/* Sigmoid Vedanta Technologies
   Layout concept: the viewport is the 2D projection of a tesseract. The visitor stands in the near
   cube; the far cube (the "room" in the centre) holds the content. The four trapezoids between are
   the lateral cells and carry the instruments: navigation on the left wall, position on the right,
   brand above, hints below. Moving to another section passes you through the room into the next. */

:root {
  --bg: #090b10;
  --room: #10131b;
  --panel: #161a24;
  --fg: #f3f5f9;
  --muted: #a4adbd;
  --faint: #6b7487;
  --line: rgba(243, 245, 249, 0.14);
  --line-strong: rgba(243, 245, 249, 0.32);
  --accent: #8ab4ff;
  --accent-ink: #0a1a3a;

  --sans: "Manrope", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  /* chamber geometry */
  --edge: 18px;                              /* outer cube inset from the viewport */
  --wall-x: clamp(96px, 15vw, 250px);        /* left/right wall thickness */
  --wall-y: clamp(64px, 11vh, 120px);        /* top/bottom wall thickness */
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  color-scheme: dark;
}
@media (max-width: 799px) {
  :root { --edge: 10px; --wall-x: 14px; --wall-y: 60px; }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--sans); font-size: 1.0625rem; line-height: 1.6;
  overflow: hidden; -webkit-font-smoothing: antialiased;
}
html:not(.js) body { overflow: auto; }
::selection { background: var(--accent); color: var(--accent-ink); }
a { color: inherit; text-decoration-color: rgba(138, 180, 255, 0.5); text-underline-offset: 0.16em; }
a:hover { text-decoration-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
button { font: inherit; color: inherit; }
img, svg, canvas { max-width: 100%; }
h1, h2, h3 { margin: 0; font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; text-wrap: balance; }
h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); margin-bottom: 18px; }
h3 { font-size: 1.1rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; max-width: 60ch; }
.muted { color: var(--muted); }
.label { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.label b { color: var(--accent); font-weight: 500; }

/* ---------- The chamber ---------- */
.chamber { position: fixed; inset: 0; }
#frame { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
#frame .outer, #frame .inner { fill: none; stroke: var(--line-strong); stroke-width: 1; }
#frame .corner { stroke: var(--line-strong); stroke-width: 1; }
#frame .ring { fill: none; stroke: var(--fg); stroke-width: 1; }
#frame .ray { stroke: var(--fg); stroke-width: 1; }
#frame .wall { fill: url(#wallgrad); }
#frame.pulse .corner, #frame.pulse .ring { animation: pulse 0.8s ease-out; }
@keyframes pulse { 0% { stroke: var(--accent); } 100% { stroke: var(--line-strong); } }

/* the far cube */
.room {
  position: absolute;
  left: calc(var(--wall-x) + var(--edge) + var(--safe-l)); right: calc(var(--wall-x) + var(--edge) + var(--safe-r));
  top: calc(var(--wall-y) + var(--edge)); bottom: calc(var(--wall-y) + var(--edge));
  background: var(--room); border: 1px solid var(--line-strong);
  overflow: hidden;
}
.cell {
  position: absolute; inset: 0; overflow: auto; overscroll-behavior: contain;
  padding: clamp(22px, 4vw, 52px);
  padding-left: max(22px, 4vw, var(--safe-l)); padding-right: max(22px, 4vw, var(--safe-r));
  opacity: 0; transform: scale(0.76); pointer-events: none; visibility: hidden;
  transition: opacity 0.65s cubic-bezier(.3,.7,.2,1), transform 0.65s cubic-bezier(.3,.7,.2,1), visibility 0s linear 0.65s;
  scrollbar-width: thin; scrollbar-color: var(--faint) transparent;
}
.cell.active { opacity: 1; transform: none; pointer-events: auto; visibility: visible; transition-delay: 0s; }
.cell.leave-fwd { opacity: 0; transform: scale(1.28); }
.cell.leave-back { opacity: 0; transform: scale(0.76); }
.cell.enter-back { transform: scale(1.28); }
.cell .in { max-width: 1080px; margin: 0 auto; min-height: 100%; display: flex; flex-direction: column; justify-content: center; }
html:not(.js) .cell { position: static; opacity: 1; transform: none; visibility: visible; pointer-events: auto; border-bottom: 1px solid var(--line); }
html:not(.js) .room { position: static; }
html:not(.js) .wall, html:not(.js) #frame { display: none; }
@media (prefers-reduced-motion: reduce) {
  .cell { transition: opacity 0.4s, visibility 0s linear 0.4s; transform: none !important; }
  #frame.pulse .corner, #frame.pulse .ring { animation: none; }
}

