/* ==========================================================================
   BIM FLOW MEP SOLUTIONS — Design System
   Concept: "As-built drawing" — engineering title-block layout, hairline
   grid, and the real pipe-tag colour code (CHWS blue / CWR green / fire red
   / electrical amber) pulled straight from the client's own site photos and
   used as the site's signature "flow-tag" chips throughout.
   ========================================================================== */

:root{
  /* ---- colour tokens ---- */
  --ink:        #0B2340;   /* primary navy — headings, header */
  --ink-soft:   #1C3A5E;
  --steel:      #4A6178;   /* muted body-adjacent tone */
  --paper:      #F2F4F2;   /* page background */
  --paper-dim:  #E7EBE8;
  --card:       #FFFFFF;
  --line:       #D7DEDA;   /* hairline / grid rules */

  /* trade colours — lifted directly from the pipe ID tags in project photos */
  --trade-mech:  #1C6FB4;  /* CHWS / ducting blue   */
  --trade-flow:  #3E9B3E;  /* CWR / brand green     */
  --trade-fire:  #C0392B;  /* fire protection red   */
  --trade-elec:  #E1A32A;  /* electrical amber      */

  --text:       #14213A;
  --text-soft:  #4C5B6E;
  --text-invert:#F2F4F2;

  /* ---- type ---- */
  --f-display: "Big Shoulders Display", "Archivo Black", sans-serif;
  --f-body:    "IBM Plex Sans", -apple-system, sans-serif;
  --f-mono:    "IBM Plex Mono", monospace;

  /* ---- layout ---- */
  --gutter: clamp(20px, 5vw, 64px);
  --maxw: 1280px;
  --header-h: 76px;
  --ease: cubic-bezier(.19,1,.22,1);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
[id]{ scroll-margin-top: calc(var(--header-h) + 14px); }
body{
  margin:0;
  font-family:var(--f-body);
  background:var(--paper);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ font-family:var(--f-display); font-weight:700; letter-spacing:.01em; margin:0 0 .4em; color:var(--ink); text-transform:uppercase; }
p{ margin:0 0 1em; color:var(--text-soft); }
:focus-visible{ outline:3px solid var(--trade-elec); outline-offset:3px; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

.wrap{ max-width:var(--maxw); margin:0 auto; padding-inline:var(--gutter); }
.section{ padding:clamp(56px,9vw,110px) 0; position:relative; }
.section--tight{ padding:clamp(36px,6vw,64px) 0; }
.section--dark{ background:var(--ink); color:var(--text-invert); }
.section--dark h2, .section--dark h3, .section--dark h4{ color:var(--text-invert); }
.section--dark p{ color:#B9C4D2; }
.section--dim{ background:var(--paper-dim); }

.grid-rule{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:48px 48px;
}

/* ---- eyebrow / mono labels ---- */
.eyebrow{
  font-family:var(--f-mono);
  font-size:.72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--trade-flow);
  display:flex;
  align-items:center;
  gap:.6em;
  margin-bottom:.9em;
}
.eyebrow::before{ content:""; width:26px; height:2px; background:var(--trade-flow); display:inline-block; }
.section--dark .eyebrow{ color:#7FD37F; }

h1{ font-size:clamp(2.6rem,6vw,5rem); line-height:.98; }
h2{ font-size:clamp(1.9rem,4vw,3rem); line-height:1.05; }
h3{ font-size:clamp(1.2rem,2.4vw,1.6rem); }

.lede{ font-size:clamp(1.05rem,1.6vw,1.25rem); max-width:60ch; }

/* ---- Flow-tag chips (signature element, mirrors the physical pipe labels) ---- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  font-family:var(--f-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  padding:.4em .9em;
  border-radius:999px;
  color:#fff;
  white-space:nowrap;
}
.tag::before{ content:"▸"; font-size:.85em; }
.tag--mech{ background:var(--trade-mech); }
.tag--flow{ background:var(--trade-flow); }
.tag--fire{ background:var(--trade-fire); }
.tag--elec{ background:var(--trade-elec); color:#22180a; }
.tag-row{ display:flex; flex-wrap:wrap; gap:.6rem; }

