/* ============================================================
   app.css — the interactive layer for the Gittensor fascicle.

   Loaded after the inline <style> in index.html, so it reuses the
   same design tokens (--paper, --ink, --vermillion, --font-mono…).
   Everything here is scoped under `html.js`: with JavaScript off,
   none of it applies and the page stays the static monograph it was.
   ============================================================ */

/* ---------- SCROLL-REVEAL GATING ----------
   The inline stylesheet starts the SVG draw-in animations on load.
   With JS present we pause them and only let a plate's animations run
   once it has scrolled into view (the .revealed class is added by JS).
   No-JS path is untouched: the animations simply run as before. */
html.js .plate svg .draw,
html.js .masthead svg .draw { animation-play-state: paused; }
html.js .plate.revealed svg .draw,
html.js .masthead.revealed svg .draw { animation-play-state: running; }

/* gentle fade-up of plate bodies as they enter (hero left untouched) */
html.js .plate > .col {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1);
}
html.js .plate.revealed > .col { opacity: 1; transform: none; }

/* ---------- PLATE-NAV RAIL ----------
   A fixed vertical index on the right; one tick per plate, the current
   one marked. Built by JS from the plate ids and labels. */
.plate-rail {
  position: fixed;
  top: 50%;
  right: 22px;
  transform: translateY(-50%);
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 14px 10px;
}
.plate-rail a {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 0;
  text-decoration: none;
  color: var(--sepia);
  font-variant: small-caps;
  letter-spacing: .16em;
  font-size: 11px;
  line-height: 1;
  opacity: .55;
  transition: opacity .25s ease, color .25s ease;
}
.plate-rail a .tick {
  width: 22px;
  height: 1px;
  background: var(--rule);
  transition: width .25s ease, background .25s ease;
  display: inline-block;
}
.plate-rail a .rail-label {
  opacity: 0;
  transform: translateX(6px);
  transition: opacity .25s ease, transform .25s ease;
  white-space: nowrap;
}
.plate-rail a:hover { opacity: 1; color: var(--vermillion); }
.plate-rail a:hover .rail-label { opacity: 1; transform: none; }
.plate-rail a:hover .tick { width: 30px; background: var(--vermillion); }
.plate-rail a.active {
  opacity: 1;
  color: var(--vermillion);
}
.plate-rail a.active .tick { width: 38px; background: var(--vermillion); height: 2px; }
.plate-rail a.active .rail-label { opacity: 1; transform: none; }

/* reading-progress hairline at the very top of the page */
.read-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: var(--vermillion);
  z-index: 50;
  transition: width .1s linear;
}

/* ---------- SHARED INTERACTIVE BLOCK CHROME ---------- */
.demo {
  margin: 40px 0 8px;
  max-width: 860px;
}
.demo-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-variant: small-caps;
  letter-spacing: .16em;
  font-size: 12.5px;
  color: var(--vermillion);
  margin-bottom: 14px;
}
.demo-head::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--rule);
  position: relative;
  top: -4px;
}
.btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 7px 14px;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover { background: var(--paper-3); border-color: var(--vermillion); }
.btn:focus-visible { outline: 2px solid var(--vermillion); outline-offset: 2px; }
.btn.primary { background: var(--vermillion); color: var(--paper); border-color: var(--vermillion-2); }
.btn.primary:hover { background: var(--vermillion-2); }
.btn[disabled] { opacity: .4; cursor: default; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

/* ---------- 1 · LIVE TERMINAL ---------- */
.terminal {
  background: #17120a;
  color: #e8dcc0;
  border: 1px solid var(--ink);
  border-radius: 5px;
  box-shadow: 0 14px 28px -16px rgba(26,18,8,.6), inset 0 0 0 1px rgba(232,220,192,.05);
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.6;
  overflow: hidden;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: #221a0f;
  border-bottom: 1px solid #0d0a05;
}
.terminal-bar .dot { width: 11px; height: 11px; border-radius: 50%; background: #4a3c26; }
.terminal-bar .dot.r { background: #a82c1c; }
.terminal-bar .dot.y { background: #b8923a; }
.terminal-bar .dot.g { background: #5f7a3a; }
.terminal-bar .ttl {
  margin-left: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: #9a8a68;
}
.terminal-body {
  padding: 18px 20px 22px;
  min-height: 280px;
  white-space: pre-wrap;
  word-break: break-word;
}
.terminal-body .cmd { color: #f1ead3; }
.terminal-body .cmd .p { color: #d8643f; }
.terminal-body .ok { color: #8fae5e; }
.terminal-body .dim { color: #9a8a68; }
.terminal-body .accent { color: #e0a253; }
.terminal-body .cursor {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  background: #e0a253;
  vertical-align: text-bottom;
  animation: term-blink 1s steps(1) infinite;
}
@keyframes term-blink { 50% { opacity: 0; } }

