/* ============================================================
   PRISM — OS-009 marketing site
   Theme: spectral refraction, measurement science, deep void.
   Custom, not shared with graphonomous.com or any other site.
   ============================================================ */

:root {
  --void: #05060a;
  --void-2: #0a0c14;
  --void-3: #12151f;
  --ink: #f5f3ee;
  --ink-dim: #a9a7b5;
  --ink-mute: #56556b;
  --rule: rgba(255, 255, 255, 0.08);
  --rule-soft: rgba(255, 255, 255, 0.04);

  --violet: #8b5cf6;
  --indigo: #6366f1;
  --blue: #3b82f6;
  --cyan: #06b6d4;
  --teal: #14b8a6;
  --green: #84cc16;
  --yellow: #facc15;
  --orange: #f59e0b;
  --red: #f43f5e;

  --serif: "Fraunces", "Playfair Display", Georgia, serif;
  --mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;

  --measure: 68ch;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-y: clamp(5rem, 10vw, 9rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; scroll-behavior: smooth; overflow-x: clip; }
body { overflow-x: clip; }

.prism-root {
  background:
    radial-gradient(1200px 800px at 20% -10%, rgba(139, 92, 246, 0.18), transparent 60%),
    radial-gradient(900px 700px at 110% 0%, rgba(6, 182, 212, 0.12), transparent 55%),
    var(--void);
  color: var(--ink);
  overflow-x: clip;
}

.prism-body {
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.65;
  min-height: 100vh;
  background-image:
    linear-gradient(to right, var(--rule-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule-soft) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: -1px -1px;
}

.prism-body::selection,
.prism-body ::selection { background: var(--yellow); color: var(--void); }

a { color: var(--ink); text-decoration: none; }

/* ---------- page shell ---------- */
.prism-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- topbar ---------- */
.prism-topbar {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  padding: 1.5rem 0 1.25rem;
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(5, 6, 10, 0.86);
  backdrop-filter: blur(10px);
  /* Break out of .prism-page 1180px container so the background spans the full viewport. */
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding-left: calc(50vw - 50%);
  padding-right: calc(50vw - 50%);
}

.prism-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: 0.08em;
}
.prism-mark__glyph { width: 28px; height: 28px; }
.prism-mark__word { font-size: 1.05rem; letter-spacing: 0.24em; }

.prism-nav {
  display: flex;
  gap: 1.75rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--ink-dim);
  margin-left: auto;
}
.prism-nav a { transition: color 0.2s; }
.prism-nav a:hover { color: var(--ink); }

.prism-topbar__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.prism-pill {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-dim);
}

.prism-cta-mini {
  font-size: 0.8rem;
  color: var(--yellow);
  letter-spacing: 0.05em;
}

/* ---------- hero ---------- */
.prism-hero {
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 6rem);
  position: relative;
}
.prism-hero__rule {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  color: var(--ink-mute);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.prism-hero__rule::before {
  content: "";
  display: block;
  width: 42px;
  height: 1px;
  background: linear-gradient(to right, var(--violet), var(--cyan));
}

.prism-hero__title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.6rem, 6vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 18ch;
}
.prism-hero__line { display: block; }
.prism-hero__line--spectral {
  font-style: italic;
  font-weight: 500;
  background: linear-gradient(92deg,
    var(--violet) 0%,
    var(--indigo) 18%,
    var(--blue) 32%,
    var(--cyan) 46%,
    var(--teal) 58%,
    var(--green) 70%,
    var(--yellow) 82%,
    var(--orange) 94%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.prism-hero__lede {
  margin-top: 2rem;
  max-width: var(--measure);
  color: var(--ink-dim);
  font-size: 1.02rem;
  line-height: 1.75;
}
.prism-hero__lede strong { color: var(--ink); font-weight: 500; }

.prism-hero__ctas {
  margin-top: 2.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.prism-cta {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  padding: 0.85rem 1.4rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--ink);
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.prism-cta:hover { border-color: var(--cyan); color: var(--cyan); }
.prism-cta--primary {
  background: linear-gradient(92deg, var(--violet), var(--cyan));
  color: var(--void);
  border-color: transparent;
  font-weight: 500;
}
.prism-cta--primary:hover { filter: brightness(1.12); color: var(--void); }

