/* Noa Barzelay — cyber-tech variant.
   Deep neutral charcoal, cyan-to-violet gradient system, glass surfaces, grid + glow texture.
   Personal-site backbone: name is the hero, tagline is the subhead. */

:root {
  --bg:        #06070B;
  --bg-2:      #0B0D14;
  --surface:   rgba(255,255,255,0.024);
  --surface-2: rgba(255,255,255,0.04);
  --border:    rgba(255,255,255,0.09);
  --border-2:  rgba(255,255,255,0.14);
  --text:      #E7EAF2;
  --text-2:    #9BA1B4;
  --text-3:    #6B7188;
  --cyan:      #6EE7F5;
  --blue:      #8B9CFF;
  --violet:    #C08CFF;
  --grad:      linear-gradient(115deg, var(--cyan), var(--blue) 52%, var(--violet));
  --glow-cyan: rgba(110,231,245,0.55);
  --glow-vio:  rgba(192,140,255,0.5);
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body:    "Inter", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --maxw: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
::selection { background: rgba(139,156,255,0.28); color: #fff; }

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

/* ---------- background layers ---------- */
.bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; background: var(--bg); }
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 78%);
}
.bg-glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; }
.bg-glow-1 { top: -240px; right: -160px; width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(110,231,245,0.20), transparent 65%); }
.bg-glow-2 { top: 260px; left: -220px; width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(192,140,255,0.16), transparent 65%); }
.bg-vignette { position: absolute; inset: 0;
  background: radial-gradient(130% 100% at 50% -10%, transparent 55%, rgba(0,0,0,0.55)); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: flex-end;
  max-width: var(--maxw); margin: 0 auto; width: 100%;
  padding: 18px 32px;
  background: rgba(6,7,11,0.6);
  backdrop-filter: saturate(150%) blur(12px);
  -webkit-backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.wordmark {
  font-family: var(--font-display); font-size: 15px; font-weight: 600; letter-spacing: -0.01em;
  color: var(--text); display: inline-flex; align-items: center; gap: 10px;
}
.wm-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--grad);
  box-shadow: 0 0 10px var(--glow-cyan); flex: none; }
.nav-links { display: flex; align-items: center; gap: 26px;
  font-family: var(--font-mono); font-size: 13px; color: var(--text-2); }
.nav-links a { transition: color .18s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { color: var(--text) !important; border: 1px solid var(--border-2);
  padding: 6px 14px; border-radius: 7px; transition: border-color .18s, background .18s; }
.nav-cta:hover { border-color: var(--cyan); background: rgba(110,231,245,0.08); }

/* ---------- layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
.block { padding: 74px 0; border-top: 1px solid var(--border); }
.block-head { display: flex; align-items: center; gap: 16px; margin-bottom: 40px; }
.idx { font-family: var(--font-mono); font-size: 13px; color: var(--cyan);
  border: 1px solid var(--border-2); border-radius: 6px; padding: 3px 8px; }
.block-title { font-family: var(--font-display); font-weight: 600; font-size: 24px;
  letter-spacing: -0.01em; }
.rule { flex: 1; height: 1px; background: linear-gradient(90deg, var(--border-2), transparent); }

/* ---------- hero (name-led) ---------- */
.hero { display: grid; grid-template-columns: 1fr 400px; gap: 40px; align-items: center;
  padding: 84px 0 80px; }
.eyebrow { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.14em;
  color: var(--text-2); display: inline-flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.tick { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 8px var(--glow-cyan); animation: pulse 2.6s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
.hero-name { font-family: var(--font-display); font-weight: 600;
  font-size: clamp(46px, 7vw, 82px); line-height: 0.98; letter-spacing: -0.035em;
  margin-bottom: 20px; text-wrap: balance; }
.hero-title { font-family: var(--font-display); font-weight: 400;
  font-size: clamp(18px, 2.2vw, 23px); line-height: 1.32; letter-spacing: -0.01em;
  color: var(--text); max-width: 30ch; margin-bottom: 24px; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text;
  color: transparent; }
.hero-body { font-size: 16px; line-height: 1.66; color: var(--text-2); max-width: 62ch; }
.hero-body a { color: var(--text); border-bottom: 1px solid var(--border-2);
  transition: border-color .18s, color .18s; }
.hero-body a:hover { color: var(--cyan); border-color: var(--cyan); }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.btn { font-family: var(--font-mono); font-size: 13px; color: var(--text);
  border: 1px solid var(--border-2); border-radius: 9px; padding: 11px 18px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: border-color .18s, background .18s, transform .12s, box-shadow .18s; }
.btn:hover { border-color: var(--border-2); background: var(--surface-2); transform: translateY(-1px); }
.btn .ext { color: var(--text-3); }
.btn-primary { position: relative; border-color: transparent; color: #05060a; font-weight: 500;
  background: var(--grad); box-shadow: 0 6px 24px -8px var(--glow-vio); }
.btn-primary:hover { box-shadow: 0 10px 30px -8px var(--glow-cyan); background: var(--grad); }

