:root {
  --bg:        #06080b;
  --bg-soft:   #0b0f15;
  --panel:     rgba(13, 18, 26, 0.72);
  --panel-brd: rgba(126, 231, 199, 0.14);
  --ink:       #e6edf3;
  --ink-dim:   #9aa7b4;
  --ink-faint: #5f6b78;
  --accent:    #7ee7c7;   /* phosphor teal */
  --accent-2:  #38bdf8;   /* sky */
  --warn:      #f5c451;
  --err:       #ff6b6b;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* ---------- scrolling log-trace background ---------- */
#logbg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  contain: strict;
}
#logbg pre {
  margin: 0;
  padding: 2rem 3vw;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.85;
  white-space: pre;
  color: var(--ink-faint);
  opacity: 0.34;
  will-change: transform;
  transform: translateY(0);
}
/* token colors inside the log */
.lt-ts   { color: #3f4b57; }
.lt-info { color: var(--accent-2); }
.lt-dbg  { color: #6b7784; }
.lt-warn { color: var(--warn); }
.lt-err  { color: var(--err); }
.lt-ok   { color: var(--accent); }
.lt-tag  { color: var(--accent); }
.lt-hex  { color: #7c9cc4; }

/* overlay: darken + vignette so foreground text stays readable */
#logveil {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(126,231,199,0.06), transparent 55%),
    radial-gradient(140% 120% at 50% 50%, transparent 45%, rgba(6,8,11,0.80) 100%),
    linear-gradient(180deg, rgba(6,8,11,0.46), rgba(6,8,11,0.26) 30%, rgba(6,8,11,0.46));
}

/* ---------- layout scaffolding ---------- */
.wrap { position: relative; z-index: 2; }
.container { width: min(1080px, 92vw); margin: 0 auto; }
section { padding: 7rem 0; }

/* ---------- nav ---------- */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.15rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(6,8,11,0);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, padding .3s ease, backdrop-filter .3s ease;
}
nav.scrolled {
  background: rgba(6,8,11,0.72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding-top: .8rem; padding-bottom: .8rem;
}
.brand { font-family: var(--mono); font-weight: 600; letter-spacing: -.01em; font-size: .95rem; }
.brand .dot { color: var(--accent); }
.navlinks { display: flex; gap: 2rem; font-size: .9rem; color: var(--ink-dim); }
.navlinks a { position: relative; transition: color .2s; }
.navlinks a:hover { color: var(--ink); }
.navlinks a::after {
  content:""; position:absolute; left:0; bottom:-4px; height:1px; width:0; background:var(--accent);
  transition: width .25s ease;
}
.navlinks a:hover::after { width:100%; }
@media (max-width: 680px){ .navlinks { display:none; } }

/* ---------- hero ---------- */
.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding-top: 6rem; }
.status-pill {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--mono); font-size: .78rem; color: var(--ink-dim);
  border: 1px solid rgba(255,255,255,0.09); border-radius: 999px;
  padding: .4rem .85rem; margin-bottom: 1.8rem; width: fit-content;
  background: rgba(13,18,26,0.5); backdrop-filter: blur(6px);
}
.status-pill .led {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 rgba(126,231,199,.7); animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(126,231,199,.55);}
  70%{ box-shadow: 0 0 0 8px rgba(126,231,199,0);}
  100%{ box-shadow: 0 0 0 0 rgba(126,231,199,0);}
}
.hero h1 {
  font-size: clamp(2.6rem, 6.5vw, 5rem);
  font-weight: 800; letter-spacing: -0.035em; line-height: 1.02;
  margin-bottom: 1.4rem;
}
.hero h1 .grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
p .grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede {
  font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--ink-dim);
  max-width: 40ch; margin-bottom: 2.4rem;
}
.hero .lede strong { color: var(--ink); font-weight: 600; }
.cta-row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.btn {
  font-family: var(--mono); font-size: .9rem; font-weight: 500;
  padding: .8rem 1.4rem; border-radius: 10px; transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  display: inline-flex; align-items: center; gap: .55rem;
}
.btn-primary { background: var(--accent); color: #04120d; font-weight: 600; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(126,231,199,.5); }
.btn-ghost { border: 1px solid rgba(255,255,255,0.14); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.scroll-hint {
  margin-top: 4rem; font-family: var(--mono); font-size: .75rem; color: var(--ink-faint);
  display: flex; align-items: center; gap: .6rem;
}
.scroll-hint .bar { width: 34px; height: 1px; background: var(--ink-faint); position: relative; overflow: hidden; }
.scroll-hint .bar::after { content:""; position:absolute; inset:0; width:40%; background:var(--accent); animation: slide 2.2s infinite; }
@keyframes slide { 0%{transform:translateX(-100%);} 100%{transform:translateX(300%);} }

