/* ============================================
   KevinTen Personal Website - Main Styles
   Modern Professional Design
   ============================================ */

/* ============================================
   Accessibility - Skip to Content
   ============================================ */

.skip-to-content {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: white;
  font-weight: var(--font-medium);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: var(--space-4);
  outline: 3px solid white;
  outline-offset: 2px;
}

/* ============================================
   Navigation - Fixed Top Bar Design
   ============================================ */

.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-subtle);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.nav-header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .nav-header {
  background: rgba(250, 250, 250, 0.8);
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .nav-header.scrolled {
  background: rgba(250, 250, 250, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-base);
}

.nav-logo:hover {
  transform: translateY(-1px);
}

.nav-logo img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 2px solid var(--color-primary-alpha-30);
  transition: all var(--transition-base);
}

.nav-logo:hover img {
  border-color: rgba(59, 130, 246, 0.6);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  padding: var(--space-2) var(--space-3);
  border-radius: 8px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent-indigo);
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  cursor: pointer;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
  left: 0;
}

@media (min-width: 768px) and (max-width: 1200px) {
  .nav-links {
    gap: 0;
  }

  .nav-link {
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
  }
}

/* Theme Toggle Button - Modern Design */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 12px;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.theme-toggle-btn:hover {
  background: rgba(37, 99, 235, 0.15);
  border-color: rgba(37, 99, 235, 0.4);
  color: var(--color-text);
  box-shadow: var(--bento-shadow-md);
}

.theme-toggle-btn:hover::before {
  opacity: 0.1;
}

.theme-toggle-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.theme-toggle-btn .theme-icon {
  position: absolute;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn .moon-icon {
  opacity: 0;
  transform: rotate(-180deg) scale(0.5);
}

/* Dark theme: show sun icon */
[data-theme="dark"] .theme-toggle-btn .sun-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

/* Light theme: show moon icon */
[data-theme="light"] .theme-toggle-btn .moon-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-toggle-btn .sun-icon {
  opacity: 0;
  transform: rotate(180deg) scale(0.5);
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-actions .btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  border-radius: 10px;
}

/* Theme transition */
html {
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

body,
.section,
.project-card,
.writing-card,
.modal-content,
.contact-item {
  transition: background-color var(--transition-slow),
               border-color var(--transition-slow),
               color var(--transition-slow),
               box-shadow var(--transition-slow);
}

/* ============================================
   Professional Card Styles - Modern Design
   ============================================ */

/* Professional Card - Modern Style */
.card-cyber {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.card-cyber:hover {
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--bento-shadow-hover);
}

/* Professional Text Highlight */
.neon-text {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.neon-text-purple {
  color: var(--color-secondary);
  font-weight: var(--font-semibold);
}

.neon-text-pink {
  color: var(--color-accent);
  font-weight: var(--font-semibold);
}

/* Professional Border */
.tech-border {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  position: relative;
  transition: border-color 0.3s ease;
}

.tech-border:hover {
  border-color: var(--color-border-glow);
}

.tech-border::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-cyber);
  border-radius: 22px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
  background-size: 200% 200%;
}

.tech-border:hover::after {
  opacity: 0.6;
}

/* Base body styles */
body {
  overflow-x: hidden;
}

/* Hero Section - Modern Glassmorphism Design
   ============================================ */

/* Hero Header - Title Section (main definition at line ~3170) */

/* Profile Card Styles */
.profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.highlight-icon {
  font-size: var(--text-base);
}

/* Hero Scroll */
.hero-scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-muted);
  animation: bounce 2s infinite;
  z-index: 1;
}

/* ============================================
   Original Hero Section - Modern Glassmorphism Design (Legacy)
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-height) + var(--space-8)) var(--space-6) var(--space-24);
  background: var(--color-bg);
  overflow: hidden;
}

/* Subtle Grid Background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* Ambient Glow — Indigo (top-left) */
.hero::after {
  content: '';
  position: absolute;
  top: 30%;
  left: 25%;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-indigo-alpha-10) 0%, transparent 70%);
  filter: blur(50px);
  z-index: 0;
  pointer-events: none;
}

/* Ambient Glow — Cyan (bottom-right) */
.hero-glow-cyan {
  position: absolute;
  bottom: 20%;
  right: 15%;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-cyan-alpha-8) 0%, transparent 70%);
  filter: blur(40px);
  z-index: 0;
  pointer-events: none;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: var(--leading-tight);
  color: #FAFAFA;
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
  animation: fadeInUp var(--transition-slower) ease-out;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  animation: fadeInUp var(--transition-slow) ease-out 0.2s both;
  line-height: var(--leading-relaxed);
}

