:root {
  /* Color System */
  --color-black: #0A0A0A;
  --color-dark: #121212;
  --color-charcoal: #1A1A1A;
  --color-slate: #252525;
  --color-gray: #404040;

  --color-white: #FFFFFF;
  --color-off-white: #F5F5F5;
  --color-light-gray: #E0E0E0;
  --color-text-muted: #A0A0A0;

  --color-accent: #FF6B35;
  --color-accent-dark: #E5522A;
  --color-accent-light: #FF8555;

  --color-success: #10B981;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-light: rgba(255, 255, 255, 0.12);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Space Mono', 'Courier New', monospace;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Animation */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-slower: 0.8s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-primary);
  background: var(--color-black);
  color: var(--color-off-white);
  line-height: 1.6;
  overflow-x: hidden;
  font-size: 16px;
  /* Safe area insets for notched devices */
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

/* Background Effects */
.background-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.background-gradient {
  position: absolute;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 107, 53, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
  animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {

  0%,
  100% {
    opacity: 0.6;
    transform: scale(1) rotate(0deg);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.1) rotate(5deg);
  }
}

.background-grid {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100px 100px;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black 40%, transparent 100%);
}

.background-noise {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Container */
.container {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  transform: translateY(0);
  transition: transform var(--transition-base);
}

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

.nav-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--color-white);
  font-family: var(--font-mono);
  cursor: pointer;
}

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

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color var(--transition-base);
  position: relative;
  letter-spacing: 0.3px;
  cursor: pointer;
}

.nav-links a:hover {
  color: var(--color-white);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

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

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-base);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 45% 55%;
  gap: var(--spacing-3xl);
  align-items: center;
  padding: calc(80px + var(--spacing-3xl)) var(--spacing-lg) var(--spacing-3xl);
  position: relative;
}

.hero-image-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: fadeInScale 1s ease forwards 0.2s;
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 3/4;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  position: relative;
  z-index: 2;
  mask-image:
    linear-gradient(to bottom, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 70%, rgba(0, 0, 0, 0) 100%),
    linear-gradient(to right, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 1) 5%, rgba(0, 0, 0, 1) 95%, rgba(0, 0, 0, 0) 100%);
  mask-composite: intersect;
  -webkit-mask-image:
    linear-gradient(to bottom, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 70%, rgba(0, 0, 0, 0) 100%),
    linear-gradient(to right, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 1) 5%, rgba(0, 0, 0, 1) 95%, rgba(0, 0, 0, 0) 100%);
  -webkit-mask-composite: source-in;
}

.hero-image-glow {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  background: radial-gradient(ellipse at center, var(--color-accent), transparent 70%);
  opacity: 0.15;
  filter: blur(40px);
  z-index: 1;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {

  0%,
  100% {
    opacity: 0.15;
    transform: scale(1);
  }

  50% {
    opacity: 0.25;
    transform: scale(1.05);
  }
}

.hero-content {
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.4s;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.3);
  border-radius: 50px;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-lg);
  font-family: var(--font-mono);
}

.hero-label .status-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.6;
    transform: scale(0.8);
  }
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
  letter-spacing: -2px;
  color: var(--color-white);
}

.hero h1 .name {
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-light-gray) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.hero .subtitle {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -1px;
}

.hero .description {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 6px;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-family: var(--font-primary);
  letter-spacing: 0.3px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-border-light);
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* Social Links */
.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
  opacity: 0;
  animation: fadeIn 1s ease forwards 0.8s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition-base);
  cursor: pointer;
}

.social-link:hover {
  background: rgba(255, 107, 53, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

/* Section Styles */
.section {
  padding: var(--spacing-3xl) 0;
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slower);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-label {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.3);
  border-radius: 50px;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-md);
  font-family: var(--font-mono);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  letter-spacing: -1px;
  color: var(--color-white);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.stat-card {
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
}

.stat-card:hover::before {
  transform: translateX(100%);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--color-border-light);
  transform: translateY(-4px);
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Experience Timeline */
.timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--color-border-light) 10%, var(--color-border-light) 90%, transparent);
}

.timeline::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 0%;
  background: linear-gradient(180deg, var(--color-accent), var(--color-accent-light));
  transition: height 2s ease;
  opacity: 0.6;
}

.timeline.animating::after {
  height: 100%;
}

.timeline-item {
  position: relative;
  padding-left: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  opacity: 0;
  transform: translateX(-20px);
  transition: all var(--transition-slower);
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 8px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border: 3px solid var(--color-black);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
  transition: all var(--transition-base);
  z-index: 2;
}

.timeline-item:hover::before {
  animation: dotPulse 1.5s ease infinite;
  box-shadow: 0 0 0 8px rgba(255, 107, 53, 0.3);
}

