/* MC-04 configurator — "hangar" layout: the aircraft owns the screen, choices dock below it. */
@font-face{font-family:Archivo;src:url(fonts/archivo-var.woff2) format('woff2');font-weight:100 900;font-stretch:62% 125%;font-display:swap}

:root{
  --ink:#121517;
  --ink-2:#394044;
  --muted:#697175;
  --line:#d9d9d3;
  --paper:#f6f6f2;
  --paper-2:#ebebe5;
  --sky:#dfe2e0;
  --night:#0e1113;
  --accent:#2a3034;
  --focus:#3f7ea6;
  --ease:cubic-bezier(.16,1,.3,1);
  --gutter:clamp(16px,3vw,44px);
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{height:100%}
html,body{overflow-x:clip}
body{margin:0;color:var(--ink);background:var(--paper);font:400 15px/1.5 Archivo,system-ui,sans-serif;font-stretch:100%;-webkit-font-smoothing:antialiased;font-variant-numeric:tabular-nums}
::selection{background:var(--ink);color:var(--paper)}
h1,h2,p,figure{margin:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;-webkit-tap-highlight-color:transparent}
button:disabled{opacity:.4;cursor:wait}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px}
[hidden]{display:none!important}
.sr-only,.skip{position:absolute;clip:rect(0 0 0 0);width:1px;height:1px;overflow:hidden}
.skip:focus{position:fixed;top:8px;left:8px;width:auto;height:auto;clip:auto;background:var(--paper);padding:12px 16px;z-index:50}
.icon{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* Header floats over the scene */
.header{position:fixed;inset:0 0 auto;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:20px var(--gutter);pointer-events:none}
.header>*{pointer-events:auto}
.brand img{display:block;width:92px;height:auto;filter:brightness(0) saturate(0) opacity(.85)}
.back{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;padding:10px 14px;margin-right:-14px;border-radius:999px;transition:background .25s var(--ease)}
.back:hover{background:rgb(255 255 255 / .45)}

/* Layout */
.configurator{display:grid;grid-template-rows:minmax(0,1fr) auto;height:100svh;min-height:620px}
.visual{position:relative;background:var(--sky);overflow:hidden;isolation:isolate;min-height:0}
/* Soft daylight wash behind the title so it reads over the airfield trees. */
.visual:before{content:'';position:absolute;inset:0 0 auto;height:42%;z-index:2;pointer-events:none;background:linear-gradient(rgb(238 241 243 / .72),rgb(238 241 243 / .38) 55%,transparent)}
.visual:has(.reference-stage:not([hidden])):before{display:none}

.model-heading{position:absolute;z-index:3;left:var(--gutter);top:92px;pointer-events:none}
h1{font-weight:640;font-stretch:125%;font-size:clamp(56px,8.4vw,128px);line-height:.86;letter-spacing:-.035em;color:var(--ink)}
.model-meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:16px;font-size:13px;font-weight:500;color:var(--ink-2)}
.model-meta span+span:before{content:'';display:inline-block;width:4px;height:4px;border-radius:50%;background:currentColor;opacity:.45;vertical-align:middle;margin:-2px 18px 0 0}
.study-label{color:var(--muted)}

.viewer{position:absolute;inset:0}
.viewer canvas{width:100%;height:100%;display:block;touch-action:none;opacity:0;transition:opacity .9s var(--ease)}
.viewer.ready canvas{opacity:1}
.poster{position:absolute;inset:18% 12% 14%;width:76%;height:68%;object-fit:contain;opacity:.25;pointer-events:none;transition:opacity .5s}
.viewer.ready .poster{opacity:0}
.loading{position:absolute;left:50%;top:58%;transform:translate(-50%,-50%);display:grid;justify-items:center;gap:14px;font-size:13px;color:var(--ink-2)}
.loading-line{width:140px;height:2px;background:rgb(15 34 48 / .15);position:relative;overflow:hidden;border-radius:2px}
.loading-line:after{content:'';position:absolute;inset:0;background:var(--ink);transform:translateX(-100%);animation:load 1.4s var(--ease) infinite}
@keyframes load{to{transform:translateX(100%)}}
.viewer-error{position:absolute;inset:auto var(--gutter) 30%;text-align:center;display:grid;gap:12px;justify-items:center}
.viewer-error button{text-decoration:underline;text-underline-offset:4px}
.render-unavailable #aircraft-canvas,.render-unavailable .loading{display:none}
.render-unavailable .poster{opacity:.85}

