/* ============================================================
   THROTTLECROSS — /riders/ the rider manual
   Sticky station rail · fact cards · class board · rulebook
   accordions · protest fees · race-day template.
   Extends pages.css. Token-driven, hand-authored.
   ============================================================ */

/* ------------------------------------------------------------
   MANUAL LAYOUT — rail + stations
   ------------------------------------------------------------ */
.manual {
  display: grid;
  grid-template-columns: 13.5rem minmax(0, 1fr);
  gap: var(--space-7);
  align-items: start;
}
.rail {
  position: sticky;
  top: calc(var(--head-total) + var(--space-5));
  display: grid;
  gap: .15rem;
  border-left: 1px solid var(--ink-line);
}
/* sliding rail thumb (D2.12): one red indicator GLIDES between
   stations (railSpy writes --rail-y/--rail-h) instead of the
   border-left teleporting. Desktop rail only.                  */
@media (min-width: 981px) {
  .rail::before {
    content: "";
    position: absolute;
    left: -1px; top: 0;
    width: 2px;
    height: var(--rail-h, 2.1rem);
    background: var(--throttle-red);
    transform: translateY(var(--rail-y, .2rem));
    transition: transform .2s var(--ease-out-expo), height .2s var(--ease-out-expo);
    pointer-events: none;
  }
  .rail__link.is-active { border-left-color: transparent; }
}
.rail__link {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .55rem .9rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--bone-mute);
  transition: color var(--dur-fast) ease, border-color var(--dur-fast) ease;
}
.rail__link .no { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .075em; color: var(--bone-mute); }
.rail__link:hover { color: var(--bone); }
.rail__link:active { color: var(--bone); }
.rail__link:active .no { color: var(--throttle-red); }
.rail__link.is-active { color: var(--bone); border-left-color: var(--throttle-red); }
.rail__link.is-active .no { color: var(--throttle-red); }
/* the rail's terminal station (D3.9): one red word — the fire
   control at the end of the instrument panel. Text-red (AA via
   --throttle-red-bright), never spy-highlighted, outside the
   thumb's travel range (railSpy excludes external hrefs).      */
.rail__link--register {
  margin-top: .55rem;
  padding-top: .95rem;
  border-top: 1px solid var(--ink-line);
  color: var(--throttle-red-bright);
}
.rail__link--register .no { color: var(--throttle-red-bright); }
.rail__link--register:hover,
.rail__link--register:active { color: var(--bone); }
.rail__link--register:hover .no { color: var(--bone); }

@media (max-width: 980px) {
  /* minmax(0,·): station min-content was forcing the bare 1fr past
     the wrap, and the full-bleed rail telegraphed it into a 4px
     page pan at 320 (T-001) */
  .manual { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .rail {
    position: sticky;
    top: var(--head-total);
    z-index: 120;
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    gap: .2rem;
    border-left: 0;
    border-bottom: 1px solid var(--ink-line);
    background: var(--ink-veil);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    padding: .5rem var(--space-2);
    margin-inline: calc(-1 * var(--gutter));
    padding-inline: var(--gutter);
    scrollbar-width: none;
  }
  .rail::-webkit-scrollbar { display: none; }
  /* Firefox paints no backdrop blur (T-003) — near-solid veil so
     the stuck strip stays legible over station copy */
  @supports (-moz-appearance: none) {
    .rail { background: var(--ink-veil-solid); }
  }
  .rail__link { border-left: 0; border-bottom: 2px solid transparent; padding: .45rem .6rem; white-space: nowrap; }
  .rail__link.is-active { border-bottom-color: var(--throttle-red); }
  /* mobile strip: the terminal chip after the PRICING/REGISTRATION
     scroll-bys — hairline left rule instead of the desktop top rule */
  .rail__link--register { margin-top: 0; padding-top: .45rem; border-top: 0; border-left: 1px solid var(--ink-line); margin-left: .3rem; padding-left: .9rem; }
}

/* stations */
.station { padding-block: var(--space-7); border-top: 1px solid var(--ink-line); scroll-margin-top: calc(var(--head-total) + 4.2rem); }
.station:first-of-type { border-top: 0; padding-top: 0; }
.station__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-3) var(--space-4); margin-bottom: var(--space-5); }
.station__no {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .075em;
  color: var(--throttle-red);
}
.station__title {
  font-size: clamp(1.7rem, 1.2rem + 2vw, 2.9rem);
  font-weight: 900;
  color: var(--bone);
}
.station__intro { color: var(--bone-dim); max-width: 56ch; margin-bottom: var(--space-5); }

