/* =========================================================================
   Starktrace Labs — immersive site styles
   ========================================================================= */

:root {
  --bg:        #06070d;
  --bg-2:      #0b0d18;
  --ink:       #eef0fb;
  --ink-dim:   #a2a8c2;
  --ink-mute:  #6b7290;
  --line:      rgba(255,255,255,0.08);
  --line-2:    rgba(255,255,255,0.16);

  /* brand */
  --indigo:    #645FE6;   /* primary blue-violet */
  --violet:    #713ED1;   /* primary purple */
  --indigo-2:  #8A7BFF;   /* light indigo highlight */
  --violet-2:  #A07BFF;   /* light violet highlight */
  --violet-3:  #3F1F8C;   /* deep violet */
  --accent:    #C9C7F4;   /* near-white tint for cool details */

  /* legacy aliases (keep so older rules don't break) */
  --purple:    var(--violet);
  --purple-2:  var(--indigo-2);
  --purple-3:  var(--violet-3);
  --blue:      var(--indigo);

  --grad: linear-gradient(135deg, #8A7BFF 0%, #645FE6 45%, #713ED1 100%);
  --grad-soft: linear-gradient(135deg, rgba(100,95,230,.18), rgba(113,62,209,.18));

  --ease: cubic-bezier(.2,.7,.2,1);
  --ease-out: cubic-bezier(.16,1,.3,1);

  --pad-x: clamp(20px, 4vw, 56px);
  --pad-y: clamp(80px, 12vh, 160px);
  --maxw: 1280px;

  color-scheme: dark;
}

/* reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: 'Space Grotesk', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-feature-settings: 'ss01','ss02';
  color: var(--ink);
  background: radial-gradient(1200px 800px at 80% -10%, #1a1247 0%, transparent 60%),
              radial-gradient(900px 700px at -10% 30%, #131a4a 0%, transparent 60%),
              var(--bg);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.55;
  letter-spacing: .005em;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

/* hi-DPI / retina hairlines */
@media (min-resolution: 1.5dppx), (-webkit-min-device-pixel-ratio: 1.5) {
  :root { --line: rgba(255,255,255,0.07); --line-2: rgba(255,255,255,0.13); }
}

/* layered backgrounds -------------------------------------------------- */
#bg-scene {
  position: fixed; inset: 0;
  width: 100vw; height: 100vh;
  z-index: -3;
  display: block;
}
.grid-overlay {
  position: fixed; inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(to right,  rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 80%);
          mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 80%);
}
.vignette {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 0%, transparent 40%, rgba(0,0,0,.55) 100%),
    radial-gradient(ellipse at 50% 100%, transparent 40%, rgba(0,0,0,.55) 100%);
}

/* typography ----------------------------------------------------------- */
h1, h2, h3 { font-weight: 700; letter-spacing: -.02em; line-height: 1.05; margin: 0 0 .35em; }
h1 { font-size: clamp(2.6rem, 6.5vw, 5.6rem); }
h2 { font-size: clamp(2rem, 4.4vw, 3.6rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.4rem); letter-spacing: -.005em; }
p  { margin: 0 0 1em; color: var(--ink-dim); }
.lead { font-size: clamp(1rem, 1.25vw, 1.15rem); color: var(--ink-dim); max-width: 60ch; }

.grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.outline {
  -webkit-text-stroke: 1.5px rgba(255,255,255,.55);
  color: transparent;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .78rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-dim); margin: 0 0 1.2rem;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 999px;
  background: var(--indigo-2);
  box-shadow: 0 0 0 4px rgba(100,95,230,.18), 0 0 20px var(--indigo-2);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%,100% { transform: scale(1);   opacity: 1; }
  50%     { transform: scale(1.4); opacity: .55; }
}
.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; color: var(--ink-mute); font-size: .8rem; }

/* buttons -------------------------------------------------------------- */
.btn {
  --h: 46px;
  display: inline-flex; align-items: center; gap: .55em; justify-content: center;
  height: var(--h); padding: 0 1.25rem;
  border-radius: 999px;
  font-weight: 600; font-size: .95rem; letter-spacing: .01em;
  border: 1px solid transparent;
  transition: transform .25s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease), box-shadow .3s var(--ease);
  cursor: pointer; -webkit-user-select: none; user-select: none;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  color: white; background: var(--grad);
  box-shadow: 0 10px 40px -10px rgba(113,62,209,.55), inset 0 0 0 1px rgba(255,255,255,.18);
}
.btn--primary:hover { box-shadow: 0 14px 50px -10px rgba(113,62,209,.7), inset 0 0 0 1px rgba(255,255,255,.32); }