/* ---------- Walls (lateral cells) ---------- */
.wall { position: absolute; pointer-events: none; display: flex; }
.wall > * { pointer-events: auto; }
.wall-top { left: calc(var(--edge) + var(--safe-l)); right: calc(var(--edge) + var(--safe-r)); top: var(--edge); height: var(--wall-y); align-items: center; justify-content: space-between; padding: 0 22px; }
.wall-bottom { left: calc(var(--edge) + var(--safe-l)); right: calc(var(--edge) + var(--safe-r)); bottom: var(--edge); height: var(--wall-y); align-items: center; justify-content: space-between; padding: 0 22px; padding-bottom: env(safe-area-inset-bottom, 0px); }
.wall-left { left: calc(var(--edge) + var(--safe-l)); top: calc(var(--edge) + var(--wall-y)); bottom: calc(var(--edge) + var(--wall-y)); width: var(--wall-x); align-items: center; justify-content: center; perspective: 700px; }
.wall-right { right: calc(var(--edge) + var(--safe-r)); top: calc(var(--edge) + var(--wall-y)); bottom: calc(var(--edge) + var(--wall-y)); width: var(--wall-x); align-items: center; justify-content: center; perspective: 700px; }
@media (max-width: 799px) { .wall-left, .wall-right { display: none; } }

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--fg); font-weight: 700; letter-spacing: -0.01em; font-size: 0.98rem; }
.brand .mark { width: 26px; height: 26px; color: var(--accent); flex: none; }
.brand small { font-family: var(--mono); font-weight: 400; font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-left: 4px; }
@media (max-width: 480px) { .brand small { display: none; } }
.wall-top .mail { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--muted); text-decoration: none; }
.wall-top .mail:hover { color: var(--accent); }
@media (max-width: 599px) { .wall-top .mail { display: none; } }

/* navigation, lying on the left wall */
.nav { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; transform: rotateY(28deg); transform-origin: right center; }
.nav a {
  display: grid; grid-template-columns: 2.4ch 1fr; gap: 10px; align-items: baseline;
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--faint); text-decoration: none; padding: 4px 6px; border-left: 1px solid transparent; transition: color 0.3s, border-color 0.3s;
}
.nav a:hover { color: var(--fg); }
.nav a.active { color: var(--fg); border-left-color: var(--accent); }
.nav a.active span:first-child { color: var(--accent); }
@media (max-width: 1100px) { .nav a span:last-child { display: none; } .nav a { grid-template-columns: 1fr; } }

/* instruments on the right wall */
.inst { transform: rotateY(-28deg); transform-origin: left center; text-align: center; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--faint); display: grid; gap: 14px; justify-items: center; }
.inst canvas { width: 92px; height: 92px; }
.inst output { display: block; color: var(--fg); font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.inst .coord { color: var(--muted); letter-spacing: 0.04em; text-transform: none; }
@media (max-width: 1100px) { .inst canvas { width: 64px; height: 64px; } .inst .coord { display: none; } }

/* bottom wall: hints and counter */
.hint { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); }
.hint kbd { font: inherit; border: 1px solid var(--line); padding: 1px 6px; color: var(--muted); }
.counter { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; color: var(--muted); display: flex; align-items: center; gap: 14px; }
.counter b { color: var(--fg); font-weight: 500; }
.dots { display: flex; gap: 8px; }
.dots a { width: 8px; height: 8px; border: 1px solid var(--faint); display: block; transform: rotate(45deg); }
.dots a.active { background: var(--accent); border-color: var(--accent); }
.arrows { display: flex; gap: 8px; }
.arrows button { width: 36px; height: 36px; border: 1px solid var(--line); background: transparent; display: grid; place-items: center; transition: border-color 0.3s, color 0.3s; }
.arrows button:hover { border-color: var(--accent); color: var(--accent); }
.arrows svg { width: 14px; height: 14px; }
@media (max-width: 599px) { .hint { display: none; } }