.prism-spectrum {
  display: flex;
  margin-top: 4rem;
  gap: 2px;
  height: 10px;
  max-width: 520px;
}
.prism-spectrum span {
  flex: 1;
  border-radius: 1px;
}
.prism-spectrum span:nth-child(1) { background: var(--violet); }
.prism-spectrum span:nth-child(2) { background: var(--indigo); }
.prism-spectrum span:nth-child(3) { background: var(--blue); }
.prism-spectrum span:nth-child(4) { background: var(--cyan); }
.prism-spectrum span:nth-child(5) { background: var(--teal); }
.prism-spectrum span:nth-child(6) { background: var(--green); }
.prism-spectrum span:nth-child(7) { background: var(--yellow); }
.prism-spectrum span:nth-child(8) { background: var(--orange); }
.prism-spectrum span:nth-child(9) { background: var(--red); }

/* ---------- section scaffold ---------- */
.prism-section {
  padding: var(--section-y) 0;
  border-top: 1px solid var(--rule);
}
.prism-section--tight { padding-top: clamp(3rem, 6vw, 5rem); }

.prism-section__head { max-width: 54ch; margin-bottom: 3rem; }
.prism-section__head h2 {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-top: 0.6rem;
}
.prism-section__lede {
  margin-top: 1.25rem;
  color: var(--ink-dim);
  font-size: 0.95rem;
}

.prism-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
}

/* ---------- acronym ---------- */
.prism-section--acronym { padding: clamp(4rem, 7vw, 6rem) 0; }

.prism-acronym { max-width: 980px; }
.prism-acronym__h {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  letter-spacing: 0.02em;
  margin: 0.6rem 0 2rem;
  color: var(--ink);
}

.prism-acronym__letters {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
@media (max-width: 780px) {
  .prism-acronym__letters { grid-template-columns: repeat(5, 1fr); }
}
@media (max-width: 520px) {
  .prism-acronym__letters { grid-template-columns: 1fr; }
}
.prism-acronym__letters li {
  background: var(--void-2);
  padding: 1.6rem 1.2rem 1.4rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: background 0.2s;
}
.prism-acronym__letters li:hover { background: var(--void-3); }
.prism-acronym__letters li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: hsl(var(--hue) 85% 62%);
}
.prism-acronym__letters span {
  font-family: var(--serif);
  font-weight: 300;
  font-size: 2.4rem;
  line-height: 1;
  color: hsl(var(--hue) 85% 62%);
  letter-spacing: -0.02em;
}
.prism-acronym__letters strong {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--ink);
  font-weight: 500;
  text-transform: lowercase;
}
.prism-acronym__letters em {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
  font-style: normal;
}

.prism-acronym__expanded {
  margin-top: 2rem;
  max-width: var(--measure);
  color: var(--ink-dim);
  font-size: 0.96rem;
  line-height: 1.75;
}
.prism-acronym__expanded strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.5rem;
  background: linear-gradient(92deg, var(--violet), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- compare ---------- */
.prism-compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 820px) {
  .prism-compare { grid-template-columns: 1fr; }
  .prism-compare__arrow { display: none; }
}

.prism-compare__col {
  border: 1px solid var(--rule);
  padding: 2rem 1.75rem;
  background: var(--void-2);
  border-radius: 4px;
}
.prism-compare__col h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.15rem;
  margin-bottom: 1.25rem;
  color: var(--ink-mute);
}
.prism-compare__col--prism h3 {
  background: linear-gradient(92deg, var(--violet), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.prism-compare__col ul { list-style: none; display: grid; gap: 0.85rem; }
.prism-compare__col li {
  padding-left: 1rem;
  position: relative;
  color: var(--ink-dim);
  font-size: 0.88rem;
}
.prism-compare__col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 1px;
  background: var(--ink-mute);
}
.prism-compare__col--prism li::before { background: var(--cyan); }
.prism-compare__col li span {
  display: block;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.82rem;
  margin-bottom: 0.15rem;
}

