/* ==========================================================================
   Vigneshkumar Venugopal — portfolio
   Hand-written CSS. No framework, no build step.
   ========================================================================== */

/* ---------- tokens ---------- */
:root{
  --bg:#0b0a09;
  --bg-alt:#100e0c;
  --surface:#16130f;
  --surface-2:#1c1814;
  --line:#2b2620;
  --line-soft:#211d18;
  --text:#f2ede6;
  --text-2:#b8ada0;
  --text-3:#7d7367;
  --accent:#f5a524;
  --accent-2:#ff6b35;
  --accent-3:#e8c07d;
  --accent-soft:rgba(245,165,36,.13);
  --glow:rgba(245,165,36,.28);
  --canvas-node-rgb:255,190,110;
  --canvas-link-rgb:245,165,36;
  --on-accent:#12100c;
  --dot-4:#7dd3fc;
  --dot-4-glow:rgba(125,211,252,.4);
  --shadow:0 24px 60px -24px rgba(0,0,0,.85);

  --f-display:'Space Grotesk',ui-sans-serif,system-ui,sans-serif;
  --f-body:'Inter',ui-sans-serif,system-ui,-apple-system,sans-serif;
  --f-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;

  --wrap:1220px;
  --r:16px;
  --ease:cubic-bezier(.22,1,.36,1);
}

[data-theme="light"]{
  --bg:#fdfbf7;
  --bg-alt:#f5f1e9;
  --surface:#ffffff;
  --surface-2:#faf7f1;
  --line:#e8e0d3;
  --line-soft:#f0eae0;
  --text:#1a1512;
  --text-2:#5c5348;
  --text-3:#8a8073;
  --accent:#c2700a;
  --accent-2:#e0521f;
  --accent-3:#a67c34;
  --accent-soft:rgba(194,112,10,.09);
  --glow:rgba(194,112,10,.18);
  --canvas-node-rgb:194,112,10;
  --canvas-link-rgb:194,112,10;
  --on-accent:#ffffff;
  --dot-4:#0a7ea4;
  --dot-4-glow:rgba(10,126,164,.35);
  --shadow:0 20px 50px -26px rgba(60,40,15,.28);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--text);
  font-family:var(--f-body);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background .5s var(--ease),color .5s var(--ease);
}
img,svg,canvas{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}
::selection{background:var(--accent);color:var(--on-accent)}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

.skip-link{
  position:fixed;top:-100px;left:16px;z-index:200;padding:12px 18px;
  background:var(--accent);color:#fff;border-radius:10px;font-weight:600;
}
.skip-link:focus{top:16px}

.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}

/* ---------- ambient ---------- */
.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;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");
}
[data-theme="light"] .grain{opacity:.05}

.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:120;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  box-shadow:0 0 12px var(--glow);
  transition:width .1s linear;
}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .35s var(--ease),border-color .35s var(--ease),backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:color-mix(in srgb,var(--bg) 78%,transparent);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border-bottom-color:var(--line-soft);
}
.nav__inner{
  width:min(var(--wrap),calc(100% - 48px));margin-inline:auto;
  height:70px;display:flex;align-items:center;gap:28px;
}
.nav__brand{display:flex;align-items:center;gap:11px;font-family:var(--f-display);font-weight:600;letter-spacing:-.01em}
.nav__mark{
  width:30px;height:30px;display:grid;place-items:center;border-radius:9px;
  background:linear-gradient(135deg,var(--accent),var(--accent-3));
  color:var(--on-accent);font-size:15px;font-weight:700;
  box-shadow:0 4px 14px -4px var(--glow);
}
.nav__name{font-size:15px}
.nav__dim{color:var(--text-3);font-weight:400}
.nav__links{margin-left:auto;display:flex;gap:4px}
.nav__links a{
  padding:8px 14px;border-radius:9px;font-size:14px;color:var(--text-2);
  transition:color .2s,background .2s;position:relative;
}
.nav__links a:hover,.nav__links a.is-active{color:var(--text);background:var(--surface-2)}
.nav__actions{display:flex;align-items:center;gap:8px;margin-left:6px}

