:root{--ac-bg:#101210;--ac-panel:#181b18;--ac-panel-2:#20231f;--ac-paper:#e9e5db;--ac-ink:#f1ede5;--ac-dark:#20231f;--ac-muted:#aaa79e;--ac-line:#41443d;--ac-warm:#c6a071}
.site-header{background:#ebe7dc;border-bottom:1px solid #c9c3b8}.header-inner{min-height:68px}.brand{height:52px}.brand img{width:48px;height:48px}.site-nav{gap:16px}.site-nav .nav-cta{padding:12px 15px}
.ac-home{overflow:hidden;background:var(--ac-bg);color:var(--ac-ink)}.ac-home *{box-sizing:border-box}.ac-home h1,.ac-home h2,.ac-home h3,.ac-home p,.ac-home figure{margin:0}.ac-kicker{color:var(--ac-warm);font-size:11px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.ac-button{display:inline-flex;min-height:54px;align-items:center;justify-content:center;gap:26px;padding:14px 21px;border:1px solid transparent;border-radius:2px;font-size:12px;font-weight:800;text-decoration:none;transition:transform .2s ease,background-color .2s ease,border-color .2s ease}.ac-button:hover{transform:translateY(-2px)}.ac-button-primary{color:#171814;background:var(--ac-warm)}.ac-button-primary:hover{background:#d6b586}.ac-button-secondary{color:var(--ac-ink);border-color:#5b5e56}.ac-button-secondary:hover{border-color:#999b92}
.ac-hero{padding:54px 0 58px;background:#0d0f0d}.ac-hero-grid{display:grid;grid-template-columns:.84fr 1.16fr;gap:58px;align-items:center}.ac-hero-copy{position:relative;z-index:1}.ac-hero h1{max-width:660px;margin-top:23px;font-size:clamp(62px,6vw,91px);line-height:.94;letter-spacing:-.062em}.ac-hero h1 em{color:var(--ac-warm);font-style:normal}.ac-lead{max-width:660px;margin-top:28px!important;color:#d3d0c8;font-size:18px;line-height:1.58}.ac-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}.ac-tertiary{display:inline-flex;gap:25px;margin-top:24px;color:#bab7ae;font-size:11px;font-weight:700;text-decoration:none}.ac-hero-media{position:relative;min-height:590px;overflow:hidden;border-left:1px solid var(--ac-line);background:#111311}.ac-hero-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center}.ac-hero-media figcaption{position:absolute;right:20px;bottom:18px;padding:10px 12px;color:#e0ddd5;background:rgba(13,15,13,.88);font-size:11px;font-weight:700}
.ac-services{padding:92px 0 98px;background:var(--ac-paper);color:var(--ac-dark)}.ac-section-head{display:grid;grid-template-columns:1.4fr .6fr;gap:80px;align-items:end}.ac-section-head h2,.ac-deliverables h2,.ac-final h2{max-width:850px;margin-top:15px;font-size:clamp(44px,5vw,68px);line-height:1;letter-spacing:-.055em}.ac-section-head>p{max-width:410px;color:#676860;font-size:15px;line-height:1.6}.ac-service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;margin-top:48px;background:#a9a69d;border:1px solid #a9a69d}.ac-service-card{display:grid;grid-template-columns:.82fr 1.18fr;min-height:365px;background:#f1eee6}.ac-service-visual{min-height:365px;background-color:#171a18;background-repeat:no-repeat;transition:filter .2s ease}.ac-service-card:hover .ac-service-visual{filter:contrast(1.06)}.ac-visual-design{background-image:url("../img/hero.jpg");background-position:54% center;background-size:cover}.ac-visual-fea{background-image:url("../img/arenith-consultancy-hero-v3.png");background-position:72% center;background-size:auto 100%}.ac-visual-check{background-image:url("../img/arenith-third-party-check-v3.png");background-position:center;background-size:cover}.ac-visual-automation{background-image:url("../img/arenith-engineering-automation-v3.png");background-position:center;background-size:cover}.ac-service-body{display:flex;min-width:0;flex-direction:column;padding:29px}.ac-service-body>span{color:#8a704f;font:700 10px monospace}.ac-service-body h3{margin-top:44px;font-size:27px;line-height:1.08;letter-spacing:-.035em}.ac-service-body p{margin-top:18px;color:#64655f;font-size:14px;line-height:1.56}.ac-service-body a{display:flex;justify-content:space-between;margin-top:auto;padding-top:26px;border-top:1px solid #c5c1b8;color:#242620;font-size:11px;font-weight:800;text-decoration:none}.ac-service-body a b{color:#8a704f}
