/* Performance Truck Forum: "dyno sheet" layout. carbon sheet, desert orange trace, sand readouts. */
:root {
  --carbon: #121417;
  --panel: #191C20;
  --panel-2: #1F2328;
  --rule: #2C3138;
  --grid: rgba(216, 199, 168, .045);
  --ink: #ECE6DA;
  --sand: #D8C7A8;
  --gray: #7B8189;
  --muted: #A3A8B0;
  --orange: #E86A1C;
  --orange-hi: #F38A45;
  --focus: #F2B27F;
  --display: "Rajdhani", "Arial Narrow", sans-serif;
  --body: "Inter Tight", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--carbon);
  color: var(--ink);
  font: 400 16px/1.6 var(--body);
}
a { color: var(--orange-hi); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 2px; }
img { max-width: 100%; }

/* ---------- header: graph paper strip + one torque trace ---------- */
.hd {
  position: relative;
  border-bottom: 1px solid var(--rule);
  background-color: #15181B;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  overflow: hidden;
}
.hd-in {
  position: relative; z-index: 1;
  max-width: 1160px; margin: 0 auto; padding: 18px 20px 14px;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; }
.logo { height: 44px; width: auto; display: block; }
.hd-tag {
  margin: 0; flex: 1 1 260px;
  font: 600 17px/1.2 var(--display); letter-spacing: .02em; color: var(--sand);
}
.hd-cta {
  font: 700 15px/1 var(--display); letter-spacing: .04em;
  color: var(--carbon); background: var(--orange); text-decoration: none;
  padding: 10px 14px; border-radius: 3px;
}
.hd-cta:hover { background: var(--orange-hi); color: var(--carbon); }
.trace {
  position: absolute; left: 0; right: 0; bottom: 38px; width: 100%; height: 70px;
  pointer-events: none; opacity: .55;
}
.trace path { fill: none; stroke: var(--orange); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.trace path.tq { stroke: var(--gray); stroke-dasharray: 4 5; }
.tabs {
  position: relative; z-index: 1;
  max-width: 1160px; margin: 0 auto; padding: 0 20px;
  display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs a {
  flex: 0 0 auto;
  font: 600 16px/1 var(--display); letter-spacing: .02em;
  color: var(--muted); text-decoration: none;
  padding: 11px 14px 10px; border: 1px solid transparent; border-bottom: 0;
  border-radius: 4px 4px 0 0;
}
.tabs a:hover { color: var(--ink); }
.tabs a[aria-current="page"] {
  color: var(--ink); background: var(--carbon); border-color: var(--rule);
  box-shadow: inset 0 2px 0 var(--orange);
}

/* ---------- sheet layout ---------- */
.sheet {
  max-width: 1160px; margin: 0 auto; padding: 26px 20px 48px;
  display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 28px;
}
.main { min-width: 0; }
.side { min-width: 0; display: flex; flex-direction: column; gap: 18px; }

.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 10px; }
.crumbs a { color: var(--sand); }
.crumbs span { margin: 0 7px; color: var(--gray); }

.page-title, .prose h1, .thread-head h1 {
  font: 700 clamp(28px, 4.2vw, 40px)/1.08 var(--display);
  letter-spacing: .01em; margin: 0 0 8px; color: var(--ink);
}
.page-sub { margin: 0 0 22px; color: var(--muted); max-width: 66ch; }

.panel { background: var(--panel); border: 1px solid var(--rule); border-radius: 4px; }
.panel-h {
  margin: 0; padding: 11px 16px; border-bottom: 1px solid var(--rule);
  font: 700 18px/1.2 var(--display); letter-spacing: .02em; color: var(--sand);
  display: flex; justify-content: space-between; align-items: baseline; gap: 10px;
}
.panel-h small { font: 500 13px/1 var(--body); color: var(--muted); letter-spacing: 0; }
.panel + .panel { margin-top: 22px; }

