/* ==========================================================================
   ramachokkalingam.github.io — terminal / agentic design system
   ========================================================================== */

/* ---- 1. Tokens ---------------------------------------------------------- */
:root {
  --bg:        #07080a;
  --bg-2:      #0a0c0f;
  --surface:   #0e1116;
  --surface-2: #141922;
  --line:      #1d232c;
  --line-2:    #2b3542;
  --text:      #e9edf2;
  --dim:       #8d97a5;
  --faint:     #5c6673;
  --acc:       #b8ff2e;
  --acc-ink:   #07080a;
  --acc-soft:  rgba(184, 255, 46, 0.10);
  --acc-line:  rgba(184, 255, 46, 0.32);
  --acc-2:     #4dd8ff;
  --acc-2-soft:rgba(77, 216, 255, 0.10);
  --warn:      #ffb454;

  --grid:      rgba(255, 255, 255, 0.035);
  --glow:      rgba(184, 255, 46, 0.13);
  --shadow:    0 24px 60px -28px rgba(0, 0, 0, 0.9);

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --r:    10px;
  --r-lg: 16px;
  --maxw: 1160px;
  --pad:  clamp(1.15rem, 4vw, 2.5rem);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

html[data-theme="light"] {
  --bg:        #f5f6f2;
  --bg-2:      #ffffff;
  --surface:   #ffffff;
  --surface-2: #f0f2ec;
  --line:      #e0e3da;
  --line-2:    #c9cec1;
  --text:      #12151a;
  --dim:       #5a6472;
  --faint:     #838d9b;
  --acc:       #3f7d00;
  --acc-ink:   #ffffff;
  --acc-soft:  rgba(63, 125, 0, 0.09);
  --acc-line:  rgba(63, 125, 0, 0.30);
  --acc-2:     #0369a1;
  --acc-2-soft:rgba(3, 105, 161, 0.09);
  --warn:      #b45309;
  --grid:      rgba(0, 0, 0, 0.045);
  --glow:      rgba(63, 125, 0, 0.10);
  --shadow:    0 22px 50px -30px rgba(20, 30, 10, 0.45);
}

/* ---- 2. Reset ----------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { list-style: none; padding: 0; }

::selection { background: var(--acc); color: var(--acc-ink); }

:focus-visible {
  outline: 2px solid var(--acc);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---- 3. Ambient background --------------------------------------------- */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.bg-grid {
  position: absolute;
  inset: -2px;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 20%, transparent 78%);
}
.bg-spot {
  position: absolute;
  width: 900px; height: 900px;
  left: var(--mx, 50%); top: var(--my, 0%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--glow) 0%, transparent 62%);
  transition: opacity .6s var(--ease);
  will-change: transform;
}
.bg-noise {
  position: absolute; inset: 0; opacity: .028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- 4. Layout ---------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}
section { position: relative; }
.band { padding-block: clamp(4.5rem, 11vw, 8rem); }
.band + .band { padding-top: 0; }
.rule { height: 1px; background: var(--line); border: 0; }

/* ---- 5. Type ------------------------------------------------------------ */
.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--acc);
  display: flex;
  align-items: center;
  gap: .6rem;
}
.eyebrow::before { content: "//"; color: var(--faint); }

.sec-head { margin-bottom: clamp(2rem, 4vw, 3.25rem); }
.sec-title {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4.2vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.12;
  margin-top: .85rem;
  text-wrap: balance;
}
.sec-sub {
  color: var(--dim);
  max-width: 62ch;
  margin-top: .85rem;
  font-size: 1rem;
}
.prose p { color: var(--dim); max-width: 68ch; }
.prose p + p { margin-top: 1.1rem; }
.prose strong { color: var(--text); font-weight: 600; }
.mono { font-family: var(--mono); }
.acc { color: var(--acc); }

