/* ==========================================================================
   RAIL55 — Design Tokens
   ========================================================================== */
:root{
  /* Color */
  --ink:        #0b0e13;   /* primary dark ground */
  --ink-soft:   #12161f;   /* elevated dark panel */
  --blueprint:  #123a73;   /* technical blue ground */
  --blueprint-2:#1b4f96;   /* lighter blueprint blue */
  --line:       #dce6f7;   /* blueprint linework */
  --sand:       #c69a5b;   /* micro-scale / desert warmth accent */
  --sand-soft:  #e8d3ac;
  --steel:      #8a97a6;   /* macro-scale / engineering accent */
  --steel-soft: #b7c0ca;
  --paper:      #f3efe6;   /* warm paper ground */
  --paper-ink:  #1a1912;
  --white:      #ffffff;
  --line-hair:  rgba(255,255,255,0.14);
  --line-hair-dark: rgba(15,18,15,0.12);

  /* Type */
  --f-display: 'Bodoni Moda', 'Iowan Old Style', 'Times New Roman', serif;
  --f-body:    'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --f-mono:    'IBM Plex Mono', 'SF Mono', Consolas, monospace;
  --f-display-ar: 'Cairo', 'Segoe UI', sans-serif;
  --f-body-ar:    'Cairo', 'Segoe UI', sans-serif;
  --f-mono-ar:    'Cairo', 'Segoe UI', sans-serif;

  --step--1: clamp(0.8rem, 0.78rem + 0.1vw, 0.88rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --step-1:  clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --step-2:  clamp(1.6rem, 1.4rem + 1vw, 2.1rem);
  --step-3:  clamp(2.1rem, 1.7rem + 2vw, 3.2rem);
  --step-4:  clamp(2.8rem, 2.1rem + 3.5vw, 5rem);
  --step-5:  clamp(3.6rem, 2.4rem + 6vw, 7.2rem);

  --gap: 1.5rem;
  --container: 1320px;
  --ease: cubic-bezier(.16,.8,.24,1);
}

/* ==========================================================================
   Reset
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;}
img,svg,video{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;margin:0;padding:0;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
h1,h2,h3,h4,p,figure{margin:0;}
input{font:inherit;}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important;}
}

body{
  font-family:var(--f-body);
  background:var(--paper);
  color:var(--paper-ink);
  font-size:var(--step-0);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

:focus-visible{
  outline:2px solid var(--sand);
  outline-offset:3px;
}

.container{
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding-inline:clamp(1.25rem, 4vw, 3rem);
}

.eyebrow{
  font-family:var(--f-mono);
  font-size:var(--step--1);
  letter-spacing:0.16em;
  text-transform:uppercase;
  display:flex;
  align-items:center;
  gap:0.75rem;
  opacity:0.72;
}
.eyebrow::before{
  content:"";
  width:28px;height:1px;
  background:currentColor;
  display:inline-block;
}

h1,h2,h3{
  font-family:var(--f-display);
  font-weight:600;
  line-height:1.05;
  letter-spacing:-0.01em;
}
h2{font-size:var(--step-3);}
h3{font-size:var(--step-2);}
.lede{
  font-size:var(--step-1);
  line-height:1.5;
  max-width:46ch;
  font-weight:400;
}
.on-dark{color:var(--white);}
.copy{max-width:62ch;}
.copy p + p{margin-top:1.1em;}

.btn{
  display:inline-flex;
  align-items:center;
  gap:0.6rem;
  font-family:var(--f-mono);
  font-size:var(--step--1);
  letter-spacing:0.08em;
  text-transform:uppercase;
  padding:0.95rem 1.6rem;
  border:1px solid currentColor;
  transition:background 0.3s var(--ease), color 0.3s var(--ease);
}
.btn::after{content:"→";transition:transform 0.3s var(--ease);}
.btn:hover::after{transform:translateX(4px);}
.btn-solid{background:var(--white);color:var(--ink);border-color:var(--white);}
.btn-solid:hover{background:var(--sand);border-color:var(--sand);color:var(--ink);}
.btn-line{color:var(--white);}
.btn-line:hover{background:rgba(255,255,255,0.1);}
.btn-dark{color:var(--ink);}
.btn-dark:hover{background:var(--ink);color:var(--white);}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header{
  position:fixed;top:0;left:0;right:0;
  z-index:100;
  padding:1.4rem 0;
  transition:background 0.4s var(--ease), padding 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(11,14,19,0.86);
  backdrop-filter:blur(10px);
  padding:0.9rem 0;
  border-color:var(--line-hair);
}
.site-header .container{
  display:flex;align-items:center;justify-content:space-between;
}
.brand{
  font-family:var(--f-display);
  font-size:1.3rem;
  letter-spacing:0.03em;
  color:var(--white);
  display:flex;align-items:baseline;gap:0.5rem;
}
.brand small{
  font-family:var(--f-mono);
  font-size:0.6rem;
  letter-spacing:0.2em;
  opacity:0.6;
  text-transform:uppercase;
}
.brand-logo-pic{display:flex;align-items:center;}
.brand-logo-pic img{display:block;height:1.05em;width:auto;}
.nav{display:flex;align-items:center;gap:2.4rem;}
.nav-links{display:flex;gap:2.2rem;}
.nav-links a{
  font-family:var(--f-mono);
  font-size:var(--step--1);
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--white);
  opacity:0.78;
  position:relative;
  padding-bottom:4px;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--sand);transition:width 0.3s var(--ease);
}
.nav-links a:hover, .nav-links a[aria-current="page"]{opacity:1;}
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after{width:100%;}
.nav-toggle{display:none;color:var(--white);z-index:110;}
.nav-toggle .bar{display:block;width:26px;height:1px;background:currentColor;margin:6px 0;transition:transform 0.3s var(--ease), opacity 0.3s var(--ease);}