.hero-realname {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  margin-bottom: var(--space-5);
  animation: fadeInUp var(--transition-slow) ease-out 0.25s both;
  opacity: 0.8;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 650px;
  margin: 0 auto var(--space-10);
  animation: fadeInUp var(--transition-slow) ease-out 0.3s both;
  line-height: 1.8;
  letter-spacing: 0.01em;
}

.hero-description strong {
  color: var(--color-text);
  font-weight: var(--font-semibold);
}

/* Account Matrix - Bento Card 内的账号矩阵 */
.account-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.account-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-normal) ease;
  position: relative;
  cursor: pointer;
}

.account-card:hover {
  background: var(--color-primary-alpha);
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: translateY(-2px);
}

.account-card:active {
  transform: translateY(0);
}

.account-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.account-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

/* 微信公众号 tooltip */
.account-card-wechat {
  position: relative;
}

.account-tooltip {
  position: absolute;
  bottom: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal) ease;
  z-index: 10;
  pointer-events: none;
}

.account-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--glass-bg);
}

.account-card-wechat:hover .account-tooltip,
.account-card-wechat:focus .account-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) scale(1);
}

.tooltip-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  min-width: 120px;
  text-align: center;
}

.tooltip-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.tooltip-qr {
  display: flex;
  justify-content: center;
  padding: var(--space-2);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

.tooltip-qr svg {
  color: var(--color-text-muted);
}

/* 响应式 */
@media (max-width: 640px) {
  .account-matrix {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2);
  }

  .account-card {
    padding: var(--space-3);
  }

  .account-icon {
    width: 20px;
    height: 20px;
  }

  .account-label {
    font-size: var(--text-xs);
  }
}

/* Hero Meta - Modern Badge Design */
.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  animation: fadeInUp var(--transition-slow) ease-out 0.25s both;
  flex-wrap: wrap;
}

.hero-location,
.hero-company,
.hero-availability {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: 20px;
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
}

.hero-location {
  color: var(--color-text-secondary);
  background: rgba(100, 116, 139, 0.1);
  border: 1px solid rgba(100, 116, 139, 0.2);
}

.hero-location:hover {
  background: rgba(100, 116, 139, 0.15);
}

.hero-company {
  color: var(--color-accent);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.hero-company:hover {
  background: rgba(6, 182, 212, 0.15);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.2);
}

.hero-availability.available {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.hero-availability.busy {
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.availability-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}

.desktop-only {
  display: inline;
}

@media (max-width: 768px) {
  .desktop-only {
    display: none;
  }
}

/* Hero Skills Tags - Modern Floating Design */
.hero-skills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  animation: fadeInUp var(--transition-slow) ease-out 0.35s both;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(10px);
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.skill-tag:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* Skill Tag Color Variants - More Subtle */
.skill-tag.java {
  background: linear-gradient(135deg, rgba(176, 114, 25, 0.15), rgba(176, 114, 25, 0.08));
  border-color: rgba(176, 114, 25, 0.3);
  color: #FBBF24;
}

.skill-tag.python {
  background: linear-gradient(135deg, rgba(55, 118, 171, 0.15), rgba(55, 118, 171, 0.08));
  border-color: rgba(55, 118, 171, 0.3);
  color: #60A5FA;
}

.skill-tag.go {
  background: linear-gradient(135deg, rgba(0, 173, 216, 0.15), rgba(0, 173, 216, 0.08));
  border-color: rgba(0, 173, 216, 0.3);
  color: #22D3EE;
}

.skill-tag.ai {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(139, 92, 246, 0.08));
  border-color: rgba(139, 92, 246, 0.3);
  color: #A78BFA;
}

.skill-tag.cloud {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(6, 182, 212, 0.08));
  border-color: rgba(6, 182, 212, 0.3);
  color: #22D3EE;
}

.skill-tag.dubbo {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.15), rgba(249, 115, 22, 0.08));
  border-color: rgba(249, 115, 22, 0.3);
  color: #FB923C;
}

.skill-tag.dapr {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.15), rgba(34, 197, 94, 0.08));
  border-color: rgba(34, 197, 94, 0.3);
  color: #4ADE80;
}

.skill-tag.reactive {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.15), rgba(236, 72, 153, 0.08));
  border-color: rgba(236, 72, 153, 0.3);
  color: #F472B6;
}

/* ============================================
   Buttons - Modern Pill Design
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-7);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: var(--leading-none);
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 200ms ease;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-indigo);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-accent-indigo);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-indigo-light);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