/* ---- 6. Nav ------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav.is-stuck { border-bottom-color: var(--line); }
.nav-in {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 62px;
}
.brand {
  font-family: var(--mono);
  font-size: .88rem;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.brand .sig { color: var(--acc); }
.brand .caret {
  width: 8px; height: 15px;
  background: var(--acc);
  animation: blink 1.15s steps(1) infinite;
}
@keyframes blink { 0%, 49% { opacity: 1 } 50%, 100% { opacity: 0 } }

.nav-links {
  display: flex;
  align-items: center;
  gap: .25rem;
  margin-left: auto;
  font-family: var(--mono);
  font-size: .8rem;
}
.nav-links a {
  padding: .42rem .7rem;
  border-radius: 6px;
  color: var(--dim);
  transition: color .18s, background .18s;
  position: relative;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.is-active { color: var(--acc); }
.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: .7rem; right: .7rem; bottom: .15rem;
  height: 1px; background: var(--acc);
}

.nav-tools { display: flex; align-items: center; gap: .4rem; margin-left: .6rem; }
.icon-btn {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--dim);
  background: var(--surface);
  transition: all .18s var(--ease);
}
.icon-btn:hover { color: var(--acc); border-color: var(--acc-line); }
.icon-btn svg { width: 16px; height: 16px; }
.kbd-btn {
  display: flex; align-items: center; gap: .5rem;
  height: 34px; padding: 0 .6rem 0 .7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--faint);
  transition: all .18s var(--ease);
}
.kbd-btn:hover { color: var(--text); border-color: var(--line-2); }
.kbd-btn kbd {
  font-family: var(--mono);
  font-size: .68rem;
  padding: .1rem .32rem;
  border: 1px solid var(--line-2);
  border-radius: 4px;
  color: var(--dim);
}
.burger { display: none; }

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    inset: 62px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    padding: .5rem var(--pad) 1.25rem;
    font-size: 1rem;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .22s var(--ease), transform .22s var(--ease);
  }
  .nav-links.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { padding: .8rem .2rem; border-bottom: 1px solid var(--line); }
  .nav-links a.is-active::after { display: none; }
  .burger { display: grid; margin-left: auto; }
  .nav-tools { margin-left: .2rem; }
  .kbd-btn { display: none; }
}

/* ---- 7. Command palette ------------------------------------------------- */
.cmdk {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: start center;
  padding: clamp(1rem, 10vh, 7rem) 1rem 1rem;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .16s var(--ease);
}
.cmdk.is-open { opacity: 1; pointer-events: auto; }
.cmdk-box {
  width: min(640px, 100%);
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: translateY(-8px) scale(.99);
  transition: transform .18s var(--ease);
}
.cmdk.is-open .cmdk-box { transform: none; }
.cmdk-top {
  display: flex; align-items: center; gap: .7rem;
  padding: .95rem 1.1rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
}
.cmdk-top .p { color: var(--acc); font-size: .9rem; }
.cmdk-top input {
  flex: 1; background: none; border: 0; outline: none;
  color: var(--text); font-family: var(--mono); font-size: .92rem;
}
.cmdk-top input::placeholder { color: var(--faint); }
.cmdk-list { max-height: min(52vh, 420px); overflow-y: auto; padding: .4rem; }
.cmdk-group {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--faint);
  padding: .7rem .75rem .35rem;
}
.cmdk-item {
  display: flex; align-items: center; gap: .8rem;
  width: 100%; text-align: left;
  padding: .6rem .75rem;
  border-radius: 8px;
  font-family: var(--mono); font-size: .85rem;
  color: var(--dim);
  transition: background .12s, color .12s;
}
.cmdk-item .ic { color: var(--faint); width: 14px; text-align: center; flex: none; }
.cmdk-item .meta { margin-left: auto; font-size: .7rem; color: var(--faint); }
.cmdk-item[aria-selected="true"] { background: var(--acc-soft); color: var(--text); }
.cmdk-item[aria-selected="true"] .ic { color: var(--acc); }
.cmdk-empty { padding: 1.6rem .75rem; text-align: center; color: var(--faint); font-family: var(--mono); font-size: .82rem; }
.cmdk-foot {
  display: flex; gap: 1.1rem; flex-wrap: wrap;
  padding: .6rem 1.1rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: .68rem; color: var(--faint);
}
.cmdk-foot kbd {
  font-family: var(--mono);
  border: 1px solid var(--line-2); border-radius: 4px;
  padding: 0 .3rem; margin-right: .3rem;
}