.reference-stage{position:absolute;inset:0;background:var(--night);display:grid;place-items:center}

#reference-image{display:none}
.gallery{position:absolute;inset:0;touch-action:pan-y}
.gallery-hero{position:absolute;top:20px;right:var(--gutter);bottom:20px;left:clamp(360px,36%,620px);width:calc(100% - clamp(360px,36%,620px) - var(--gutter));height:calc(100% - 40px);max-width:none;object-fit:contain;object-position:center;border-radius:14px;opacity:0;transform:scale(1.015);transition:opacity .6s var(--ease),transform .9s var(--ease)}
.gallery-hero.is-in{opacity:1;transform:none}
.gallery-caption{position:absolute;left:var(--gutter);top:262px;font-size:13px;font-weight:500;color:rgb(255 255 255 / .72)}
.gallery-thumbs{position:absolute;left:var(--gutter);top:292px;bottom:20px;width:calc(clamp(360px,36%,620px) - var(--gutter) - 28px);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-auto-rows:max-content;gap:8px;align-content:start;overflow:auto;scrollbar-width:none}
.gallery-thumbs button{padding:0;border-radius:8px;overflow:hidden;aspect-ratio:3/2;outline:2px solid transparent;outline-offset:2px;opacity:.55;transition:opacity .3s,outline-color .3s}
.gallery-thumbs button:hover{opacity:.9}
.gallery-thumbs button[aria-pressed=true]{opacity:1;outline-color:#fff}
.gallery-nav{position:absolute;bottom:36px;z-index:2;width:44px;height:44px;display:grid;place-items:center;border-radius:50%;background:rgb(15 34 48 / .55);color:#fff;backdrop-filter:blur(8px);transition:background .25s,transform .35s var(--ease)}
.gallery-nav:hover{background:rgb(15 34 48 / .8)}
.gallery-nav .icon{width:20px;height:20px}
.gallery-prev{left:calc((clamp(360px,36%,620px) + 100% - var(--gutter)) / 2 - 48px)}
.gallery-next{left:calc((clamp(360px,36%,620px) + 100% - var(--gutter)) / 2 + 4px)}
.gallery-prev:hover{transform:translateX(-2px)}
.gallery-next:hover{transform:translateX(2px)}
.gallery-thumbs img{display:block;width:100%;height:100%;object-fit:cover}
@media(max-width:900px){
  .gallery-hero{top:140px;left:16px;right:16px;bottom:72px;width:calc(100% - 32px);height:calc(100% - 212px);border-radius:12px}
  .gallery-caption{display:none}
  .gallery-thumbs{top:auto;bottom:12px;left:16px;right:16px;width:auto;display:flex;gap:8px;overflow-x:auto}
  .gallery-thumbs button{flex:none;width:60px}
  .gallery-nav{bottom:auto;top:calc(140px + (100% - 212px) / 2 - 19px);width:38px;height:38px}
  .gallery-prev{left:26px}
  .gallery-next{left:auto;right:26px}
}
@keyframes reveal{from{opacity:0;transform:scale(1.04)}}
.visual:has(.reference-stage:not([hidden])) .model-heading{color:#fff}
.visual:has(.reference-stage:not([hidden])) h1,.visual:has(.reference-stage:not([hidden])) .model-meta,.visual:has(.reference-stage:not([hidden])) .study-label{color:#fff;text-shadow:0 2px 24px rgb(0 0 0 / .45)}
body:has(.reference-stage:not([hidden])) .header{color:#fff}
body:has(.reference-stage:not([hidden])) .brand img{filter:brightness(0) invert(1)}
body:has(.reference-stage:not([hidden])) .back:hover{background:rgb(255 255 255 / .14)}

