/* =============================================================================
   Dr. UK - Spacetime Hacker Theme
   Dark futuristic design bridging quantum physics & data engineering
   ============================================================================= */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- CSS Variables --- */
:root {
  --bg:         #030a1a;
  --bg2:        #060f20;
  --surface:    #0a1628;
  --surface2:   #0d1e38;
  --border:     #132040;
  --border2:    #1e3560;
  --border3:    #2a4a80;

  --cyan:       #00d4ff;
  --cyan2:      #00a8cc;
  --cyan3:      #004466;
  --violet:     #8b5cf6;
  --violet2:    #6d28d9;
  --emerald:    #10b981;
  --gold:       #f59e0b;
  --red:        #ef4444;

  --text:       #e2e8f0;
  --text2:      #94a3b8;
  --text3:      #64748b;

  --nav-height: 64px;
  --radius:     8px;
  --radius-lg:  16px;
  --transition: 0.25s ease;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.4);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.5);
  --shadow-lg:  0 24px 64px rgba(0,0,0,0.6);
  --glow-cyan:  0 0 20px rgba(0,212,255,0.25), 0 0 60px rgba(0,212,255,0.1);
  --glow-violet:0 0 20px rgba(139,92,246,0.25), 0 0 60px rgba(139,92,246,0.1);
}

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

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Override Beautiful Jekyll body */
body.page-blog,
body.page-post,
body.page-page { background-color: var(--bg) !important; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p { margin-bottom: 1.25rem; color: var(--text); }

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #fff; text-decoration: none; }

strong, b { color: var(--text); font-weight: 600; }
em, i { color: var(--text2); }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

blockquote {
  border-left: 3px solid var(--cyan);
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
  color: var(--text2);
  font-style: italic;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan3); }

/* =============================================================================
   NAVIGATION
   ============================================================================= */

.navbar-custom {
  background: rgba(3, 10, 26, 0.8) !important;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
  padding: 0 2rem;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar-custom.scrolled {
  background: rgba(3, 10, 26, 0.96) !important;
  box-shadow: 0 2px 24px rgba(0,0,0,0.6), 0 1px 0 var(--border);
}

/* Brand */
.navbar-brand {
  font-family: var(--font-display) !important;
  font-size: 1.25rem !important;
  font-weight: 700 !important;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  padding: 0 !important;
}

/* Nav links */
.navbar-custom .nav-item .nav-link {
  color: var(--text2) !important;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.5rem 1rem !important;
  transition: color var(--transition);
  position: relative;
}

.navbar-custom .nav-item .nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 1rem;
  right: 1rem;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.navbar-custom .nav-item .nav-link:hover,
.navbar-custom .nav-item .nav-link:focus {
  color: var(--cyan) !important;
}

.navbar-custom .nav-item .nav-link:hover::after {
  transform: scaleX(1);
}

/* Avatar in nav */
.avatar-container { display: none; }

/* Navbar toggler */
.navbar-toggler {
  border-color: var(--border) !important;
  color: var(--text2) !important;
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(148, 163, 184, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

/* Search */
#nav-search-icon { color: var(--text2); }
#nav-search-link:hover #nav-search-icon { color: var(--cyan); }

/* Dropdown */
.dropdown-menu {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.dropdown-item {
  color: var(--text2);
  font-family: var(--font-body);
  font-size: 0.875rem;
}
.dropdown-item:hover {
  background: var(--border);
  color: var(--cyan);
}

/* Dark mode toggle */
#dark-mode-toggle {
  background: none;
  border: 1px solid var(--border2);
  border-radius: 20px;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.875rem;
  padding: 0.25rem 0.75rem;
  margin-left: 0.5rem;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
#dark-mode-toggle:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* =============================================================================
   HERO SECTION
   ============================================================================= */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg);
}

#particles-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Radial glow in hero */
.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  right: 10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139,92,246,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 10%;
  left: 5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,212,255,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 6rem 2rem 4rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: center;
}

