/* ==========================================================================
   PORTFOLIO STYLESHEET: ROGELIO LEONARDO MÉNDEZ MACÍAS (ROY)
   Dark/Technical Edge AI & Embedded Systems Theme
   ========================================================================== */

:root {
  /* Color Palette: Dark Technical Slate & Hardware Accents */
  --bg-core: #070D17;
  --bg-surface-1: #0D1626;
  --bg-surface-2: #132238;
  --bg-surface-3: #1A2D4A;
  --bg-card: rgba(13, 22, 38, 0.85);
  --bg-card-hover: rgba(20, 35, 59, 0.95);
  
  --border-subtle: rgba(74, 111, 165, 0.2);
  --border-accent: rgba(56, 189, 248, 0.4);
  --border-gold: rgba(196, 154, 60, 0.45);
  
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  
  --accent-cyan: #38BDF8;
  --accent-cyan-dim: #0284C7;
  --accent-gold: #C49A3C;
  --accent-gold-bright: #EAB308;
  --accent-emerald: #10B981;
  --accent-purple: #818CF8;
  
  --font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Space Mono", "JetBrains Mono", Consolas, monospace;
  
  --nav-height: 68px;
  --container-max: 1240px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 9999px;
  
  --shadow-card: 0 8px 32px -8px rgba(0, 0, 0, 0.55);
  --shadow-glow-cyan: 0 0 25px -5px rgba(56, 189, 248, 0.25);
  --shadow-glow-gold: 0 0 25px -5px rgba(196, 154, 60, 0.25);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  background-color: var(--bg-core);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-core);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.08), transparent 70%),
    radial-gradient(circle at 100% 30%, rgba(196, 154, 60, 0.04), transparent 50%),
    linear-gradient(to bottom, transparent, rgba(7, 13, 23, 0.95));
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Subtle Circuit Grid Overlay */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.012) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ==========================================================================
   ANIMATED PCB CIRCUIT BOARD BACKGROUND (Canvas)
   ========================================================================== */
.circuit-bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.24; /* Calibrated within 15-25% range for high legibility */
  transition: opacity 0.5s ease;
}

@media (prefers-reduced-motion: reduce) {
  .circuit-bg-canvas {
    opacity: 0.18;
  }
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.mono {
  font-family: var(--font-mono);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(7, 13, 23, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot 2.5s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.brand-alias {
  color: var(--accent-gold);
  font-size: 0.85rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s ease;
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Language Toggle Button */
.lang-toggle {
  display: flex;
  align-items: center;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--text-dim);
  transition: all 0.2s ease;
}

.lang-btn.active {
  background: var(--accent-cyan);
  color: #070D17;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

.lang-btn:hover:not(.active) {
  color: var(--text-main);
}

/* Mobile Nav Toggle */
.mobile-menu-btn {
  display: none;
  color: var(--text-main);
  padding: 6px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--nav-height) + 54px);
  padding-bottom: 72px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-edge-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  width: fit-content;
}

.hero-title-group h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.15;
  color: #FFFFFF;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.hero-title-group .hero-alias {
  color: var(--accent-gold);
  font-weight: 500;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: -0.01em;
  border-left: 3px solid var(--accent-cyan);
  padding-left: 12px;
  margin-top: 4px;
}

.hero-tagline {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  font-family: var(--font-mono);
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  padding: 14px 18px;
  border-radius: var(--radius-md);
}

/* Achievement Badges Row */
.achievement-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

.badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 700;
  background: rgba(196, 154, 60, 0.1);
  border: 1px solid rgba(196, 154, 60, 0.35);
  color: #FCD34D;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-gold);
}

/* Hero CTAs */
.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent-cyan);
  color: #070D17;
  font-weight: 700;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  box-shadow: 0 4px 18px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
  background: #7DD3FC;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(56, 189, 248, 0.45);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-surface-2);
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--bg-surface-3);
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

/* Hero Telemetry Card */
.hero-telemetry {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.hero-telemetry::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-gold));
}

.telemetry-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 18px;
}

.telemetry-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.telemetry-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-emerald);
}

.telemetry-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.metric-box {
  background: var(--bg-surface-1);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.2;
}

.metric-unit {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  margin-left: 2px;
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 4px;
}

.telemetry-footnote {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed rgba(255, 255, 255, 0.07);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   GLOBAL SECTION ARCHITECTURE
   ========================================================================== */
.section {
  padding: 72px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
}

.section-head {
  margin-bottom: 40px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.section-label::before {
  content: "//";
  color: var(--accent-gold);
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.02em;
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  position: relative;
}

.about-content-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 36px;
  align-items: center;
}

@media (max-width: 860px) {
  .about-content-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    justify-items: center;
  }
}