/* boards as spec table */
.spec { width: 100%; border-collapse: collapse; }
.spec td { padding: 14px 16px; border-top: 1px solid var(--rule); vertical-align: top; }
.spec tr:first-child td { border-top: 0; }
.spec .bn { display: block; font: 700 21px/1.15 var(--display); color: var(--ink); text-decoration: none; }
.spec .bn:hover { color: var(--orange-hi); }
.spec p { margin: 3px 0 0; color: var(--muted); font-size: 15px; }
.spec .read { width: 92px; text-align: right; white-space: nowrap; }
.read b { display: block; font: 700 26px/1 var(--display); color: var(--orange-hi); }
.read i { font-style: normal; font-size: 12px; color: var(--muted); }

/* thread rows with activity gauge */
.runs { list-style: none; margin: 0; padding: 0; }
.run {
  display: grid; grid-template-columns: minmax(0, 1fr) 150px 128px; gap: 16px; align-items: center;
  padding: 13px 16px; border-top: 1px solid var(--rule);
}
.runs > .run:first-child { border-top: 0; }
.run-t { display: block; font-weight: 600; color: var(--ink); text-decoration: none; line-height: 1.35; }
.run-t:hover { color: var(--orange-hi); }
.run-by { margin-top: 3px; font-size: 13.5px; color: var(--muted); }
.run-by b { color: var(--sand); font-weight: 500; }
.run-by a { color: var(--muted); }
.pin {
  display: inline-block; margin-right: 7px; padding: 1px 6px 0; border-radius: 2px;
  font: 700 13px/1.4 var(--display); letter-spacing: .03em; color: var(--carbon); background: var(--sand);
  vertical-align: 2px;
}
.gauge { font-size: 12.5px; color: var(--muted); }
.gauge-track { height: 6px; background: #262A30; border-radius: 3px; overflow: hidden; margin-bottom: 5px; }
.gauge-fill { display: block; height: 100%; width: var(--g, 30%); background: linear-gradient(90deg, #8A4316, var(--orange)); }
.gauge b { color: var(--ink); font-weight: 600; }
.run-last { font-size: 12.5px; color: var(--muted); line-height: 1.35; }
.run-last span:first-child { display: block; color: var(--ink); font-size: 13.5px; }

/* side readouts */
.dials { display: grid; grid-template-columns: repeat(3, 1fr); }
.dials div { padding: 14px 10px; text-align: center; border-left: 1px solid var(--rule); }
.dials div:first-child { border-left: 0; }
.dials b { display: block; font: 700 28px/1 var(--display); color: var(--ink); }
.dials span { font-size: 12px; color: var(--muted); }
.links { list-style: none; margin: 0; padding: 6px 16px 12px; }
.links li { padding: 8px 0; border-top: 1px dashed var(--rule); }
.links li:first-child { border-top: 0; }
.links a { color: var(--ink); text-decoration: none; font-weight: 500; }
.links a:hover { color: var(--orange-hi); }
.links span { display: block; font-size: 12.5px; color: var(--muted); }
.ranks { list-style: none; margin: 0; padding: 8px 16px 14px; }
.ranks li { display: flex; justify-content: space-between; gap: 8px; padding: 5px 0; font-size: 14px; }
.ranks b { font: 700 16px/1.2 var(--display); color: var(--sand); }
.ranks span { color: var(--muted); }
.note { padding: 12px 16px 14px; margin: 0; color: var(--muted); font-size: 14px; }
.tags { list-style: none; margin: 0; padding: 12px 16px 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.tags li { font-size: 12.5px; padding: 3px 8px; border: 1px solid var(--rule); border-radius: 2px; color: var(--sand); }

/* ---------- thread ---------- */
.thread-head { padding-bottom: 14px; margin-bottom: 18px; border-bottom: 1px solid var(--rule); }
.thread-head .meta { font-size: 14px; color: var(--muted); }
.thread-head .meta b { color: var(--sand); font-weight: 500; }
.posts { display: flex; flex-direction: column; gap: 16px; }

