/* Modern Glassmorphism Portfolio - Design System */
/* ================================================ */

/* CSS Custom Properties */
:root {
  /* Colors - Dark Theme (Default) */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a25;

  /* Gradient Colors */
  --gradient-1: #667eea;
  --gradient-2: #764ba2;
  --gradient-3: #f093fb;
  --gradient-4: #f5576c;
  --gradient-5: #4facfe;
  --gradient-6: #00f2fe;

  /* Accent Colors */
  --color-accent-primary: #64f4ac;
  --color-accent-secondary: #667eea;
  --color-accent-tertiary: #f093fb;

  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.8);
  --color-text-tertiary: rgba(255, 255, 255, 0.6);
  --color-text-muted: rgba(255, 255, 255, 0.4);

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-blur: blur(20px);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Quicksand', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Sizing */
  --container-max: 1200px;
  --section-padding: 100px;
  --card-radius: 24px;
  --button-radius: 12px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Light Theme */
[data-theme="light"] {
  --color-bg-primary: #f5f7fa;
  --color-bg-secondary: #ffffff;
  --color-bg-tertiary: #eef1f5;

  --color-text-primary: #1a1a2e;
  --color-text-secondary: rgba(26, 26, 46, 0.75);
  --color-text-tertiary: rgba(26, 26, 46, 0.55);
  --color-text-muted: rgba(26, 26, 46, 0.45);

  /* Light theme glass - use subtle shadow instead of white border */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);

  --color-accent-primary: #5c6bc0;
  --color-accent-secondary: #7c4dff;
  --color-accent-tertiary: #e040fb;

  /* Gradient orbs - more subtle in light mode */
  --gradient-1: #667eea;
  --gradient-2: #764ba2;
  --gradient-3: #f093fb;
  --gradient-4: #f5576c;
  --gradient-5: #4facfe;
  --gradient-6: #00f2fe;
}

/* Light theme specific overrides */
[data-theme="light"] .bg-gradient-orb {
  opacity: 0.25;
}

[data-theme="light"] .glass-card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .btn-primary {
  color: #ffffff;
}

[data-theme="light"] .btn-primary:hover {
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(92, 107, 192, 0.4);
}

[data-theme="light"] .hero-avatar {
  box-shadow: 0 0 60px rgba(92, 107, 192, 0.25);
}

[data-theme="light"] .stat-number {
  background: linear-gradient(135deg, #5c6bc0, #7c4dff);
  -webkit-background-clip: text;
  background-clip: text;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-accent-secondary);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

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

.bg-gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: float 20s ease-in-out infinite;
}

.bg-gradient-orb:nth-child(1) {
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  top: -200px;
  left: -200px;
  animation-delay: 0s;
}

.bg-gradient-orb:nth-child(2) {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, var(--gradient-3), var(--gradient-4));
  top: 50%;
  right: -150px;
  animation-delay: -5s;
}

.bg-gradient-orb:nth-child(3) {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, var(--gradient-5), var(--gradient-6));
  bottom: -100px;
  left: 30%;
  animation-delay: -10s;
}

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

/* Glass Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  box-shadow: var(--glass-shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  /* Prevent backdrop-filter bleed and create stacking context */
  isolation: isolate;
  overflow: hidden;
}

.glass-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-normal);
}

.nav.scrolled {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  padding: 12px 0;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 8px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
  transition: width var(--transition-normal);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme Toggle */
.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  border-color: var(--color-accent-primary);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background var(--transition-fast);
}

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

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition-normal);
  transform-origin: center;
}

/* Hamburger to X animation */
.nav-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 80px;
  align-items: center;
}

.hero-text {
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  font-size: 0.875rem;
  color: var(--color-accent-primary);
  margin-bottom: 24px;
  backdrop-filter: var(--glass-blur);
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-accent-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero-title {
  margin-bottom: 24px;
  line-height: 1.1;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary), var(--color-accent-tertiary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradient-shift 5s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
}

