/* Aldermay: an instrument panel. Every block is a module bolted to the deck. */

:root {
  --bg: #0A2730;
  --panel: #103540;
  --line: #25505C;
  --ink: #E9F3F4;
  --mute: #A3BDC2;
  --amber: #FFB547;
  --on-amber: #0A2730;
  --amber-12: rgba(255, 181, 71, .12);
  --amber-22: rgba(255, 181, 71, .22);

  --r: 6px;
  --gap: 8px;
  --pad: clamp(18px, 1.9vw, 28px);
  --sans: 'Saira', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --cond: 'Saira Condensed', 'Arial Narrow', system-ui, sans-serif;
  --screw: url(../images/dzus.svg);
}

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 76px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; }
svg { display: block; max-width: 100%; }
::selection { background: var(--amber); color: var(--on-amber); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

h1 { font: 800 clamp(2.3rem, 9.4vw, 4.6rem)/1 var(--sans); letter-spacing: -.01em; }
h1 em { display: block; font-style: normal; color: var(--amber); }
h2 { font: 700 clamp(1.85rem, 3.1vw, 3rem)/1.08 var(--sans); text-wrap: balance; }
h3 { font: 600 clamp(1.25rem, 1.7vw, 1.6rem)/1.18 var(--sans); }
h4 { font: 600 1.0625rem/1.25 var(--sans); }

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 40;
  padding: 10px 14px;
  border-radius: var(--r);
  background: var(--amber);
  color: var(--on-amber);
  font: 600 1rem/1 var(--cond);
}
.skip:focus { top: 10px; }

/* Placards: the engraved caps on every instrument */
.plc {
  font: 600 .8125rem/1.25 var(--cond);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mute);
}
.plc-v { color: var(--amber); font-weight: 600; }

/* Annunciators: lit by default, dark only until JS powers them up */
.tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 5px 10px;
  border: 1px solid var(--amber);
  border-radius: var(--r);
  background-color: var(--amber-12);
  box-shadow: 0 0 12px var(--amber-22);
  color: var(--amber);
  font: 600 .8125rem/1.15 var(--cond);
  letter-spacing: .1em;
  text-transform: uppercase;
  text-align: center;
}

/* Push buttons */
.push {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--amber);
  border-radius: var(--r);
  background: var(--amber);
  box-shadow: 0 3px 0 var(--line);
  color: var(--on-amber);
  font: 600 1.0625rem/1.1 var(--cond);
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: transform .1s, box-shadow .1s, color .15s, border-color .15s;
}
.push:hover { box-shadow: 0 3px 0 var(--mute); }
.push:active { transform: translateY(3px); box-shadow: none; }
.push[disabled] { opacity: .65; cursor: wait; }
.push-q { background: transparent; border-color: var(--mute); box-shadow: none; color: var(--ink); }
.push-q:hover { border-color: var(--amber); box-shadow: none; color: var(--amber); }
.push-q:active { transform: translateY(1px); }
.push-s { min-height: 42px; padding: 0 16px; font-size: .9375rem; }

.jump {
  align-self: flex-start;
  display: inline-block;
  margin-top: auto;
  padding: 10px 0 6px;
  color: var(--amber);
  font: 600 .9375rem/1.2 var(--cond);
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.jump:hover { text-decoration-thickness: 2px; }

/* Glareshield: header with the row of signal plates */
.shield {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  padding: 10px max(clamp(16px, 2.4vw, 32px), calc((100% - 1560px) / 2 + 32px));
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  font: 800 1.125rem/1 var(--sans);
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
}
.mark svg { width: 28px; height: 28px; flex: none; }
.mark-ring { fill: var(--panel); stroke: var(--mute); stroke-width: 1.2; }
.mark-needle, .mark-hub { fill: var(--amber); }