.btn--ghost {
  color: var(--ink); background: rgba(255,255,255,.04);
  border-color: var(--line-2); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.32); }

/* nav ------------------------------------------------------------------ */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 14px var(--pad-x);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
          backdrop-filter: blur(14px) saturate(140%);
  background: linear-gradient(to bottom, rgba(6,7,13,.75), rgba(6,7,13,.35));
  border-bottom: 1px solid var(--line);
}
.nav__brand { display: inline-flex; align-items: center; gap: .7rem; }
.nav__mark { width: 28px; height: 32px; filter: drop-shadow(0 4px 14px rgba(113,62,209,.45)); }
.nav__word {
  display: inline-flex; flex-direction: column; line-height: 1;
  font-weight: 700; letter-spacing: .14em; font-size: .82rem;
}
.nav__word small {
  font-size: .58rem; letter-spacing: .5em; color: var(--ink-dim); margin-top: 3px; padding-left: 1px;
  font-weight: 500;
}
.nav__links { display: flex; gap: 1.5rem; margin-left: auto; }
.nav__links a {
  font-size: .92rem; color: var(--ink-dim); position: relative;
  transition: color .25s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 1px; background: var(--grad); transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav__links a:hover::after { transform: scaleX(1); }
.nav .btn { margin-left: 0; }
@media (max-width: 820px) {
  .nav__links { display: none; }
  .nav .btn { margin-left: auto; }
}

/* sections ------------------------------------------------------------- */
.section {
  position: relative;
  padding: var(--pad-y) var(--pad-x);
  max-width: var(--maxw);
  margin: 0 auto;
}
.section__head { max-width: 820px; margin: 0 auto var(--pad-y) auto; text-align: center; }
.section__head .eyebrow { justify-content: center; }

/* HERO ----------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  align-items: center;
  gap: clamp(20px, 4vw, 80px);
  padding: clamp(40px, 8vh, 80px) var(--pad-x) calc(var(--pad-y) - 20px);
  max-width: var(--maxw);
  margin: 0 auto;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 32px; }
  .hero__mark { order: -1; max-width: 320px; margin: 0 auto; }
}

.hero__copy h1 { margin-bottom: .25em; }
.hero__copy .lead { margin: 1.1rem 0 1.8rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 3rem; }

.hero__stats {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.hero__stats li {
  background: rgba(11,13,24,.55);
  padding: 1rem 1.1rem;
  display: flex; flex-direction: column; gap: .25rem;
}
.hero__stats b {
  font-size: clamp(1.4rem, 2.2vw, 1.85rem); font-weight: 700;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__stats span { font-size: .78rem; color: var(--ink-dim); letter-spacing: .04em; }

.hero__mark {
  position: relative;
  display: grid; place-items: center;
  filter: drop-shadow(0 30px 80px rgba(113,62,209,.35));
  animation: float 8s var(--ease) infinite;
}
.hero__mark img { width: min(520px, 100%); transform-origin: 50% 50%; }
.hero__mark::before {
  content: ''; position: absolute; inset: -10% -8%;
  background: radial-gradient(closest-side, rgba(100,95,230,.35), transparent 70%);
  filter: blur(24px); z-index: -1;
}
@keyframes float {
  0%,100% { transform: translateY(0)   rotate(0deg); }
  50%     { transform: translateY(-14px) rotate(.6deg); }
}

.scroll-cue {
  position: absolute; left: var(--pad-x); bottom: 28px;
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .72rem; letter-spacing: .3em; text-transform: uppercase; color: var(--ink-mute);
}
.scroll-cue span {
  width: 1px; height: 36px; background: linear-gradient(to bottom, transparent, var(--ink-dim), transparent);
  display: inline-block; animation: cue 2.2s var(--ease) infinite;
}
@keyframes cue {
  0%   { transform: translateY(-10px); opacity: 0; }
  40%  { opacity: 1; }
  100% { transform: translateY(10px);  opacity: 0; }
}

