/* ── tokens ─────────────────────────────────────────────────────── */
:root {
  --void:   #05070d;
  --panel:  #0b1220;
  --panel2: #0e1728;
  --line:   #16233a;
  --text:   #e6f1ff;
  --muted:  #7d8ba1;
  --cyan:   #00d4ff;
  --blue:   #1e6fff;
  --ok:     #2ee6a8;
  --glow:   0 0 24px rgba(0, 212, 255, .35);
  --mono:   "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans:   "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --rail-w: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--void);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

::selection { background: rgba(0, 212, 255, .25); }

/* ── ambient layers ─────────────────────────────────────────────── */
.grid-bg {
  position: fixed; inset: -50%;
  background-image:
    linear-gradient(rgba(30, 111, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 111, 255, .07) 1px, transparent 1px);
  background-size: 56px 56px;
  animation: drift 24s linear infinite;
  z-index: 0; pointer-events: none;
  mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 72%);
}
@keyframes drift { to { transform: translate(56px, 56px); } }

.scanlines {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: repeating-linear-gradient(
    to bottom, transparent 0 3px, rgba(0, 212, 255, .022) 3px 4px);
}

.cursor-glow {
  position: fixed; top: 0; left: 0; width: 480px; height: 480px;
  margin: -240px 0 0 -240px; border-radius: 50%; z-index: 0;
  background: radial-gradient(circle, rgba(0, 212, 255, .10), transparent 62%);
  pointer-events: none; transition: opacity .3s; opacity: 0;
}

/* ── boot ───────────────────────────────────────────────────────── */
.boot {
  position: fixed; inset: 0; z-index: 100;
  background: var(--void);
  display: grid; place-items: center;
  transition: opacity .5s ease, visibility .5s;
}
.boot.done { opacity: 0; visibility: hidden; }
.boot-inner { width: min(520px, 84vw); }
.boot-log {
  font-family: var(--mono); font-size: .78rem; color: var(--cyan);
  margin: 0 0 1rem; min-height: 21em; white-space: pre-wrap;
}
.boot-log::after {
  content: "▋"; animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.boot-bar { height: 2px; background: var(--line); overflow: hidden; }
.boot-bar span {
  display: block; height: 100%; width: 0; background: var(--cyan);
  box-shadow: var(--glow); transition: width .3s ease;
}
.boot-skip {
  margin-top: .9rem; font-family: var(--mono); font-size: .62rem;
  letter-spacing: .12em; color: var(--muted); text-align: right;
}

/* ── HUD rail ───────────────────────────────────────────────────── */
.rail {
  position: fixed; left: 0; top: 50%; transform: translateY(-50%);
  width: var(--rail-w); z-index: 40;
}
.rail ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.15rem; }
.rail a {
  display: flex; align-items: center; gap: .6rem;
  padding-left: 22px; text-decoration: none; position: relative;
}
.rail .node {
  width: 7px; height: 7px; border: 1px solid var(--muted);
  transform: rotate(45deg); transition: all .25s;
}
.rail a::after {
  content: attr(data-label);
  font-family: var(--mono); font-size: .58rem; letter-spacing: .14em;
  color: var(--muted); opacity: 0; transform: translateX(-6px);
  transition: all .25s; white-space: nowrap;
}
.rail a:hover::after { opacity: 1; transform: none; }
.rail a:hover .node { border-color: var(--cyan); }
.rail a.on .node { background: var(--cyan); border-color: var(--cyan); box-shadow: var(--glow); }
.rail a.on::after { opacity: 1; transform: none; color: var(--cyan); }

/* ── status bar ─────────────────────────────────────────────────── */
.statusbar {
  position: fixed; top: 0; left: 0; right: 0; height: 46px; z-index: 45;
  display: flex; align-items: center; gap: 1rem; padding: 0 1.1rem;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .08em;
  background: rgba(5, 7, 13, .72); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.sb-id { color: var(--text); }
.sb-dim, .sb-item { color: var(--muted); }
.sb-spacer { flex: 1; }
.sb-key {
  background: none; border: 1px solid var(--line); color: var(--muted);
  padding: .25rem .5rem; cursor: pointer; font: inherit; transition: all .2s;
}
.sb-key:hover { border-color: var(--cyan); color: var(--cyan); }
kbd {
  font-family: var(--mono); font-size: .95em; color: inherit;
  padding: 0 .15rem;
}