/* ---- buttons ---- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.6em;
  font-family:var(--f-mono);
  font-size:.85rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  padding:.95em 1.7em;
  border-radius:2px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .35s var(--ease), background .25s, color .25s, border-color .25s;
}
.btn:hover{ transform:translateY(-2px); }
.btn--primary{ background:var(--trade-flow); color:#fff; }
.btn--primary:hover{ background:#357f35; }
.btn--outline{ background:transparent; color:var(--ink); border-color:var(--ink); }
.btn--outline:hover{ background:var(--ink); color:#fff; }
.btn--ghost-invert{ background:transparent; color:#fff; border-color:rgba(255,255,255,.5); }
.btn--ghost-invert:hover{ background:#fff; color:var(--ink); }
.btn svg{ width:14px; height:14px; }

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header{
  position:fixed; inset:0 0 auto 0; height:var(--header-h);
  z-index:1000;
  display:flex; align-items:center;
  background:transparent;
  transition:background .35s var(--ease), box-shadow .35s var(--ease), height .35s var(--ease);
}
.site-header.is-solid{
  background:rgba(11,35,64,.96);
  backdrop-filter:blur(6px);
  box-shadow:0 6px 24px rgba(0,0,0,.18);
}
.site-header .wrap{ display:flex; align-items:center; justify-content:space-between; width:100%; gap:24px; }

.brand{ display:flex; align-items:center; gap:.7rem; }
.brand img{ height:42px; width:42px; border-radius:8px; object-fit:cover; }
.brand-text{ display:flex; flex-direction:column; line-height:1.05; }
.brand-text strong{ font-family:var(--f-display); font-size:1.15rem; color:#fff; letter-spacing:.02em; }
.brand-text span{ font-family:var(--f-mono); font-size:.6rem; letter-spacing:.18em; text-transform:uppercase; color:var(--trade-flow); }

.nav{ display:flex; align-items:center; gap:2rem; }
.nav a{
  font-family:var(--f-mono); font-size:.74rem; letter-spacing:.1em; text-transform:uppercase;
  color:#dfe6ee; position:relative; padding:.4em 0;
}
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:2px;
  background:var(--trade-flow); transform:scaleX(0); transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav a:hover::after, .nav a.is-active::after{ transform:scaleX(1); }
.nav a.is-active{ color:#fff; }

.header-cta{ display:flex; align-items:center; gap:.9rem; }
.nav-toggle{
  display:none; width:42px; height:42px; border-radius:4px; border:1px solid rgba(255,255,255,.35);
  background:transparent; color:#fff; cursor:pointer; flex-direction:column; align-items:center; justify-content:center; gap:5px;
}
.nav-toggle span{ width:20px; height:2px; background:#fff; display:block; transition:transform .3s, opacity .3s; }
.nav-toggle.is-open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity:0; }
.nav-toggle.is-open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

@media (max-width: 980px){
  .nav{
    position:fixed; top:var(--header-h); left:0; right:0; bottom:0;
    background:rgba(11,35,64,.98); flex-direction:column; justify-content:flex-start;
    padding:2.5rem var(--gutter); gap:1.6rem; transform:translateX(100%);
    transition:transform .4s var(--ease); overflow-y:auto;
  }
  .nav.is-open{ transform:translateX(0); }
  .nav a{ font-size:1rem; }
  .nav-toggle{ display:flex; }
  .header-cta .btn--outline{ display:none; }
}

/* ==========================================================================
   HERO — fixed/sticky parallax background
   ========================================================================== */
.hero{
  position:relative;
  min-height:100vh;
  display:flex; align-items:flex-end;
  overflow:clip;
}
.hero__bg{
  position:absolute; inset:0;
  background-position:center; background-size:cover; background-repeat:no-repeat;
  background-attachment:fixed; /* the sticky/parallax technique */
  z-index:0;
}
.hero__scrim{
  position:absolute; inset:0; z-index:1;
  background:
    linear-gradient(180deg, rgba(6,18,34,.55) 0%, rgba(6,18,34,.55) 40%, rgba(6,18,34,.92) 100%);
}
.hero__content{ position:relative; z-index:2; width:100%; padding-block:calc(var(--header-h) + 40px) 72px; color:#fff; }
.hero__content h1{ color:#fff; margin-bottom:.3em; }
.hero__content h1 em{ font-style:normal; color:var(--trade-flow); }
.hero__content .lede{ color:#DCE4EC; margin-bottom:1.8em; }
.hero__cta{ display:flex; flex-wrap:wrap; gap:1rem; margin-bottom:2.4rem; }
.hero__legend{ display:flex; flex-wrap:wrap; gap:.7rem 1.4rem; padding-top:1.6rem; border-top:1px solid rgba(255,255,255,.22); }
.hero__scroll{
  position:absolute; right:var(--gutter); bottom:28px; z-index:2;
  writing-mode:vertical-rl; color:#cfd8e2; font-family:var(--f-mono); font-size:.65rem; letter-spacing:.2em;
  display:flex; align-items:center; gap:.6rem;
}
.hero__scroll::after{ content:""; width:1px; height:40px; background:linear-gradient(#fff,transparent); animation:scrollpulse 2s infinite; }
@keyframes scrollpulse{ 0%,100%{opacity:.2} 50%{opacity:1} }

