/* ==========================================================================
   VERTICAL 4 CONSTRUCTION — Design System
   Palette: blueprint navy / steel / concrete / signal-amber
   ========================================================================== */

:root{
  /* Brand palette — deep construction blues */
  --v4-ink:        #0A1A2F;   /* near-black blueprint navy */
  --v4-blue-950:   #061225;
  --v4-blue-900:   #0B223E;
  --v4-blue-800:   #13345C;
  --v4-blue-700:   #1C4A82;
  --v4-blue-600:   #2563A6;
  --v4-blue-500:   #3A82C9;
  --v4-blue-400:   #6BA3D8;
  --v4-blue-300:   #A8C8E6;
  --v4-blue-200:   #D2E2F2;
  --v4-blue-100:   #EAF1F9;
  --v4-blue-50:    #F4F7FB;

  /* Accents — construction site signal */
  --v4-amber:      #E0A23B;   /* hi-vis / signal */
  --v4-amber-soft: #F2C97A;
  --v4-rust:       #B14A2C;
  --v4-steel:      #4A5B6B;
  --v4-concrete:   #C9CED3;
  --v4-paper:      #F6F4EF;   /* warm off-white */

  /* Type */
  --v4-display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --v4-text:    'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* Layout */
  --v4-max:     1320px;
  --v4-gutter:  clamp(20px, 4vw, 56px);
  --v4-radius:  2px;

  /* Motion */
  --v4-ease:    cubic-bezier(.6,.05,.2,1);
}

/* Reset --------------------------------------------------------------- */
*,*::before,*::after{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  font-family: var(--v4-text);
  font-size: 16px;
  line-height: 1.55;
  color: var(--v4-ink);
  background: var(--v4-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img,svg{ display:block; max-width:100%; }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }
ul{ margin:0; padding:0; list-style:none; }
ol{ margin:0; padding:0; }

/* Selection */
::selection{ background: var(--v4-blue-700); color: #fff; }

/* Custom cursor (desktop) */
.v4-cursor,
.v4-cursor-dot{
  position: fixed; top:0; left:0; pointer-events:none; z-index: 9999;
  transform: translate(-50%,-50%);
  will-change: transform;
}
.v4-cursor{
  width: 38px; height: 38px; border: 1px solid var(--v4-blue-500);
  border-radius: 50%;
  transition: width .25s var(--v4-ease), height .25s var(--v4-ease), background .25s var(--v4-ease), border-color .25s var(--v4-ease);
  mix-blend-mode: difference;
}
.v4-cursor-dot{
  width: 4px; height: 4px; background: var(--v4-amber);
  border-radius: 50%;
}
.v4-cursor.is-hover{ width: 64px; height: 64px; background: rgba(255,255,255,.05); border-color: var(--v4-amber); }
@media (max-width: 1024px){ .v4-cursor, .v4-cursor-dot{ display:none; } }

/* Loader -------------------------------------------------------------- */
.v4-loader{
  position: fixed; inset: 0; z-index: 10000;
  background: var(--v4-blue-950);
  display: grid; place-items: center;
  transition: opacity .6s var(--v4-ease), visibility .6s var(--v4-ease);
}
.v4-loader.is-hidden{ opacity: 0; visibility: hidden; }
.v4-loader__inner{
  text-align: center; color: #fff;
  font-family: var(--v4-display);
}
.v4-loader__mark{
  font-size: clamp(56px, 12vw, 120px);
  font-weight: 800; letter-spacing: -0.04em;
  color: var(--v4-blue-300);
  position: relative;
}
.v4-loader__mark::before{
  content:""; position: absolute; inset: -20px;
  border: 1px solid var(--v4-blue-700); border-radius: 50%;
  animation: v4Spin 4s linear infinite;
}
.v4-loader__mark::after{
  content:""; position: absolute; left: 50%; top: 50%;
  width: 14px; height: 14px; background: var(--v4-amber);
  transform: translate(-50%, -50%);
}
.v4-loader__bar{
  width: 220px; height: 1px; background: var(--v4-blue-800);
  margin: 28px auto 14px; position: relative; overflow: hidden;
}
.v4-loader__bar span{
  position: absolute; inset: 0; background: var(--v4-amber);
  transform: scaleX(0); transform-origin: left;
  animation: v4Load 2.2s var(--v4-ease) forwards;
}
.v4-loader__caption{
  font-size: 11px; letter-spacing: .22em; color: var(--v4-blue-400);
  font-family: var(--v4-text);
}
@keyframes v4Load{ 0%{transform:scaleX(0)} 100%{transform:scaleX(1)} }
@keyframes v4Spin{ to{ transform: rotate(360deg); } }

