/*
=====================================================================
*   Modern Portfolio Design System
*   Hongzhi (Harvad) Li - Full Stack Developer
*   Premium, distinctive, non-commercial developer portfolio
*   2026 Edition
=====================================================================
*/

/* ------------------------------------------------------------------ */
/* CSS Variables - Design Tokens
/* ------------------------------------------------------------------ */
:root {
  /* Color System - Premium Dark Theme */
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #18181b;
  --bg-elevated: #1f1f23;
  
  /* Accent Colors - Vibrant but Refined */
  --accent-primary: #6366f1;      /* Indigo */
  --accent-secondary: #22d3ee;    /* Cyan */
  --accent-tertiary: #a855f7;     /* Purple */
  --accent-success: #10b981;      /* Emerald */
  --accent-warning: #f59e0b;      /* Amber */
  
  /* Gradient Tokens */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --gradient-secondary: linear-gradient(135deg, #22d3ee 0%, #6366f1 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  
  /* Text Colors */
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --text-accent: #6366f1;
  
  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  
  /* 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;
  --space-4xl: 6rem;
  
  /* Typography */
  --font-display: 'Sora', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ------------------------------------------------------------------ */
/* Typography Imports
/* ------------------------------------------------------------------ */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

/* Noise texture overlay for depth */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  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='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.015;
  pointer-events: none;
  z-index: 9999;
}

/* ------------------------------------------------------------------ */
/* Animated Background Gradient
/* ------------------------------------------------------------------ */
.gradient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.gradient-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 40% 80%, rgba(34, 211, 238, 0.04) 0%, transparent 30%);
  animation: gradientMove 20s ease-in-out infinite;
}

@keyframes gradientMove {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(-5%, -5%) rotate(5deg); }
  50% { transform: translate(5%, 5%) rotate(-3deg); }
  75% { transform: translate(-3%, 5%) rotate(3deg); }
}

/* ------------------------------------------------------------------ */
/* Navigation - Glassmorphism Header
/* ------------------------------------------------------------------ */
.nav-modern {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) var(--space-xl);
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: var(--transition-base);
}

.nav-modern.scrolled {
  background: rgba(10, 10, 11, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
}

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

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-links a.active::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
}

/* ------------------------------------------------------------------ */
/* Hero Section
/* ------------------------------------------------------------------ */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4xl) var(--space-xl);
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 1000px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.6s ease-out;
}

.hero-badge .status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.2); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 var(--space-lg) 0;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-2xl) auto;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

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

/* ------------------------------------------------------------------ */
/* Buttons
/* ------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--glass-bg);
}

/* ------------------------------------------------------------------ */
/* Social Links
/* ------------------------------------------------------------------ */
.social-links-modern {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-2xl);
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.social-link {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 1.2rem;
  text-decoration: none;
  transition: var(--transition-base);
}

.social-link:hover {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.1);
  border-color: var(--accent-primary);
  transform: translateY(-3px);
}

/* ------------------------------------------------------------------ */
/* Section Styles
/* ------------------------------------------------------------------ */
.section {
  padding: var(--space-4xl) var(--space-xl);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.section-label::before,
.section-label::after {
  content: '';
  width: 30px;
  height: 1px;
  background: var(--accent-primary);
  opacity: 0.5;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin: 0 0 var(--space-md) 0;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

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

/* ------------------------------------------------------------------ */
/* Skills Section - Tech Stack Grid
/* ------------------------------------------------------------------ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.skill-category {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: var(--transition-base);
}

.skill-category:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.skill-category-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  font-size: 1.4rem;
}

.skill-category-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

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

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.skill-tag:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
}

/* Skill tag with proficiency indicator */
.skill-tag.expert::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-success);
  border-radius: 50%;
}

.skill-tag.advanced::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-primary);
  border-radius: 50%;
}

/* ------------------------------------------------------------------ */
/* Project Cards
/* ------------------------------------------------------------------ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
  position: relative;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition-base);
}

.project-card:hover {
  border-color: rgba(99, 102, 241, 0.5);
  transform: translateY(-8px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

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

.project-card-content {
  padding: var(--space-xl);
}

.project-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-success);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

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

.project-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0 0 var(--space-md) 0;
  color: var(--text-primary);
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

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

.project-tech-tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-secondary);
}

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

/* ------------------------------------------------------------------ */
/* About Section
/* ------------------------------------------------------------------ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-image-container {
  position: relative;
}

.about-image {
  width: 100%;
  max-width: 300px;
  border-radius: var(--radius-xl);
  border: 2px solid var(--glass-border);
  transition: var(--transition-base);
}

.about-image:hover {
  border-color: var(--accent-primary);
  transform: scale(1.02);
}

.about-image-decoration {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100px;
  height: 100px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  opacity: 0.3;
  z-index: -1;
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 var(--space-lg) 0;
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  font-size: 1.05rem;
}

.about-stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--glass-border);
}

.stat-item {
  text-align: left;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

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

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-primary), var(--accent-tertiary));
  border-radius: var(--radius-full);
}

.timeline-item {
  position: relative;
  padding-left: var(--space-3xl);
  padding-bottom: var(--space-2xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 0;
  width: 16px;
  height: 16px;
  background: var(--accent-primary);
  border: 3px solid var(--bg-primary);
  border-radius: 50%;
}

.timeline-item:hover::before {
  transform: scale(1.3);
  box-shadow: 0 0 20px var(--accent-primary);
}

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

.timeline-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

.timeline-company {
  color: var(--accent-primary);
  font-weight: 500;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: var(--space-xs) var(--space-md);
  background: var(--glass-bg);
  border-radius: var(--radius-sm);
}

.timeline-description {
  color: var(--text-secondary);
  line-height: 1.8;
}

.timeline-description ul {
  margin: var(--space-md) 0 0 0;
  padding-left: var(--space-lg);
}

