/* ==========================================================================
   Deep Cyber Glassmorphism Portfolio Stylesheet - Yathish Kumar B
   Design Aesthetics: Frosted Glass (blur 24px), Cyan & Violet Mesh Glows, 20px Rounded Radius
   ========================================================================== */

:root {
  --bg-main: #030712;
  --bg-card: rgba(15, 23, 42, 0.65);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-nav: rgba(3, 7, 18, 0.85);

  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.35);
  --accent-indigo: #6366f1;
  --accent-violet: #a855f7;
  --accent-emerald: #10b981;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --border-glass: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(6, 182, 212, 0.5);

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --font-code: 'Fira Code', monospace;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);

  --radius-sm: 10px;
  --radius-md: 20px;
  --radius-lg: 32px;

  --shadow-glass: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(6, 182, 212, 0.15);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Top Scroll Progress Bar */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo), var(--accent-violet));
  z-index: 1001;
  transition: width 0.1s ease-out;
}

/* Text Gradients & Glass Helpers */
.text-gradient {
  background: linear-gradient(135deg, #38bdf8 0%, #a855f7 50%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-glass);
}

.glow-border {
  position: relative;
}

.glow-border::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet), transparent 70%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition-normal);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 76px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
}

.brand-logo {
  font-family: var(--font-code);
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(6, 182, 212, 0.35);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-cyan);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-btn {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  color: #fff !important;
  padding: 0.55rem 1.4rem;
  border-radius: 50px;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
}

.nav-btn::after {
  display: none;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.mobile-toggle .bar {
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  transition: var(--transition-fast);
}

/* Hero Section with Ambient Ambient Mesh Lighting */
.hero-section {
  position: relative;
  padding-top: 150px;
  padding-bottom: 90px;
  min-height: 85vh;
}

.hero-bg-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 450px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.18) 0%, rgba(168, 85, 247, 0.12) 45%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  animation: glowPulse 6s ease-in-out infinite alternate;
}

@keyframes glowPulse {
  0% { transform: translate(-50%, -50%) scale(0.95); opacity: 0.8; }
  100% { transform: translate(-50%, -50%) scale(1.08); opacity: 1; }
}

.hero-mesh-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
  z-index: 0;
}

.hero-container {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1.1rem;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: 50px;
  color: var(--accent-emerald);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 1rem;
}

.hero-typing-container {
  font-family: var(--font-code);
  font-size: 1.4rem;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  min-height: 2rem;
}

.typing-cursor {
  animation: blink 1s infinite;
}

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

.hero-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 800px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.85rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  color: #fff;
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.12);
  transform: translateY(-2px);
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.hero-socials a {
  color: var(--text-muted);
  padding: 0.6rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  transition: var(--transition-fast);
}

.hero-socials a:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
}

/* Hero Stats Grid */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.stat-card {
  padding: 1.75rem 1.5rem;
  text-align: center;
  border-radius: var(--radius-md);
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 2.35rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.stat-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

/* Section Header */
.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem auto;
}

.section-subtitle {
  text-transform: uppercase;
  font-family: var(--font-code);
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.35rem;
  font-weight: 700;
  color: var(--text-main);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.about-card {
  padding: 2.25rem 2rem;
}

.about-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(6, 182, 212, 0.3);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
}

.about-card h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.about-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Cyber Technical Skills Section */
.skills-view-controls {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.75rem;
  flex-wrap: wrap;
}

.skill-category-btn {
  padding: 0.65rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  transition: var(--transition-normal);
}

.skill-category-btn:hover, .skill-category-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.3);
}

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

.skill-cyber-card {
  padding: 1.75rem;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.skill-cyber-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glass);
}

.skill-cyber-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-violet));
  border-radius: 4px 0 0 4px;
}

