:root{
  --ink:#0B1F29; --ink2:#123340; --teal:#14857C; --teald:#0B6B63; --paper:#F5F4F0;
  --slate:#33454E; --amber:#F4A62A; --line:#e2e8e8; --muted:#6b7c84; --white:#ffffff;
  --wrap:1160px; --r:16px; --shadow:0 10px 40px rgba(14,42,56,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;color:var(--slate);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,.dsp{font-family:'Space Grotesk','Inter',sans-serif;color:var(--ink);line-height:1.08;letter-spacing:-.01em}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.eyebrow{font-family:'Space Grotesk';font-weight:600;font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--teald)}
.btn{display:inline-flex;align-items:center;gap:9px;font-family:'Space Grotesk';font-weight:600;font-size:15px;padding:14px 26px;border-radius:999px;border:2px solid transparent;transition:.18s;cursor:pointer}
.btn-primary{background:var(--teal);color:#ffffff}
.btn-primary:hover{background:#0f6e67;transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.28);color:#fff}
.btn-ghost:hover{border-color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink2)}
.btn-lg{padding:17px 34px;font-size:16px}

/* header */
header.site{position:sticky;top:0;z-index:50;background:rgba(244,246,245,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.brand svg{width:40px;height:40px}
.brand .wm{font-family:'Space Grotesk';font-weight:700;font-size:21px;color:var(--ink);letter-spacing:.005em;line-height:1}
.brand .wm .lab{color:var(--teal)}
.brand .wm small{display:block;font-family:'Inter';font-weight:600;font-size:8.5px;letter-spacing:.2em;color:var(--muted)}
.nav ul{display:flex;gap:30px;list-style:none;align-items:center}
.nav ul a{font-family:'Space Grotesk';font-weight:500;font-size:15px;color:var(--slate)}
.nav ul a:hover{color:var(--teald)}
.nav .cta{display:flex;gap:10px;align-items:center}
.menu-btn{display:none;background:none;border:0;font-size:26px;line-height:1;color:var(--ink);cursor:pointer;padding:4px 6px}
.mainnav ul .navcta{display:none}
@media(max-width:900px){
  .nav .cta .btn:not(.wa){display:none} .brand .wm small{display:none}
  .menu-btn{display:block}
  .brand svg{width:34px;height:34px} .brand .wm{font-size:18px}
  .mainnav{position:absolute;top:100%;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 18px 40px rgba(11,31,41,.14);max-height:0;overflow:hidden;transition:max-height .3s ease}
  .mainnav.open{max-height:80vh}
  .mainnav ul{flex-direction:column;gap:0;padding:6px 22px 18px;align-items:stretch}
  .mainnav ul li{width:100%}
  .mainnav ul a{display:block;padding:15px 2px;font-size:17px;border-top:1px solid var(--line)}
  .mainnav ul li:first-child a{border-top:0}
  .mainnav ul .navcta{display:block;margin-top:12px}
  .mainnav ul .navcta a{background:var(--teal);color:#fff;text-align:center;border-radius:40px;padding:15px;border-top:0;font-weight:600}
}

/* hero */
.hero{background:linear-gradient(160deg,#081720 0%,#0B1F29 55%,#0d2733 100%);color:#dfe9ec;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-160px;top:-120px;width:520px;height:520px;background:radial-gradient(circle,rgba(20,133,124,.22),transparent 65%);pointer-events:none}
.hero .wrap{padding:78px 24px 84px;position:relative;z-index:2}
.hero h1{color:#fff;font-size:clamp(34px,5.4vw,58px);max-width:16ch}
.hero .lead{font-size:clamp(17px,2.2vw,21px);color:#b6cad0;max-width:56ch;margin:22px 0 30px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:40px;padding-top:26px;border-top:1px solid rgba(255,255,255,.12)}
.trust div{font-size:13.5px;color:#9fb4bd;display:flex;align-items:center;gap:9px}
.trust b{color:#fff;font-family:'Space Grotesk';font-weight:600}
.tag{color:var(--teal)}

section{padding:78px 0}
.section-head{max-width:60ch}
.section-head h2{font-size:clamp(26px,3.6vw,40px);margin-top:10px}
.section-head p{margin-top:14px;font-size:17px;color:var(--muted)}
.lead-dark{color:#b6cad0}