.post { background: var(--panel); border: 1px solid var(--rule); border-radius: 4px; }
.post.is-op { border-left: 3px solid var(--orange); }
.post-bar {
  display: grid; grid-template-columns: 46px minmax(0, 1fr) auto; gap: 12px; align-items: start;
  padding: 13px 16px 12px; background: var(--panel-2); border-bottom: 1px solid var(--rule);
  border-radius: 4px 4px 0 0;
}
.plate {
  width: 46px; height: 46px; border-radius: 3px; display: grid; place-items: center;
  background: var(--c, #3A4048); color: #F4EFE6; font: 700 24px/1 var(--display);
}
.author-name { font: 700 19px/1.15 var(--display); color: var(--ink); letter-spacing: .01em; overflow-wrap: anywhere; }
.op-tag {
  margin-left: 7px; padding: 1px 5px 0; border: 1px solid var(--orange); border-radius: 2px;
  font: 700 12px/1.3 var(--display); color: var(--orange-hi); vertical-align: 2px;
}
.build { margin-top: 2px; font: 600 15px/1.3 var(--display); color: var(--sand); letter-spacing: .015em; }
.build::before { content: "build: "; color: var(--gray); font-weight: 500; }
.ident-meta { margin-top: 4px; display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 13px; color: var(--muted); }
.rank { color: var(--ink); font-weight: 600; }
.rank.r-mod { color: var(--orange-hi); }
.stamp { text-align: right; font-size: 13px; color: var(--muted); white-space: nowrap; }
.stamp time { display: block; }
.post-number { color: var(--sand); text-decoration: none; font: 700 15px/1.6 var(--display); }

.post-content { padding: 14px 18px 4px; overflow-wrap: break-word; }
.post-content p { margin: 0 0 13px; max-width: 74ch; }
.post-content strong { color: var(--sand); }
.post-content blockquote {
  margin: 0 0 13px; padding: 9px 13px; background: #15181B; border-left: 2px solid var(--gray);
  color: var(--muted); font-size: 15px;
}
.post-content blockquote cite { display: block; font: 600 14px/1.3 var(--display); font-style: normal; color: var(--sand); margin-bottom: 3px; }
.post-footer { display: flex; gap: 6px; padding: 6px 14px 12px; }
.post-action, .post-link {
  font: 600 14px/1 var(--display); letter-spacing: .02em; color: var(--muted);
  background: none; border: 1px solid var(--rule); border-radius: 3px; padding: 6px 10px; cursor: pointer;
  text-decoration: none;
}
.post-action:hover, .post-link:hover { color: var(--ink); border-color: var(--gray); }
.reply-box {
  margin-top: 20px; padding: 14px 16px; border: 1px dashed var(--gray); border-radius: 4px; color: var(--muted); font-size: 15px;
}

/* ---------- static pages ---------- */
.prose { max-width: 70ch; }
.prose h2 { font: 700 23px/1.2 var(--display); color: var(--sand); margin: 28px 0 8px; }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 8px; }

/* ---------- footer: printout tail ---------- */
.ft { border-top: 1px dashed var(--gray); background: #0F1114; }
.ft-in {
  max-width: 1160px; margin: 0 auto; padding: 26px 20px 30px;
  display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 24px; align-items: start;
}
.logo-sm { height: 30px; width: auto; display: block; margin-bottom: 8px; }
.ft p { margin: 0; font-size: 13.5px; color: var(--muted); }
.ft-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; }
.ft-nav a { color: var(--sand); font-size: 14px; text-decoration: none; }
.ft-nav a:hover { color: var(--orange-hi); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .sheet { grid-template-columns: 1fr; }
  .ft-in { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .run { grid-template-columns: 1fr 1fr; gap: 8px 14px; }
  .run > div:first-child { grid-column: 1 / -1; }
  .post-bar { grid-template-columns: 40px minmax(0, 1fr); }
  .plate { width: 40px; height: 40px; font-size: 21px; }
  .stamp { grid-column: 1 / -1; text-align: left; display: flex; gap: 10px; align-items: baseline; }
  .post-content { padding: 12px 14px 2px; }
  .trace { display: none; }
  .hd-tag { font-size: 15px; }
  .spec .read { width: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}