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

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

.btn-lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-base);
  border-radius: 12px;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  border-radius: 8px;
}

.btn-secondary:active {
  transform: scale(0.98);
}

/* Loading state for buttons */
.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid var(--color-text);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Button focus enhancement */
.btn:focus-visible {
  outline-offset: 4px;
}

/* ============================================
   Section Styles - Modern Design
   ============================================ */

.section {
  padding: 6rem var(--space-6);
  position: relative;
}

.section-spacious {
  padding: 7rem var(--space-6);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-16);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #FAFAFA;
  margin-bottom: var(--space-4);
  position: relative;
}

.section-description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  letter-spacing: 0.01em;
}

[data-theme="light"] .section-title {
  color: #18181B;
}

[data-theme="light"] .hero-title {
  color: #18181B;
}

/* Light theme hero adjustments */
[data-theme="light"] .hero::before {
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
}

[data-theme="light"] .hero::after {
  background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
}

[data-theme="light"] .hero-glow-cyan {
  background: radial-gradient(circle, rgba(6, 182, 212, 0.04) 0%, transparent 70%);
}

/* ============================================
   About Me Section - Modern Glassmorphism Cards
   ============================================ */

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}

.about-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-8);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
}

.about-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.about-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 16px;
  color: white;
  margin-bottom: var(--space-5);
  box-shadow: 0 8px 20px var(--color-primary-alpha-30);
  position: relative;
  z-index: 1;
}

.about-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
}

.about-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* Impact Cards - Modern Badges */
.about-impact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
  position: relative;
  z-index: 1;
}

.impact-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  background: var(--color-primary-alpha-15);
  color: #60A5FA;
  border: 1px solid var(--color-primary-alpha-30);
  box-shadow: 0 2px 8px var(--color-primary-alpha-10);
}

.interests-section {
  text-align: center;
  padding: var(--space-10);
  background: rgba(30, 41, 59, 0.4);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: var(--space-8);
}

.interests-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.interests-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.interest-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  background: var(--color-primary-alpha-10);
  backdrop-filter: blur(10px);
  color: var(--color-text);
  border: 1px solid var(--color-primary-alpha-20);
  transition: all var(--transition-base);
}

.interest-tag:hover {
  transform: translateY(-3px);
  background: var(--color-primary-alpha-15);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 8px 20px var(--color-primary-alpha-20);
}

/* ============================================
   Work Experience Timeline - Modern Design
   ============================================ */

.experience-timeline {
  max-width: var(--container-xl);
  margin: 0 auto;
}

.experience-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
  position: relative;
}

.experience-card::before {
  content: '';
  position: absolute;
  left: 175px;
  top: 45px;
  bottom: -45px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary) 0%, rgba(59, 130, 246, 0.2) 100%);
  opacity: 0.3;
}

.experience-card:last-child::before {
  display: none;
}

.experience-period {
  position: relative;
  padding-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-accent);
  text-align: right;
}

.experience-period::before {
  content: '';
  position: absolute;
  right: -32px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow:
    0 0 0 3px rgba(6, 182, 212, 0.3),
    0 0 12px rgba(6, 182, 212, 0.4);
}

.experience-card.featured .experience-period::before {
  background: var(--color-secondary);
  box-shadow:
    0 0 0 3px rgba(139, 92, 246, 0.3),
    0 0 12px rgba(139, 92, 246, 0.4);
}

.experience-content {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-8);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

/* Experience Header - Modern Design */
.experience-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.experience-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 16px;
  background: var(--color-card-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
}

.meta-tag.role {
  background: var(--color-primary-alpha-15);
  border-color: var(--color-primary-alpha-30);
  color: #60A5FA;
}

.meta-tag.team {
  background: rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.3);
  color: #22D3EE;
}

.meta-tag.impact {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34D399;
}

.experience-content:hover {
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.experience-card.featured .experience-content {
  border-color: rgba(139, 92, 246, 0.2);
}

.experience-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.experience-company {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.experience-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.experience-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.highlight-icon {
  font-size: var(--text-base);
  flex-shrink: 0;
}

.experience-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-badge {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 16px;
  background: var(--color-card-bg);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
  transition: all var(--transition-base);
}

.tech-badge:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary-alpha-30);
  color: var(--color-text-secondary);
}

.tech-badge.primary {
  background: var(--color-primary-alpha-15);
  color: #60A5FA;
  border-color: var(--color-primary-alpha-30);
}

.tech-badge.primary:hover {
  transform: translateY(-2px);
  background: rgba(59, 130, 246, 0.25);
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 4px 12px var(--color-primary-alpha-20);
}