.cyber-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.cyber-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.cyber-card-badge {
  font-family: var(--font-code);
  font-size: 0.725rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.cyber-card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.cyber-card-meter {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.cyber-card-bar {
  flex-grow: 1;
  height: 7px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  overflow: hidden;
}

.cyber-card-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo), var(--accent-violet));
  border-radius: 10px;
  transition: width 1s ease-out;
}

.cyber-card-value {
  font-family: var(--font-code);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

/* Projects Section */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.75rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.55rem 1.35rem;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  transition: var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  color: #fff;
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.85rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem;
  height: 100%;
  border-radius: var(--radius-md);
}

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

.project-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.25rem 0.65rem;
  border-radius: 50px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo);
  border: 1px solid rgba(99, 102, 241, 0.35);
}

.project-card.featured .project-badge {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.35);
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  font-family: var(--font-code);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: 6px;
  color: var(--text-muted);
}

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

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.link-btn:hover {
  text-decoration: underline;
}

/* IEEE Research Section */
.research-banner {
  padding: 3.25rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(30, 41, 59, 0.85));
}

.research-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.95rem;
  border-radius: 50px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(6, 182, 212, 0.35);
}

.research-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.research-meta {
  color: var(--accent-indigo);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
}

.research-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 850px;
  margin-bottom: 2rem;
}

.research-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.highlight-item {
  padding: 1.1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-main);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.highlight-bullet {
  color: var(--accent-cyan);
  font-weight: 700;
}

/* Timeline Section */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.timeline-col-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--accent-cyan);
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  padding-left: 1.5rem;
  border-left: 2px solid var(--border-glass);
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -1.95rem;
  top: 0.25rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-main);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.timeline-card {
  padding: 1.75rem;
  border-radius: var(--radius-md);
}

.timeline-period {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline-org {
  color: var(--accent-indigo);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

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

.timeline-bullets {
  margin-top: 0.75rem;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.timeline-bullets li {
  margin-bottom: 0.35rem;
}

.score-badge {
  display: inline-block;
  font-weight: 700;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.15);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* Certifications & Info Section */
.info-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
}

.info-card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

.cert-card, .lang-card {
  padding: 2.25rem;
  border-radius: var(--radius-md);
}

.cert-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cert-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
}

.cert-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

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

.cert-year {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--accent-cyan);
}

.location-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1.25rem;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.lang-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.lang-item {
  padding: 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
}

.lang-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.lang-level {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Contact Section Full Layout */
.contact-card-full {
  padding: 3.5rem;
  max-width: 950px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
}

.contact-info-full h3 {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.contact-info-full p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 2.75rem;
}

.contact-details-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.contact-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.contact-value-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.contact-val {
  font-weight: 600;
  color: var(--text-main);
  word-break: break-word;
}

.contact-val:hover {
  color: var(--accent-cyan);
}

.copy-btn {
  font-size: 0.75rem;
  padding: 0.25rem 0.7rem;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  border: 1px solid var(--border-glass);
  transition: var(--transition-fast);
}

.copy-btn:hover {
  background: var(--accent-cyan);
  color: #fff;
}

/* Modal Backdrops */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.88);
  backdrop-filter: blur(16px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

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

.modal-card {
  max-width: 680px;
  width: 100%;
  padding: 2.75rem;
  position: relative;
  max-height: 85vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
  border-radius: var(--radius-lg);
}

.modal-backdrop.active .modal-card {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  font-size: 1.75rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-header {
  margin-bottom: 1.5rem;
}

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 0.4rem;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.7rem;
  border-radius: 50px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.modal-body ul {
  padding-left: 1.25rem;
  margin: 1rem 0;
  color: var(--text-muted);
}

.modal-body li {
  margin-bottom: 0.5rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-glass);
  padding: 2.25rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

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

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid, .timeline-grid, .info-grid, .contact-details-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    background: var(--bg-main);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-glass);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
  }
  .nav-menu.active {
    transform: translateY(0);
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .research-title {
    font-size: 1.75rem;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
}