.about-photo-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 240px;
}

.about-photo-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #11161D;
  border: 1.5px solid #6CC24A;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 20px -3px rgba(108, 194, 74, 0.35);
  clip-path: polygon(14px 0%, calc(100% - 14px) 0%, 100% 14px, 100% calc(100% - 14px), calc(100% - 14px) 100%, 14px 100%, 0% calc(100% - 14px), 0% 14px);
  overflow: hidden;
  transition: all 0.3s ease;
}

.about-photo-frame:hover {
  border-color: #80EB5A;
  transform: scale(1.02);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.8), 0 0 25px rgba(108, 194, 74, 0.5);
}

.about-photo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 15%;
  display: block;
}

.about-photo-status {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(10, 10, 10, 0.85);
  border: 1px solid #215732;
  padding: 4px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
  z-index: 2;
}

.about-bio-wrapper {
  display: flex;
  flex-direction: column;
}

.about-text {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #E6EDF3;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.about-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.highlight-icon {
  color: var(--accent-gold);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   SKILLS SECTION (Grouped Chips)
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.skill-category-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.category-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.category-header.differentiator .category-icon {
  background: rgba(196, 154, 60, 0.15);
  color: var(--accent-gold);
}

.category-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: #FFFFFF;
}

.category-header.differentiator .category-title {
  color: #FDE047;
}

.chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--bg-surface-1);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #CBD5E1;
  padding: 6px 11px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.skill-chip:hover {
  border-color: var(--accent-cyan);
  color: #FFFFFF;
  background: var(--bg-surface-3);
}

.skill-category-card:hover .skill-chip {
  border-color: rgba(56, 189, 248, 0.25);
}

/* ==========================================================================
   FEATURED PROJECTS SECTION (Compact Card Deck & Spotlight Modal)
   ========================================================================== */
.projects-section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
}

.carousel-nav-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.carousel-counter {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
  min-width: 60px;
  text-align: center;
}

.carousel-nav-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #E2E8F0;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.carousel-nav-btn:hover:not(:disabled) {
  background: var(--accent-cyan);
  color: #0B0F14;
  border-color: var(--accent-cyan);
  transform: scale(1.05);
}

.carousel-nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.projects-carousel-wrapper {
  position: relative;
  overflow: hidden;
  margin-top: 24px;
}

/* Compact Grid / Deck of Project Cards */
.projects-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.project-mini-card {
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.project-mini-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  transition: background 0.3s ease;
}

.project-mini-card:hover {
  background: var(--bg-surface-2);
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(56, 189, 248, 0.15);
}

.project-mini-card:hover::before {
  background: var(--accent-cyan);
}

.mini-card-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-gold);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.mini-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.35;
  margin-bottom: 8px;
}

.mini-card-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.mini-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.mini-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.mini-tag.video-tag {
  color: #38BDF8;
  border-color: rgba(56, 189, 248, 0.3);
  background: rgba(56, 189, 248, 0.08);
}

.mini-tag.live-tag {
  color: #6CC24A;
  border-color: rgba(108, 194, 74, 0.3);
  background: rgba(108, 194, 74, 0.08);
}

.mini-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.mini-card-cta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.02em;
}

.mini-card-arrow {
  color: var(--accent-cyan);
  transition: transform 0.2s ease;
}

.project-mini-card:hover .mini-card-arrow {
  transform: translateX(4px);
}

/* ==========================================================================
   SPOTLIGHT DETAIL MODAL & BLUR BACKGROUND
   ========================================================================== */
.project-detail-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s;
}

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

.project-detail-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 8, 12, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.project-detail-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 1020px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1.5px solid var(--accent-cyan);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9), 0 0 40px rgba(56, 189, 248, 0.25);
  transform: scale(0.94) translateY(12px);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-detail-overlay.active .project-detail-container {
  transform: scale(1) translateY(0);
}

.project-detail-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 20;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.project-detail-close-btn:hover {
  background: #EF4444;
  border-color: #EF4444;
  color: #FFFFFF;
  transform: scale(1.04);
}

.project-modal-body {
  padding: 0;
}

.project-card.full-detail-card {
  background: transparent;
  border: none;
  box-shadow: none;
}

.project-card-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

@media (min-width: 900px) {
  .project-card-layout.with-media {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.project-details {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.project-num-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-gold);
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.3;
}

.project-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.project-block-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-cyan);
}

.project-block-text {
  font-size: 0.92rem;
  color: #CBD5E1;
  line-height: 1.65;
}

/* Stack Chips */
.stack-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.stack-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-surface-2);
  border: 1px solid rgba(56, 189, 248, 0.2);
  color: #93C5FD;
  padding: 4px 9px;
  border-radius: 4px;
}

/* Result highlight box */
.result-box {
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

.result-box .project-block-title {
  color: #34D399;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}

.btn-project-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  transition: all 0.2s ease;
}

.btn-project-link:hover {
  background: var(--bg-surface-3);
  border-color: var(--accent-cyan);
  color: #FFFFFF;
}