/* ---- 8. Hero ------------------------------------------------------------ */
.hero { padding-block: clamp(3rem, 8vw, 6rem) clamp(3.5rem, 8vw, 6rem); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.hero-status {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--dim);
  border: 1px solid var(--line); border-radius: 100px;
  padding: .35rem .8rem .35rem .6rem;
  background: var(--surface);
}
.pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--acc);
  box-shadow: 0 0 0 0 var(--acc-line);
  animation: pulse 2.2s var(--ease) infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 var(--acc-line); }
  70%  { box-shadow: 0 0 0 9px rgba(0,0,0,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,0,0,0); }
}
.hero h1 {
  font-family: var(--mono);
  font-size: clamp(2.05rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -.045em;
  margin: 1.4rem 0 0;
}
.hero h1 .l2 { display: block; color: var(--acc); }
.hero-lede {
  color: var(--dim);
  font-size: clamp(1rem, 1.9vw, 1.12rem);
  max-width: 46ch;
  margin-top: 1.5rem;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 2.1rem; }

.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--mono); font-size: .82rem; font-weight: 500;
  padding: .72rem 1.15rem;
  border-radius: 8px;
  border: 1px solid var(--line-2);
  color: var(--text);
  background: var(--surface);
  transition: all .2s var(--ease);
}
.btn:hover { border-color: var(--acc-line); color: var(--acc); transform: translateY(-2px); }
.btn-primary {
  background: var(--acc); color: var(--acc-ink); border-color: var(--acc);
  font-weight: 600;
}
.btn-primary:hover {
  color: var(--acc-ink);
  box-shadow: 0 10px 30px -12px var(--acc);
  filter: brightness(1.06);
}
.btn svg { width: 15px; height: 15px; }

/* terminal card */
.term {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.term::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 0%, var(--acc-soft) 140%);
  pointer-events: none;
}
.term-bar {
  display: flex; align-items: center; gap: .5rem;
  padding: .62rem .9rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.dot:nth-child(1) { background: #ff5f57; }
.dot:nth-child(2) { background: #febc2e; }
.dot:nth-child(3) { background: #28c840; }
.term-path {
  margin-left: .6rem;
  font-family: var(--mono); font-size: .72rem; color: var(--faint);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.term-body {
  padding: 1.15rem 1.2rem 1.35rem;
  font-family: var(--mono);
  font-size: clamp(.76rem, 1.5vw, .85rem);
  line-height: 1.85;
}
.term-line { display: flex; gap: .55rem; }
.term-line .ps1 { color: var(--acc); flex: none; }
.term-line .cmd { color: var(--text); }
.term-out { margin: .5rem 0 1rem; }
.kv { display: grid; grid-template-columns: 92px 1fr; gap: .3rem .8rem; }
.kv dt { color: var(--faint); }
.kv dd { color: var(--dim); margin: 0; }
.kv dd b { color: var(--text); font-weight: 500; }
.cursor-blk {
  display: inline-block; width: 8px; height: 1.05em;
  background: var(--acc); vertical-align: text-bottom;
  animation: blink 1.15s steps(1) infinite;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

/* ---- 9. Marquee --------------------------------------------------------- */
.marquee {
  border-block: 1px solid var(--line);
  overflow: hidden;
  padding-block: .8rem;
  background: var(--bg-2);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex; gap: 2.4rem; width: max-content;
  animation: slide 42s linear infinite;
  font-family: var(--mono); font-size: .78rem; letter-spacing: .06em;
  color: var(--faint);
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { display: flex; align-items: center; gap: 2.4rem; white-space: nowrap; }
.marquee-track span::after { content: "◆"; color: var(--acc); font-size: .6rem; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---- 10. Stats ---------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--surface);
}
.stat { padding: 1.5rem 1.35rem; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat b {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 700; letter-spacing: -.03em;
  color: var(--acc);
  line-height: 1;
}
.stat span {
  display: block; margin-top: .55rem;
  font-size: .8rem; color: var(--dim); line-height: 1.45;
}
@media (max-width: 760px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