/* generic inner-page hero (shorter, still fixed-bg) */
.subhero{
  position:relative; min-height:52vh; display:flex; align-items:flex-end; overflow:clip;
}
.subhero__bg{ position:absolute; inset:0; background-position:center; background-size:cover; background-attachment:fixed; z-index:0; }
.subhero__scrim{ position:absolute; inset:0; background:linear-gradient(180deg, rgba(6,18,34,.55), rgba(6,18,34,.92)); z-index:1; }
.subhero__content{ position:relative; z-index:2; padding-block:calc(var(--header-h) + 30px) 52px; color:#fff; width:100%; }
.subhero__content h1{ color:#fff; }
.crumb{ font-family:var(--f-mono); font-size:.72rem; letter-spacing:.14em; text-transform:uppercase; color:#B9C4D2; }
.crumb b{ color:var(--trade-flow); }

@media (hover:none){
  .hero__bg, .subhero__bg{ background-attachment:scroll; } /* mobile Safari fallback */
}

/* ==========================================================================
   SHARED COMPONENTS
   ========================================================================== */

/* reveal-on-scroll */
.reveal{ opacity:0; transform:translateY(28px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-visible{ opacity:1; transform:none; }
.reveal-stagger > *{ transition-delay:calc(var(--i,0) * 90ms); }

/* title-block strip (signature structural device, mirrors drawing title blocks) */
.titleblock{
  display:flex; flex-wrap:wrap; gap:0; border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  font-family:var(--f-mono); font-size:.72rem; letter-spacing:.06em; text-transform:uppercase; color:var(--text-soft);
}
.titleblock div{ padding:.9rem 1.4rem; border-right:1px solid var(--line); flex:1; min-width:150px; }
.titleblock div:last-child{ border-right:none; }
.titleblock b{ display:block; color:var(--ink); font-size:.95rem; letter-spacing:.02em; margin-top:.15rem; }

/* section head layout */
.section-head{ display:flex; justify-content:space-between; align-items:flex-end; gap:2rem; margin-bottom:2.8rem; flex-wrap:wrap; }
.section-head .lede{ margin:0; }

/* card grid */
.grid{ display:grid; gap:1.6rem; }
.grid--3{ grid-template-columns:repeat(3,1fr); }
.grid--4{ grid-template-columns:repeat(4,1fr); }
.grid--2{ grid-template-columns:repeat(2,1fr); }
@media (max-width:980px){ .grid--3,.grid--4{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:640px){ .grid--3,.grid--4,.grid--2{ grid-template-columns:1fr; } }

.card{
  background:var(--card); border:1px solid var(--line); padding:2rem 1.7rem;
  transition:transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
  position:relative;
}
.card:hover{ transform:translateY(-6px); box-shadow:0 20px 40px rgba(11,35,64,.12); border-color:transparent; }
.card__icon{ width:46px; height:46px; border-radius:8px; display:flex; align-items:center; justify-content:center; margin-bottom:1.3rem; color:#fff; }
.card h3{ margin-bottom:.5rem; }
.card p{ margin-bottom:0; font-size:.95rem; }

.numbered{ counter-reset: step; }
.numbered .step{ counter-increment: step; position:relative; padding-left:3.6rem; }
.numbered .step::before{
  content:counter(step, decimal-leading-zero); position:absolute; left:0; top:-.1rem;
  font-family:var(--f-mono); font-size:1.4rem; color:var(--trade-flow);
}

/* photo frame w/ corner marks (drafting crosshairs) */
.frame{ position:relative; }
.frame::before,.frame::after,.frame .c2,.frame .c3{ content:""; position:absolute; width:18px; height:18px; border:2px solid var(--trade-flow); z-index:2; }
.frame::before{ top:-8px; left:-8px; border-right:none; border-bottom:none; }
.frame::after{ bottom:-8px; right:-8px; border-left:none; border-top:none; }

