/* IRE documentation — warm ash/ember palette, editorial-technical direction. */

:root {
  --ink:      #100e0b;
  --ink-lift: #16130f;
  --surface:  #1b1712;
  --paper:    #ece4d6;
  --muted:    #988f80;
  --faint:    #6d6559;
  --ember:    #c4622d;
  --ember-lo: #8f4620;
  --rule:     rgba(236, 228, 214, 0.11);
  --rule-lo:  rgba(236, 228, 214, 0.055);

  --serif: "Instrument Serif", Georgia, serif;
  --sans:  "IBM Plex Sans", ui-sans-serif, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, monospace;

  --rail: 15rem;
  --toc: 13rem;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 5rem; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(120% 80% at 8% -10%, rgba(196, 98, 45, 0.13), transparent 62%),
    radial-gradient(90% 60% at 100% 0%, rgba(196, 98, 45, 0.05), transparent 58%),
    var(--ink);
  color: var(--paper);
  font: 400 1rem/1.75 var(--sans);
  letter-spacing: 0.002em;
}

/* Fixed, non-interactive film grain — never on a scrolling container. */
.grain {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--ember-lo); color: #fff; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 70;
  padding: 0.7rem 1.1rem;
  background: var(--ember);
  color: #fff;
  font: 500 0.8rem var(--mono);
  text-decoration: none;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

.micro {
  margin: 0;
  font: 500 0.68rem/1.6 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------- pre-mainnet advisory strip ---------- */

.advisory {
  position: relative;
  z-index: 40;
  margin: 0;
  padding: 0.6rem 1.5rem;
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(90deg, rgba(196, 98, 45, 0.16), rgba(196, 98, 45, 0.02));
  font: 400 0.72rem/1.5 var(--mono);
  letter-spacing: 0.05em;
  color: #dcc6b3;
}
.advisory code { color: var(--paper); font-size: 1em; background: none; padding: 0; border: 0; }

/* ---------- frame ---------- */

.frame {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr) var(--toc);
  gap: 0 clamp(2rem, 5vw, 5.5rem);
  max-width: 96rem;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3.5rem);
}

/* ---------- left rail ---------- */

.rail {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 2.6rem 1.4rem 2.2rem 0;
  border-right: 1px solid var(--rule);
}

.mark {
  font: 400 1.6rem/1 var(--serif);
  letter-spacing: 0.06em;
  text-decoration: none;
}
.mark span {
  display: block;
  margin-top: 0.45rem;
  font: 500 0.62rem var(--mono);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ember);
}

.rail ul {
  margin: 2.8rem 0 0;
  padding: 0;
  list-style: none;
}
.rail li + li { margin-top: 0.15rem; }

.rail a:not(.mark) {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.5rem 0.7rem 0.5rem 0;
  border-left: 2px solid transparent;
  padding-left: 0.9rem;
  margin-left: -0.9rem;
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.rail a:not(.mark):hover {
  color: var(--paper);
  border-left-color: var(--ember-lo);
  transform: translateX(3px);
}
.rail a[aria-current="page"] {
  color: var(--paper);
  border-left-color: var(--ember);
}
.rail .idx {
  font: 500 0.64rem var(--mono);
  letter-spacing: 0.1em;
  color: var(--faint);
}
.rail a[aria-current="page"] .idx { color: var(--ember); }

.rail-foot { margin-top: auto; line-height: 1.9; }

.rail ul.rail-product { margin-top: 2.2rem; }
.rail ul.rail-protocol { margin-top: 0.35rem; }
.rail-group {
  margin: 1.85rem 0 0.45rem;
  padding-left: 0.9rem;
  margin-left: -0.9rem;
  color: var(--faint);
  opacity: 0.9;
}
.rail ul.rail-product a:not(.mark) {
  font-size: 1.02rem;
  color: #b7aea0;
}
.rail ul.rail-protocol a:not(.mark) {
  font-size: 0.86rem;
  color: var(--faint);
  padding-top: 0.38rem;
  padding-bottom: 0.38rem;
}
.rail ul.rail-protocol a:not(.mark):hover,
.rail ul.rail-product a:not(.mark):hover,
.rail ul.rail-protocol a[aria-current="page"],
.rail ul.rail-product a[aria-current="page"] {
  color: var(--paper);
}