/* Navigation ---------------------------------------------------------- */
.v4-nav{
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px var(--v4-gutter);
  background: rgba(10, 26, 47, 0);
  color: #fff;
  transition: background .35s var(--v4-ease), color .35s var(--v4-ease), padding .35s var(--v4-ease), border-color .35s var(--v4-ease);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0px);
}
.v4-nav.is-scrolled{
  background: rgba(255,255,255,.92);
  color: var(--v4-ink);
  padding: 14px var(--v4-gutter);
  border-bottom-color: rgba(10,26,47,.08);
  backdrop-filter: blur(10px);
}
.v4-nav__brand{
  display: flex; align-items: center; gap: 12px;
  font-family: var(--v4-display);
}
.v4-nav__mark{
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border: 1px solid currentColor; border-radius: 50%;
  font-weight: 800; letter-spacing: -0.02em;
  font-size: 13px;
  position: relative;
}
.v4-nav__mark::after{
  content:""; position: absolute; inset: 5px;
  border: 1px dashed currentColor; border-radius: 50%; opacity: .5;
}
.v4-nav__name{
  font-size: 12px; letter-spacing: .22em; font-weight: 600;
}
.v4-nav__name em{ font-style: normal; color: var(--v4-amber); }
.v4-nav__menu{
  display: flex; gap: 28px; font-size: 13px; letter-spacing: .12em; font-weight: 500;
}
.v4-nav__menu a{
  position: relative; padding: 6px 0;
}
.v4-nav__menu a::before{
  content: attr(data-num);
  position: absolute; top: -10px; left: -22px;
  font-size: 10px; color: currentColor; opacity: .55;
}
.v4-nav__menu a::after{
  content:""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--v4-ease);
}
.v4-nav__menu a:hover::after{ transform: scaleX(1); }
.v4-nav__cta{
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px;
  border: 1px solid currentColor; border-radius: 999px;
  font-size: 13px; letter-spacing: .12em; font-weight: 500;
  position: relative; overflow: hidden;
  transition: color .3s var(--v4-ease);
}
.v4-nav__cta::before{
  content:""; position: absolute; inset: 0; background: var(--v4-amber);
  transform: translateY(101%); transition: transform .35s var(--v4-ease);
  z-index: -1;
}
.v4-nav__cta:hover{ color: var(--v4-ink); }
.v4-nav__cta:hover::before{ transform: translateY(0); }
.v4-nav__cta-arrow{
  display: inline-block; transition: transform .3s var(--v4-ease);
}
.v4-nav__cta:hover .v4-nav__cta-arrow{ transform: translateX(4px); }
.v4-nav__burger{
  display: none; width: 36px; height: 36px;
  position: relative;
}
.v4-nav__burger span{
  position: absolute; left: 6px; right: 6px; height: 1px; background: currentColor;
  transition: transform .3s var(--v4-ease), opacity .3s var(--v4-ease);
}
.v4-nav__burger span:nth-child(1){ top: 12px; }
.v4-nav__burger span:nth-child(2){ top: 17px; }
.v4-nav__burger span:nth-child(3){ top: 22px; }
.v4-nav.is-open .v4-nav__burger span:nth-child(1){ transform: translateY(5px) rotate(45deg); }
.v4-nav.is-open .v4-nav__burger span:nth-child(2){ opacity: 0; }
.v4-nav.is-open .v4-nav__burger span:nth-child(3){ transform: translateY(-5px) rotate(-45deg); }
@media (max-width: 1100px){
  .v4-nav__menu, .v4-nav__cta{ display: none; }
  .v4-nav__burger{ display: block; }
}
.v4-mobile{
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  z-index: 90;
  background: var(--v4-blue-950); color: #fff;
  display: flex; flex-direction: column; justify-content: center; gap: 6px;
  padding: 100px var(--v4-gutter) 60px;
  transform: translateY(-100%);
  visibility: hidden;
  transition: transform .55s var(--v4-ease), visibility 0s linear .55s;
  overflow: hidden;
}
.v4-mobile.is-open{
  transform: translateY(0);
  visibility: visible;
  transition: transform .55s var(--v4-ease), visibility 0s linear 0s;
}
.v4-mobile a{
  font-family: var(--v4-display);
  font-size: clamp(36px, 8vw, 64px);
  font-weight: 700; letter-spacing: -0.02em;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
  display: flex; align-items: baseline; gap: 14px;
}
.v4-mobile a::before{
  content: attr(data-num);
  font-size: 11px; letter-spacing: .22em; color: var(--v4-blue-400);
  font-family: var(--v4-text); font-weight: 400;
}
.v4-mobile__foot{
  margin-top: 30px; font-size: 13px; color: var(--v4-blue-400);
}

/* Container ----------------------------------------------------------- */
.v4-container{
  width: 100%;
  max-width: var(--v4-max);
  margin: 0 auto;
  padding: 0 var(--v4-gutter);
  position: relative;
  z-index: 2;
}

/* Section heads ------------------------------------------------------- */
.v4-section-head{
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 36px;
  font-family: var(--v4-display);
}
.v4-section-head__num{
  font-size: 12px; font-weight: 600;
  padding: 6px 10px;
  border: 1px solid var(--v4-ink);
  letter-spacing: .14em;
}
.v4-section-head--light .v4-section-head__num{ border-color: rgba(255,255,255,.4); color: #fff; }
.v4-section-head__label{
  font-size: 12px; letter-spacing: .28em; font-weight: 500;
}
.v4-section-head--light{ color: rgba(255,255,255,.7); }

