:root{
  --ink:#080d12;
  --ink2:#0f1720;
  --ink3:#16222c;
  --paper:#f2f5f5;
  --paper2:#e7ecec;
  --white:#fff;
  --blue:#1967ff;
  --cyan:#6edbff;
  --ice:#d8f4ff;
  --orange:#ff7848;
  --steel:#8f9da5;
  --text:#10171c;
  --muted:#66747c;
  --line:rgba(16,23,28,.14);
  --lightline:rgba(255,255,255,.14);
  --max:1260px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--paper);color:var(--text);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
img{display:block;width:100%}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
section{padding:108px 0}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{letter-spacing:-.048em}
h1{font-size:clamp(3.9rem,8.2vw,8.6rem);line-height:.84;font-weight:625}
h2{font-size:clamp(2.55rem,5vw,5.1rem);line-height:.94;font-weight:610}
h3{font-size:clamp(1.38rem,2vw,2rem);line-height:1.06;font-weight:600}
p{line-height:1.67}
.muted{color:var(--muted)}
.kicker{font-size:.7rem;letter-spacing:.17em;text-transform:uppercase;color:var(--muted);font-weight:780}
.eyebrow{display:flex;align-items:center;gap:10px;font-size:.72rem;letter-spacing:.17em;text-transform:uppercase;font-weight:780}
.eyebrow:before{content:"";width:27px;height:2px;background:var(--cyan)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:11px;min-height:52px;padding:0 23px;border-radius:999px;border:1px solid transparent;font-weight:620;transition:.25s}
.btn:hover{transform:translateY(-2px)}
.btn-blue{background:var(--blue);color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-ice{background:var(--ice);color:var(--ink)}
.btn-ghost{border-color:rgba(255,255,255,.34);color:#fff;background:rgba(255,255,255,.035);backdrop-filter:blur(8px)}
.btn-outline{border-color:var(--text);color:var(--text)}
.arrow{transition:.25s}.btn:hover .arrow{transform:translate(3px,-3px)}

.site-header{position:absolute;inset:0 0 auto;z-index:80;color:#fff}
.nav-shell{height:94px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;border-bottom:1px solid rgba(255,255,255,.14)}
.brand{justify-self:start;display:flex;align-items:center;gap:13px}
.brand-mark{width:42px;height:42px;position:relative}
.brand-mark:before{content:"";position:absolute;inset:2px;border:1.5px solid rgba(255,255,255,.8);border-radius:50%}
.brand-mark:after{content:"D";position:absolute;inset:0;display:grid;place-items:center;font-size:1.23rem;font-weight:800;color:var(--cyan);transform:translateX(1px)}
.brand-mark i{position:absolute;left:19px;top:1px;width:2px;height:40px;background:var(--blue);transform:rotate(42deg);transform-origin:center}
.brand-copy{display:grid;line-height:1}
.brand-copy strong{font-size:1rem;font-weight:690;letter-spacing:.1em}
.brand-copy span{font-size:.54rem;letter-spacing:.18em;margin-top:5px;color:#b8c8d0;text-transform:uppercase}
.nav-links{display:flex;gap:30px;align-items:center;justify-content:center;font-size:.91rem;font-weight:440}
.nav-links>a,.nav-dropdown-trigger{opacity:.82;position:relative}
.nav-links>a:hover,.nav-links>a.active,.nav-dropdown:hover .nav-dropdown-trigger,.nav-dropdown.active .nav-dropdown-trigger{opacity:1}
.nav-links>a.active:after,.nav-dropdown.active>.nav-dropdown-trigger:after{content:"";position:absolute;left:0;right:0;bottom:-14px;height:2px;background:var(--cyan)}
.nav-actions{justify-self:end;display:flex;align-items:center;gap:11px}
.nav-phone{font-size:.84rem;opacity:.84}
.menu-btn{display:none;background:none;border:0;color:#fff;font-size:1.58rem}
.mobile-panel{display:none}