.hero-avatar {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--glass-border);
  box-shadow: 0 0 60px rgba(100, 244, 172, 0.3);
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-avatar::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary), var(--color-accent-tertiary));
  z-index: -1;
  animation: rotate 10s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.stat-item {
  text-align: center;
  padding: 24px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--button-radius);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: var(--color-bg-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(100, 244, 172, 0.4);
  color: var(--color-bg-primary);
}

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

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

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 12px;
}

/* Section */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.section-title {
  margin-bottom: 16px;
}

.section-description {
  color: var(--color-text-tertiary);
  font-size: 1.125rem;
}

/* Experience Cards */
.experience-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.experience-card {
  padding: 32px;
  position: relative;
  overflow: hidden;
}

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

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.experience-company {
  font-size: 0.875rem;
  color: var(--color-accent-primary);
  font-weight: 600;
  margin-bottom: 4px;
}

.experience-role {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0;
}

.experience-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: var(--glass-bg);
  padding: 6px 12px;
  border-radius: 100px;
}

.experience-description {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.experience-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 0.75rem;
  padding: 4px 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  color: var(--color-text-tertiary);
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.skill-card {
  padding: 32px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.skill-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.skill-card h4 {
  margin-bottom: 8px;
  font-size: 1.125rem;
}

.skill-card p {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

/* Expertise Number Cards */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.expertise-card {
  padding: 32px 24px;
  padding-top: 48px;
  text-align: center;
  position: relative;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.expertise-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.15;
  position: absolute;
  top: -8px;
  right: 16px;
  line-height: 1;
  pointer-events: none;
  z-index: 0;
}

.expertise-card h4 {
  font-size: 1.125rem;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.expertise-card p {
  font-size: 0.9rem;
  color: var(--color-text-tertiary);
  margin-bottom: 0;
  position: relative;
  z-index: 1;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent-primary), var(--color-accent-secondary), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: 48px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -40px;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--color-accent-primary);
  border-radius: 50%;
  border: 4px solid var(--color-bg-primary);
  box-shadow: 0 0 0 4px var(--glass-border);
}

.timeline-content {
  padding: 24px;
}

.timeline-date {
  font-size: 0.875rem;
  color: var(--color-accent-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.timeline-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.timeline-description {
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

/* Blog Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.blog-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.blog-image {
  aspect-ratio: 16/10;
  overflow: hidden;
  border-radius: var(--card-radius) var(--card-radius) 0 0;
}

.blog-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.blog-card:hover .blog-image img {
  transform: scale(1.05);
}

.blog-content {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-category {
  font-size: 0.75rem;
  color: var(--color-accent-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.blog-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  line-height: 1.4;
}

.blog-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-tertiary);
  margin-bottom: 16px;
  flex: 1;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-info h3 {
  font-size: 2rem;
  margin-bottom: 24px;
}

.contact-info p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--button-radius);
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
}

.contact-link:hover {
  background: var(--glass-bg);
  color: var(--color-accent-primary);
}

.contact-link i {
  font-size: 1.25rem;
  width: 24px;
}

.contact-link span {
  font-size: 1rem;
}

.contact-social {
  display: flex;
  gap: 16px;
  margin-top: 32px;
}

.social-link {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
}

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

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
}

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

/* Scroll Reveal Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Responsive Design */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .hero-image {
    order: -1;
    max-width: 300px;
    margin: 0 auto;
  }

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

  .experience-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .expertise-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
    --card-radius: 16px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stat-item {
    padding: 16px;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .expertise-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .expertise-card {
    min-height: auto;
    padding: 24px 20px;
    padding-top: 40px;
  }

  .expertise-number {
    font-size: 3rem;
    top: -4px;
    right: 12px;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .container {
    padding: 0 16px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .experience-card {
    padding: 24px;
  }

