:root {
  --bg: #0a0a0a;
  --bg-elev: #111111;
  --bg-elev-2: #161616;
  --border: #1f1f1f;
  --text: #e6e6e6;
  --text-dim: #9a9a9a;
  --accent: #00ff9d;
  --accent-dim: #00ff9d22;
  --radius: 12px;
  --max: 1180px;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(0, 255, 157, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(0, 255, 157, 0.05), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ---------- scroll progress ---------- */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), #00d4ff);
  z-index: 20;
  transition: width 0.05s linear;
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(10, 10, 10, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  50% {
    box-shadow: 0 0 20px var(--accent);
    transform: scale(1.15);
  }
}

.nav nav {
  display: flex;
  gap: 1.75rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.nav nav a {
  position: relative;
  padding: 0.25rem 0;
}

.nav nav a.active {
  color: var(--accent);
}

.nav nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ---------- layout ---------- */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0 3rem;
  border-top: 1px solid var(--border);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 1rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95rem;
}

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- hero ---------- */
.hero {
  padding: 6rem 0 5rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.9rem;
  margin: 0 0 1.25rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 4rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.accent {
  color: var(--accent);
}

.lede {
  color: var(--text-dim);
  max-width: 38rem;
  font-size: 1.05rem;
  margin: 0 0 2rem;
}

.cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent);
  color: var(--bg);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.tags span {
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
}

/* ---------- hero code card ---------- */
.hero-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 60px rgba(0, 255, 157, 0.05);
  overflow: hidden;
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-elev-2);
  border-bottom: 1px solid var(--border);
}

.bubble {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.bubble.red {
  background: #ff5f57;
}
.bubble.yellow {
  background: #febc2e;
}
.bubble.green {
  background: #28c840;
}

.hero-card-title {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.hero-card pre {
  margin: 0;
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-dim);
  overflow-x: auto;
}

.c-key {
  color: #c678dd;
}
.c-var {
  color: #61afef;
}
.c-prop {
  color: #e06c75;
}
.c-str {
  color: var(--accent);
}
.c-bool {
  color: #d19a66;
}

/* ---------- stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1rem 0 3rem;
  padding: 2rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.stats h3 {
  font-size: 2.25rem;
  margin: 0;
  color: var(--accent);
  font-weight: 700;
}

.stats h3 span {
  font-size: 1.25rem;
  color: var(--text-dim);
}

.stats p {
  margin: 0.25rem 0 0;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

/* ---------- about ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-grid p {
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.facts {
  list-style: none;
  padding: 1.25rem;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.facts li {
  padding: 0.5rem 0;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.facts li:last-child {
  border-bottom: none;
}

.facts span {
  display: block;
  color: var(--text-dim);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

/* ---------- services ---------- */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.svc {
  padding: 1.75rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.svc:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.svc-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
}

.svc h3 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}

.svc p {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin: 0;
}

/* ---------- experience ---------- */
.exp {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

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

.exp h3 {
  font-size: 1.15rem;
  margin: 0 0 0.25rem;
}

.meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
}

.exp ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-dim);
}

.exp li {
  padding: 0.3rem 0;
}

.exp li::marker {
  color: var(--accent);
}

/* ---------- projects ---------- */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

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

.card > header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.card h3 {
  font-size: 1.15rem;
  margin: 0;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.card-sub {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.card > p {
  color: var(--text-dim);
  font-size: 0.95rem;
  flex: 1;
  margin: 0 0 1rem;
}

.stack {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.stack li::before {
  content: "▹ ";
  color: var(--accent);
}

.links {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
  font-family: var(--font-mono);
}

/* ---------- skills ---------- */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.skills h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-family: var(--font-mono);
  margin-bottom: 0.75rem;
}

.skills ul {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--text-dim);
}

.skills li {
  padding: 0.3rem 0;
  font-size: 0.95rem;
}

.skills li::before {
  content: "▹ ";
  color: var(--accent);
}

/* ---------- now ---------- */
.now {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.now-card {
  padding: 1.5rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.now-card h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

.now-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* ---------- education & certs ---------- */
.edu-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
}

.edu-grid h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
}

.edu {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  margin-bottom: 1rem;
}

.edu h3 {
  font-size: 1rem;
  margin: 0 0 0.25rem;
}

.grade {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin: 0;
}

.certs {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--text-dim);
}

.certs li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.certs li:last-child {
  border-bottom: none;
}

.certs li::before {
  content: "▹ ";
  color: var(--accent);
}

.certs span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ---------- contact ---------- */
.contact {
  text-align: center;
  padding: 6rem 0;
}

.contact h2 {
  justify-content: center;
}

.contact .lede {
  margin: 0 auto 2rem;
}

.contact .btn-primary {
  margin-bottom: 2.5rem;
}

.socials {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* ---------- back to top ---------- */
.to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--bg);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.1rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all 0.2s ease;
  z-index: 15;
  box-shadow: 0 8px 24px rgba(0, 255, 157, 0.25);
}

.to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.to-top:hover {
  transform: translateY(-2px);
  color: var(--bg);
}

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 4rem 0;
  }

  .hero-card {
    order: -1;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .nav {
    padding: 1rem;
  }

  .nav nav {
    gap: 1rem;
    font-size: 0.85rem;
  }

  main {
    padding: 0 1.25rem;
  }

  .about-grid,
  .edu-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .section {
    padding: 4rem 0 2rem;
  }

  .hero {
    padding: 3rem 0;
  }

  .stats {
    padding: 1.5rem;
  }

  .stats h3 {
    font-size: 1.75rem;
  }

  .hero-card pre {
    font-size: 0.75rem;
    padding: 1rem;
  }
}