/* ---- 11. Timeline ------------------------------------------------------- */
.tl { position: relative; padding-left: 1.6rem; }
.tl::before {
  content: ""; position: absolute; left: 4px; top: .5rem; bottom: .5rem;
  width: 1px; background: linear-gradient(180deg, var(--acc-line), var(--line) 45%, transparent);
}
.tl-item { position: relative; padding-bottom: 2.4rem; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -1.6rem; top: .55rem;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--bg); border: 1px solid var(--acc-line);
  box-shadow: 0 0 0 3px var(--bg);
}
.tl-item.is-now::before { background: var(--acc); border-color: var(--acc); }
.tl-meta {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--faint);
  display: flex; flex-wrap: wrap; gap: .5rem .9rem;
}
.tl-role {
  font-family: var(--mono); font-size: 1.05rem; font-weight: 600;
  margin: .45rem 0 .1rem; letter-spacing: -.02em;
}
.tl-org { color: var(--acc); font-size: .88rem; font-family: var(--mono); }
.tl-item ul { margin-top: .85rem; display: grid; gap: .5rem; }
.tl-item li {
  color: var(--dim); font-size: .93rem;
  padding-left: 1.15rem; position: relative;
}
.tl-item li::before {
  content: "›"; position: absolute; left: 0; top: -.05rem;
  color: var(--acc); font-family: var(--mono);
}

/* ---- 12. Project cards -------------------------------------------------- */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 2rem; }
.chip {
  font-family: var(--mono); font-size: .76rem;
  padding: .45rem .85rem;
  border: 1px solid var(--line); border-radius: 100px;
  color: var(--dim); background: var(--surface);
  transition: all .18s var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--line-2); }
.chip[aria-pressed="true"] {
  background: var(--acc); color: var(--acc-ink);
  border-color: var(--acc); font-weight: 600;
}
.chip .n { opacity: .55; margin-left: .35rem; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.15rem;
}
.card {
  position: relative;
  display: flex; flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  overflow: hidden;
  transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}
.card:hover {
  border-color: var(--acc-line);
  transform: translateY(-4px);
  box-shadow: 0 22px 44px -30px rgba(0,0,0,.85), 0 0 0 1px var(--acc-soft);
}
.card.is-hidden { display: none; }
.card-art {
  height: 132px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 120% at 80% 0%, var(--acc-soft), transparent 60%),
    var(--surface-2);
  position: relative; overflow: hidden;
}
.card-art svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.card-tag {
  position: absolute; top: .7rem; left: .8rem; z-index: 2;
  font-family: var(--mono); font-size: .64rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--acc);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border: 1px solid var(--acc-line); border-radius: 100px;
  padding: .18rem .6rem;
}
.card-body { padding: 1.15rem 1.2rem 1.3rem; display: flex; flex-direction: column; flex: 1; }
.card-title {
  font-family: var(--mono); font-size: 1.02rem; font-weight: 600;
  letter-spacing: -.02em; line-height: 1.3;
  display: flex; align-items: baseline; gap: .5rem;
}
.card-title .arw { color: var(--faint); transition: transform .2s var(--ease), color .2s; }
.card:hover .card-title .arw { color: var(--acc); transform: translate(3px, -3px); }
.card-sub {
  font-family: var(--mono); font-size: .72rem; color: var(--acc-2);
  margin-top: .3rem;
}
.card p { color: var(--dim); font-size: .9rem; margin-top: .75rem; }
.tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 1.1rem; padding-top: 1rem; border-top: 1px dashed var(--line); }
.tag {
  font-family: var(--mono); font-size: .68rem;
  color: var(--faint);
  border: 1px solid var(--line); border-radius: 5px;
  padding: .14rem .42rem;
}
.card:hover .tag { border-color: var(--line-2); color: var(--dim); }
.card-link { margin-top: auto; }