/* Type system --------------------------------------------------------- */
.v4-h2{
  font-family: var(--v4-display);
  font-size: clamp(38px, 6.5vw, 96px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 0 0 24px;
  color: var(--v4-ink);
  max-width: 18ch;
}
.v4-h2 em{
  font-style: italic;
  font-family: 'Georgia', serif;
  font-weight: 400;
  color: var(--v4-blue-700);
}
.v4-h2--light{ color: #fff; }
.v4-h2--light em{ color: var(--v4-amber); }
.v4-h4{
  font-family: var(--v4-display);
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 36px 0 12px;
}
.v4-lede{
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.6;
  max-width: 56ch;
  color: var(--v4-ink);
}
.v4-lede--light{ color: rgba(255,255,255,.85); }
.v4-muted{ color: var(--v4-steel); max-width: 56ch; }

/* Buttons ------------------------------------------------------------- */
.v4-btn{
  display: inline-flex; align-items: center; gap: 14px;
  padding: 16px 26px;
  font-family: var(--v4-display);
  font-size: 13px; letter-spacing: .18em; font-weight: 500;
  text-transform: uppercase;
  border-radius: 999px;
  position: relative; overflow: hidden;
  transition: color .3s var(--v4-ease);
}
.v4-btn--solid{
  background: var(--v4-ink); color: #fff;
}
.v4-btn--solid::before{
  content:""; position: absolute; inset: 0; background: var(--v4-amber);
  transform: translateY(101%); transition: transform .4s var(--v4-ease);
  z-index: 0;
}
.v4-btn--solid:hover{ color: var(--v4-ink); }
.v4-btn--solid:hover::before{ transform: translateY(0); }
.v4-btn--solid span, .v4-btn--solid i{ position: relative; z-index: 1; }
.v4-btn--light{ background: #fff; color: var(--v4-ink); }
.v4-btn--light::before{ background: var(--v4-amber); }
.v4-btn--light:hover{ color: var(--v4-ink); }
.v4-btn--ghost{
  background: transparent; color: var(--v4-ink);
  border: 1px solid var(--v4-ink);
}
.v4-btn--ghost::before{ background: var(--v4-ink); }
.v4-btn--ghost:hover{ color: #fff; }
.v4-btn--full{ width: 100%; justify-content: space-between; }
.v4-btn__arrow{
  display: inline-block; transition: transform .3s var(--v4-ease);
  font-style: normal;
}
.v4-btn:hover .v4-btn__arrow{ transform: translateX(4px); }

.v4-link{
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--v4-display);
  font-size: 13px; letter-spacing: .18em; text-transform: uppercase; font-weight: 500;
  padding-bottom: 4px;
  border-bottom: 1px solid currentColor;
  color: var(--v4-ink);
  transition: color .3s var(--v4-ease);
}
.v4-link span{ transition: transform .3s var(--v4-ease); }
.v4-link:hover{ color: var(--v4-blue-700); }
.v4-link:hover span{ transform: translateX(4px); }

/* ==========================================================================
   HERO
   ========================================================================== */
.v4-hero{
  position: relative;
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.v4-hero__bg{
  position: absolute; inset: 0; z-index: 0;
  overflow: hidden;
}
.v4-hero__bg-img{
  position: absolute; inset: -8% 0 -8% 0;
  background:
    linear-gradient(180deg, rgba(6,18,37,.55) 0%, rgba(6,18,37,.85) 100%),
    url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?auto=format&fit=crop&w=2400&q=80') center/cover no-repeat;
  /* slow scale-up for parallax depth */
  transform: scale(1.06);
  will-change: transform;
}
.v4-hero__bg-tint{
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,34,62,.55) 0%, rgba(6,18,37,.85) 60%, rgba(6,18,37,.95) 100%);
}
.v4-hero__grid{
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 75%);
  opacity: .5;
}
.v4-hero__vignette{
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 70%, transparent 30%, rgba(6,18,37,.55) 80%);
}

.v4-hero__meta{
  position: absolute;
  font-family: var(--v4-display);
  font-size: 11px; letter-spacing: .22em;
  color: rgba(255,255,255,.55);
  display: flex; gap: 18px;
  z-index: 3;
}
.v4-hero__meta--tl{ top: 110px; left: var(--v4-gutter); }
.v4-hero__meta--br{ bottom: 70px; right: 80px; flex-direction: column; align-items: flex-end; gap: 4px; }
.v4-hero__meta span{ position: relative; padding-left: 14px; }
.v4-hero__meta span::before{
  content:""; position: absolute; left: 0; top: 50%;
  width: 6px; height: 1px; background: currentColor;
}

.v4-hero__container{
  position: relative; z-index: 2;
  width: 100%; max-width: var(--v4-max);
  margin: 0 auto;
  padding: 0 var(--v4-gutter);
}
.v4-hero__eyebrow{
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; letter-spacing: .24em;
  margin-bottom: 28px;
  color: rgba(255,255,255,.8);
}
.v4-pulse{
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--v4-amber);
  position: relative;
}
.v4-pulse::after{
  content:""; position: absolute; inset: -6px;
  border: 1px solid var(--v4-amber); border-radius: 50%;
  animation: v4Pulse 2s ease-out infinite;
}
@keyframes v4Pulse{
  0%{ transform: scale(.6); opacity: .9; }
  100%{ transform: scale(2); opacity: 0; }
}

