height: 1.8em;
  animation: heroFadeIn 1s ease-out 1s both;
}

.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  animation: heroFadeIn 1s ease-out 1.2s both;
}

/* Magnetic buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  border-radius: 14px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-spring);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 40px rgba(var(--accent-rgb), 0.45);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid rgba(var(--accent-rgb), 0.4);
}

.btn-outline:hover {
  background: rgba(var(--accent-rgb), 0.1);
  border-color: var(--accent);
  transform: translateY(-3px) scale(1.03);
  color: var(--accent);
}

.hero-social {
  display: flex;
  gap: 1rem;
  justify-content: center;
  animation: heroFadeIn 1s ease-out 1.4s both;
}

.hero-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition-spring);
}

.hero-social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 8px 25px rgba(var(--accent-rgb), 0.2);
}

/* Slideshow dots */
.slideshow-dots {
  position: absolute;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.6rem;
  z-index: 4;
}

.slideshow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(var(--accent-rgb), 0.3);
  border: none;
  cursor: pointer;
  transition: all var(--transition-smooth);
  padding: 0;
}

.slideshow-dot.active {
  background: var(--accent);
  box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.5);
  transform: scale(1.3);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite, heroFadeIn 1s ease-out 1.6s both;
  z-index: 4;
}

.scroll-indicator span {
  display: block;
  width: 24px;
  height: 24px;
  border-right: 2px solid rgba(var(--accent-rgb), 0.5);
  border-bottom: 2px solid rgba(var(--accent-rgb), 0.5);
  transform: rotate(45deg);
}

/* ---------- Section Styles ---------- */
.section {
  position: relative;
  z-index: 1;
  padding: 6rem 2rem;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

/* Animated text reveal */
.section-title .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(40px) rotate(5deg);
  transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.section-title.text-revealed .char {
  opacity: 1;
  transform: translateY(0) rotate(0);
}

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

/* ---------- Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Directional reveals */
.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-left.visible,
.reveal-right.visible,
.reveal-scale.visible {
  opacity: 1;
  transform: translate(0) scale(1);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ---------- Cards with 3D Tilt ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 2rem;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  perspective: 1000px;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform var(--transition-smooth);
  transform-origin: left;
}

/* Card shine effect */
.card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(var(--accent-rgb), 0.06) 0%,
    transparent 50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

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

.card:hover::before {
  transform: scaleX(1);
}

.card:hover::after {
  opacity: 1;
}

/* ---------- About Section ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-img {
  width: 300px;
  height: 300px;
  border-radius: 20px;
  object-fit: cover;
  border: 2px solid rgba(var(--accent-rgb), 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-spring);
}

.about-img:hover {
  transform: scale(1.04) rotate(-1deg);
  border-color: var(--accent);
  box-shadow: 0 25px 70px rgba(var(--accent-rgb), 0.15);
}

.about-decorative {
  position: absolute;
  top: -15px;
  left: calc(50% - 165px);
  width: 330px;
  height: 330px;
  border: 2px dashed rgba(var(--accent-rgb), 0.15);
  border-radius: 20px;
  transform: rotate(6deg);
  pointer-events: none;
  animation: decorativeSpin 30s linear infinite;
}

.about-text h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1rem;
}

/* Animated stat counters */
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.2rem;
  border-radius: 14px;
  background: rgba(var(--accent-rgb), 0.04);
  border: 1px solid var(--border);
  transition: all var(--transition-spring);
}

.stat-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 8px 25px rgba(var(--accent-rgb), 0.1);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  display: block;
}

/* Interests tags */
.interests-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.interest-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  background: rgba(var(--accent-rgb), 0.05);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: all var(--transition-spring);
  cursor: default;
}

.interest-tag:hover {
  border-color: var(--border-hover);
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.12);
  transform: translateY(-3px) scale(1.05);
}

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

.timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 75px;
  padding-bottom: 2.5rem;
}