@media (max-width: 768px) {
  .experience-card {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .experience-card::before {
    display: none;
  }

  .experience-period {
    text-align: left;
    padding-left: var(--space-4);
  }

  .experience-period::before {
    right: auto;
    left: 0;
  }
}

/* ============================================
   Projects Grid - Modern Glassmorphism Design
   ============================================ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
  max-width: var(--container-xl);
  margin: 0 auto;
}

.project-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-7);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.project-card.featured {
  border-color: var(--color-accent-indigo-alpha-20);
}

.project-card:focus-within {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--card-shadow-hover);
}

.project-cover {
  width: calc(100% + var(--space-5) * 2);
  height: 140px;
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  margin: calc(-1 * var(--space-5)) calc(-1 * var(--space-5)) var(--space-4) calc(-1 * var(--space-5));
}

.project-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.project-card:hover .project-cover img {
  transform: scale(1.05);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
}

.project-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.project-stats-badge {
  display: flex;
  gap: var(--space-2);
}

.stat-badge {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.project-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
}

.project-title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.project-title a:hover {
  color: var(--color-primary);
}

.project-description {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.project-footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.language-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.language-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
}

.language-badge.java .language-dot {
  background: var(--color-java);
}

.language-badge.go .language-dot {
  background: var(--color-go);
}

.contribution-badge {
  padding: var(--space-1) var(--space-2);
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: white;
  font-weight: var(--font-medium);
}

.award-badge {
  padding: var(--space-1) var(--space-2);
  background: linear-gradient(135deg, #F59E0B 0%, #F97316 100%);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: white;
  font-weight: var(--font-medium);
}

/* ============================================
   Tech Stack
   ============================================ */

.tech-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  max-width: var(--container-xl);
  margin: 0 auto;
}

.tech-category {
  text-align: center;
}

.tech-category-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Proficiency Indicators */
.proficiency-indicator {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.proficiency-indicator.expert {
  background: linear-gradient(135deg, #10B981, #059669);
  color: white;
}

.proficiency-indicator.advanced {
  background: linear-gradient(135deg, #3B82F6, #2563EB);
  color: white;
}

.proficiency-indicator.proficient {
  background: linear-gradient(135deg, #8B5CF6, #7C3AED);
  color: white;
}

.proficiency-indicator.familiar {
  background: linear-gradient(135deg, #64748B, #475569);
  color: white;
}

/* Tech Tag Proficiency Levels */
.tech-tag.expert {
  position: relative;
}

.tech-tag.expert::after {
  content: '⭐';
  margin-left: var(--space-2);
  font-size: var(--text-xs);
}

.tech-tag.advanced {
  opacity: 0.95;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.tech-tag {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
  cursor: default;
}

.tech-tag.primary {
  background: var(--gradient-primary);
  color: white;
}

.tech-tag.secondary {
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.tech-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Tech Tag Color Variants */
.tech-tag.java-tag { background: linear-gradient(135deg, #B07219, #8B5A00); color: white; }
.tech-tag.go-tag { background: linear-gradient(135deg, #00ADD8, #007D9C); color: white; }
.tech-tag.python-tag { background: linear-gradient(135deg, #3776AB, #265680); color: white; }
.tech-tag.js-tag { background: linear-gradient(135deg, #F7DF1E, #D4BE00); color: #1a1a1a; }

.tech-tag.dubbo-tag { background: linear-gradient(135deg, #F97316, #EA580C); color: white; }
.tech-tag.dapr-tag { background: linear-gradient(135deg, #22C55E, #16A34A); color: white; }
.tech-tag.layotto-tag { background: linear-gradient(135deg, #8B5CF6, #7C3AED); color: white; }
.tech-tag.spring-tag { background: linear-gradient(135deg, #6DB33F, #5A9E32); color: white; }
.tech-tag.webflux-tag { background: linear-gradient(135deg, #6DB33F, #88C425); color: white; }
.tech-tag.netty-tag { background: linear-gradient(135deg, #F59E0B, #D97706); color: white; }
.tech-tag.grpc-tag { background: linear-gradient(135deg, #2D72D2, #1E5BB8); color: white; }

.tech-tag.k8s-tag { background: linear-gradient(135deg, #326CE5, #2654C7); color: white; }
.tech-tag.servicemesh-tag { background: linear-gradient(135deg, #006175, #004D61); color: white; }
.tech-tag.envoy-tag { background: linear-gradient(135deg, #5265CA, #4351B8); color: white; }
.tech-tag.docker-tag { background: linear-gradient(135deg, #2496ED, #1B7BC9); color: white; }