.signals { display: flex; align-items: center; gap: 6px; }

.sig {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--bg);
  color: var(--mute);
  font: 600 .8125rem/1 var(--cond);
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  transition: color .15s, border-color .15s, background-color .15s, box-shadow .15s;
}
.sig:hover { border-color: var(--mute); color: var(--ink); }
.sig:active { transform: translateY(1px); }
.sig[aria-current] {
  border-color: var(--amber);
  background-color: var(--amber-12);
  box-shadow: 0 0 12px var(--amber-22);
  color: var(--amber);
}
.sig-go, .sig-go[aria-current], .sig-go:hover {
  border-color: var(--amber);
  background-color: var(--amber);
  color: var(--on-amber);
}

.burger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--mute);
  border-radius: var(--r);
  background: var(--panel);
  color: var(--ink);
  font: 600 .875rem/1 var(--cond);
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
}
.burger[aria-expanded="true"] { border-color: var(--amber); color: var(--amber); }
.burger-bars {
  position: relative;
  width: 18px;
  height: 12px;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}
.burger-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 3px;
  height: 2px;
  background: currentColor;
}

@media (max-width: 1039.98px) {
  html.js .signals {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    max-height: calc(100vh - 62px);
    overflow: auto;
    padding: 12px 16px 16px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
  }
  html.js .signals.open { display: grid; }
  .signals .sig { min-height: 46px; }
  html:not(.js) .shield { position: static; flex-wrap: wrap; }
  html:not(.js) .signals { flex-wrap: wrap; }
  html:not(.js) .burger { display: none; }
}
@media (min-width: 1040px) {
  .burger { display: none; }
}

/* Deck, bays and racks */
.deck {
  width: 100%;
  max-width: 1560px;
  margin-inline: auto;
  padding-inline: clamp(16px, 2.4vw, 32px);
}
.bay { padding-top: clamp(44px, 6vw, 84px); }
.bay-main { padding-top: var(--gap); }

.rack {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.rack > * { grid-column: 1 / -1; min-width: 0; }
.rack > .m1 { grid-column: span 1; }

@media (min-width: 720px) {
  .rack { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .rack > .t2 { grid-column: span 2; }
  .rack > .t3 { grid-column: span 3; }
  .rack > .t6 { grid-column: span 6; }
}
@media (min-width: 1100px) {
  .rack { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .rack > .d2 { grid-column: span 2; }
  .rack > .d3 { grid-column: span 3; }
  .rack > .d4 { grid-column: span 4; }
  .rack > .d5 { grid-column: span 5; }
  .rack > .d7 { grid-column: span 7; }
  .rack > .d8 { grid-column: span 8; }
  .rack > .d12 { grid-column: span 12; }
}

/* Module: a block with four fasteners */
.mod {
  position: relative;
  min-width: 0;
  padding: var(--pad);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background:
    var(--screw) 7px 7px / 9px no-repeat,
    var(--screw) calc(100% - 7px) 7px / 9px no-repeat,
    var(--screw) 7px calc(100% - 7px) / 9px no-repeat,
    var(--screw) calc(100% - 7px) calc(100% - 7px) / 9px no-repeat,
    var(--panel);
}

/* Demarcation lines, the way an overhead panel groups its switches */
.groove {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  color: var(--ink);
  font: 600 .875rem/1 var(--cond);
  letter-spacing: .16em;
  text-transform: uppercase;
}
.groove::before, .groove::after {
  content: "";
  height: 10px;
  border-top: 1px solid var(--mute);
  transform: translateY(5px);
}
.groove::before { flex: none; width: 28px; border-left: 1px solid var(--mute); }
.groove::after { flex: 1; border-right: 1px solid var(--mute); }
.groove span { flex: none; max-width: 72%; line-height: 1.2; }
.groove-sub { margin-top: clamp(24px, 2.8vw, 36px); }

.intro {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(20px, 2.6vw, 36px);
}
.intro > p { max-width: 60ch; color: var(--mute); }

@media (min-width: 900px) {
  .intro-split {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 40px;
    align-items: end;
  }
}

.intro-lg h2 { font-size: clamp(2rem, 3.6vw, 3.8rem); font-weight: 800; line-height: 1.04; }
.intro-lg h2 span { display: block; }
.intro-lg h2 span:last-child { color: var(--amber); }
.intro-lg { justify-content: space-between; }

/* Main panel */
.lede {
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 2.2vw, 30px);
  padding: clamp(18px, 3vw, 44px);
}
.tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.lede-p { max-width: 58ch; font-size: clamp(1.0625rem, 1.35vw, 1.25rem); line-height: 1.5; }
.lede-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; padding-bottom: 3px; }

@media (min-width: 1100px) {
  h1 { font-size: clamp(4rem, 6.1vw, 6rem); }
}

.inst { display: flex; flex-direction: column; gap: 12px; }
.inst .gauge { width: 100%; max-width: 420px; height: auto; margin: auto; }
.inst-note { margin-top: auto; color: var(--mute); font: 500 .9375rem/1.3 var(--cond); letter-spacing: .02em; }

.bank {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(106px, 1fr));
  gap: 6px;
}
.bank .tab { width: 100%; }
.bank-s { margin-block: 4px; }

.ratios { width: 100%; max-width: 330px; height: auto; margin-block: auto; }
.fr { fill: none; stroke: var(--amber); stroke-width: 2; transition: stroke .3s calc(var(--i, 0) * 240ms); }
.fr-t { fill: var(--ink); font: 600 16px var(--cond); letter-spacing: .06em; }

/* Gauges */
.g-face { fill: var(--bg); stroke: var(--line); stroke-width: 2; }
.g-ring { fill: none; stroke: var(--line); }
.g-arc { fill: none; stroke: var(--amber); stroke-width: 3; }
.g-min { fill: none; stroke: var(--mute); stroke-width: 1.2; }
.g-mid { fill: none; stroke: var(--mute); stroke-width: 2; }
.g-maj { fill: none; stroke: var(--ink); stroke-width: 2.5; }
.g-maj-b { stroke-width: 3.5; }
.g-num { fill: var(--ink); font: 600 20px var(--cond); }
.g-num-s { font-size: 16px; }
.g-num-b { font-size: 30px; }
.g-big { fill: var(--ink); font: 600 36px var(--cond); }
.g-big-s { font-size: 26px; }
.g-cap { fill: var(--mute); font: 600 13px var(--cond); letter-spacing: .12em; }
.g-hub { fill: var(--panel); stroke: var(--mute); }
.g-pin { fill: var(--mute); }
.ndl { transform: rotate(var(--val)); transition: transform .3s cubic-bezier(.3, 1.5, .5, 1); }
.ndl path { fill: var(--amber); }

/* Drum counters */
.drumline {
  display: flex;
  align-items: center;
  gap: .14em;
  margin-block: auto;
  color: var(--ink);
  font: 600 clamp(2.1rem, 3.1vw, 3rem)/1.16 var(--cond);
  white-space: nowrap;
}
.drumline-big { color: var(--amber); font-size: clamp(2.4rem, 4.6vw, 4.2rem); }
.pre {
  margin-right: .3em;
  color: var(--mute);
  font: 500 .42em/1 var(--cond);
  letter-spacing: .1em;
  text-transform: uppercase;
}
.drums {
  display: inline-flex;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--bg);
}
.dr { display: block; width: .62em; height: 1.16em; overflow: hidden; border-right: 1px solid var(--line); }
.dr:last-child { border-right: 0; }
.dr-s {
  display: block;
  transform: translateY(calc(var(--d, 0) * -100% / 11));
  transition: transform .4s cubic-bezier(.2, .9, .3, 1);
}
.dr-s i { display: block; height: 1.16em; line-height: 1.16em; font-style: normal; text-align: center; }
.dr-sep { display: block; padding: 0 .05em; border-right: 1px solid var(--line); line-height: 1.16em; }
.drumline-slow .dr-s { transition-duration: 1.4s; }

