/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --bg-primary:    #060d06;
  --bg-secondary:  #080f08;
  --bg-card:       #0c160c;
  --bg-card-hover: #0f1c0f;
  --border-color:  rgba(255, 255, 255, 0.07);
  --border-accent: rgba(74, 222, 128, 0.25);
  --accent-cyan:   #4ade80;
  --accent-indigo: #22c55e;
  --accent-purple: #86efac;
  --accent-green:  #86efac;
  --text-primary:  #e2e8f0;
  --text-secondary:#94a3b8;
  --text-muted:    #475569;
  --gradient-brand: linear-gradient(135deg, #4ade80 0%, #86efac 100%);
  --shadow-sm:     0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-card:   0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover:  0 8px 40px rgba(74, 222, 128, 0.12);
  --font-body:     'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;
  --radius:        12px;
  --radius-sm:     8px;
  --transition:    0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================
   Base
   =========================== */
html { scroll-behavior: smooth; }

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

a { color: var(--accent-cyan); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-indigo); }
img { max-width: 100%; height: auto; }
code, pre { font-family: var(--font-mono); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-cyan); }

/* ===========================
   Utilities
   =========================== */
.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.divider-accent {
  width: 48px;
  height: 3px;
  background: var(--gradient-brand);
  border-radius: 2px;
  margin-bottom: 2.5rem;
}

.section-alt { background-color: var(--bg-secondary); }

/* Scroll-reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Navbar
   =========================== */
.navbar {
  background: transparent;
  padding: 1.25rem 0;
  transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(6, 13, 6, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border-color);
  padding: 0.75rem 0;
}
.navbar-brand {
  font-weight: 800;
  font-size: 1.25rem;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.navbar-nav .nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.45rem 0.9rem !important;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--text-primary) !important;
  background: rgba(255, 255, 255, 0.05);
}
.navbar-toggler {
  border: 1px solid var(--border-color);
  padding: 0.3rem 0.6rem;
}
.navbar-toggler-icon { filter: invert(0.7); }

/* ===========================
   Buttons
   =========================== */
.btn-accent {
  background: var(--gradient-brand);
  border: none;
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-accent:hover {
  color: #fff;
  opacity: 0.88;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(74, 222, 128, 0.28);
}
.btn-outline-accent {
  background: transparent;
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.btn-outline-accent:hover {
  background: rgba(74, 222, 128, 0.1);
  color: var(--accent-cyan);
  transform: translateY(-1px);
}

/* ===========================
   Hero Section
   =========================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 6rem 0 5rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(74, 222, 128, 0.07), transparent 70%);
}
.hero-section .container { position: relative; z-index: 1; }

.hero-eyebrow {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--accent-cyan);
  flex-shrink: 0;
}
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}
.hero-title {
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 400;
  margin-bottom: 1.5rem;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-bio {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 2.25rem;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 2.5rem;
}
.hero-social {
  display: flex;
  gap: 0.625rem;
  flex-wrap: wrap;
}
.hero-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.hero-social a:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: rgba(74, 222, 128, 0.08);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  padding: 1.75rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}
.hero-stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.hero-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ===========================
   Project Cards
   =========================== */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius) !important;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-accent) !important;
}
.project-card-img-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--bg-secondary);
}
.project-card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-card:hover .project-card-img-wrapper img { transform: scale(1.05); }
.project-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(6,13,6,0.88) 0%, rgba(6,13,6,0) 55%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 1rem;
}
.project-card:hover .project-card-overlay { opacity: 1; }
.project-card .card-body { padding: 1.25rem; background: var(--bg-card); }
.project-card .card-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.project-card .card-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.project-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }

/* Default tag — language / skill (green) */
.project-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.18rem 0.55rem;
  border-radius: 100px;
  background: rgba(74, 222, 128, 0.09);
  color: #4ade80;
  border: 1px solid rgba(74, 222, 128, 0.18);
}

/* Engine / tool tag — amber */
.project-tag.tag-engine {
  background: rgba(251, 191, 36, 0.09);
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.22);
}

/* Project-type tag — sky blue */
.project-tag.tag-type {
  background: rgba(56, 189, 248, 0.09);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.22);
}
.project-card .card-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 0.8rem 1.25rem;
}

/* Placeholder when no image is provided */
.img-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #0c160c, #0f2010);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  gap: 0.4rem;
}
.img-placeholder i { font-size: 2rem; opacity: 0.35; }