/* ---------- section heads ---------- */
.sec-head { margin-bottom: 3rem; }
.sec-kicker {
  font-family: var(--mono); font-size: .8rem; color: var(--accent);
  display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem;
}
.sec-kicker::before { content:""; width: 22px; height:1px; background: var(--accent); display:inline-block; }
.sec-head h2 { font-size: clamp(1.8rem, 4vw, 2.7rem); font-weight: 700; letter-spacing: -0.02em; }
.sec-head p { color: var(--ink-dim); max-width: 54ch; margin-top: .9rem; }

/* ---------- featured project ---------- */
.feature {
  background: var(--panel); border: 1px solid var(--panel-brd);
  border-radius: 18px; overflow: hidden; backdrop-filter: blur(14px);
  box-shadow: 0 30px 80px -40px rgba(0,0,0,.8);
}
.feature-top { display: grid; grid-template-columns: 1.1fr 1fr; gap: 0; }
@media (max-width: 820px){ .feature-top { grid-template-columns: 1fr; } }
.feature-copy { padding: 2.6rem; }
.feature-copy .tags { display:flex; flex-wrap: wrap; gap:.5rem; margin-bottom: 1.4rem; }
.tag {
  font-family: var(--mono); font-size: .72rem; color: var(--ink-dim);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 6px; padding: .28rem .55rem;
}
.feature-copy h3 { font-size: 1.9rem; font-weight: 700; letter-spacing:-.02em; margin-bottom: .5rem; }
.feature-copy .sub { font-family: var(--mono); font-size:.85rem; color: var(--accent); margin-bottom: 1.2rem; }
.feature-copy p { color: var(--ink-dim); margin-bottom: 1rem; }
.feature-copy .links { display:flex; gap:1.3rem; margin-top: 1.6rem; font-family: var(--mono); font-size:.85rem; }
.feature-copy .links a { color: var(--accent); display:inline-flex; align-items:center; gap:.4rem; }
.feature-copy .links a:hover { text-decoration: underline; }

/* terminal window inside feature */
.term {
  background: #05070a; border-left: 1px solid rgba(255,255,255,0.06);
  font-family: var(--mono); font-size: 12.5px; line-height: 1.75; display:flex; flex-direction:column;
}
.term-bar { display:flex; align-items:center; gap:.5rem; padding:.75rem 1rem; border-bottom:1px solid rgba(255,255,255,0.06); color: var(--ink-faint); }
.term-bar .dots { display:flex; gap:.4rem; }
.term-bar .dots i { width:11px; height:11px; border-radius:50%; display:block; }
.term-bar .dots i:nth-child(1){ background:#ff5f57;} .term-bar .dots i:nth-child(2){ background:#febc2e;} .term-bar .dots i:nth-child(3){ background:#28c840;}
.term-bar span { font-size:.75rem; }
.term-body { padding: 1rem 1.1rem; overflow: hidden; flex:1; }
.term-body .l { white-space: pre-wrap; word-break: break-word; }

.metrics { display:grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid rgba(255,255,255,0.06); }
@media (max-width: 620px){ .metrics { grid-template-columns: repeat(2,1fr);} }
.metric { padding: 1.6rem; border-right: 1px solid rgba(255,255,255,0.06); }
.metric:last-child { border-right: none; }
.metric .n { font-family: var(--mono); font-size: 1.6rem; font-weight: 600; color: var(--accent); }
.metric .k { font-size: .82rem; color: var(--ink-dim); margin-top:.25rem; }

