/* ==========================================================================
   Portfolio Redesign — Navy Dark Scheme
   ========================================================================== */

:root {
  --color-surface: #0f172a;
  --color-surface-dim: #0f172a;
  --color-surface-bright: #334155;
  --color-surface-container-lowest: #070d1a;
  --color-surface-container-low: #141f33;
  --color-surface-container: #1e293b;
  --color-surface-container-high: #263344;
  --color-surface-container-highest: #2e3a4d;
  --color-on-surface: #e2e8f0;
  --color-on-surface-variant: #cbd5e1;
  --color-inverse-surface: #e2e8f0;
  --color-inverse-on-surface: #1e293b;
  --color-outline: #64748b;
  --color-outline-variant: #475569;
  --color-primary: #93c5fd;
  --color-on-primary: #1e3a5f;
  --color-primary-container: #1e3a5f;
  --color-on-primary-container: #bfdbfe;
  --color-secondary: #06b6d4;
  --color-on-secondary: #ffffff;
  --color-secondary-container: #0284c7;
  --color-on-secondary-container: #155e75;
  --color-error: #ffb4ab;
  --color-on-error: #690005;
  --color-error-container: #93000a;
  --color-on-error-container: #ffdad6;
  --color-background: #0f172a;
  --color-on-background: #e2e8f0;
  --color-surface-variant: #2e3a4d;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-code: 'JetBrains Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-background);
  color: var(--color-on-background);
}

a { color: inherit; text-decoration: none; }

/* --- Backgrounds --- */
.bg-background { background-color: var(--color-background); }
.bg-surface { background-color: var(--color-surface); }
.bg-surface-container { background-color: var(--color-surface-container); }
.bg-surface-container-low { background-color: var(--color-surface-container-low); }
.bg-surface-container-high { background-color: var(--color-surface-container-high); }
.bg-primary-container { background-color: var(--color-primary-container); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-secondary\/10 { background-color: color-mix(in srgb, var(--color-secondary) 10%, transparent); }
.bg-secondary\/20 { background-color: color-mix(in srgb, var(--color-secondary) 20%, transparent); }
.bg-error-container\/10 { background-color: color-mix(in srgb, var(--color-error-container) 10%, transparent); }
.bg-surface\/60 { background-color: color-mix(in srgb, var(--color-surface) 60%, transparent); }
.bg-surface\/80 { background-color: color-mix(in srgb, var(--color-surface) 80%, transparent); }

/* --- Text --- */
.text-on-surface { color: var(--color-on-surface); }
.text-on-surface-variant { color: var(--color-on-surface-variant); }
.text-secondary { color: var(--color-secondary); }
.text-on-secondary { color: var(--color-on-secondary); }
.text-primary { color: var(--color-primary); }
.text-error { color: var(--color-error); }
.text-on-background { color: var(--color-on-background); }
.text-outline { color: var(--color-outline); }

/* --- Borders --- */
.border-secondary { border-color: var(--color-secondary); }
.border-secondary\/20 { border-color: color-mix(in srgb, var(--color-secondary) 20%, transparent); }
.border-secondary\/30 { border-color: color-mix(in srgb, var(--color-secondary) 30%, transparent); }
.border-secondary\/50 { border-color: color-mix(in srgb, var(--color-secondary) 50%, transparent); }
.border-outline-variant { border-color: var(--color-outline-variant); }
.border-outline-variant\/10 { border-color: color-mix(in srgb, var(--color-outline-variant) 10%, transparent); }
.border-outline-variant\/20 { border-color: color-mix(in srgb, var(--color-outline-variant) 20%, transparent); }
.border-outline-variant\/30 { border-color: color-mix(in srgb, var(--color-outline-variant) 30%, transparent); }
.border-error\/30 { border-color: color-mix(in srgb, var(--color-error) 30%, transparent); }