@keyframes dotPulse {

  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
  }

  50% {
    transform: scale(1.1);
    box-shadow: 0 0 0 8px rgba(255, 107, 53, 0.3);
  }
}

.timeline-item:hover {
  transform: translateX(4px);
}

.timeline-period {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.3);
  border-radius: 50px;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-mono);
}

.timeline-role {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.timeline-company {
  font-size: 1.125rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

.timeline-description {
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

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

.timeline-achievements li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.timeline-achievements li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.skill-card {
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.skill-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 53, 0.05), transparent);
  transition: left var(--transition-slow);
}

.skill-card:hover::after {
  left: 100%;
}

.skill-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.skill-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 107, 53, 0.1);
  border-radius: 8px;
}

.skill-icon svg {
  width: 24px;
  height: 24px;
}

.skill-name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.4;
}

/* Skill Popup/Tooltip */
.skill-popup {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: rgba(18, 18, 18, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-light);
  border-radius: 12px;
  padding: var(--spacing-md) var(--spacing-lg);
  min-width: 280px;
  max-width: 320px;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 100;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.skill-card:hover .skill-popup {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* Arrow for popup */
.skill-popup::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid rgba(18, 18, 18, 0.98);
}

.skill-popup::before {
  content: '';
  position: absolute;
  top: calc(100% + 1px);
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 9px solid transparent;
  border-right: 9px solid transparent;
  border-top: 9px solid var(--color-border-light);
}

.popup-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.popup-experiences {
  list-style: none;
  padding: 0;
  margin: 0;
}

.popup-experience {
  margin-bottom: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--color-border);
}

.popup-experience:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.popup-role {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.popup-company {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

/* Mobile popup overlay */
.popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: 99;
  cursor: pointer;
}

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

/* Education Cards */
.info-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.info-card {
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
}

.info-card:hover::before {
  transform: translateX(100%);
}

.info-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 53, 0.05), transparent);
  transition: left var(--transition-slow);
}

.info-card:hover::after {
  left: 100%;
}

.info-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--color-border-light);
  transform: translateY(-4px);
}

.info-icon {
  width: 56px;
  height: 56px;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 107, 53, 0.1);
  border-radius: 12px;
}

.info-icon svg {
  width: 28px;
  height: 28px;
}

/* OSU Logo Styling */
.info-card-with-logo {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.info-logo {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  opacity: 0;
  animation: fadeInScale 0.6s ease forwards;
  animation-delay: 0.3s;
}

.info-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.info-content {
  flex: 1;
}

.info-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
}

.info-subtitle {
  font-size: 1.125rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

.info-detail {
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.license-list {
  list-style: none;
  padding: 0;
  margin-top: var(--spacing-md);
}

.license-list li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  opacity: 0;
  transform: translateX(-10px);
  animation: fadeInRight 0.4s ease forwards;
}

.license-list li:nth-child(1) {
  animation-delay: 0.5s;
}

.license-list li:nth-child(2) {
  animation-delay: 0.7s;
}

.license-list li:nth-child(3) {
  animation-delay: 0.9s;
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.license-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
  animation: checkPop 0.3s ease forwards;
  animation-delay: inherit;
  transform: scale(0);
}

@keyframes checkPop {
  0% {
    transform: scale(0) rotate(-45deg);
  }

  50% {
    transform: scale(1.2) rotate(10deg);
  }

  100% {
    transform: scale(1) rotate(0deg);
  }
}

/* Contact Section */
.contact-section {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: 16px;
}

.contact-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  letter-spacing: -1px;
  color: var(--color-white);
}

.contact-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-xl);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  text-decoration: none;
  color: var(--color-white);
  transition: all var(--transition-base);
  width: fit-content;
  cursor: pointer;
}

.contact-item:hover {
  background: rgba(255, 107, 53, 0.1);
  border-color: var(--color-accent);
  transform: translateX(4px);
}

.contact-icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 100%;
  height: 100%;
}

.contact-text {
  font-weight: 500;
  font-size: 1rem;
}

/* Footer */
footer {
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-3xl);
}

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

/* Responsive Design - Mobile First Approach */

/* Landscape Tablets & Small Desktops (1024px - 1280px) */
@media (max-width: 1280px) {
  .hero {
    gap: 1rem;
  }
  .section {
    padding:  var(--spacing-lg);
    
  }

  .hero h1 {
    font-size: clamp(2.5rem, 4.5vw, 3.5rem);
  }

  .hero .subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  }
}

/* Tablets (768px - 1024px) */
@media (max-width: 1024px) {
  :root {
    --spacing-3xl: 4rem;
    --spacing-2xl: 3rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    padding-top: calc(80px + var(--spacing-2xl));
    min-height: auto;
  }