.nav-dropdown{position:relative;display:flex;align-items:center;padding-bottom:8px;margin-bottom:-8px}
.nav-dropdown:after{content:"";position:absolute;left:-24px;right:-24px;top:100%;height:19px;background:transparent}
.nav-dropdown-trigger{background:none;border:0;color:inherit;font:inherit;padding:14px 0;display:flex;align-items:center;gap:7px}
.nav-dropdown-trigger span{display:inline-block;transition:.2s}
.nav-dropdown-menu{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translate(-50%,-6px);
  min-width:295px;background:#fff;color:var(--ink);border:1px solid rgba(0,0,0,.08);
  border-radius:16px;padding:9px;box-shadow:0 24px 65px rgba(0,0,0,.22);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .18s ease,transform .18s ease,visibility 0s linear .3s;
}
.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu,.nav-dropdown.open .nav-dropdown-menu{
  opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0);transition-delay:0s
}
.nav-dropdown:hover .nav-dropdown-trigger span,.nav-dropdown:focus-within .nav-dropdown-trigger span,.nav-dropdown.open .nav-dropdown-trigger span{transform:rotate(180deg)}
.nav-dropdown-menu a{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:13px;border-radius:10px;font-size:.84rem;font-weight:680}
.nav-dropdown-menu a:hover,.nav-dropdown-menu a.active{background:#edf5ff;color:var(--blue)}
.nav-dropdown-menu small{display:block;font-size:.57rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-top:3px}

.hero{
  min-height:100svh;color:#fff;position:relative;overflow:hidden;
  background:
    linear-gradient(90deg,rgba(5,10,14,.98) 0%,rgba(5,10,14,.86) 43%,rgba(5,10,14,.3) 100%),
    url(https://dithorishoengineering.co.za/wp-content/uploads/2023/08/air-ventilation-flow-system-2022-10-19-05-09-16-utc-1-scaled.jpg.webp) center/cover;
}
.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.16),transparent 40%,rgba(0,0,0,.3))}
.hero:after{content:"";position:absolute;inset:auto 0 0;height:220px;background:linear-gradient(transparent,rgba(0,0,0,.65))}
.hero-grid{min-height:100svh;position:relative;z-index:2;display:grid;grid-template-columns:1.14fr .58fr;gap:72px;align-items:end;padding:168px 0 122px}
.hero-copy{max-width:930px}
.hero-copy h1{margin:25px 0 30px}
.hero-copy h1 em{font-style:normal;color:var(--cyan)}
.hero-copy p{font-size:1.12rem;max-width:700px;color:#d2dde3}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:35px}
.hero-card{border:1px solid rgba(255,255,255,.15);background:rgba(8,15,20,.86);backdrop-filter:blur(18px);border-radius:24px;padding:27px}
.hero-card-top{display:flex;justify-content:space-between;gap:20px;align-items:center;padding-bottom:17px;border-bottom:1px solid rgba(255,255,255,.13)}
.hero-card-top strong{font-weight:560}.hero-card-top small{font-size:.65rem;letter-spacing:.13em;text-transform:uppercase;color:var(--cyan)}
.hero-card h3{font-size:1.55rem;margin:22px 0 13px}
.hero-routes{display:grid}
.hero-routes a{display:grid;grid-template-columns:35px 1fr auto;gap:12px;align-items:center;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.hero-routes a:last-child{border-bottom:0}.hero-routes .n{font-size:.64rem;color:var(--cyan)}
.hero-routes .go{transition:.2s}.hero-routes a:hover .go{transform:translateX(4px);color:var(--cyan)}
.hero-bar{position:absolute;z-index:4;bottom:0;left:0;right:0;background:rgba(4,8,11,.48);backdrop-filter:blur(9px);border-top:1px solid rgba(255,255,255,.13)}
.hero-bar-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.hero-stat{padding:18px 22px;border-right:1px solid rgba(255,255,255,.13)}
.hero-stat:first-child{padding-left:0}.hero-stat:last-child{border-right:0}
.hero-stat b{display:block;font-size:1.22rem;font-weight:570}.hero-stat span{font-size:.61rem;text-transform:uppercase;letter-spacing:.12em;color:#afbdc4}

.system-strip{background:var(--blue);color:#fff;overflow:hidden}
.system-track{display:flex;width:max-content;animation:scroll 27s linear infinite}
.system-track span{display:flex;align-items:center;gap:28px;padding:16px 0;font-size:.71rem;letter-spacing:.15em;text-transform:uppercase;font-weight:800}
.system-track span:after{content:"×";margin:0 27px;color:var(--cyan);font-size:1rem}
@keyframes scroll{to{transform:translateX(-50%)}}