/* Formats */
.rack-fmt { grid-auto-flow: dense; }

.fmts {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 80%);
  gap: var(--gap);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  padding-bottom: 8px;
}
.slot {
  display: flex;
  flex-direction: column;
  gap: 14px;
  scroll-snap-align: start;
  transition: border-color .2s;
}
.slot:hover { border-color: var(--mute); }
.mk { width: 100%; height: auto; max-height: 320px; margin-block: auto; }
.slot figcaption {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 10px;
  margin-top: auto;
}
.slot .plc { color: var(--ink); }
.ratio { color: var(--amber); font: 600 .875rem/1.25 var(--cond); letter-spacing: .06em; }
.fnote { grid-column: 1 / -1; color: var(--mute); font-size: .9063rem; line-height: 1.45; }

@media (min-width: 720px) {
  .fmts { display: contents; }
  .slot { grid-column: span 2; min-width: 0; }
  .slot-wide { grid-column: span 6; }
  .mk { max-height: none; }
}
@media (min-width: 1100px) {
  .slot-2 { grid-column: span 2; }
  .slot-3 { grid-column: span 3; }
  .slot-5, .slot-wide { grid-column: span 5; }
}

.fnote-mod { display: flex; flex-direction: column; justify-content: center; gap: 8px; }
.fnote-mod > p:last-child { color: var(--mute); font-size: .9688rem; line-height: 1.45; }
.big-fact { color: var(--amber); font: 800 clamp(2.4rem, 3.4vw, 3.2rem)/1 var(--sans); }

.x-f { fill: var(--bg); stroke: var(--line); }
.x-p { fill: var(--panel); }
.x-pp { fill: var(--panel); stroke: var(--ink); stroke-width: 1.5; }
.x-hd { fill: var(--bg); stroke: var(--ink); stroke-width: 1.5; }
.x-i { fill: none; stroke: var(--ink); stroke-width: 1.5; }
.x-m { fill: none; stroke: var(--mute); stroke-width: 1.1; }
.x-dash { stroke-dasharray: 3 6; }
.x-fi { fill: var(--ink); }
.x-fm { fill: var(--mute); }
.x-a { fill: var(--amber); }
.x-sa { fill: none; stroke: var(--amber); stroke-width: 2; }
.x-band { fill: var(--bg); stroke: var(--mute); }
.x-t { fill: var(--mute); font: 600 11.5px var(--cond); letter-spacing: .12em; }
.x-tl { fill: var(--ink); font: 600 11.5px var(--cond); letter-spacing: .06em; }
.x-ta { fill: var(--on-amber); font: 600 13px var(--cond); letter-spacing: .1em; }
.x-h { fill: var(--ink); font: 600 20px var(--cond); letter-spacing: .06em; }
.x-h2 { fill: var(--ink); font: 800 23px var(--sans); }

/* Factory */
.dplate { margin-top: 12px; }
.dplate > div {
  display: grid;
  grid-template-columns: 98px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}
.dplate dt {
  color: var(--mute);
  font: 600 .8125rem/1.25 var(--cond);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.dplate dd { display: grid; gap: 2px; }
.dplate b { font: 600 1.375rem/1.15 var(--cond); }
.dplate span { color: var(--mute); font-size: .9375rem; line-height: 1.4; }

.sub-h { margin-bottom: 16px; }

.seq { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.seq li { display: grid; gap: 10px; align-content: start; }
.seq-top { display: flex; align-items: center; gap: 10px; }
.seq p { color: var(--mute); font-size: .9688rem; line-height: 1.5; }

@media (min-width: 720px) {
  .seq { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1100px) {
  .seq { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 20px; }
  .seq li:not(:last-child) .seq-top::after {
    content: "";
    flex: 1;
    height: 1px;
    margin-right: -20px;
    background: var(--mute);
  }
}

/* Batch planner */
.pl {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas: "head" "gear" "read";
  gap: clamp(20px, 3vw, 44px);
}
.pl-head { grid-area: head; display: grid; gap: 10px; }
.pl-gear { grid-area: gear; min-width: 0; }
.pl-read { grid-area: read; display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.pl-title { font: 700 clamp(1.6rem, 2.7vw, 2.5rem)/1.1 var(--sans); }