.tech-tag.ai-tag { background: linear-gradient(135deg, #8B5CF6, #7C3AED); color: white; }
.tech-tag.mcp-tag { background: linear-gradient(135deg, #EC4899, #DB2777); color: white; }
.tech-tag.cursor-tag { background: linear-gradient(135deg, #000000, #1a1a1a); color: white; }
.tech-tag.claude-tag { background: linear-gradient(135deg, #CC785C, #B85C45); color: white; }
.tech-tag.dify-tag { background: linear-gradient(135deg, #6366F1, #4F46E5); color: white; }
.tech-tag.rag-tag { background: linear-gradient(135deg, #10B981, #059669); color: white; }

.tech-tag.reactor-tag { background: linear-gradient(135deg, #00B4AB, #009A92); color: white; }
.tech-tag.tomcat-tag { background: linear-gradient(135deg, #F89820, #E38815); color: white; }

.tech-tag.ddd-tag { background: linear-gradient(135deg, #3B82F6, #2563EB); color: white; }
.tech-tag.reactive-tag { background: linear-gradient(135deg, #EC4899, #DB2777); color: white; }
.tech-tag.pattern-tag { background: linear-gradient(135deg, #64748B, #475569); color: white; }
.tech-tag.chaos-tag { background: linear-gradient(135deg, #EF4444, #DC2626); color: white; }

/* ============================================
   Contributions
   ============================================ */

.contributions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  max-width: var(--container-lg);
  margin: 0 auto;
}

.contribution-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.contribution-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.contribution-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  color: white;
}

.contribution-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.contribution-description {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* Enhanced Contributions Styles */
.contributions-enhanced {
  max-width: var(--container-xl);
  margin: 0 auto;
}

.contribution-category {
  margin-bottom: var(--space-10);
}

.category-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-border);
}

.contribution-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.project-link-icon {
  font-size: var(--text-xl);
  color: var(--color-accent);
  font-weight: bold;
  transition: transform var(--transition-base);
}

.project-card-link:hover .project-link-icon {
  transform: translateX(4px);
}

.contribution-role {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-bg);
  margin-top: var(--space-3);
}

/* Contribution Icon Color Variants */
.contribution-icon.vrml-icon { background: linear-gradient(135deg, #3B82F6, #2563EB); }
.contribution-icon.capa-icon { background: linear-gradient(135deg, #8B5CF6, #7C3AED); }
.contribution-icon.dubbo-icon { background: linear-gradient(135deg, #F97316, #EA580C); }
.contribution-icon.dapr-icon { background: linear-gradient(135deg, #22C55E, #16A34A); }
.contribution-icon.layotto-icon { background: linear-gradient(135deg, #8B5CF6, #7C3AED); }
.contribution-icon.reactor-icon { background: linear-gradient(135deg, #00B4AB, #009A92); }

/* Open Source Stats */
.opensource-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--color-border-glow);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.stat-icon {
  font-size: var(--text-3xl);
}

.stat-content {
  flex: 1;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  font-family: var(--font-mono);
}

/* ============================================
   Awards Section
   ============================================ */

.awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  max-width: var(--container-xl);
  margin: 0 auto var(--space-10);
}

.award-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-6);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.award-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

/* Award Types — left accent border */
.award-card.gold {
  border-left: 4px solid #F59E0B;
}

.award-card.silver {
  border-left: 4px solid #94A3B8;
}

.award-card.bronze {
  border-left: 4px solid #D97706;
}

.award-card.excellence {
  border-left: 4px solid var(--color-accent-cyan);
}

.award-card.chengguo {
  border-left: 4px solid var(--color-accent-indigo);
}

.award-card.architecture {
  border-left: 4px solid #8B5CF6;
}

.award-badge-large {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-3);
}

.award-year {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.award-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.award-project {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.award-role {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

/* Achievement Summary */
.achievement-summary {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-8);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.achievement-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.achievement-icon {
  font-size: var(--text-2xl);
}

.achievement-text {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

.achievement-text strong {
  color: var(--color-primary);
  font-size: var(--text-lg);
}

/* ============================================
   Table of Contents (TOC) Sidebar
   ============================================ */

.toc-sidebar {
  position: fixed;
  right: var(--space-6);
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-xl);
  transition: all var(--transition-base);
}

.toc-sidebar.toc-hidden {
  display: none;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toc-item {
  margin: 0;
}

.toc-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.toc-link:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  transform: translateX(-2px);
}

.toc-link.toc-active {
  background: var(--gradient-primary);
  color: white;
  font-weight: var(--font-semibold);
  box-shadow: var(--glow-primary);
}

.toc-icon {
  font-size: var(--text-base);
  line-height: 1;
}

.toc-label {
  line-height: 1.4;
}

@media (max-width: 1199px) {
  .toc-sidebar {
    display: none;
  }
}

/* Particle system removed in UI modernization */

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

  /* Respect user's motion preferences */
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   Touch-Friendly Interactions
   ============================================ */

/* Ensure touch targets are at least 44x44px */
@media (pointer: coarse) {
  .btn,
  .nav-link,
  .writing-card,
  .project-card,
  .contact-item,
  button {
    min-height: 44px;
    min-width: 44px;
  }

  .project-quick-view-btn {
    padding: var(--space-3) var(--space-4);
  }
}

/* Touch feedback for mobile devices */
@media (hover: none) and (pointer: coarse) {
  .btn:active,
  .nav-link:active {
    background: var(--color-bg-tertiary);
    transform: scale(0.98);
  }

  .project-card:active {
    transform: scale(0.98);
  }

  .writing-card:active {
    transform: scale(0.98);
  }
}

/* ============================================
   Enhanced Focus Styles
   ============================================ */

/* Better focus indicators for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip link enhancement */
.skip-to-content {
  top: -100%;
  transition: top var(--transition-base);
}

.skip-to-content:focus {
  top: var(--space-4);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn-primary {
    border: 2px solid currentColor;
  }

  .project-card,
  .writing-card {
    border-width: 2px;
  }
}

/* Mobile Navigation

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 32px;
  padding: 4px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: var(--z-sticky);
}

.mobile-menu-btn .hamburger {
  width: 24px;
  height: 3px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.mobile-menu-btn.active .hamburger:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}

.mobile-menu-btn.active .hamburger:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active .hamburger:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  pointer-events: none;
}

.mobile-nav.active {
  pointer-events: auto;
}

.mobile-nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-nav.active .mobile-nav-backdrop {
  opacity: 1;
}

.mobile-nav-content {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 80%;
  max-width: 300px;
  background: var(--color-bg-secondary);
  border-left: 1px solid var(--color-border);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.mobile-nav.active .mobile-nav-content {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.mobile-nav-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  gap: var(--space-2);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-primary);
}

.mobile-nav-footer {
  margin-top: auto;
  padding: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* ============================================
   Writing/Blog Section - Modern Card Design
   ============================================ */

.writing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  max-width: var(--container-xl);
  margin: 0 auto var(--space-12);
}

.writing-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-7);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
}

.writing-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.writing-icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  margin-bottom: var(--space-5);
  box-shadow: 0 8px 20px rgba(6, 182, 212, 0.3);
}

.writing-category {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: rgba(6, 182, 212, 0.15);
  border-radius: 16px;
  font-size: var(--text-xs);
  color: #22D3EE;
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-4);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.writing-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
}

.writing-title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.writing-title a:hover {
  color: var(--color-primary);
}

.writing-excerpt {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.writing-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
}

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

/* ============================================
   Contact Section
   ============================================ */

.contact-section {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  max-width: var(--container-xl);
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 20px;
  transition: all var(--transition-base);
}

.contact-item:hover {
  border-color: var(--color-primary-alpha-30);
  transform: translateX(8px);
  box-shadow: 0 8px 24px var(--color-primary-alpha-15);
}

.contact-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 8px 20px var(--color-primary-alpha-30);
}

.contact-details h4 {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-details a,
.contact-details span {
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-base);
  font-weight: var(--font-medium);
}

.contact-details a:hover {
  color: var(--color-primary);
}

.contact-cta {
  display: flex;
  align-items: center;
}

.availability-card {
  padding: var(--space-10);
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 24px;
  width: 100%;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.availability-header {
  margin-bottom: var(--space-4);
}

.availability-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.availability-status.available {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.availability-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

.availability-interests {
  list-style: none;
  padding: 0;
  margin: 0;
}

.availability-interests li {
  padding: var(--space-2) 0;
  padding-left: var(--space-6);
  position: relative;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.availability-interests li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* Contact Actions */
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.contact-actions .btn {
  flex: 1;
  min-width: 160px;
  justify-content: center;
}

/* ============================================
   Project Modal
   ============================================ */

.project-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.project-modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-base);
}

.project-modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 1;
}

.modal-close:hover {
  background: var(--color-bg-card);
  color: var(--color-text);
  border-color: var(--color-primary);
}