/* ------------------------------------------------------------
   BASICS — fact cards
   ------------------------------------------------------------ */
.fact-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 640px) { .fact-wall { grid-template-columns: 1fr; } }
.fact-card { position: relative; }
.fact-card__fine { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .075em; color: var(--caution); text-transform: uppercase; }
.fact-card--deadline .cell__key { color: var(--throttle-red-bright); }

/* ------------------------------------------------------------
   CLASS BOARD — staging board, manual edition
   ------------------------------------------------------------ */
.classboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--ink-line);
  background:
    repeating-linear-gradient(0deg, oklch(0% 0 0 / .16) 0 1px, transparent 1px 44px),
    var(--ink-raise);
}
.classboard__group { padding: var(--space-5); border-right: 1px solid var(--ink-line); border-bottom: 1px solid var(--ink-line); }
.classboard__group:nth-child(2n) { border-right: 0; }
.classboard__label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: .075em;
  text-transform: uppercase;
  color: var(--bone-mute);
  margin-bottom: var(--space-4);
}
.classboard__label span { color: var(--throttle-red); }
.classboard__chips { display: flex; flex-wrap: wrap; gap: .45rem; }
.classboard__chips li {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .04em;
  color: var(--bone);
  padding: .5rem .75rem;
  background: oklch(13.5% 0.005 300 / .72);
  border: 1px solid var(--ink-line);
  border-radius: 2px;
  transition: border-color var(--dur-fast) ease,
              transform var(--dur-fast) var(--ease-out-expo), scale var(--dur-fast) var(--ease-impact);
}
.classboard__chips li:hover { border-color: var(--throttle-red-dim); transform: translateX(4px) skewX(-3deg); }
/* press (D2.5) */
.classboard__chips li:active { scale: .97; border-color: var(--throttle-red-dim); }
@media (hover: none) {
  .classboard__chips li:active { transform: translateX(4px) skewX(-3deg); }
}
.classboard__group--pro { background: linear-gradient(180deg, var(--red-ghost), transparent 80%); }
.classboard__group--pro .classboard__chips li { border-color: var(--throttle-red-dim); }
@media (max-width: 560px) {
  .classboard { grid-template-columns: 1fr; }
  .classboard__group { border-right: 0 !important; }
}
.classboard-foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-5);
}
.classboard-foot .mono { color: var(--bone-mute); letter-spacing: .075em; }

/* ------------------------------------------------------------
   RULEBOOK — controls + native-details groups
   ------------------------------------------------------------ */
.rule-tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-5);
}
.rule-scan {
  flex: 1 1 16rem;
  display: flex;
  align-items: center;
  gap: .6rem;
  background: var(--ink-raise);
  border: 1px solid var(--ink-line);
  border-radius: 2px;
  padding: .6rem .9rem;
  transition: border-color var(--dur-fast) ease;
}
.rule-scan:focus-within { border-color: var(--holeshot-blue); }
.rule-scan__glyph { color: var(--throttle-red); font-family: var(--font-mono); font-size: .8rem; }
.rule-scan input {
  flex: 1;
  min-width: 0;
  background: none;
  border: 0;
  color: var(--bone);
  font-size: var(--text-small);
}
.rule-scan input:focus { outline: none; }
.rule-scan input::placeholder { color: var(--bone-mute); }
.rule-hits { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .075em; color: var(--bone-mute); text-transform: uppercase; white-space: nowrap; }

.rulebook { display: grid; gap: .6rem; }
.rulebook__group {
  border: 1px solid var(--ink-line);
  background: var(--ink-raise);
}
.rulebook__group[open] { border-color: oklch(35% 0.02 300); }
.rulebook__summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: baseline;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  transition: background var(--dur-fast) ease;
}
.rulebook__summary::-webkit-details-marker { display: none; }
.rulebook__summary:hover { background: oklch(17% 0.01 320 / .55); }
.rulebook__range { font-family: var(--font-mono); font-size: .64rem; font-weight: 700; letter-spacing: .075em; color: var(--throttle-red); white-space: nowrap; }
.rulebook__theme {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 1rem + .6vw, 1.4rem);
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--bone);
}
.rulebook__count { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .075em; color: var(--bone-mute); white-space: nowrap; }
.rulebook__marker {
  font-family: var(--font-mono);
  color: var(--bone-mute);
  transition: rotate var(--dur-fast) var(--ease-out-expo);
}
.rulebook__group[open] .rulebook__marker { rotate: 45deg; color: var(--throttle-red); }
.rulebook__body { border-top: 1px solid var(--ink-line); padding: var(--space-2) 0; }