@media (max-width: 900px){
  .nav-toggle{display:block;}
  .brand small{display:none;}
  .nav-links{
    position:fixed;inset:0;
    background:var(--ink);
    flex-direction:column;
    justify-content:center;
    align-items:flex-start;
    padding:2rem clamp(1.25rem,6vw,3rem);
    gap:1.6rem;
    transform:translateX(100%);
    transition:transform 0.5s var(--ease);
  }
  .nav-links a{font-size:var(--step-1);}
  body.nav-open{overflow:hidden;}
  /* backdrop-filter on the scrolled header creates a containing block for its
     position:fixed descendants (.nav-links, .lang-switch), pinning them to the
     small header box instead of the viewport — drop it while the menu is open. */
  body.nav-open .site-header.is-scrolled{backdrop-filter:none;-webkit-backdrop-filter:none;}
  body.nav-open .nav-links{transform:translateX(0);}
  body.nav-open .nav-toggle .bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
  body.nav-open .nav-toggle .bar:nth-child(2){opacity:0;}
  body.nav-open .nav-toggle .bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
}

/* ==========================================================================
   Dark section / blueprint ground
   ========================================================================== */
.section{padding:clamp(4rem,9vw,8rem) 0;}
.dark{
  background:var(--ink);
  color:var(--white);
  position:relative;
  overflow:hidden;
}
.blueprint-ground{
  background:
    linear-gradient(var(--blueprint) 0%, var(--blueprint) 100%);
  color:var(--line);
  position:relative;
  overflow:hidden;
}
.blueprint-ground::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(0deg, rgba(220,230,247,0.08) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(220,230,247,0.08) 0 1px, transparent 1px 64px);
  pointer-events:none;
}

/* ==========================================================================
   Placeholder media blocks
   ========================================================================== */
.ph{
  position:relative;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  background:var(--steel-soft);
}
.ph::after{
  content:attr(data-label);
  font-family:var(--f-mono);
  font-size:var(--step--1);
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:rgba(10,12,10,0.55);
  padding:0.9rem 1.1rem;
  width:100%;
  background:linear-gradient(0deg, rgba(255,255,255,0.55), transparent);
}
.ph.macro{background:repeating-linear-gradient(135deg, #97a3ad 0 18px, #8a97a1 18px 36px);}
.ph.micro{background:repeating-linear-gradient(135deg, #d8bd8c 0 18px, #cdae76 18px 36px);}
.ph.macro::after{color:rgba(10,14,20,0.6);}
.ph.micro::after{color:rgba(40,26,8,0.6);}
.ph.square{aspect-ratio:1/1;}
.ph.landscape{aspect-ratio:16/10;}
.ph.portrait{aspect-ratio:4/5;}
.ph.wide{aspect-ratio:21/9;}
.ph-photo img{display:block;width:100%;height:100%;object-fit:cover;}
.ph-photo::after{content:none;}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  min-height:100svh;
  display:flex;
  align-items:flex-end;
  padding-top:8rem;
}
.hero.hero-compact{
  min-height:0;
  height:48svh;
  padding-top:7rem;
  overflow:hidden;
}
.hero.hero-compact .container{padding-bottom:1.6rem;}
.hero.hero-compact .eyebrow{margin-bottom:0;}
.hero.hero-compact h1{font-size:var(--step-2);margin-top:0.5rem;}
.hero.hero-compact .lede{font-size:var(--step--1);margin-top:0.6rem;max-width:70ch;}
.hero-slideshow{
  position:absolute;inset:0;
  z-index:0;
}
.hero-slide{
  position:absolute;inset:0;
  opacity:0;
  transition:opacity 1.6s var(--ease);
}
.hero-slide.is-active{opacity:1;}
.hero-slide picture,
.hero-slide img{object-position:center;}
.hero-slide .ph{width:100%;height:100%;}
.hero-slide picture,
.hero-slide img{display:block;width:100%;height:100%;object-fit:cover;}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(11,14,19,0.35) 0%, rgba(11,14,19,0.55) 55%, rgba(11,14,19,0.95) 100%);
  z-index:1;
}
.hero .container{position:relative;z-index:2;padding-bottom:5rem;}
.hero h1{
  font-size:var(--step-5);
  color:var(--white);
  max-width:16ch;
  margin-top:1.4rem;
}
.hero h1 em{
  font-style:italic;
  color:var(--sand-soft);
}
.hero-foot{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:2rem;
  margin-top:2.6rem;
  flex-wrap:wrap;
}
.hero-foot .lede{color:rgba(255,255,255,0.82);}
.scroll-cue{
  font-family:var(--f-mono);
  font-size:var(--step--1);
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--white);
  display:flex;align-items:center;gap:0.8rem;
  opacity:0.7;
}
.scroll-cue .line{width:1px;height:34px;background:currentColor;position:relative;overflow:hidden;}
.scroll-cue .line::after{
  content:"";position:absolute;top:-100%;left:0;width:100%;height:100%;
  background:var(--sand-soft);
  animation:travel 2.4s ease-in-out infinite;
}
@keyframes travel{
  0%{top:-100%;}
  60%{top:100%;}
  100%{top:100%;}
}

