/* Captain Mike Lowe · Down below: the engine room of the MV Royal Iris */
#engine .cinema--engine { background: transparent; }
#engine .cinema--engine::after { background: linear-gradient(180deg, rgba(11,20,30,0) 20%, rgba(11,20,30,.62) 100%); }

#engine .eng__scrolly { position: relative; margin-top: 8vh; display: grid; grid-template-columns: minmax(0, 1fr); }
#engine .eng__stage { position: sticky; top: calc(env(safe-area-inset-top, 0px) + var(--hud-h) + 8px); height: min(66vh, 640px); z-index: 0; padding: 0 var(--gutter-r) 0 var(--gutter-l); }
#engine .eng__view {
  --plate: 0;
  position: relative; height: 100%; margin: 0; overflow: hidden; isolation: isolate;
  border: 1px solid rgba(230, 201, 127, .28);
  box-shadow: 0 22px 54px rgba(4, 10, 16, .5), inset 0 0 0 1px rgba(0,0,0,.4);
  background:
    radial-gradient(120% 90% at 52% 38%, #24384a 0%, #172736 46%, #0d1822 100%);
  color: #dfe8e4;
}
/* engine-room grid and vignette, then a paper plate that fades in for the exploded view */
#engine .eng__view::before, #engine .eng__view::after { content: ""; position: absolute; inset: 0; pointer-events: none; }
#engine .eng__view::before {
  z-index: 0;
  background:
    linear-gradient(rgba(141,255,188,.045) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, rgba(141,255,188,.045) 1px, transparent 1px) 0 0 / 32px 32px,
    radial-gradient(80% 70% at 50% 45%, transparent 55%, rgba(0,0,0,.42) 100%);
}
#engine .eng__view::after {
  z-index: 0; opacity: var(--plate);
  background:
    linear-gradient(rgba(27,93,87,.09) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, rgba(27,93,87,.09) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(rgba(27,93,87,.12) 1px, transparent 1px) 0 0 / 120px 120px,
    linear-gradient(90deg, rgba(27,93,87,.12) 1px, transparent 1px) 0 0 / 120px 120px,
    #efeee6;
}
#engine canvas { position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; touch-action: pan-y; cursor: grab; }
#engine canvas:active { cursor: grabbing; }
#engine .eng__leaders { position: absolute; inset: 0; z-index: 2; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
#engine .eng__leaders line { stroke: rgba(141,255,188,.75); stroke-width: 1; opacity: 0; }
#engine .eng__leaders circle { fill: #0d1822; stroke: var(--phosphor); stroke-width: 1.4; opacity: 0; }
#engine .eng__view.is-paper .eng__leaders line { stroke: var(--ink); }
#engine .eng__view.is-paper .eng__leaders circle { fill: var(--paper); stroke: var(--ink); }
#engine .eng__tags { position: absolute; inset: 0; z-index: 3; pointer-events: none; }
#engine .eng__tag, #engine .eng__call { position: absolute; left: 0; top: 0; opacity: 0; white-space: nowrap; will-change: transform, opacity; }
#engine .eng__tag { padding: 3px 7px 2px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--phosphor); background: rgba(9,17,25,.78); border: 1px solid rgba(141,255,188,.45); }
#engine .eng__call { display: flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; color: var(--ink); }
#engine .eng__call.is-left { flex-direction: row-reverse; }
#engine .eng__call i { display: grid; place-items: center; min-width: 20px; height: 20px; padding: 0 4px; border-radius: 10px; background: var(--ink); color: var(--paper); font-style: normal; font-weight: 600; font-size: 10.5px; }
#engine .eng__call span { padding: 1px 5px; background: rgba(239,238,230,.86); }