/* CARDS ---------------------------------------------------------------- */
.cards {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
  position: relative;
  padding: 1.6rem 1.5rem 1.8rem;
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(20,16,40,.7), rgba(8,10,22,.6));
  border: 1px solid var(--line);
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
  isolation: isolate;
}
.card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(400px 200px at var(--mx,50%) var(--my,0%), rgba(100,95,230,.20), transparent 60%);
  opacity: 0; transition: opacity .4s var(--ease); pointer-events: none;
}
.card::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .4s var(--ease); pointer-events: none;
}
.card:hover { transform: translateY(-4px); border-color: transparent; box-shadow: 0 30px 60px -30px rgba(113,62,209,.45); }
.card:hover::before, .card:hover::after { opacity: 1; }

.card__num {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .8rem; color: var(--ink-mute); letter-spacing: .25em;
  margin-bottom: 1.4rem;
}
.card h3 { margin-bottom: .5rem; }
.card p { margin-bottom: 1rem; }
.card ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: .35rem;
}
.card ul li {
  font-size: .78rem; padding: .25rem .65rem;
  border: 1px solid var(--line-2); border-radius: 999px;
  color: var(--ink-dim); background: rgba(255,255,255,.02);
}

/* MANIFESTO ------------------------------------------------------------ */
.manifesto {
  position: relative;
  padding-block: calc(var(--pad-y) * 1.2);
  text-align: center;
  overflow: hidden;
}
.manifesto__inner { position: relative; max-width: 920px; margin: 0 auto; z-index: 2; }
.manifesto__line { font-size: clamp(2.2rem, 5.4vw, 4.6rem); }
.parallax-stack { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.px {
  position: absolute; border-radius: 50%; filter: blur(60px); opacity: .55;
  will-change: transform;
}
.px--1 { top: 5%;  left: 8%;  width: 320px; height: 320px; background: radial-gradient(circle, #713ED1, transparent 70%); }
.px--2 { top: 30%; right: 5%; width: 420px; height: 420px; background: radial-gradient(circle, #645FE6, transparent 70%); opacity: .35;}
.px--3 { bottom: 0; left: 35%; width: 500px; height: 500px; background: radial-gradient(circle, #8A7BFF, transparent 70%); opacity: .25;}

/* LABS ----------------------------------------------------------------- */
.labs {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.lab {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(20,16,40,.55), rgba(8,10,22,.55));
  padding: 1.8rem;
  overflow: hidden;
  transition: border-color .4s var(--ease), transform .4s var(--ease);
}
.lab:hover { border-color: var(--line-2); transform: translateY(-3px); }
.lab__visual {
  position: relative; width: 100%; aspect-ratio: 16/10;
  border-radius: 14px; margin-bottom: 1.4rem;
  background: radial-gradient(ellipse at 50% 60%, rgba(100,95,230,.15), transparent 60%), #06070d;
  border: 1px solid var(--line);
  overflow: hidden; display: grid; place-items: center;
}
.lab__visual--core .core {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 60px 8px rgba(113,62,209,.7), inset 0 0 18px rgba(255,255,255,.4);
  animation: corePulse 3.4s var(--ease) infinite;
}
.lab__visual--core .ring {
  position: absolute; border-radius: 50%; border: 1px solid rgba(138,123,255,.35);
  animation: spin 12s linear infinite;
}
.lab__visual--core .r1 { width: 46%; aspect-ratio: 1; border-color: rgba(138,123,255,.55); }
.lab__visual--core .r2 { width: 70%; aspect-ratio: 1; border-style: dashed; animation-duration: 22s; animation-direction: reverse; }
.lab__visual--core .r3 { width: 92%; aspect-ratio: 1; border-color: rgba(100,95,230,.35); animation-duration: 30s; }
@keyframes corePulse {
  0%,100% { box-shadow: 0 0 60px 8px rgba(113,62,209,.7),  inset 0 0 18px rgba(255,255,255,.4); }
  50%     { box-shadow: 0 0 90px 16px rgba(100,95,230,.6), inset 0 0 22px rgba(255,255,255,.6); }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* iso cube */
.lab__visual--grid .cube {
  --s: 90px;
  position: relative; width: var(--s); height: var(--s);
  transform-style: preserve-3d;
  transform: rotateX(-22deg) rotateY(38deg);
  animation: cubeSpin 14s linear infinite;
}
.lab__visual--grid .cube span {
  position: absolute; inset: 0;
  border: 1px solid rgba(138,123,255,.55);
  background: linear-gradient(135deg, rgba(113,62,209,.18), rgba(100,95,230,.06));
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
}
.lab__visual--grid .cube span:nth-child(1){ transform: translateZ(calc(var(--s)/2)); }
.lab__visual--grid .cube span:nth-child(2){ transform: rotateY(180deg) translateZ(calc(var(--s)/2)); }
.lab__visual--grid .cube span:nth-child(3){ transform: rotateY( 90deg) translateZ(calc(var(--s)/2)); }
.lab__visual--grid .cube span:nth-child(4){ transform: rotateY(-90deg) translateZ(calc(var(--s)/2)); }
.lab__visual--grid .cube span:nth-child(5){ transform: rotateX( 90deg) translateZ(calc(var(--s)/2)); }
.lab__visual--grid .cube span:nth-child(6){ transform: rotateX(-90deg) translateZ(calc(var(--s)/2)); }
@keyframes cubeSpin {
  0%   { transform: rotateX(-22deg) rotateY(0deg); }
  100% { transform: rotateX(-22deg) rotateY(360deg); }
}