/* ==========================================================================
   Dual Track
   ========================================================================== */
.dual-track{
  display:grid;
  grid-template-columns:1fr 1fr;
  min-height:88vh;
}
.track{
  position:relative;
  padding:5rem clamp(1.5rem,4vw,4rem);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  overflow:hidden;
  transition:flex-grow 0.6s var(--ease);
}
.track-bg{position:absolute;inset:0;z-index:0;opacity:0.9;}
.track-bg .ph{width:100%;height:100%;}
/* Dynamic colour shift of the card backgrounds, mirroring the hero slideshow:
   the opposite palette cross-fades in under the placeholder label (.ph::before),
   while a second dark scrim (.track::after) swaps the overlay tint in sync. */
.track-bg .ph::before{
  content:"";
  position:absolute;inset:0;
  opacity:0;
}
.track.macro .track-bg .ph::before{background:repeating-linear-gradient(135deg, #d8bd8c 0 18px, #cdae76 18px 36px);}
.track.micro .track-bg .ph::before{background:repeating-linear-gradient(135deg, #97a3ad 0 18px, #8a97a1 18px 36px);}
.track-bg .ph::after{position:relative;}
.track::after{
  content:"";
  position:absolute;inset:0;z-index:1;
  opacity:0;
}
.track.macro::after{background:linear-gradient(180deg, rgba(35,24,10,0.5), rgba(20,14,6,0.9));}
.track.micro::after{background:linear-gradient(180deg, rgba(10,20,32,0.55), rgba(10,20,32,0.92));}
@media (prefers-reduced-motion: no-preference){
  .track-bg .ph::before,
  .track::after{animation:track-fade 8.4s var(--ease) infinite;}
}
@keyframes track-fade{
  0%,38%{opacity:0;}
  50%,88%{opacity:1;}
  100%{opacity:0;}
}
.track::before{
  content:"";position:absolute;inset:0;z-index:1;
}
.track.macro::before{background:linear-gradient(180deg, rgba(10,20,32,0.55), rgba(10,20,32,0.92));}
.track.micro::before{background:linear-gradient(180deg, rgba(35,24,10,0.5), rgba(20,14,6,0.9));}
.track > *{position:relative;z-index:2;}
.track h3{color:var(--white);font-size:var(--step-3);max-width:12ch;margin-top:1rem;}
.track .lede{color:rgba(255,255,255,0.85);}
.track .eyebrow{color:var(--white);}
.track-tags{display:flex;flex-wrap:wrap;gap:0.6rem;margin-top:1.6rem;}
.track-tags span{
  font-family:var(--f-mono);font-size:var(--step--1);
  border:1px solid rgba(255,255,255,0.3);
  padding:0.3rem 0.7rem;color:rgba(255,255,255,0.85);
}
.track .btn{margin-top:2.4rem;align-self:flex-start;}
@media (max-width: 860px){
  .dual-track{grid-template-columns:1fr;}
}

/* ==========================================================================
   Innovation teaser
   ========================================================================== */
.innovation{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(2rem,6vw,6rem);
  align-items:center;
}
.innovation .ph{width:100%;}
.innovation .ph.reveal{transition-delay:0.15s;}
@media (max-width:900px){.innovation{grid-template-columns:1fr;}}