.hero-text { max-width: 640px; }

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 0.8s forwards 0.2s;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #fff 0%, var(--cyan) 50%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: fadeInUp 0.8s forwards 0.4s;
}

.hero-typewriter {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text2);
  margin-bottom: 1.5rem;
  min-height: 2.2rem;
  opacity: 0;
  animation: fadeInUp 0.8s forwards 0.6s;
}

.typewriter-highlight {
  color: var(--cyan);
  font-weight: 600;
}

.typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--cyan);
  margin-left: 2px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

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

.hero-bio {
  color: var(--text2);
  font-size: 1rem;
  margin-bottom: 2rem;
  line-height: 1.6;
  opacity: 0;
  animation: fadeInUp 0.8s forwards 0.8s;
}

.hero-bio a {
  color: var(--text2);
  border-bottom: 1px solid var(--border2);
  transition: all var(--transition);
}
.hero-bio a:hover { color: var(--cyan); border-color: var(--cyan); }

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 0.8s forwards 0.9s;
}

.hero-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--border2);
  color: var(--text2);
  background: rgba(10,22,40,0.6);
  letter-spacing: 0.05em;
}

.hero-badge.cyan { border-color: rgba(0,212,255,0.4); color: var(--cyan); background: rgba(0,212,255,0.08); }
.hero-badge.violet { border-color: rgba(139,92,246,0.4); color: var(--violet); background: rgba(139,92,246,0.08); }
.hero-badge.emerald { border-color: rgba(16,185,129,0.4); color: var(--emerald); background: rgba(16,185,129,0.08); }

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  animation: fadeInUp 0.8s forwards 1s;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.75rem;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  color: #fff !important;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  opacity: 0;
  transition: opacity 0.3s;
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,212,255,0.3);
  color: #fff !important;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.75rem;
  background: transparent;
  color: var(--text) !important;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--border2);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan) !important;
  background: rgba(0,212,255,0.06);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.25rem;
  color: var(--text2) !important;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.btn-ghost:hover { color: var(--cyan) !important; }

/* Hero photo */
.hero-photo {
  opacity: 0;
  animation: fadeIn 1s forwards 0.6s;
}

.hero-photo-wrapper {
  width: 280px;
  height: 280px;
  position: relative;
}

.hero-photo-wrapper::before {
  content: '';
  position: absolute;
  inset: -3px;
  background: linear-gradient(135deg, var(--cyan), var(--violet), var(--cyan));
  border-radius: 50%;
  animation: rotateBorder 6s linear infinite;
  z-index: -1;
}

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

.hero-photo-wrapper::after {
  content: '';
  position: absolute;
  inset: -20px;
  background: radial-gradient(circle, rgba(0,212,255,0.12) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -2;
}

.hero-photo-wrapper img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--bg);
  position: relative;
  z-index: 1;
}

/* Hero GIF */
.hero-gif-wrapper {
  margin-top: 1.5rem;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(0,212,255,0.2);
  box-shadow: 0 0 24px rgba(0,212,255,0.1);
  max-width: 280px;
}

.hero-gif {
  width: 100%;
  height: auto;
  display: block;
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  opacity: 0;
  animation: fadeIn 1s forwards 1.5s;
}

.scroll-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text3);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-arrow::after {
  content: '';
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--border3), transparent);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* Hero stats */
.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2rem;
  opacity: 0;
  animation: fadeInUp 0.8s forwards 1.1s;
}

.stat-item { text-align: left; }
.stat-number {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text3);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

/* =============================================================================
   SECTION STYLES
   ============================================================================= */

.section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-sm { padding: 3rem 2rem; }

.section-header {
  margin-bottom: 3rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::before {
  content: '//';
  color: var(--border3);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.section-desc {
  color: var(--text2);
  font-size: 1.05rem;
  max-width: 600px;
}

/* Divider */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border2), transparent);
  margin: 0;
}

/* =============================================================================
   WHAT I DO CARDS
   ============================================================================= */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.glass-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border3), transparent);
  transition: background 0.3s;
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--border2);
  box-shadow: var(--shadow-md);
}