/* ---- 13. Stack matrix --------------------------------------------------- */
.stack { display: grid; grid-template-columns: repeat(auto-fit, minmax(268px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.stack-cell { background: var(--surface); padding: 1.4rem 1.35rem; transition: background .25s var(--ease); }
.stack-cell:hover { background: var(--surface-2); }
.stack-cell h3 {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--acc); font-weight: 600;
  display: flex; align-items: center; gap: .5rem;
}
.stack-cell h3 .idx { color: var(--faint); font-weight: 400; }
.stack-cell ul { margin-top: .95rem; display: flex; flex-wrap: wrap; gap: .35rem; }
.stack-cell li {
  font-family: var(--mono); font-size: .74rem; color: var(--dim);
  border: 1px solid var(--line); border-radius: 5px; padding: .2rem .5rem;
  transition: all .18s var(--ease);
}
.stack-cell li:hover { color: var(--text); border-color: var(--acc-line); background: var(--acc-soft); }

/* ---- 14. Panels / lists ------------------------------------------------- */
.two-col { display: grid; grid-template-columns: 1.25fr 1fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

.panel {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface); padding: 1.4rem 1.4rem 1.5rem;
}
.panel h3 {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--faint); font-weight: 500;
}
.tick { margin-top: 1rem; display: grid; gap: .7rem; }
.tick li { position: relative; padding-left: 1.5rem; color: var(--dim); font-size: .92rem; }
.tick li::before {
  content: "▸"; position: absolute; left: 0; top: 0;
  color: var(--acc); font-family: var(--mono);
}
.certs { display: grid; gap: .6rem; margin-top: 1rem; }
.certs li {
  display: flex; align-items: center; gap: .7rem;
  font-family: var(--mono); font-size: .82rem; color: var(--dim);
  border: 1px solid var(--line); border-radius: 8px; padding: .7rem .85rem;
  transition: border-color .2s;
}
.certs li:hover { border-color: var(--acc-line); }
.certs .badge {
  width: 26px; height: 26px; flex: none;
  display: grid; place-items: center;
  border-radius: 6px; background: var(--acc-soft); color: var(--acc);
  font-size: .7rem;
}

/* ---- 15. Contact / footer ----------------------------------------------- */
.contact-term { max-width: 820px; margin-inline: auto; }
.contact-term .term-body { padding-block: 1.6rem 1.8rem; }
.contact-h {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  font-weight: 700; letter-spacing: -.035em; line-height: 1.1;
  margin: .9rem 0 .8rem; color: var(--text);
}
.socials { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.6rem; }
.social {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .78rem;
  border: 1px solid var(--line); border-radius: 8px;
  padding: .5rem .8rem; color: var(--dim);
  background: var(--bg-2);
  transition: all .2s var(--ease);
}
.social:hover { color: var(--acc); border-color: var(--acc-line); transform: translateY(-2px); }
.social svg { width: 15px; height: 15px; }

.foot {
  border-top: 1px solid var(--line);
  padding-block: 1.6rem;
  margin-top: clamp(3rem, 8vw, 5rem);
}
.foot-in {
  display: flex; flex-wrap: wrap; gap: .6rem 1.5rem;
  align-items: center; justify-content: space-between;
  font-family: var(--mono); font-size: .74rem; color: var(--faint);
}
.foot-in a:hover { color: var(--acc); }

/* ---- 16. Reveal + motion ------------------------------------------------ */
/* Content is visible by default; only a JS-enabled page hides it to animate in,
   so the page reads fully at rest (no-JS, print, thumbnail capture). */
.rise { opacity: 1; transform: none; }
html.js .rise:not(.in) { opacity: 0; transform: translateY(18px); }
html.js .rise.in { opacity: 1; transform: none; transition: opacity .7s var(--ease), transform .7s var(--ease); }
html.js .rise.d1.in { transition-delay: .07s } html.js .rise.d2.in { transition-delay: .14s }
html.js .rise.d3.in { transition-delay: .21s } html.js .rise.d4.in { transition-delay: .28s }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.js .rise:not(.in) { opacity: 1; transform: none; }
}