/* ==========================================================================
   Blueprint SVG draw-on-scroll
   ========================================================================== */
.blueprint-diagram{width:100%;height:auto;}
.blueprint-diagram path,
.blueprint-diagram line,
.blueprint-diagram circle,
.blueprint-diagram rect{
  fill:none;
  stroke:var(--line);
  stroke-width:1.4;
  stroke-linecap:round;
  stroke-linejoin:round;
  stroke-dasharray:var(--len,1000);
  stroke-dashoffset:var(--len,1000);
  transition:stroke-dashoffset 2.2s var(--ease);
}
.blueprint-diagram.is-drawn path,
.blueprint-diagram.is-drawn line,
.blueprint-diagram.is-drawn circle,
.blueprint-diagram.is-drawn rect{
  stroke-dashoffset:0;
}
.blueprint-diagram .fill-node{fill:var(--line);stroke:none;opacity:0;transition:opacity 0.6s var(--ease) 1.8s;}
.blueprint-diagram.is-drawn .fill-node{opacity:1;}
.blueprint-diagram text{
  fill:var(--line);
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:0.04em;
  opacity:0;
  transition:opacity 0.6s var(--ease) 2s;
}
.blueprint-diagram.is-drawn text{opacity:0.85;}

/* Traveling signal pulses along each connection — "live network" motif */
.blueprint-diagram .pulse-dot{fill:var(--sand-soft);opacity:0;}
.blueprint-diagram.is-drawn .pulse-dot{opacity:0.95;}
@media (prefers-reduced-motion: no-preference){
  .blueprint-diagram.is-drawn .pulse-dot-1{offset-path:path("M 430 90 C 400 150, 400 180, 380 230");animation:pulse-travel 3.4s linear 2.4s infinite;}
  .blueprint-diagram.is-drawn .pulse-dot-2{offset-path:path("M 430 90 C 300 100, 200 120, 120 140");animation:pulse-travel 3.8s linear 2.6s infinite;}
  .blueprint-diagram.is-drawn .pulse-dot-3{offset-path:path("M 430 90 C 550 120, 630 150, 700 180");animation:pulse-travel 3.1s linear 2.2s infinite;}
  .blueprint-diagram.is-drawn .pulse-dot-4{offset-path:path("M 380 230 C 500 220, 600 200, 700 180");animation:pulse-travel 3.6s linear 2.8s infinite;}
}
@keyframes pulse-travel{
  from{offset-distance:0%;}
  to{offset-distance:100%;}
}

/* ==========================================================================
   Reveal on scroll (generic)
   ========================================================================== */
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* Eyebrow underline draws in alongside its section reveal */
.reveal .eyebrow::before{transform-origin:left;transform:scaleX(0);transition:transform 0.7s var(--ease) 0.55s;}
.reveal.is-visible .eyebrow::before{transform:scaleX(1);}
[dir="rtl"] .reveal .eyebrow::before{transform-origin:right;transform:scaleX(0);}
[dir="rtl"] .reveal.is-visible .eyebrow::before{transform:scaleX(-1);}

/* ---- Section-head reveal: reliable fade + rise, slightly slower/heavier
   than the base .reveal so headline blocks feel more deliberate. ---- */
.section-head.reveal, .quote.reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity 1.1s var(--ease), transform 1.1s var(--ease);
}
.section-head.reveal.is-visible, .quote.reveal.is-visible{opacity:1;transform:translateY(0);}

/* Staggered entrance for above-the-fold intros (no scroll trigger needed) */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(18px);}
  to{opacity:1;transform:translateY(0);}
}
.stagger-in > *{opacity:0;animation:fadeUp 0.85s var(--ease) forwards;}
.stagger-in > *:nth-child(1){animation-delay:0.05s;}
.stagger-in > *:nth-child(2){animation-delay:0.22s;}
.stagger-in > *:nth-child(3){animation-delay:0.4s;}
.stagger-in > *:nth-child(4){animation-delay:0.58s;}

/* ---- Corner marks: technical viewfinder brackets, drawn in pure CSS
   gradients — the panel/photo hover signature across the site. ---- */
.corner-marks{position:relative;}
.corner-marks::before{
  content:"";
  position:absolute;inset:14px;
  pointer-events:none;
  opacity:0;
  z-index:2;
  transition:opacity 0.45s var(--ease), inset 0.45s var(--ease);
  background-image:
    linear-gradient(currentColor,currentColor), linear-gradient(currentColor,currentColor),
    linear-gradient(currentColor,currentColor), linear-gradient(currentColor,currentColor),
    linear-gradient(currentColor,currentColor), linear-gradient(currentColor,currentColor),
    linear-gradient(currentColor,currentColor), linear-gradient(currentColor,currentColor);
  background-size:18px 1.5px, 1.5px 18px, 18px 1.5px, 1.5px 18px, 18px 1.5px, 1.5px 18px, 18px 1.5px, 1.5px 18px;
  background-position:top left, top left, top right, top right, bottom left, bottom left, bottom right, bottom right;
  background-repeat:no-repeat;
}
.corner-marks:hover::before, .corner-marks:focus-within::before{opacity:0.85;inset:9px;}
.trident-panel.corner-marks::before{color:var(--blueprint-2);}
.team-photo-wrap.corner-marks::before{color:var(--sand);inset:6px;}
.team-row:hover .team-photo-wrap.corner-marks::before{opacity:0.9;inset:0px;}