.modal-body {
  padding: var(--space-8);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.modal-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.modal-meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.modal-stats {
  display: flex;
  gap: var(--space-2);
}

.modal-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.modal-description {
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.modal-tech-stack {
  margin-bottom: var(--space-6);
}

.modal-tech-stack h4 {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.modal-links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.project-quick-view-btn {
  margin-left: auto;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.project-quick-view-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* Modal mobile responsiveness */
@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    max-height: 95vh;
  }

  .modal-body {
    padding: var(--space-6);
  }

  .modal-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .modal-stats {
    justify-content: center;
  }

  .modal-links {
    flex-direction: column;
  }

  .modal-links .btn {
    width: 100%;
  }
}

/* ============================================
   Footer - Modern Glassmorphism Design
   ============================================ */

.footer {
  padding: var(--space-20) var(--space-6);
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.5) 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
  max-width: var(--container-lg);
  margin: 0 auto;
  text-align: center;
}

.footer-quote {
  font-size: var(--text-xl);
  font-style: italic;
  font-weight: var(--font-medium);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition-base);
  padding: var(--space-2) var(--space-4);
  border-radius: 10px;
  font-weight: var(--font-medium);
}

.footer-links a:hover {
  color: var(--color-text);
  background: var(--color-primary-alpha-10);
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
}

.footer-built-with {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  font-style: italic;
  letter-spacing: 0.02em;
}

/* ============================================
   Mobile Navigation
   ============================================ */

/* Medium screen breakpoint (tablets) */
@media (max-width: 1024px) {
  .nav-links {
    gap: var(--space-1);
  }

  .nav-link {
    font-size: var(--text-xs);
    padding: var(--space-2);
  }

  .nav-logo span {
    display: none;
  }

  .nav-actions {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-header {
    height: var(--header-height-mobile);
  }

  .nav-container {
    padding: 0 var(--space-4);
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-logo span {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  /* Hero Section Mobile */
  .hero {
    padding: calc(var(--header-height-mobile) + var(--space-6)) var(--space-4) var(--space-16);
  }

  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .hero-description {
    font-size: var(--text-sm);
  }

  .hero-skills {
    gap: var(--space-2);
  }

  .skill-tag {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
  }

  /* Section Titles Mobile */
  .section-title {
    font-size: var(--text-2xl);
  }

  .section-description {
    font-size: var(--text-base);
  }

  /* About Grid Mobile */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .about-card {
    padding: var(--space-6);
  }

  /* Experience Timeline Mobile */
  .experience-card {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
  }

  .experience-card::before {
    display: none;
  }

  .experience-period {
    text-align: left;
    padding-left: var(--space-4);
  }

  .experience-period::before {
    right: auto;
    left: 0;
  }

  .experience-content {
    padding: var(--space-6);
  }

  /* Projects Grid Mobile */
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .project-card {
    padding: var(--space-6);
  }

  /* Tech Stack Mobile */
  .tech-categories {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .tech-tags {
    justify-content: center;
  }

  /* Contributions Grid Mobile */
  .contributions-grid {
    grid-template-columns: 1fr;
  }

  /* Awards Grid Mobile */
  .awards-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .achievement-summary {
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-6);
  }

  .achievement-item {
    justify-content: center;
    text-align: center;
  }

  /* Writing Grid Mobile */
  .writing-grid {
    grid-template-columns: 1fr;
  }

  /* Contact Section Mobile */
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .contact-item {
    padding: var(--space-5);
  }

  .availability-card {
    padding: var(--space-6);
  }

  .contact-actions {
    flex-direction: column;
  }

  .contact-actions .btn {
    width: 100%;
  }

  /* Hide particles on mobile */
  .particles-container {
    display: none;
  }

  /* Footer Mobile */
  .footer {
    padding: var(--space-12) var(--space-6);
  }

  .footer-quote {
    font-size: var(--text-base);
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* ============================================
   Utilities
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-8 { margin-top: var(--space-8); }
.mt-16 { margin-top: var(--space-16); }

.hidden { display: none; }

/* ============================================
   Modern Bento Grid Layout - Professional Design
   ============================================ */

/* Hero Background */
.hero-background {
  position: absolute;
  inset: 0;
  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: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: min(1200px, 95vw);
  margin: 0 auto;
  padding: var(--space-12) var(--space-4);
}

/* Hero Header */
.hero-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.75rem, 8vw, 4.5rem);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.hero-description {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* Bento Grid Layout */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(160px, auto);
  gap: var(--bento-grid-gap);
  max-width: 1000px;
  margin: var(--space-10) auto;
  padding: 0 var(--space-4);
}