/* ── layout ─────────────────────────────────────────────────────── */
main { position: relative; z-index: 2; }
.sec {
  max-width: 880px;
  margin: 0 auto;
  padding: 7rem 1.5rem 4rem;
  padding-left: calc(var(--rail-w) + 1.5rem);
}
.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; }

h1 {
  font-family: var(--mono); font-weight: 700;
  font-size: clamp(2.1rem, 7vw, 4.1rem);
  letter-spacing: -.02em; line-height: 1.05; margin: .3rem 0 1rem;
}
h2 {
  font-family: var(--mono); font-size: 1.05rem; font-weight: 500;
  letter-spacing: .28em; color: var(--cyan); margin: 0 0 .35rem;
}
h2::before { content: "// "; color: var(--muted); }
h3 { font-size: 1.12rem; margin: 0 0 .7rem; line-height: 1.35; }
h4 { font-family: var(--mono); font-size: .8rem; letter-spacing: .1em;
     color: var(--cyan); margin: 0 0 .6rem; text-transform: uppercase; }

.eyebrow, .sec-note {
  font-family: var(--mono); font-size: .75rem; color: var(--muted);
  letter-spacing: .1em; margin: 0 0 2.2rem;
}
.eyebrow { margin-bottom: .5rem; color: var(--cyan); }
.lede { color: var(--muted); max-width: 56ch; font-size: 1.02rem; }
.dim { color: var(--muted); }
.hint { font-family: var(--mono); font-size: .72rem; color: var(--muted); margin-top: 2.5rem; }

.role { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 1.6rem; }
.tag {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; padding: .3rem .65rem;
  border: 1px solid var(--line); color: var(--muted);
}

/* ── hero stats ─────────────────────────────────────────────────── */
.hero-stats { display: flex; flex-wrap: wrap; gap: 2.4rem; margin-top: 2.6rem; }
.stat b {
  display: block; font-family: var(--mono); font-size: 2rem;
  color: var(--cyan); text-shadow: var(--glow); line-height: 1;
}
.stat span {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .14em;
  color: var(--muted); text-transform: uppercase;
}

/* ── cards ──────────────────────────────────────────────────────── */
.card {
  position: relative; background: var(--panel);
  border: 1px solid var(--line); padding: 1.6rem;
  margin-bottom: 1.1rem; transition: border-color .3s, transform .3s, box-shadow .3s;
}
.card::before {
  content: ""; position: absolute; top: -1px; left: -1px;
  width: 12px; height: 12px;
  border-top: 1px solid var(--cyan); border-left: 1px solid var(--cyan);
  opacity: 0; transition: opacity .3s;
}
.card:hover { border-color: rgba(0, 212, 255, .4); transform: translateY(-2px);
              box-shadow: 0 10px 40px -20px rgba(0, 212, 255, .5); }
.card:hover::before { opacity: 1; }

.card-tag {
  position: absolute; top: -1px; right: -1px;
  font-family: var(--mono); font-size: .6rem; letter-spacing: .16em;
  background: var(--blue); color: #fff; padding: .2rem .55rem;
}
.research h3 { padding-right: 5rem; }

.meta { display: flex; flex-wrap: wrap; gap: 1.6rem; margin: 0 0 1rem; }
.meta div { display: flex; flex-direction: column; }
.meta dt { font-family: var(--mono); font-size: .6rem; letter-spacing: .14em;
           color: var(--muted); text-transform: uppercase; }
.meta dd { margin: 0; font-family: var(--mono); font-size: .82rem; }
.meta .ok { color: var(--ok); }

.card p { margin: 0 0 1rem; color: var(--muted); font-size: .95rem; }
.card em { color: #5d6b82; font-style: normal; font-size: .85em; }

.byline {
  font-family: var(--mono); font-size: .74rem;
  padding-top: .2rem; border-top: 1px solid var(--line);
}
.byline b { color: var(--cyan); font-weight: 500; }

.links { display: flex; flex-wrap: wrap; gap: 1.1rem; }
.lnk {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .06em;
  color: var(--cyan); text-decoration: none; border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.lnk:hover { border-color: var(--cyan); }
.btn {
  display: inline-block; font-family: var(--mono); font-size: .74rem;
  letter-spacing: .1em; text-decoration: none; color: var(--void);
  background: var(--cyan); padding: .55rem 1.1rem; transition: box-shadow .25s;
}
.btn:hover { box-shadow: var(--glow); }

/* ── filters + grid ─────────────────────────────────────────────── */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.4rem; }
.chip {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .12em;
  background: none; border: 1px solid var(--line); color: var(--muted);
  padding: .35rem .8rem; cursor: pointer; transition: all .2s;
}
.chip:hover { border-color: var(--cyan); color: var(--cyan); }
.chip.is-on { background: var(--cyan); border-color: var(--cyan); color: var(--void); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.1rem; }
.grid .card { margin: 0; }
.card.hide { display: none; }

.stack-tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1rem; }
.stack-tags span {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .08em;
  color: var(--muted); border: 1px solid var(--line); padding: .18rem .45rem;
}

.skel { color: var(--muted); font-family: var(--mono); font-size: .8rem; }
.repo-stats { display: flex; gap: 1.1rem; font-family: var(--mono);
              font-size: .7rem; color: var(--muted); }