/* ==========================================================================
   Section headers / grid utilities
   ========================================================================== */
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:2rem;
  margin-bottom:clamp(2.5rem,6vw,4.5rem);
  flex-wrap:wrap;
}
.hairline{border-top:1px solid var(--line-hair-dark);}
.dark .hairline, .blueprint-ground .hairline{border-top-color:var(--line-hair);}

/* ==========================================================================
   Cards / project grid
   ========================================================================== */
.card-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:clamp(1.5rem,3vw,3rem);
}
.card{
  display:block;
  border-top:1px solid var(--line-hair-dark);
  padding-top:1.6rem;
}
.card figure{margin-bottom:1.4rem;overflow:hidden;}
.card .ph{transition:transform 0.7s var(--ease);}
.card:hover .ph{transform:scale(1.035);}
.card-thumb{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  display:block;
  transition:transform 0.7s var(--ease);
  filter:grayscale(8%);
}
.card:hover .card-thumb{transform:scale(1.035);}
.card .tag{
  font-family:var(--f-mono);font-size:var(--step--1);
  letter-spacing:0.08em;text-transform:uppercase;opacity:0.6;
}
.card h4{
  font-family:var(--f-display);font-size:var(--step-2);
  margin-top:0.6rem;font-weight:600;
}
.card p{margin-top:0.6rem;opacity:0.78;max-width:48ch;}
@media (max-width:760px){.card-grid{grid-template-columns:1fr;}}
@media (max-width:640px){.card-grid[style*="grid-template-columns:1fr 1fr"]{grid-template-columns:1fr !important;}}

/* ==========================================================================
   Stat strip
   ========================================================================== */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line-hair);
  border-bottom:1px solid var(--line-hair);
}
.stat{
  padding:2.4rem 1.5rem;
  border-left:1px solid var(--line-hair);
}
.stat:first-child{border-left:none;}
.stat .num{
  font-family:var(--f-display);font-size:var(--step-3);
  color:var(--sand-soft);
}
.stat .label{
  font-family:var(--f-mono);font-size:var(--step--1);
  letter-spacing:0.06em;text-transform:uppercase;opacity:0.7;margin-top:0.5rem;
}
@media (max-width:760px){
  .stat-strip{grid-template-columns:1fr 1fr;}
  .stat:nth-child(3){border-left:none;}
}

/* ==========================================================================
   Before / After Blueprint Slider
   ========================================================================== */
.ba-slider{
  position:relative;
  width:100%;
  aspect-ratio:16/10;
  overflow:hidden;
  user-select:none;
  touch-action:pan-y;
}
.ba-slider .ba-layer{
  position:absolute;inset:0;
  width:100%;height:100%;
}
.ba-slider .ba-layer.ba-after{
  clip-path:inset(0 0 0 var(--pos, 50%));
}
.ba-slider .ba-layer .ph{width:100%;height:100%;}
.ba-handle{
  position:absolute;top:0;bottom:0;
  left:var(--pos, 50%);
  width:0;
  cursor:ew-resize;
  z-index:5;
}
.ba-handle::before{
  content:"";position:absolute;top:0;bottom:0;left:-0.5px;width:1px;
  background:var(--white);
}
.ba-handle .grip{
  position:absolute;top:50%;left:50%;
  transform:translate(-50%,-50%);
  width:52px;height:52px;
  border-radius:50%;
  border:1px solid var(--white);
  background:rgba(11,14,19,0.65);
  display:flex;align-items:center;justify-content:center;
  color:var(--white);
  font-family:var(--f-mono);font-size:0.7rem;
}
.ba-handle .grip::before{content:"◂ ▸";letter-spacing:0.3em;}
.ba-label{
  position:absolute;bottom:1.2rem;
  font-family:var(--f-mono);font-size:var(--step--1);
  letter-spacing:0.1em;text-transform:uppercase;
  color:var(--white);
  padding:0.5rem 0.9rem;
  border:1px solid rgba(255,255,255,0.4);
  background:rgba(11,14,19,0.45);
  z-index:4;
}
.ba-label.lbl-render{left:1.2rem;}
.ba-label.lbl-blueprint{right:1.2rem;}