.hero-visual { display: flex; justify-content: center; align-items: center; }
.fanout { width: 100%; max-width: 400px; height: auto; }
.node { fill: #0B0D14; stroke: var(--blue); stroke-width: 1.4; }
.node-src { fill: var(--cyan); stroke: none; filter: drop-shadow(0 0 6px var(--glow-cyan)); }
.node-out { fill: var(--violet); stroke: none; filter: drop-shadow(0 0 6px var(--glow-vio)); }

/* ---------- project cards ---------- */
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card { position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 26px 26px 22px; overflow: hidden;
  transition: border-color .2s, background .2s, transform .2s; }
.card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: var(--grad); opacity: 0.5; transition: opacity .2s; }
.card:hover { border-color: var(--border-2); background: var(--surface-2); transform: translateY(-3px); }
.card:hover::before { opacity: 1; }
.card-top { display: flex; flex-direction: column; align-items: flex-start; gap: 10px;
  margin-bottom: 14px; }
.card h3 { font-family: var(--font-display); font-weight: 600; font-size: 20px; letter-spacing: -0.01em; }
.taglist { display: flex; flex-wrap: wrap; gap: 6px; }
.pill { font-family: var(--font-mono); font-size: 11px; color: var(--text-2);
  border: 1px solid var(--border); border-radius: 999px; padding: 3px 9px; }
.pill.status { color: var(--cyan); border-color: rgba(110,231,245,0.3); }
.card p { font-size: 14.5px; line-height: 1.6; color: var(--text-2); margin-top: 10px; }
.card-links { display: flex; gap: 20px; margin-top: 18px; font-family: var(--font-mono); font-size: 13px; }
.card-links a { color: var(--cyan); transition: opacity .18s; }
.card-links a:hover { opacity: 0.7; }

/* ---------- writing list ---------- */
.writing-list { list-style: none; }
.writing-list li { border-top: 1px solid var(--border); }
.writing-list li:last-child { border-bottom: 1px solid var(--border); }
.writing-list a { display: block; padding: 22px 16px; border-radius: 10px;
  transition: background .18s; }
.writing-list a:hover { background: var(--surface-2); }
.w-main { display: flex; align-items: baseline; gap: 14px; }
.w-kind { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--text-3);
  border: 1px solid var(--border); border-radius: 5px; padding: 2px 7px; flex: none; }
.w-title { font-family: var(--font-display); font-weight: 500; font-size: 18px; color: var(--text);
  transition: color .18s; }
.writing-list a:hover .w-title { color: var(--cyan); }
.w-prev { font-size: 14px; color: var(--text-2); margin-top: 8px; max-width: 78ch; padding-left: 0; }

/* ---------- now ---------- */
.now-list { list-style: none; font-family: var(--font-mono); font-size: 14.5px; color: var(--text); }
.now-list li { display: flex; gap: 12px; padding: 11px 0; align-items: baseline;
  border-bottom: 1px dashed var(--border); }
.now-list li:last-child { border-bottom: none; }
.prompt { color: var(--cyan); }

/* ---------- experience ---------- */
.timeline { display: grid; gap: 4px; }
.exp { display: grid; grid-template-columns: 132px 1fr; gap: 22px; padding: 16px 0;
  border-bottom: 1px solid var(--border); }
.exp:last-child { border-bottom: none; }
.exp-yr { font-family: var(--font-mono); font-size: 13px; color: var(--text-3);
  font-variant-numeric: tabular-nums; padding-top: 3px; }
.exp-body h3 { font-family: var(--font-display); font-weight: 500; font-size: 16.5px; letter-spacing: -0.01em; }
.exp-body h3 .org { color: var(--cyan); font-weight: 400; }
.exp-body p { font-size: 14px; color: var(--text-2); margin-top: 5px; }
.edu .exp-body h3 { font-size: 15px; color: var(--text); }

/* ---------- footer ---------- */
.foot { max-width: var(--maxw); margin: 0 auto; padding: 54px 32px 80px;
  border-top: 1px solid var(--border); }
.foot-personal { color: var(--text-2); font-size: 15px; max-width: 66ch; }
.foot-row { display: flex; align-items: center; gap: 18px; margin-top: 20px;
  font-family: var(--font-mono); font-size: 13px; color: var(--text-3); flex-wrap: wrap; }
.foot-row a { color: var(--text-2); transition: color .18s; }
.foot-row a:hover { color: var(--cyan); }