/* --- Font families --- */
.font-body-md, .font-body-lg, .font-label-caps { font-family: var(--font-body); }
.font-display-xl, .font-display-xl-mobile, .font-headline-lg, .font-headline-md { font-family: var(--font-display); }
.font-code-sm { font-family: var(--font-code); }

/* --- Font sizes --- */
.text-display-xl { font-size: 60px; line-height: 1.1; letter-spacing: -0.02em; font-weight: 700; }
.text-display-xl-mobile { font-size: 40px; line-height: 1.2; letter-spacing: -0.02em; font-weight: 700; }
.text-headline-lg { font-size: 32px; line-height: 1.2; font-weight: 600; }
.text-headline-md { font-size: 24px; line-height: 1.3; font-weight: 600; }
.text-body-lg { font-size: 18px; line-height: 1.6; font-weight: 400; }
.text-body-md { font-size: 16px; line-height: 1.6; font-weight: 400; }
.text-label-caps { font-size: 12px; line-height: 1.0; letter-spacing: 0.05em; font-weight: 600; text-transform: uppercase; }
.text-code-sm { font-size: 14px; line-height: 1.5; font-weight: 400; }

/* --- Custom spacing --- */
.gap-stack-sm { gap: 8px; }
.gap-stack-md { gap: 16px; }
.gap-stack-lg { gap: 32px; }
.gap-section-gap { gap: 80px; }
.p-stack-md { padding: 16px; }
.p-stack-lg { padding: 32px; }
.px-gutter { padding-left: 24px; padding-right: 24px; }
.py-stack-lg { padding-top: 32px; padding-bottom: 32px; }
.mb-stack-sm { margin-bottom: 8px; }
.mb-stack-md { margin-bottom: 16px; }
.mb-stack-lg { margin-bottom: 32px; }
.mb-section-gap { margin-bottom: 80px; }
.mt-section-gap { margin-top: 80px; }
.pt-stack-sm { padding-top: 8px; }
.pt-section-gap { padding-top: 80px; }
.pb-section-gap { padding-bottom: 80px; }

/* --- Border radius --- */
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

/* --- Container --- */
.max-w-container-max { max-width: 1200px; margin-left: auto; margin-right: auto; }

/* --- Line clamp --- */
.line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.line-clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* --- Mesh Gradient --- */
.mesh-gradient {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: -1;
  background:
    radial-gradient(at 0% 0%, rgba(6, 182, 212, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.08) 0px, transparent 50%);
  filter: blur(100px);
}

/* --- Glass Card (fixed: uses Deep Navy bg, not gray) --- */
.glass-card {
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(71, 85, 105, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

/* --- Logo/badge icon sizing --- */
.skill-badge-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
  vertical-align: middle;
}
.skill-badge-icon.fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, #06b6d4, #0284c7);
  color: #ffffff;
  border-radius: 3px;
  font-size: 8px;
  font-weight: 600;
}
.skill-icon-small {
  width: 12px;
  height: 12px;
  display: inline-block;
  vertical-align: middle;
}
.skill-icon-small.fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 12px;
  height: 12px;
  background: linear-gradient(135deg, #06b6d4, #0284c7);
  color: #ffffff;
  border-radius: 2px;
  font-size: 7px;
  font-weight: 600;
}
.school-logo, .company-logo {
  width: 14px;
  height: 14px;
  display: inline-block;
  vertical-align: middle;
  border-radius: 3px;
}
.school-logo-fallback, .company-logo-fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, #06b6d4, #0284c7);
  color: #ffffff;
  border-radius: 3px;
  font-size: 8px;
  font-weight: 600;
  vertical-align: middle;
}

/* --- Timeline --- */
.timeline-line {
  background: linear-gradient(to bottom, #06b6d4 0%, transparent 100%);
}

/* --- Material Symbols --- */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* --- Mobile menu: always hidden on desktop --- */
@media (min-width: 768px) {
  #mobile-menu { display: none !important; }
}