.v4-hero__title{
  font-family: var(--v4-display);
  font-size: clamp(44px, 7.2vw, 112px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: 700;
  margin: 0 0 32px;
  max-width: 16ch;
}
.v4-line{ display: block; overflow: hidden; }
.v4-line > span{ display: inline-block; transform: translateY(110%); animation: v4Rise 1s var(--v4-ease) forwards; }
.v4-line:nth-child(1) > span{ animation-delay: .15s; }
.v4-line:nth-child(2) > span{ animation-delay: .3s; }
.v4-line--accent{ color: var(--v4-amber); font-style: italic; font-family: 'Georgia', serif; font-weight: 400; }
@keyframes v4Rise{ to{ transform: translateY(0); } }

.v4-hero__sub{
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.6;
  max-width: 56ch;
  color: rgba(255,255,255,.75);
  margin: 0 0 36px;
}

.v4-hero__actions{ display: flex; gap: 16px; flex-wrap: wrap; }
.v4-hero__actions .v4-btn--ghost{
  color: #fff; border-color: rgba(255,255,255,.4);
}
.v4-hero__actions .v4-btn--ghost::before{ background: #fff; }
.v4-hero__actions .v4-btn--ghost:hover{ color: var(--v4-ink); }

/* Floating items — they MOVE (parallax) while background stays stable */
.v4-hero__floats{ position: absolute; inset: 0; pointer-events: none; }
.v4-float{
  position: absolute;
  font-family: var(--v4-display);
  font-size: 11px; letter-spacing: .18em;
  color: rgba(255,255,255,.65);
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(6,18,37,.45);
  backdrop-filter: blur(6px);
  will-change: transform;
}
.v4-float--1{ top: 32%; right: 6%; transform: rotate(-2deg); }
.v4-float--2{ top: 70%; right: 14%; transform: rotate(1.5deg); color: var(--v4-amber); border-color: rgba(224,162,59,.5); }
.v4-float--3{
  top: 18%; right: 4%;
  flex-direction: column; align-items: flex-start; gap: 6px;
  padding: 14px 16px;
}
.v4-float__crosshair{
  width: 28px; height: 28px;
  background:
    linear-gradient(transparent calc(50% - .5px), var(--v4-amber) calc(50% - .5px), var(--v4-amber) calc(50% + .5px), transparent calc(50% + .5px)),
    linear-gradient(90deg, transparent calc(50% - .5px), var(--v4-amber) calc(50% - .5px), var(--v4-amber) calc(50% + .5px), transparent calc(50% + .5px));
}
.v4-float__label{ font-size: 10px; letter-spacing: .22em; }
.v4-float--4{
  bottom: 140px; left: 8%;
  flex-direction: column; align-items: flex-start; gap: 6px;
  z-index: 5;
}
.v4-float__rule{ width: 110px; height: 60px; color: var(--v4-blue-400); }

.v4-hero__indicator{
  position: absolute; right: 32px; bottom: 120px;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  font-size: 10px; letter-spacing: .28em; color: rgba(255,255,255,.6);
  font-family: var(--v4-display);
  z-index: 4;
}
.v4-hero__indicator-line{
  width: 1px; height: 80px; background: rgba(255,255,255,.2); position: relative; overflow: hidden;
}
.v4-hero__indicator-line span{
  position: absolute; left: 0; right: 0; top: 0; height: 50%; background: var(--v4-amber);
  animation: v4ScrollLine 2.4s var(--v4-ease) infinite;
}
@keyframes v4ScrollLine{
  0%{ transform: translateY(-100%); }
  100%{ transform: translateY(200%); }
}

/* Ticker */
.v4-ticker{
  position: absolute; bottom: 0; left: 0; right: 0;
  border-top: 1px solid rgba(255,255,255,.15);
  overflow: hidden;
  padding: 18px 0;
  background: rgba(6,18,37,.6);
  backdrop-filter: blur(8px);
  z-index: 3;
}
.v4-ticker__track{
  display: inline-flex; gap: 32px;
  white-space: nowrap;
  font-family: var(--v4-display);
  font-size: 13px; letter-spacing: .28em;
  animation: v4Ticker 38s linear infinite;
  color: rgba(255,255,255,.7);
}
.v4-ticker__track span:nth-child(2n){ color: var(--v4-amber); }
@keyframes v4Ticker{ to{ transform: translateX(-50%); } }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.v4-about{
  position: relative;
  padding: clamp(90px, 12vw, 160px) 0;
  overflow: hidden;
  isolation: isolate;
}
.v4-about__bg{
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
}
.v4-about__bg-img{
  position: absolute; right: -8% top: 5%;
  width: 55%; height: 90%;
  background:
    linear-gradient(90deg, transparent 0%, rgba(246,244,239,0) 30%, rgba(246,244,239,.85) 80%),
    url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?auto=format&fit=crop&w=1800&q=80') center/cover no-repeat;
  opacity: .9;
}
.v4-about__bg-tint{
  position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--v4-paper) 40%, transparent 70%);
}