.bento-item {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-5);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.bento-item:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

/* Bento Size Variants */
.bento-large {
  grid-column: span 2;
  grid-row: span 2;
}

.bento-wide {
  grid-column: span 2;
}

.bento-tall {
  grid-row: span 2;
}

/* Bento Content Styles */
.bento-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.bento-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.bento-icon {
  font-size: var(--text-2xl);
  line-height: 1;
}

.bento-header h4 {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.bento-body {
  position: relative;
  z-index: 1;
  flex: 1;
}

/* Avatar Section */
.avatar-section {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  object-fit: cover;
}

.status-badge {
  padding: var(--space-1) var(--space-3);
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
}

/* Profile Info */
.profile-info h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.profile-info .role {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.profile-info .location {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.profile-info .bio {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  text-align: left;
}

.profile-info {
  text-align: left;
}

/* Skill List */
.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.skill-name {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.skill-bar {
  height: 4px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0;
}

/* Project Preview */
.project-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.project-mini {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  min-height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-tertiary);
  transition: background var(--transition-base);
  cursor: pointer;
}

.project-mini:hover {
  background: var(--color-border);
}

.project-icon {
  font-size: var(--text-2xl);
  flex-shrink: 0;
}

.project-info {
  flex: 1;
}

.project-info h5 {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-0_5);
}

.project-info p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.project-stat {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* Stat Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Social Links */
.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.social-link {
  padding: var(--space-3) var(--space-4);
  min-height: 44px;
  min-width: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.social-link:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Tech Tags */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.tech-tag:hover {
  background: var(--color-bg);
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* Status Info */
.status-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.status-text {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-success);
}

.status-location {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 900px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .bento-large {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }

  .bento-large,
  .bento-wide,
  .bento-tall {
    grid-column: span 1;
    grid-row: span 1;
  }

  .hero-container {
    padding: var(--space-8) var(--space-4);
  }

  .hero-title {
    font-size: clamp(2rem, 10vw, 2.5rem);
  }

  .avatar {
    width: 60px;
    height: 60px;
  }

  .avatar-section {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .stat-grid {
    gap: var(--space-3);
  }
}

/* ============================================
   Impact Dashboard - Modern Professional
   ============================================ */

.impact-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-5);
  max-width: 1000px;
  margin: 0 auto;
}

.impact-metric {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-6);
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.impact-metric:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.metric-icon {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-left: auto;
  margin-right: auto;
  border-radius: var(--radius-xl);
  background: var(--color-primary-alpha-10);
}

.metric-value {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-accent-cyan);
  margin-bottom: var(--space-2);
  display: block;
}

.metric-label {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.metric-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Impact metric color variants - row-based icon theming for 3x3 grid */

/* Matching icon backgrounds per row */
.impact-metric:nth-child(-n+3) .metric-icon {
  background: var(--color-primary-alpha-10);
}

.impact-metric:nth-child(n+4):nth-child(-n+6) .metric-icon {
  background: rgba(16, 185, 129, 0.1);
}

.impact-metric:nth-child(n+7) .metric-icon {
  background: rgba(245, 158, 11, 0.1);
}


@media (max-width: 640px) {
  .impact-dashboard {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .impact-metric {
    padding: var(--space-4);
  }

  .metric-value {
    font-size: var(--text-2xl);
  }
}

/* ============================================
   HR Quick Facts - Modern Style
   ============================================ */

.hr-quick-facts-container {
  max-width: 900px;
  margin: 0 auto var(--space-10);
}

.hr-quick-facts {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: var(--space-6);
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-4);
}

.quick-fact-item {
  text-align: center;
  flex: 1;
}

.quick-fact-value {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.quick-fact-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.quick-fact-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

.hr-secondary-facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.fact-badge {
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .hr-quick-facts {
    flex-direction: column;
    gap: var(--space-4);
  }

  .quick-fact-divider {
    width: 40px;
    height: 1px;
  }
}

/* ============================================
   Gallery Section - 图片相册
   ============================================ */

.gallery-section {
  padding: var(--section-spacing) 0;
  position: relative;
}

/* Gallery Filter */
.gallery-filter {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-3) var(--space-5);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.filter-btn:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-primary);
  color: var(--color-text);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
  column-gap: var(--space-4);
  row-gap: var(--space-4);
}

.gallery-item {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  background: var(--color-bg-secondary);
  transition: all var(--transition-normal);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item.hidden {
  display: none;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  position: relative;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: white;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
}

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

/* Responsive */
@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--space-2);
  }

  .gallery-filter {
    gap: var(--space-2);
  }

  .filter-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
}