/* HUD */
#engine .eng__hud { position: absolute; inset: 0; z-index: 4; pointer-events: none; font-family: var(--font-mono); transition: opacity .4s; }
#engine .eng__title { position: absolute; left: 14px; top: 12px; display: grid; gap: 2px; padding-left: 10px; border-left: 2px solid var(--brass); }
#engine .eng__title b { font-family: var(--font-display); font-weight: 900; font-size: 22px; line-height: 1; letter-spacing: .06em; text-transform: uppercase; color: var(--paper); }
#engine .eng__title span { font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: rgba(223,232,228,.72); }
#engine .eng__title #engPhase { color: var(--phosphor); }
#engine .eng__gens { position: absolute; left: 14px; bottom: 74px; display: grid; gap: 5px; width: 230px; padding: 10px 12px; background: rgba(9,17,25,.72); border: 1px solid rgba(141,255,188,.22); transition: opacity .4s; }
#engine .eng__gens p { margin: 0; display: grid; grid-template-columns: 74px 1fr; grid-template-rows: auto auto; column-gap: 8px; align-items: center; }
#engine .eng__gens span { font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: rgba(223,232,228,.8); }
#engine .eng__gens i { display: block; height: 6px; background: linear-gradient(90deg, #3fae7a, var(--phosphor)); transform-origin: 0 50%; transform: scaleX(.3); box-shadow: 0 0 8px rgba(141,255,188,.35); }
#engine .eng__gens [data-mot] i { background: linear-gradient(90deg, #a77d2c, var(--brass-hi)); box-shadow: 0 0 8px rgba(230,201,127,.3); }
#engine .eng__gens small { grid-column: 2; font-size: 9.5px; letter-spacing: .08em; color: rgba(223,232,228,.5); }
#engine .eng__gens p + p[data-mot="p"] { margin-top: 6px; padding-top: 6px; border-top: 1px solid rgba(141,255,188,.18); }
#engine .eng__pitch { position: absolute; right: 14px; top: 12px; width: 150px; padding: 8px 10px 8px; background: rgba(9,17,25,.72); border: 1px solid rgba(230,201,127,.3); }
#engine .eng__pitch svg { width: 100%; height: auto; display: block; overflow: visible; }
#engine .eng__arc { fill: none; stroke: rgba(223,232,228,.35); stroke-width: 6; }
#engine .eng__arc--ast { stroke: rgba(196,58,44,.55); }
#engine .eng__ticks { stroke: rgba(223,232,228,.7); stroke-width: 1.4; }
#engine .eng__pitch text { font-size: 8.5px; letter-spacing: .1em; text-transform: uppercase; fill: rgba(223,232,228,.75); }
#engine #engPitchNeedle { transition: transform .1s linear; }
#engine #engPitchNeedle path { fill: var(--brass-hi); }
#engine #engPitchNeedle circle { fill: var(--brass); stroke: #3a2c12; stroke-width: 1.2; }
#engine .eng__pitch p { margin: 2px 0 0; display: grid; gap: 1px; text-align: center; }
#engine .eng__pitch p span { font-size: 9.5px; letter-spacing: .14em; text-transform: uppercase; color: rgba(223,232,228,.6); }
#engine .eng__pitch p b { font-family: var(--font-display); font-weight: 800; font-size: 19px; line-height: 1.05; letter-spacing: .06em; text-transform: uppercase; color: var(--brass-hi); }
#engine .eng__note { position: absolute; right: 14px; bottom: 74px; z-index: 4; margin: 0; font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .12em; text-transform: uppercase; color: rgba(223,232,228,.5); pointer-events: none; }
#engine .eng__view.is-paper .eng__note { color: rgba(15,26,34,.55); }
#engine .eng__view.is-paper .eng__title b { color: var(--ink); }
#engine .eng__view.is-paper .eng__title span { color: var(--muted); }
#engine .eng__view.is-paper .eng__title #engPhase { color: var(--teal-deep); }
#engine[data-phase="exploded"] .eng__gens, #engine[data-phase="exploded"] .eng__pitch, #engine[data-phase="exploded"] .eng__tg { opacity: 0; pointer-events: none; }
#engine[data-phase="cut"] .eng__gens { opacity: 0; }

/* engine orders, styled after the page's telegraph */
#engine .eng__tg { position: absolute; z-index: 5; left: 50%; bottom: 12px; transform: translateX(-50%); display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 3px; width: min(560px, calc(100% - 24px)); padding: 4px; background: rgba(9,17,25,.82); border: 1px solid rgba(230,201,127,.32); transition: opacity .4s; }
#engine .eng__tg button { min-height: 44px; padding: 3px 2px; border: 1px solid rgba(242,244,239,.22); background: #172532; color: var(--paper); cursor: pointer; font-family: var(--font-mono); font-size: 10.5px; line-height: 1.12; letter-spacing: .05em; text-transform: uppercase; }
#engine .eng__tg button:hover { border-color: var(--brass-hi); }
#engine .eng__tg button.o-astern { color: #ffaa9e; }
#engine .eng__tg button.o-stop { color: var(--brass-hi); }
#engine .eng__tg button.is-on { background: var(--brass); color: var(--ink); border-color: var(--brass); }
#engine .eng__fallback { position: absolute; inset: auto 16px 50% 16px; z-index: 6; margin: 0; padding: 14px 16px; background: var(--paper); color: var(--ink); font-size: var(--step-0); }
#engine.eng--nogl .eng__hud, #engine.eng--nogl .eng__tg, #engine.eng--nogl .eng__note, #engine.eng--nogl canvas { display: none; }