@media (min-width: 900px) {
  .pl {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    grid-template-rows: auto 1fr;
    grid-template-areas: "gear head" "gear read";
  }
}

.dial {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin-inline: auto;
  container-type: inline-size;
}
.dial-svg { width: 100%; height: auto; }
.d-screw { fill: var(--bg); stroke: var(--line); }
.d-slot { fill: none; stroke: var(--line); stroke-width: 2; }
.d-base { fill: none; stroke: var(--line); stroke-width: 6; }
.d-arc {
  fill: none;
  stroke: var(--amber);
  stroke-width: 6;
  stroke-dasharray: var(--arc) 60;
  transition: stroke-dasharray .3s ease-out;
}
.d-name { fill: var(--mute); font: 600 18px var(--cond); letter-spacing: .34em; }

.dial-read {
  position: absolute;
  left: 50%;
  top: 71.5%;
  display: flex;
  align-items: center;
  gap: .16em;
  transform: translate(-50%, -50%);
  color: var(--ink);
  font: 600 40px/1.16 var(--cond);
  font-size: clamp(24px, 10cqw, 54px);
  white-space: nowrap;
}
.unit { color: var(--mute); font-size: max(11px, .4em); letter-spacing: .12em; text-transform: uppercase; }

.lever { width: 100%; max-width: 600px; margin: 16px auto 0; }
.lever label { display: block; color: var(--ink); margin-bottom: 2px; }
.lever input {
  -webkit-appearance: none;
  appearance: none;
  display: block;
  width: 100%;
  height: 48px;
  margin: 0;
  background: transparent;
  border-radius: var(--r);
  cursor: grab;
  touch-action: pan-y;
}
.lever input:active { cursor: grabbing; }
.lever input:focus-visible { outline-offset: 4px; }
.lever input::-webkit-slider-runnable-track {
  height: 12px;
  border-radius: var(--r);
  box-shadow: inset 0 0 0 1px var(--mute);
  background: linear-gradient(90deg, var(--amber) calc(14px + (100% - 28px) * var(--pos)), var(--bg) 0);
}
.lever input::-moz-range-track {
  height: 12px;
  border-radius: var(--r);
  box-shadow: inset 0 0 0 1px var(--mute);
  background: linear-gradient(90deg, var(--amber) calc(14px + (100% - 28px) * var(--pos)), var(--bg) 0);
}
.lever input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px;
  height: 44px;
  margin-top: -16px;
  border: 1px solid var(--on-amber);
  border-radius: var(--r);
  background: linear-gradient(90deg, transparent 44%, var(--on-amber) 44% 56%, transparent 56%), var(--amber);
  cursor: grab;
}
.lever input::-moz-range-thumb {
  box-sizing: border-box;
  width: 28px;
  height: 44px;
  border: 1px solid var(--on-amber);
  border-radius: var(--r);
  background: linear-gradient(90deg, transparent 44%, var(--on-amber) 44% 56%, transparent 56%), var(--amber);
  cursor: grab;
}
.lever-scale {
  position: relative;
  height: 28px;
  margin-inline: 14px;
  color: var(--mute);
  font: 500 .875rem/1 var(--cond);
}
.lever-scale span { position: absolute; top: 9px; transform: translateX(-50%); }
.lever-scale span::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -8px;
  width: 1px;
  height: 6px;
  background: var(--mute);
}

.pl-line { display: grid; gap: 6px; padding-top: 12px; border-top: 1px solid var(--line); }
.pl-ratios { font: 500 clamp(1.125rem, 1.5vw, 1.375rem)/1.25 var(--cond); letter-spacing: .04em; }
.pl-note { color: var(--mute); font-size: .9375rem; line-height: 1.5; }
#toBrief { align-self: flex-start; margin-top: auto; }

/* Flight plans */
.board { display: grid; gap: var(--gap); }
.strip { display: grid; gap: 14px; transition: border-color .2s; }
.strip:hover { border-color: var(--mute); }
.strip .push { justify-self: start; }