/* ===========================
   Timeline
   =========================== */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-cyan) 0%, var(--accent-indigo) 60%, transparent 100%);
  border-radius: 1px;
}
.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: calc(-2rem + 0px);
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.1);
  transition: background var(--transition), box-shadow var(--transition);
}
.timeline-item:hover .timeline-dot {
  background: var(--accent-cyan);
  box-shadow: 0 0 0 5px rgba(74, 222, 128, 0.18);
}
.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.timeline-item:hover .timeline-card {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-sm);
}
.timeline-period {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-cyan);
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}
.timeline-role {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}
.timeline-org {
  font-size: 0.875rem;
  color: var(--accent-indigo);
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.timeline-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}
.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.75rem;
}
.timeline-tag {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

/* ===========================
   Certifications
   =========================== */
.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all var(--transition);
  height: 100%;
}
.cert-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.cert-icon {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(74,222,128,0.12), rgba(34,197,94,0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: var(--accent-cyan);
}
.cert-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}
.cert-issuer {
  font-size: 0.78rem;
  color: var(--text-secondary);
}
.cert-date {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ===========================
   Project Page — Hero
   =========================== */
.project-hero {
  padding: 7rem 0 3rem;
  position: relative;
  overflow: hidden;
}
.project-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 32px 32px;
}
.project-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 0%, rgba(74,222,128,0.06), transparent 70%);
}
.project-hero .container { position: relative; z-index: 1; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  transition: color var(--transition);
}
.back-link:hover { color: var(--accent-cyan); }

.project-hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

/* ===========================
   Project Page — Details Card
   =========================== */
.detail-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  height: 100%;
}
.detail-card .card-body { padding: 1.5rem; }
.detail-card .card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}
.detail-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}
.detail-item:last-of-type { border-bottom: none; }
.detail-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--accent-cyan);
}
.detail-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
  line-height: 1;
  margin-bottom: 0.2rem;
}
.detail-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}
.detail-links {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ===========================
   Project Page — Content Sections
   =========================== */
.content-section { padding: 2.75rem 0; border-bottom: 1px solid var(--border-color); }
.content-section:last-child { border-bottom: none; }

.content-heading {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.content-heading::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.35rem;
  background: var(--gradient-brand);
  border-radius: 2px;
  flex-shrink: 0;
}
.content-text {
  font-size: 0.97rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 1rem;
}
.content-text:last-child { margin-bottom: 0; }
.content-text a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(74, 222, 128, 0.3);
  text-underline-offset: 3px;
  transition: color var(--transition), text-decoration-color var(--transition);
}
.content-text a:hover {
  color: var(--accent-green);
  text-decoration-color: var(--accent-green);
}

/* Code blocks */
.code-block-wrapper {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin: 1.5rem 0;
}
.code-block-header {
  background: #0c1a0c;
  padding: 0.55rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}
.code-block-lang {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
}
.code-copy-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: all var(--transition);
}
.code-copy-btn:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }
.code-block-wrapper pre[class*="language-"] {
  margin: 0 !important;
  border-radius: 0 !important;
  border: none !important;
  background: #080f08 !important;
  padding: 1.25rem 1.5rem !important;
  font-size: 0.84rem !important;
  line-height: 1.7 !important;
  overflow-x: auto;
}

/* Content images */
.content-image {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin: 1.5rem 0;
}
.content-image img { width: 100%; display: block; }
.content-image-caption {
  padding: 0.6rem 1rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg-card);
  text-align: center;
  font-style: italic;
}

/* ===========================
   Image lightbox
   Click a blog-post content image to open it centered, with scroll-to-zoom
   and drag-to-pan. Scoped to .article-content; behaviour lives in main.js.
   =========================== */
.article-content .content-image img { cursor: zoom-in; }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
  background: rgba(3, 8, 3, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}
.lightbox.open { opacity: 1; visibility: visible; }

.lightbox-img {
  max-width: 90vw;
  max-height: 82vh;
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  cursor: zoom-in;
  transform-origin: center center;
  will-change: transform;
  touch-action: none;
  user-select: none;
  -webkit-user-drag: none;
}
.lightbox-img.zoomed { cursor: zoom-out; }