.split-head{display:grid;grid-template-columns:.82fr 1.18fr;gap:82px;align-items:end;margin-bottom:58px}
.split-head p{max-width:645px;margin-left:auto}
.discipline-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.discipline{background:#fff;border:1px solid var(--line);border-radius:23px;overflow:hidden;min-height:470px;display:flex;flex-direction:column;transition:.28s}
.discipline:hover{transform:translateY(-5px);box-shadow:0 24px 60px rgba(10,30,45,.09)}
.discipline-image{height:220px;overflow:hidden}
.discipline-image img{width:100%;height:100%;object-fit:cover;transition:.6s}
.discipline:hover img{transform:scale(1.035)}
.discipline-copy{padding:25px;display:flex;flex-direction:column;flex:1}
.discipline-copy small{font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);font-weight:800}
.discipline-copy h3{font-size:1.75rem;margin:12px 0 9px}
.discipline-copy p{font-size:.92rem;color:var(--muted)}
.discipline-copy .link{margin-top:auto;border-top:1px solid var(--line);padding-top:16px;display:flex;justify-content:space-between;font-size:.84rem;font-weight:700}

.dark{background:var(--ink);color:#fff}.dark .muted{color:#aebbc1}
.lifecycle-grid{display:grid;grid-template-columns:.87fr 1.13fr;gap:16px}
.lifecycle-visual{min-height:660px;border-radius:28px;overflow:hidden;position:relative;background:url(https://dithorishoengineering.co.za/wp-content/uploads/2023/08/shot-of-a-team-of-young-colleagues-using-a-digital-2022-10-04-00-10-00-utc-scaled.jpg.webp) center/cover}
.lifecycle-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 34%,rgba(4,10,14,.94))}
.lifecycle-caption{position:absolute;z-index:2;left:0;right:0;bottom:0;padding:31px}
.lifecycle-caption small{font-size:.65rem;text-transform:uppercase;letter-spacing:.14em;color:var(--cyan)}
.lifecycle-caption h3{font-size:2.55rem;margin:10px 0 0}
.lifecycle-list{display:grid;gap:12px}
.lifecycle-item{padding:24px 27px;border:1px solid rgba(255,255,255,.13);border-radius:20px;background:#101820;display:grid;grid-template-columns:46px 1fr auto;gap:15px;align-items:start}
.lifecycle-item .n{font-size:.65rem;color:var(--cyan);padding-top:5px}
.lifecycle-item h3{margin:0 0 7px}.lifecycle-item p{margin:0;color:#aebbc1}.lifecycle-item .icon{color:var(--orange)}

.projects-section{background:var(--paper2)}
.case-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
.case-feature{background:var(--ink);color:#fff;border-radius:28px;padding:35px;min-height:555px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.case-feature:after{content:"";position:absolute;right:-150px;bottom:-170px;width:450px;height:450px;border-radius:50%;border:1px solid rgba(110,219,255,.18);box-shadow:0 0 0 70px rgba(25,103,255,.04)}
.case-feature>*{position:relative;z-index:2}
.case-label{font-size:.65rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);font-weight:800}
.case-feature h3{font-size:3rem;max-width:690px;margin:18px 0}
.case-feature p{color:#aebbc1;max-width:690px}
.case-meta{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--lightline);margin-top:35px}
.case-meta div{padding:18px 20px 0 0;border-right:1px solid var(--lightline)}.case-meta div:not(:first-child){padding-left:20px}.case-meta div:last-child{border-right:0}
.case-meta small{display:block;font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;color:#788b95}.case-meta strong{display:block;margin-top:7px;font-weight:560}
.case-stack{display:grid;gap:14px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:27px;min-height:170px}
.case-card small{font-size:.63rem;letter-spacing:.13em;text-transform:uppercase;color:var(--blue);font-weight:800}
.case-card h3{font-size:1.55rem;margin:14px 0 8px}.case-card p{font-size:.88rem;color:var(--muted);margin-bottom:0}