/* ---------- main ---------- */

main {
  min-width: 0;
  padding: clamp(3rem, 7vw, 6rem) 0 5rem;
}

/* home hero: left-aligned, asymmetric, spec sheet under the lead */
.hero { max-width: 46rem; }
.hero h1 {
  margin: 1.5rem 0 0;
  font: 400 clamp(3rem, 9.5vw, 6.5rem)/0.94 var(--serif);
  letter-spacing: -0.028em;
}
.hero h1 em {
  display: block;
  font-style: italic;
  color: var(--ember);
}

.page-head { max-width: 44rem; }
.page-head h1 {
  margin: 1.1rem 0 0;
  font: 400 clamp(2.4rem, 6vw, 3.9rem)/1.02 var(--serif);
  letter-spacing: -0.022em;
}

.lead {
  margin: 1.6rem 0 0;
  max-width: 40rem;
  font-size: 1.16rem;
  line-height: 1.68;
  color: #cdc4b4;
}
.lead code { font-size: 0.94em; }

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1px;
  margin: 3.2rem 0 0;
  border: 1px solid var(--rule);
  background: var(--rule-lo);
}
.facts > div {
  padding: 1rem 1.15rem 1.1rem;
  background: var(--ink-lift);
}
.facts dt {
  font: 500 0.62rem var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}
.facts dd {
  margin: 0.5rem 0 0;
  font: 400 0.94rem/1.4 var(--mono);
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---------- prose ---------- */

.prose {
  counter-reset: sect;
  max-width: 44rem;
  margin-top: clamp(3.5rem, 7vw, 5.5rem);
}

.prose > * + * { margin-top: 1.15rem; }

.prose h2 {
  position: relative;
  margin: 3.8rem 0 1.4rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--rule);
  font: 400 1.95rem/1.2 var(--serif);
  letter-spacing: -0.012em;
}
.prose h2::before {
  counter-increment: sect;
  content: counter(sect, decimal-leading-zero);
  position: absolute;
  top: 1.85rem;
  left: -3.6rem;
  font: 500 0.68rem var(--mono);
  letter-spacing: 0.1em;
  color: var(--ember);
}

.prose h3 {
  margin: 2.4rem 0 0.9rem;
  font: 600 0.78rem var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #cdc4b4;
}

.anchor { text-decoration: none; }
.anchor:hover { color: var(--ember); }

.prose p, .prose li { color: #d3cabb; }
.prose strong { color: var(--paper); font-weight: 600; }
.prose em { font-style: italic; }

.prose a:not(.anchor) {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: var(--ember);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.18s ease;
}
.prose a:not(.anchor):hover { color: var(--ember); }

.prose ul, .prose ol { margin: 1.15rem 0; padding-left: 1.2rem; }
.prose li + li { margin-top: 0.5rem; }
.prose ul { list-style: none; padding-left: 0; }
.prose ul > li { position: relative; padding-left: 1.35rem; }
.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0.1rem;
  top: 0.72em;
  width: 0.42rem;
  height: 1px;
  background: var(--ember);
}

:not(pre) > code {
  padding: 0.12em 0.38em;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--surface);
  font: 400 0.86em var(--mono);
  color: #e4b998;
  overflow-wrap: anywhere;
}

/* ---------- code blocks ---------- */

.snippet {
  position: relative;
  margin: 1.7rem 0;
  border: 1px solid var(--rule);
  border-left: 2px solid var(--ember-lo);
  background: var(--ink-lift);
}
.snippet pre {
  margin: 0;
  padding: 1.15rem 1.25rem;
  overflow-x: auto;
  font: 400 0.855rem/1.7 var(--mono);
  color: #ddd3c4;
}
.snippet pre code { font: inherit; color: inherit; background: none; border: 0; padding: 0; }