.kbd-btn{
  display:flex;align-items:center;gap:6px;padding:7px 10px 7px 13px;
  border:1px solid var(--line);border-radius:10px;background:var(--surface);
  font-size:13px;color:var(--text-3);transition:border-color .2s,color .2s;
}
.kbd-btn:hover{border-color:var(--accent);color:var(--text)}
kbd{
  font-family:var(--f-mono);font-size:11px;padding:2px 5px;border-radius:5px;
  background:var(--surface-2);border:1px solid var(--line);color:var(--text-2);line-height:1.4;
}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);color:var(--text-2);
  transition:border-color .2s,color .2s,transform .2s;
}
.icon-btn:hover{border-color:var(--accent);color:var(--text);transform:translateY(-1px)}
.i-sun{display:none}
[data-theme="light"] .i-sun{display:block}
[data-theme="light"] .i-moon{display:none}

.nav__burger{display:none;flex-direction:column;gap:5px}
.nav__burger span{width:16px;height:1.8px;background:currentColor;border-radius:2px;transition:transform .3s var(--ease),opacity .2s}
.nav__burger[aria-expanded="true"] span:first-child{transform:translateY(3.4px) rotate(45deg)}
.nav__burger[aria-expanded="true"] span:last-child{transform:translateY(-3.4px) rotate(-45deg)}

.mobile-menu{
  position:fixed;top:70px;left:0;right:0;z-index:99;display:none;flex-direction:column;
  background:color-mix(in srgb,var(--bg) 96%,transparent);
  backdrop-filter:blur(20px);border-bottom:1px solid var(--line);
  padding:10px 24px 20px;
  transform:translateY(-8px);opacity:0;pointer-events:none;transition:.3s var(--ease);
}
.mobile-menu.is-open{transform:none;opacity:1;pointer-events:auto}
.mobile-menu a{padding:14px 4px;border-bottom:1px solid var(--line-soft);font-size:17px;font-family:var(--f-display);font-weight:500}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:100svh;display:flex;align-items:center;
  padding:130px 0 90px;overflow:hidden;
}
.hero__canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.75}
[data-theme="light"] .hero__canvas{opacity:.55}
.hero__glow{
  position:absolute;z-index:0;pointer-events:none;
  top:-24%;right:-14%;width:820px;height:820px;border-radius:50%;
  background:radial-gradient(circle,var(--glow) 0%,transparent 62%);
  filter:blur(38px);
}
.hero__inner{position:relative;z-index:2}

.hero__eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-mono);font-size:12.5px;letter-spacing:.02em;color:var(--text-2);
  padding:8px 16px;border:1px solid var(--line);border-radius:100px;
  background:color-mix(in srgb,var(--surface) 70%,transparent);
  backdrop-filter:blur(8px);
}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--accent-2);position:relative;flex:none}
.pulse::after{content:'';position:absolute;inset:0;border-radius:50%;background:var(--accent-2);animation:ping 2s cubic-bezier(0,0,.2,1) infinite}
@keyframes ping{75%,100%{transform:scale(2.6);opacity:0}}

.hero__title{
  font-family:var(--f-display);font-weight:600;
  font-size:clamp(2.7rem,7.6vw,6rem);line-height:.99;letter-spacing:-.038em;
  margin:26px 0 0;
}
.hero__title em{
  font-style:normal;
  background:linear-gradient(105deg,var(--accent) 0%,var(--accent-3) 48%,var(--accent-2) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:200% 100%;animation:shift 9s ease-in-out infinite;
}
@keyframes shift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}

.hero__lede{
  max-width:62ch;margin-top:26px;font-size:clamp(1rem,1.45vw,1.16rem);
  color:var(--text-2);line-height:1.68;
}
.hero__lede strong{color:var(--text);font-weight:600}