/* ==========================================================================
   Project detail layout
   ========================================================================== */
.project-hero{
  min-height:80svh;
  display:flex;align-items:flex-end;
  position:relative;
}
.project-hero .ph{position:absolute;inset:0;width:100%;height:100%;}
.project-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(11,14,19,0.1), rgba(11,14,19,0.92));
}
.project-hero .container{position:relative;z-index:2;padding-bottom:4rem;}
.meta-row{
  display:flex;flex-wrap:wrap;gap:2.2rem;
  margin-top:2rem;padding-top:1.6rem;
  border-top:1px solid var(--line-hair);
}
.meta-row div{display:flex;flex-direction:column;gap:0.3rem;}
.meta-row .k{font-family:var(--f-mono);font-size:var(--step--1);letter-spacing:0.08em;text-transform:uppercase;opacity:0.6;}
.meta-row .v{font-family:var(--f-display);font-size:var(--step-1);}

.split{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:clamp(2rem,5vw,5rem);
  align-items:start;
}
@media (max-width:900px){.split{grid-template-columns:1fr;}}

/* ==========================================================================
   Trident
   ========================================================================== */
.trident{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line-hair-dark);
  border:1px solid var(--line-hair-dark);
}
.trident-panel{
  background:var(--paper);
  padding:2.6rem 2rem;
  transition:opacity 0.9s var(--ease), transform 0.6s var(--ease), box-shadow 0.5s var(--ease), background 0.5s var(--ease);
}
.trident-panel:hover{
  transform:translateY(-6px);
  box-shadow:0 20px 44px rgba(11,14,19,0.09);
  z-index:1;
}
.trident-panel.reveal:nth-child(2){transition-delay:0.12s;}
.trident-panel.reveal:nth-child(3){transition-delay:0.24s;}
.trident-panel .roman{
  font-family:var(--f-display);font-style:italic;
  font-size:var(--step-1);opacity:0.4;
  display:inline-block;
  transition:transform 0.5s var(--ease), opacity 0.5s var(--ease);
}
.trident-panel:hover .roman{transform:translateX(4px);opacity:0.7;}
.trident-panel h4{font-family:var(--f-display);font-size:var(--step-2);margin-top:1rem;}
.trident-panel p{margin-top:0.9rem;opacity:0.8;}
@media (max-width:820px){.trident{grid-template-columns:1fr;}}

/* ==========================================================================
   Team — I Volti di RAIL55
   ========================================================================== */
.team-list{display:flex;flex-direction:column;}
.team-row{
  display:grid;
  grid-template-columns:clamp(260px,30vw,380px) 1fr;
  gap:clamp(2.5rem,6vw,5rem);
  align-items:center;
  padding:clamp(3rem,6vw,4.5rem) 0;
}
.team-row + .team-row{border-top:1px solid var(--line-hair-dark);}
.team-row.flip{grid-template-columns:1fr clamp(260px,30vw,380px);}
.team-photo-wrap{position:relative;}
.team-initial{
  position:absolute;
  top:clamp(-2.2rem,-4vw,-1.4rem);
  left:clamp(-1.6rem,-3vw,-1rem);
  z-index:0;
  font-family:var(--f-display);font-style:italic;font-weight:500;
  font-size:clamp(7rem,14vw,11rem);
  line-height:1;
  color:transparent;
  -webkit-text-stroke:1.5px var(--line-hair-dark);
  pointer-events:none;user-select:none;
  opacity:0;
  transform:scale(0.86);
  transition:opacity 1.1s var(--ease) 0.3s, transform 1.1s var(--ease) 0.3s;
}
.team-row.is-visible .team-initial{opacity:1;transform:scale(1);}
.team-row.flip .team-initial{left:auto;right:clamp(-1.6rem,-3vw,-1rem);}
.team-photo{
  position:relative;z-index:1;
  aspect-ratio:4/5;
  overflow:hidden;
  border:1px solid var(--line-hair-dark);
  background:var(--steel-soft);
}
.team-photo img{
  display:block;width:100%;height:100%;object-fit:cover;
  filter:grayscale(1) contrast(1.04);
  transition:filter 0.8s var(--ease), transform 0.8s var(--ease);
}
.team-row:hover .team-photo img{filter:grayscale(0) contrast(1);transform:scale(1.035);}
.team-copy .role{
  font-family:var(--f-mono);font-size:var(--step--1);
  letter-spacing:0.1em;text-transform:uppercase;opacity:0.55;
}
.team-copy h3{font-family:var(--f-display);font-size:var(--step-3);margin-top:0.5rem;}
.team-copy .meta-row{margin-top:1.3rem;padding-top:1.1rem;gap:1.7rem;}
.team-copy .meta-row div{gap:0.2rem;}
.team-copy .meta-row .k{font-size:0.72rem;}
.team-copy .meta-row .v{font-family:var(--f-body);font-size:1rem;font-weight:600;letter-spacing:normal;}
.team-copy .intro{margin-top:1.4rem;font-size:var(--step-0);line-height:1.6;opacity:0.85;max-width:62ch;}
.team-more{margin-top:1.2rem;}
.team-more[open]{margin-top:1.2rem;}
.team-more summary{
  display:inline-flex;align-items:center;gap:0.4rem;
  font-family:var(--f-mono);font-size:var(--step--1);
  letter-spacing:0.06em;text-transform:uppercase;
  cursor:pointer;opacity:0.7;
  list-style:none;
}
.team-more summary::-webkit-details-marker{display:none;}
.team-more summary::before{content:"+";font-size:1.1em;}
.team-more[open] summary::before{content:"–";}
.team-more[open] summary .lbl-more{display:none;}
.team-more:not([open]) summary .lbl-less{display:none;}
.team-more .bio-rest{margin-top:1rem;max-width:62ch;}
.team-more .bio-rest p{margin-top:0.9rem;opacity:0.8;line-height:1.6;}
.team-more .bio-rest p:first-child{margin-top:0;}
@media (max-width:820px){
  .team-row,.team-row.flip{grid-template-columns:1fr;}
  .team-photo-wrap{order:-1;max-width:280px;}
  .team-initial{display:none;}
  .team-copy .meta-row{flex-wrap:wrap;gap:1.2rem 2rem;}
}
[dir="rtl"] .team-initial{left:auto;right:clamp(-1.6rem,-3vw,-1rem);}
[dir="rtl"] .team-row.flip .team-initial{right:auto;left:clamp(-1.6rem,-3vw,-1rem);}