.copy {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--surface);
  color: var(--muted);
  font: 500 0.63rem var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.snippet:hover .copy, .copy:focus-visible { opacity: 1; }
.copy:hover { color: var(--paper); border-color: var(--ember-lo); }
.copy[data-state="done"] { opacity: 1; color: var(--ember); border-color: var(--ember-lo); }
.copy[data-state="fail"] { opacity: 1; color: #d98d6a; }

/* ---------- tables ---------- */

.scroller {
  margin: 2rem 0;
  overflow-x: auto;
  border: 1px solid var(--rule);
}
.prose table {
  width: 100%;
  min-width: 34rem;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.prose thead th {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--rule);
  background: var(--surface);
  text-align: left;
  font: 500 0.63rem var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.prose tbody td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--rule-lo);
  vertical-align: top;
  color: #cdc4b4;
  line-height: 1.6;
}
.prose tbody tr:last-child td { border-bottom: 0; }
.prose tbody tr:nth-child(odd) td { background: rgba(236, 228, 214, 0.014); }
.prose tbody td:first-child { color: var(--paper); font-weight: 500; }
/* percentages and denominations read as figures, not prose */
.prose tbody td:nth-child(2) { font-family: var(--mono); font-size: 0.85rem; white-space: nowrap; }

/* ---------- right rail (on this page) ---------- */

.toc {
  position: sticky;
  top: 3rem;
  align-self: start;
  padding: clamp(3rem, 7vw, 6rem) 0 2rem;
}
.toc ol {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--rule);
}
.toc li { margin: 0; }
.toc a {
  display: block;
  padding: 0.42rem 0 0.42rem 0.85rem;
  margin-left: -1px;
  border-left: 1px solid transparent;
  font-size: 0.83rem;
  line-height: 1.45;
  text-decoration: none;
  color: var(--faint);
  transition: color 0.18s ease, border-color 0.18s ease;
}
.toc a:hover { color: var(--paper); border-left-color: var(--ember); }

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

.foot {
  margin-top: 5.5rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 0.5rem;
}

/* ---------- entrance ---------- */

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.reveal { animation: rise 0.72s cubic-bezier(0.22, 0.68, 0.24, 1) both; }
.hero .reveal:nth-child(1) { animation-delay: 0.04s; }
.hero .reveal:nth-child(2) { animation-delay: 0.12s; }
.hero .reveal:nth-child(3) { animation-delay: 0.2s; }
.hero .reveal:nth-child(4) { animation-delay: 0.28s; }
main > .prose.reveal { animation-delay: 0.22s; }

/* ---------- responsive ---------- */

@media (max-width: 1180px) {
  :root { --toc: 0rem; }
  .frame { grid-template-columns: var(--rail) minmax(0, 1fr); }
  .toc { display: none; }
}

@media (max-width: 860px) {
  .frame { grid-template-columns: minmax(0, 1fr); padding: 0 1.25rem; }

  .rail {
    position: static;
    height: auto;
    flex-direction: column;
    padding: 2rem 0 1.4rem;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }
  .rail ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.4rem;
    margin-top: 1.6rem;
  }
  .rail ul.rail-protocol { margin-top: 0.35rem; }
  .rail-group {
    flex-basis: 100%;
    margin: 0.85rem 0 0.15rem;
    padding-left: 0;
    margin-left: 0;
  }
  .rail li + li { margin-top: 0; }
  .rail a:not(.mark) { padding: 0.3rem 0; border-left: 0; margin-left: 0; padding-left: 0; }
  .rail a:not(.mark):hover { transform: none; }
  .rail a[aria-current="page"] { border-left: 0; box-shadow: inset 0 -1px 0 var(--ember); }
  .rail-foot { display: none; }

  main { padding: 3rem 0 4rem; }
  .prose h2 { margin-top: 3rem; }
  .prose h2::before { position: static; display: block; margin-bottom: 0.55rem; }
  .copy { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { animation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
  .rail a:not(.mark):hover { transform: none; }
}

.foot a {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: var(--ember);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.foot a:hover { color: var(--ember); }
.foot code {
  font-size: 1em;
  letter-spacing: 0.08em;
  text-transform: none;
}