/* ---------- Shared content pieces ---------- */
.eyebrow { margin-bottom: 22px; display: flex; flex-wrap: wrap; gap: 6px 16px; }
.lede { font-size: clamp(1.1rem, 1.1vw + 0.8rem, 1.4rem); line-height: 1.5; font-weight: 500; color: var(--fg); max-width: 40ch; }
.lede em { font-style: normal; color: var(--accent); }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 13px 20px; border: 1px solid var(--accent); color: var(--accent); background: transparent; transition: background 0.25s, color 0.25s;
}
.btn:hover { background: var(--accent); color: var(--accent-ink); }
.btn.solid { background: var(--accent); color: var(--accent-ink); }
.btn.solid:hover { background: #a9c8ff; }
.btn.ghost { border-color: var(--line-strong); color: var(--fg); }
.btn.ghost:hover { background: var(--fg); color: var(--bg); }
.two { display: grid; gap: 28px; }
@media (min-width: 800px) { .two { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: center; } }
.two > * { min-width: 0; }

/* 01 Origin */
.wordmark { font-size: clamp(2.3rem, 5.6vw, 5rem); font-weight: 800; letter-spacing: -0.035em; line-height: 0.98; margin-bottom: 8px; }
.wordmark span { display: block; }
.wordmark .thin { font-weight: 300; color: var(--muted); }
.tech { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.34em; text-transform: uppercase; color: var(--accent); margin-bottom: 28px; }
.origin-grid { display: grid; gap: 28px; }
@media (min-width: 900px) { .origin-grid { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 56px; align-items: end; } }
.origin-grid > * { min-width: 0; }
.where { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--muted); margin-top: 26px; }

/* 02 Thesis */
.axes-poem { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: clamp(1.05rem, 1.6vw, 1.35rem); font-weight: 600; }
.axes-poem li { display: grid; grid-template-columns: 2ch 1fr; gap: 14px; align-items: baseline; border-bottom: 1px solid var(--line); padding: 8px 0; }
.axes-poem li span:first-child { font-family: var(--mono); font-size: 0.8em; color: var(--faint); font-weight: 400; }
.axes-poem li.w, .axes-poem li.w span:first-child { color: var(--accent); }

/* 03 Axes (services) */
.axes { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 640px) { .axes { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .axes { grid-template-columns: repeat(4, 1fr); } }
.axis { background: var(--panel); padding: 22px 20px 24px; min-width: 0; }
.axis .glyph { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.axis h3 { margin-bottom: 10px; }
.axis p { font-size: 0.95rem; color: var(--muted); margin-bottom: 14px; }
.axis ul { list-style: none; padding: 0; margin: 0; font-size: 0.86rem; color: var(--fg); display: grid; gap: 5px; }
.axis ul li { padding-left: 14px; position: relative; }
.axis ul li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 5px; height: 5px; border: 1px solid var(--faint); transform: rotate(45deg); }

/* 04 Cells (work) */
.work { display: grid; gap: 14px; }
@media (min-width: 800px) { .work { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.proj { background: var(--panel); border: 1px solid var(--line); padding: 22px 20px; display: flex; flex-direction: column; min-width: 0; }
.proj .num { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.proj h3 { margin-bottom: 4px; }
.proj .url { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); text-decoration: none; }
a.url:hover { color: var(--accent); text-decoration: underline; }
.proj .desc { font-size: 0.94rem; color: var(--muted); margin: 12px 0 14px; }
.proj .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.proj .tags span { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.08em; text-transform: uppercase; border: 1px solid var(--line); padding: 3px 7px; color: var(--muted); }
.proj .say { margin-top: auto; background: transparent; border: 1px solid var(--line-strong); padding: 9px 12px; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg); text-align: left; display: flex; justify-content: space-between; gap: 8px; transition: border-color 0.25s, color 0.25s; }
.proj .say:hover, .proj .say[aria-expanded="true"] { border-color: var(--accent); color: var(--accent); }
.proj .say::after { content: "+"; }
.proj .say[aria-expanded="true"]::after { content: "\2212"; }
.proj blockquote { margin: 14px 0 0; padding: 14px 0 0; border-top: 1px solid var(--line); font-size: 0.94rem; line-height: 1.55; color: var(--fg); }
.proj blockquote footer { margin-top: 10px; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; color: var(--muted); }
.proj blockquote footer b { color: var(--accent); font-weight: 500; display: block; }

