/* ============================================
   DESIGN TOKENS & CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Colors */
  --bg-primary: #06080f;
  --bg-secondary: #0c1020;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(12, 16, 32, 0.7);

  --text-primary: #e8ecf4;
  --text-secondary: #8892a8;
  --text-muted: #5a6478;

  --accent-cyan: #22d3ee;
  --accent-violet: #8b5cf6;
  --accent-indigo: #6366f1;
  --accent-pink: #ec4899;
  --accent-emerald: #34d399;

  --gradient-primary: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0c1020 100%);
  --gradient-card-border: linear-gradient(135deg, rgba(34, 211, 238, 0.3), rgba(139, 92, 246, 0.3));

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-padding: 120px 0;
  --container-width: 1140px;
  --container-padding: 0 24px;

  /* Effects */
  --glass-blur: 20px;
  --card-radius: 16px;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow-cyan: 0 0 40px rgba(34, 211, 238, 0.15);
  --shadow-glow-violet: 0 0 40px rgba(139, 92, 246, 0.15);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 4px;
}

ul, ol {
  list-style: none;
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent-cyan);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 48px;
  line-height: 1.2;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-base);
}

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

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

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.nav-logo .logo-dot {
  color: var(--accent-cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-base);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
  border-radius: 1px;
}

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

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

.nav-resume-btn {
  padding: 8px 20px;
  border: 1px solid var(--accent-cyan);
  border-radius: 8px;
  color: var(--accent-cyan) !important;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  transition: all var(--transition-base);
}

.nav-resume-btn::after {
  display: none !important;
}

.nav-resume-btn:hover {
  background: rgba(34, 211, 238, 0.1);
  box-shadow: var(--shadow-glow-cyan);
}

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
  border: 0;
  background: transparent;
}

.nav-hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO SECTION
   ============================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  opacity: 0;
  animation: fadeInUp 0.6s 0.3s forwards;
}

.hero-greeting span {
  color: var(--accent-violet);
  margin: 0 6px;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 7vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
  opacity: 0;
  animation: fadeInUp 0.6s 0.5s forwards;
}

.hero-tagline {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInUp 0.6s 0.7s forwards;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 700px;
  line-height: 1.8;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInUp 0.6s 0.9s forwards;
}

.hero-proof {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
  opacity: 0;
  animation: fadeInUp 0.6s 1s forwards;
}

.hero-proof span {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid rgba(34, 211, 238, 0.14);
  border-radius: 999px;
  background: rgba(6, 8, 15, 0.28);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  backdrop-filter: blur(10px);
}

.hero-proof strong {
  color: var(--text-primary);
  font-size: 0.82rem;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.6s 1.15s forwards;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-primary);
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-violet), var(--accent-cyan));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(34, 211, 238, 0.3);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary span {
  position: relative;
  z-index: 1;
}

.btn-primary i {
  position: relative;
  z-index: 1;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 12px;
  border: 1px solid var(--border-hover);
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.hero-social {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 48px;
  opacity: 0;
  animation: fadeInUp 0.6s 1.35s forwards;
}

.hero-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition-base);
}

.hero-social a:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-cyan);
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: float 3s ease-in-out infinite;
}

.scroll-indicator span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.scroll-mouse::after {
  content: '';
  width: 3px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollDot 2s infinite;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
#about {
  padding: var(--section-padding);
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}

.about-image-wrapper {
  position: relative;
}

.about-image-wrapper::before {
  content: '';
  position: absolute;
  inset: -3px;
  background: var(--gradient-primary);
  border-radius: 20px;
  opacity: 0.6;
  z-index: 0;
}

.about-image-wrapper::after {
  content: '';
  position: absolute;
  top: 20px;
  left: 20px;
  right: -20px;
  bottom: -20px;
  border: 2px solid var(--border-subtle);
  border-radius: 20px;
  z-index: -1;
  transition: all var(--transition-base);
}

.about-image-wrapper:hover::after {
  top: 14px;
  left: 14px;
}

.about-image {
  position: relative;
  z-index: 1;
  width: 100%;
  border-radius: 18px;
  aspect-ratio: 1;
  object-fit: cover;
}