.credibility{background:#fff}
.cred-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:70px;align-items:start}
.cred-card{background:#08111a;color:#fff;border-radius:28px;padding:34px}
.cred-card .label{font-size:.65rem;text-transform:uppercase;letter-spacing:.14em;color:var(--cyan);font-weight:800}
.cred-card h3{font-size:2.45rem;margin:15px 0}
.cred-row{display:grid;grid-template-columns:170px 1fr;gap:20px;padding:17px 0;border-top:1px solid rgba(255,255,255,.13)}
.cred-row small{font-size:.62rem;text-transform:uppercase;letter-spacing:.12em;color:#7c909b}
.cred-row strong{font-weight:570}
.cred-note{font-size:.76rem;color:#7f929c;margin-top:18px}
.proof-list{border-top:1px solid var(--line)}
.proof-item{display:grid;grid-template-columns:48px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}
.proof-item .n{font-size:.65rem;color:var(--blue);padding-top:4px}
.proof-item h3{margin:0 0 7px}.proof-item p{margin:0;color:var(--muted)}

.cta-section{padding:90px 0}
.cta-box{background:var(--blue);color:#fff;border-radius:31px;padding:56px;display:grid;grid-template-columns:1.08fr .92fr;gap:60px;align-items:end;position:relative;overflow:hidden}
.cta-box:after{content:"";position:absolute;right:-120px;top:-190px;width:480px;height:480px;border:1px solid rgba(255,255,255,.18);border-radius:50%;box-shadow:0 0 0 75px rgba(255,255,255,.035)}
.cta-box>*{position:relative;z-index:2}
.cta-box p{color:rgba(255,255,255,.78);max-width:590px}.cta-actions{display:flex;gap:10px;flex-wrap:wrap}

.page-hero{padding:188px 0 92px;background:var(--ink);color:#fff;position:relative;overflow:hidden}
.page-hero:after{content:"";position:absolute;right:-130px;top:30px;width:580px;height:580px;border:1px solid rgba(110,219,255,.16);border-radius:50%;box-shadow:0 0 0 88px rgba(25,103,255,.025),0 0 0 176px rgba(255,120,72,.012)}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:clamp(3.5rem,7.2vw,7.35rem);max-width:1100px;margin:24px 0 0}
.page-lead{font-size:1.14rem;color:#b6c3c9;max-width:780px;margin-top:28px}

.detail{border-bottom:1px solid var(--line)}
.detail-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:82px}
.detail-grid h2{font-size:3.2rem}
.detail-list{border-top:1px solid var(--line)}
.detail-row{display:grid;grid-template-columns:205px 1fr;gap:28px;padding:20px 0;border-bottom:1px solid var(--line)}
.detail-row small{font-size:.65rem;text-transform:uppercase;letter-spacing:.12em;color:var(--muted)}
.detail-row strong{font-weight:560}

.visual-split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.visual-image{min-height:600px;border-radius:27px;overflow:hidden;position:relative;background:#222}
.visual-image img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.visual-image:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(0,0,0,.44))}
.visual-copy{display:flex;justify-content:center;flex-direction:column;padding:52px}.visual-copy p{color:var(--muted)}

.project-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.project-card{background:#fff;border:1px solid var(--line);border-radius:23px;padding:29px;min-height:300px}
.project-card small{font-size:.64rem;text-transform:uppercase;letter-spacing:.13em;color:var(--blue);font-weight:800}
.project-card h3{font-size:1.75rem;margin:25px 0 10px}.project-card p{color:var(--muted);font-size:.92rem}
.project-card .value{margin-top:20px;border-top:1px solid var(--line);padding-top:15px;font-weight:700}

.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px}
.principle-list{border-top:1px solid var(--line)}
.principle{padding:22px 0;border-bottom:1px solid var(--line)}
.principle small{display:block;font-size:.65rem;letter-spacing:.13em;text-transform:uppercase;color:var(--blue);margin-bottom:7px}
.principle strong{font-weight:570}
.leader-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.leader{background:#fff;border:1px solid var(--line);border-radius:23px;padding:28px}
.leader small{font-size:.64rem;text-transform:uppercase;letter-spacing:.13em;color:var(--blue);font-weight:800}
.leader h3{margin:20px 0 6px}.leader p{color:var(--muted);font-size:.9rem}