/* ---------- project grid ---------- */
.grid { display:grid; grid-template-columns: repeat(2, 1fr); gap: 1.3rem; }
@media (max-width: 720px){ .grid { grid-template-columns: 1fr; } }
.card {
  background: var(--panel); border: 1px solid rgba(255,255,255,0.07);
  border-radius: 14px; padding: 1.8rem; backdrop-filter: blur(12px);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--panel-brd); box-shadow: 0 24px 60px -30px rgba(0,0,0,.9); }
.card .ic { font-family: var(--mono); color: var(--accent); font-size: .9rem; margin-bottom: 1rem; }
.card h4 { font-size: 1.2rem; font-weight: 650; margin-bottom: .5rem; }
.card p { color: var(--ink-dim); font-size: .95rem; }
.card .stack { display:flex; flex-wrap:wrap; gap:.4rem; margin-top:1.2rem; }
.card .stack span { font-family:var(--mono); font-size:.7rem; color:var(--ink-faint); border:1px solid rgba(255,255,255,.08); border-radius:5px; padding:.2rem .45rem;}

/* ---------- skills ---------- */
.skills { display:grid; grid-template-columns: repeat(4,1fr); gap: 1.4rem; }
@media (max-width: 940px){ .skills { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 520px){ .skills { grid-template-columns: 1fr; } }
.skillcol h5 { font-family: var(--mono); font-size: .8rem; color: var(--accent); margin-bottom: 1rem; text-transform: uppercase; letter-spacing: .08em; }
.skillcol ul { list-style: none; }
.skillcol li { display:flex; align-items:center; justify-content:space-between; gap:.6rem; padding:.5rem 0; border-bottom:1px solid rgba(255,255,255,0.06); color:var(--ink-dim); font-size:.9rem; }
.skillcol li .sk { min-width:0; }
.pips { display:inline-flex; gap:3.5px; flex-shrink:0; }
.pips i { width:5px; height:5px; border-radius:50%; background:rgba(255,255,255,0.15); display:block; }
.pips i.on { background:var(--accent); box-shadow:0 0 5px rgba(126,231,199,0.45); }
.skills-legend { display:flex; flex-wrap:wrap; gap:1.5rem; margin-top:1.8rem; font-family:var(--mono); font-size:.72rem; color:var(--ink-faint); }
.skills-legend > span { display:inline-flex; align-items:center; gap:.5rem; }

/* ---------- about ---------- */
.about-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items:center; }
@media (max-width: 720px){ .about-grid { grid-template-columns: 1fr; } }
.about p { color: var(--ink-dim); margin-bottom: 1.1rem; }
.about p strong { color: var(--ink); }

/* ---------- contact ---------- */
.contact { text-align:center; }
.contact h2 { font-size: clamp(2rem,5vw,3.4rem); font-weight: 800; letter-spacing:-.03em; margin-bottom:1.2rem; }
.contact h2 .grad { background: linear-gradient(100deg,var(--accent),var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.contact p { color: var(--ink-dim); max-width: 44ch; margin: 0 auto 2.2rem; }

footer {
  border-top: 1px solid rgba(255,255,255,0.06); padding: 2.5rem 0;
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:1rem;
  font-family: var(--mono); font-size:.8rem; color: var(--ink-faint);
}
footer a:hover { color: var(--accent); }

/* reveal on scroll */
.reveal { opacity:0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity:1; transform:none; }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity:1 !important; transform:none !important; }
  .led, .scroll-hint .bar::after { animation: none !important; }
}

/* experience timeline */
.exp { display:flex; flex-direction:column; gap:1.1rem; }
.exp-item { display:grid; grid-template-columns:168px 1fr; gap:1.6rem; background:var(--panel); border:1px solid rgba(255,255,255,0.07); border-radius:14px; padding:1.6rem 1.8rem; backdrop-filter:blur(12px); transition:border-color .2s ease; }
.exp-item:hover { border-color:var(--panel-brd); }
.exp-when { font-family:var(--mono); font-size:.82rem; color:var(--accent); padding-top:.25rem; white-space:nowrap; }
.exp-role { font-size:1.15rem; font-weight:650; margin-bottom:.15rem; }
.exp-role .exp-co { color:var(--ink-dim); font-weight:500; }
.exp-body { list-style:none; margin:.7rem 0 0; padding:0; }
.exp-body li { color:var(--ink-dim); font-size:.94rem; margin:.4rem 0; padding-left:1.1rem; position:relative; }
.exp-body li::before { content:"▸"; position:absolute; left:0; top:.15rem; color:var(--accent); font-size:.72rem; }
@media (max-width:640px){ .exp-item { grid-template-columns:1fr; gap:.5rem; } }