.v4-about__grid{
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  grid-template-areas:
    "copy pillars"
    "stats stats";
  gap: 64px 64px;
  align-items: start;
  position: relative; z-index: 2;
}
.v4-about__copy{ max-width: 60ch; grid-area: copy; }
.v4-about__pillars{
  grid-area: pillars;
  display: flex; flex-direction: column; gap: 14px;
}
.v4-about__pillars .v4-collapse{ width: 100%; }
.v4-about__stats{
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
  padding: 28px 24px;
  background: var(--v4-blue-950); color: #fff;
  border: 1px solid var(--v4-blue-800);
}
.v4-about__stats > div{ display: flex; flex-direction: column; gap: 4px; }
.v4-about__stats strong{
  font-family: var(--v4-display);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 700; letter-spacing: -0.03em;
  line-height: 1;
  color: var(--v4-amber);
}
.v4-about__stats span{
  font-size: 12px; letter-spacing: .18em; color: var(--v4-blue-300);
}

@media (max-width: 900px){
  .v4-about__grid{
    grid-template-columns: 1fr;
    grid-template-areas:
      "copy"
      "pillars"
      "stats";
    gap: 32px;
  }
  .v4-about__bg-img{ width: 100%; opacity: .25; }
  .v4-about__bg-tint{ background: linear-gradient(180deg, var(--v4-paper) 60%, transparent); }
}

/* Collapse component -------------------------------------------------- */
.v4-collapse{
  border: 1px solid var(--v4-ink);
  background: #fff;
  position: relative;
}
.v4-collapse--h{
  /* horizontal collapse */
}
.v4-collapse--v{
  /* vertical collapse */
}
.v4-collapse__head{
  display: flex; align-items: center; gap: 18px;
  width: 100%; text-align: left;
  padding: 22px 24px;
  position: relative;
}
.v4-collapse--h .v4-collapse__head{ padding: 22px 24px; }
.v4-collapse__num,
.v4-collapse__tag{
  font-family: var(--v4-display);
  font-size: 11px; letter-spacing: .22em; font-weight: 600;
  color: var(--v4-blue-700);
  padding: 4px 8px;
  background: var(--v4-blue-100);
}
.v4-collapse__title{
  font-family: var(--v4-display);
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 600;
  letter-spacing: -0.01em;
  flex: 1;
}
.v4-collapse__sub{
  display: none;
  font-size: 13px; color: var(--v4-steel);
  max-width: 36ch;
}
.v4-collapse__toggle{
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--v4-ink); border-radius: 50%;
  font-family: var(--v4-display);
  font-size: 18px; font-weight: 400;
  transition: transform .3s var(--v4-ease), background .3s var(--v4-ease), color .3s var(--v4-ease);
}
.v4-collapse__head[aria-expanded="true"] .v4-collapse__toggle{
  background: var(--v4-ink); color: var(--v4-amber);
  transform: rotate(45deg);
}
.v4-collapse__body{
  max-height: 0; overflow: hidden;
  transition: max-height .5s var(--v4-ease);
}
.v4-collapse__body p{
  margin: 0;
  padding: 0 24px 24px;
  font-size: 15px; line-height: 1.65; color: var(--v4-steel);
  max-width: 60ch;
}

/* Horizontal collapse variant — slides body out left/right */
.v4-collapse--h .v4-collapse__body{
  /* uses max-height for accessibility */
}

/* Vertical collapse variant — items stack */
.v4-collapse--v .v4-collapse__body{
}

@media (min-width: 800px){
  .v4-collapse--h .v4-collapse__head{
    padding: 26px 28px;
  }
  .v4-collapse__sub{ display: block; }
  .v4-collapse--h .v4-collapse__head{
    grid-template-columns: auto 1fr 1.2fr auto;
  }
}

/* ==========================================================================
   SERVICES — moving background, stable items
   ========================================================================== */
.v4-services{
  position: relative;
  padding: clamp(90px, 12vw, 160px) 0;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.v4-services__bg{
  position: absolute; inset: 0; z-index: 0;
  overflow: hidden;
}
.v4-services__bg-img{
  position: absolute; inset: -10% -2%;
  background:
    url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=2400&q=80') center/cover no-repeat;
  transform: scale(1.08);
  will-change: transform;
}
.v4-services__bg-tint{
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6,18,37,.85) 0%, rgba(11,34,62,.92) 50%, rgba(6,18,37,.92) 100%);
}

.v4-services__grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,.12);
  border-left: 1px solid rgba(255,255,255,.12);
  margin-top: 60px;
}
.v4-svc{
  padding: 36px 28px 40px;
  border-right: 1px solid rgba(255,255,255,.12);
  border-bottom: 1px solid rgba(255,255,255,.12);
  position: relative;
  transition: background .35s var(--v4-ease);
}
.v4-svc:hover{ background: rgba(255,255,255,.04); }
.v4-svc__icon{
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border: 1px solid rgba(255,255,255,.3);
  color: var(--v4-amber);
  margin-bottom: 24px;
  transition: border-color .3s var(--v4-ease), transform .3s var(--v4-ease);
}
.v4-svc:hover .v4-svc__icon{ border-color: var(--v4-amber); transform: rotate(-6deg); }
.v4-svc__icon svg{ width: 28px; height: 28px; }
.v4-svc h3{
  font-family: var(--v4-display);
  font-size: clamp(20px, 1.8vw, 26px);
  font-weight: 600; letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.v4-svc p{
  margin: 0 0 18px;
  color: rgba(255,255,255,.7);
  font-size: 15px; line-height: 1.6;
}
.v4-svc ul{ display: flex; flex-wrap: wrap; gap: 8px; }
.v4-svc ul li{
  font-size: 11px; letter-spacing: .18em;
  padding: 6px 10px;
  border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.8);
}