/* ==========================================================================
   Footprint map
   ========================================================================== */
.footprint{
  position:relative;
  padding:clamp(2.5rem,5vw,4rem) 0;
}
.footprint .section-head{
  display:block;
  margin-bottom:0;
}
.footprint .section-head > div:first-child{margin-bottom:1.2rem;}
.footprint-lede-wrap{
  display:grid;
  grid-template-columns:1fr minmax(420px,760px);
  align-items:center;
  gap:2.5rem;
}
.footprint-lede-wrap .lede{max-width:44ch;}
.footprint-plan{
  display:block;
  width:100%;
  pointer-events:none;
}
.footprint-plan img{display:block;width:100%;height:auto;}
@media (max-width:820px){
  .footprint-lede-wrap{grid-template-columns:1fr;}
}
.footprint .blueprint-diagram{max-width:460px;margin:0.5rem auto 0;display:block;}

/* ==========================================================================
   Blueprint Genesis Strip (home)
   ========================================================================== */
.genesis{padding:clamp(2rem,4vw,3rem) 0 1rem;}
.genesis .section-head{display:block;margin-bottom:0.6rem;}
.genesis .section-head > div:first-child{margin-bottom:0.6rem;}
.genesis .section-head .lede{max-width:none;width:100%;}
.genesis .blueprint-diagram{max-width:420px;margin:0 auto;display:block;}
.genesis-plan{display:block;width:100%;margin-top:0;pointer-events:none;}
.genesis-plan img{display:block;width:100%;height:auto;}
.footprint-legend{
  display:flex;gap:2.4rem;flex-wrap:wrap;
  margin-top:1.2rem;justify-content:center;
}
.footprint-legend div{
  display:flex;align-items:center;gap:0.6rem;font-family:var(--f-mono);font-size:var(--step--1);letter-spacing:0.06em;text-transform:uppercase;
  opacity:0;transform:translateY(10px);
  transition:opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.footprint-legend.is-visible div{opacity:1;transform:translateY(0);}
.footprint-legend.is-visible div:nth-child(1){transition-delay:0.05s;}
.footprint-legend.is-visible div:nth-child(2){transition-delay:0.17s;}
.footprint-legend.is-visible div:nth-child(3){transition-delay:0.29s;}
.footprint-legend.is-visible div:nth-child(4){transition-delay:0.41s;}
.footprint-legend .dot{width:8px;height:8px;border-radius:50%;background:var(--sand-soft);}
@media (prefers-reduced-motion: no-preference){
  .blueprint-diagram.is-drawn .fill-node{animation:node-pulse 2.6s ease-in-out 2s infinite;}
}
@keyframes node-pulse{
  0%,100%{opacity:1;}
  50%{opacity:0.35;}
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{
  background:var(--ink);
  color:var(--white);
  padding:5rem 0 2rem;
}
.footer-top{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:2.5rem;
  padding-bottom:3.5rem;
  border-bottom:1px solid var(--line-hair);
}
.footer-top h5{
  font-family:var(--f-mono);font-size:var(--step--1);
  letter-spacing:0.1em;text-transform:uppercase;opacity:0.6;
  margin-bottom:1.2rem;
}
.footer-top a, .footer-top p{
  display:block;
  opacity:0.85;
  margin-bottom:0.6rem;
}
.footer-bottom{
  display:flex;justify-content:space-between;
  padding-top:2rem;
  font-family:var(--f-mono);font-size:var(--step--1);
  opacity:0.55;flex-wrap:wrap;gap:1rem;
}
@media (max-width:820px){
  .footer-top{grid-template-columns:1fr 1fr;}
}