/* hardware rig diagram (replaces the featured terminal) */
.rig { background:#05070a; border-left:1px solid rgba(255,255,255,0.06); display:flex; flex-direction:column; }
@media (max-width:820px){ .rig { border-left:none; border-top:1px solid rgba(255,255,255,0.06); } }
.rig-bar { display:flex; align-items:center; gap:.5rem; padding:.75rem 1rem; border-bottom:1px solid rgba(255,255,255,0.06); color:var(--ink-faint); font-family:var(--mono); }
.rig-bar .dots { display:flex; gap:.4rem; }
.rig-bar .dots i { width:11px; height:11px; border-radius:50%; display:block; }
.rig-bar .dots i:nth-child(1){ background:#ff5f57;} .rig-bar .dots i:nth-child(2){ background:#febc2e;} .rig-bar .dots i:nth-child(3){ background:#28c840;}
.rig-bar span { font-size:.75rem; }
.rig-svg { flex:1; display:flex; align-items:center; padding:1.2rem 1.2rem .6rem; }
.rig-svg svg { width:100%; height:auto; display:block; }
.rig-svg text { font-family:var(--mono); }
.dia-node { fill:rgba(126,231,199,0.04); stroke:rgba(255,255,255,0.13); stroke-width:1.2; }
.dia-node.pi { fill:rgba(126,231,199,0.10); stroke:var(--accent); stroke-width:1.7; }
.dia-title { fill:var(--ink); font-weight:600; }
.dia-sub { fill:var(--ink-faint); }
.dia-link { stroke:rgba(126,231,199,0.45); stroke-width:1.4; }
.dia-chip { fill:#0b0f15; stroke:rgba(126,231,199,0.32); stroke-width:1; }
.dia-chip-t { fill:var(--accent); font-weight:500; }
.dia-hdr { fill:#28323d; }
.dia-pin { fill:var(--accent); }
.dia-icon { fill:none; stroke:var(--ink-faint); stroke-width:1.3; }
.dia-icon-a { fill:none; stroke:var(--accent); stroke-width:1.3; }
.dia-pintag { fill:rgba(126,231,199,0.7); }
.pin-i2c { fill:#7ee7c7; } .pin-jtag { fill:#f5c451; } .pin-uart { fill:#5eb3f5; }
.wire-i2c { stroke:#7ee7c7; stroke-width:1.7; fill:none; } .wire-jtag { stroke:#f5c451; stroke-width:1.7; fill:none; } .wire-uart { stroke:#5eb3f5; stroke-width:1.7; fill:none; }
.chip-i2c { fill:#0b0f15; stroke:#7ee7c7; } .chip-jtag { fill:#0b0f15; stroke:#f5c451; } .chip-uart { fill:#0b0f15; stroke:#5eb3f5; }
.ct-i2c { fill:#7ee7c7; font-weight:500; } .ct-jtag { fill:#f5c451; font-weight:500; } .ct-uart { fill:#5eb3f5; font-weight:500; }
.dia-hdr-frame { fill:none; stroke:rgba(255,255,255,0.09); }
.node-i2c { stroke:rgba(126,231,199,0.55); } .node-jtag { stroke:rgba(245,196,81,0.55); } .node-uart { stroke:rgba(94,179,245,0.55); } .node-pwm { stroke:rgba(126,231,199,0.4); }
.rig-cap { padding:.2rem 1.2rem 1.1rem; font-family:var(--mono); font-size:.72rem; line-height:1.6; color:var(--ink-faint); }
.rig-cap code { color:var(--ink-dim); }