/* --- Custom Scrollbar --- */
.custom-scrollbar::-webkit-scrollbar { width: 4px; }
.custom-scrollbar::-webkit-scrollbar-track { background: transparent; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #2e3a4d; border-radius: 10px; }

/* --- Article Content --- */
.article-content { max-width: 800px; margin-left: auto; margin-right: auto; }

.article-content h1, .article-content h2, .article-content h3, .article-content h4 {
  font-family: var(--font-display); font-weight: 600;
  color: var(--color-on-surface); margin-top: 2rem; margin-bottom: 0.75rem;
}
.article-content h1 { font-size: 2rem; }
.article-content h2 { font-size: 1.5rem; }
.article-content h3 { font-size: 1.25rem; }

.article-content p {
  font-family: var(--font-body); font-size: 1.125rem; line-height: 1.8;
  color: var(--color-on-surface-variant); margin-bottom: 1.25rem;
}

.article-content ul, .article-content ol {
  font-family: var(--font-body); font-size: 1.125rem; line-height: 1.8;
  color: var(--color-on-surface-variant); margin-bottom: 1.25rem; padding-left: 1.5rem;
}

.article-content li { margin-bottom: 0.5rem; }

.article-content a { color: var(--color-secondary); text-decoration: underline; text-underline-offset: 2px; }
.article-content a:hover { opacity: 0.8; }

.article-content pre {
  background: var(--color-surface-container-lowest);
  border: 1px solid rgba(71, 85, 105, 0.2);
  border-radius: 0.75rem; padding: 1.25rem; overflow-x: auto;
  margin-bottom: 1.5rem; font-family: var(--font-code);
  font-size: 0.875rem; line-height: 1.6;
}

.article-content code {
  font-family: var(--font-code); font-size: 0.875rem;
  background: color-mix(in srgb, var(--color-secondary) 10%, transparent);
  padding: 0.125rem 0.375rem; border-radius: 0.25rem;
}

.article-content pre code { background: none; padding: 0; border-radius: 0; }

.article-content blockquote {
  border-left: 3px solid var(--color-secondary);
  padding-left: 1rem; margin: 1.5rem 0;
  font-style: italic; color: var(--color-outline);
}

.article-content img { border-radius: 0.75rem; max-width: 100%; height: auto; margin: 1.5rem 0; }

.article-content hr { border: none; border-top: 1px solid rgba(71, 85, 105, 0.2); margin: 2rem 0; }

/* ==========================================================================
   Micro-Interactions — Scroll Reveal, Hover, Theme, Progress, Nav
   ========================================================================== */

/* --- Scroll Reveal --- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="100"] { transition-delay: 100ms; }
[data-reveal-delay="200"] { transition-delay: 200ms; }
[data-reveal-delay="300"] { transition-delay: 300ms; }

/* --- Enhanced Glass Card Hover --- */
.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.5);
  box-shadow: 0 20px 50px -12px rgba(0, 0, 0, 0.6),
              0 0 0 1px rgba(6, 182, 212, 0.1);
}

/* --- Animated Mesh Gradient --- */
@keyframes mesh-shift {
  0%, 100% {
    background-position: 0% 0%;
    filter: blur(100px);
  }
  33% {
    background-position: 100% 0%;
  }
  66% {
    background-position: 50% 100%;
  }
}

.mesh-gradient {
  animation: mesh-shift 25s ease-in-out infinite;
  background-size: 200% 200%;
}

/* --- Reading Progress Bar --- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-primary));
  z-index: 9999;
  width: 0%;
  transition: width 50ms linear;
  will-change: width;
}

/* --- Animated Nav Indicator --- */
.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 1px;
  transition: width 0.2s ease, left 0.2s ease;
}

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

/* --- Theme Toggle Rotation --- */
.theme-toggle-icon {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-icon.rotated {
  transform: rotate(180deg);
}