/* ==========================================================================
   Misc
   ========================================================================== */
.center-head{text-align:center;margin-inline:auto;}
.tag-row{display:flex;flex-wrap:wrap;gap:0.6rem;}
.tag-row span{
  font-family:var(--f-mono);font-size:var(--step--1);
  border:1px solid var(--line-hair-dark);padding:0.35rem 0.8rem;
}
.dark .tag-row span, .blueprint-ground .tag-row span{border-color:var(--line-hair);}
.quote{
  font-family:var(--f-display);font-style:italic;
  font-size:var(--step-2);max-width:26ch;line-height:1.35;
}
.quote-actions.reveal{transition-delay:0.2s;}
.quote-actions .btn{transition:transform 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);}
.quote-actions .btn:hover{transform:translateY(-3px);}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4rem);}
@media (max-width:820px){.two-col{grid-template-columns:1fr;}}
.plan-inset{
  display:block;
  width:100%;
  max-width:420px;
  margin-top:2.4rem;
  pointer-events:none;
}
.plan-inset img{display:block;width:100%;height:auto;}

/* Planimetria entrance: fades in, focuses from a soft blur, settles from a slight zoom */
.genesis-plan.reveal, .footprint-plan.reveal, .plan-inset.reveal{
  opacity:0;
  transform:scale(0.94);
  filter:blur(8px);
  transition:opacity 1.2s var(--ease), transform 1.2s var(--ease), filter 1.2s var(--ease);
}
.genesis-plan.reveal.is-visible, .footprint-plan.reveal.is-visible, .plan-inset.reveal.is-visible{
  opacity:1;
  transform:scale(1);
  filter:blur(0);
}

/* ==========================================================================
   Language Switcher
   ========================================================================== */
.lang-switch{
  display:flex;
  align-items:center;
  gap:0.5rem;
  margin-inline-start:0.5rem;
  padding-inline-start:1.4rem;
  border-inline-start:1px solid var(--line-hair);
}
.lang-switch a{
  display:flex;align-items:center;justify-content:center;
  width:30px;height:30px;
  font-size:1.05rem;
  border-radius:50%;
  opacity:0.55;
  filter:grayscale(35%);
  transition:opacity 0.25s var(--ease), filter 0.25s var(--ease), background 0.25s var(--ease);
}
.lang-switch a:hover{opacity:0.9;filter:grayscale(0%);}
.lang-switch a[aria-current="true"]{
  opacity:1;filter:grayscale(0%);
  background:rgba(255,255,255,0.12);
  box-shadow:0 0 0 1px var(--line-hair);
}
@media (max-width:900px){
  .lang-switch{
    position:fixed;
    left:0;right:0;bottom:0;
    justify-content:center;
    z-index:105;
    background:var(--ink);
    border-inline-start:none;padding-inline-start:0;margin-inline-start:0;
    padding:1.6rem clamp(1.25rem,6vw,3rem) 2.4rem;
    margin-top:0;
    transform:translateX(100%);
    transition:transform 0.5s var(--ease);
  }
  body.nav-open .lang-switch{transform:translateX(0);}
  .lang-switch a{width:38px;height:38px;font-size:1.3rem;}
}

/* ==========================================================================
   RTL (Arabic)
   ========================================================================== */
html[lang="ar"] body{font-family:var(--f-body-ar);}
html[lang="ar"] h1, html[lang="ar"] h2, html[lang="ar"] h3, html[lang="ar"] .brand,
html[lang="ar"] .quote{font-family:var(--f-display-ar);}
html[lang="ar"] .eyebrow, html[lang="ar"] .nav-links a, html[lang="ar"] .btn,
html[lang="ar"] .ph::after, html[lang="ar"] .meta-row .k, html[lang="ar"] .tag,
html[lang="ar"] .card .tag, html[lang="ar"] .footer-top h5, html[lang="ar"] .footer-bottom,
html[lang="ar"] .track-tags span, html[lang="ar"] .tag-row span, html[lang="ar"] .footprint-legend div{
  font-family:var(--f-mono-ar);
  letter-spacing:0;
}
[dir="rtl"] .eyebrow::before{transform:scaleX(-1);}
[dir="rtl"] .btn::after{content:"←";}
[dir="rtl"] .btn:hover::after{transform:translateX(-4px);}
[dir="rtl"] .hero h1 em,[dir="rtl"] .scroll-cue{unicode-bidi:plaintext;}
[dir="rtl"] .card:hover .ph{transform:scale(1.035);}
[dir="rtl"] .lang-switch{border-inline-start:1px solid var(--line-hair);}
[dir="rtl"] .blueprint-diagram text{direction:ltr;}