/* wedge */
.wedge{background:var(--white)}
.wedge-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;margin-top:14px}
.wedge-grid.rev{margin-top:44px}
.problem{background:#fbf3ee;border:1px solid #f2ddce;border-radius:var(--r);padding:26px 28px}
.problem h3{font-size:19px;color:#a8562a}
.problem p{margin-top:8px;color:#8a5638;font-size:15px}
.answer{background:var(--ink);color:#dbe8ea;border-radius:var(--r);padding:26px 28px}
.answer h3{color:#fff;font-size:19px}
.answer p{margin-top:8px;color:#a9c3ca;font-size:15px}
@media(max-width:820px){.wedge-grid{grid-template-columns:1fr;gap:22px}}

/* pillars */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.pillar{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:30px 28px;transition:.2s;position:relative;overflow:hidden}
.pillar:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#cfe6e3}
.pillar .num{font-family:'Space Grotesk';font-weight:700;font-size:13px;color:var(--teal);letter-spacing:.1em}
.pillar h3{font-size:23px;margin:12px 0 10px}
.pillar p{font-size:15px;color:var(--muted)}
.pillar ul{list-style:none;margin:16px 0 20px}
.pillar li{font-size:14px;padding:5px 0 5px 22px;position:relative;color:var(--slate)}
.pillar li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:2px;background:var(--teal)}
.pillar .more{font-family:'Space Grotesk';font-weight:600;font-size:14px;color:var(--teald)}
.pillar .more:hover{gap:10px}
@media(max-width:820px){.pillars{grid-template-columns:1fr}}

/* report spine */
.spine{background:var(--ink);color:#cddde1}
.spine .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.spine h2{color:#fff;font-size:clamp(26px,3.6vw,38px)}
.spine .eyebrow{color:var(--teal)}
.spine p{margin-top:16px;color:#a9c3ca;font-size:16.5px}
.spine ul{list-style:none;margin-top:22px;display:flex;flex-direction:column;gap:12px}
.spine li{padding-left:30px;position:relative;color:#cfe0e4;font-size:15px}
.spine li::before{content:"";position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;border:2px solid var(--teal)}
.doc-card{background:linear-gradient(155deg,#123340,#081720);border:1px solid rgba(20,133,124,.25);border-radius:20px;padding:34px;position:relative}
.doc-card .stamp{position:absolute;top:26px;right:26px;width:78px;height:78px;border:2px solid rgba(20,133,124,.55);border-radius:50%;display:flex;align-items:center;justify-content:center;text-align:center;font-family:'Space Grotesk';font-size:8.5px;letter-spacing:.12em;color:var(--teal);transform:rotate(-12deg);line-height:1.3}
.doc-card h4{color:#fff;font-size:15px;letter-spacing:.02em}
.doc-line{height:9px;border-radius:5px;background:rgba(255,255,255,.09);margin:11px 0}
.doc-thermal{height:120px;border-radius:10px;margin:18px 0;background:linear-gradient(120deg,#0B1F29,#0B6B63 35%,#F4A62A 72%,#e5533a 100%);opacity:.9}
.sig{font-family:'Space Grotesk';color:var(--teal);font-size:22px;font-style:italic;margin-top:14px}
.sig small{display:block;font-family:'Inter';font-style:normal;color:#8ba7af;font-size:11px;letter-spacing:.04em;margin-top:2px}
@media(max-width:820px){.spine .wrap{grid-template-columns:1fr;gap:34px}.doc-card .stamp{width:64px;height:64px}}