/* --- Experience Timeline Item Reveal --- */
.timeline-item {
  opacity: 0;
  transform: translateX(-16px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline-item.revealed {
  opacity: 1;
  transform: translateX(0);
}

.timeline-item:nth-child(1) { transition-delay: 0ms; }
.timeline-item:nth-child(2) { transition-delay: 100ms; }
.timeline-item:nth-child(3) { transition-delay: 200ms; }
.timeline-item:nth-child(4) { transition-delay: 300ms; }

/* --- Skill Tag Enhanced Hover --- */
.skill-tag {
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.15);
}

/* --- Blog Card Image Zoom (ensures parent overflow hidden) --- */
.blog-card-image img {
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.blog-card-image:hover img {
  transform: scale(1.03);
}

/* --- Resume Page Emphasis --- */
.resume-role {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-on-surface);
  line-height: 1.3;
}

.resume-company {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-secondary);
}

.resume-impact {
  font-weight: 500;
  color: var(--color-on-surface-variant);
}

.resume-meta {
  font-size: 0.875rem;
  color: var(--color-outline);
}

/* ==========================================================================
   Level 1: UI Polish — Micro-interactions & Visual Depth
   ========================================================================== */

/* Card hover with lift and shadow glow */
.glass-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.glass-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.25);
}

/* Button bounce on click */
.glass-card a:active,
button[type="submit"]:active,
.btn:active {
  transform: scale(0.95);
}

/* Glass-morphism badge */
.glass-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.10);
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: inherit;
  transition: all 0.3s ease;
}

.glass-badge:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.20);
  transform: translateY(-1px);
}

/* Post meta — elegant date & read time */
.post-meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.8rem;
  color: var(--on-surface-variant);
  opacity: 0.65;
  font-weight: 400;
}

.post-meta .dot {
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--on-surface-variant);
  opacity: 0.35;
}

/* Category icon overlay for blog cards */
.blog-card-icon {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 1.25rem;
  opacity: 0.9;
  z-index: 2;
}

/* Responsive tweaks */
@media (max-width: 768px) {
  .glass-badge {
    padding: 0.25rem 0.5rem;
    font-size: 0.6rem;
  }

  .post-meta {
    font-size: 0.7rem;
    gap: 0.5rem;
  }

  .blog-card-icon {
    width: 2rem;
    height: 2rem;
    font-size: 1rem;
    top: 0.75rem;
    right: 0.75rem;
  }
}

/* Dark mode overrides for glass effects */
@media (prefers-color-scheme: dark) {
  .glass-badge {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.07);
  }

  .glass-badge:hover {
    background: rgba(255, 255, 255, 0.10);
    border-color: rgba(255, 255, 255, 0.15);
  }
}

/* ==========================================================================
   Level 1: Hero name gradient & availability dot
   ========================================================================== */

.hero-name {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.availability-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ==========================================================================
   Level 1: Experience Timeline (home page)
   ========================================================================== */

.exp-timeline-node {
  position: relative;
  flex-shrink: 0;
  width: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.exp-timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-secondary);
  border: 3px solid rgba(6, 182, 212, 0.2);
  z-index: 2;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.exp-timeline-item:hover .exp-timeline-dot {
  transform: scale(1.2);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
}

.exp-timeline-line {
  flex: 1;
  width: 2px;
  background: linear-gradient(to bottom, rgba(6, 182, 212, 0.2), rgba(6, 182, 212, 0.05));
  position: absolute;
  top: 22px;
  bottom: -48px;
  left: 50%;
  transform: translateX(-50%);
}

.exp-timeline-item:last-child .exp-timeline-line {
  display: none;
}

/* ==========================================================================
   Level 1: Floating contact CTA & modal
   ========================================================================== */

.floating-cta {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 1.5rem 0.875rem 1.125rem;
  border-radius: 999px;
  background: var(--color-secondary);
  color: var(--color-on-secondary);
  border: none;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  box-shadow: 0 8px 32px rgba(6, 182, 212, 0.35);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 1000;
  font-family: 'Inter', sans-serif;
}