.contact-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:80px}
.contact-card{background:var(--ink);color:#fff;border-radius:25px;padding:34px;position:sticky;top:30px}
.contact-card h3{margin-top:14px}
.contact-line{padding:20px 0;border-bottom:1px solid var(--lightline)}
.contact-line small{display:block;color:#8498a2;font-size:.65rem;text-transform:uppercase;letter-spacing:.13em;margin-bottom:7px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:grid;gap:7px}.field.full{grid-column:1/-1}
.field label{font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.field input,.field select,.field textarea{border:1px solid var(--line);background:#fafcfc;border-radius:12px;padding:15px 14px;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue)}
.field textarea{min-height:155px;resize:vertical}
.form-note{font-size:.8rem;color:var(--muted)}

.footer{background:#04080b;color:#fff;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.15fr .72fr .78fr .95fr;gap:50px}
.footer .brand{margin-bottom:20px}.footer p{font-size:.9rem;color:#83939b;max-width:360px}
.footer h4{font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:#74868f;margin:0 0 18px}
.footer a{display:block;margin:10px 0;color:#d0d9de;font-size:.91rem}.footer a:hover{color:var(--cyan)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:46px;padding-top:28px;border-top:1px solid rgba(255,255,255,.1);font-size:.74rem;color:#73838b}
.reveal{opacity:0;transform:translateY(22px);transition:.65s ease}.reveal.in{opacity:1;transform:none}

@media(max-width:1100px){.discipline-grid{grid-template-columns:1fr 1fr}}
@media(max-width:980px){
  .container{width:min(var(--max),calc(100% - 34px))}
  .nav-shell{grid-template-columns:1fr auto}.nav-links,.nav-phone,.nav-actions .btn{display:none}.menu-btn{display:block}
  .mobile-panel{position:fixed;inset:0;z-index:100;background:var(--ink);color:#fff;padding:28px;display:none;overflow:auto}.mobile-panel.open{display:block}
  .mobile-top{display:flex;justify-content:space-between;align-items:center}.close-menu{background:none;border:0;color:#fff;font-size:2rem}
  .mobile-links{display:grid;gap:20px;margin-top:65px}.mobile-links>a{font-size:2rem;letter-spacing:-.04em}
  .mobile-sub{display:grid;gap:10px;padding-left:18px;border-left:1px solid rgba(255,255,255,.15)}.mobile-sub a{font-size:1.08rem;color:#b9c9d1}
  .mobile-contact{margin-top:45px;padding-top:27px;border-top:1px solid var(--lightline)}
  .hero-grid{grid-template-columns:1fr;gap:34px;padding:140px 0 185px}.hero-card{max-width:650px}
  .hero-bar-grid{grid-template-columns:1fr 1fr}.hero-stat:nth-child(2){border-right:0}
  .split-head,.lifecycle-grid,.case-grid,.cred-grid,.cta-box,.detail-grid,.visual-split,.about-grid,.contact-grid{grid-template-columns:1fr;gap:42px}
  .project-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  section{padding:76px 0}.container{width:calc(100% - 28px)}
  .nav-shell{height:74px}.brand-copy strong{font-size:.92rem}.brand-mark{width:34px;height:34px}
  .hero-grid{padding:112px 0 196px}.hero-copy h1{font-size:clamp(3.5rem,15vw,6rem)}.hero-copy p{font-size:1rem}
  .hero-actions .btn{width:100%}.hero-card{padding:20px}
  .hero-stat{padding:13px 8px}.hero-stat b{font-size:1rem}.hero-stat span{font-size:.53rem}
  .split-head{margin-bottom:35px}.discipline-grid{grid-template-columns:1fr}
  .lifecycle-visual{min-height:430px}.lifecycle-item{grid-template-columns:34px 1fr auto}
  .case-meta{grid-template-columns:1fr}.case-meta div,.case-meta div:not(:first-child){padding:14px 0;border-right:0;border-bottom:1px solid var(--lightline)}
  .cred-row,.detail-row{grid-template-columns:1fr;gap:6px}
  .cta-box{padding:31px 24px}.page-hero{padding:132px 0 65px}.detail-grid h2{font-size:2.5rem}
  .visual-image{min-height:400px}.visual-copy{padding:15px 0}
  .leader-grid{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}
  .footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}
}