/* stat strip */
.stats{ display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid rgba(255,255,255,.2); }
.stats div{ padding:2rem 1.4rem; border-right:1px solid rgba(255,255,255,.2); }
.stats div:last-child{ border-right:none; }
.stats b{ display:block; font-family:var(--f-display); font-size:clamp(2rem,4vw,3rem); color:#fff; line-height:1; margin-bottom:.3rem; }
.stats span{ font-family:var(--f-mono); font-size:.7rem; letter-spacing:.1em; text-transform:uppercase; color:#9FB0C2; }
@media (max-width:780px){ .stats{ grid-template-columns:repeat(2,1fr); } .stats div:nth-child(2){ border-right:none; } }

/* two column layout */
.split{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(2rem,5vw,5rem); align-items:center; }
@media (max-width:900px){ .split{ grid-template-columns:1fr; } }
.split--rev .split__media{ order:2; }
@media (max-width:900px){ .split--rev .split__media{ order:0; } }

/* ==========================================================================
   CAROUSEL (Projects page)
   ========================================================================== */
.carousel{ position:relative; }
.carousel__track{ display:flex; overflow-x:hidden; scroll-behavior:smooth; gap:0; border:1px solid var(--line); }
.carousel-slide{ min-width:100%; display:none; }
.carousel-slide.is-active{ display:block; }
.carousel-slide__imgs{ display:grid; grid-template-columns:1.5fr 1fr; grid-template-rows:1fr 1fr; gap:2px; background:var(--line); height:420px; }
.carousel-slide__imgs img{ width:100%; height:100%; object-fit:cover; }
.carousel-slide__imgs a:first-child{ grid-row:1 / 3; }
@media (max-width:720px){ .carousel-slide__imgs{ grid-template-columns:1fr; grid-template-rows:repeat(3,180px); height:auto; } .carousel-slide__imgs a:first-child{ grid-row:auto; } }

.carousel-slide__body{ padding:1.8rem 2rem; display:flex; flex-wrap:wrap; justify-content:space-between; gap:1rem; align-items:flex-start; background:#fff; }
.carousel-slide__meta{ display:flex; gap:1.6rem; flex-wrap:wrap; font-family:var(--f-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.08em; color:var(--text-soft); }
.carousel-slide__meta b{ display:block; color:var(--ink); font-size:.85rem; }

.carousel__nav{ display:flex; align-items:center; justify-content:space-between; margin-top:1.4rem; }
.carousel__arrows{ display:flex; gap:.6rem; }
.carousel__arrow{
  width:46px; height:46px; border:1px solid var(--ink); background:transparent; color:var(--ink);
  display:flex; align-items:center; justify-content:center; cursor:pointer; transition:.25s;
}
.carousel__arrow:hover{ background:var(--ink); color:#fff; }
.carousel__dots{ display:flex; gap:.5rem; }
.carousel__dots button{ width:34px; height:4px; background:var(--line); border:none; cursor:pointer; transition:.25s; }
.carousel__dots button.is-active{ background:var(--trade-flow); }

/* portfolio filter grid */
.filters{ display:flex; flex-wrap:wrap; gap:.6rem; margin-bottom:2.4rem; }
.filters button{
  font-family:var(--f-mono); font-size:.72rem; letter-spacing:.08em; text-transform:uppercase;
  padding:.6em 1.1em; border:1px solid var(--line); background:#fff; cursor:pointer; transition:.25s;
}
.filters button:hover{ border-color:var(--trade-flow); }
.filters button.is-active{ background:var(--ink); color:#fff; border-color:var(--ink); }
.portfolio-item{ position:relative; overflow:hidden; aspect-ratio:4/3; }
.portfolio-item img{ width:100%; height:100%; object-fit:cover; transition:transform .6s var(--ease); }
.portfolio-item:hover img{ transform:scale(1.08); }
.portfolio-item__overlay{
  position:absolute; inset:0; background:linear-gradient(180deg, transparent 40%, rgba(11,35,64,.92) 100%);
  display:flex; flex-direction:column; justify-content:flex-end; padding:1.3rem; opacity:0; transition:opacity .35s;
}
.portfolio-item:hover .portfolio-item__overlay{ opacity:1; }
.portfolio-item__overlay h4{ color:#fff; margin-bottom:.3rem; font-size:1.05rem; }
.portfolio-item.is-hidden{ display:none; }