.floating-cta:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 40px rgba(6, 182, 212, 0.45);
}

.floating-cta:active {
  transform: scale(0.95);
}

.contact-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 1.25rem;
}

.contact-overlay.active {
  display: flex;
}

.contact-modal {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 1.5rem;
  padding: 3rem;
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--on-surface-variant);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--on-surface);
}

@media (max-width: 640px) {
  .floating-cta {
    bottom: 1.25rem;
    right: 1.25rem;
    padding: 0.75rem 1.125rem;
    font-size: 0.85rem;
  }

  .contact-modal {
    padding: 1.5rem;
  }
}

/* ==========================================================================
   Enhanced Blog Cards — category color accents
   ========================================================================== */

.blog-card-base {
  position: relative;
  background: linear-gradient(145deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 100%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 4px 24px rgba(0,0,0,0.2);
  border-left: 4px solid transparent;
}

.blog-card-base:hover {
  transform: translateY(-8px);
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 20px 48px -12px rgba(0,0,0,0.5);
}

.blog-card-engineering {
  border-left-color: #3b82f6;
  background: linear-gradient(145deg, rgba(59,130,246,0.06) 0%, rgba(255,255,255,0.01) 100%);
}
.blog-card-engineering:hover {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 20px 48px -12px rgba(0,0,0,0.5), 0 0 60px rgba(59,130,246,0.08);
}

.blog-card-architecture {
  border-left-color: #7c3aed;
  background: linear-gradient(145deg, rgba(124,58,237,0.06) 0%, rgba(255,255,255,0.01) 100%);
}
.blog-card-architecture:hover {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 20px 48px -12px rgba(0,0,0,0.5), 0 0 60px rgba(124,58,237,0.08);
}

.blog-card-leadership {
  border-left-color: #f59e0b;
  background: linear-gradient(145deg, rgba(245,158,11,0.06) 0%, rgba(255,255,255,0.01) 100%);
}
.blog-card-leadership:hover {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 20px 48px -12px rgba(0,0,0,0.5), 0 0 60px rgba(245,158,11,0.08);
}

.blog-card-tutorial {
  border-left-color: #10b981;
  background: linear-gradient(145deg, rgba(16,185,129,0.06) 0%, rgba(255,255,255,0.01) 100%);
}
.blog-card-tutorial:hover {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 20px 48px -12px rgba(0,0,0,0.5), 0 0 60px rgba(16,185,129,0.08);
}

.blog-card-case-study {
  border-left-color: #ef4444;
  background: linear-gradient(145deg, rgba(239,68,68,0.06) 0%, rgba(255,255,255,0.01) 100%);
}
.blog-card-case-study:hover {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 20px 48px -12px rgba(0,0,0,0.5), 0 0 60px rgba(239,68,68,0.08);
}

.blog-card-news {
  border-left-color: #ec4899;
  background: linear-gradient(145deg, rgba(236,72,153,0.06) 0%, rgba(255,255,255,0.01) 100%);
}
.blog-card-news:hover {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 20px 48px -12px rgba(0,0,0,0.5), 0 0 60px rgba(236,72,153,0.08);
}

.blog-card-title {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  color: #fff;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  transition: color 0.3s ease;
}

.blog-card-engineering .blog-card-title { color: #60a5fa; }
.blog-card-architecture .blog-card-title { color: #a78bfa; }
.blog-card-leadership .blog-card-title { color: #fbbf24; }
.blog-card-tutorial .blog-card-title { color: #34d399; }
.blog-card-case-study .blog-card-title { color: #f87171; }
.blog-card-news .blog-card-title { color: #f472b6; }

.blog-card-base:hover .blog-card-title { color: #fff !important; }

.blog-card-excerpt {
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.65);
  margin-bottom: 1.25rem;
}

.blog-card-read {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.3s ease;
  padding: 6px 0;
  position: relative;
}