/* ---------- reading pages ---------- */
body.reading .article { max-width: 880px; margin: 0 auto; padding: 40px 0 40px; }
.reading main { max-width: 880px; }
.crumb { font-family: var(--font-mono); font-size: 13px; color: var(--text-2); margin-bottom: 34px; }
.crumb a { color: var(--text-2); transition: color .18s; }
.crumb a:hover { color: var(--cyan); }
.crumb-sep { color: var(--text-3); margin: 0 8px; }
.article-eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em;
  color: var(--text-3); display: flex; gap: 10px; align-items: center; margin-bottom: 18px; }
.dotsep { color: var(--text-3); }
.article-title { font-family: var(--font-display); font-weight: 600; font-size: clamp(28px, 4vw, 40px);
  line-height: 1.1; letter-spacing: -0.02em; text-wrap: balance; }
.article-stand { font-size: 18px; line-height: 1.55; color: var(--text-2); margin-top: 20px;
  padding-bottom: 30px; border-bottom: 1px solid var(--border); }
.article-body { margin-top: 34px; }
.article-body p { font-size: 17px; line-height: 1.72; color: #C9CDDA; margin-top: 20px; text-wrap: pretty; }
.article-body p:first-child { margin-top: 0; }
.article-body h2 { font-family: var(--font-display); font-weight: 600; font-size: 21px;
  letter-spacing: -0.01em; margin-top: 48px; color: var(--text);
  padding-left: 14px; border-left: 2px solid transparent; border-image: var(--grad) 1; }
.article-body strong { color: var(--text); font-weight: 600; }
.article-body code { font-family: var(--font-mono); font-size: 0.86em;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px; }
.article-foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 13px; }
.article-foot a { color: var(--text-2); transition: color .18s; }
.article-foot a:hover { color: var(--cyan); }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 16px; top: 12px; z-index: 100; background: var(--bg-2);
  border: 1px solid var(--border-2); padding: 8px 14px; border-radius: 8px; }
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }

/* ---------- entrance motion ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.hero-copy > *, .hero-visual, .card, .block-head { animation: fadeUp .6s ease-out both; }
.hero-copy > *:nth-child(2) { animation-delay: .05s; }
.hero-copy > *:nth-child(3) { animation-delay: .1s; }
.hero-copy > *:nth-child(4) { animation-delay: .15s; }
.hero-copy > *:nth-child(5) { animation-delay: .2s; }
.hero-visual { animation-delay: .24s; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 8px; padding: 60px 0 52px; }
  .hero-visual { display: none; }
  .cards { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .nav { padding: 14px 18px; }
  .nav-links { gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
  main, .foot { padding-left: 18px; padding-right: 18px; }
  .block { padding: 52px 0; }
  .exp { grid-template-columns: 1fr; gap: 4px; }
  .w-main { flex-wrap: wrap; gap: 8px; }
  .article-body p { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto; }
}

/* ---------- other interests ---------- */
.interests { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; }
.int-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 20px; }
.int-list { list-style: none; display: grid; gap: 14px; }
.int-list li { position: relative; padding-left: 20px; font-size: 14.5px; line-height: 1.62; color: var(--text-2); }
.int-list li::before { content: ""; position: absolute; left: 0; top: 9px; width: 6px; height: 6px;
  border-radius: 50%; background: var(--grad); opacity: 0.85; }
.int-list em { color: var(--text); font-style: italic; }
@media (max-width: 700px) { .interests { grid-template-columns: 1fr; gap: 34px; } }

/* ---------- experience + education detail (resume bullets) ---------- */
.exp-loc { display: block; color: var(--text-3); opacity: 0.8; margin-top: 2px; font-size: 12px; }
.exp-context { font-size: 13px; color: var(--text-3); font-style: italic; margin-top: 4px; line-height: 1.5; }
.exp-bullets { list-style: none; display: grid; gap: 8px; margin-top: 12px; }
.exp-bullets li { position: relative; padding-left: 20px; font-size: 14px; line-height: 1.55; color: var(--text-2); }
.exp-bullets li::before { content: ""; position: absolute; left: 0; top: 8px; width: 6px; height: 6px;
  border-radius: 50%; background: var(--grad); opacity: 0.8; }
.exp-group { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); margin: 30px 0 14px; }
.block .exp-group:first-of-type { margin-top: 0; }