@import url("fonts.css");

/* ============================================================
   SYNAPSE COLLECTIVE — measurement record
   A document, not a blog. Every page is an issued certificate:
   header band, metadata grid, result, traceability footer.
   ============================================================ */

:root {
  --ground:      #8d9a95;
  --ground-deep: #77847f;
  --paper:       #f3f4f1;
  --paper-edge:  #e4e6e1;
  --ink:         #14181a;
  --ink-soft:    #4b5457;
  --ink-faint:   #6d7679;
  --rule:        #14181a2e;
  --rule-hair:   #14181a1a;
  --signal:      #a8440c;
  --signal-bg:   #f0d9c8;
  --pass:        #3f6350;
  --pass-bg:     #dce5dd;
  --void:        #6d7679;

  --measure: 70ch;
  --band: 1040px;
  --step: clamp(1.1rem, 2.2vw, 1.9rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground:      #0d1011;
    --ground-deep: #070909;
    --paper:       #1c2224;
    --paper-edge:  #2a3134;
    --ink:         #e7eae8;
    --ink-soft:    #a2adb0;
    --ink-faint:   #7d8a8d;
    --rule:        #e7eae836;
    --rule-hair:   #e7eae820;
    --signal:      #e2803f;
    --signal-bg:   #3a2415;
    --pass:        #8fb99c;
    --pass-bg:     #1d2b22;
    --void:        #7d8a8d;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 clamp(1rem, 0.96rem + 0.2vw, 1.075rem)/1.62 "Archivo", system-ui, sans-serif;
  font-feature-settings: "kern" 1;
  -webkit-font-smoothing: antialiased;
}

/* ---------- the sheet ---------------------------------------------------- */

.sheet {
  max-width: var(--band);
  margin: clamp(0px, 3vw, 34px) auto;
  background: var(--paper);
  border: 1px solid var(--rule);
  outline: 1px solid var(--rule-hair);
  outline-offset: 4px;
}

.sheet + .sheet { margin-top: clamp(20px, 3vw, 34px); }

.pad { padding: clamp(20px, 3.4vw, 44px); }

/* ---------- issuer band -------------------------------------------------- */

.issuer {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.7rem clamp(20px, 3.4vw, 44px);
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.mark {
  margin: 0;
  font: 700 0.95rem/1 "Archivo Narrow", "Archivo", sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}
.mark span { color: var(--signal); }

.issuer nav {
  display: flex;
  gap: 1.4rem;
  font: 400 0.76rem/1 "Spline Sans Mono", ui-monospace, monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.issuer nav a { color: var(--ink-soft); text-decoration: none; padding-bottom: 2px; border-bottom: 1px solid transparent; }
.issuer nav a:hover, .issuer nav a[aria-current] { color: var(--ink); border-bottom-color: var(--signal); }

/* ---------- metadata grid ------------------------------------------------ */

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  border-bottom: 1px solid var(--rule);
}

.meta > div {
  padding: 0.6rem clamp(20px, 3.4vw, 44px);
  border-right: 1px solid var(--rule-hair);
  font: 400 0.78rem/1.5 "Spline Sans Mono", ui-monospace, monospace;
}
.meta > div:last-child { border-right: 0; }
.meta dt, .meta .k {
  margin: 0;
  color: var(--ink-faint);
  font-size: 0.66rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.meta dd, .meta .v { margin: 0.15rem 0 0; color: var(--ink); font-variant-numeric: tabular-nums; }

/* ---------- headline ----------------------------------------------------- */

h1.result {
  margin: 0.2em 0 0;
  font: 700 clamp(2.15rem, 6.6vw, 4.6rem)/0.94 "Archivo Narrow", "Archivo", sans-serif;
  letter-spacing: -0.015em;
  text-transform: uppercase;
  text-wrap: balance;
}

.standfirst {
  margin: 1.1rem 0 0;
  max-width: var(--measure);
  color: var(--ink-soft);
  font-size: 1.06em;
}

/* ---------- status chip -------------------------------------------------- */

.chip {
  display: inline-block;
  padding: 0.22em 0.6em;
  border: 1px solid currentColor;
  font: 600 0.68rem/1.45 "Spline Sans Mono", ui-monospace, monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}
.chip--out  { color: var(--signal); background: var(--signal-bg); }
.chip--in   { color: var(--pass);   background: var(--pass-bg); }

/* ---------- tolerance band (the signature) ------------------------------- */

/* ponytail: an SVG scales its whole viewBox, so at 390px the 11px labels render
   at ~4px and the signature graphic dies on the device most readers use. Floor the
   drawing width and let it scroll instead of shrinking the type. */
.band { margin: clamp(1.8rem, 4vw, 3rem) 0 0; overflow-x: auto; }
.band svg { min-width: 540px; }
.band figcaption {
  font: 400 0.72rem/1.5 "Spline Sans Mono", ui-monospace, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.9rem;
}
.band svg { display: block; width: 100%; height: auto; overflow: visible; }