/* steps */
#engine .eng__steps { position: relative; z-index: 1; padding-bottom: 12vh; }
#engine .eng__step { min-height: 92vh; display: grid; align-items: end; padding: 0 var(--gutter-r) 0 max(var(--gutter-l), 7vw); pointer-events: none; }
#engine .eng__step > p, #engine .eng__keycard { pointer-events: auto; margin: 0; width: min(520px, 100%); background: var(--paper); padding: 18px 20px; box-shadow: 0 14px 34px rgba(6,14,20,.35); font-size: var(--step-0); }
#engine .eng__step b { font-family: var(--font-mono); font-size: .8em; letter-spacing: .06em; color: var(--teal-deep); }
#engine .eng__step.is-on > p, #engine .eng__step.is-on .eng__keycard { outline: 2px solid var(--brass); }
#engine .eng__keycard p { margin: 0; }
#engine .eng__key { margin: 12px 0 12px; padding: 0 0 0 26px; columns: 2 168px; column-gap: 22px; font-family: var(--font-mono); font-size: 11.5px; line-height: 1.5; letter-spacing: .02em; }
#engine .eng__key li { break-inside: avoid; }
#engine .eng__key li::marker { font-weight: 600; color: var(--teal-deep); }
#engine .eng__src { font-family: var(--font-mono); font-size: 10.5px; line-height: 1.5; color: var(--muted); }

@media (min-width: 900px) {
  #engine .eng__scrolly { grid-template-columns: minmax(300px, .62fr) minmax(0, 1.7fr); align-items: start; }
  #engine .eng__stage { grid-column: 2; grid-row: 1; height: calc(100vh - var(--hud-h) - 34px); max-height: 780px; padding-left: 0; }
  #engine .eng__steps { grid-column: 1; grid-row: 1; padding-top: 18vh; }
  #engine .eng__step { min-height: 88vh; align-items: center; padding-right: 24px; }
  #engine .eng__step--key { min-height: 120vh; }
}
@media (max-width: 899px) {
  #engine .eng__gens, #engine .eng__note { display: none; }
  #engine .eng__steps { margin-top: 4vh; }
}
@media (max-width: 560px) {
  #engine .eng__stage { height: 64vh; padding: 0 8px; }
  #engine .eng__title b { font-size: 18px; }
  #engine .eng__title span:not(#engPhase) { display: none; }
  #engine .eng__pitch { width: 104px; padding: 5px 6px 6px; }
  #engine .eng__pitch text { display: none; }
  #engine .eng__pitch p b { font-size: 14px; }
  #engine .eng__pitch p span { font-size: 8.5px; }
  #engine .eng__tg { bottom: 6px; width: calc(100% - 12px); gap: 2px; padding: 3px; }
  #engine .eng__tg button { min-height: 40px; font-size: 9px; letter-spacing: .02em; }
  #engine .eng__tag { font-size: 9.5px; padding: 2px 5px 1px; }
  #engine .eng__call span { display: none; }
  #engine .eng__key { columns: 1; }
}
@media (prefers-reduced-motion: reduce) {
  #engine .eng__hud, #engine .eng__tg, #engine .eng__gens { transition: none; }
}

/* parts: tap a number on the drawing, or step through them on the card */
#engine .eng__call { pointer-events: none; cursor: pointer; transition: opacity .2s; }
#engine .eng__call i { transition: transform .2s, background-color .2s; }
#engine .eng__call:hover i { background: var(--teal-deep); }
#engine .eng__call.is-sel { z-index: 2; }
#engine .eng__call.is-sel i { background: var(--brass); color: var(--ink); transform: scale(1.25); box-shadow: 0 0 0 3px rgba(230,201,127,.35); }
#engine .eng__call.is-sel span { display: inline-block !important; background: var(--ink); color: var(--paper); }
#engine .eng__picker { display: grid; grid-template-columns: 44px minmax(0, 1fr) 44px; align-items: center; gap: 8px; margin: 12px 0 10px; }
#engine .eng__pk { height: 44px; border-radius: 50%; border: 1px solid var(--ink); background: transparent; color: var(--ink); font-size: 24px; line-height: 1; cursor: pointer; }
#engine .eng__pk:hover { background: var(--ink); color: var(--paper); }
#engine .eng__pknow { margin: 0; display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 4px 12px; background: var(--ink); color: var(--paper); font-family: var(--font-mono); font-size: 13px; letter-spacing: .03em; }
#engine .eng__pknow i { display: grid; place-items: center; min-width: 28px; height: 28px; padding: 0 6px; border-radius: 14px; background: var(--brass); color: var(--ink); font-style: normal; font-weight: 600; flex: none; }
#engine .eng__all { margin: 0 0 10px; font-family: var(--font-mono); font-size: 11.5px; }
#engine .eng__all summary { cursor: pointer; color: var(--teal-deep); letter-spacing: .06em; text-transform: uppercase; font-size: 11px; padding: 4px 0; }
#engine .eng__all .eng__key { margin: 8px 0 4px; }
#engine .eng__key li { cursor: pointer; }
#engine .eng__key li.is-sel { color: var(--teal-deep); font-weight: 600; }