.v4-services__cta{ margin-top: 60px; }

@media (max-width: 900px){
  .v4-services__grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px){
  .v4-services__grid{ grid-template-columns: 1fr; }
}

/* ==========================================================================
   WORK
   ========================================================================== */
.v4-work{
  padding: clamp(90px, 12vw, 160px) 0;
  position: relative;
  background: var(--v4-paper);
}
.v4-work__head{
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 60px;
}
.v4-work__filters{
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-self: end;
}
.v4-work__filters button{
  font-size: 12px; letter-spacing: .18em;
  padding: 10px 16px;
  border: 1px solid var(--v4-ink);
  border-radius: 999px;
  transition: background .25s var(--v4-ease), color .25s var(--v4-ease);
}
.v4-work__filters button.is-active,
.v4-work__filters button:hover{
  background: var(--v4-ink); color: #fff;
}
.v4-work__grid{
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 28px;
}
.v4-project{
  position: relative;
  display: flex; flex-direction: column;
  transition: opacity .4s var(--v4-ease), transform .4s var(--v4-ease);
}
.v4-project:nth-child(1){ grid-column: span 7; }
.v4-project:nth-child(2){ grid-column: span 5; margin-top: 80px; }
.v4-project:nth-child(3){ grid-column: span 5; }
.v4-project:nth-child(4){ grid-column: span 7; margin-top: -40px; }
.v4-project.is-hidden{ display: none; }

.v4-project__media{
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--v4-blue-100);
  margin-bottom: 20px;
}
.v4-project__media::before{
  content:""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(6,18,37,.4) 100%);
  z-index: 2;
  opacity: 0;
  transition: opacity .35s var(--v4-ease);
}
.v4-project__media::after{
  content:""; position: absolute; inset: 14px;
  border: 1px solid rgba(255,255,255,.5);
  z-index: 3; opacity: 0;
  transition: opacity .35s var(--v4-ease), inset .35s var(--v4-ease);
}
.v4-project:hover .v4-project__media::before{ opacity: 1; }
.v4-project:hover .v4-project__media::after{ opacity: 1; inset: 24px; }
.v4-project__media[data-img="res-1"]{
  background-image: url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?auto=format&fit=crop&w=1600&q=80');
}
.v4-project__media[data-img="com-1"]{
  background-image: url('https://images.unsplash.com/photo-1497366216548-37526070297c?auto=format&fit=crop&w=1600&q=80');
}
.v4-project__media[data-img="res-2"]{
  background-image: url('https://images.unsplash.com/photo-1600607687939-ce8a6c25118c?auto=format&fit=crop&w=1600&q=80');
}
.v4-project__media[data-img="spec-1"]{
  background-image: url('https://images.unsplash.com/photo-1599809275671-b5942cabc7a2?auto=format&fit=crop&w=1600&q=80');
}
.v4-project__media{
  background-size: cover; background-position: center;
}
.v4-project__media{ transform: scale(1); transition: transform 1.2s var(--v4-ease); }
.v4-project:hover .v4-project__media{ transform: scale(1.04); }

.v4-project__num{
  font-family: var(--v4-display);
  font-size: 11px; letter-spacing: .28em; font-weight: 600;
  color: var(--v4-blue-700);
  margin-bottom: 10px;
}
.v4-project h3{
  font-family: var(--v4-display);
  font-size: clamp(22px, 2vw, 30px);
  font-weight: 600; letter-spacing: -0.02em;
  margin: 0 0 6px;
}
.v4-project__meta{
  font-size: 12px; letter-spacing: .18em; color: var(--v4-steel);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.v4-project p{ margin: 0 0 18px; color: var(--v4-steel); max-width: 50ch; }

.v4-work__more{ margin-top: 60px; display: flex; justify-content: center; }

@media (max-width: 900px){
  .v4-work__head{ grid-template-columns: 1fr; }
  .v4-work__filters{ justify-self: start; }
  .v4-work__grid{ grid-template-columns: 1fr; gap: 36px; }
  .v4-project,
  .v4-project:nth-child(n){ grid-column: span 1; margin-top: 0; }
}

/* ==========================================================================
   APPROACH — moving items on stable background
   ========================================================================== */
.v4-approach{
  position: relative;
  padding: clamp(90px, 12vw, 160px) 0;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.v4-approach__bg{
  position: absolute; inset: 0; z-index: 0;
}
.v4-approach__bg-img{
  position: absolute; inset: 0;
  background:
    url('https://images.unsplash.com/photo-1581094288338-2314dddb7ece?auto=format&fit=crop&w=2400&q=80') center/cover no-repeat;
  background-attachment: fixed;
}
.v4-approach__bg-tint{
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,34,62,.92) 0%, rgba(6,18,37,.96) 100%);
}