.timeline-dot {
  position: absolute;
  left: 22px;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent);
  box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.4);
  z-index: 1;
  transition: all var(--transition-spring);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 25px rgba(var(--accent-rgb), 0.7);
  transform: scale(1.4);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  transition: all var(--transition-smooth);
}

.timeline-item:hover .timeline-content {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateX(6px);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.timeline-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

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

.gpa-badge {
  display: inline-block;
  background: rgba(var(--accent-rgb), 0.12);
  color: var(--accent);
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.85rem;
  border: 1px solid rgba(var(--accent-rgb), 0.25);
}

/* ---------- Research Section ---------- */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.research-card .card-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(var(--accent-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
  transition: transform var(--transition-spring);
}

.research-card:hover .card-icon {
  transform: scale(1.15) rotate(-5deg);
}

.research-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.research-card .research-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.research-card ul {
  list-style: none;
  padding: 0;
}

.research-card ul li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
}

.research-card ul li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.85rem;
}

/* ---------- Projects Section ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  display: flex;
  flex-direction: column;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.project-icon {
  font-size: 2rem;
  transition: transform var(--transition-spring);
}

.project-card:hover .project-icon {
  transform: scale(1.2) rotate(-10deg);
}

.project-links {
  display: flex;
  gap: 0.75rem;
}

.project-links a {
  color: var(--text-muted);
  transition: all var(--transition-spring);
}

.project-links a:hover {
  color: var(--accent);
  transform: translateY(-3px) scale(1.15);
}

.project-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.project-card .project-year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.project-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  flex-grow: 1;
  margin-bottom: 1rem;
}

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

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  border: 1px solid rgba(var(--accent-rgb), 0.15);
  transition: all var(--transition-spring);
}

.tag:hover {
  background: rgba(var(--accent-rgb), 0.18);
  border-color: rgba(var(--accent-rgb), 0.4);
  transform: translateY(-2px);
}

/* ---------- Awards Section ---------- */
.awards-list {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.award-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
}

.award-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  margin-top: 0.25rem;
  transition: transform var(--transition-spring);
}

.award-item:hover .award-icon {
  transform: scale(1.3) rotate(-10deg);
}

.award-content h3 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.award-content p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.award-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
}

/* ---------- Experience Section ---------- */
.experience-list {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.exp-card {
  padding: 1.5rem 2rem;
}

.exp-card .exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.exp-card h3 { font-size: 1.05rem; }

.exp-card .exp-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  white-space: nowrap;
}

.exp-card .exp-org {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.exp-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---------- Skills Section with Marquee ---------- */
.skills-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-category {
  padding: 1.5rem;
}

.skill-category h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-size: 0.82rem;
  padding: 0.35rem 0.85rem;
  border-radius: 8px;
  background: rgba(var(--accent-rgb), 0.06);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition-spring);
  cursor: default;
}

.skill-tag:hover {
  background: rgba(var(--accent-rgb), 0.15);
  border-color: var(--border-hover);
  color: var(--accent);
  transform: translateY(-3px) scale(1.08);
  box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.12);
}

/* Skills Marquee */
.skills-marquee-wrapper {
  overflow: hidden;
  margin-top: 2.5rem;
  padding: 1rem 0;
  position: relative;
}

.skills-marquee-wrapper::before,
.skills-marquee-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 100px;
  z-index: 2;
  pointer-events: none;
}

.skills-marquee-wrapper::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-primary), transparent);
}

.skills-marquee-wrapper::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-primary), transparent);
}

.skills-marquee {
  display: flex;
  gap: 2rem;
  animation: marqueeScroll 30s linear infinite;
  width: max-content;
}

.skills-marquee .marquee-item {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  white-space: nowrap;
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(var(--accent-rgb), 0.03);
  transition: all var(--transition-fast);
}

.skills-marquee .marquee-item:hover {
  color: var(--accent);
  border-color: var(--border-hover);
  background: rgba(var(--accent-rgb), 0.08);
}

