/* "Why not a chat prompt?" comparison figure on the Paper Review pages.
   Left: one chat prompt, deliberately quiet. Right: what the pipeline literally runs
   (backend/latextools/papercheck.py run_review_pipeline). Tokens only, no hex; dark is the default theme. */

.prc {
  max-width: 1040px;
  margin: 3rem auto 2rem;
  padding: 0 1rem;
}
.prc > h2 { font-family: var(--font-display); text-align: center; margin-bottom: 0.5rem; }
.prc-lede {
  max-width: 62ch;
  margin: 0 auto 1.75rem;
  text-align: center;
  color: var(--muted);
  line-height: 1.55;
}

.prc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.15fr);
  gap: 1.25rem;
  align-items: stretch;
}

.prc-col {
  border-radius: 20px;
  padding: 1.4rem 1.4rem 1.5rem;
}
.prc-col-h {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
}
.prc-col-sub {
  margin: 0.15rem 0 1.1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---- Left: one chat prompt ---------------------------------------------- */
.prc-chat {
  border: 1.5px dashed var(--field-line);
  background: color-mix(in oklch, var(--muted) 5%, var(--bg));
}
.prc-chat .prc-col-h { color: var(--muted); }

.prc-mini {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.prc-mini li {
  width: 100%;
  text-align: center;
  font-size: 0.9rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
  background: var(--panel);
}
.prc-mini li + li { margin-top: 1.4rem; position: relative; }
.prc-mini li + li::before {
  content: "";
  position: absolute;
  left: 50%;
  top: calc(-1.4rem - 1px);
  width: 1.5px;
  height: 1.4rem;
  background: var(--field-line);
}

.prc-gaps {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--muted);
}
.prc-gaps li {
  position: relative;
  padding-left: 1.4rem;
  margin: 0.55rem 0;
}
.prc-gaps li::before {
  content: "";
  position: absolute;
  left: 0.15rem;
  top: 0.62em;
  width: 0.7rem;
  height: 1.5px;
  background: var(--field-line);
}

/* ---- Right: the pipeline ------------------------------------------------- */
.prc-pipe {
  position: relative;
  border: 1.5px solid color-mix(in oklch, var(--purple) 45%, var(--line));
  background:
    linear-gradient(color-mix(in oklch, var(--purple) 7%, transparent) 1px, transparent 1px) 0 0 / 22px 22px,
    linear-gradient(90deg, color-mix(in oklch, var(--purple) 7%, transparent) 1px, transparent 1px) 0 0 / 22px 22px,
    color-mix(in oklch, var(--purple) 4%, var(--panel));
  box-shadow: var(--elev-2), 0 0 0 6px color-mix(in oklch, var(--purple) 8%, transparent);
}
.prc-pipe .prc-col-h { color: var(--purple); }

.prc-stages {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
/* The rail that ties the stages together. */
.prc-stages::before {
  content: "";
  position: absolute;
  left: 0.95rem;
  top: 1rem;
  bottom: 1rem;
  width: 2px;
  background: linear-gradient(var(--purple), color-mix(in oklch, var(--purple) 35%, transparent));
}
.prc-stage {
  position: relative;
  padding-left: 2.75rem;
  margin: 0 0 1.1rem;
}
.prc-stage:last-child { margin-bottom: 0; }
.prc-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--bg);
  background: var(--purple);
  box-shadow: 0 0 0 4px color-mix(in oklch, var(--purple) 18%, transparent);
}
.prc-stage-h {
  display: block;
  font-weight: 700;
  color: var(--ink);
  line-height: 2rem;
}
.prc-stage p {
  margin: 0.1rem 0 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--muted);
}

.prc-lanes {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}
.prc-lane {
  border: 1px solid color-mix(in oklch, var(--purple) 30%, var(--line));
  border-radius: 14px;
  padding: 0.85rem 0.9rem 0.9rem;
  background: var(--panel);
  box-shadow: var(--elev-1);
}
.prc-lane-h {
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink);
  margin-bottom: 0.35rem;
}
.prc-lane-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--purple);
  margin-bottom: 0.35rem;
}
.prc-lane ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--muted);
}
.prc-lane ul li {
  position: relative;
  padding-left: 0.95rem;
  margin: 0.3rem 0;
}
.prc-lane ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  background: var(--purple-dim);
}

.prc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0 0 0.45rem;
  padding: 0;
  list-style: none;
}
.prc-chips li {
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  color: var(--ink);
  background: color-mix(in oklch, var(--purple) 14%, var(--panel));
  border: 1px solid color-mix(in oklch, var(--purple) 35%, transparent);
}
.prc-lane .prc-chips li { padding: 0.18rem 0.6rem; margin: 0; }
.prc-lane .prc-chips li::before { content: none; }

.prc-roles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 0.6rem;
}

.prc-foot {
  max-width: 70ch;
  margin: 1.1rem auto 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}

@media (max-width: 760px) {
  .prc-grid { grid-template-columns: minmax(0, 1fr); }
  .prc-pipe { order: -1; }
}
@media (max-width: 520px) {
  .prc-lanes { grid-template-columns: minmax(0, 1fr); }
}