/* ── stack cols ─────────────────────────────────────────────────── */
.stack-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1.8rem; margin-top: 2rem; }
.stack-cols ul { list-style: none; margin: 0; padding: 0; }
.stack-cols li {
  font-family: var(--mono); font-size: .82rem; color: var(--muted);
  padding: .28rem 0; border-bottom: 1px solid var(--line);
}

/* ── timeline ───────────────────────────────────────────────────── */
.tl { list-style: none; margin: 2rem 0 0; padding: 0 0 0 1.6rem; border-left: 1px solid var(--line); }
.tl li { position: relative; padding: 0 0 2rem .6rem; }
.tl li::before {
  content: ""; position: absolute; left: calc(-1.6rem - 4px); top: .55rem;
  width: 7px; height: 7px; background: var(--cyan); transform: rotate(45deg);
  box-shadow: var(--glow);
}
.tl-year { font-family: var(--mono); font-size: .7rem; color: var(--cyan); letter-spacing: .12em; }
.tl h4 { color: var(--text); font-family: var(--sans); font-size: 1rem;
         letter-spacing: 0; text-transform: none; margin: .2rem 0 .3rem; }
.tl p { margin: 0; color: var(--muted); font-size: .92rem; }

/* ── resume ─────────────────────────────────────────────────────── */
.resume-box { display: grid; grid-template-columns: 1fr; gap: 1.2rem; margin-top: 2rem; }
.resume-meta p { margin: 0 0 .5rem; }
.resume-meta b { font-family: var(--mono); font-size: .85rem; }
.resume-view { width: 100%; height: 520px; border: 1px solid var(--line); background: var(--panel); }
code { font-family: var(--mono); font-size: .85em; color: var(--cyan); }

/* ── contact ────────────────────────────────────────────────────── */
.contact-links { display: flex; flex-wrap: wrap; align-items: center; gap: 1.4rem; margin-top: 2rem; }
footer {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  margin-top: 5rem; padding-top: 1.2rem; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: .7rem; color: var(--muted);
}

/* ── overlays: palette + terminal ───────────────────────────────── */
.overlay {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(5, 7, 13, .78); backdrop-filter: blur(6px);
  display: grid; place-items: start center; padding-top: 14vh;
}
.overlay[hidden] { display: none; }

.palette, .terminal {
  width: min(620px, 92vw); background: var(--panel2);
  border: 1px solid rgba(0, 212, 255, .3);
  box-shadow: 0 30px 80px -30px rgba(0, 212, 255, .4);
  animation: pop .18s ease;
}
@keyframes pop { from { opacity: 0; transform: translateY(-8px); } }

#palette-input {
  width: 100%; background: none; border: 0; border-bottom: 1px solid var(--line);
  color: var(--text); font-family: var(--mono); font-size: .95rem;
  padding: 1rem 1.2rem; outline: none;
}
#palette-list { list-style: none; margin: 0; padding: .4rem; max-height: 46vh; overflow-y: auto; }
#palette-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: .6rem .8rem; font-family: var(--mono); font-size: .82rem;
  color: var(--muted); cursor: pointer;
}
#palette-list li .pl-kind { font-size: .62rem; letter-spacing: .12em; opacity: .6; }
#palette-list li.on, #palette-list li:hover { background: rgba(0, 212, 255, .12); color: var(--cyan); }
.palette-foot {
  border-top: 1px solid var(--line); padding: .5rem 1.2rem;
  font-family: var(--mono); font-size: .62rem; color: var(--muted); letter-spacing: .08em;
}

.term-bar {
  display: flex; align-items: center; gap: .45rem;
  padding: .55rem .9rem; border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: .68rem; color: var(--muted);
}
.term-bar .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.term-bar span:last-child { margin-left: .6rem; }
.term-body {
  font-family: var(--mono); font-size: .8rem; line-height: 1.6;
  padding: .9rem 1rem; height: 46vh; overflow-y: auto; white-space: pre-wrap;
}
.term-body .out { color: var(--muted); }
.term-body .cmd { color: var(--text); }
.term-body .err { color: #ff6b6b; }
.term-input { display: flex; gap: .5rem; align-items: center;
              padding: .6rem 1rem; border-top: 1px solid var(--line); }
.prompt { font-family: var(--mono); font-size: .8rem; color: var(--cyan); }
#term-input {
  flex: 1; background: none; border: 0; outline: none;
  color: var(--text); font-family: var(--mono); font-size: .8rem;
}

/* ── reveal ─────────────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ── responsive ─────────────────────────────────────────────────── */
@media (max-width: 720px) {
  .rail { display: none; }
  .sec { padding-left: 1.5rem; padding-right: 1.5rem; padding-top: 5.5rem; }
  .hero-stats { gap: 1.6rem; }
  .resume-view { height: 380px; }
}

/* ── reduced motion ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .grid-bg { animation: none; }
  .cursor-glow { display: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}