.way {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 0;
  font: 500 1rem/1.2 var(--cond);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.way li { display: flex; align-items: center; }
.way li::before {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin-right: 8px;
  border: 1.5px solid var(--mute);
  transform: rotate(45deg);
  transition: border-color .2s;
}
.way li:not(:last-child)::after {
  content: "";
  flex: none;
  width: clamp(14px, 2.4vw, 40px);
  height: 1px;
  margin-inline: 10px;
  background: var(--mute);
  transition: background-color .2s;
}
.strip:hover .way li::before { border-color: var(--amber); }
.strip:hover .way li::after { background-color: var(--amber); }
.steer { display: grid; gap: 6px; justify-items: start; }

@media (min-width: 1100px) {
  .strip {
    grid-template-columns: minmax(0, 3fr) minmax(0, 4fr) minmax(0, 2fr) auto;
    gap: 24px;
    align-items: center;
  }
}

/* Systems */
.sysm { display: flex; flex-direction: column; gap: 12px; }
.sysm > p:not(.plc) { color: var(--mute); max-width: 64ch; }

.reads > div {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  border-top: 1px solid var(--line);
}
.reads dt { color: var(--amber); font: 600 .9375rem/1.3 var(--cond); letter-spacing: .1em; text-transform: uppercase; }
.reads dd { color: var(--ink); font-size: .9688rem; line-height: 1.45; }

/* Signal path */
.path { display: grid; grid-template-columns: minmax(0, 1fr); }
.path li { position: relative; padding: 0 0 20px 32px; }
.path li:last-child { padding-bottom: 0; }
.path li::before, .path li::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: -8px;
  width: 2px;
}
.path li::before { background: var(--line); }
.path li::after { background: var(--amber); transform-origin: left top; }
.path li:last-child::before, .path li:last-child::after { display: none; }
.lamp {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  width: 16px;
  height: 16px;
  border: 2px solid var(--amber);
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 10px var(--amber-22);
}
.path h4 { margin-bottom: 4px; font: 600 1.0625rem/1.2 var(--cond); letter-spacing: .1em; text-transform: uppercase; }
.path p { color: var(--mute); font-size: .9688rem; line-height: 1.5; }

@media (min-width: 900px) {
  .path { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .path li, .path li:last-child { padding: 30px 22px 0 0; }
  .path li::before, .path li::after { left: 8px; right: -8px; top: 7px; bottom: auto; width: auto; height: 2px; }
}

/* Normal procedure */
.proc { display: flex; flex-direction: column; gap: 12px; }
.proc > .plc { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.proc > p:not(.plc) { color: var(--mute); max-width: 62ch; }
.proc h4 { font-size: clamp(1.1875rem, 1.6vw, 1.5rem); line-height: 1.2; }

.chk {
  display: grid;
  gap: 7px;
  margin-top: auto;
  padding-top: 6px;
  font: 500 .9375rem/1.25 var(--cond);
  letter-spacing: .05em;
  text-transform: uppercase;
}
.chk li { display: flex; align-items: baseline; gap: 8px; }
.chk li span { min-width: 0; }
.chk li::before {
  content: "";
  order: 1;
  flex: 1 1 16px;
  min-width: 16px;
  border-bottom: 2px dotted var(--mute);
}
.chk li b { order: 2; color: var(--amber); font-weight: 600; text-align: right; }

/* Toggles */
.tog { width: 28px; height: 44px; flex: none; }
.tog-plate { fill: var(--bg); stroke: var(--line); transition: stroke .15s; }
.tog-nut { fill: var(--panel); stroke: var(--mute); }
.tog-lever { fill: var(--mute); transform: scaleY(-1); transition: transform .2s cubic-bezier(.3, 1.4, .5, 1), fill .2s; }
.tog-pin { fill: var(--bg); }