/* portfolio card with description body (used when real project write-ups are available) */
.portfolio-item.portfolio-card{ aspect-ratio:auto; overflow:visible; }
.portfolio-card{ background:var(--card); border:1px solid var(--line); overflow:hidden; transition:transform .4s var(--ease), box-shadow .4s var(--ease); display:flex; flex-direction:column; height:100%; }
.portfolio-card:hover{ transform:translateY(-6px); box-shadow:0 20px 40px rgba(11,35,64,.12); }
.portfolio-card__img{ display:block; width:100%; height:230px; object-fit:cover; }

/* Mini image carousel used inside each portfolio card */
.mini-carousel{ position:relative; height:230px; overflow:hidden; background:var(--paper-dim); }
.mini-carousel__slides{ position:relative; width:100%; height:100%; }
.mini-carousel__slides > a{ position:absolute; inset:0; display:block; opacity:0; transition:opacity .5s var(--ease); }
.mini-carousel__slides > a.is-active{ opacity:1; z-index:1; }
.mini-carousel__slides img{ width:100%; height:100%; object-fit:cover; display:block; }
.mini-carousel__arrow{
  position:absolute; top:50%; transform:translateY(-50%); z-index:2;
  width:32px; height:32px; border-radius:50%; border:none; cursor:pointer;
  background:rgba(11,35,64,.55); color:#fff; display:flex; align-items:center; justify-content:center;
  opacity:0; transition:opacity .25s, background .25s;
}
.mini-carousel__arrow:hover{ background:var(--trade-flow); }
.mini-carousel:hover .mini-carousel__arrow{ opacity:1; }
.mini-carousel__arrow--prev{ left:10px; }
.mini-carousel__arrow--next{ right:10px; }
.mini-carousel__dots{ position:absolute; bottom:10px; left:0; right:0; z-index:2; display:flex; justify-content:center; gap:6px; }
.mini-carousel__dots button{ width:7px; height:7px; padding:0; border:none; border-radius:50%; background:rgba(255,255,255,.55); cursor:pointer; transition:background .25s, transform .25s; }
.mini-carousel__dots button.is-active{ background:#fff; transform:scale(1.2); }
.mini-carousel.is-single .mini-carousel__arrow,
.mini-carousel.is-single .mini-carousel__dots{ display:none; }
.portfolio-card__body{ padding:1.5rem 1.6rem 1.7rem; display:flex; flex-direction:column; flex:1; }
.portfolio-card__body h3{ margin:.6rem 0 .6rem; }
.portfolio-card__body p{ font-size:.92rem; margin-bottom:1.1rem; }
.portfolio-card__meta{ margin-top:auto; display:flex; flex-direction:column; gap:.5rem; font-family:var(--f-mono); font-size:.7rem; letter-spacing:.06em; text-transform:uppercase; color:var(--text-soft); border-top:1px solid var(--line); padding-top:.9rem; }
.portfolio-card__meta b{ color:var(--ink); }

/* industries */
.industry-card{ background:var(--ink); color:#fff; padding:2.2rem 1.8rem; position:relative; overflow:hidden; }
.industry-card h3{ color:#fff; }
.industry-card p{ color:#B9C4D2; }
.industry-card .idx{ font-family:var(--f-mono); font-size:.72rem; color:var(--trade-flow); letter-spacing:.14em; }

/* forms */
.form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1.2rem; }
@media (max-width:700px){ .form-grid{ grid-template-columns:1fr; } }
.field{ display:flex; flex-direction:column; gap:.5rem; }
.field.full{ grid-column:1 / -1; }
.field label{ font-family:var(--f-mono); font-size:.7rem; letter-spacing:.1em; text-transform:uppercase; color:var(--ink); }
.field label .req{ color:var(--trade-fire); }
.field input, .field select, .field textarea{
  font-family:var(--f-body); font-size:.95rem; padding:.85em 1em; border:1px solid var(--line); background:#fff; color:var(--text);
  transition:border-color .25s;
}
.field input:focus, .field select:focus, .field textarea:focus{ border-color:var(--trade-flow); outline:none; }
.field textarea{ resize:vertical; min-height:120px; }