  .hero-image-container {
    order: -1;
    max-width: 400px;
    margin: 0 auto;
  }

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

  .hero-label {
    margin-left: auto;
    margin-right: auto;
  }

  .hero .description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .social-links {
    justify-content: center;
  }

  .timeline::before {
    left: 10px;
  }

  .timeline-item {
    padding-left: var(--spacing-xl);
  }

  .timeline-item::before {
    left: 4px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  }
}

/* Mobile Devices (480px - 768px) */
@media (max-width: 768px) {
  :root {
    --spacing-3xl: 3rem;
    --spacing-2xl: 2rem;
    --spacing-xl: 2rem;
  }

  body {
    font-size: 15px;
    margin-top: 2rem;
  }

  .nav-content {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .logo {
    font-size: 1.125rem;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links a {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    font-size: 1rem;
    text-align: center;
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .menu-toggle {
    display: flex;
  }

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

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .hero {
    padding: calc(64px + var(--spacing-2xl)) var(--spacing-md) var(--spacing-2xl);
  }

  .hero h1 {
    font-size: clamp(2rem, 7vw, 2.5rem);
    letter-spacing: -1px;
  }

  .hero .subtitle {
    font-size: clamp(1.25rem, 5vw, 1.5rem);
  }

  .hero .description {
    font-size: 1rem;
    line-height: 1.7;
  }

  .hero-label {
    font-size: 0.75rem;
    padding: 0.4rem 0.85rem;
  }

  .hero-image-container {
    max-width: 320px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .stat-card {
    padding: var(--spacing-lg);
  }

  .stat-number {
    font-size: 2.5rem;
  }

  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .skill-card {
    padding: var(--spacing-lg);
  }

  .info-cards {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .info-card {
    padding: var(--spacing-lg);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  .section-header {
    margin-bottom: var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
  }

  .section-label {
    font-size: 0.75rem;
    padding: 0.4rem 0.85rem;
  }

  .section-title {
    font-size: clamp(1.75rem, 6vw, 2.25rem);
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .timeline-role {
    font-size: 1.25rem;
  }

  .timeline-company {
    font-size: 1rem;
  }

  .timeline-description {
    font-size: 0.95rem;
  }

  .timeline-achievements li {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .timeline-period {
    font-size: 0.75rem;
    padding: 0.35rem 0.65rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .contact-section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .contact-title {
    font-size: clamp(1.75rem, 6vw, 2.25rem);
  }

  .contact-subtitle {
    font-size: 1rem;
  }

  .contact-item {
    width: 100%;
    justify-content: center;
    padding: var(--spacing-md);
  }

  .contact-text {
    font-size: 0.95rem;
  }

  .btn {
    padding: 0.875rem 1.75rem;
    font-size: 0.95rem;
  }

  footer {
    padding: var(--spacing-lg) 0;
  }

  footer p {
    font-size: 0.85rem;
  }
}

/* Small Mobile Devices (320px - 480px) */
@media (max-width: 480px) {
  :root {
    --spacing-3xl: 2.5rem;
    --spacing-2xl: 1.75rem;
    --spacing-xl: 1.5rem;
    --spacing-lg: 1.25rem;
  }

  body {
    font-size: 14px;
  }

  .nav-content {
    padding: 0.75rem var(--spacing-sm);
  }

  .logo {
    font-size: 1rem;
  }

  .hero {
    padding: calc(64px + var(--spacing-xl)) var(--spacing-sm) var(--spacing-xl);
    
  }

  .hero h1 {
    font-size: clamp(1.75rem, 8vw, 2rem);
    margin-bottom: var(--spacing-sm);
  }

  .hero .subtitle {
    font-size: clamp(1.125rem, 6vw, 1.25rem);
    margin-bottom: var(--spacing-md);
  }

  .hero .description {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-lg);
  }

  .hero-label {
    font-size: 0.7rem;
    padding: 0.35rem 0.75rem;
    margin-bottom: var(--spacing-md);
  }

  .hero-image-container {
    max-width: 280px;
    
  }

  .hero-cta {
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }

  .social-links {
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
  }

  .social-link {
    width: 40px;
    height: 40px;
  }

  .social-link svg {
    width: 18px;
    height: 18px;
  }

  .stats-grid {
    gap: var(--spacing-sm);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 0.9rem;
  }

  .section {
    padding: var(--spacing-xl) 0;
    gap: var(--spacing-2xl);
  }

  .section-header {
    margin-bottom: var(--spacing-xl);
  }

  .section-label {
    font-size: 0.7rem;
    padding: 0.35rem 0.75rem;
    margin-bottom: var(--spacing-sm);
  }

  .section-title {
    font-size: clamp(1.5rem, 7vw, 1.75rem);
    margin-bottom: var(--spacing-sm);
  }