.band .axis   { stroke: var(--ink); stroke-width: 1; }
.band .tick   { stroke: var(--ink); stroke-width: 1; opacity: 0.45; }
.band .expect { fill: var(--ink); opacity: 0.09; }
@media (prefers-color-scheme: dark) { .band .expect { opacity: 0.16; } }
.band .num    { fill: var(--ink-faint); font: 400 9px "Spline Sans Mono", monospace; }
.band .stem   { stroke: var(--ink-soft); stroke-width: 1.5; }
.band .stem--hit { stroke: var(--signal); stroke-width: 2.5; }
.band .lab    { fill: var(--ink); font: 600 11px "Spline Sans Mono", monospace; }
.band .lab--hit { fill: var(--signal); }
.band .sub    { fill: var(--ink-faint); font: 400 9px "Spline Sans Mono", monospace; }

/* one authored moment: markers rise into place, already-visible default */
@media (prefers-reduced-motion: no-preference) {
  .band .marker { animation: settle 620ms cubic-bezier(.16,.84,.31,1) backwards; }
  .band .marker:nth-of-type(2) { animation-delay: 90ms; }
  .band .marker:nth-of-type(3) { animation-delay: 180ms; }
  @keyframes settle { from { transform: translateY(9px); opacity: 0; } }
}

/* ---------- body copy ---------------------------------------------------- */

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  margin-top: 2.4em;
  margin-bottom: 0.5em;
  font: 700 1.28rem/1.2 "Archivo Narrow", sans-serif;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.prose h2 + * { margin-top: 0; }
.prose a { color: var(--ink); text-decoration-color: var(--signal); text-underline-offset: 3px; }
.prose code, .mono { font: 400 0.88em/1.5 "Spline Sans Mono", ui-monospace, monospace; }
.prose strong { font-weight: 600; }
.prose blockquote {
  margin: 1.4em 0;
  padding-left: 1.1em;
  border-left: 1px solid var(--rule);
  color: var(--ink-soft);
}

.figures {
  width: 100%;
  margin: 1.6em 0;
  border-collapse: collapse;
  font: 400 0.86rem/1.5 "Spline Sans Mono", ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
}
.figures th, .figures td { padding: 0.5rem 0.7rem; border-bottom: 1px solid var(--rule-hair); text-align: right; }
.figures th:first-child, .figures td:first-child { text-align: left; }
.figures thead th { border-bottom: 1px solid var(--rule); font-weight: 600; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); }

/* ---------- register ----------------------------------------------------- */

.register-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem clamp(20px, 3.4vw, 44px);
  border-bottom: 1px solid var(--rule);
}
.register-head h2 {
  margin: 0;
  font: 700 0.9rem/1 "Archivo Narrow", sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.register-head p { margin: 0; font: 400 0.72rem/1 "Spline Sans Mono", monospace; color: var(--ink-faint); }

.register { width: 100%; border-collapse: collapse; }

.register th, .register td {
  padding: 0.85rem clamp(10px, 1.4vw, 18px);
  border-bottom: 1px solid var(--rule-hair);
  font: 400 0.8rem/1.45 "Spline Sans Mono", ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
  text-align: left;
  vertical-align: baseline;
}
.register th {
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule);
}
.register td:first-child, .register th:first-child { padding-left: clamp(20px, 3.4vw, 44px); }
.register td:last-child,  .register th:last-child  { padding-right: clamp(20px, 3.4vw, 44px); text-align: right; }
.register tbody tr:last-child td { border-bottom: 0; }
.register tbody tr:hover { background: var(--paper-edge); }
.register .subject { font-family: "Archivo", sans-serif; font-size: 0.94rem; }
.register .subject a { color: var(--ink); text-decoration-color: var(--rule); text-underline-offset: 3px; }
.register .subject a:hover { text-decoration-color: var(--signal); }
.register .val { color: var(--ink); }

/* ---------- traceability footer ------------------------------------------ */

.trace {
  border-top: 1px solid var(--rule);
  padding: 1rem clamp(20px, 3.4vw, 44px) 1.2rem;
  font: 400 0.74rem/1.75 "Spline Sans Mono", ui-monospace, monospace;
  color: var(--ink-faint);
}
.trace dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.15rem 1.2rem; margin: 0; }
.trace dt { color: var(--ink-faint); letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.68rem; }
.trace dd { margin: 0; color: var(--ink-soft); overflow-wrap: anywhere; }

.colophon {
  max-width: var(--band);
  margin: 0 auto clamp(24px, 4vw, 46px);
  padding: 0 clamp(4px, 1vw, 10px);
  font: 400 0.74rem/1.8 "Spline Sans Mono", ui-monospace, monospace;
  color: #14181a99;
}
@media (prefers-color-scheme: dark) { .colophon { color: #e7eae899; } }
.colophon a { color: inherit; }

/* ---------- a11y --------------------------------------------------------- */

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 50%;
  top: 8px;
  transform: translateX(-50%);
  z-index: 9;
  background: var(--paper);
  color: var(--ink);
  padding: 0.6rem 1rem;
  border: 1px solid var(--ink);
  font: 600 0.8rem "Spline Sans Mono", monospace;
}

@media (max-width: 620px) {
  .register th:nth-child(2), .register td:nth-child(2),
  .register th:nth-child(4), .register td:nth-child(4) { display: none; }
  .meta > div { border-right: 0; border-bottom: 1px solid var(--rule-hair); }
}