*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #0a0b0d;
  --ink-2: #12141a;
  --ink-3: #1a1d26;
  --rule: rgba(236, 234, 228, 0.12);
  --rule-strong: rgba(236, 234, 228, 0.22);
  --paper: #eceae4;
  --paper-dim: #c9c6bc;
  --paper-mute: #8f8c84;
  --signal: #ff5a2f;
  --signal-soft: rgba(255, 90, 47, 0.14);
  --proof: #b8e86a;
  --proof-ink: #1a2a0a;
  --steel: #8eb4c9;
  --display: "Space Grotesk", system-ui, sans-serif;
  --serif: "Newsreader", "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 1180px;
  --prose: 680px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--display);
  background: var(--ink);
  color: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
::selection { background: var(--signal); color: #fff; }

.atmosphere {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(90% 55% at 70% 0%, rgba(255, 90, 47, 0.09), transparent 55%),
    radial-gradient(70% 50% at 10% 100%, rgba(142, 180, 201, 0.07), transparent 50%),
    linear-gradient(180deg, #0a0b0d 0%, #0d0f14 45%, #0a0b0d 100%);
}
.atmosphere::after {
  content: "";
  position: absolute; inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}
.grid-floor {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(236,234,228,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(236,234,228,0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.55), transparent 70%);
}

.wrap { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
.wrap-narrow { width: min(100% - 2.5rem, var(--prose)); margin-inline: auto; }

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  height: 4.25rem;
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  border-bottom: 1px solid var(--rule);
  background: rgba(10, 11, 13, 0.84);
  backdrop-filter: blur(12px);
}
.topbar.scrolled { border-bottom-color: var(--rule); }
.brand {
  font-size: 1.15rem; font-weight: 700; letter-spacing: -0.03em;
  display: inline-flex; align-items: baseline; gap: 0.4rem;
}
.brand em { font-style: normal; color: var(--signal); font-weight: 600; }
.top-links { display: flex; gap: 1.25rem; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.top-links a {
  font-size: 0.82rem; color: var(--paper-mute); font-weight: 500;
  transition: color 0.2s;
}
.top-links a:hover, .top-links a.active { color: var(--paper); }
.top-links .join {
  color: var(--ink);
  background: var(--paper);
  padding: 0.55rem 1rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s;
}
.top-links .join:hover { background: var(--signal); color: #fff; }

main { flex: 1; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 3rem; padding: 0 1.35rem;
  font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s var(--ease), background 0.2s, border-color 0.2s, color 0.2s;
}
.btn:active { transform: translateY(1px); }
.btn-solid { background: var(--signal); color: #fff; }
.btn-solid:hover { background: #ff734d; }
.btn-line {
  background: transparent;
  border-color: var(--rule-strong);
  color: var(--paper);
}
.btn-line:hover { border-color: var(--paper-dim); }

.page-hero { padding: 3.5rem 0 2.5rem; }
.sec-kicker {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--signal); margin-bottom: 0.85rem;
}
.sec-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600; letter-spacing: -0.035em; line-height: 1.05;
  max-width: 18ch;
}
.sec-lede {
  margin-top: 1rem; font-family: var(--serif);
  font-size: 1.15rem; color: var(--paper-dim); max-width: 48ch; line-height: 1.45;
}
.page-actions { margin-top: 1.75rem; display: flex; flex-wrap: wrap; gap: 0.85rem; }

section.block { padding: 3.5rem 0; border-top: 1px solid var(--rule); }
section.block:first-of-type { border-top: 0; }

.grid-3 {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
}
.card {
  padding: 1.35rem 1.4rem 1.5rem;
  border-right: 1px solid var(--rule);
  background: var(--ink-2);
}
.card:last-child { border-right: 0; }
.card .who {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--signal); margin-bottom: 0.55rem;
}
.card h3 {
  font-size: 1.05rem; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 0.45rem;
}
.card p { color: var(--paper-dim); font-size: 0.92rem; line-height: 1.45; }