.lightbox-caption {
  max-width: 90vw;
  text-align: center;
  font-size: 0.85rem;
  font-style: italic;
  color: var(--text-secondary);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition);
}
.lightbox-close:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.lightbox-hint {
  position: absolute;
  bottom: 1rem;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  pointer-events: none;
}

/* YouTube / video embeds */
.video-embed {
  margin: 1.5rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}
.video-embed iframe { display: block; }

/* ===========================
   About Page
   =========================== */
.about-hero {
  padding: 7rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}
.about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 32px 32px;
}
.about-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 30% 0%, rgba(74,222,128,0.06), transparent 70%);
}
.about-hero .container { position: relative; z-index: 1; }

.avatar-placeholder {
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a2234, #1e2d40);
  border: 3px solid rgba(74,222,128,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--text-muted);
}
.avatar-img {
  width: 170px;
  height: 170px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(74,222,128,0.3);
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.38rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.skill-tag:hover {
  border-color: var(--border-accent);
  color: var(--accent-cyan);
}
.skill-category-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ===========================
   Footer
   =========================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
}
.footer-brand {
  font-weight: 800;
  font-size: 1.1rem;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-text { font-size: 0.83rem; color: var(--text-muted); }
.footer-social { display: flex; gap: 0.6rem; }
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: all var(--transition);
}
.footer-social a:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: rgba(74,222,128,0.06);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 991px) {
  .hero-stats { justify-content: flex-start; }
  .navbar-collapse { background: rgba(10,14,26,0.96); padding: 1rem; border-radius: var(--radius); margin-top: 0.5rem; }
}
@media (max-width: 767px) {
  .hero-stats { gap: 1.5rem; }
  .timeline { padding-left: 1.75rem; }
  .cert-card { flex-direction: row; }
}
@media (max-width: 575px) {
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { flex-direction: row; flex-wrap: wrap; gap: 1.25rem 2rem; }
}

/* ===========================
   Blog — Callout / Prompt Boxes
   (mirrors the Chirpy prompt-tip/info/warning/danger style)
   =========================== */
.callout {
  display: flex;
  gap: 0.875rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid;
  margin: 1.5rem 0;
}
.callout-icon {
  font-size: 1.05rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.callout-body { flex: 1; min-width: 0; }
.callout-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}
.callout .callout-body p { margin-bottom: 0; font-size: 0.9rem; line-height: 1.7; }
.callout .callout-body p + p { margin-top: 0.5rem; }

/* Info — cyan */
.callout-info { background: rgba(74,222,128,0.06); border-color: var(--accent-cyan); }
.callout-info .callout-icon,
.callout-info .callout-title { color: var(--accent-cyan); }

/* Warning — amber */
.callout-warning { background: rgba(251,191,36,0.07); border-color: #fbbf24; }
.callout-warning .callout-icon,
.callout-warning .callout-title { color: #fbbf24; }

/* Tip — green */
.callout-tip { background: rgba(134,239,172,0.06); border-color: var(--accent-green); }
.callout-tip .callout-icon,
.callout-tip .callout-title { color: var(--accent-green); }

/* Danger — red */
.callout-danger { background: rgba(248,113,113,0.07); border-color: #f87171; }
.callout-danger .callout-icon,
.callout-danger .callout-title { color: #f87171; }

/* ===========================
   Blog — Article Typography
   =========================== */
.article-content { font-size: 0.97rem; }

.article-content > .callout:first-child {
  margin-top: 0;
}
.article-content .callout + h2,
.article-content .callout + h3 {
  margin-top: 0.5rem;
}
.article-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-top: 2.75rem;
  margin-bottom: 0.875rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  scroll-margin-top: 90px;
}
.article-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--accent-indigo);
  scroll-margin-top: 90px;
}
.article-content h4 {
  font-size: 0.97rem;
  font-weight: 700;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  scroll-margin-top: 90px;
}
.article-content p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 1.15rem;
}
.article-content ul,
.article-content ol {
  color: var(--text-secondary);
  line-height: 1.8;
  padding-left: 1.5rem;
  margin-bottom: 1.15rem;
}
.article-content li { margin-bottom: 0.3rem; }
.article-content strong { color: var(--text-primary); font-weight: 600; }

/* Inline code */
.article-content code:not([class*="language-"]) {
  background: rgba(255,255,255,0.07);
  color: var(--accent-cyan);
  padding: 0.12rem 0.42rem;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: var(--font-mono);
  border: 1px solid rgba(255,255,255,0.06);
}