/* ==========================================================================
   Upgrades — interactive terminal, robot bench, case studies, repo table
   ========================================================================== */

/* ---- Skip link ---------------------------------------------------------- */
.skip {
  position: absolute; left: .5rem; top: -3rem; z-index: 300;
  background: var(--acc); color: var(--acc-ink);
  font-family: var(--mono); font-size: .8rem; font-weight: 600;
  padding: .55rem .9rem; border-radius: 6px;
  transition: top .18s var(--ease);
}
.skip:focus { top: .5rem; }

/* ---- Interactive terminal ----------------------------------------------- */
.term.is-live { cursor: text; }
.term-scroll {
  max-height: 330px; overflow-y: auto; overscroll-behavior: contain;
  scrollbar-width: thin; scrollbar-color: var(--line-2) transparent;
}
.term-scroll::-webkit-scrollbar { width: 6px; }
.term-scroll::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 3px; }

.term-echo { display: flex; gap: .55rem; margin-top: .9rem; }
.term-echo .ps1 { color: var(--acc); flex: none; }
.term-echo .cmd { color: var(--text); word-break: break-word; }

.t-out { margin: .35rem 0 0; color: var(--dim); }
.t-out .k { color: var(--text); }
.t-err { color: var(--warn); }
.t-hint { color: var(--faint); }
.t-list { display: grid; gap: .28rem; margin-top: .3rem; }
.t-list > div { display: grid; grid-template-columns: minmax(96px, 8.5rem) 1fr; gap: .8rem; }
.t-list b { color: var(--acc); font-weight: 500; }
.t-list a { color: var(--text); border-bottom: 1px solid var(--acc-line); }
.t-list a:hover { color: var(--acc); }
.t-tags { display: flex; flex-wrap: wrap; gap: .3rem .55rem; margin-top: .35rem; color: var(--faint); }

.term-prompt { display: flex; align-items: baseline; gap: .55rem; margin-top: .9rem; }
.term-prompt .ps1 { color: var(--acc); flex: none; }
.term-field { position: relative; flex: 1; min-width: 0; }
.term-field input {
  width: 100%; background: none; border: 0; outline: none; padding: 0;
  color: var(--text); font: inherit; caret-color: transparent;
}
.term-field .ghost {
  position: absolute; left: 0; top: 0; white-space: pre; pointer-events: none;
  color: transparent;
}
.term-field .ghost .rest { color: var(--faint); }
.term-field .fake-caret {
  position: absolute; top: .08em; width: 8px; height: 1.05em;
  background: var(--acc); animation: blink 1.15s steps(1) infinite;
}
.term.is-blur .fake-caret { animation: none; opacity: .35; }
.term-help {
  display: flex; flex-wrap: wrap; gap: .35rem;
  padding: .7rem .9rem; border-top: 1px solid var(--line);
  background: var(--bg-2);
}
.term-help button {
  font-family: var(--mono); font-size: .68rem; color: var(--faint);
  border: 1px solid var(--line); border-radius: 5px; padding: .2rem .5rem;
  transition: all .15s var(--ease);
}
.term-help button:hover { color: var(--acc); border-color: var(--acc-line); }
.term-help .lbl { color: var(--faint); font-family: var(--mono); font-size: .68rem; align-self: center; margin-right: .2rem; }

/* ---- Robot bench -------------------------------------------------------- */
.rbt { display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: center; }
/* On one column the arm must come before the controls that drive it,
   otherwise it lands below a screen and a half of text and reads as broken. */
@media (max-width: 900px) {
  .rbt { grid-template-columns: 1fr; gap: 1.5rem; }
  .rbt-left { display: contents; }
  .rbt-intro { order: 1; margin-bottom: 0; }
  .rbt-stage { order: 2; aspect-ratio: 1 / 1; max-height: 400px; }
  .rbt-panel { order: 3; }
  .rbt-cmds { margin-top: 0; }
}
/* five labels collide on a small stage — keep the three that carry the idea */
@media (max-width: 620px) {
  .jlabel[data-jl="shoulder"], .jlabel[data-jl="wrist"] { display: none; }
  .jlabel { font-size: .58rem; }
}