.glass-card.cyan-glow:hover {
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 8px 40px rgba(0,212,255,0.1);
}
.glass-card.violet-glow:hover {
  border-color: rgba(139,92,246,0.3);
  box-shadow: 0 8px 40px rgba(139,92,246,0.1);
}
.glass-card.emerald-glow:hover {
  border-color: rgba(16,185,129,0.3);
  box-shadow: 0 8px 40px rgba(16,185,129,0.1);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}
.card-icon.cyan { background: rgba(0,212,255,0.1); color: var(--cyan); }
.card-icon.violet { background: rgba(139,92,246,0.1); color: var(--violet); }
.card-icon.emerald { background: rgba(16,185,129,0.1); color: var(--emerald); }
.card-icon.gold { background: rgba(245,158,11,0.1); color: var(--gold); }

.card-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.card-body { color: var(--text2); font-size: 0.925rem; line-height: 1.7; }

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.25rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border2);
  color: var(--text3);
  background: var(--bg2);
  letter-spacing: 0.03em;
}

.tag.cyan { border-color: rgba(0,212,255,0.25); color: var(--cyan2); }
.tag.violet { border-color: rgba(139,92,246,0.25); color: #a78bfa; }
.tag.emerald { border-color: rgba(16,185,129,0.25); color: var(--emerald); }

/* =============================================================================
   TECH STACK
   ============================================================================= */

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tech-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text2);
  transition: all var(--transition);
}

.tech-badge:hover {
  border-color: var(--border3);
  color: var(--text);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.tech-badge i { font-size: 1rem; }

/* =============================================================================
   POST CARDS (Blog Feed)
   ============================================================================= */

.posts-list { list-style: none; padding: 0; }

.post-preview {
  margin-bottom: 1.5rem;
}

.post-card {
  display: grid;
  grid-template-columns: 1fr;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.post-card:hover {
  border-color: var(--border2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.post-card-body { padding: 1.75rem; }

.post-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text3);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.post-title {
  font-family: var(--font-display) !important;
  font-size: 1.2rem !important;
  font-weight: 600 !important;
  color: var(--text) !important;
  line-height: 1.3 !important;
  margin-bottom: 0.75rem !important;
  transition: color var(--transition);
}

.post-title a { color: inherit !important; }
.post-card:hover .post-title { color: var(--cyan) !important; }
.post-card:hover .post-title a { color: var(--cyan) !important; }

.post-subtitle {
  font-size: 0.95rem !important;
  color: var(--text2) !important;
  font-weight: 400 !important;
  margin-bottom: 0.75rem !important;
}

.post-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text3);
  margin-bottom: 1rem;
}

.post-entry {
  color: var(--text2);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.post-read-more {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan) !important;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}
.post-read-more:hover { border-color: var(--cyan); }

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  font-size: 0.8rem;
}

.blog-tags span { color: var(--text3); }
.blog-tags a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text3);
  transition: all var(--transition);
}
.blog-tags a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0,212,255,0.06);
}

/* =============================================================================
   POST / ARTICLE LAYOUT
   ============================================================================= */

.blog-post {
  color: var(--text);
  line-height: 1.8;
  font-size: 1.05rem;
}

.blog-post h1, .blog-post h2, .blog-post h3,
.blog-post h4, .blog-post h5, .blog-post h6 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.blog-post h2 {
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.blog-post p { margin-bottom: 1.25rem; }

.blog-post img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin: 1.5rem auto;
  display: block;
}

.blog-post table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.blog-post table th {
  background: var(--surface2);
  color: var(--text2);
  font-family: var(--font-display);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border2);
}

.blog-post table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text2);
  vertical-align: top;
}

.blog-post table td img {
  margin: 0.5rem auto;
  border-radius: var(--radius);
}

.blog-post table tr:hover td { background: var(--surface); }

/* Inline code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--surface2);
  color: var(--cyan);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Code blocks */
pre {
  background: #0d1117 !important;
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  position: relative;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: #e6edf3;
  font-size: 0.875rem;
  line-height: 1.6;
}