/* process */
.process{background:var(--white)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px;counter-reset:s}
.step{padding:26px 22px;border-radius:var(--r);background:var(--paper);border:1px solid var(--line)}
.step .k{width:40px;height:40px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-family:'Space Grotesk';font-weight:700}
.step h4{font-size:17px;margin:14px 0 8px}
.step p{font-size:14px;color:var(--muted)}
@media(max-width:820px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}

/* credibility */
.cred{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:44px}
.cred .c{text-align:left}
.cred .ic{width:46px;height:46px;border-radius:12px;background:#e6f5f3;color:var(--teald);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.cred h4{font-size:16px}
.cred p{font-size:14px;color:var(--muted);margin-top:6px}
@media(max-width:820px){.cred{grid-template-columns:1fr 1fr}}

/* engineer band */
.eng{background:var(--paper)}
.eng .wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:44px;align-items:center}
.eng .card{background:var(--ink);border-radius:20px;padding:38px;color:#cddde1}
.eng .card .badge{display:inline-block;background:rgba(20,133,124,.15);color:var(--teal);font-family:'Space Grotesk';font-weight:600;font-size:12px;letter-spacing:.08em;padding:6px 14px;border-radius:999px}
.eng .card h3{color:#fff;margin:16px 0 6px;font-size:24px}
.eng .card .role{color:var(--teal);font-size:14px;font-family:'Space Grotesk'}
.eng .card p{margin-top:14px;color:#a9c3ca;font-size:15px}
@media(max-width:820px){.eng .wrap{grid-template-columns:1fr;gap:24px}}

/* areas */
.areas{background:var(--white)}
.chips{display:flex;flex-wrap:wrap;gap:11px;margin-top:26px}
.chip2{background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:9px 18px;font-size:14px;font-family:'Space Grotesk';font-weight:500;color:var(--slate)}

/* faq */
.faq{background:var(--paper)}
.qa{max-width:820px;margin:34px auto 0}
.qa details{background:var(--white);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.qa summary{padding:20px 24px;font-family:'Space Grotesk';font-weight:600;color:var(--ink);cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;font-size:16px}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";color:var(--teal);font-size:22px;line-height:1}
.qa details[open] summary::after{content:"\2013"}
.qa .a{padding:0 24px 22px;color:var(--muted);font-size:15px}

/* cta band */
.cta-band{background:linear-gradient(150deg,#0B6B63,#0B1F29);color:#fff;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(26px,3.6vw,40px);max-width:20ch;margin:0 auto}
.cta-band p{color:#bfe0dc;margin:16px auto 28px;max-width:52ch;font-size:17px}
.cta-band .actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* footer */
footer.site{background:#07141b;color:#8ba7af;padding:60px 0 34px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
footer .brand .wm{color:#fff}
footer h5{color:#fff;font-family:'Space Grotesk';font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px}
footer a{color:#a9c3ca;display:block;padding:4px 0}
footer a:hover{color:var(--teal)}
.legal{margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-size:12.5px;color:#6f8a92;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* inner page hero */
.subhero{background:linear-gradient(160deg,#081720,#0B1F29);color:#cddde1}
.subhero .wrap{padding:64px 24px 60px}
.subhero h1{color:#fff;font-size:clamp(30px,4.6vw,50px);max-width:18ch}
.subhero p{margin-top:18px;color:#b6cad0;max-width:58ch;font-size:18px}
.crumbs{font-size:13px;color:#7fa0a9;margin-bottom:18px;font-family:'Space Grotesk'}
.crumbs a{color:#7fa0a9}
.two{display:grid;grid-template-columns:1.3fr .7fr;gap:48px}
@media(max-width:820px){.two{grid-template-columns:1fr;gap:32px}}
.prose h2{font-size:28px;margin:6px 0 14px}
.prose h3{font-size:20px;margin:26px 0 10px}
.prose p{margin-bottom:14px;font-size:16px;color:var(--slate)}
.prose ul{margin:8px 0 18px 0;list-style:none}
.prose li{padding:7px 0 7px 26px;position:relative;font-size:15.5px}
.prose li::before{content:"";position:absolute;left:0;top:14px;width:9px;height:9px;border-radius:2px;background:var(--teal)}
.aside{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:28px;position:sticky;top:96px}
.aside h4{font-size:17px;margin-bottom:6px}
.aside p{font-size:14px;color:var(--muted);margin-bottom:16px}
.aside .row{display:flex;align-items:center;gap:10px;font-size:14px;padding:9px 0;border-top:1px solid var(--line)}
.aside .row .ic{color:var(--teald)}
.incl{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0 8px}
.incl .i{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:18px}
.incl .i h4{font-size:15px;color:var(--ink);margin-bottom:5px}
.incl .i p{font-size:13.5px;color:var(--muted)}
@media(max-width:520px){.incl{grid-template-columns:1fr}}
.callout{background:#e6f5f3;border-left:4px solid var(--teal);border-radius:8px;padding:18px 22px;margin:22px 0}
.callout b{color:var(--teald)}

/* photos */
.photostrip{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px}
.photostrip .ph{border-radius:var(--r);overflow:hidden;height:250px;position:relative}
.photostrip img{width:100%;height:100%;object-fit:cover;display:block}
.photostrip .cap{position:absolute;left:0;right:0;bottom:0;padding:26px 16px 12px;background:linear-gradient(transparent,rgba(8,23,32,.85));color:#fff;font-family:'Space Grotesk';font-weight:500;font-size:13px}
@media(max-width:820px){.photostrip{grid-template-columns:1fr}}
.pageband{border-radius:var(--r);overflow:hidden;margin:26px 0 6px;position:relative}
.pageband img{width:100%;display:block;object-fit:cover;max-height:380px}
.pageband .cap{position:absolute;left:0;right:0;bottom:0;padding:30px 18px 13px;background:linear-gradient(transparent,rgba(8,23,32,.85));color:#fff;font-family:'Space Grotesk';font-weight:500;font-size:13.5px}

/* blog */
.postmeta{margin-top:16px;font-family:'Space Grotesk';font-size:13px;color:#7fa0a9}
.postwrap{max-width:860px}
.post h2{font-size:26px;margin:34px 0 12px}
.post p{font-size:16.5px;line-height:1.75}
table.cmp{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;background:#fff;border-radius:12px;overflow:hidden}
table.cmp th,table.cmp td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
table.cmp th{background:var(--ink);color:#fff;font-family:'Space Grotesk';font-weight:600}
table.cmp tr td:first-child{font-weight:600;color:var(--ink)}
.authorbox{background:#fff;border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:10px;padding:18px 22px;margin-top:30px;font-size:14.5px;line-height:1.6;color:var(--slate)}
.relgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:12px}
.relcard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;font-family:'Space Grotesk';font-weight:600;font-size:14.5px;color:var(--ink);transition:.15s}
.relcard:hover{border-color:var(--teal);color:var(--teald)}
@media(max-width:700px){.relgrid{grid-template-columns:1fr}}
.bgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.bcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.bcard:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.bimg{height:190px;overflow:hidden}
.bimg img{width:100%;height:100%;object-fit:cover;display:block}
.bbody{padding:20px 22px 22px}
.bcat{font-family:'Space Grotesk';font-weight:600;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--teald)}
.bbody h3{font-size:18px;margin:8px 0 8px;line-height:1.3}
.bbody p{font-size:13.5px;color:var(--muted);line-height:1.55}
.bmeta{margin-top:12px;font-size:12px;color:#9aa7ad;font-family:'Space Grotesk'}
@media(max-width:900px){.bgrid{grid-template-columns:1fr}}