.aux {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 270px), 1fr));
  gap: 22px 28px;
}
.aux > li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}
.aux p { margin-top: 4px; color: var(--mute); font-size: .9375rem; line-height: 1.5; }
.aux .tog-lever { fill: var(--amber); transform: none; transition-delay: calc(var(--i, 0) * 110ms); }

/* Crew */
.order { display: flex; flex-direction: column; gap: 10px; }
.order > p:not(.plc) { color: var(--mute); }

/* Comm and nav stacks */
.rack-ch { align-items: stretch; }
@media (min-width: 1100px) {
  .rack-ch { grid-template-rows: auto 1fr; }
  .rack-ch > .ch-intro { grid-column: 9 / -1; grid-row: 1; }
  .rack-ch > .radio { grid-column: 1 / 9; grid-row: 1 / 3; }
  .rack-ch > .ch-nav { grid-column: 9 / -1; grid-row: 2; }
}

.stack { margin-top: 12px; }
.stack li {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 3px 12px;
  align-items: center;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}
.com {
  grid-row: span 3;
  align-self: start;
  padding: 6px 4px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--bg);
  color: var(--amber);
  font: 600 .8125rem/1 var(--cond);
  letter-spacing: .08em;
  text-align: center;
  white-space: nowrap;
}
.stack b { font: 600 1.125rem/1.25 var(--sans); }
.kind { color: var(--mute); font: 600 .8125rem/1.25 var(--cond); letter-spacing: .1em; text-transform: uppercase; }
.what { color: var(--mute); font-size: .9688rem; line-height: 1.4; }

@media (min-width: 900px) {
  .radio .stack li { grid-template-columns: 66px minmax(0, 1.1fr) minmax(0, .9fr) minmax(0, 2fr); gap: 12px; }
  .radio .com { grid-row: auto; align-self: center; }
}
.stack-s li { grid-template-columns: 66px minmax(0, 1fr); }
.stack-s .com { grid-row: auto; align-self: center; }

/* Handbook */
.qrh details { border-top: 1px solid var(--line); }
.qrh details:first-child { border-top: 0; }
.qrh summary {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 12px 0;
  border-radius: var(--r);
  font: 600 clamp(1.0625rem, 1.3vw, 1.1875rem)/1.3 var(--sans);
  list-style: none;
  cursor: pointer;
}
.qrh summary::-webkit-details-marker { display: none; }
.qrh summary:hover { color: var(--amber); }
.qrh summary:hover .tog-plate { stroke: var(--mute); }
.qrh details[open] .tog-lever { fill: var(--amber); transform: none; }
.qrh details > p { max-width: 68ch; padding: 0 0 18px 44px; color: var(--mute); }

/* Briefing sheet */
.brief-side .chk { margin-top: 6px; max-width: 460px; }
.brief-side .jump { margin-top: 4px; }

.sheet { padding: clamp(20px, 2.6vw, 36px); }
.sheet-h { margin-bottom: 14px; }

.row { display: grid; gap: 6px; padding: 11px 0; border-top: 1px solid var(--line); }
.row label {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font: 600 .875rem/1.25 var(--cond);
  letter-spacing: .1em;
  text-transform: uppercase;
}
.row label::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border: 1px solid var(--mute);
  border-radius: 50%;
  background: var(--bg);
  transition: background-color .2s, border-color .2s, box-shadow .2s;
}
.row:has(input:valid:not(:placeholder-shown)) label::before,
.row:has(textarea:valid:not(:placeholder-shown)) label::before {
  border-color: var(--amber);
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber-22);
}
.row input, .row textarea {
  display: block;
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  border: 1px solid var(--mute);
  border-radius: var(--r);
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.4 var(--sans);
}
.row textarea { resize: vertical; }
.row input:focus, .row textarea:focus { outline: 2px solid var(--amber); outline-offset: 1px; border-color: var(--amber); }

@media (min-width: 720px) {
  .row { grid-template-columns: 150px minmax(0, 1fr); gap: 14px; align-items: center; }
  .row-top { align-items: start; }
  .row-top label { padding-top: 13px; }
}