  .hero-image {
    max-width: 250px;
  }
}

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

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.preloader-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--color-accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Utilities */
.text-gradient {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }

/* Blog Page Styles */
.blog-hero {
  padding: 160px 0 80px;
  text-align: center;
}

.blog-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.blog-list-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 24px;
  align-items: center;
}

.blog-list-item:hover {
  background: var(--glass-bg);
}

.blog-list-date {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.blog-list-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.blog-list-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

/* Post Page Styles */
.post-hero {
  padding: 160px 0 60px;
  text-align: center;
}

.post-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.post-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

.post-content h2 {
  margin-top: 48px;
  margin-bottom: 24px;
}

.post-content h3 {
  margin-top: 32px;
  margin-bottom: 16px;
}

.post-content p {
  margin-bottom: 24px;
  line-height: 1.8;
}

.post-content ul, .post-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.post-content li {
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

.post-content code {
  font-family: var(--font-mono);
  background: var(--glass-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-content pre {
  background: var(--color-bg-tertiary);
  padding: 24px;
  border-radius: 12px;
  overflow-x: auto;
  margin-bottom: 24px;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content blockquote {
  border-left: 4px solid var(--color-accent-primary);
  padding-left: 24px;
  margin: 32px 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.post-content img {
  max-width: 100%;
  border-radius: 12px;
  margin: 32px 0;
}

/* ================================================ */
/* Accessibility & Focus States                     */
/* ================================================ */

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
}

/* Remove outline for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* Button focus states */
.btn:focus-visible,
.theme-toggle:focus-visible,
.nav-toggle:focus-visible,
.social-link:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
}

/* Link focus states */
a:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Card focus states */
.glass-card:focus-visible,
.blog-card:focus-visible,
.contact-link:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
}

/* Skip to content link for screen readers */
.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  border-radius: var(--button-radius);
  font-weight: 600;
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .bg-gradient-orb {
    animation: none;
  }

  .hero-avatar::before {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Active nav link indicator */
.nav-links a.active {
  color: var(--color-accent-primary);
}

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

/* Better hover states for blog cards */
.blog-card {
  cursor: pointer;
}

.blog-card:hover .blog-title {
  color: var(--color-accent-primary);
}

.blog-card:hover .blog-category {
  color: var(--color-accent-secondary);
}

/* Improve experience card interaction */
.experience-card {
  cursor: default;
}

/* Stats card - remove hover effect since it's not interactive */
.hero-stats.glass-card:hover {
  transform: none;
  box-shadow: var(--glass-shadow);
}

/* Timeline dot pulse animation */
.timeline-dot {
  position: relative;
}

.timeline-dot::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--color-accent-primary);
  opacity: 0;
  animation: timeline-pulse 2s ease-out infinite;
}

@keyframes timeline-pulse {
  0% {
    transform: scale(1);
    opacity: 0.4;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* Contact link hover improvement */
.contact-link {
  border: 1px solid transparent;
}

.contact-link:hover {
  border-color: var(--glass-border);
}

/* Scroll indicator for hero */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  animation: bounce 2s infinite;
}

.scroll-indicator i {
  font-size: 1.25rem;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-8px);
  }
  60% {
    transform: translateX(-50%) translateY(-4px);
  }
}

/* Better tag hover states */
.tag {
  transition: all var(--transition-fast);
}

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

/* Improve skill icon visibility */
.skill-icon i {
  font-size: 2.5rem;
}

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

/* Smooth scrollbar (webkit) */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ================================================ */
/* 3D Effects & Advanced Animations                 */
/* ================================================ */

/* 3D Tilt effect on glass cards */
.glass-card {
  transform-style: preserve-3d;
  perspective: 1000px;
}

.glass-card.tilt-effect {
  transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
}

/* Glow effect on hover */
.glass-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(100, 244, 172, 0.1),
    transparent 40%
  );
}