.ac-visual-design{background-image:url("../img/arenith-structural-design-v4.png");background-position:center;background-size:cover}.ac-visual-fea{background-image:url("../img/arenith-real-fe-local-joint.png");background-position:center;background-size:cover;background-color:#fff}.ac-visual-check{background-image:url("../img/arenith-third-party-check-v4.png");background-position:center;background-size:cover}.ac-visual-automation{position:relative;background-image:url("../img/arenith-engineering-automation-v4.png");background-position:center;background-size:cover}.ac-workflow-labels{display:none}.ac-workflow-sequence{margin-top:14px;color:#725a3f;font-size:12px;font-weight:800;line-height:1.5}.ac-workflow-sequence b{color:#a17d51}.ac-deliverables{padding:92px 0;background:#181b18}.ac-deliverables h2,.ac-final h2{color:#f1ede5}.ac-deliverables-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:110px;align-items:center}.ac-deliverables-copy>p:last-child{max-width:500px;margin-top:24px!important;color:#c4c1b9;font-size:15px;line-height:1.6}.ac-output-board{display:grid;grid-template-columns:.7fr 1.3fr;min-height:455px;border:1px solid #5d6158;background:#121411}.ac-output-model{position:relative;min-height:455px;overflow:hidden;border-right:1px solid #5d6158;background:linear-gradient(#2e312b 1px,transparent 1px),linear-gradient(90deg,#2e312b 1px,transparent 1px);background-size:44px 44px}.ac-output-model:before,.ac-output-model:after{content:"";position:absolute;left:17%;width:66%;border:1px solid #9cabb1;transform:skewY(-9deg)}.ac-output-model:before{top:23%;height:45%}.ac-output-model:after{top:35%;height:45%;transform:skewY(9deg)}.ac-output-model i{position:absolute;top:19%;bottom:17%;width:1px;background:#9cabb1}.ac-output-model i:nth-child(1){left:18%}.ac-output-model i:nth-child(2){left:31%}.ac-output-model i:nth-child(3){left:44%}.ac-output-model i:nth-child(4){left:57%}.ac-output-model i:nth-child(5){left:70%}.ac-output-model i:nth-child(6){left:83%}.ac-output-board ol{margin:0;padding:0;list-style:none}.ac-output-board li{display:flex;min-height:91px;align-items:center;gap:23px;padding:18px 24px;border-bottom:1px solid #44483f;color:#f1ede5;font-size:16px;font-weight:700}.ac-output-board li:last-child{border-bottom:0}.ac-output-board li span{color:#d8b783;font:700 10px monospace}
.ac-tools{padding:92px 0 98px;background:#242720}.ac-tools-head h2{color:var(--ac-ink)}.ac-tools-head>p{color:#aaa9a1}.ac-tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin-top:46px;background:#565951;border:1px solid #565951}.ac-tool-card{position:relative;display:flex;min-height:450px;flex-direction:column;padding:34px;color:var(--ac-ink);background:#181b18;text-decoration:none;transition:background-color .2s ease}.ac-tool-card:hover{background:#1e211d}.ac-tool-index{color:var(--ac-warm);font:700 10px monospace;text-transform:uppercase}.ac-tool-card h3{max-width:510px;margin-top:42px;font-size:34px;line-height:1.05;letter-spacing:-.04em}.ac-tool-card p{max-width:540px;margin-top:18px;color:#aaa9a1;font-size:14px;line-height:1.6}.ac-tool-card strong{display:flex;justify-content:space-between;margin-top:auto;padding-top:22px;border-top:1px solid #41443d;font-size:11px}.ac-section-shapes{display:flex;height:92px;align-items:center;gap:20px;margin-top:39px;color:#90a6af}.ac-section-shapes i{display:grid;width:54px;height:54px;place-items:center;border:1px solid #66777e;font:700 28px Georgia,serif}.ac-beam-mark{position:relative;height:92px;margin-top:39px}.ac-beam-mark i{position:absolute;top:28px;left:0;width:72%;height:4px;background:#91a7b0}.ac-beam-mark b,.ac-beam-mark span{position:absolute;top:32px;width:0;height:0;border-right:18px solid transparent;border-bottom:28px solid #7f6950;border-left:18px solid transparent}.ac-beam-mark b{left:4%}.ac-beam-mark span{left:63%}.ac-beam-mark:after{content:"";position:absolute;top:0;left:34%;height:28px;border-left:2px solid var(--ac-warm)}

.ac-tool-card h3{color:#f1eee5}.ac-tool-proof{display:grid;grid-template-columns:110px 1fr;gap:16px;margin-top:22px;padding-top:18px;border-top:1px solid #363a34;color:#d9d7cf;font-size:12px;line-height:1.5}.ac-tool-proof span{color:var(--ac-warm);font:700 9px monospace;letter-spacing:.08em;text-transform:uppercase}.ac-tools-bridge{display:grid;grid-template-columns:1.05fr 1fr auto;align-items:center;gap:52px;margin-top:28px;padding:36px 38px;border:1px solid #5c6056;background:#111310}.ac-tools-bridge h3{max-width:460px;margin-top:8px;color:#f1eee5;font-size:30px;line-height:1.05;letter-spacing:-.035em}.ac-tools-bridge ul{display:grid;grid-template-columns:1fr 1fr;gap:12px 26px;margin:0;padding:0;list-style:none}.ac-tools-bridge li{position:relative;padding-left:17px;color:#c2c1b9;font-size:12px;line-height:1.4}.ac-tools-bridge li:before{position:absolute;top:.45em;left:0;width:6px;height:6px;background:var(--ac-warm);content:""}.ac-tools-bridge .ac-button{white-space:nowrap}
.ac-final{padding:94px 0;background:#0d0f0d}.ac-final-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:90px;align-items:end}.ac-final-grid .ac-button{justify-self:end}
@media(max-width:1050px){.ac-hero-grid,.ac-deliverables-grid{grid-template-columns:1fr}.ac-hero-media{min-height:520px}.ac-service-card{grid-template-columns:1fr}.ac-service-visual{min-height:250px}.ac-deliverables-grid{gap:46px}}
@media(max-width:760px){.ac-hero{padding:45px 0 50px}.ac-hero h1{font-size:54px}.ac-lead{font-size:16px}.ac-actions{display:grid}.ac-button{width:100%}.ac-hero-media{min-height:380px;margin-top:8px;border-left:0}.ac-hero-media img{object-position:64% center}.ac-hero-media figcaption{right:12px;bottom:12px;left:12px}.ac-services,.ac-deliverables,.ac-tools,.ac-final{padding:66px 0}.ac-section-head,.ac-final-grid{grid-template-columns:1fr;gap:25px}.ac-section-head h2,.ac-deliverables h2,.ac-final h2{font-size:42px}.ac-service-grid,.ac-tool-grid{grid-template-columns:1fr}.ac-service-card{min-height:0}.ac-service-visual{min-height:235px}.ac-service-body{min-height:300px;padding:25px}.ac-service-body h3{margin-top:30px;font-size:25px}.ac-output-board{grid-template-columns:1fr}.ac-output-model{min-height:280px;border-right:0;border-bottom:1px solid #4b4e46}.ac-output-board li{min-height:76px;padding:15px 18px;font-size:14px}.ac-tool-card{min-height:410px;padding:27px}.ac-tool-card h3{font-size:29px}.ac-final-grid .ac-button{justify-self:stretch}}

@media(max-width:980px){.ac-tools-bridge{grid-template-columns:1fr 1fr}.ac-tools-bridge .ac-button{grid-column:1/-1;justify-self:start}}
@media(max-width:760px){.ac-tool-proof{grid-template-columns:1fr;gap:7px}.ac-tools-bridge{grid-template-columns:1fr;gap:28px;padding:28px 26px}.ac-tools-bridge h3{font-size:27px}.ac-tools-bridge ul{grid-template-columns:1fr}.ac-tools-bridge .ac-button{grid-column:auto;justify-self:stretch}}

/* Product-led tools showcase */
.ac-tools-head h2{color:#f1eee5}.ac-tool-grid{gap:18px;background:transparent;border:0}.ac-tool-card{min-height:720px;padding:38px;border:1px solid #565951;overflow:hidden}.ac-tool-card:hover{border-color:#9a8468;background:#1d201c}.ac-tool-card h3{min-height:88px;margin-top:24px;font-size:38px}.ac-tool-lead{min-height:68px;margin-top:14px!important;font-size:15px!important}.ac-product-preview{margin:28px 0 22px;border:1px solid #50554c;background:#0f110f}.ac-preview-bar{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid #3e433c;color:#aaa9a1;font:700 9px monospace;letter-spacing:.07em}.ac-preview-bar b{color:var(--ac-warm);font:inherit}.ac-search-demo{display:flex;align-items:center;justify-content:space-between;margin:16px;padding:13px 14px;border:1px solid #596058;background:#191c19;color:#a8aaa4;font-size:11px}.ac-search-demo i{font-style:normal}.ac-search-demo span{color:#d0b38a;font-size:18px}.ac-profile-row{display:grid;grid-template-columns:40px 1.2fr .9fr 1.1fr auto;align-items:center;gap:12px;padding:13px 16px;border-top:1px solid #343932}.ac-profile-shape{display:grid;width:32px;height:32px;place-items:center;border:1px solid #65727a;color:#a5b7bf;font:700 18px Georgia,serif}.ac-profile-row strong{display:grid;gap:4px}.ac-profile-row strong b{color:#e6e3db;font-size:10px}.ac-profile-row strong small{color:#7f827d;font:8px monospace;text-transform:uppercase}.ac-profile-row em{padding:7px 8px;border:1px solid #70604d;color:#cfaf86;font:700 8px monospace;font-style:normal}.ac-profile-row-muted{opacity:.63}.ac-beam-canvas{position:relative;height:154px;margin:0 16px;border-bottom:1px solid #343932;background:linear-gradient(#171a17 1px,transparent 1px),linear-gradient(90deg,#171a17 1px,transparent 1px);background-size:22px 22px}.ac-beam-line{position:absolute;top:78px;right:8%;left:8%;height:5px;background:#a7b7bd}.ac-load-arrow{position:absolute;top:27px;color:#d0ad7d;font:24px monospace}.ac-load-one{left:35%}.ac-load-two{left:62%}.ac-support{position:absolute;top:83px;width:0;height:0;border-right:14px solid transparent;border-bottom:22px solid #846f53;border-left:14px solid transparent}.ac-support-one{left:12%}.ac-support-two{right:12%}.ac-span-label{position:absolute;right:12%;bottom:12px;left:12%;border-top:1px solid #50554c;color:#7f827d;text-align:center;font:8px monospace;letter-spacing:.1em}.ac-result-tabs{display:grid;grid-template-columns:1fr 1fr 1.2fr;border-bottom:1px solid #343932}.ac-result-tabs>*{padding:11px 8px;border-right:1px solid #343932;color:#7f827d;text-align:center;font:700 8px monospace}.ac-result-tabs b{color:#d2b185}.ac-result-trace{display:flex;height:44px;align-items:flex-end;gap:0;padding:10px 16px}.ac-result-trace i{display:block;flex:1;border-top:2px solid #90a8b2;transform:skewY(-8deg)}.ac-result-trace i:nth-child(2),.ac-result-trace i:nth-child(3){height:12px;transform:skewY(8deg)}.ac-result-trace i:nth-child(4){height:5px}.ac-tool-benefits{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}.ac-tool-benefits span{padding:7px 10px;border:1px solid #4c5149;color:#c6c4bd;font:700 9px monospace;text-transform:uppercase}.ac-tool-card>strong{color:#f1eee5;font-size:12px}
@media(max-width:760px){.ac-tool-card{min-height:0;padding:27px}.ac-tool-card h3{min-height:0;font-size:32px}.ac-tool-lead{min-height:0}.ac-product-preview{margin-top:24px}.ac-profile-row{grid-template-columns:36px 1fr auto}.ac-profile-row strong:nth-of-type(2),.ac-profile-row strong:nth-of-type(3){display:none}.ac-result-tabs{grid-template-columns:1fr 1fr 1.25fr}.ac-result-tabs>*{padding:10px 3px;font-size:7px}}

/* Real product evidence */
.ac-tool-card{min-height:880px}.ac-tool-card h3{min-height:auto}.ac-real-tool-visual{position:relative;height:330px;margin:26px 0 24px;border:1px solid #565b53;overflow:hidden;background:#e9edf0}.ac-real-tool-visual img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .2s ease}.ac-tool-card:hover .ac-real-tool-visual img{transform:scale(1.015)}.ac-real-tool-visual span{position:absolute;right:0;bottom:0;left:0;padding:11px 14px;background:rgba(11,14,13,.9);color:#d4d2cb;font:700 9px monospace;letter-spacing:.05em;text-transform:uppercase}.ac-sections-real img{object-position:center 73%}.ac-beam-real img{object-position:center 13%}.ac-real-tool-features{display:grid;grid-template-columns:1fr 1fr;gap:0;margin:0 0 26px;padding:0;border-top:1px solid #3d423b;list-style:none}.ac-real-tool-features li{min-height:72px;padding:15px 16px 14px 0;border-bottom:1px solid #3d423b;color:#aeadA6;font-size:11px;line-height:1.45}.ac-real-tool-features li:nth-child(odd){border-right:1px solid #3d423b}.ac-real-tool-features li:nth-child(even){padding-left:16px}.ac-real-tool-features b{display:block;margin-bottom:5px;color:#d4b287;font:700 9px monospace;text-transform:uppercase}.ac-tool-card>strong{margin-top:auto}
@media(max-width:760px){.ac-tool-card{min-height:0}.ac-real-tool-visual{height:190px}.ac-sections-real img{object-position:center 82%}.ac-beam-real img{object-position:center 8%}.ac-real-tool-features{grid-template-columns:1fr}.ac-real-tool-features li,.ac-real-tool-features li:nth-child(even){min-height:0;padding:14px 0;border-right:0}}

/* Concise, interface-first tool cards */
.ac-tool-card{min-height:790px}.ac-sections-real img{position:absolute;bottom:0;left:-10%;width:120%;height:auto;max-width:none;object-fit:contain}.ac-real-tool-features{grid-template-columns:repeat(3,1fr)}.ac-real-tool-features li,.ac-real-tool-features li:nth-child(even){min-height:76px;padding:15px 14px;border-right:1px solid #3d423b}.ac-real-tool-features li:last-child{border-right:0}
@media(max-width:760px){.ac-tool-card{min-height:0}.ac-real-tool-visual{height:170px}.ac-sections-real img{left:-15%;width:130%;height:auto;object-fit:contain}.ac-real-tool-features{grid-template-columns:1fr}.ac-real-tool-features li,.ac-real-tool-features li:nth-child(even){min-height:0;padding:13px 0;border-right:0}}

/* Full promotional tool artwork */
.ac-tool-card{min-height:0}.ac-tool-card h3{margin-bottom:25px}.ac-real-tool-visual,.ac-sections-real,.ac-beam-real{height:auto;aspect-ratio:1;margin:0 0 26px;background:#061a31}.ac-real-tool-visual img,.ac-sections-real img,.ac-beam-real img{position:static;width:100%;height:100%;max-width:100%;object-fit:cover;object-position:center;transform:none}.ac-tool-card:hover .ac-real-tool-visual img{transform:none}.ac-real-tool-visual span{padding:10px 13px}.ac-tool-card>strong{margin-top:0}
@media(max-width:760px){.ac-real-tool-visual,.ac-sections-real,.ac-beam-real{height:auto;aspect-ratio:1}.ac-sections-real img,.ac-beam-real img{position:static;width:100%;height:100%;object-fit:cover}}
@media(prefers-reduced-motion:reduce){.ac-home *{transition:none!important}}

/* Genuine engineering imagery */
.ac-hero-media img{opacity:.82;filter:saturate(.82) contrast(1.04)}
.ac-hero-media figcaption{z-index:2}
.ac-visual-design{background-color:#f2f0ea;background-image:url("../img/arenith-real-structural-model.png");background-position:center;background-size:contain}
.ac-visual-fea{background-color:#f2f0ea;background-position:center;background-size:contain}
.ac-visual-check{position:relative;background-color:#f2f0ea;background-image:url("../img/arenith-real-independent-check.png");background-position:center;background-size:contain}
.ac-check-overlay{position:absolute;right:12px;bottom:12px;left:12px;display:grid;grid-template-columns:1fr 1fr;gap:2px;padding:9px;background:rgba(19,22,20,.91);color:#f4f0e7;font-size:8px;text-transform:uppercase}
.ac-check-overlay strong{grid-column:1/-1;padding:2px 5px 8px;color:#d6b586;letter-spacing:.11em}
.ac-check-overlay span{display:flex;flex-direction:column;gap:3px;padding:7px 5px;background:#252925}
.ac-check-overlay b{color:#a8c5a4}
.ac-visual-automation{background-color:#eef0ec;background-image:url("../img/arenith-real-automation-input.png"),url("../img/arenith-real-automation-output.png");background-position:left center,right center;background-size:50% auto,50% auto}
.ac-workflow-labels{position:absolute;right:8px;bottom:8px;left:8px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:5px;color:#f4f0e7;font-size:8px;font-weight:800;letter-spacing:.04em;text-align:center;text-transform:uppercase}
.ac-workflow-labels span{padding:7px 4px;background:rgba(19,22,20,.92)}
.ac-workflow-labels span:nth-child(2){color:#171914;background:#d6b586}

/* Final non-repeating service imagery */
.ac-hero-media img{opacity:1;filter:none}
.ac-visual-design{background-color:#e9e5db;background-image:url("../img/arenith-real-structural-global-top-cutout.png");background-position:center;background-size:contain}
.ac-visual-fea{background-color:#e9e5db;background-image:url("../img/arenith-real-fe-local-joint-cutout.png");background-position:center;background-size:contain}
.ac-visual-check{background-color:#2b2c29;background-image:url("../img/arenith-third-party-check-v4.png");background-position:center;background-size:contain}
.ac-visual-automation{background-color:#171a18;background-image:url("../img/arenith-automation-workflow-v5.png");background-position:center;background-size:contain}

.ac-visual-automation{background-color:#111619;background-image:url("../img/arenith-automation-input-calc-report-v6.png");background-position:center;background-size:cover}

/* Refined deliverables */
.ac-deliverables{padding:84px 0}
.ac-deliverables-grid{grid-template-columns:.9fr 1.1fr;gap:90px}
.ac-deliverables-copy h2{max-width:620px;font-size:clamp(42px,4.6vw,64px)}
.ac-deliverable-list{display:block;min-height:0;border-color:#55594f;background:#141613}
.ac-deliverable-list ol{display:grid;grid-template-columns:1fr 1fr}
.ac-deliverable-list li{min-height:118px;flex-direction:column;align-items:flex-start;justify-content:space-between;gap:15px;padding:22px 24px;border-right:1px solid #44483f}
.ac-deliverable-list li:nth-child(even){border-right:0}
.ac-deliverable-list li:last-child{grid-column:1/-1;min-height:96px;border-top:0;border-right:0}
.ac-deliverable-list li strong{max-width:280px;font-size:17px;line-height:1.25}

@media(max-width:760px){
  .ac-deliverable-list ol{grid-template-columns:1fr}
  .ac-deliverable-list li,.ac-deliverable-list li:last-child{grid-column:auto;min-height:82px;flex-direction:row;align-items:center;justify-content:flex-start;border-right:0}
}