.about-text h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================
   TARGET ROLE FIT
   ============================================ */
#focus {
  padding: var(--section-padding);
  position: relative;
  background: var(--bg-secondary);
}

#focus::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.focus-card {
  position: relative;
  min-height: 100%;
  padding: 34px;
  overflow: hidden;
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--card-radius);
  background:
    radial-gradient(circle at 100% 0%, rgba(139, 92, 246, 0.13), transparent 38%),
    var(--bg-card);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.focus-card::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-violet), transparent);
}

.focus-card-backend {
  border-color: rgba(34, 211, 238, 0.2);
  background:
    radial-gradient(circle at 100% 0%, rgba(34, 211, 238, 0.11), transparent 38%),
    var(--bg-card);
}

.focus-card-backend::after {
  background: linear-gradient(180deg, var(--accent-cyan), transparent);
}

.focus-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}

.focus-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.focus-card-top > i {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-violet);
  font-size: 1.25rem;
}

.focus-card-backend .focus-card-top > i {
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
}

.focus-index {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 2px;
}

.focus-eyebrow {
  margin-bottom: 5px;
  color: var(--accent-violet);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.focus-card-backend .focus-eyebrow {
  color: var(--accent-cyan);
}

.focus-card h3 {
  margin-bottom: 12px;
  font-size: 1.45rem;
}

.focus-card > p:not(.focus-eyebrow) {
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.focus-evidence {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 24px 0;
}

.focus-evidence li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.focus-evidence i {
  margin-top: 5px;
  color: var(--accent-emerald);
  font-size: 0.7rem;
}

.focus-tags,
.timeline-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.focus-tags span,
.timeline-highlights span {
  padding: 5px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.69rem;
}

.shared-foundation {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 24px;
  padding: 18px 24px;
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.shared-foundation span {
  flex-shrink: 0;
  color: var(--accent-emerald);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.shared-foundation p {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
#experience {
  padding: var(--section-padding);
  background: var(--bg-primary);
  position: relative;
}

#experience::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
}

.timeline {
  position: relative;
  max-width: 940px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-violet), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 72px;
  padding-bottom: 48px;
}

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

.timeline-dot {
  position: absolute;
  left: 14px;
  top: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  z-index: 1;
  transition: all var(--transition-base);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 28px 32px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.timeline-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.timeline-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateX(8px);
  box-shadow: var(--shadow-card);
}

.timeline-card:hover::before {
  opacity: 1;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  white-space: nowrap;
  padding: 4px 12px;
  background: rgba(34, 211, 238, 0.08);
  border-radius: 6px;
  border: 1px solid rgba(34, 211, 238, 0.15);
}

.timeline-company {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.timeline-highlights {
  margin: 18px 0;
}

.timeline-bullets {
  list-style: none;
}

.timeline-bullets li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.timeline-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
  font-size: 0.9rem;
}

.timeline-bullets li strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
#skills {
  padding: var(--section-padding);
  position: relative;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 32px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  border-radius: 0 4px 4px 0;
  transition: all var(--transition-base);
}

.skill-category:nth-child(1)::before { background: var(--accent-cyan); }
.skill-category:nth-child(2)::before { background: var(--accent-violet); }
.skill-category:nth-child(3)::before { background: var(--accent-emerald); }
.skill-category:nth-child(4)::before { background: var(--accent-pink); }

.skill-category:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.skill-category-icon {
  font-size: 1.6rem;
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(34, 211, 238, 0.08);
}

.skill-category:nth-child(1) .skill-category-icon { color: var(--accent-cyan); background: rgba(34, 211, 238, 0.08); }
.skill-category:nth-child(2) .skill-category-icon { color: var(--accent-violet); background: rgba(139, 92, 246, 0.08); }
.skill-category:nth-child(3) .skill-category-icon { color: var(--accent-emerald); background: rgba(52, 211, 153, 0.08); }
.skill-category:nth-child(4) .skill-category-icon { color: var(--accent-pink); background: rgba(236, 72, 153, 0.08); }

.skill-category-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

.skill-tag {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.skill-tag:hover {
  background: rgba(34, 211, 238, 0.08);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
#projects {
  padding: var(--section-padding);
  background: var(--bg-secondary);
  position: relative;
}