.v4-steps{
  list-style: none; margin: 60px 0 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,.15);
}
.v4-step{
  padding: 36px 24px 32px 0;
  border-right: 1px solid rgba(255,255,255,.12);
  position: relative;
}
.v4-step:last-child{ border-right: 0; padding-right: 0; }
.v4-step__num{
  font-family: var(--v4-display);
  font-size: clamp(48px, 5vw, 72px);
  font-weight: 700; letter-spacing: -0.04em;
  color: var(--v4-amber);
  line-height: 1;
  margin-bottom: 18px;
}
.v4-step h3{
  font-family: var(--v4-display);
  font-size: 22px; font-weight: 600; letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.v4-step p{
  margin: 0; font-size: 14px; color: rgba(255,255,255,.7);
  line-height: 1.55;
}
@media (max-width: 900px){
  .v4-steps{ grid-template-columns: 1fr 1fr; }
  .v4-step:nth-child(2n){ border-right: 0; padding-right: 0; }
}
@media (max-width: 560px){
  .v4-steps{ grid-template-columns: 1fr; }
  .v4-step{ border-right: 0; padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
  .v4-step:last-child{ border-bottom: 0; }
}

/* ==========================================================================
   EXPERTISE
   ========================================================================== */
.v4-expertise{
  padding: clamp(90px, 12vw, 160px) 0;
  background: var(--v4-paper);
}
.v4-expertise__list{ margin-top: 40px; }

/* ==========================================================================
   NUMBERS — stable background, moving items
   ========================================================================== */
.v4-numbers{
  position: relative;
  padding: clamp(90px, 12vw, 160px) 0;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.v4-numbers__bg{
  position: absolute; inset: 0; z-index: 0;
}
.v4-numbers__bg-img{
  position: absolute; inset: 0;
  background:
    url('https://images.unsplash.com/photo-1503387837-b154d5074bd2?auto=format&fit=crop&w=2400&q=80') center/cover no-repeat;
  background-attachment: fixed;
}
.v4-numbers__bg-tint{
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6,18,37,.92), rgba(11,34,62,.96));
}
.v4-numbers__grid{
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  margin-top: 60px;
  border-top: 1px solid rgba(255,255,255,.15);
}
.v4-num{
  padding: 28px 18px 28px 0;
  border-right: 1px solid rgba(255,255,255,.12);
  display: flex; flex-direction: column; gap: 8px;
}
.v4-num:last-child{ border-right: 0; padding-right: 0; }
.v4-num strong{
  font-family: var(--v4-display);
  font-size: clamp(56px, 7vw, 110px);
  font-weight: 700; letter-spacing: -0.04em;
  color: var(--v4-amber);
  line-height: 1;
}
.v4-num span{
  font-size: 12px; letter-spacing: .18em; color: rgba(255,255,255,.7);
  text-transform: uppercase;
}
@media (max-width: 900px){
  .v4-numbers__grid{ grid-template-columns: repeat(2, 1fr); }
  .v4-num{ padding: 24px 18px 24px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
  .v4-num:nth-child(2n){ border-right: 0; padding-right: 0; }
}

/* ==========================================================================
   TEAM
   ========================================================================== */
.v4-team{
  padding: clamp(90px, 12vw, 160px) 0;
  background: var(--v4-paper);
}
.v4-team__grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
}
.v4-member{ position: relative; }
.v4-member__photo{
  aspect-ratio: 3/4;
  background: var(--v4-blue-100);
  background-size: cover; background-position: center;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}
.v4-member__photo::after{
  content:""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(6,18,37,.5) 100%);
}
.v4-member__photo[data-img="team-1"]{
  background-image: url('https://images.unsplash.com/photo-1560250097-0b93528c311a?auto=format&fit=crop&w=900&q=80');
}
.v4-member__photo[data-img="team-2"]{
  background-image: url('https://images.unsplash.com/photo-1573496359142-b8d87734a5a2?auto=format&fit=crop&w=900&q=80');
}
.v4-member__photo[data-img="team-3"]{
  background-image: url('https://images.unsplash.com/photo-1507003211169-0a1dd7228f2d?auto=format&fit=crop&w=900&q=80');
}
.v4-member__photo[data-img="team-4"]{
  background-image: url('https://images.unsplash.com/photo-1580489944761-15a19d654956?auto=format&fit=crop&w=900&q=80');
}
.v4-member h3{
  font-family: var(--v4-display);
  font-size: 22px; font-weight: 600; letter-spacing: -0.01em;
  margin: 0 0 4px;
}
.v4-member__role{
  font-size: 12px; letter-spacing: .18em; color: var(--v4-blue-700);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.v4-member p{ margin: 0; font-size: 14px; color: var(--v4-steel); line-height: 1.55; }

@media (max-width: 900px){
  .v4-team__grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px){
  .v4-team__grid{ grid-template-columns: 1fr; }
}

/* ==========================================================================
   TESTIMONIALS
   ========================================================================== */
.v4-testi{
  padding: clamp(80px, 10vw, 140px) 0;
  background: var(--v4-blue-50);
  border-top: 1px solid rgba(10,26,47,.08);
  border-bottom: 1px solid rgba(10,26,47,.08);
}
.v4-testi__grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 50px;
}
.v4-quote{
  margin: 0;
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--v4-blue-100);
  position: relative;
}
.v4-quote::before{
  content:"“";
  position: absolute; top: -12px; left: 22px;
  font-family: 'Georgia', serif;
  font-size: 100px; line-height: 1; color: var(--v4-amber);
}
.v4-quote blockquote{
  margin: 24px 0 22px;
  font-family: var(--v4-display);
  font-size: 18px; line-height: 1.5; font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--v4-ink);
}
.v4-quote figcaption strong{
  display: block;
  font-family: var(--v4-display);
  font-size: 14px;
  color: var(--v4-blue-700);
}
.v4-quote figcaption span{
  font-size: 12px; letter-spacing: .14em; color: var(--v4-steel);
}
@media (max-width: 900px){ .v4-testi__grid{ grid-template-columns: 1fr; } }