.prism-compare__arrow {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--ink-mute);
  align-self: center;
}

/* ---------- dimensions grid ---------- */
.prism-dims {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
.prism-dims li {
  background: var(--void-2);
  padding: 1.5rem 1.4rem 1.7rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows: auto auto;
  column-gap: 1rem;
  row-gap: 0.4rem;
  position: relative;
  transition: background 0.2s;
}
.prism-dims li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: hsl(var(--hue) 85% 62%);
}
.prism-dims li:hover { background: var(--void-3); }
.prism-dims strong {
  grid-row: 1;
  font-family: var(--mono);
  color: hsl(var(--hue) 85% 62%);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}
.prism-dims__name {
  grid-row: 1;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
}
.prism-dims__w {
  grid-row: 1;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
}
.prism-dims__desc {
  grid-column: 2 / span 2;
  grid-row: 2;
  color: var(--ink-dim);
  font-size: 0.82rem;
}

/* ---------- loop diagram ---------- */
.prism-loop {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
}
@media (max-width: 980px) {
  .prism-loop { grid-template-columns: 1fr; }
}

.prism-loop__diagram {
  background: var(--void-2);
  border: 1px solid var(--rule);
  padding: 2rem 1.75rem 1.5rem;
  border-radius: 4px;
}
.prism-loop__diagram svg { width: 100%; height: auto; }
.prism-loop__diagram figcaption {
  margin-top: 1rem;
  color: var(--ink-mute);
  font-size: 0.78rem;
  font-style: italic;
}

.prism-loop__box { fill: var(--void-3); stroke: var(--rule); }
.prism-loop__box--accent { stroke: var(--cyan); }
.prism-loop__title {
  fill: var(--ink);
  font-family: "Fraunces", serif;
  font-size: 16px;
  font-weight: 500;
}
.prism-loop__sub {
  fill: var(--ink-mute);
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
}
.prism-loop__edge {
  stroke: url(#edge-g);
  stroke-width: 1.5;
  fill: none;
}
.prism-loop__edge--back {
  stroke-dasharray: 3 4;
  opacity: 0.75;
}

.prism-loop__steps {
  list-style: none;
  counter-reset: loopstep;
  display: grid;
  gap: 1.5rem;
}
.prism-loop__steps li {
  counter-increment: loopstep;
  padding-left: 2.8rem;
  position: relative;
}
.prism-loop__steps li::before {
  content: counter(loopstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.15rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
}
.prism-loop__steps strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}
.prism-loop__steps p { color: var(--ink-dim); font-size: 0.88rem; }

/* ---------- judges ---------- */
.prism-judges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.prism-judges__card {
  border: 1px solid var(--rule);
  background: var(--void-2);
  padding: 1.75rem 1.5rem;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}
.prism-judges__card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(92deg, var(--violet), var(--cyan), var(--yellow));
  opacity: 0.55;
}
.prism-judges__card header {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}
.prism-layer {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--cyan);
}
.prism-judges__card p {
  color: var(--ink-dim);
  font-size: 0.88rem;
}
.prism-judges__card p em { color: var(--yellow); font-style: italic; }

/* ---------- install ---------- */
.prism-section--cta .prism-install {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}
@media (max-width: 900px) { .prism-section--cta .prism-install { grid-template-columns: 1fr; } }

.prism-install__copy h2 {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3.2vw, 2.4rem);
  font-weight: 300;
  line-height: 1.15;
  margin: 0.6rem 0 1.25rem;
}
.prism-install__copy p { color: var(--ink-dim); max-width: var(--measure); }

.prism-install__bullets {
  list-style: none;
  margin-top: 1.5rem;
  display: grid;
  gap: 0.55rem;
}
.prism-install__bullets li {
  padding-left: 1.2rem;
  position: relative;
  color: var(--ink-dim);
  font-size: 0.88rem;
}
.prism-install__bullets li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-size: 0.7em;
  top: 0.55em;
}
.prism-install__bullets code {
  color: var(--yellow);
  background: var(--void-3);
  padding: 0.1rem 0.35rem;
  border-radius: 2px;
}

.prism-code {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.06), rgba(6, 182, 212, 0.04)),
    var(--void-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.75rem 1.5rem;
  color: var(--ink);
  white-space: pre-wrap;
  position: relative;
  overflow-x: auto;
}
.prism-code::before {
  content: "prism@fly ~ ";
  display: block;
  color: var(--ink-mute);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.prism-code .c { color: var(--ink-mute); }
.prism-code .p { color: var(--cyan); }

/* ---------- footer ---------- */
.prism-footer {
  margin-top: clamp(5rem, 8vw, 7rem);
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.5rem;
  align-items: center;
  color: var(--ink-mute);
  font-size: 0.78rem;
}
@media (max-width: 720px) {
  .prism-footer { grid-template-columns: 1fr; text-align: left; }
}
.prism-footer strong {
  display: block;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.16em;
  color: var(--ink);
  margin-bottom: 0.25rem;
}
.prism-footer__stack { text-align: center; letter-spacing: 0.05em; }
.prism-footer__stack strong { display: inline; color: var(--cyan); font-size: inherit; letter-spacing: 0.08em; }
.prism-footer__links {
  display: flex;
  gap: 1.5rem;
  justify-content: flex-end;
}
.prism-footer__links a { transition: color 0.2s; }
.prism-footer__links a:hover { color: var(--ink); }

/* ============================================================
   §06 · OpenSentience section — animated constellation + CTA
   ============================================================ */

.prism-section--os {
  padding-top: var(--section-y);
  padding-bottom: calc(var(--section-y) * 0.75);
  position: relative;
  /* Break out of .prism-page 1180px container so the background spans the full viewport. */
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding-left: calc(50vw - 50%);
  padding-right: calc(50vw - 50%);
  border-top: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
  background:
    linear-gradient(180deg, rgba(5, 6, 10, 0.0) 0%, rgba(139, 92, 246, 0.05) 50%, rgba(5, 6, 10, 0.0) 100%),
    var(--void-2);
}
.prism-section--os::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1400px 700px at 50% 20%, rgba(139, 92, 246, 0.18), transparent 65%),
    radial-gradient(1000px 600px at 85% 95%, rgba(6, 182, 212, 0.1), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.prism-os {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.prism-os__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  margin-top: 1.5rem;
}
.prism-os__h {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.5vw, 2.8rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 22ch;
}
.prism-os__h em {
  font-style: italic;
  background: linear-gradient(92deg, var(--violet), var(--cyan) 55%, var(--yellow));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.prism-os__lede {
  margin-top: 1.4rem;
  max-width: 54ch;
  font-size: 0.95rem;
  color: var(--ink-dim);
  line-height: 1.75;
}
.prism-os__lede strong { color: var(--ink); font-weight: 500; }
.prism-os__list {
  list-style: none;
  margin: 1.75rem 0 2rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-dim);
}
.prism-os__list li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  padding: 0.55rem 0;
  border-top: 1px solid var(--rule-soft);
}
.prism-os__list li:last-child { border-bottom: 1px solid var(--rule-soft); }
.prism-os__list li span {
  color: var(--violet);
  letter-spacing: 0.06em;
  font-weight: 600;
}
.prism-os__list li strong {
  color: var(--ink);
  font-weight: 500;
}

/* ---------- CTA button ---------- */
.prism-os__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.6rem;
  background:
    linear-gradient(92deg, rgba(139, 92, 246, 0.18), rgba(6, 182, 212, 0.12) 60%, rgba(250, 204, 21, 0.15));
  border: 1px solid rgba(139, 92, 246, 0.45);
  border-radius: 999px;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  box-shadow:
    0 0 0 0 rgba(139, 92, 246, 0.0),
    inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}
.prism-os__cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(92deg,
    transparent 0%,
    rgba(255, 255, 255, 0.08) 45%,
    transparent 90%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}
.prism-os__cta:hover {
  transform: translateY(-2px);
  border-color: rgba(6, 182, 212, 0.75);
  box-shadow:
    0 12px 40px -18px rgba(139, 92, 246, 0.6),
    0 0 0 4px rgba(139, 92, 246, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}
.prism-os__cta:hover::before { transform: translateX(100%); }
.prism-os__cta-label { position: relative; z-index: 1; }
.prism-os__cta-arrow {
  position: relative;
  z-index: 1;
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}
.prism-os__cta:hover .prism-os__cta-arrow { transform: translateX(4px); }

.prism-os__fineprint {
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}

/* ---------- animated visual ---------- */
.prism-os__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}
.prism-os__orbit {
  position: relative;
  width: min(420px, 88vw);
  aspect-ratio: 1 / 1;
}
.prism-os__links {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform-origin: 50% 50%;
  animation: prism-os-rotate 60s linear infinite;
}
.prism-os__links-inner line {
  stroke-dasharray: 4 8;
  stroke-linecap: round;
  opacity: 0.6;
  animation: prism-os-dash 6s linear infinite;
}
@keyframes prism-os-rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes prism-os-dash {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -48; }
}
.prism-os__core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 110px;
  height: 110px;
  transform: translate(-50%, -50%);
}
.prism-os__core-ring,
.prism-os__core-ring--2 {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(139, 92, 246, 0.55);
  animation: prism-os-breath 5s ease-in-out infinite;
}
.prism-os__core-ring--2 {
  border-color: rgba(6, 182, 212, 0.45);
  animation-delay: 2.5s;
}
@keyframes prism-os-breath {
  0%   { transform: scale(0.7); opacity: 0.0; }
  35%  { opacity: 0.9; }
  100% { transform: scale(1.8); opacity: 0.0; }
}
.prism-os__core-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 26px;
  height: 26px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background:
    radial-gradient(circle at 40% 35%, #ffffff 0%, #a78bfa 40%, #312e81 100%);
  box-shadow:
    0 0 40px 4px rgba(139, 92, 246, 0.6),
    0 0 80px 12px rgba(6, 182, 212, 0.3);
  animation: prism-os-pulse 3.2s ease-in-out infinite;
}
@keyframes prism-os-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50%      { transform: translate(-50%, -50%) scale(1.12); }
}

.prism-os__nodes {
  position: absolute;
  inset: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  animation: prism-os-rotate 60s linear infinite;
}
.prism-os__nodes li {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  transform: rotate(calc(var(--i) * 40deg)) translate(calc(min(420px, 88vw) * 0.44)) rotate(calc(var(--i) * -40deg));
}
.prism-os__nodes li span {
  position: absolute;
  top: -14px;
  left: -26px;
  width: 52px;
  height: 28px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: rgba(5, 6, 10, 0.9);
  border: 1px solid hsl(var(--hue) 70% 55% / 0.6);
  border-radius: 4px;
  box-shadow: 0 0 16px hsl(var(--hue) 70% 55% / 0.35);
  animation:
    prism-os-counter 60s linear infinite,
    prism-os-node-glow 4s ease-in-out infinite;
  animation-delay: 0s, calc(var(--i) * 0.45s);
}
@keyframes prism-os-counter {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}
@keyframes prism-os-node-glow {
  0%, 100% {
    box-shadow: 0 0 12px hsl(var(--hue) 70% 55% / 0.25);
    border-color: hsl(var(--hue) 70% 55% / 0.45);
  }
  50% {
    box-shadow: 0 0 22px hsl(var(--hue) 85% 65% / 0.7);
    border-color: hsl(var(--hue) 85% 65% / 0.9);
  }
}

.prism-os__caption {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (prefers-reduced-motion: reduce) {
  .prism-os__links-inner,
  .prism-os__nodes,
  .prism-os__core-ring,
  .prism-os__core-ring--2,
  .prism-os__core-dot,
  .prism-os__links-inner line { animation: none !important; }
}

@media (max-width: 900px) {
  .prism-os__grid { grid-template-columns: 1fr; }
  .prism-os__visual { order: 2; }
}

/* ---------- responsive topbar ---------- */
@media (max-width: 760px) {
  .prism-topbar { flex-wrap: wrap; gap: 1rem; }
  .prism-nav { order: 3; width: 100%; justify-content: flex-start; flex-wrap: wrap; gap: 1rem; margin-left: 0; }
  .prism-topbar__meta { margin-left: auto; }
}