.doc-sub{font-size:12.5px;color:#8ba7af;margin:6px 0 14px;font-family:'Space Grotesk'}
.doc-img{width:100%;border-radius:10px;display:block;border:1px solid rgba(255,255,255,.12)}

/* ===== v3: methods, zones, equipment ===== */
.mgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.mcard{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column}
.mcard .mimg{height:150px;overflow:hidden;background:var(--ink)}
.mcard .mimg img{width:100%;height:100%;object-fit:cover;display:block}
.mcard .mb{padding:18px 20px 20px}
.mcard .ic{width:38px;height:38px;border-radius:10px;background:rgba(20,133,124,.1);color:var(--teald);display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.mcard h3,.mcard h4{font-size:17px;color:var(--ink)}
.mcard p{font-size:14.5px;margin-top:6px;line-height:1.55}
.mcard .tag{display:inline-block;font-family:'Space Grotesk';font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--teald);text-transform:uppercase;margin-bottom:8px}
.zones{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px}
.zone{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 16px 18px}
.zone .zn{font-family:'Space Grotesk';font-weight:700;font-size:13px;color:var(--teal)}
.zone h4{font-size:15px;color:var(--ink);margin-top:6px}
.zone p{font-size:13px;margin-top:5px;line-height:1.5}
.diag{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px;counter-reset:dg}
.dstep{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:22px}
.dstep .k{width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;font-family:'Space Grotesk';font-weight:700;display:flex;align-items:center;justify-content:center}
.dstep h4{font-size:16.5px;color:var(--ink);margin-top:12px}
.dstep p{font-size:14.5px;margin-top:6px;line-height:1.55}
.equip{background:var(--ink);border-radius:20px;padding:38px;display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center;margin-top:40px}
.equip h3{color:#fff;font-size:26px}
.equip .esub{color:#a9c3ca;margin-top:8px;font-size:15.5px;line-height:1.6}
.equip ul{list-style:none;margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}
.equip li{color:#cfe0e3;font-size:14px;line-height:1.45;padding-left:24px;position:relative}
.equip li b{color:#fff;display:block;font-family:'Space Grotesk';font-size:14.5px}
.equip li:before{content:"";position:absolute;left:0;top:6px;width:12px;height:12px;border-radius:3px;background:var(--teal)}
.equip .eimg{border-radius:14px;overflow:hidden;background:#fff}
.equip .eimg img{width:100%;display:block}
.equip .eimg .cap{font-size:12.5px;color:var(--slate);padding:10px 14px;background:#fff}
@media(max-width:980px){.mgrid{grid-template-columns:1fr 1fr}.zones{grid-template-columns:1fr 1fr}.diag{grid-template-columns:1fr}.equip{grid-template-columns:1fr;padding:26px}}
@media(max-width:640px){.mgrid{grid-template-columns:1fr}}
@media(max-width:560px){.equip ul{grid-template-columns:1fr}
  .nav .cta .wa{display:none} .brand .wm{font-size:19px}}

/* ===== v3: scroll reveal ===== */
@media(prefers-reduced-motion:no-preference){
.rv{opacity:0;transform:translateY(26px);transition:opacity .65s ease,transform .7s cubic-bezier(.16,1,.3,1);transition-delay:var(--rvd,0s)}
.rv.in{opacity:1;transform:none}
.hero .wrap>*,.subhero .wrap>*{opacity:0;transform:translateY(22px);animation:heroin .8s cubic-bezier(.16,1,.3,1) forwards}
.hero .wrap>*:nth-child(2),.subhero .wrap>*:nth-child(2){animation-delay:.08s}
.hero .wrap>*:nth-child(3),.subhero .wrap>*:nth-child(3){animation-delay:.16s}
.hero .wrap>*:nth-child(4),.subhero .wrap>*:nth-child(4){animation-delay:.24s}
.hero .wrap>*:nth-child(5),.subhero .wrap>*:nth-child(5){animation-delay:.32s}
@keyframes heroin{to{opacity:1;transform:none}}
}