.hero__cta{display:flex;flex-wrap:wrap;gap:11px;margin-top:38px}

.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 20px;border-radius:11px;font-size:14.5px;font-weight:500;
  border:1px solid var(--line);background:var(--surface);color:var(--text);
  transition:transform .22s var(--ease),border-color .22s,background .22s,box-shadow .22s;
}
.btn:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:0 10px 26px -14px var(--glow)}
.btn--primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-3));
  border-color:transparent;color:var(--on-accent);font-weight:600;
}
.btn--primary:hover{box-shadow:0 14px 32px -12px var(--glow)}
.btn--ghost{background:transparent;font-family:var(--f-mono);font-size:13.5px;color:var(--text-2)}
.btn--ghost:hover{color:var(--text)}

.hero__scroll{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:2}
.hero__scroll span{
  display:block;width:1px;height:46px;
  background:linear-gradient(var(--accent),transparent);
  animation:drop 2.2s var(--ease) infinite;transform-origin:top;
}
@keyframes drop{0%{transform:scaleY(0);opacity:0}40%{transform:scaleY(1);opacity:1}100%{transform:scaleY(1) translateY(46px);opacity:0}}

/* ---------- ticker ---------- */
.ticker{
  position:relative;z-index:2;overflow:hidden;
  border-block:1px solid var(--line-soft);background:var(--bg-alt);
  padding:16px 0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
}
.ticker__track{display:flex;width:max-content;animation:slide 46s linear infinite}
.ticker:hover .ticker__track{animation-play-state:paused}
.ticker__set{display:flex;align-items:center;gap:26px;padding-right:26px;flex:none}
.ticker__set span{font-family:var(--f-mono);font-size:13px;color:var(--text-3);white-space:nowrap}
.ticker__set b{color:var(--accent);font-weight:600}
.ticker__set i{color:var(--line);font-style:normal;font-size:9px}
@keyframes slide{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{padding:clamp(80px,11vw,140px) 0;position:relative;z-index:2}
.section--alt{background:var(--bg-alt);border-block:1px solid var(--line-soft)}

.sec-label{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--text-3);display:flex;align-items:center;gap:10px;margin-bottom:20px;
}
.sec-label span{
  color:var(--accent);border:1px solid var(--line);padding:2px 8px;border-radius:6px;
  background:var(--accent-soft);letter-spacing:.05em;
}
.sec-title{
  font-family:var(--f-display);font-weight:600;letter-spacing:-.032em;
  font-size:clamp(1.8rem,3.9vw,3.1rem);line-height:1.08;
}
.sec-title em{font-style:italic;color:var(--accent)}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;flex-wrap:wrap;margin-bottom:44px}
.sec-note{max-width:34ch;color:var(--text-3);font-size:14.5px}

/* ---------- about ---------- */
.about{display:grid;grid-template-columns:1.35fr .95fr;gap:56px;align-items:start}
.about__text p{color:var(--text-2);margin-top:18px;font-size:16.5px;line-height:1.75;max-width:60ch}
.about__text .sec-title{margin-bottom:8px}
.about__text strong{color:var(--text);font-weight:600}
.about__sign{
  margin-top:28px !important;padding-left:16px;border-left:2px solid var(--accent);
  font-family:var(--f-mono);font-size:14px !important;color:var(--text-2) !important;
}
.about__side{display:flex;flex-direction:column;gap:16px;position:sticky;top:96px}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:24px;transition:border-color .3s;
}
.card:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.card__k{
  font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--text-3);margin-bottom:18px;
}
.edu{display:flex;flex-direction:column;gap:18px}
.edu__row{display:flex;justify-content:space-between;gap:14px;align-items:flex-start}
.edu__row+.edu__row{padding-top:18px;border-top:1px solid var(--line-soft)}
.edu h3{font-family:var(--f-display);font-size:15.5px;font-weight:600;letter-spacing:-.01em}
.edu p{font-size:13.5px;color:var(--text-3);margin-top:3px}
.chip{
  font-family:var(--f-mono);font-size:11px;padding:4px 9px;border-radius:7px;white-space:nowrap;
  background:var(--surface-2);border:1px solid var(--line);color:var(--text-3);flex:none;
}
.chip--live{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 32%,transparent);color:var(--accent)}