/* Scene controls: one instrument strip, bottom of the stage */
.viewer-bottom{position:absolute;z-index:3;left:var(--gutter);bottom:20px;display:flex;align-items:center;gap:16px;pointer-events:none}
.gesture{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);transition:opacity .4s}
.gesture.is-used{opacity:0}
.view-tools{display:flex;pointer-events:auto;order:-1;background:rgb(238 241 243 / .84);border-radius:999px;padding:3px;box-shadow:0 6px 20px -8px rgb(15 34 48 / .35)}
.view-tools button{width:38px;height:38px;display:grid;place-items:center;border-radius:50%;transition:background .2s}
.view-tools button:hover{background:rgb(15 34 48 / .08)}
.camera-nav{position:absolute;z-index:3;right:var(--gutter);bottom:20px;display:flex;background:rgb(238 241 243 / .92);border:1px solid rgb(15 34 48 / .18);border-radius:12px;padding:3px;backdrop-filter:blur(6px)}
.camera-nav button{position:relative;min-height:36px;padding:0 14px;border-radius:9px;font-size:13px;font-weight:500;color:var(--ink-2);transition:background .25s var(--ease),color .25s}
.camera-nav button+button:before{content:'';position:absolute;left:0;top:10px;bottom:10px;width:1px;background:rgb(15 34 48 / .16)}
.camera-nav button[aria-pressed=true]:before,.camera-nav button[aria-pressed=true]+button:before{opacity:0}
.camera-nav button:hover:not([aria-pressed=true]){background:rgb(15 34 48 / .07)}
.camera-nav button[aria-pressed=true]{background:var(--ink);color:var(--paper)}

/* Dock */
.choices{position:relative;background:var(--paper);display:grid;grid-template-columns:minmax(150px,200px) minmax(0,1fr);grid-template-rows:1fr auto;column-gap:clamp(24px,4vw,64px);padding:24px var(--gutter) 16px;border-top:1px solid var(--line)}
.choice-tabs{grid-row:1/3;display:flex;flex-direction:column;gap:2px;counter-reset:step}
.choice-tabs button{position:relative;counter-increment:step;text-align:left;padding:8px 0 8px 34px;font-size:15px;font-weight:500;color:var(--muted);transition:color .25s}
.choice-tabs button:before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:50%;transform:translateY(-50%);font-size:11px;font-weight:500;opacity:.6}
.choice-tabs button:after{content:'';position:absolute;left:0;top:4px;bottom:4px;width:2px;background:var(--ink);transform:scaleY(0);transform-origin:top;transition:transform .4s var(--ease)}
.choice-tabs button:after{left:-12px}
.choice-tabs button:hover{color:var(--ink)}
.choice-tabs button[aria-selected=true]{color:var(--ink);font-weight:600}
.choice-tabs button[aria-selected=true]:before{opacity:1;color:var(--accent)}
.choice-tabs button[aria-selected=true]:after{transform:none}

.step{display:grid;grid-template-columns:minmax(200px,280px) minmax(0,1fr) auto;align-items:end;gap:clamp(20px,3vw,48px);animation:step .5s var(--ease)}
@keyframes step{from{opacity:0;transform:translateY(6px)}}
.choice-heading{align-self:start}
h2{font-weight:600;font-stretch:112%;font-size:clamp(24px,2.1vw,32px);line-height:1.08;letter-spacing:-.02em;text-wrap:balance}
.choice-intro{margin-top:10px;font-size:14px;color:var(--muted);line-height:1.5;max-width:34ch;text-wrap:pretty}

.options{display:flex;gap:14px;margin:0;padding:0;border:0;min-width:0}
.option{position:relative;flex:0 1 180px;min-width:0;display:grid;grid-template-columns:1fr auto;gap:10px 8px;cursor:pointer}
.option input{position:absolute;opacity:0;pointer-events:none}
.option-media{grid-column:1/-1;display:block;width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:12px;background:var(--paper-2);outline:1.5px solid transparent;outline-offset:3px;transition:outline-color .25s,transform .45s var(--ease),filter .3s}
.option:hover .option-media{transform:translateY(-2px)}
.option:has(input:checked) .option-media{outline-color:var(--ink)}
.option:has(input:focus-visible) .option-media{outline:2px solid var(--focus)}
.option-text{display:grid;gap:1px;line-height:1.3}
.option-text strong{font-size:14px;font-weight:600}
.option-text small{font-size:12.5px;color:var(--muted)}
.option-check{position:absolute;top:0;right:0;width:24px;height:24px;padding:5px;border-radius:50%;top:8px;right:8px;background:var(--ink);color:var(--paper);stroke-width:2.6;opacity:0;transform:scale(.6);transition:opacity .25s,transform .35s var(--ease)}
.option:has(input:checked) .option-check{opacity:1;transform:none}