/* Links inside article */
.article-content a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(74,222,128,0.3);
  text-underline-offset: 3px;
  transition: color var(--transition), text-decoration-color var(--transition);
}
.article-content a:hover {
  color: var(--accent-indigo);
  text-decoration-color: rgba(34,197,94,0.5);
}

/* Blockquote */
.article-content blockquote {
  border-left: 3px solid var(--accent-indigo);
  padding: 0.6rem 1rem;
  margin: 1.5rem 0;
  background: rgba(34,197,94,0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.article-content blockquote p { margin-bottom: 0; font-style: italic; }

/* Horizontal rule */
.article-content hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2.5rem 0;
}

/* ===========================
   Blog — Article Hero
   =========================== */
.article-hero {
  padding: 7rem 0 3rem;
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 32px 32px;
}
.article-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 0%, rgba(34,197,94,0.07), transparent 70%);
}
.article-hero .container { position: relative; z-index: 1; }

.article-hero-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.875rem;
}
.article-hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 0;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.article-meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* ===========================
   Blog — Table of Contents
   =========================== */
.toc {
  position: sticky;
  top: 80px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
}
.toc::-webkit-scrollbar { width: 4px; }
.toc::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 2px; }

.toc-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}
.toc-list { list-style: none; padding: 0; margin: 0; }
.toc-item { margin-bottom: 0.1rem; }
.toc-item-h3 { padding-left: 0.875rem; }
.toc-item-h4 { padding-left: 1.75rem; }
.toc-item-h4 .toc-link { font-size: 0.75rem; }
.toc-link {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 0.28rem 0.5rem;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
  line-height: 1.4;
  transition: all var(--transition);
}
.toc-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}
.toc-link.active {
  color: var(--accent-cyan);
  border-left-color: var(--accent-cyan);
  background: rgba(74,222,128,0.06);
}

/* ===========================
   Blog — Author Card
   =========================== */
.author-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-top: 3rem;
}
.author-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(74,222,128,0.25);
  flex-shrink: 0;
}
.author-avatar-placeholder {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a2234, #1e2d40);
  border: 2px solid rgba(74,222,128,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--text-muted);
  flex-shrink: 0;
}
.author-name { font-size: 0.92rem; font-weight: 700; color: var(--text-primary); }
.author-role { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.1rem; }

/* ===========================
   Blog — Listing Cards
   =========================== */
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all var(--transition);
}
.blog-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.blog-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
  display: block;
}
.blog-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.blog-card:hover .blog-card-img img { transform: scale(1.04); }
.blog-card-body { padding: 1.25rem; flex: 1; }
.blog-card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}
.blog-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  transition: color var(--transition);
}
.blog-card:hover .blog-card-title { color: var(--accent-cyan); }
.blog-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-footer {
  padding: 0.8rem 1.25rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.blog-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.blog-tag {
  font-size: 0.67rem;
  font-weight: 600;
  padding: 0.14rem 0.5rem;
  border-radius: 100px;
  background: rgba(74,222,128,0.09);
  color: #4ade80;
  border: 1px solid rgba(74,222,128,0.18);
}
/* Engine / tool variant — amber */
.blog-tag.tag-engine {
  background: rgba(251,191,36,0.09);
  color: #fbbf24;
  border-color: rgba(251,191,36,0.22);
}
/* Specialism variant — sky blue */
.blog-tag.tag-topic {
  background: rgba(56,189,248,0.09);
  color: #38bdf8;
  border-color: rgba(56,189,248,0.22);
}

/* ===========================
   Blog — Prev / Next nav
   =========================== */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}
.post-nav-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.post-nav-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-sm);
}
.post-nav-card.next { text-align: right; }
.post-nav-label { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); }
.post-nav-title { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); line-height: 1.4; }

@media (max-width: 575px) {
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-card.next { text-align: left; }
}

/* ===========================
   Blog — Homepage Teaser Cards
   (horizontal, compact — no thumbnail)
   =========================== */
.blog-teaser-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.blog-teaser-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.blog-teaser-body { flex: 1; min-width: 0; }
.blog-teaser-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
  transition: color var(--transition);
}
.blog-teaser-card:hover .blog-teaser-title { color: var(--accent-cyan); }
.blog-teaser-excerpt {
  font-size: 0.855rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-teaser-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.3rem;
  flex-shrink: 0;
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.blog-teaser-meta > i {
  font-size: 1rem;
  color: var(--accent-cyan);
  margin-top: 0.25rem;
  transition: transform var(--transition);
}
.blog-teaser-card:hover .blog-teaser-meta > i { transform: translateX(4px); }