/* waves */
.lab__visual--wave svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.lab__visual--wave svg path {
  fill: none; stroke: url(#none); stroke-width: 1.2;
  stroke: rgba(138,123,255,.6);
  stroke-dasharray: 4 4;
  animation: waveShift 6s linear infinite;
}
.lab__visual--wave svg:nth-child(2) path {
  stroke: rgba(100,95,230,.5); animation-duration: 9s; animation-direction: reverse;
}
@keyframes waveShift { to { stroke-dashoffset: -120; } }

.lab h3 { margin-bottom: .35rem; }

/* MARQUEE -------------------------------------------------------------- */
.section--stack { padding-bottom: calc(var(--pad-y) * .8); }
.marquee {
  position: relative; overflow: hidden; padding: 1.4rem 0;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: inline-flex; gap: 1.6rem; white-space: nowrap;
  animation: scroll-x 38s linear infinite;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 1.1rem; color: var(--ink-dim); letter-spacing: .14em; text-transform: uppercase;
}
.marquee__track span:nth-child(odd) { color: var(--ink); }
@keyframes scroll-x { to { transform: translateX(-50%); } }

/* CONTACT -------------------------------------------------------------- */
.section--contact { padding-top: calc(var(--pad-y) * .8); }
.contact {
  max-width: 760px; margin: 0 auto; text-align: center;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(28px, 5vw, 56px);
  background:
    radial-gradient(800px 400px at 50% -10%, rgba(113,62,209,.18), transparent 60%),
    linear-gradient(180deg, rgba(20,16,40,.65), rgba(8,10,22,.65));
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.contact .lead { margin-left: auto; margin-right: auto; margin-bottom: 2rem; }
.contact__form {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  text-align: left;
}
.contact__form .full { grid-column: 1 / -1; }
.contact__form label { display: flex; flex-direction: column; gap: .35rem; }
.contact__form span {
  font-size: .72rem; color: var(--ink-dim); letter-spacing: .14em; text-transform: uppercase;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}
.contact__form input,
.contact__form textarea {
  font: inherit; color: var(--ink);
  background: rgba(255,255,255,.03);
  border: 1px solid var(--line-2); border-radius: 12px;
  padding: .85rem 1rem;
  transition: border-color .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease);
  resize: vertical;
}
.contact__form input:focus,
.contact__form textarea:focus {
  outline: none; border-color: var(--indigo-2);
  background: rgba(255,255,255,.06);
  box-shadow: 0 0 0 4px rgba(100,95,230,.20);
}
.contact__form button { grid-column: 1 / -1; justify-self: center; margin-top: .4rem; }
.contact__ack { grid-column: 1 / -1; text-align: center; color: var(--indigo-2); margin: 0; }
@media (max-width: 600px) { .contact__form { grid-template-columns: 1fr; } }

/* FOOTER --------------------------------------------------------------- */
.foot {
  margin-top: 60px;
  border-top: 1px solid var(--line);
  background: linear-gradient(to bottom, transparent, rgba(0,0,0,.4));
}
.foot__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 28px var(--pad-x);
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.foot__mark { width: 22px; height: 26px; opacity: .85; }
.foot__inner p { margin: 0; color: var(--ink-mute); font-size: .85rem; }
.foot__inner p:nth-of-type(1) { margin-right: auto; }

/* reveal on scroll ----------------------------------------------------- */
[data-reveal] {
  opacity: 0; transform: translateY(28px) translateZ(0);
  transition: opacity .9s var(--ease-out), transform .9s var(--ease-out);
  will-change: transform, opacity;
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* tilt cards (JS sets vars) ------------------------------------------- */
.tilt {
  transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform .25s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}

/* reduced motion ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__mark { animation: none; }
}