#projects::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 32px;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--card-radius);
  padding: 1px;
  background: var(--gradient-card-border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.project-card:hover::before {
  opacity: 1;
}

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

.project-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  border: 1px solid rgba(139, 92, 246, 0.18);
  border-radius: 7px;
  background: rgba(139, 92, 246, 0.08);
  color: var(--accent-violet);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.project-badge-backend {
  border-color: rgba(34, 211, 238, 0.18);
  background: rgba(34, 211, 238, 0.08);
  color: var(--accent-cyan);
}

.project-badge-cloud {
  border-color: rgba(52, 211, 153, 0.18);
  background: rgba(52, 211, 153, 0.08);
  color: var(--accent-emerald);
}

.project-badge-ml {
  border-color: rgba(236, 72, 153, 0.18);
  background: rgba(236, 72, 153, 0.08);
  color: var(--accent-pink);
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-links a {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: all var(--transition-base);
}

.project-links a:hover {
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.project-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-primary);
  transition: color var(--transition-base);
}

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

.project-subtitle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-violet);
  margin-bottom: 12px;
}

.project-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 20px;
  line-height: 1.7;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.project-tech span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
}

/* ============================================
   PUBLICATIONS SECTION
   ============================================ */
#publications {
  padding: var(--section-padding);
  position: relative;
}

.publications-list {
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.publication-card {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  transition: all var(--transition-base);
  position: relative;
}

.publication-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateX(8px);
  box-shadow: var(--shadow-card);
}

.publication-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.15);
  white-space: nowrap;
  flex-shrink: 0;
}

.publication-info h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 1.5;
}

.publication-info h4 a {
  transition: color var(--transition-base);
}

.publication-info h4 a:hover {
  color: var(--accent-cyan);
}

.publication-venue {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

.publication-venue .ieee-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-style: normal;
  font-weight: 600;
  color: var(--accent-violet);
  font-size: 0.78rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
#contact {
  padding: var(--section-padding);
  background: var(--bg-secondary);
  position: relative;
  text-align: center;
}

#contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
}

.contact-content p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent-cyan);
  padding: 16px 36px;
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 12px;
  transition: all var(--transition-base);
  margin-bottom: 48px;
}

.contact-email:hover {
  background: rgba(34, 211, 238, 0.08);
  box-shadow: var(--shadow-glow-cyan);
  transform: translateY(-2px);
}

.contact-social {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.contact-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-base);
}

.contact-social a:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-cyan);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 32px 0;
  text-align: center;
  border-top: 1px solid var(--border-subtle);
}

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

.footer a {
  color: var(--accent-cyan);
  transition: color var(--transition-base);
}

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

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes scrollDot {
  0% { opacity: 1; top: 6px; }
  100% { opacity: 0; top: 20px; }
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 968px) {
  .about-grid {
    grid-template-columns: 200px 1fr;
    gap: 40px;
  }

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

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

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

@media (max-width: 860px) {
  :root {
    --section-padding: 80px 0;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    padding: 40px;
    border-left: 1px solid var(--border-subtle);
    transition: right var(--transition-base);
    gap: 24px;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-hamburger {
    display: flex;
  }

  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-image-wrapper {
    max-width: 200px;
    margin: 0 auto;
  }

  .about-image-wrapper::after {
    display: none;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .shared-foundation {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .timeline::before {
    left: 14px;
  }

  .timeline-item {
    padding-left: 48px;
  }

  .timeline-dot {
    left: 5px;
    width: 20px;
    height: 20px;
  }

  .timeline-header {
    flex-direction: column;
  }

  .timeline-card {
    padding: 20px 24px;
  }

  .publication-card {
    flex-direction: column;
    gap: 12px;
    padding: 20px 24px;
  }

  .hero-name {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-tagline {
    font-size: clamp(1.2rem, 4vw, 1.8rem);
  }

  .scroll-indicator {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-proof {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-proof span {
    width: 100%;
  }

  .focus-card {
    padding: 26px 24px;
  }

  .about-stats {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: left;
  }

  .contact-email {
    width: 100%;
    justify-content: center;
    padding: 12px 16px;
    font-size: 0.78rem;
  }

  .section-title {
    font-size: 1.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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