.blog-card-read::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width 0.3s ease;
}

.blog-card-read:hover::after { width: 100%; }

.blog-card-engineering .blog-card-read { color: #60a5fa; }
.blog-card-architecture .blog-card-read { color: #a78bfa; }
.blog-card-leadership .blog-card-read { color: #fbbf24; }
.blog-card-tutorial .blog-card-read { color: #34d399; }
.blog-card-case-study .blog-card-read { color: #f87171; }
.blog-card-news .blog-card-read { color: #f472b6; }

.blog-card-icon-enhanced {
  width: 4rem;
  height: 4rem;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1.25rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.blog-card-engineering .blog-card-icon-enhanced { background: rgba(59,130,246,0.08); border-color: rgba(59,130,246,0.15); }
.blog-card-architecture .blog-card-icon-enhanced { background: rgba(124,58,237,0.08); border-color: rgba(124,58,237,0.15); }
.blog-card-leadership .blog-card-icon-enhanced { background: rgba(245,158,11,0.08); border-color: rgba(245,158,11,0.15); }
.blog-card-tutorial .blog-card-icon-enhanced { background: rgba(16,185,129,0.08); border-color: rgba(16,185,129,0.15); }
.blog-card-case-study .blog-card-icon-enhanced { background: rgba(239,68,68,0.08); border-color: rgba(239,68,68,0.15); }
.blog-card-news .blog-card-icon-enhanced { background: rgba(236,72,153,0.08); border-color: rgba(236,72,153,0.15); }

.blog-card-base:hover .blog-card-icon-enhanced {
  transform: scale(1.08) rotate(-2deg);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.blog-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.blog-grid > :first-child {
  grid-column: 1 / -1;
}

@media (max-width: 1024px) {
  .blog-grid { grid-template-columns: 1fr; }
  .blog-grid > :first-child { grid-column: 1; }
}

@media (max-width: 768px) {
  .blog-card-base { padding: 1.5rem; }
  .blog-card-title { font-size: 1.2rem; }
  .blog-card-icon-enhanced { width: 3rem; height: 3rem; font-size: 1.5rem; }
}

/* --- Stale section removed — see 'Experience card — architectural' below --- */

/* ==========================================================================
   Level 2: Homepage Glassmorphism Redesign
   ========================================================================== */

/* --- Availability badge --- */
.availability-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px 6px 12px;
  border-radius: 100px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.15);
  color: #34d399;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  backdrop-filter: blur(8px);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  animation: pulse-dot 2s ease-in-out infinite;
  display: inline-block;
}

/* --- Gradient buttons --- */
.btn-primary {
  background: linear-gradient(135deg, var(--color-secondary), #3b82f6);
  color: var(--color-on-secondary);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 16px rgba(6, 182, 212, 0.25);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(6, 182, 212, 0.35);
}

.btn-primary:active {
  transform: scale(0.95);
}

.btn-glass {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px);
  color: var(--color-on-surface);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  gap: 8px;
}

.btn-glass:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  background: rgba(6, 182, 212, 0.06);
  box-shadow: 0 0 24px rgba(6, 182, 212, 0.08);
  transform: translateY(-2px);
}

/* --- Skill pills --- */
.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-on-surface-variant);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 4px 16px rgba(0,0,0,0.1);
}

.skill-pill:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* --- Category pill for blog cards --- */
/* --- Blog card — clean professional --- */
.blog-card-base {
  position: relative;
  background: linear-gradient(145deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.02) 100%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.05);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.blog-card-base:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.14);
  box-shadow: 0 12px 36px -8px rgba(0,0,0,0.3);
}

.blog-card-image {
  width: 100%;
  height: 200px;
  border-radius: 0.75rem;
  overflow: hidden;
  margin-bottom: 1rem;
  background: rgba(255,255,255,0.03);
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 1rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--color-secondary);
}

.blog-card-category {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(6, 182, 212, 0.08);
  color: var(--color-secondary);
}