/* Livery sample: white fuselage with the paint swept through, like the aircraft's own cheatline */
.paint-sample{position:relative;overflow:hidden;background:linear-gradient(180deg,#fbfbf8,#e9ebe7)}
.paint-sample:before{content:'';position:absolute;inset:0;background:var(--paint);clip-path:polygon(0 0,100% 0,100% 30%,0 74%)}
.paint-sample:after{content:'';position:absolute;inset:0;background:var(--paint);clip-path:polygon(0 84%,100% 40%,100% 46%,0 90%)}

.primary,.secondary{display:inline-flex;align-items:center;justify-content:space-between;gap:20px;min-height:52px;padding:0 20px 0 24px;border-radius:14px;font-size:15px;font-weight:600;white-space:nowrap;transition:background .25s,transform .35s var(--ease)}
.primary{position:relative;background:var(--ink);color:var(--paper);min-width:220px;padding:0 0 0 20px;font-size:16px}
.primary[data-next]{min-height:60px;padding-top:12px}
.primary[data-next] .icon{padding-block:21px;margin-top:-12px}
.primary[data-next]:before{content:'Etapa ' attr(data-next);position:absolute;left:20px;top:10px;font-size:11.5px;font-weight:400;color:rgb(246 246 242 / .62)}
.primary .icon{box-sizing:content-box;width:18px;height:18px;padding:17px 18px;border-left:1px solid rgb(246 246 242 / .2)}
.primary:hover{background:var(--accent)}
.primary:hover .icon{transform:translateX(4px)}
.primary .icon{transition:transform .35s var(--ease)}
.secondary{border:1.5px solid var(--ink);justify-content:center}
.secondary:hover{background:var(--paper-2)}
.text-button{font-size:14px;font-weight:500;text-decoration:underline;text-underline-offset:4px;padding:10px 4px}
.text-button:hover{color:var(--accent)}

.configuration-summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:0;border-top:1px solid var(--line)}
.configuration-summary>div{padding:12px 16px 0 0}
dt{font-size:12.5px;color:var(--muted)}
dd{margin:2px 0 0;font-size:16px;font-weight:600}
.summary-actions{display:flex;flex-direction:column;align-items:stretch;gap:8px}

.study-note{grid-column:2;margin-top:18px;font-size:12px;color:var(--muted)}
.action-status{position:absolute;right:var(--gutter);bottom:18px;font-size:12.5px;font-weight:500;color:var(--accent)}
.copy-fallback{position:fixed;left:-9999px}
.noscript{padding:20px;text-align:center}

@media(max-width:1100px) and (min-width:761px){
  .step{grid-template-columns:minmax(0,1fr) auto;align-items:end}
  .choice-heading{grid-column:1/-1}
  .choice-intro{max-width:60ch}
  .configuration-summary{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media(max-width:760px){
  .header{position:absolute;padding:14px 16px}
  .brand img{width:78px}
  .back{font-size:12.5px;padding:8px 12px;margin-right:-12px}
  .configurator{display:block;height:auto;min-height:0}
  .visual{height:58svh;min-height:400px}
  .model-heading{left:16px;top:70px}
  h1{font-size:56px}
  .model-meta{font-size:12px;gap:4px 12px;margin-top:10px}
  .model-meta span+span:before{margin-right:12px}
  .viewer-bottom{left:16px;bottom:14px;gap:0}
  .gesture,.view-tools{display:none}
  .camera-nav{right:16px;bottom:14px}
  .camera-nav button{padding:0 10px;font-size:12.5px;min-height:34px}
  .view-tools button{width:36px;height:36px}
  .choices{display:block;padding:0 16px 28px}
  .choice-tabs{position:sticky;top:0;z-index:5;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:0 0 22px;padding:0;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:-16px 0 0 var(--paper),16px 0 0 var(--paper)}
  .choice-tabs button{padding:12px 0 12px;font-size:14px;display:grid;gap:1px}
  .choice-tabs button:before{position:static;transform:none;font-size:10px}
  .choice-tabs button:after{left:0;right:6px;top:auto;bottom:-1px;width:auto;height:2px;transform:scaleX(0);transform-origin:left}
  .choice-tabs button[aria-selected=true]:after{transform:none}
  .step{display:flex;flex-direction:column;align-items:stretch;gap:20px}
  .options{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .primary{width:100%}
  .configuration-summary{grid-template-columns:1fr 1fr;row-gap:6px}
  .study-note{margin-top:22px}
  .action-status{position:static;margin-top:8px}
}

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