.flow {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}
.flow::before {
  content: "";
  position: absolute; top: 1.15rem; left: 8%; right: 8%;
  height: 1px; background: var(--rule-strong);
}
.flow-step { padding: 0 1.25rem 0 0; position: relative; }
.flow-step .idx {
  width: 2.2rem; height: 2.2rem;
  display: grid; place-items: center;
  background: var(--ink); border: 1px solid var(--rule-strong);
  font-family: var(--mono); font-size: 0.75rem; font-weight: 600;
  color: var(--signal); margin-bottom: 1.25rem; position: relative; z-index: 1;
}
.flow-step h3 {
  font-size: 1.15rem; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 0.55rem;
}
.flow-step p { color: var(--paper-dim); font-size: 0.95rem; max-width: 28ch; }

.measure {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
  margin-top: 2rem;
}
.measure > div {
  padding: 1.35rem 1rem;
  border-right: 1px solid var(--rule);
}
.measure > div:last-child { border-right: 0; }
.measure .n {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1;
}
.measure .n em { font-style: normal; font-size: 0.55em; color: var(--signal); }
.measure .l {
  margin-top: 0.45rem; font-size: 0.78rem; color: var(--paper-mute); line-height: 1.35;
}

.ledger {
  margin-top: 2rem;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.ledger th, .ledger td {
  text-align: left; padding: 0.85rem 0.75rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
.ledger th {
  font-family: var(--mono); font-size: 0.65rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--paper-mute);
}
.ledger td:nth-child(n+2) { font-family: var(--mono); font-size: 0.82rem; }
.ledger .task { font-weight: 600; }
.ledger .task small {
  display: block; font-weight: 400; color: var(--paper-mute);
  font-size: 0.78rem; margin-top: 0.25rem; font-family: var(--display);
}
.ledger .lose { color: var(--paper-mute); }
.ledger .win { color: var(--proof); }
.ledger tr.fas td { background: rgba(184, 232, 106, 0.04); }
.delta {
  display: inline-block; margin-left: 0.35rem;
  font-size: 0.65rem; color: var(--proof-ink); background: var(--proof);
  padding: 0.1rem 0.35rem; font-weight: 600;
}

.honesty {
  margin-top: 2rem;
  padding: 1.5rem;
  border: 1px solid var(--rule);
  background: rgba(142, 180, 201, 0.04);
}
.honesty h3 {
  font-size: 0.85rem; font-family: var(--mono); letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--steel); margin-bottom: 0.75rem;
}
.honesty p { color: var(--paper-dim); font-size: 0.92rem; max-width: 72ch; }
.honesty p + p { margin-top: 0.65rem; }
.honesty strong { color: var(--paper); }

.prose {
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--paper-dim);
}
.prose h2 {
  font-family: var(--display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 2.25rem 0 0.85rem;
}
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 1rem; }
.prose ul, .prose ol { margin: 0 0 1rem 1.25rem; }
.prose li + li { margin-top: 0.35rem; }
.prose strong { color: var(--paper); font-weight: 600; }
.prose em { font-style: italic; }
.prose a { color: var(--signal); text-decoration: underline; text-underline-offset: 0.15em; }
.prose blockquote {
  margin: 1.5rem 0;
  padding-left: 1.25rem;
  border-left: 3px solid var(--signal);
  font-style: italic;
  color: var(--paper);
}

.paper-list { margin-top: 2.5rem; display: flex; flex-direction: column; gap: 0; border: 1px solid var(--rule); }
.paper-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.25rem 1.35rem;
  border-bottom: 1px solid var(--rule);
  transition: background 0.2s;
}
.paper-item:last-child { border-bottom: 0; }
.paper-item:hover { background: var(--ink-2); }
.paper-item h2 { font-size: 1.1rem; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 0.35rem; }
.paper-item p { font-size: 0.9rem; color: var(--paper-mute); max-width: 52ch; }
.paper-item .tag {
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--signal);
}
.paper-item .arrow { color: var(--paper-mute); font-size: 1.25rem; }

