/* ====== Modern Theme ====== */
:root {
  /* Dark Theme Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-tertiary: #1a1a24;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-glass: rgba(255, 255, 255, 0.05);
  --bg-glass-hover: rgba(255, 255, 255, 0.08);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b4bcd0;
  --text-muted: #8b94a7;
  --text-accent: #7c3aed;
  
  /* Accent Colors */
  --accent-primary: #7c3aed;
  --accent-secondary: #22d3ee;
  --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #22d3ee 100%);
  --accent-gradient-hover: linear-gradient(135deg, #8b4cf0 0%, #38e4f0 100%);
  
  /* Border & Shadow */
  --border-primary: rgba(255, 255, 255, 0.1);
  --border-secondary: rgba(255, 255, 255, 0.05);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(124, 58, 237, 0.3);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Typography */
  --font-family-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

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

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

body {
  font-family: var(--font-family-primary);
  background: 
    radial-gradient(1200px 600px at 20% -10%, rgba(124, 58, 237, 0.15), transparent),
    radial-gradient(900px 500px at 100% 10%, rgba(34, 211, 238, 0.12), transparent),
    var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ====== Loading Screen ====== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: var(--text-primary);
}

.loading-logo {
  margin-bottom: var(--space-xl);
}

.logo-text {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loading-bar {
  width: 200px;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: 0 auto var(--space-lg);
}

.loading-progress {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  animation: loading 2s ease-in-out infinite;
}

@keyframes loading {
  0% { width: 0%; }
  50% { width: 70%; }
  100% { width: 100%; }
}

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

/* ====== Layout ====== */
.container {
  width: min(1200px, 92%);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section.alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
}

.section-head {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-sm) var(--space-lg);
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  backdrop-filter: blur(10px);
}

.badge-icon {
  font-size: 1rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--space-lg);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
  margin: 0;
}

/* ====== Header ====== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  backdrop-filter: saturate(150%) blur(20px);
  background: rgba(10, 10, 15, 0.8);
  border-bottom: 1px solid var(--border-primary);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) 0;
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.brand:hover {
  transform: scale(1.05);
}

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

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: all var(--transition-normal);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.nav-toggle:hover {
  background: var(--bg-glass);
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 4px 0;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
}

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

.nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ====== Hero Section ====== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: -1;
}

.floating-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
}

.shape {
  position: absolute;
  border-radius: 50%;
  background: var(--accent-gradient);
  opacity: 0.1;
  animation: float 6s ease-in-out infinite;
}

.shape-1 {
  width: 80px;
  height: 80px;
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 120px;
  height: 120px;
  top: 60%;
  right: 15%;
  animation-delay: 2s;
}

.shape-3 {
  width: 60px;
  height: 60px;
  top: 40%;
  left: 80%;
  animation-delay: 4s;
}

.shape-4 {
  width: 100px;
  height: 100px;
  bottom: 20%;
  left: 20%;
  animation-delay: 1s;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  width: 100%;
}

.hero-text {
  z-index: 2;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-sm) var(--space-lg);
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  backdrop-filter: blur(10px);
  animation: slideInDown 0.8s ease;
}

.pill-icon {
  font-size: 1rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  animation: slideInUp 0.8s ease 0.2s both;
}

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

.typewriter-container {
  margin-bottom: var(--space-lg);
  animation: slideInUp 0.8s ease 0.4s both;
}

.typewriter {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 600;
  color: var(--text-secondary);
  min-height: 2rem;
}

.tw-caret {
  opacity: 1;
  animation: blink 1s infinite;
  margin-left: 4px;
  color: var(--accent-primary);
}

@keyframes blink {
  50% { opacity: 0; }
}

.lead {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 60ch;
  margin-bottom: var(--space-xl);
  animation: slideInUp 0.8s ease 0.6s both;
}

.hero-cta {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-2xl);
  animation: slideInUp 0.8s ease 0.8s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
  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 0.5s;
}

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

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  border: none;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--bg-glass);
  border-color: var(--accent-primary);
}

.btn-icon {
  font-size: 1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  animation: slideInUp 0.8s ease 1s both;
}

.stat-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.stat-icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: slideInRight 0.8s ease 0.4s both;
}

.profile-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
  width: 100%;
}

.profile-image-container {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.profile-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-primary);
  box-shadow: var(--shadow-glow);
  margin-bottom: var(--space-md);
}

.profile-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.current-focus h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.focus-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.focus-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.focus-icon {
  font-size: 1rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.social-link:hover {
  background: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.social-icon {
  font-size: 1.2rem;
}

.social-icon img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.85rem;
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 2px;
  height: 20px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes slideInDown {
  from { opacity: 0; transform: translateY(-30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ====== Projects Section ====== */
.projects-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
}