/* ---------- Event Groups (Gallery Sections) ---------- */
.gallery-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2.5rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.events-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* Single event group card */
.event-group {
  padding: 0;
  overflow: hidden;
  border-radius: 20px;
}

.event-group-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 320px;
}

/* Hero image of the event group */
.event-hero-img {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  min-height: 320px;
}

.event-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1), filter 0.5s ease;
}

.event-group:hover .event-hero-img img {
  transform: scale(1.06);
}

/* Face-centered for portrait-heavy photos */
.event-hero-img.face-top img {
  object-position: center 15%;
}

.event-hero-img.face-center img {
  object-position: center center;
}

/* Pop overlay on hover */
.event-hero-img .img-pop-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5, 5, 16, 0.7) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.event-hero-img:hover .img-pop-overlay {
  opacity: 1;
}

.img-pop-overlay .expand-hint {
  color: #fff;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  background: rgba(var(--accent-rgb), 0.15);
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  border: 1px solid rgba(var(--accent-rgb), 0.2);
}

/* Event info panel */
.event-info-panel {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.event-info-panel h3 {
  font-size: 1.25rem;
  margin-bottom: 0.35rem;
}

.event-info-panel .event-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.event-info-panel .event-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.lang-badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 6px;
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid rgba(var(--accent-rgb), 0.2);
  font-size: 0.72rem;
  margin-left: 0.5rem;
  vertical-align: middle;
}

/* Thumbnail strip for multi-photo events */
.event-thumbnails {
  display: flex;
  gap: 0.5rem;
  margin-top: auto;
  flex-wrap: wrap;
}

.event-thumb {
  width: 64px;
  height: 48px;
  border-radius: 8px;
  object-fit: cover;
  object-position: center 25%;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--transition-spring);
  opacity: 0.6;
}

.event-thumb:hover,
.event-thumb.active {
  border-color: var(--accent);
  opacity: 1;
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.2);
}

/* Single photo event (compact) */
.event-single {
  padding: 0;
  overflow: hidden;
}

.event-single .event-group-inner {
  min-height: 260px;
}

/* ---------- Representations Slideshow ---------- */
.rep-slideshow-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  overflow: hidden;
}

.rep-slideshow {
  position: relative;
  min-height: 420px;
}

.rep-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.rep-slide.active {
  position: relative;
  opacity: 1;
  visibility: visible;
}

.rep-slide-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 380px;
  background: var(--bg-card);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: border-color var(--transition-smooth);
}

.rep-slide-inner:hover {
  border-color: var(--border-hover);
}

.rep-slide-img {
  position: relative;
  overflow: hidden;
  min-height: 380px;
}

.rep-slide-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.rep-slide.active .rep-slide-img img {
  animation: repSlideIn 0.8s ease forwards;
}

@keyframes repSlideIn {
  0% { transform: scale(1.1); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}

.rep-slide-info {
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.rep-slide-info h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rep-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.rep-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Representations nav arrows */
.rep-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
  color: var(--accent);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(8px);
}

.rep-nav:hover {
  background: rgba(var(--accent-rgb), 0.25);
  border-color: var(--accent);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 0 20px rgba(var(--accent-rgb), 0.3);
}

.rep-prev { left: -60px; }
.rep-next { right: -60px; }

/* Representations dots */
.rep-dots {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.rep-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(var(--accent-rgb), 0.2);
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  cursor: pointer;
  transition: all var(--transition-smooth);
}

.rep-dot.active {
  background: var(--accent);
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.5);
  transform: scale(1.2);
}

.rep-dot:hover:not(.active) {
  background: rgba(var(--accent-rgb), 0.4);
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
  cursor: pointer;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 90%;
  max-height: 85vh;
  border-radius: 14px;
  box-shadow: 0 20px 80px rgba(0,0,0,0.6);
  cursor: default;
  animation: lightboxZoomIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transition: all var(--transition-spring);
  border: 1px solid rgba(255,255,255,0.1);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
  transform: rotate(90deg) scale(1.1);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition-spring);
  backdrop-filter: blur(4px);
}

