/* ═══════════════════════════════════════════════════════════════
   Root & Reset
   ═══════════════════════════════════════════════════════════════ */
:root {
  /* Palette */
  --bg:            #050c1a;
  --bg-section:    #07122a;
  --bg-card:       #0b1d3a;
  --bg-card-hover: #0e2447;
  --border:        rgba(0, 200, 255, 0.12);
  --border-hover:  rgba(0, 200, 255, 0.4);

  /* Accents */
  --cyan:    #00c8ff;
  --blue:    #1e6fff;
  --purple:  #7c3aed;
  --green:   #00e5a0;
  --yellow:  #ffd166;

  /* Text */
  --text-primary:   #e0eeff;
  --text-secondary: #7fa8d4;
  --text-muted:     #3a5878;

  /* Sizes */
  --nav-h:   68px;
  --radius:  12px;
  --radius-sm: 6px;

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img, svg {
  display: block;
}

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

/* ═══════════════════════════════════════════════════════════════
   Navigation
   ═══════════════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  background: transparent;
  transition: background var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(5, 12, 26, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav__logo {
  display: flex;
  align-items: center;
}

.nav__logo-svg {
  width: 40px;
  height: 40px;
  overflow: hidden;
  transition: opacity var(--transition);
}

.nav__logo:hover .nav__logo-svg {
  opacity: 0.85;
}

/* Spinning gradient ring */
.nl-ring { transform-origin: 50% 50%; }
.nl-ring--cw  { animation: nlSpin  6s linear infinite; }
.nl-ring--ccw { animation: nlSpin 10s linear infinite reverse; }
@keyframes nlSpin { to { transform: rotate(360deg); } }

/* Neural network nodes */
.nl-node { animation: nlPulse 3s ease-in-out infinite; }
.nl-node--d1 { animation-delay: -0.75s; }
.nl-node--d2 { animation-delay: -1.5s; }
.nl-node--d3 { animation-delay: -2.25s; }
@keyframes nlPulse {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 0.9; }
}

/* Neural network lines — gentle fade */
.nl-net-line { animation: nlLineFade 4s ease-in-out infinite; }
.nl-net-line--d1 { animation-delay: -1s; }
.nl-net-line--d2 { animation-delay: -2s; }
.nl-net-line--d3 { animation-delay: -3s; }
@keyframes nlLineFade {
  0%, 100% { opacity: 0.1; }
  50%       { opacity: 0.35; }
}

/* Pulsing TL monogram */
.nl-mark { animation: nlGlow 3s ease-in-out infinite; }
@keyframes nlGlow {
  0%, 100% { opacity: 0.8; }
  50%       { opacity: 1; }
}

.nav__links {
  display: flex;
  gap: 2.5rem;
}

.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  position: relative;
  transition: color var(--transition);
}

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

.nav__links a:hover {
  color: var(--cyan);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ═══════════════════════════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 1.5rem;
  max-width: 800px;
}

/* ─── Hero Avatar ─────────────────────────────────────────────── */
.hero__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  position: relative;
}

.hero__avatar::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: conic-gradient(var(--cyan), var(--blue), var(--purple), var(--cyan));
  animation: spinGradient 6s linear infinite;
  z-index: 0;
}

.hero__avatar::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: conic-gradient(var(--cyan), var(--blue), var(--purple), var(--cyan));
  filter: blur(8px);
  opacity: 0.5;
  animation: spinGradient 6s linear infinite;
  z-index: 0;
}

@keyframes spinGradient {
  to { transform: rotate(360deg); }
}

.hero__avatar-img,
.hero__avatar-placeholder {
  position: absolute;
  inset: 3px;
  width: calc(100% - 6px);
  height: calc(100% - 6px);
  border-radius: 50%;
  object-fit: cover;
  z-index: 1;
  background: var(--bg-card);
}

.hero__avatar-placeholder {
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.hero__avatar-placeholder svg {
  width: 60%;
  height: 60%;
}

.hero__greeting {
  font-size: 1.1rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.hero__name {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  background: linear-gradient(135deg, #e0eeff 30%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero__tagline {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--text-secondary);
  min-height: 2rem;
  margin-bottom: 2rem;
}

.typed::after {
  content: '|';
  animation: blink 0.8s step-end infinite;
  color: var(--cyan);
  margin-left: 2px;
}

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

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.badge {
  display: inline-block;
  padding: 0.35em 1em;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid;
  animation: float 4s ease-in-out infinite;
}

.badge--dotnet { color: var(--purple); border-color: var(--purple); background: rgba(124, 58, 237, 0.1); animation-delay: 0s; }
.badge--csharp { color: var(--blue);   border-color: var(--blue);   background: rgba(30, 111, 255, 0.1); animation-delay: 0.3s; }
.badge--cloud  { color: var(--cyan);   border-color: var(--cyan);   background: rgba(0, 200, 255, 0.1); animation-delay: 0.6s; }
.badge--ai     { color: var(--green);  border-color: var(--green);  background: rgba(0, 229, 160, 0.1); animation-delay: 0.9s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.btn {
  display: inline-block;
  padding: 0.85em 2.2em;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  border: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #050c1a;
  box-shadow: 0 0 20px rgba(0, 200, 255, 0.25);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0, 200, 255, 0.5);
}