/* 05 Unfolding */
.net { width: 100%; max-height: 52vh; height: auto; overflow: visible; display: block; }
.net polygon { stroke: var(--line-strong); stroke-width: 1; fill: rgba(243, 245, 249, 0.03); transition: fill 0.3s, stroke 0.3s; }
.net polygon.top { fill: rgba(243, 245, 249, 0.08); }
.net g.on polygon { stroke: var(--accent); fill: rgba(138, 180, 255, 0.16); }
.net g.on polygon.top { fill: var(--accent); }
.net text { font-family: var(--mono); font-size: 13px; fill: var(--muted); text-anchor: middle; dominant-baseline: middle; pointer-events: none; }
.net g.on text { fill: var(--accent-ink); font-weight: 600; }
.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; display: grid; gap: 2px; }
@media (min-width: 1100px) { .steps { grid-template-columns: 1fr 1fr; gap: 2px 18px; } }
.steps li { counter-increment: step; display: grid; grid-template-columns: 2.6ch 1fr; gap: 12px; align-items: baseline; padding: 9px 8px; border-left: 1px solid var(--line); transition: background 0.3s, border-color 0.3s; }
.steps li::before { content: counter(step, decimal-leading-zero); font-family: var(--mono); font-size: 0.7rem; color: var(--faint); }
.steps li.on, .steps li:hover { background: rgba(138, 180, 255, 0.08); border-left-color: var(--accent); }
.steps li.on::before { color: var(--accent); }
.steps h3 { font-size: 0.98rem; margin-bottom: 2px; }
.steps p { font-size: 0.88rem; color: var(--muted); margin: 0; }

/* 06 Rotate */
.lab-stage { position: relative; aspect-ratio: 1 / 1; max-height: 56vh; margin: 0 auto; width: 100%; border: 1px solid var(--line); background: var(--bg); }
.lab-stage canvas { width: 100%; height: 100%; display: block; }
.lab-stage .corner { position: absolute; font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em; color: var(--faint); text-transform: uppercase; }
.lab-stage .corner.tl { top: 8px; left: 10px; } .lab-stage .corner.br { bottom: 8px; right: 10px; }
.sliders { display: grid; gap: 14px; margin: 20px 0; }
.sliders label { display: grid; grid-template-columns: 5ch 1fr 5ch; gap: 12px; align-items: center; font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.06em; color: var(--muted); }
.sliders label output { text-align: right; color: var(--fg); font-variant-numeric: tabular-nums; }
.sliders input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 2px; background: var(--line-strong); margin: 0; }
.sliders input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--accent); border: 0; transform: rotate(45deg); }
.sliders input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; background: var(--accent); border: 0; border-radius: 0; transform: rotate(45deg); }
.lab-ctl { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; border: 1px solid var(--line-strong); background: transparent; padding: 9px 14px; transition: border-color 0.25s, color 0.25s; }
.chip:hover, .chip[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 22px; }
.facts div { background: var(--panel); padding: 12px 8px; text-align: center; min-width: 0; }
.facts b { display: block; font-weight: 800; font-size: clamp(1.3rem, 2.2vw, 1.9rem); line-height: 1; color: var(--fg); }
.facts span { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }

/* 07 Locus */
.name-parts { display: grid; gap: 16px; }
.name-parts div { border-top: 1px solid var(--line); padding-top: 12px; }
.name-parts h3 { font-size: 1.4rem; color: var(--accent); margin-bottom: 6px; }
.name-parts p { color: var(--muted); font-size: 0.95rem; margin: 0; }
dl.reg { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 10px 20px; font-size: 0.95rem; }
dl.reg dt { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); padding-top: 4px; }
dl.reg dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }
dl.reg dd code { font-family: var(--mono); font-size: 0.85em; color: var(--accent); }

/* 08 Signal */
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; border-top: 1px solid var(--line); padding: 14px 0; min-width: 0; }
.contact-list li:last-child { border-bottom: 1px solid var(--line); }
.contact-list .k { display: block; margin-bottom: 4px; }
.contact-list .v { font-weight: 700; font-size: clamp(1rem, 1.6vw, 1.3rem); letter-spacing: -0.01em; text-decoration: none; overflow-wrap: anywhere; }
.contact-list .v:hover { color: var(--accent); }
.contact-list address { font-style: normal; font-size: 0.98rem; }
.copy { font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; border: 1px solid var(--line-strong); background: transparent; padding: 8px 12px; white-space: nowrap; transition: border-color 0.25s, color 0.25s; }
.copy:hover { border-color: var(--accent); color: var(--accent); }
.copy[data-done="1"] { border-color: var(--accent); color: var(--accent); }
.signal-big { font-size: clamp(1.7rem, 3.4vw, 3rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.05; margin-bottom: 18px; }
.signal-big em { font-style: normal; color: var(--accent); }

/* 404 */
.lost { position: relative; z-index: 1; height: 100%; display: grid; place-items: center; text-align: center; padding: 40px 20px; }
.lost h1 { font-size: clamp(2rem, 6vw, 4rem); margin-bottom: 16px; }
.lost p { margin-inline: auto; }
#space { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }