/* ============================================================
   Stellar Labs — utility page shell
   terms.html / privacy.html / cookies.html / 404.html
   PARALLAX × SYSTEM. The :root token values mirror css/site.css;
   if the homepage tokens change, update these to match.
   ============================================================ */

:root {
  --px-paper: #f3efe5;
  --px-paper-soft: #f6f3ec;
  --px-paper-muted: #e9e6de;
  --px-carbon: #11110f;
  --px-carbon-soft: #1a1916;
  --px-carbon-muted: #6d6961;
  --px-carbon-faint: #817a70;
  --px-ember: #e14b2a;
  --px-ember-text: #a6371f;

  --surface-page: var(--px-paper);
  --surface-panel: var(--px-paper-soft);
  --surface-band: var(--px-paper-muted);
  --surface-inverse: var(--px-carbon);
  --text-primary: var(--px-carbon);
  --text-secondary: var(--px-carbon-muted);
  --text-inverse: var(--px-paper);
  --rule: rgba(17, 17, 15, 0.16);
  --rule-inverse: rgba(243, 239, 229, 0.16);
  --signal-change: var(--px-ember);
  --signal-text: var(--px-ember-text);

  --font-identity: "DM Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  --font-information: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-editorial: "Newsreader", Georgia, "Times New Roman", serif;

  --layout-max: 88rem;
  --doc-max: 46rem;
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --header-height: 4.5rem;

  --motion-fast: 160ms;
}

/* Base */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  background: var(--px-carbon);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--surface-page);
  color: var(--text-primary);
  font-family: var(--font-information);
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.1rem);
  line-height: 1.55;
  letter-spacing: -0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitchTiles'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.75'/%3E%3C/svg%3E");
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

::selection {
  background: var(--signal-change);
  color: var(--px-paper);
}

:focus-visible {
  outline: 2px solid var(--signal-change);
  outline-offset: 4px;
}

.skip {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1000;
  transform: translateY(-160%);
  padding: 0.7rem 1rem;
  background: var(--px-paper);
  color: var(--px-carbon);
  font: 500 0.75rem/1 var(--font-information);
  transition: transform var(--motion-fast) ease;
}

.skip:focus {
  transform: translateY(0);
}

.section-id {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font: 500 0.68rem/1.25 var(--font-identity);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.status-dot {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--signal-change);
  flex: 0 0 auto;
}

/* Header */

.page-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: color-mix(in srgb, var(--px-carbon) 91%, transparent);
  border-bottom: 1px solid var(--rule-inverse);
  color: var(--text-inverse);
  backdrop-filter: blur(18px) saturate(120%);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
}

.page-header__inner {
  width: min(100%, var(--layout-max));
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
}

.brand__mark {
  width: 2rem;
  height: 2rem;
  flex: 0 0 auto;
}

.brand__name {
  font: 500 0.88rem/1 var(--font-identity);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand__descriptor {
  padding-left: 0.8rem;
  border-left: 1px solid var(--rule-inverse);
  color: #8f897f;
  font: 500 0.58rem/1.2 var(--font-information);
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.page-header__back {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.45rem;
  padding: 0 0.9rem;
  border: 1px solid var(--rule-inverse);
  border-radius: 99rem;
  font: 500 0.72rem/1 var(--font-information);
  white-space: nowrap;
  transition:
    background var(--motion-fast) ease,
    border-color var(--motion-fast) ease,
    color var(--motion-fast) ease;
}

.page-header__back:hover {
  background: var(--px-paper);
  border-color: var(--px-paper);
  color: var(--px-carbon);
}

/* Document column */

.page-main {
  flex: 1 0 auto;
  width: 100%;
}

.page-doc {
  max-width: calc(var(--doc-max) + 2 * var(--gutter));
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5.5rem) var(--gutter) clamp(4rem, 8vw, 6.5rem);
}

.page-doc__head {
  padding-bottom: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: clamp(1.75rem, 3.5vw, 2.75rem);
  border-bottom: 1px solid var(--rule);
}

.page-doc__head h1 {
  margin: 1rem 0 0;
  font: 400 clamp(2.1rem, 5.5vw, 3.2rem)/1.12 var(--font-editorial);
  letter-spacing: -0.03em;
}

.page-doc__body h2 {
  margin: 2.6rem 0 1rem;
  font: 600 1.3rem/1.3 var(--font-information);
  letter-spacing: -0.02em;
}

.page-doc__body h3 {
  margin: 2.1rem 0 0.8rem;
  font: 600 1.05rem/1.35 var(--font-information);
  letter-spacing: -0.015em;
}

.page-doc__body p {
  margin: 0 0 1.2rem;
}

.page-doc__body strong {
  font-weight: 600;
}

.page-doc__body ol,
.page-doc__body ul {
  margin: 0 0 1.2rem;
  padding-left: 1.5rem;
}

.page-doc__body li {
  margin-bottom: 0.45rem;
}

.page-doc__body li::marker {
  color: var(--text-secondary);
}

.page-doc__body a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--rule);
  transition: color var(--motion-fast) ease, text-decoration-color var(--motion-fast) ease;
}

.page-doc__body a:hover {
  color: var(--signal-text);
  text-decoration-color: var(--signal-change);
}

.page-doc__body blockquote {
  margin: 1.8rem 0;
  padding: 0.35rem 0 0.35rem 1.4rem;
  border-left: 2px solid var(--px-carbon);
  font-family: var(--font-editorial);
  font-size: 1.1em;
  line-height: 1.5;
}

.page-doc__body blockquote p:last-child {
  margin-bottom: 0;
}

.page-doc__body code {
  padding: 0.1em 0.4em;
  background: var(--surface-band);
  font: 400 0.85em/1.4 var(--font-identity);
  overflow-wrap: break-word;
}

/* Footer */

.page-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
  padding: 2rem var(--gutter);
  border-top: 1px solid var(--rule-inverse);
  background: var(--px-carbon);
  color: var(--px-paper);
}

.page-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

.page-footer__brand img {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
}

.page-footer__brand div {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-footer__brand strong {
  font: 500 0.88rem/1 var(--font-identity);
  letter-spacing: 0.02em;
}

.page-footer__brand span {
  color: #817b72;
  font: 500 0.58rem/1 var(--font-information);
  letter-spacing: 0.12em;
}

.page-footer__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem 1.2rem;
  color: #aaa49b;
  font-size: 0.72rem;
}

.page-footer__links a {
  transition: color var(--motion-fast) ease;
}

.page-footer__links a:hover {
  color: var(--px-paper);
}

.page-footer__links a[aria-current="page"] {
  color: var(--signal-change);
}

/* 404 — carbon field */

body.void {
  background: var(--px-carbon);
  color: var(--text-inverse);
}

.void__main {
  flex: 1 0 auto;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: clamp(2rem, 6vw, 4rem) var(--gutter) 1.75rem;
  text-align: center;
}

.void__stack {
  margin: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.3rem;
}

.void__stack .section-id {
  color: #8f897f;
  letter-spacing: 0.14em;
}

.void__mark {
  width: clamp(4rem, 11vw, 5.5rem);
  height: auto;
  margin: 0.6rem 0;
}

.void__stack h1 {
  margin: 0;
  max-width: 16ch;
  font: 400 clamp(2rem, 6.5vw, 3.3rem)/1.12 var(--font-editorial);
  letter-spacing: -0.03em;
}

.void__note {
  margin: 0;
  max-width: 32rem;
  color: #9c968d;
  font-size: 0.95rem;
}

.void__home {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.75rem;
  margin-top: 0.6rem;
  padding: 0 1.3rem;
  border: 1px solid var(--rule-inverse);
  border-radius: 99rem;
  font: 500 0.78rem/1 var(--font-information);
  letter-spacing: 0.02em;
  transition:
    background var(--motion-fast) ease,
    border-color var(--motion-fast) ease,
    color var(--motion-fast) ease;
}

.void__home:hover {
  background: var(--px-paper);
  border-color: var(--px-paper);
  color: var(--px-carbon);
}

.void__foot {
  margin: 3rem 0 0;
  color: #625e57;
  font: 400 0.6rem/1.4 var(--font-identity);
  letter-spacing: 0.12em;
}

/* Responsive */

@media (max-width: 47.5rem) {
  :root {
    --header-height: 4.25rem;
  }

  .page-header__inner {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .brand__descriptor {
    display: none;
  }

  .brand__mark {
    width: 1.8rem;
    height: 1.8rem;
  }

  .page-footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem 1.25rem;
  }
}

/* Reduced motion — no animations anywhere; kill remaining transitions too. */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}