.rule-list { margin: 0; }
.rule {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid oklch(28% 0.008 300 / .45);
  scroll-margin-top: calc(var(--head-total) + 4.6rem);
}
.rule:last-child { border-bottom: 0; }
.rule.is-hidden { display: none; }
.rule__no {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--holeshot-blue-bright);
  padding-top: .15rem;
  white-space: nowrap;
}
.rule__text { color: var(--bone-dim); font-size: var(--text-small); }
.rule__text strong { color: var(--bone); }
.rule__text .rule-example { display: block; margin-top: .4rem; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .06em; color: var(--bone-mute); }
.rule__src-note {
  display: block;
  margin-top: .45rem;
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .075em;
  text-transform: uppercase;
  color: var(--caution);
}
/* apparel sub-rules */
.sub-rules { margin-top: var(--space-3); display: grid; gap: .55rem; padding-left: 0; }
.sub-rules li { display: grid; grid-template-columns: 2.6rem minmax(0, 1fr); gap: .7rem; color: var(--bone-dim); font-size: var(--text-small); }
.sub-rules .sr-no { font-family: var(--font-mono); font-size: .68rem; font-weight: 700; color: var(--holeshot-blue-bright); }

/* scan filter states */
.rulebook__group.is-hidden { display: none; }
.rule-empty {
  border: 1px dashed var(--ink-line);
  padding: var(--space-5);
  color: var(--bone-mute);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .075em;
  text-transform: uppercase;
}

/* ------------------------------------------------------------
   PROTESTS — statements + fee board
   ------------------------------------------------------------ */
.fee-board {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0 clamp(1.2rem, 1rem + 1.5vw, 2.2rem);
  border-bottom: 1px solid var(--bone-ghost);
  margin-block: var(--space-5);
}
.fee {
  background: transparent;
  border-top: 1px solid var(--bone-ghost);
  padding: var(--space-4) 0;
  display: grid;
  gap: .4rem;
  align-content: start;
}
.fee__amt {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--bone);
}
.fee__for { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .075em; text-transform: uppercase; color: var(--bone-mute); }
@media (max-width: 880px) { .fee-board { grid-template-columns: repeat(2, minmax(0, 1fr)); } .fee:last-child { grid-column: span 2; } }

.statements { display: grid; gap: .6rem; }
.statements li {
  display: flex;
  gap: .7rem;
  align-items: baseline;
  color: var(--bone-dim);
  font-size: var(--text-small);
}
.statements li::before { content: "▸"; color: var(--throttle-red); }
.statements li strong { color: var(--bone); }

/* ------------------------------------------------------------
   RACE DAY — additional info ledger
   ------------------------------------------------------------ */
.info-ledger { display: grid; gap: .6rem; counter-reset: ledger; }
.info-ledger li {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: var(--space-4);
  border: 1px solid var(--ink-line);
  background: var(--ink-raise);
  padding: var(--space-4) var(--space-5);
  color: var(--bone-dim);
  font-size: var(--text-small);
}
.info-ledger li::before {
  counter-increment: ledger;
  content: counter(ledger, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  color: var(--throttle-red);
  padding-top: .15rem;
}
.info-ledger strong { color: var(--bone); }

/* pro strip */
.pro-strip {
  border: 1px solid var(--throttle-red-dim);
  background: linear-gradient(105deg, var(--red-ghost), transparent 60%);
  padding: var(--space-5);
  display: grid;
  gap: var(--space-4);
}
.pro-strip__classes { display: flex; flex-wrap: wrap; gap: .6rem; }
.pro-strip__classes li {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: .05em;
  color: var(--bone);
  border: 1px solid var(--throttle-red-dim);
  padding: .55rem .95rem;
  border-radius: 2px;
}
.pro-strip p { color: var(--bone-dim); font-size: var(--text-small); max-width: 62ch; }

/* print: the manual is the gate-bag document */
@media print {
  .rail, .rule-tools { display: none !important; }
  .rulebook__group { border-color: #bbb; background: #fff; }
  .rule__text, .station__intro, .statements li, .info-ledger li { color: #222; }
  .rule__no, .rulebook__range { color: #444; }
}