.glance{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.glance li{display:flex;flex-direction:column;gap:2px}
.glance b{font-family:var(--f-display);font-size:26px;font-weight:600;letter-spacing:-.03em;color:var(--accent)}
.glance span{font-size:12.5px;color:var(--text-3);line-height:1.4}

/* ---------- filters ---------- */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px}
.filter{
  padding:9px 15px;border-radius:100px;border:1px solid var(--line);background:var(--surface);
  font-size:13.5px;color:var(--text-2);display:flex;align-items:center;gap:7px;
  transition:all .25s var(--ease);
}
.filter b{font-family:var(--f-mono);font-size:11px;color:var(--text-3);font-weight:500}
.filter:hover{border-color:var(--accent);color:var(--text)}
.filter.is-active{background:var(--text);color:var(--bg);border-color:var(--text)}
.filter.is-active b{color:var(--bg);opacity:.6}

/* ---------- project grid ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid__empty{text-align:center;color:var(--text-3);padding:60px 0;font-family:var(--f-mono);font-size:14px}

.proj{
  position:relative;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:26px;overflow:hidden;
  transition:transform .4s var(--ease),border-color .3s,box-shadow .4s,opacity .35s,scale .35s;
}
.proj--wide{grid-column:span 2}
.proj::before{
  content:'';position:absolute;inset:0 0 auto;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  opacity:0;transition:opacity .4s;
}
.proj:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 45%,var(--line));box-shadow:var(--shadow)}
.proj:hover::before{opacity:1}
.proj.is-hidden{display:none}

.proj__top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:18px}
.proj__idx{font-family:var(--f-mono);font-size:12px;color:var(--text-3);letter-spacing:.08em}
.proj__tags{display:flex;flex-wrap:wrap;gap:5px;justify-content:flex-end}
.proj__tags span{
  font-family:var(--f-mono);font-size:10.5px;padding:3px 7px;border-radius:5px;
  background:var(--surface-2);border:1px solid var(--line-soft);color:var(--text-3);
}
.proj__name{
  font-family:var(--f-display);font-size:clamp(1.35rem,2.1vw,1.75rem);font-weight:600;
  letter-spacing:-.028em;line-height:1.1;
}
.proj__sub{margin-top:8px;font-size:14.5px;color:var(--accent);font-weight:500;line-height:1.45}
.proj__body{margin-top:14px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.proj__body strong{color:var(--text);font-weight:600}
.proj__body em{color:var(--text-2);font-style:italic}
code{
  font-family:var(--f-mono);font-size:.88em;padding:1px 5px;border-radius:5px;
  background:var(--surface-2);border:1px solid var(--line-soft);color:var(--accent-2);
}

.metrics{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 22px;padding-top:18px;border-top:1px solid var(--line-soft)}
.metrics li{display:flex;flex-direction:column;padding-right:14px;border-right:1px solid var(--line-soft)}
.metrics li:last-child{border-right:none;padding-right:0}
.metrics b{font-family:var(--f-display);font-size:19px;font-weight:600;letter-spacing:-.025em;color:var(--text)}
.metrics span{font-family:var(--f-mono);font-size:10.5px;color:var(--text-3);letter-spacing:.02em;margin-top:1px}

.proj__link{
  margin-top:auto;display:inline-flex;align-items:center;gap:7px;align-self:flex-start;
  font-family:var(--f-mono);font-size:12.5px;color:var(--text-2);
  padding-bottom:2px;border-bottom:1px solid transparent;transition:color .2s,border-color .2s,gap .2s;
}
.proj__link:hover{color:var(--accent);border-bottom-color:var(--accent);gap:10px}

.more{
  margin-top:40px;padding-top:32px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;
}
.more p{color:var(--text-3);font-size:14.5px}
.more a:not(.btn){color:var(--accent);border-bottom:1px solid color-mix(in srgb,var(--accent) 35%,transparent)}
.more a:not(.btn):hover{border-bottom-color:var(--accent)}