.blog-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  color: var(--color-on-surface);
  transition: color 0.3s ease;
}

.blog-card-base:hover .blog-card-title {
  color: var(--color-secondary);
}

.blog-card-excerpt {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
  margin-bottom: 1.25rem;
}

.blog-card-read {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-secondary);
  transition: gap 0.3s ease;
  margin-top: auto;
}

.blog-card-base:hover .blog-card-read {
  gap: 0.75rem;
}

/* --- Experience card — architectural --- */
.exp-card-base {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: 18px;
  padding: 2rem;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.exp-card-base:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  background: var(--color-surface-container);
  box-shadow: 0 8px 24px rgba(0,0,0,0.05);
}

.exp-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding-bottom: 0.75rem;
}

.exp-card-title-group {
  flex: 1;
  min-width: 0;
}

.exp-role-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-on-surface);
  margin-bottom: 0.25rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.exp-company-row {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.exp-company-row img,
.exp-company-row .company-logo-fallback {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  flex-shrink: 0;
}

.exp-company-name {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-secondary);
}

.exp-date {
  font-size: 0.75rem;
  font-weight: 500;
  color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  padding: 3px 10px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.exp-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

.exp-card-meta {
  margin-bottom: 1.25rem;
}

.exp-bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 70ch;
}

.exp-bullets li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.55);
}

.exp-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-secondary);
  opacity: 0.5;
}

.exp-tech-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-outline-variant);
}

.exp-tag-sm {
  font-size: 0.6rem;
  padding: 4px 10px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-weight: 500;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.35);
  transition: all 0.2s ease;
  cursor: default;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.exp-tag-sm:hover {
  background: rgba(6,182,212,0.06);
  border-color: rgba(6,182,212,0.12);
  color: var(--color-secondary);
}

/* --- reCAPTCHA dark theme container --- */
.recaptcha-wrap {
  background: var(--color-surface-container);
  border-radius: 0.5rem;
  padding: 0.75rem;
  display: inline-block;
}

.recaptcha-wrap iframe {
  border-radius: 0.25rem;
}

/* --- CTA button arrow hover --- */
.btn-primary .material-symbols-outlined,
.btn-glass .material-symbols-outlined {
  transition: transform 0.2s ease;
}

.btn-primary:hover .material-symbols-outlined,
.btn-glass:hover .material-symbols-outlined {
  transform: translateX(4px);
}

/* --- Contact form constraint --- */
.contact-form {
  max-width: 480px;
}

/* --- Mobile hero typography --- */
@media (max-width: 640px) {
  .hero-bio {
    line-height: 1.8;
  }

  .hero-name {
    margin-bottom: 0.5rem;
  }
}

/* --- Mobile file upload --- */
@media (max-width: 640px) {
  #drop-zone {
    padding-top: 1rem;
    padding-bottom: 1rem;
  }
}

/* ==========================================================================
   Top Navigation — Page-level links (Home, Blog, Resume, Contact)
   ========================================================================== */

.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 45;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem;
  height: 3.5rem;
  padding: 0 1.5rem;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(71, 85, 105, 0.15);
}

.top-nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.625rem;
  border-radius: 8px;
  color: var(--color-on-surface-variant);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.top-nav-link i {
  font-size: 1.1rem;
  color: var(--color-outline);
  transition: color 0.15s;
}

.top-nav-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-on-surface);
}

.top-nav-link:hover i {
  color: var(--color-secondary);
}

.top-nav-link.active {
  color: var(--color-on-surface);
}

.top-nav-link.active i {
  color: var(--color-secondary);
}

.top-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-secondary);
  color: var(--color-on-secondary);
  padding: 0.375rem 1rem;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.75rem;
  text-decoration: none;
  transition: filter 0.15s;
  white-space: nowrap;
  margin-left: 0.25rem;
}