.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero__scroll-arrow {
  display: block;
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: scrollBounce 1.5s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.4; }
  50%       { transform: rotate(45deg) translateY(6px); opacity: 1; }
}

/* ═══════════════════════════════════════════════════════════════
   Sections shared
   ═══════════════════════════════════════════════════════════════ */
.section {
  padding: clamp(4rem, 8vw, 6rem) 0;
}

.section:nth-child(even) {
  background-color: var(--bg-section);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
}

.section__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text-primary) 60%, var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section__subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1rem;
}

/* ═══════════════════════════════════════════════════════════════
   Skill Cards
   ═══════════════════════════════════════════════════════════════ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  opacity: 0;
  transition: opacity var(--transition);
}

.skill-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 8px 40px rgba(0, 200, 255, 0.12);
}

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

.skill-card__icon {
  width: 3rem;
  height: 3rem;
  margin-bottom: 1.25rem;
}

.skill-card__icon svg {
  width: 100%;
  height: 100%;
}

.skill-card__icon--dotnet { color: var(--purple); }
.skill-card__icon--csharp { color: var(--blue); }
.skill-card__icon--cloud  { color: var(--cyan); }
.skill-card__icon--ai     { color: var(--green); }

.skill-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.skill-card__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.skill-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-card__tags li {
  font-size: 0.75rem;
  padding: 0.2em 0.75em;
  border-radius: var(--radius-sm);
  background: rgba(0, 200, 255, 0.07);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* ═══════════════════════════════════════════════════════════════
   Project Cards
   ═══════════════════════════════════════════════════════════════ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 8px 40px rgba(0, 200, 255, 0.12);
}

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-card__type {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid rgba(0, 200, 255, 0.3);
  padding: 0.2em 0.7em;
  border-radius: var(--radius-sm);
}

.project-card__links {
  display: flex;
  gap: 0.75rem;
}

.project-card__link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: color var(--transition);
}

.project-card__link:hover {
  color: var(--cyan);
}

.project-card__link svg {
  width: 20px;
  height: 20px;
}

.project-card__text-link {
  color: var(--text-muted);
  transition: color var(--transition);
  text-decoration: underline;
}

.project-card__text-link:hover {
  color: var(--cyan);
}

.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
}

.project-card__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  flex: 1;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.25rem;
}

.project-card__tech li {
  font-size: 0.75rem;
  padding: 0.2em 0.75em;
  border-radius: var(--radius-sm);
  background: rgba(30, 111, 255, 0.08);
  color: var(--text-secondary);
  border: 1px solid rgba(30, 111, 255, 0.2);
}

/* ═══════════════════════════════════════════════════════════════
   Social / Contact
   ═══════════════════════════════════════════════════════════════ */
.social__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
}

.social-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 140px;
  color: var(--text-secondary);
  transition: transform var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.social-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  color: var(--cyan);
  box-shadow: 0 8px 30px rgba(0, 200, 255, 0.15);
}

.social-card__icon {
  width: 2rem;
  height: 2rem;
}

.social-card__label {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ═══════════════════════════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════════════════════════ */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ═══════════════════════════════════════════════════════════════
   Animations: fade-in & reveal (scroll)
   ═══════════════════════════════════════════════════════════════ */
.fade-in {
  animation: fadeInUp 0.9s ease both;
}

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

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* stagger children in a grid */
.skills__grid .reveal:nth-child(1) { transition-delay: 0s; }
.skills__grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.skills__grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.skills__grid .reveal:nth-child(4) { transition-delay: 0.3s; }

.projects__grid .reveal:nth-child(1) { transition-delay: 0s; }
.projects__grid .reveal:nth-child(2) { transition-delay: 0.12s; }
.projects__grid .reveal:nth-child(3) { transition-delay: 0.24s; }

/* ═══════════════════════════════════════════════════════════════
   Glow pulse (decorative circles behind sections)
   ═══════════════════════════════════════════════════════════════ */
.skills {
  position: relative;
  overflow: hidden;
}

.skills::before {
  content: '';
  position: absolute;
  top: -200px;
  left: -200px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 111, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.projects::after {
  content: '';
  position: absolute;
  bottom: -200px;
  right: -150px;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.projects {
  position: relative;
  overflow: hidden;
}

/* ═══════════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .nav__links {
    display: none;
    flex-direction: column;
    gap: 1.25rem;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(5, 12, 26, 0.97);
    backdrop-filter: blur(16px);
    padding: 1.5rem clamp(1.5rem, 5vw, 4rem);
    border-bottom: 1px solid var(--border);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__burger {
    display: flex;
  }

  .skills__grid,
  .projects__grid {
    grid-template-columns: 1fr;
  }
}