.hp { position: absolute; left: -9999px; }

.sheet-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.sheet-note { flex: 1 1 240px; color: var(--mute); font-size: .9375rem; line-height: 1.45; }

.form-status {
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid var(--amber);
  border-radius: var(--r);
  background-color: var(--amber-12);
  color: var(--amber);
  font: 500 1.0625rem/1.3 var(--cond);
  letter-spacing: .02em;
}
.form-status:empty { display: none; }

.thanks { display: grid; gap: 14px; justify-items: start; padding-block: 8px; }
.thanks:focus { outline: none; }
.thanks h3 { font: 700 clamp(1.6rem, 2.7vw, 2.5rem)/1.1 var(--sans); }
.thanks p:last-child { max-width: 52ch; color: var(--mute); }

/* Footer */
.tail { padding-block: clamp(44px, 6vw, 84px) 16px; }
.tail-in { display: grid; gap: 18px; }
.tail-a { display: grid; gap: 8px; }
.tail-a p:last-child { max-width: 44ch; color: var(--mute); }
.tail-mark { font: 800 clamp(1.8rem, 3vw, 2.6rem)/1 var(--sans); letter-spacing: .1em; text-transform: uppercase; }
.tail-nav { display: flex; flex-wrap: wrap; align-content: start; gap: 6px; }
.tail-nav .sig { min-height: 40px; }
.tail-end {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--mute);
  font: 600 .8125rem/1.25 var(--cond);
  letter-spacing: .12em;
  text-transform: uppercase;
}

@media (min-width: 1100px) {
  .tail-in { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
  .tail-nav { justify-content: flex-end; }
  .tail-end { grid-column: 1 / -1; }
}

/* Phones: full-width controls, one line stays optional */
@media (max-width: 719.98px) {
  .push { white-space: normal; text-align: center; padding-block: 10px; }
  .lede-cta .push, #toBrief, .sheet-foot .push { width: 100%; }
  .qrh details > p { padding-left: 0; }
  .drumline { font-size: 2.1rem; }
  .drumline-big { font-size: clamp(2.2rem, 11vw, 3rem); }
}

/* Power-up sequence. All dark states live here, so without JS or with reduced motion nothing is hidden. */
@keyframes lamp {
  0%, 26% { color: var(--mute); border-color: var(--line); background-color: transparent; box-shadow: none; }
  12%, 42%, 100% { color: var(--amber); border-color: var(--amber); background-color: var(--amber-12); box-shadow: 0 0 12px var(--amber-22); }
}
@keyframes sweep {
  0% { transform: rotate(var(--lo)); }
  55% { transform: rotate(var(--hi)); }
  100% { transform: rotate(var(--val)); }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }

  html.js [data-live]:not(.live) .tab {
    border-color: var(--line);
    background-color: transparent;
    box-shadow: none;
    color: var(--mute);
  }
  html.js [data-live].live .tab { animation: lamp .8s calc(var(--i, 0) * 90ms) both; }

  html.js [data-live]:not(.live) .ndl { transform: rotate(var(--lo)); }
  html.js [data-live].live .ndl { animation: sweep 2s cubic-bezier(.45, .05, .25, 1) backwards; }

  html.js [data-live]:not(.live) .d-arc { stroke-dasharray: 0 60; }
  html.js [data-live]:not(.live) .fr { stroke: var(--line); }
  html.js [data-live]:not(.live) .dr-s { transform: translateY(0); }

  html.js [data-live] .path li::after { transition: transform .35s linear calc(var(--i, 0) * .3s + .15s); }
  html.js [data-live]:not(.live) .path li::after { transform: scale(0); }
  html.js [data-live] .lamp { transition: background-color .2s, border-color .2s, box-shadow .2s; transition-delay: calc(var(--i, 0) * .3s); }
  html.js [data-live]:not(.live) .lamp { border-color: var(--line); background-color: var(--bg); box-shadow: none; }

  html.js .aux[data-live]:not(.live) .tog-lever { fill: var(--mute); transform: scaleY(-1); }
}

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