.timeline-description li {
  margin-bottom: var(--space-sm);
}

/* ------------------------------------------------------------------ */
/* Footer
/* ------------------------------------------------------------------ */
.footer-modern {
  padding: var(--space-4xl) var(--space-xl) var(--space-2xl);
  border-top: 1px solid var(--glass-border);
  background: var(--bg-secondary);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: var(--space-md);
  max-width: 300px;
}

.footer-section-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--space-lg) 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

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

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  max-width: 1200px;
  margin: var(--space-3xl) auto 0;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

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

.footer-note a {
  color: var(--accent-primary);
  text-decoration: none;
}

/* ------------------------------------------------------------------ */
/* LinkedIn Posts Section
/* ------------------------------------------------------------------ */
.linkedin-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.linkedin-post-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: var(--transition-base);
}

.linkedin-post-card:hover {
  border-color: #0a66c2;
  transform: translateY(-4px);
}

/* ------------------------------------------------------------------ */
/* GitHub Repos Section  
/* ------------------------------------------------------------------ */
.github-repos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.repo-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: var(--transition-base);
}

.repo-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}

.repo-name {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin: 0 0 var(--space-sm) 0;
}

.repo-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.repo-stats {
  display: flex;
  gap: var(--space-lg);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.repo-stat {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* ------------------------------------------------------------------ */
/* Responsive Design
/* ------------------------------------------------------------------ */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .about-image-container {
    text-align: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-section {
    padding: var(--space-3xl) var(--space-md);
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-cta .btn {
    width: 100%;
    justify-content: center;
  }
  
  .section {
    padding: var(--space-3xl) var(--space-md);
  }
  
  .about-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .timeline::before {
    left: 8px;
  }
  
  .timeline-item {
    padding-left: var(--space-2xl);
  }
  
  .timeline-item::before {
    left: 0;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .skill-category {
    padding: var(--space-lg);
  }
}

/* ------------------------------------------------------------------ */
/* Scrollbar Styling
/* ------------------------------------------------------------------ */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* ------------------------------------------------------------------ */
/* Selection Styling
/* ------------------------------------------------------------------ */
::selection {
  background: var(--accent-primary);
  color: white;
}

/* ------------------------------------------------------------------ */
/* Focus States for Accessibility
/* ------------------------------------------------------------------ */
*:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ------------------------------------------------------------------ */
/* Loading State Animation
/* ------------------------------------------------------------------ */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-elevated) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

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

/* ------------------------------------------------------------------ */
/* Personal Brand - Journey Theme (2026 Edition)
/* ------------------------------------------------------------------ */

/* Personal brand accent colors */
.text-tiani {
  color: #C8846D;
  position: relative;
}

.text-tiani::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #C8846D, transparent);
}

.text-gothenburg {
  color: #22d3ee;
  position: relative;
}

.text-gothenburg::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #22d3ee, transparent);
}

/* Hero badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  animation: fadeInDown 0.6s ease-out;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.1); }
}

/* Hero narrative hook */
.hero-narrative-hook {
  font-family: 'Newsreader', serif;
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 600px;
  margin: var(--space-xl) auto var(--space-2xl);
  opacity: 0;
  animation: fadeInNarrative 1s ease-out 0.3s forwards;
}

.hero-narrative-hook em {
  color: var(--accent-secondary);
  font-weight: 500;
  font-style: normal;
}

@keyframes fadeInNarrative {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* CTA button row */
.hero-cta-row {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.button-primary {
  background: var(--gradient-primary);
  color: white;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-spring);
  text-decoration: none;
  display: inline-block;
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.button-outline {
  background: transparent;
  color: var(--text-primary);
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  border: 1px solid var(--glass-border);
  transition: all var(--transition-base);
  text-decoration: none;
  display: inline-block;
}

.button-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

/* ------------------------------------------------------------------ */
/* Journey Timeline Styles
/* ------------------------------------------------------------------ */
.journey-page {
  padding: var(--space-4xl) var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.journey-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.journey-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.journey-header p {
  font-family: 'Newsreader', serif;
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-style: italic;
}

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

.journey-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-primary), var(--accent-tertiary), transparent);
}

.journey-milestone {
  position: relative;
  margin-bottom: var(--space-4xl);
  padding-left: var(--space-xl);
}

.journey-milestone::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-2xl) - 6px);
  top: 8px;
  width: 14px;
  height: 14px;
  background: var(--bg-primary);
  border: 3px solid var(--accent-primary);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.journey-milestone:hover::before {
  background: var(--accent-primary);
  transform: scale(1.2);
}

.journey-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  font-weight: 500;
  margin-bottom: var(--space-xs);
  letter-spacing: 0.05em;
}

.journey-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.journey-location {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.journey-description {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.journey-description p {
  margin-bottom: var(--space-md);
}

.journey-description ul {
  margin: var(--space-md) 0;
  padding-left: var(--space-lg);
}

.journey-description li {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

/* Journey card styling */
.journey-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-lg);
  transition: all var(--transition-base);
}

.journey-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow);
}

/* Key achievement highlights */
.journey-highlight {
  display: inline-block;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-secondary);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-right: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* Cross-cultural tag */
.cultural-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(168, 85, 247, 0.1);
  color: var(--accent-tertiary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  margin-right: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* Scroll progress indicator */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-primary);
  z-index: 9999;
  width: 0%;
  transition: width 0.1s ease-out;
}

/* Narrative text class */
.narrative-text {
  font-family: 'Newsreader', serif;
  font-size: 1.1rem;
  line-height: 1.9;
  color: var(--text-secondary);
}

.narrative-text em {
  color: var(--accent-secondary);
  font-style: normal;
}