.top-nav-cta i {
  font-size: 0.85rem;
}

.top-nav-cta:hover {
  filter: brightness(1.1);
}

@media (min-width: 1024px) {
  .top-nav {
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 0 2.5rem;
  }

  .top-nav-link {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
  }

  .top-nav-link i {
    font-size: 1rem;
  }

  .top-nav-cta {
    padding: 0.45rem 1.5rem;
    font-size: 0.8125rem;
    margin-left: 0.5rem;
  }
}

@media (max-width: 1023px) {
  .top-nav {
    justify-content: center;
    gap: 0.75rem;
  }

  .top-nav-link span {
    display: none;
  }

  .top-nav-link i {
    font-size: 1.3rem;
  }

  .top-nav-cta {
    padding: 0.3rem 0.9rem;
    font-size: 0.7rem;
  }
  .top-nav-cta span {
    display: inline;
  }
}

/* ==========================================================================
   Sidebar — Floating Glass Section Navigation
   ========================================================================== */

.sidebar {
  display: none;
  position: fixed;
  top: 50%;
  left: 1.25rem;
  transform: translateY(-50%);
  z-index: 50;
  background: rgba(15, 23, 42, 0.35);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(71, 85, 105, 0.12);
  border-radius: 16px;
  padding: 0.6rem 0.4rem;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.sidebar-nav-label {
  font-size: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(148, 163, 184, 0.6);
  font-weight: 600;
  padding: 0.3rem 0.6rem 0.15rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  color: rgba(203, 213, 225, 0.7);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.sidebar-link i {
  width: 1rem;
  font-size: 0.8rem;
  color: rgba(148, 163, 184, 0.6);
  text-align: center;
  flex-shrink: 0;
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #e2e8f0;
}

.sidebar-link:hover i {
  color: var(--color-secondary);
}

.sidebar-link.active {
  background: rgba(6, 182, 212, 0.12);
  color: var(--color-secondary);
  font-weight: 600;
}

.sidebar-link.active i {
  color: var(--color-secondary);
}

@media (min-width: 1024px) {
  .sidebar {
    display: flex;
  }
}

/* ==========================================================================
   Mobile Bottom Navigation — Glass-morphism
   ========================================================================== */

.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.25);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid rgba(71, 85, 105, 0.08);
  box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.1);
  padding: 0.45rem 0.3rem calc(0.45rem + env(safe-area-inset-bottom, 0px));
  z-index: 999;
  justify-content: space-around;
  align-items: center;
}

.mobile-bottom-nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
  text-decoration: none;
  color: rgba(148, 163, 184, 0.8);
  font-size: 0.5rem;
  font-weight: 500;
  padding: 0.2rem 0.4rem;
  border-radius: 12px;
  transition: color 0.15s;
  min-width: 3rem;
  border: none;
  background: transparent;
}

.mobile-bottom-nav a i {
  font-size: 1.2rem;
  color: rgba(148, 163, 184, 0.7);
  transition: color 0.15s;
}

.mobile-bottom-nav a.active {
  color: #e2e8f0;
}

.mobile-bottom-nav a.active i {
  color: #06b6d4;
}

.mobile-bottom-nav a:hover i {
  color: #06b6d4;
}

@media (max-width: 1023px) {
  .mobile-bottom-nav {
    display: flex;
  }

  body:has(.mobile-bottom-nav) main,
  body:has(.mobile-bottom-nav) .blog-main {
    padding-bottom: 5rem;
  }
}

@media (min-width: 1024px) {
  .mobile-bottom-nav {
    display: none !important;
  }
}

/* scroll-margin-top for section anchor offsets */
section[id] {
  scroll-margin-top: 5rem;
}

/* ==========================================================================
   Page Section Partitions
   ========================================================================== */

.page-section {
  position: relative;
  padding: 3rem 0;
}

.page-section:not(:last-child)::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(71, 85, 105, 0.2), transparent);
}

.page-section:first-child {
  padding-top: 0;
}