.contact-card{ display:flex; gap:1rem; align-items:flex-start; padding:1.6rem 0; border-bottom:1px solid var(--line); }
.contact-card:last-child{ border-bottom:none; }
.contact-card .ic{ width:40px; height:40px; border-radius:8px; background:var(--trade-flow); color:#fff; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.contact-card b{ display:block; color:var(--ink); font-family:var(--f-mono); font-size:.7rem; letter-spacing:.1em; text-transform:uppercase; margin-bottom:.3rem; }

.map-placeholder{
  height:320px; border:1px dashed var(--line); display:flex; align-items:center; justify-content:center; flex-direction:column; gap:.6rem;
  background:repeating-linear-gradient(45deg, var(--paper-dim), var(--paper-dim) 10px, var(--paper) 10px, var(--paper) 20px);
  color:var(--text-soft); font-family:var(--f-mono); font-size:.75rem; letter-spacing:.08em; text-transform:uppercase;
}

/* logo strip */
.logo-strip{ display:flex; flex-wrap:wrap; gap:2.4rem; align-items:center; justify-content:space-between; opacity:.75; }
.logo-strip span{ font-family:var(--f-mono); font-size:.85rem; letter-spacing:.05em; color:var(--text-soft); border:1px solid var(--line); padding:.6em 1.1em; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{ background:var(--ink); color:#B9C4D2; padding-top:clamp(48px,7vw,80px); }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:2.5rem; padding-bottom:3rem; border-bottom:1px solid rgba(255,255,255,.14); }
@media (max-width:900px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-grid h4{ color:#fff; font-size:.85rem; letter-spacing:.1em; margin-bottom:1.1rem; }
.footer-grid li{ margin-bottom:.6rem; }
.footer-grid a{ color:#B9C4D2; font-size:.92rem; transition:color .2s; }
.footer-grid a:hover{ color:var(--trade-flow); }
.footer-brand{ display:flex; align-items:center; gap:.7rem; margin-bottom:1rem; }
.footer-brand img{ height:40px; width:40px; border-radius:8px; }
.footer-brand strong{ font-family:var(--f-display); color:#fff; font-size:1.2rem; }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; padding:1.6rem 0; flex-wrap:wrap; gap:1rem; font-family:var(--f-mono); font-size:.72rem; letter-spacing:.05em; color:#7E90A5; }
.footer-social{ display:flex; gap:.8rem; }
.footer-social a{ width:36px; height:36px; border:1px solid rgba(255,255,255,.2); border-radius:50%; display:flex; align-items:center; justify-content:center; transition:.25s; }
.footer-social a:hover{ background:var(--trade-flow); border-color:var(--trade-flow); }

/* ==========================================================================
   WHATSAPP FLOATING BUTTON
   ========================================================================== */
.wa-float{
  position:fixed; right:24px; bottom:24px; z-index:900;
  width:60px; height:60px; border-radius:50%; background:#25D366;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 10px 30px rgba(37,211,102,.45);
  animation:wa-pulse 2.6s infinite;
  transition:transform .3s;
}
.wa-float:hover{ transform:scale(1.08); }
.wa-float svg{ width:30px; height:30px; fill:#fff; }
@keyframes wa-pulse{
  0%{ box-shadow:0 0 0 0 rgba(37,211,102,.55); }
  70%{ box-shadow:0 0 0 16px rgba(37,211,102,0); }
  100%{ box-shadow:0 0 0 0 rgba(37,211,102,0); }
}
.wa-tooltip{
  position:fixed; right:94px; bottom:38px; z-index:900;
  background:#fff; padding:.6em 1em; border-radius:6px; box-shadow:0 8px 24px rgba(0,0,0,.18);
  font-family:var(--f-mono); font-size:.72rem; letter-spacing:.04em; color:var(--ink);
  opacity:0; pointer-events:none; transition:opacity .3s, transform .3s; transform:translateX(8px);
  white-space:nowrap;
}
.wa-float:hover + .wa-tooltip, .wa-tooltip.is-shown{ opacity:1; transform:translateX(0); }
@media (max-width:600px){ .wa-tooltip{ display:none; } .wa-float{ width:54px; height:54px; right:16px; bottom:16px; } }

/* utility */
.mt-0{ margin-top:0; } .center{ text-align:center; margin-inline:auto; }
.text-invert{ color:#fff; }
::selection{ background:var(--trade-flow); color:#fff; }