/* Syntax highlighting overrides */
.highlight {
  background: #0d1117 !important;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  margin: 1.5rem 0;
}

.highlight pre {
  background: transparent !important;
  border: none;
  margin: 0;
}

/* MathJax overrides */
.MJXc-display,
.MathJax_Display,
mjx-container[display="true"] {
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius) !important;
  padding: 1.5rem !important;
  margin: 1.5rem 0 !important;
  overflow-x: auto !important;
  color: var(--text) !important;
}

mjx-container svg { color: var(--text) !important; fill: var(--text) !important; }
.mjx-chtml { color: var(--text) !important; }

/* =============================================================================
   PAGE HEADER (non-hero pages)
   ============================================================================= */

.page-header-section {
  background: linear-gradient(180deg, var(--bg2) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  padding: calc(var(--nav-height) + 3rem) 2rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,212,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.page-heading h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--text) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}

.page-heading .page-subheading {
  color: var(--text2);
  font-size: 1.1rem;
  display: block;
}

.post-heading h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.post-heading h2 {
  color: var(--text2);
  font-size: 1.1rem;
  font-weight: 400;
  border: none;
  padding: 0;
  margin: 0 0 1rem;
}

.post-meta-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

.post-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text3);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.post-meta svg { opacity: 0.6; }

/* =============================================================================
   COVER IMAGE HEADER
   ============================================================================= */

.intro-header {
  background: var(--bg2);
}

.intro-header.no-img {
  background: linear-gradient(180deg, var(--bg2) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  padding: calc(var(--nav-height) + 3rem) 2rem 3rem;
  text-align: center;
  position: relative;
}

.intro-header.no-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,212,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.intro-header.big-img {
  background-size: cover;
  background-position: center;
  padding: calc(var(--nav-height) + 4rem) 2rem 4rem;
  position: relative;
}

.intro-header.big-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(3,10,26,0.7) 0%, rgba(3,10,26,0.5) 100%);
}

/* =============================================================================
   PAGINATION
   ============================================================================= */

.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin: 3rem 0 1rem;
  list-style: none;
  padding: 0;
}

.page-item .page-link {
  display: flex;
  align-items: center;
  padding: 0.5rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text2) !important;
  font-family: var(--font-display);
  font-size: 0.875rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.page-item .page-link:hover {
  background: var(--surface2);
  border-color: var(--cyan);
  color: var(--cyan) !important;
}

.blog-pager { justify-content: space-between; }
.blog-pager .previous { margin-right: auto; }
.blog-pager .next { margin-left: auto; }

/* =============================================================================
   CV LAYOUT
   ============================================================================= */

/* CV heading overrides */
.cv-page h1 {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  margin: 2.5rem 0 1.5rem;
}

.cv-page h1:first-child { margin-top: 0; }

.cv-page h3 {
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.25rem;
}

/* Date badges in CV */
.cv-page strong + br + em,
.cv-page p:has(strong) {
  color: var(--cyan);
}

/* CV sections */
.cv-page h1#summary + p {
  color: var(--text2);
  line-height: 1.8;
  font-size: 1rem;
}

/* Skills list */
.cv-page h1#skills ~ ul {
  list-style: none;
  padding: 0;
}

.cv-page h1#skills ~ ul > li {
  margin-bottom: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cv-page h1#skills ~ ul > li > strong:first-child {
  display: block;
  font-family: var(--font-display);
  color: var(--cyan);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

/* Publication links */
.cv-page a {
  color: var(--cyan) !important;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}
.cv-page a:hover { border-color: var(--cyan); color: #fff !important; }

/* =============================================================================
   FOOTER
   ============================================================================= */

footer {
  background: var(--bg2) !important;
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  margin-top: 0;
}

.beautiful-jekyll-footer {
  text-align: center;
}

.footer-links {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.footer-links .fa-stack {
  color: var(--text3);
  transition: color var(--transition), transform var(--transition);
}