.rbt-stage {
  position: relative; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: radial-gradient(90% 70% at 50% 8%, var(--acc-soft), transparent 62%), var(--surface);
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 3.4; max-height: 470px;
}
.rbt-stage canvas { width: 100%; height: 100%; touch-action: pan-y; }
.rbt-fallback { position: absolute; inset: 0; display: grid; place-items: center; padding: 2rem; }

.jlabel {
  position: absolute; left: 0; top: 0; z-index: 3; pointer-events: none;
  font-family: var(--mono); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--acc); background: color-mix(in srgb, var(--bg) 78%, transparent);
  border: 1px solid var(--acc-line); border-radius: 100px; padding: .1rem .45rem;
  transform: translate(-50%, -50%); white-space: nowrap;
  opacity: 0; transition: opacity .3s var(--ease);
}
.rbt-stage.labels-on .jlabel { opacity: 1; }

.rbt-tag {
  position: absolute; top: .8rem; left: .9rem; z-index: 3;
  display: flex; align-items: center; gap: .45rem;
  font-family: var(--mono); font-size: .64rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--faint);
}
.rbt-tag i { width: 5px; height: 5px; border-radius: 50%; background: var(--acc); }

.rbt-readout {
  border: 1px solid var(--line); border-radius: var(--r); background: var(--surface);
  overflow: hidden; margin-top: 1.4rem;
}
.rbt-readout .hd {
  display: flex; align-items: center; justify-content: space-between;
  padding: .5rem .85rem; border-bottom: 1px solid var(--line); background: var(--surface-2);
  font-family: var(--mono); font-size: .64rem; letter-spacing: .13em; text-transform: uppercase; color: var(--faint);
}
.rbt-readout .hd .state { color: var(--acc); }
.jrow {
  display: grid; grid-template-columns: 1fr 78px 1fr; align-items: center; gap: .8rem;
  padding: .42rem .85rem; border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: .74rem;
}
.jrow:last-child { border-bottom: 0; }
.jrow .n { color: var(--faint); letter-spacing: .08em; text-transform: uppercase; }
.jrow .v { color: var(--text); text-align: right; font-variant-numeric: tabular-nums; }
.jrow .bar { position: relative; height: 3px; border-radius: 2px; background: var(--line); }
.jrow .bar i {
  position: absolute; top: -1px; height: 5px; width: 5px; border-radius: 50%;
  background: var(--acc); left: 50%; transform: translateX(-50%);
  transition: left .12s linear;
}
.jrow .bar::before { content: ""; position: absolute; left: 50%; top: -3px; width: 1px; height: 9px; background: var(--line-2); }

.rbt-cmds { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1.2rem; }
.rbt-cmds button {
  font-family: var(--mono); font-size: .74rem; color: var(--dim);
  border: 1px solid var(--line); border-radius: 6px; padding: .42rem .75rem;
  background: var(--surface); transition: all .16s var(--ease);
}
.rbt-cmds button:hover { color: var(--acc); border-color: var(--acc-line); }
.rbt-cmds button[aria-pressed="true"] { background: var(--acc); color: var(--acc-ink); border-color: var(--acc); font-weight: 600; }