/* ---------- timeline ---------- */
.timeline{display:flex;flex-direction:column;gap:24px}
.tl{
  display:grid;grid-template-columns:210px 1fr;gap:40px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:32px;transition:border-color .3s;
}
.tl:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.tl__meta{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.tl__loc{font-family:var(--f-mono);font-size:12px;color:var(--text-3)}
.tl__body h3{font-family:var(--f-display);font-size:clamp(1.25rem,2vw,1.6rem);font-weight:600;letter-spacing:-.025em}
.tl__org{color:var(--accent);font-size:14.5px;font-weight:500;margin-top:5px}
.tl__tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:20px}
.tl__tags span{
  font-family:var(--f-mono);font-size:11px;padding:4px 9px;border-radius:6px;
  background:var(--surface-2);border:1px solid var(--line-soft);color:var(--text-3);
}

.bullets{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.bullets li{
  position:relative;padding-left:22px;font-size:14.8px;color:var(--text-2);line-height:1.7;
}
.bullets li::before{
  content:'';position:absolute;left:2px;top:.66em;width:6px;height:6px;border-radius:2px;
  background:var(--accent);transform:rotate(45deg);
}
.bullets strong{color:var(--text);font-weight:600}

/* ---------- papers ---------- */
.papers{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.paper{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:30px;display:flex;flex-direction:column;transition:border-color .3s,transform .4s var(--ease);
}
.paper:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));transform:translateY(-3px)}
.paper__badge{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.paper__doi{font-family:var(--f-mono);font-size:11px;color:var(--text-3)}
.paper h3{
  font-family:var(--f-display);font-size:19px;font-weight:600;line-height:1.32;letter-spacing:-.018em;
}
.paper .bullets{flex:1;margin-bottom:22px}
.paper .bullets li{font-size:14px}

/* ---------- stack ---------- */
.stack{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stack__col{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px;
  transition:border-color .3s;
}
.stack__col:hover{border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}
.stack__col h3{
  font-family:var(--f-display);font-size:16px;font-weight:600;letter-spacing:-.015em;
  display:flex;align-items:center;gap:10px;margin-bottom:20px;
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--glow)}
.dot--2{background:var(--accent-2);box-shadow:0 0 10px rgba(255,107,53,.4)}
.dot--3{background:var(--accent-3);box-shadow:0 0 10px rgba(232,192,125,.4)}
.dot--4{background:var(--dot-4,#f0a35e);box-shadow:0 0 10px var(--dot-4-glow,rgba(240,163,94,.4))}
.pills{display:flex;flex-wrap:wrap;gap:6px}
.pills span{
  font-family:var(--f-mono);font-size:12px;padding:5px 10px;border-radius:7px;
  background:var(--surface-2);border:1px solid var(--line-soft);color:var(--text-2);
  transition:color .2s,border-color .2s,transform .2s;cursor:default;
}
.pills span:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-2px)}

/* ---------- contact ---------- */
.section--contact{
  background:
    radial-gradient(ellipse 900px 420px at 50% 0%,var(--glow),transparent 70%),
    var(--bg-alt);
  border-top:1px solid var(--line-soft);
}
.contact{text-align:center}
.contact .sec-label{justify-content:center}
.contact__title{
  font-family:var(--f-display);font-weight:600;letter-spacing:-.035em;
  font-size:clamp(2rem,4.6vw,3.6rem);line-height:1.06;
}
.contact__lede{max-width:56ch;margin:22px auto 0;color:var(--text-2);font-size:16.5px;line-height:1.7}
.contact__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:44px}
.ccard{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:22px 20px;display:flex;flex-direction:column;gap:6px;text-align:left;
  transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;
}
.ccard:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 14px 34px -18px var(--glow)}
.ccard__k{font-family:var(--f-mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--text-3)}
.ccard__v{font-size:15px;font-weight:500;word-break:break-word}
.ccard--static{cursor:default}
.ccard--static:hover{transform:none;border-color:var(--line);box-shadow:none}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line-soft);padding:30px 0;position:relative;z-index:2}
.foot__inner{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.foot p{font-family:var(--f-mono);font-size:12.5px;color:var(--text-3)}
.foot__mid{opacity:.75}
.foot__top{font-family:var(--f-mono);font-size:12.5px;color:var(--text-3);transition:color .2s}
.foot__top:hover{color:var(--accent)}