.footer-links a:hover .fa-stack {
  color: var(--cyan);
  transform: translateY(-3px) scale(1.1);
}

.footer-links .fa-circle { color: var(--surface2) !important; }
.footer-links .fa-inverse { color: var(--text2) !important; }

.footer-links a:hover .fa-circle { color: rgba(0,212,255,0.15) !important; }
.footer-links a:hover .fa-inverse { color: var(--cyan) !important; }

.copyright {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text3) !important;
  margin: 0;
}

.copyright a {
  color: var(--text3) !important;
  transition: color var(--transition);
}
.copyright a:hover { color: var(--cyan) !important; }

/* =============================================================================
   ABOUT PAGE LAYOUT
   ============================================================================= */

.about-intro img {
  border-radius: 50%;
  border: 3px solid var(--border2);
  box-shadow: 0 0 40px rgba(0,212,255,0.1);
}

/* =============================================================================
   PUBLICATIONS
   ============================================================================= */

.publication-item {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  border-left: 3px solid var(--violet);
  transition: all var(--transition);
}

.publication-item:hover {
  border-color: var(--border2);
  border-left-color: var(--cyan);
  transform: translateX(4px);
}

/* =============================================================================
   SEARCH
   ============================================================================= */

#nav-search-box {
  background: var(--surface);
  border: 1px solid var(--border2);
  color: var(--text);
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  width: 100%;
  transition: all var(--transition);
}

#nav-search-box:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
  outline: none;
}

#nav-search-box::placeholder { color: var(--text3); }

#search-results-container {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

/* =============================================================================
   RESPONSIVE
   ============================================================================= */

@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: calc(var(--nav-height) + 3rem);
  }

  .hero-text { max-width: none; }

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

  .hero-badges, .hero-ctas, .hero-stats {
    justify-content: center;
  }

  .hero-stats {
    gap: 2rem;
  }

  .hero-photo {
    display: flex;
    justify-content: center;
    order: -1;
  }

  .hero-photo-wrapper {
    width: 200px;
    height: 200px;
  }

  .section-label { justify-content: center; }
  .section-desc { max-width: none; }
}

@media (max-width: 768px) {
  .hero-stats {
    flex-direction: row;
    gap: 1.5rem;
  }

  .navbar-custom { padding: 0 1rem; }

  .section { padding: 3rem 1.5rem; }

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

  .hero-photo-wrapper {
    width: 160px;
    height: 160px;
  }
}

/* ═══════════════════════════════════════════════
   PROJECTS PAGE
═══════════════════════════════════════════════ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2rem 0;
}

.filter-btn {
  padding: 0.4rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(0,212,255,0.25);
  background: transparent;
  color: var(--text2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  background: rgba(0,212,255,0.12);
  border-color: var(--cyan);
  color: var(--cyan);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}

.project-card:hover {
  border-color: rgba(0,212,255,0.35);
  box-shadow: 0 0 24px rgba(0,212,255,0.08);
  transform: translateY(-3px);
}

.project-card-category {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.project-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.project-card-title a {
  color: var(--text1);
  text-decoration: none;
}

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

.project-card-description {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1rem;
}

.project-card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: rgba(139,92,246,0.12);
  border: 1px solid rgba(139,92,246,0.25);
  color: var(--violet);
}

/* =============================================================================
   ANIMATIONS
   ============================================================================= */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

/* Scroll animation classes */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  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; }

/* =============================================================================
   MISC / OVERRIDES
   ============================================================================= */

/* Bootstrap overrides */
.container-md, .container-fluid {
  background: transparent !important;
}

.row { margin: 0 -0.75rem; }

/* Page body padding */
body:not(.has-hero) main {
  padding-top: var(--nav-height);
}

/* Images with captions (Beautiful Jekyll table trick) */
.blog-post table {
  background: transparent;
  border: none;
}

.blog-post table td {
  background: transparent;
  border: none;
  text-align: center;
}