.projects-filter {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-sm) var(--space-lg);
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.project-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-primary);
}

.project-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.project-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.project-tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: var(--space-md);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
}

.project-link:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.projects-cta {
  text-align: center;
}

/* ====== Experience Section ====== */
.timeline-container {
  max-width: 800px;
  margin: 0 auto;
}

.timeline {
  position: relative;
  padding-left: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-2xl);
  padding-left: var(--space-xl);
}

.timeline-marker {
  position: absolute;
  left: -var(--space-xl);
  top: 0;
}

.marker-dot {
  width: 16px;
  height: 16px;
  background: var(--accent-gradient);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
  box-shadow: var(--shadow-md);
}

.marker-line {
  position: absolute;
  top: 16px;
  left: 7px;
  width: 2px;
  height: calc(100% + var(--space-xl));
  background: var(--border-primary);
}

.timeline-item:last-child .marker-line {
  display: none;
}

.timeline-content {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.timeline-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.company {
  color: var(--accent-primary);
  font-weight: 600;
}

.timeline-meta {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.duration,
.location {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.timeline-description ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-lg) 0;
}

.timeline-description li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-description li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.timeline-tags .tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ====== Leadership Section ====== */
.leadership-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
}

.leadership-container {
  max-width: 800px;
  margin: 0 auto;
}

.leadership-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.leadership-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.leadership-header {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-primary);
}

.leadership-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.leadership-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.leadership-info h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.leadership-meta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.duration,
.location {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.leadership-description ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-lg) 0;
}

.leadership-description li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.leadership-description li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.leadership-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.leadership-tags .tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ====== Skills Section ====== */
.skills-container {
  max-width: 1000px;
  margin: 0 auto;
}

.skill-category {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.skill-category:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.category-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.category-icon {
  font-size: 1.5rem;
}

.category-header h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.skills-grid {
  display: grid;
  gap: var(--space-md);
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.skill-name {
  min-width: 120px;
  font-weight: 500;
  color: var(--text-primary);
}

.skill-bar {
  flex: 1;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  transition: width 1s ease;
  width: 0;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.skill-tag {
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-normal);
}

.skill-tag:hover {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-2px);
}

/* ====== Education Section ====== */
.education-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
}

.education-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-xl);
  max-width: 800px;
  margin: 0 auto;
}

.education-header {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--border-primary);
}

.university-logo {
  flex-shrink: 0;
}

.logo-image {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: var(--radius-lg);
}

.education-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.education-info h4 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.education-meta {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.graduation,
.gpa {
  color: var(--text-muted);
  font-weight: 500;
}

.education-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
}

.education-details h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.concentration-tag {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: var(--accent-primary);
  color: white;
  border-radius: var(--radius-lg);
  font-weight: 500;
}

.minor-tags {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.minor-tag {
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
}

.achievements ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.achievements li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.achievements li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.course-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.course-tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ====== Contact Section ====== */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.contact-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.contact-card h4 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.contact-card p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.contact-link {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: var(--accent-primary);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-lg);
  font-weight: 500;
  transition: all var(--transition-normal);
}

.contact-link:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
}

.contact-form {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(10px);
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ====== Footer ====== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
}

.footer-brand h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

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

.footer-brand p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer-section h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section li {
  margin-bottom: var(--space-sm);
}

.footer-section a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-primary);
}

.footer-bottom p {
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

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

/* ====== Back to Top Button ====== */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 50px;
  height: 50px;
  background: var(--accent-gradient);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  z-index: var(--z-fixed);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ====== Responsive Design ====== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-container {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
    flex-direction: column;
    padding: var(--space-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-links.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-link {
    padding: var(--space-md);
    text-align: center;
    border-radius: var(--radius-md);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline {
    padding-left: var(--space-lg);
  }
  
  .timeline-item {
    padding-left: var(--space-lg);
  }
  
  .timeline-marker {
    left: -var(--space-lg);
  }
  
  .leadership-header {
    flex-direction: column;
    text-align: center;
    gap: var(--space-lg);
  }
  
  .education-header {
    flex-direction: column;
    text-align: center;
    gap: var(--space-lg);
  }
  
  .education-details {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .back-to-top {
    bottom: var(--space-md);
    right: var(--space-md);
    width: 45px;
    height: 45px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .hero {
    padding-top: 100px;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .profile-card {
    padding: var(--space-lg);
  }
  
  .project-card,
  .timeline-content,
  .skill-category,
  .leadership-card,
  .contact-card,
  .contact-form {
    padding: var(--space-lg);
  }
  
  .education-card {
    padding: var(--space-lg);
  }
}