/* ---------- tokens ---------- */
:root {
  --bg: #0b0e11;
  --surface: #12161b;
  --surface-2: #171c22;
  --border: #232a32;
  --text: #e6e9ed;
  --muted: #8a939e;
  --accent: #5eead4;
  --accent-dim: #2e5e58;
  --amber: #f5a623;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --content-width: 760px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

a { color: inherit; }

::selection { background: var(--accent-dim); color: var(--text); }

/* ---------- circuit trace ---------- */
.trace {
  position: absolute;
  top: 0;
  left: 50%;
  width: 40px;
  height: 100%;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 0;
}

#tracePathBg {
  fill: none;
  stroke: var(--border);
  stroke-width: 1.5;
}

#tracePath {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  filter: drop-shadow(0 0 4px var(--accent-dim));
}

.node {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  z-index: 1;
  top: 0;
}

.node::after {
  content: attr(data-label);
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.node.is-live {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim), 0 0 16px 2px var(--accent);
}

/* ---------- layout shells ---------- */
.nav, .hero, .section, .footer {
  position: relative;
  z-index: 2;
  max-width: var(--content-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  padding-bottom: 28px;
}

.nav__mark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.nav__links {
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  flex-wrap: wrap;
}

.nav__links a {
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav__links a:hover,
.nav__links a:focus-visible {
  color: var(--accent);
}

/* ---------- hero ---------- */
.hero {
  padding-top: 96px;
  padding-bottom: 96px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 20px;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1.08;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.hero__title--dim {
  color: var(--muted);
  font-weight: 500;
}

.hero__sub {
  max-width: 52ch;
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn--primary {
  background: var(--accent);
  color: #06201c;
  font-weight: 500;
}

.btn--primary:hover { transform: translateY(-1px); }

.btn--ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- sections ---------- */
.section {
  padding-top: 72px;
  padding-bottom: 72px;
  border-top: 1px solid var(--border);
}

.section__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 600;
  margin: 0 0 32px;
  max-width: 34ch;
}

/* about */
.about__grid {
  display: grid;
  gap: 20px;
  color: var(--muted);
}

.about__grid em {
  color: var(--text);
  font-style: normal;
  border-bottom: 1px dashed var(--accent-dim);
}

/* projects / experience */
.projects {
  display: grid;
  gap: 20px;
}

.project {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.project:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.project--work {
  background: transparent;
  border-style: dashed;
}

.project__meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 8px;
  border-radius: 4px;
  text-transform: lowercase;
}

.project__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 10px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.project__date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 400;
}

.project__desc {
  color: var(--muted);
  margin: 0 0 16px;
  max-width: 60ch;
}

.project--work .project__desc {
  margin-bottom: 0;
}

.project__video {
  width: 50%;height:200x;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.project__link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.project__link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* stack */
.stack__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 32px;
}

.stack__group h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--amber);
  margin: 0 0 14px;
  text-transform: uppercase;
}

.stack__group ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}

.stack__group li {
  padding-left: 14px;
  position: relative;
}

.stack__group li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.stack__group--full {
  border-top: 1px solid var(--border);
  padding-top: 28px;
}

.stack__inline {
  display: flex !important;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.stack__inline li {
  padding-left: 14px;
}

/* education */
.edu {
  display: grid;
  gap: 24px;
}

.edu__item {
  border-left: 2px solid var(--accent-dim);
  padding-left: 20px;
}

.edu__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.edu__row h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0;
}

.edu__date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
}

.edu__sub {
  color: var(--muted);
  margin: 6px 0 0;
  font-style: italic;
}

/* contact */
.section--contact {
  padding-bottom: 96px;
}

.contact__sub {
  color: var(--muted);
  max-width: 46ch;
  margin: 0 0 32px;
}

.contact__links {
  display: flex;
  gap: 20px 28px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.contact__links a {
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 3px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

/* footer */
.footer {
  padding-top: 32px;
  padding-bottom: 40px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border-top: 1px solid var(--border);
}

/* ---------- responsive ---------- */
@media (max-width: 640px) {
  .trace { display: none; }
  .node { display: none; }
  .nav__links { gap: 14px; }
  .stack__grid { grid-template-columns: 1fr; }
  .project__title { flex-direction: column; align-items: flex-start; gap: 4px; }
}