.btn-project-link.primary-action {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.35);
  color: var(--accent-cyan);
}

.btn-project-link.primary-action:hover {
  background: var(--accent-cyan);
  color: #070D17;
}

/* Media / Video Embed Section */
.project-media {
  background: var(--bg-surface-1);
  border-left: 1px solid var(--border-subtle);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 280px;
}

@media (max-width: 899px) {
  .project-media {
    border-left: none;
    border-top: 1px solid var(--border-subtle);
  }
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.video-thumbnail {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.video-thumbnail:hover {
  transform: scale(1.02);
}

.video-play-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(7, 13, 23, 0.45);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background 0.2s ease;
}

.video-thumbnail:hover .video-play-overlay {
  background: rgba(7, 13, 23, 0.25);
}

.play-circle {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.95);
  color: #070D17;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.6);
  transition: transform 0.2s ease;
}

.video-thumbnail:hover .play-circle {
  transform: scale(1.12);
  background: #FFFFFF;
}

.play-caption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: #FFFFFF;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
  background: rgba(0, 0, 0, 0.6);
  padding: 3px 8px;
  border-radius: 4px;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ==========================================================================
   PUBLICATIONS SECTION
   ========================================================================== */
.citation-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  position: relative;
}

.citation-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.citation-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(196, 154, 60, 0.12);
  border: 1px solid rgba(196, 154, 60, 0.4);
  color: #FCD34D;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
}

.citation-content {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.75;
  color: #E2E8F0;
  background: var(--bg-surface-1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 18px;
}

.citation-author-highlight {
  color: var(--accent-gold);
  font-weight: 700;
}

.citation-title-highlight {
  color: #FFFFFF;
  font-weight: 700;
}

.citation-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.citation-doi {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  font-weight: 600;
}

.citation-doi:hover {
  text-decoration: underline;
}

.citation-actions {
  display: flex;
  gap: 10px;
}

/* ==========================================================================
   AWARDS & RECOGNITION SECTION (Responsive Card Grid / Subplot Layout)
   ========================================================================== */
.awards-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 992px) {
  .awards-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .awards-list {
    grid-template-columns: 1fr;
  }
}

.award-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.25s ease;
  height: 100%;
}

.award-item:hover {
  border-color: var(--border-gold);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.6);
}

.award-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(196, 154, 60, 0.12);
  border: 1px solid rgba(196, 154, 60, 0.3);
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.award-text {
  font-size: 0.95rem;
  color: #E2E8F0;
  line-height: 1.6;
}

.award-text strong {
  color: #FFFFFF;
  display: block;
  margin-bottom: 6px;
}

/* ==========================================================================
   PROFESSIONAL EXPERIENCE SECTION
   ========================================================================== */
.exp-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  position: relative;
}

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

.exp-company {
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
}

.exp-role {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-cyan);
  margin-top: 2px;
}

.exp-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.exp-desc {
  font-size: 0.95rem;
  color: #CBD5E1;
  line-height: 1.7;
}

/* ==========================================================================
   EDUCATION SECTION
   ========================================================================== */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.2s ease;
}

.edu-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
}

.edu-institution {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.edu-degree {
  font-size: 1.2rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.3;
}

.edu-meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.edu-specialization {
  font-size: 0.9rem;
  color: #CBD5E1;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  margin-top: 4px;
}

/* ==========================================================================
   CONTACT / FOOTER SECTION
   ========================================================================== */
.contact-section {
  padding: 80px 0 48px;
  background: linear-gradient(180deg, var(--bg-core) 0%, #040810 100%);
  border-top: 1px solid var(--border-subtle);
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
  margin-bottom: 48px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 28px;
}

.contact-link-card {
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.2s ease;
}

.contact-link-card:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-surface-3);
  transform: translateY(-2px);
}

.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-info-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-top: 2px;
  word-break: break-all;
}

.site-footer {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
}

/* ==========================================================================
   MODALS & POPUPS
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
  transform: scale(0.95);
  transition: transform 0.25s ease;
  position: relative;
}

.modal-overlay.open .modal-box {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--text-dim);
  padding: 6px;
  font-size: 1.2rem;
  line-height: 1;
}

.modal-close:hover {
  color: #FFFFFF;
}

/* Toast notifications */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--accent-cyan);
  color: #070D17;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 1000;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.25s ease;
  pointer-events: none;
}

.toast-msg.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   RESPONSIVE DESIGN BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(7, 13, 23, 0.98);
    border-bottom: 1px solid var(--border-subtle);
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    display: none;
    backdrop-filter: blur(16px);
  }

  .nav-menu.open {
    display: flex;
  }

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

  .section {
    padding: 54px 0;
  }

  .about-card,
  .exp-card,
  .citation-card,
  .contact-card {
    padding: 24px 18px;
  }
}