/* ==========================================================================
   CONTACT — stable background, items moving
   ========================================================================== */
.v4-contact{
  position: relative;
  padding: clamp(90px, 12vw, 160px) 0;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.v4-contact__bg{
  position: absolute; inset: 0; z-index: 0;
}
.v4-contact__bg-img{
  position: absolute; inset: 0;
  background:
    url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?auto=format&fit=crop&w=2400&q=80') center/cover no-repeat;
}
.v4-contact__bg-tint{
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6,18,37,.92), rgba(11,34,62,.95));
}

.v4-contact__grid{
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: start;
  margin-top: 30px;
}
.v4-contact__list{
  margin-top: 50px;
  display: grid; gap: 0;
  border-top: 1px solid rgba(255,255,255,.15);
}
.v4-contact__list li{
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
  font-size: 16px;
}
.v4-contact__list span{
  font-size: 12px; letter-spacing: .2em; color: var(--v4-blue-300);
  text-transform: uppercase;
}
.v4-contact__list a{ transition: color .25s var(--v4-ease); }
.v4-contact__list a:hover{ color: var(--v4-amber); }

.v4-form{
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.15);
  padding: 32px;
  display: flex; flex-direction: column; gap: 18px;
  backdrop-filter: blur(6px);
}
.v4-form__row{ display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.v4-form label{
  display: flex; flex-direction: column; gap: 8px;
  font-size: 11px; letter-spacing: .2em; text-transform: uppercase;
  color: rgba(255,255,255,.7);
}
.v4-form input,
.v4-form select,
.v4-form textarea{
  width: 100%;
  background: rgba(6,18,37,.4);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff;
  font-family: var(--v4-text);
  font-size: 15px;
  padding: 12px 14px;
  border-radius: 0;
  transition: border-color .25s var(--v4-ease), background .25s var(--v4-ease);
}
.v4-form input:focus,
.v4-form select:focus,
.v4-form textarea:focus{
  outline: none;
  border-color: var(--v4-amber);
  background: rgba(6,18,37,.6);
}
.v4-form textarea{ resize: vertical; min-height: 110px; font-family: var(--v4-text); }
.v4-form select{
  appearance: none; -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--v4-amber) 50%),
                    linear-gradient(135deg, var(--v4-amber) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.v4-form select option{ background: var(--v4-blue-900); color: #fff; }
.v4-form__note{
  font-size: 13px; color: var(--v4-amber);
  min-height: 1em;
}

@media (max-width: 900px){
  .v4-contact__grid{ grid-template-columns: 1fr; gap: 48px; }
  .v4-form__row{ grid-template-columns: 1fr; }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.v4-foot{
  background: var(--v4-blue-950);
  color: #fff;
  padding: 70px var(--v4-gutter) 30px;
}
.v4-foot__top{
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 60px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.v4-foot__brand{ display: flex; align-items: flex-start; gap: 18px; }
.v4-foot__mark{
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border: 1px solid var(--v4-amber); color: var(--v4-amber);
  border-radius: 50%;
  font-family: var(--v4-display);
  font-weight: 800; font-size: 16px;
  letter-spacing: -0.02em;
  flex: 0 0 auto;
}
.v4-foot__title{
  font-family: var(--v4-display);
  font-size: 14px; letter-spacing: .22em; font-weight: 600;
  margin-bottom: 8px;
}
.v4-foot__sub{ font-size: 13px; color: var(--v4-blue-300); max-width: 30ch; }

.v4-foot__cols{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.v4-foot__cols h4{
  font-family: var(--v4-display);
  font-size: 12px; letter-spacing: .22em; font-weight: 600;
  color: var(--v4-amber);
  margin: 0 0 18px;
}
.v4-foot__cols ul{ display: flex; flex-direction: column; gap: 10px; }
.v4-foot__cols a{
  font-size: 14px; color: rgba(255,255,255,.8);
  transition: color .25s var(--v4-ease);
}
.v4-foot__cols a:hover{ color: var(--v4-amber); }

.v4-foot__bot{
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px;
  font-size: 12px; letter-spacing: .14em; color: var(--v4-blue-300);
  flex-wrap: wrap; gap: 12px;
}
.v4-foot__meta{ display: flex; gap: 12px; }

@media (max-width: 900px){
  .v4-foot__top{ grid-template-columns: 1fr; gap: 36px; }
  .v4-foot__cols{ grid-template-columns: repeat(2, 1fr); }
}

/* ==========================================================================
   SCROLL REVEAL
   ========================================================================== */
[data-reveal]{
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .9s var(--v4-ease), transform .9s var(--v4-ease);
}
[data-reveal].is-in{ opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .v4-hero__bg-img, .v4-approach__bg-img, .v4-numbers__bg-img, .v4-services__bg-img{
    transform: none !important;
  }
}