.blog-post table td em {
  font-size: 0.85rem;
  color: var(--text3);
  font-style: italic;
}

/* Lists */
.blog-post ul, .blog-post ol {
  padding-left: 1.75rem;
  margin-bottom: 1.25rem;
  color: var(--text2);
}

.blog-post ul li, .blog-post ol li { margin-bottom: 0.4rem; }

/* Skip link */
.sr-only-focusable:focus {
  position: fixed !important;
  top: 1rem !important;
  left: 1rem !important;
  z-index: 9999;
  clip: auto !important;
  background: var(--cyan);
  color: var(--bg);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
}

/* Highlight rows on CV */
.cv-page ul { padding-left: 1.25rem; }
.cv-page ul li { margin-bottom: 0.4rem; color: var(--text2); }

/* Social share buttons */
.sharer-buttons a {
  border: 1px solid var(--border) !important;
  border-radius: 4px !important;
  background: var(--surface) !important;
  transition: all var(--transition) !important;
}
.sharer-buttons a:hover { border-color: var(--cyan) !important; }

/* =============================================================================
   FEATURED RECENT POSTS (homepage)
   ============================================================================= */

.home-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.home-post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.home-post-card:hover {
  transform: translateY(-4px);
  border-color: var(--border2);
  box-shadow: var(--shadow-md);
}

.home-post-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.home-post-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.home-post-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.75rem;
  flex: 1;
  transition: color var(--transition);
}

.home-post-card:hover .home-post-title { color: var(--cyan); }

.home-post-excerpt {
  font-size: 0.875rem;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.home-post-read-more {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap var(--transition);
}
.home-post-card:hover .home-post-read-more { gap: 0.6rem; }

/* =============================================================================
   ABOUT SECTION (homepage)
   ============================================================================= */

.about-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: start;
}

.about-photo-home {
  width: 180px;
  height: 180px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--border2);
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.about-text-home h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1rem;
}

.about-text-home p {
  color: var(--text2);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .about-photo-home {
    margin: 0 auto;
    display: block;
  }
}

/* =============================================================================
   LINK UTILITY
   ============================================================================= */

.view-all-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--cyan);
  transition: gap var(--transition);
}
.view-all-link:hover { color: var(--cyan); gap: 0.7rem; }

/* Full page main content area */
#main-content { min-height: calc(100vh - var(--nav-height) - 200px); }

/* =============================================================================
   LIGHT MODE (user preference)
   ============================================================================= */

body.light-mode {
  --bg:      #f8fafc;
  --bg2:     #f1f5f9;
  --surface: #ffffff;
  --surface2:#f8fafc;
  --border:  #e2e8f0;
  --border2: #cbd5e1;
  --border3: #94a3b8;
  --text:    #0f172a;
  --text2:   #334155;
  --text3:   #64748b;
  --cyan:    #0284c7;
  --cyan2:   #0369a1;
  --violet:  #7c3aed;
  --emerald: #059669;
}

body.light-mode .navbar-custom {
  background: rgba(248,250,252,0.9) !important;
  border-color: var(--border);
}

body.light-mode .hero {
  background: var(--bg2);
}

body.light-mode .hero-name {
  background: linear-gradient(135deg, #0f172a 0%, #0284c7 50%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.light-mode pre { background: #1e293b !important; }
body.light-mode code { background: #f1f5f9; color: #0284c7; border-color: #e2e8f0; }

/* =============================================================================
   BEAUTIFUL JEKYLL COMPATIBILITY
   ============================================================================= */

/* These override the old Beautiful Jekyll styles we don't want */
.top-nav-regular, .top-nav-short-permanent { top: 0 !important; }

.page-content { padding: 0 !important; background: transparent !important; }

#header-big-imgs { display: none; }

/* Fix fixed navbar offset for content */
.intro-header.no-img {
  padding-top: calc(var(--nav-height) + 3rem) !important;
}

/* Remove old Beautiful Jekyll backgrounds */
.intro-header { background: transparent; }