  .section-subtitle {
    font-size: 0.95rem;
  }

  .timeline {
    padding-left: 0;
  }

  .timeline::before {
    left: 8px;
  }

  .timeline-item {
    padding-left: var(--spacing-lg);
    padding-bottom: var(--spacing-xl);
  }

  .timeline-item::before {
    left: 2px;
    width: 12px;
    height: 12px;
    border-width: 2px;
  }

  .timeline-role {
    font-size: 1.125rem;
    line-height: 1.3;
  }

  .timeline-company {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
  }

  .timeline-description {
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
  }

  .timeline-achievements {
    margin-top: var(--spacing-sm);
  }

  .timeline-achievements li {
    font-size: 0.9rem;
    line-height: 1.5;
    padding-left: var(--spacing-md);
    margin-bottom: 0.5rem;
  }

  .timeline-period {
    font-size: 0.7rem;
    padding: 0.3rem 0.6rem;
  }

  .skills-grid {
    gap: var(--spacing-sm);
  }

  .skill-card {
    padding: var(--spacing-md);
  }

  .skill-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--spacing-sm);
  }

  .skill-icon svg {
    width: 20px;
    height: 20px;
  }

  .skill-name {
    font-size: 1rem;
  }

  /* Mobile popup adjustments */
  .skill-popup {
    min-width: min(260px, calc(100vw - 3rem));
    max-width: calc(100vw - 3rem);
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .popup-title {
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
  }

  .popup-role {
    font-size: 0.9rem;
  }

  .popup-company {
    font-size: 0.8rem;
  }

  .popup-period {
    font-size: 0.7rem;
  }

  .info-cards {
    gap: var(--spacing-md);
  }

  .info-card {
    padding: var(--spacing-md);
  }

  .info-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-sm);
  }

  .info-icon svg {
    width: 24px;
    height: 24px;
  }

  .info-title {
    font-size: 1.25rem;
  }

  .info-subtitle {
    font-size: 1rem;
  }

  .info-detail {
    font-size: 0.9rem;
  }

  .license-list {
    margin-top: var(--spacing-sm);
  }

  .license-list li {
    font-size: 0.9rem;
    padding-left: var(--spacing-md);
  }

  /* Mobile OSU logo adjustments */
  .info-logo {
    width: 60px;
    height: 60px;
  }

  .info-card-with-logo {
    gap: var(--spacing-md);
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .contact-section {
    padding: var(--spacing-xl) var(--spacing-sm);
    border-radius: 12px;
    margin-top: 1rem;
  }

  .contact-title {
    font-size: clamp(1.5rem, 7vw, 1.75rem);
    margin-bottom: var(--spacing-sm);
  }

  .contact-subtitle {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xl);
  }

  .contact-methods {
    gap: var(--spacing-sm);
  }

  .contact-item {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .contact-icon {
    width: 18px;
    height: 18px;
  }

  .contact-text {
    font-size: 0.9rem;
  }

  footer {
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-2xl);
  }

  footer p {
    font-size: 0.8rem;
    padding: 0 var(--spacing-sm);
  }
}

/* Extra Small Devices (< 375px) */
@media (max-width: 374px) {
  .hero h1 {
    font-size: 1.5rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .hero .description {
    font-size: 0.9rem;
  }

  .hero-image-container {
    max-width: 240px;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .contact-title {
    font-size: 1.5rem;
  }
}

/* Landscape Orientation on Mobile */
@media (max-width: 896px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: calc(64px + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
  }

  .hero-image-container {
    max-width: 200px;
  }

  .section {
    padding: var(--spacing-lg) 0;
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {

  /* Increase touch target sizes */
  .btn,
  .nav-links a,
  .contact-item,
  .social-link {
    min-height: 44px;
  }

  /* Remove hover effects on touch devices */
  .skill-card:hover,
  .info-card:hover,
  .stat-card:hover {
    transform: none;
  }

  /* Disable hover popups on touch - use tap instead */
  .skill-card:hover .skill-popup {
    opacity: 0;
    pointer-events: none;
  }

  .skill-card.active .skill-popup {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
  }

  /* Add active states instead */
  .btn:active {
    transform: scale(0.98);
  }

  .social-link:active {
    transform: scale(0.95);
  }

  /* Mobile popup positioning */
  .skill-popup {
    position: fixed;
    bottom: auto;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    max-width: calc(100vw - 2rem);
    min-width: min(280px, calc(100vw - 2rem));
  }

  .skill-card.active .skill-popup {
    transform: translate(-50%, -50%) scale(1);
  }

  .skill-popup::after,
  .skill-popup::before {
    display: none;
  }
}

/* Print Styles */
@media print {

  nav,
  .social-links,
  .background-layer {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    page-break-inside: avoid;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}