/* ---------- command palette ---------- */
.palette{position:fixed;inset:0;z-index:200;display:grid;place-items:start center;padding-top:14vh}
.palette[hidden]{display:none}
.palette__scrim{position:absolute;inset:0;background:rgba(0,0,0,.62);backdrop-filter:blur(5px);animation:fade .2s ease}
.palette__box{
  position:relative;width:min(600px,calc(100% - 40px));
  background:var(--surface);border:1px solid var(--line);border-radius:16px;
  box-shadow:0 40px 90px -30px rgba(0,0,0,.8);overflow:hidden;
  animation:pop .22s var(--ease);
}
@keyframes fade{from{opacity:0}}
@keyframes pop{from{opacity:0;transform:translateY(-12px) scale(.98)}}
.palette__search{display:flex;align-items:center;gap:11px;padding:16px 18px;border-bottom:1px solid var(--line)}
.palette__search svg{color:var(--text-3);flex:none}
.palette__search input{
  flex:1;background:none;border:none;outline:none;color:var(--text);
  font-family:var(--f-body);font-size:15.5px;
}
.palette__search input::placeholder{color:var(--text-3)}
.palette__list{max-height:min(420px,52vh);overflow-y:auto;padding:8px}
.palette__list li{
  display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:10px;cursor:pointer;
  font-size:14.5px;transition:background .15s;
}
.palette__list li.is-sel{background:var(--accent-soft)}
.palette__list li .p-kind{
  margin-left:auto;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--text-3);
}
.palette__list li .p-ico{color:var(--accent);flex:none;width:16px;text-align:center;font-size:13px}
.palette__none{padding:26px;text-align:center;color:var(--text-3);font-size:14px}

/* ---------- toast ---------- */
.toast{
  position:fixed;bottom:26px;left:50%;transform:translate(-50%,20px);z-index:210;
  padding:12px 20px;border-radius:11px;background:var(--text);color:var(--bg);
  font-size:14px;font-weight:500;opacity:0;pointer-events:none;transition:.3s var(--ease);
  box-shadow:0 14px 34px -14px rgba(0,0,0,.5);
}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.09s}
.reveal[data-delay="2"]{transition-delay:.18s}
.reveal[data-delay="3"]{transition-delay:.27s}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .proj--wide{grid-column:span 2}
  .about{grid-template-columns:1fr;gap:40px}
  .about__side{position:static;display:grid;grid-template-columns:1fr 1fr}
  .contact__grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .wrap{width:calc(100% - 36px)}
  .nav__inner{width:calc(100% - 36px)}
  .nav__links{display:none}
  .nav__burger{display:flex}
  .mobile-menu{display:flex}
  .kbd-btn span{display:none}
  .kbd-btn{padding:7px 10px}
  .grid,.papers,.stack{grid-template-columns:1fr}
  .proj--wide{grid-column:span 1}
  .about__side{grid-template-columns:1fr}
  .tl{grid-template-columns:1fr;gap:22px;padding:26px}
  .tl__meta{flex-direction:row;align-items:center;gap:14px}
  .sec-head{margin-bottom:32px}
  .sec-note{max-width:none}
  .foot__inner{justify-content:center;text-align:center}
  .foot__mid{order:3;width:100%}
}
@media (max-width:520px){
  .hero{padding-top:110px;min-height:auto}
  .hero__cta .btn{flex:1 1 auto;justify-content:center}
  .metrics li{border-right:none;padding-right:0;min-width:calc(50% - 5px)}
  .paper,.stack__col,.proj{padding:22px}
  .glance{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

@media print{
  .nav,.mobile-menu,.hero__canvas,.hero__scroll,.ticker,.palette,.toast,.scroll-progress,.grain,.filters{display:none !important}
  body{background:#fff;color:#000}
  .section{padding:24px 0;page-break-inside:avoid}
}