@media (max-width: 575px) {
  .blog-teaser-card { flex-direction: column; align-items: flex-start; gap: 0.875rem; }
  .blog-teaser-meta { flex-direction: row; align-items: center; gap: 0.75rem; }
  .blog-teaser-meta > i { margin-top: 0; }
}

/* ===========================
   Blog listing — Tag filter bar
   =========================== */
.blog-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 48px;
}
.blog-filter-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-right: 4px;
  white-space: nowrap;
}
.blog-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(255,255,255,0.08);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
  line-height: 1;
}
.blog-filter-btn:hover {
  border-color: rgba(255,255,255,0.18);
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
}
/* Active — default / "All" / language (green) */
.blog-filter-btn.active {
  background: rgba(74,222,128,0.10);
  border-color: rgba(74,222,128,0.30);
  color: #4ade80;
}
/* Active — engine / tool (amber) */
.blog-filter-btn.filter-engine.active {
  background: rgba(251,191,36,0.10);
  border-color: rgba(251,191,36,0.30);
  color: #fbbf24;
}
/* Active — topic / specialism (sky blue) */
.blog-filter-btn.filter-topic.active {
  background: rgba(56,189,248,0.10);
  border-color: rgba(56,189,248,0.30);
  color: #38bdf8;
}
.blog-filter-count {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 100px;
  background: rgba(255,255,255,0.06);
  color: inherit;
  line-height: 1.4;
}
.blog-filter-btn.active .blog-filter-count {
  background: rgba(255,255,255,0.08);
}

/* ===========================
   Blog listing — Year groups
   =========================== */
.blog-year-group + .blog-year-group {
  margin-top: 52px;
}
.blog-year-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}
.blog-year-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}
.blog-year-line {
  flex: 1;
  height: 1px;
  background: rgba(255,255,255,0.06);
}
.blog-year-count {
  font-size: 0.7rem;
  font-weight: 500;
  color: #1a3320;
  white-space: nowrap;
}

/* ===========================
   Blog listing — Empty state
   =========================== */
.blog-empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}
.blog-empty-state i {
  font-size: 2.5rem;
  opacity: 0.25;
  display: block;
  margin-bottom: 16px;
}
.blog-empty-state p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ===========================
   3D Model Viewer
   =========================== */
.model-viewer-section {
  margin-bottom: 48px;
}
.model-viewer-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #060d06;
  border: 1px solid rgba(74, 222, 128, 0.14);
  border-radius: var(--radius);
  overflow: hidden;
}
.model-viewer-canvas {
  display: block;
  width: 100%;
  height: 100%;
}
.model-viewer-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(6, 13, 6, 0.85);
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 24px;
  pointer-events: none;
  transition: opacity 0.3s;
}
.model-viewer-overlay.hidden { opacity: 0; pointer-events: none; }
.model-viewer-overlay i { font-size: 2rem; opacity: 0.4; }
.model-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(74, 222, 128, 0.15);
  border-top-color: #4ade80;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.model-viewer-hint {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(6, 13, 6, 0.7);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 5px 14px;
  border-radius: 20px;
  white-space: nowrap;
  pointer-events: none;
  transition: opacity 0.5s;
}
.model-viewer-hint.hidden { opacity: 0; }
.model-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.model-tab {
  padding: 5px 16px;
  border-radius: 20px;
  border: 1px solid rgba(74, 222, 128, 0.18);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.model-tab:hover {
  border-color: rgba(74, 222, 128, 0.35);
  color: #4ade80;
}
.model-tab.active {
  background: rgba(74, 222, 128, 0.10);
  border-color: rgba(74, 222, 128, 0.35);
  color: #4ade80;
}
.model-viewer-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}
.model-action-btn {
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.model-action-btn:hover {
  border-color: rgba(74, 222, 128, 0.25);
  color: var(--text-primary);
}
.model-action-btn.active {
  background: rgba(74, 222, 128, 0.08);
  border-color: rgba(74, 222, 128, 0.25);
  color: #4ade80;
}