/* ---- Case studies on cards ---------------------------------------------- */
.card-meta { display: flex; align-items: center; gap: .55rem; margin-top: .3rem; }
.card-meta .card-sub { margin-top: 0; }
.card-sub .note { color: var(--faint); }
.term-scroll > .term-echo:first-child { margin-top: 0; }
.repos-foot .num { color: var(--text); }
.card-stars {
  display: inline-flex; align-items: center; gap: .25rem;
  font-family: var(--mono); font-size: .68rem; color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.card-stars svg { width: 11px; height: 11px; }
.card-open {
  align-self: flex-start;
  display: inline-flex; align-items: center; gap: .4rem; margin-top: 1rem;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .06em;
  color: var(--faint); border: 1px solid var(--line); border-radius: 6px;
  padding: .3rem .6rem; transition: all .16s var(--ease);
}
.card-open:hover { color: var(--acc); border-color: var(--acc-line); }
.card-open .chev { transition: transform .22s var(--ease); }
.card[data-open="1"] .card-open .chev { transform: rotate(180deg); }
.case { display: none; margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--line); }
.card[data-open="1"] .case { display: block; }
.case dl { display: grid; gap: .75rem; }
.case dt {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--acc);
}
.case dd { margin: .25rem 0 0; color: var(--dim); font-size: .88rem; line-height: 1.6; }

/* ---- Repo table --------------------------------------------------------- */
.repos { border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--surface); overflow: hidden; }
.repos-head, .repo-row { display: grid; grid-template-columns: 1fr 128px 72px 96px; gap: 1rem; align-items: center; padding: .6rem 1.1rem; }
.repos-head {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--faint); background: var(--surface-2); border-bottom: 1px solid var(--line);
}
.repo-row { border-bottom: 1px solid var(--line); transition: background .14s; }
.repo-row:last-child { border-bottom: 0; }
.repo-row:hover { background: var(--surface-2); }
.repo-row .nm { display: flex; align-items: center; gap: .55rem; min-width: 0; font-family: var(--mono); font-size: .8rem; color: var(--text); }
.repo-row .nm span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.repo-row:hover .nm { color: var(--acc); }
.repo-row .lg, .repo-row .st, .repo-row .up { font-family: var(--mono); font-size: .72rem; color: var(--faint); font-variant-numeric: tabular-nums; }
.repo-row .st, .repo-row .up { text-align: right; }
.lang-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line-2); flex: none; }
.repos-foot {
  display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center;
  padding: .65rem 1.1rem; background: var(--surface-2); border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: .68rem; color: var(--faint);
}
.repos-foot a:hover { color: var(--acc); }
.repos-scroll { max-height: 440px; overflow-y: auto; }
@media (max-width: 640px) {
  .repos-head, .repo-row { grid-template-columns: 1fr 60px; }
  .repos-head .lg, .repo-row .lg, .repos-head .up, .repo-row .up { display: none; }
}

/* ---- Off-repo list ------------------------------------------------------ */
.offrepo { display: grid; gap: .55rem; margin-top: 1rem; }
.offrepo li { position: relative; padding-left: 1.4rem; color: var(--dim); font-size: .92rem; }
.offrepo li::before { content: "•"; position: absolute; left: 0; color: var(--acc); font-family: var(--mono); }
.offrepo strong { color: var(--text); font-weight: 600; }

/* expanding one card must not stretch its neighbours */
.cards { align-items: start; }

/* ---- terminal: preformatted output --------------------------------------- */
.t-pre {
  font-family: var(--mono); white-space: pre; line-height: 1.45;
  color: var(--dim); margin-top: .45rem; overflow-x: auto;
  scrollbar-width: none;
}
.t-pre::-webkit-scrollbar { display: none; }
.t-pre .a { color: var(--acc); }
.t-pre .h { color: var(--text); }
.t-neo { display: flex; gap: 1.4rem; align-items: flex-start; margin-top: .45rem; }
.t-neo pre { font-family: var(--mono); white-space: pre; line-height: 1.15; color: var(--acc); margin: 0; flex: none; }
.t-neo .info { min-width: 0; flex: 1 1 0; }
.t-neo .t-list > div { grid-template-columns: 62px 1fr; gap: .6rem; }
@media (max-width: 560px) { .t-neo { flex-direction: column; gap: .7rem; } }
.t-group { margin-top: .8rem; }
.t-group:first-child { margin-top: .3rem; }
.t-group > span { color: var(--faint); font-size: .92em; letter-spacing: .08em; text-transform: uppercase; }

/* long terminal output must scroll inside the panel, not widen the hero column */
.hero-grid > * { min-width: 0; }
.term, .term-body, .term-scroll { min-width: 0; }