.back-line {
  margin-top: 2.5rem;
  font-size: 0.9rem;
  color: var(--paper-mute);
}
.back-line a {
  color: var(--paper-dim);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}
.back-line a:hover { color: var(--paper); }

footer {
  padding: 3rem 0 2.5rem;
  border-top: 1px solid var(--rule);
  margin-top: auto;
}
.foot {
  display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap;
}
.foot p {
  margin-top: 0.75rem; color: var(--paper-mute); font-size: 0.9rem; max-width: 34ch;
}
.foot-cols { display: flex; gap: 3rem; flex-wrap: wrap; }
.foot-cols h5 {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--paper-mute); margin-bottom: 0.85rem;
}
.foot-cols a {
  display: block; color: var(--paper-dim); font-size: 0.9rem; margin-bottom: 0.55rem;
}
.foot-cols a:hover { color: var(--paper); }
.foot-bottom {
  margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-size: 0.78rem; color: var(--paper-mute);
}

@media (max-width: 780px) {
  .top-links a:not(.join) { display: none; }
  .grid-3, .flow { grid-template-columns: 1fr; }
  .card { border-right: 0; border-bottom: 1px solid var(--rule); }
  .card:last-child { border-bottom: 0; }
  .flow::before { display: none; }
  .measure { grid-template-columns: 1fr 1fr; }
  .measure > div:nth-child(2n) { border-right: 0; }
  .measure > div:nth-child(-n+4) { border-bottom: 1px solid var(--rule); }
  .ledger { display: block; overflow-x: auto; }
  .paper-item { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

.proof-list { margin-top: 2rem; display: flex; flex-direction: column; gap: 0.75rem; }
.proof { border: 1px solid var(--rule); background: var(--ink-2); }
.proof > summary {
  cursor: pointer; list-style: none;
  padding: 1.15rem 1.35rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-weight: 600; letter-spacing: -0.01em;
}
.proof > summary::-webkit-details-marker { display: none; }
.proof > summary .sg-task small {
  display: block; font-weight: 400; color: var(--paper-mute);
  font-size: 0.8rem; margin-top: 0.2rem;
}
.proof > summary .open-tag {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--signal); white-space: nowrap;
}
.proof[open] > summary { border-bottom: 1px solid var(--rule); }
.proof[open] > summary .open-tag::after { content: " \25be"; }
.proof:not([open]) > summary .open-tag::after { content: " \25b8"; }
.proof-body { padding: 1.35rem; }
.proof-label {
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--paper-mute); margin-bottom: 0.6rem;
}
.proof-prompt {
  font-family: var(--serif); font-size: 1rem; color: var(--paper-dim);
  line-height: 1.55; border-left: 3px solid var(--signal);
  padding-left: 1rem; margin-bottom: 1.75rem;
}
.proof-docs { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.75rem; }
.doc-chip {
  font-family: var(--mono); font-size: 0.72rem; color: var(--paper-dim);
  border: 1px solid var(--rule); padding: 0.3rem 0.5rem; background: var(--ink);
}
.proof-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.proof-side { border: 1px solid var(--rule); display: flex; flex-direction: column; min-width: 0; }
.proof-side h4 { font-size: 0.95rem; font-weight: 600; padding: 0.85rem 1rem 0.4rem; }
.proof-side.lose h4 { color: var(--paper-mute); }
.proof-side.win h4 { color: var(--proof); }
.proof-stat { font-family: var(--mono); font-size: 0.7rem; color: var(--paper-mute); padding: 0 1rem 0.75rem; }
.doc-raw {
  font-family: var(--mono); font-size: 0.72rem; line-height: 1.5;
  color: var(--paper-dim); white-space: pre-wrap; word-break: break-word;
  overflow-y: auto; max-height: 26rem; padding: 0.9rem 1rem;
  border-top: 1px solid var(--rule); background: var(--ink);
}
@media (max-width: 780px) {
  .proof-cols { grid-template-columns: 1fr; }
}