.glass-card:hover::after {
  opacity: 1;
}

/* Floating animation for elements */
.float-animation {
  animation: float-gentle 6s ease-in-out infinite;
}

@keyframes float-gentle {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* Gradient text shimmer animation */
.gradient-text-animated {
  background: linear-gradient(
    90deg,
    var(--color-accent-primary),
    var(--color-accent-secondary),
    var(--color-accent-tertiary),
    var(--color-accent-primary)
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shimmer 8s ease infinite;
}

@keyframes gradient-shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Hero section 3D depth */
.hero-content {
  transform-style: preserve-3d;
}

.hero-text {
  transform: translateZ(0);
}

.hero-image {
  transform: translateZ(20px);
}

/* Stats counter animation */
.stat-number {
  display: inline-block;
}

.stat-number.counting {
  animation: count-pop 0.3s ease-out;
}

@keyframes count-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

/* Skill card icon hover effect */
.skill-card:hover .skill-icon {
  transform: scale(1.1) rotateY(10deg);
  transition: transform var(--transition-normal);
}

.skill-icon {
  transform-style: preserve-3d;
  transition: transform var(--transition-normal);
}

/* Experience card left border glow */
.experience-card::before {
  transition: box-shadow var(--transition-normal);
}

.experience-card:hover::before {
  box-shadow: 0 0 20px var(--color-accent-primary);
}

/* Blog card image zoom effect */
.blog-card .blog-image {
  overflow: hidden;
}

.blog-card .blog-image img {
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.blog-card:hover .blog-image img {
  transform: scale(1.08);
}

/* Staggered reveal animation */
.stagger-reveal > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-reveal.active > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-reveal.active > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-reveal.active > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-reveal.active > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-reveal.active > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-reveal.active > *:nth-child(6) { transition-delay: 0.6s; }

.stagger-reveal.active > * {
  opacity: 1;
  transform: translateY(0);
}

/* Magnetic button effect */
.btn-magnetic {
  transition: transform 0.2s ease-out;
}

/* Text typing cursor effect */
.typing-cursor::after {
  content: '|';
  animation: blink 1s infinite;
  margin-left: 2px;
  color: var(--color-accent-primary);
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Noise texture overlay for depth */
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Avatar glow pulse */
.hero-avatar {
  animation: avatar-glow 4s ease-in-out infinite;
}

@keyframes avatar-glow {
  0%, 100% { box-shadow: 0 0 40px rgba(100, 244, 172, 0.3); }
  50% { box-shadow: 0 0 60px rgba(100, 244, 172, 0.5), 0 0 80px rgba(102, 126, 234, 0.3); }
}

[data-theme="light"] .hero-avatar {
  animation: avatar-glow-light 4s ease-in-out infinite;
}

@keyframes avatar-glow-light {
  0%, 100% { box-shadow: 0 0 40px rgba(92, 107, 192, 0.2); }
  50% { box-shadow: 0 0 60px rgba(92, 107, 192, 0.35), 0 0 80px rgba(124, 77, 255, 0.2); }
}

/* Section divider gradient line */
.section-divider {
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-accent-primary),
    var(--color-accent-secondary),
    transparent
  );
  margin: var(--section-padding) auto;
  max-width: 200px;
  opacity: 0.5;
}

/* Interactive cursor glow (for supported browsers) */
@supports (background: paint(something)) {
  .interactive-glow {
    --glow-x: 50%;
    --glow-y: 50%;
    position: relative;
  }

  .interactive-glow::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    background: radial-gradient(
      400px circle at var(--glow-x) var(--glow-y),
      rgba(100, 244, 172, 0.15),
      transparent 40%
    );
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .interactive-glow:hover::before {
    opacity: 1;
  }
}

/* Smooth entrance for page load */
@keyframes page-enter {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-enter {
  animation: page-enter 0.6s ease-out forwards;
}

/* Button ripple effect */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn-ripple:active::before {
  width: 300px;
  height: 300px;
}