/* ---------- 2 · REVIEW-GATE SIMULATOR ---------- */
.gate {
  margin-top: 18px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 28px 26px 24px;
  position: relative;
}
.gate::before {
  content: "";
  position: absolute; inset: 8px;
  border: 1px dashed rgba(110,91,58,.32);
  pointer-events: none;
}
.gate-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  align-items: stretch;
  position: relative;
}
.chamber {
  text-align: center;
  padding: 18px 10px 16px;
  border: 1px solid var(--rule);
  border-right: 0;
  background: var(--paper);
  opacity: .42;
  transition: opacity .35s ease, background .35s ease, box-shadow .35s ease;
  position: relative;
}
.chamber:last-child { border-right: 1px solid var(--rule); }
.chamber .rn {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 13px;
  color: var(--vermillion);
  font-variant: small-caps;
  letter-spacing: .16em;
}
.chamber .nm {
  font-family: var(--font-display);
  font-size: 21px;
  color: var(--ink);
  margin-top: 4px;
}
.chamber .ic { font-size: 26px; line-height: 1; margin-top: 8px; color: var(--sepia); }
.chamber.lit {
  opacity: 1;
  background: var(--paper);
  box-shadow: inset 0 3px 0 var(--vermillion);
}
.chamber.done { opacity: .85; }
.chamber.done .ic { color: var(--vermillion); }
.gate-readout {
  margin-top: 20px;
  min-height: 3em;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
  border-left: 2px solid var(--rule);
  padding: 6px 0 6px 16px;
  transition: border-color .3s ease, color .3s ease;
}
.gate-readout.err { border-left-color: var(--vermillion); color: var(--vermillion-2); }
.gate-readout.ok  { border-left-color: #5f7a3a; }
.gate-readout .mono-id { color: var(--vermillion); }

/* ---------- 3 · CLAIM CATALOGUE ---------- */
.catalogue-x { margin-top: 18px; }
.cat-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.cat-search {
  flex: 1 1 220px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: 8px 12px;
}
.cat-search input {
  flex: 1;
  border: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  outline: none;
}
.cat-search .mag { color: var(--sepia); font-size: 14px; }
.cat-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.cat-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--sepia);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 5px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: all .2s ease;
}
.cat-tag:hover { border-color: var(--vermillion); color: var(--vermillion); }
.cat-tag.on { background: var(--vermillion); color: var(--paper); border-color: var(--vermillion-2); }
.cat-count { font-style: italic; color: var(--sepia); font-size: 14px; margin-left: auto; }

.cat-list { display: grid; grid-template-columns: 1fr; gap: 12px; }
.claim {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--vermillion);
  background: var(--paper);
  padding: 16px 18px;
  cursor: pointer;
  transition: box-shadow .2s ease, transform .2s ease;
}
.claim:hover { box-shadow: 0 8px 18px -14px rgba(26,18,8,.5); }
.claim .claim-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}
.claim .cid {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--vermillion);
  letter-spacing: -.01em;
}
.claim .conf { font-style: italic; color: var(--sepia); font-size: 13px; white-space: nowrap; }
.claim .ctext { margin: 8px 0 0; font-size: 17px; color: var(--ink-2); line-height: 1.45; }
.claim .cmeta {
  display: none;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dotted var(--rule);
  font-size: 14px;
  color: var(--sepia);
}
.claim.open .cmeta { display: block; }
.claim .cmeta .lbl {
  font-variant: small-caps;
  letter-spacing: .12em;
  color: var(--vermillion);
  font-size: 12px;
  margin-right: 8px;
}
.claim .ctags { margin-top: 8px; display: flex; gap: 6px; flex-wrap: wrap; }
.claim .ctags span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sepia);
  border: 1px solid var(--rule);
  padding: 2px 8px;
  border-radius: 999px;
}
.cat-empty { font-style: italic; color: var(--sepia); padding: 20px 0; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 920px) {
  .plate-rail { display: none; }
  .gate-track { grid-template-columns: 1fr 1fr; }
  .chamber { border-right: 1px solid var(--rule); }
  .terminal-body { min-height: 240px; font-size: 13.5px; }
}

/* ---------- REDUCED MOTION ----------
   Honour the OS setting: show every final state, animate nothing. */
@media (prefers-reduced-motion: reduce) {
  html.js .plate svg .draw,
  html.js .masthead svg .draw {
    animation: none !important;
    stroke-dashoffset: 0 !important;
  }
  html.js .plate > .col { opacity: 1 !important; transform: none !important; transition: none !important; }
  .terminal-body .cursor { animation: none; }
  .read-progress { transition: none; }
  * { scroll-behavior: auto !important; }
}