.lightbox-nav:hover {
  background: rgba(var(--accent-rgb), 0.2);
  border-color: rgba(var(--accent-rgb), 0.3);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-prev { left: 2rem; }
.lightbox-next { right: 2rem; }

.lightbox-counter {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: rgba(0,0,0,0.5);
  padding: 0.4rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
}

/* ---------- Math / YouTube Section ---------- */
.math-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2.5rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 2rem;
}

.video-card { border-radius: 18px; overflow: hidden; }

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-card .video-info {
  padding: 1rem 1.25rem 1.25rem;
}

.video-card h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.video-card p { font-size: 0.88rem; color: var(--text-muted); }

/* ---------- Profiles Section ---------- */
.profiles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
}

.profile-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text-primary);
}

.profile-card:hover {
  color: var(--text-primary);
}

.profile-card .profile-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
  transition: all var(--transition-spring);
}

.profile-card:hover .profile-icon {
  transform: scale(1.15) rotate(-5deg);
}

.profile-card .profile-icon.github { background: rgba(255,255,255,0.1); }
.profile-card .profile-icon.linkedin { background: rgba(10,102,194,0.15); color: #0a66c2; }
.profile-card .profile-icon.mastodon { background: rgba(99,100,255,0.15); color: #6364ff; }
.profile-card .profile-icon.facebook { background: rgba(24,119,242,0.15); color: #1877f2; }
.profile-card .profile-icon.instagram { background: rgba(225,48,108,0.15); color: #e1306c; }
.profile-card .profile-icon.tryhackme { background: rgba(26,26,26,0.3); color: #88cc14; }
.profile-card .profile-icon.bootdev { background: rgba(168,85,247,0.15); color: #a855f7; }
.profile-card .profile-icon.university { background: rgba(var(--accent-rgb),0.1); color: var(--accent); }
.profile-card .profile-icon.youtube { background: rgba(255,0,0,0.12); color: #ff0000; }

.profile-details h3 { font-size: 0.95rem; font-weight: 600; }
.profile-details p { font-size: 0.8rem; color: var(--text-muted); }

/* -- Platform Badges -- */
.platform-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.badge-item {
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 12px;
  overflow: hidden;
}
.badge-item iframe {
  display: block;
  border-radius: 12px;
}
.bootdev-badge {
  max-width: 400px;
  width: 100%;
  height: auto;
  border-radius: 12px;
}
@media (max-width: 500px) {
  .badge-item iframe { width: 320px; }
  .bootdev-badge { max-width: 320px; }
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(var(--accent-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
  color: var(--accent);
  transition: all var(--transition-spring);
}

.contact-card:hover .contact-icon {
  transform: scale(1.15) rotate(-5deg);
}

.contact-details h3 { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.15rem; }
.contact-details p,
.contact-details a { font-size: 0.88rem; color: var(--text-secondary); }

/* ---------- Footer ---------- */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  background: rgba(5, 5, 16, 0.9);
}

.footer p { color: var(--text-muted); font-size: 0.88rem; }

.footer .footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.footer .footer-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer .footer-links a:hover { color: var(--accent); }

/* ---------- Scroll to Top ---------- */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: var(--gradient-main);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: all var(--transition-spring);
  box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.3);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.scroll-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 12px 40px rgba(var(--accent-rgb), 0.45);
}

/* ---------- Section Divider ---------- */
.section-divider {
  height: 1px;
  max-width: 200px;
  margin: 0 auto;
  background: var(--gradient-main);
  opacity: 0.3;
  border: none;
}

/* ---------- Keyframe Animations ---------- */
@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-12px); }
  60% { transform: translateX(-50%) translateY(-6px); }
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -25px) scale(1.08); }
  50% { transform: translate(-15px, 15px) scale(0.95); }
  75% { transform: translate(20px, 10px) scale(1.03); }
}

@keyframes kenBurns {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.15) translate(-2%, -2%); }
}

@keyframes glitchText {
  0% { transform: translate(0); }
  20% { transform: translate(-3px, 2px); }
  40% { transform: translate(2px, -2px); }
  60% { transform: translate(-2px, -1px); }
  80% { transform: translate(3px, 1px); }
  100% { transform: translate(0); }
}

@keyframes decorativeSpin {
  from { transform: rotate(6deg); }
  to { transform: rotate(366deg); }
}

@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes lightboxZoomIn {
  from { transform: scale(0.85); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.4); }
  50% { box-shadow: 0 0 0 20px rgba(var(--accent-rgb), 0); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ---------- Loading Screen ---------- */
.loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  text-align: center;
}

.loader-logo {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: pulseGlow 2s ease-in-out infinite;
}

.loader-bar {
  width: 120px;
  height: 3px;
  background: rgba(var(--accent-rgb), 0.15);
  border-radius: 4px;
  margin: 1.5rem auto 0;
  overflow: hidden;
}

.loader-bar-inner {
  width: 40%;
  height: 100%;
  background: var(--gradient-main);
  border-radius: 4px;
  animation: loaderSlide 1.2s ease-in-out infinite;
}

@keyframes loaderSlide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .nav-links { gap: 0.1rem; }
  .nav-links a { font-size: 0.78rem; padding: 0.35rem 0.6rem; }
  .event-group-inner { grid-template-columns: 1fr; }
  .event-hero-img { min-height: 250px; max-height: 320px; }
  .rep-prev { left: -10px; }
  .rep-next { right: -10px; }
  .rep-slide-inner { grid-template-columns: 1fr; }
  .rep-slide-img { min-height: 260px; max-height: 340px; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(5, 5, 16, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 0.5rem;
    transition: right var(--transition-smooth);
    border-left: 1px solid var(--border);
    z-index: 1000;
  }

  .nav-links.open { right: 0; }

  .nav-links a {
    font-size: 1rem;
    padding: 0.75rem 1rem;
    width: 100%;
  }

  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-img { width: 200px; height: 200px; }

  .about-decorative {
    left: calc(50% - 115px);
    width: 230px;
    height: 230px;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
  }

  .stat-number { font-size: 1.5rem; }

  .hero h1 { font-size: 2.2rem; }
  .hero-tagline { font-size: 0.95rem; }

  .research-grid,
  .projects-grid { grid-template-columns: 1fr; }

  .event-group-inner { grid-template-columns: 1fr; }
  .event-hero-img { min-height: 220px; max-height: 300px; }

  .rep-prev { left: 5px; }
  .rep-next { right: 5px; }
  .rep-nav { width: 36px; height: 36px; font-size: 0.85rem; }
  .rep-slide-inner { grid-template-columns: 1fr; }
  .rep-slide-img { min-height: 220px; max-height: 300px; }
  .rep-slide-info { padding: 1.5rem; }
  .rep-slideshow { min-height: 500px; }

  .video-grid { grid-template-columns: 1fr; }

  .section { padding: 3.5rem 1.25rem; }

  .timeline::before { left: 15px; }
  .timeline-item { padding-left: 50px; }
  .timeline-dot { left: 8px; width: 16px; height: 16px; }

  .slideshow-dots { bottom: 4rem; }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn { width: 100%; justify-content: center; }
  .profiles-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr; }
  .event-hero-img { min-height: 200px; }
  .event-thumbnails { gap: 0.35rem; }
  .event-thumb { width: 52px; height: 40px; }
  .rep-nav { width: 32px; height: 32px; font-size: 0.75rem; }
  .rep-slide-img { min-height: 200px; }
}

/* Mobile Nav Overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  transition: opacity var(--transition-smooth);
}

.nav-overlay.active { display: block; }