/* ==========================================================================
   PTNZ — Path to Net Zero
   Typography system lifted from the Dreamslab theme (Clash Display + DM Sans)
   ========================================================================== */

/* ---------- Fonts ---------- */
@font-face{font-family:'Clash Display';font-weight:300;font-style:normal;font-display:swap;
  src:url('../fonts/ClashDisplay/ClashDisplay-Light.woff2') format('woff2');}
@font-face{font-family:'Clash Display';font-weight:400;font-style:normal;font-display:swap;
  src:url('../fonts/ClashDisplay/ClashDisplay-Regular.woff2') format('woff2');}
@font-face{font-family:'Clash Display';font-weight:500;font-style:normal;font-display:swap;
  src:url('../fonts/ClashDisplay/ClashDisplay-Medium.woff2') format('woff2');}
@font-face{font-family:'Clash Display';font-weight:600;font-style:normal;font-display:swap;
  src:url('../fonts/ClashDisplay/ClashDisplay-Semibold.woff2') format('woff2');}
@font-face{font-family:'Clash Display';font-weight:700;font-style:normal;font-display:swap;
  src:url('../fonts/ClashDisplay/ClashDisplay-Bold.woff2') format('woff2');}

/* ---------- Tokens ---------- */
:root{
  --navy-900:#04101B;
  --navy-850:#071726;
  --navy-800:#0A1F33;
  --navy-700:#102B44;
  --navy-600:#17384F;

  --green:#37B24D;
  --green-soft:#5FCB73;
  --blue:#0083C0;
  --blue-soft:#3FA9DC;

  --white:#FFFFFF;
  --text:#B9C6D2;
  --text-dim:#8195A7;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.20);

  --ft-head:'Clash Display','Bebas Neue',Impact,sans-serif;
  --ft-body:'DM Sans','Helvetica Neue',Arial,sans-serif;

  --shell:1320px;
  --gut:clamp(20px,5vw,60px);
  --sec:clamp(72px,9vw,140px);
  --hdr:92px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--navy-900);
  color:var(--text);
  font-family:var(--ft-body);
  font-size:16px;
  line-height:1.625;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:all .25s cubic-bezier(.645,.045,.355,1);}
button{font:inherit;cursor:pointer;}
ul{margin:0;padding:0;list-style:none;}

/* ---------- Type scale (Dreamslab) ---------- */
h1,h2,h3,h4,h5,h6,.h1,.h2,.h3,.h4{
  font-family:var(--ft-head);
  color:var(--white);
  font-weight:600;
  line-height:1.08;
  margin:0 0 18px;
  letter-spacing:-.01em;
}
h1,.h1{font-size:clamp(34px,5.2vw,68px);}
h2,.h2{font-size:clamp(27px,3.6vw,50px);}
h3,.h3{font-size:clamp(21px,2.1vw,30px);}
h4,.h4{font-size:clamp(18px,1.5vw,22px);line-height:1.25;}
p{margin:0 0 18px;}
p:last-child{margin-bottom:0;}
strong{color:var(--white);font-weight:500;}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gut);}
.sec{padding:var(--sec) 0;position:relative;}
.sec--tight{padding:calc(var(--sec) * .62) 0;}

/* ---------- Eyebrow / section label ---------- */
.eyebrow{
  font-family:var(--ft-body);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--green-soft);
  font-weight:500;
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 22px;
}
.eyebrow::before{
  content:"";width:26px;height:1px;background:var(--green);display:inline-block;
}
.lede{font-size:clamp(17px,1.35vw,20px);line-height:1.65;color:var(--text);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--ft-body);font-size:14px;font-weight:500;
  letter-spacing:.04em;
  padding:17px 30px;border-radius:999px;border:1px solid transparent;
  white-space:nowrap;line-height:1.2;
}
.btn svg{width:15px;height:15px;flex:none;transition:transform .3s ease;}
.btn:hover svg{transform:translateX(4px);}
.btn--white{background:var(--white);color:var(--navy-900);}
.btn--white:hover{background:var(--green);color:#fff;}
.btn--ghost{background:transparent;color:var(--white);border-color:var(--line-strong);}
.btn--ghost:hover{border-color:var(--white);background:rgba(255,255,255,.06);}
.btn--green{background:var(--green);color:#fff;}
.btn--green:hover{background:var(--green-soft);}
.btn--sm{padding:13px 22px;font-size:13px;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}

/* text link with arrow */
.tlink{
  display:inline-flex;align-items:center;gap:10px;color:var(--white);
  font-size:14px;letter-spacing:.04em;font-weight:500;
  border-bottom:1px solid var(--line-strong);padding-bottom:6px;
}
.tlink:hover{color:var(--green-soft);border-color:var(--green);}

/* ==========================================================================
   HEADER — frozen / sticky
   ========================================================================== */
.hdr{
  position:fixed;inset:0 0 auto 0;z-index:120;
  background:rgba(4,16,27,.78);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s ease,box-shadow .3s ease;
}
.hdr.is-stuck{background:rgba(4,16,27,.96);box-shadow:0 10px 40px rgba(0,0,0,.45);}
.hdr__in{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--hdr);}

.brand{display:flex;flex-direction:column;gap:3px;flex:none;}
.brand img{height:38px;width:auto;}
.brand__tag{
  font-family:var(--ft-body);
  font-size:9.5px;letter-spacing:.34em;text-transform:uppercase;
  color:#9FE8B4;                 /* readable against navy, per client note */
  font-weight:500;white-space:nowrap;padding-left:2px;
}

.nav{display:flex;align-items:center;gap:34px;}
.nav a{
  font-size:14px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--text);font-weight:500;position:relative;padding:6px 0;
}
.nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--green);
  transition:width .3s cubic-bezier(.645,.045,.355,1);
}
.nav a:hover,.nav a.is-active{color:var(--white);}
.nav a:hover::after,.nav a.is-active::after{width:100%;}

.hdr__cta{display:flex;align-items:center;gap:14px;}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line-strong);background:none;
  border-radius:50%;position:relative;flex:none;
}
.burger span{
  position:absolute;left:13px;width:18px;height:1.5px;background:#fff;transition:.3s ease;
}
.burger span:nth-child(1){top:17px;}
.burger span:nth-child(2){top:22px;}
.burger span:nth-child(3){top:27px;}
body.nav-open .burger span:nth-child(1){top:22px;transform:rotate(45deg);}
body.nav-open .burger span:nth-child(2){opacity:0;}
body.nav-open .burger span:nth-child(3){top:22px;transform:rotate(-45deg);}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  position:relative;padding:calc(var(--hdr) + clamp(70px,10vw,130px)) 0 clamp(70px,9vw,120px);
  overflow:hidden;
}
.hero__bg{position:absolute;inset:0;z-index:0;}
.hero__bg::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 520px at 78% 12%, rgba(0,131,192,.30), transparent 62%),
    radial-gradient(760px 520px at 10% 88%, rgba(55,178,77,.24), transparent 60%),
    linear-gradient(180deg,#04101B 0%,#071726 55%,#04101B 100%);
}
.hero__grid{
  position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:clamp(60px,7vw,110px) clamp(60px,7vw,110px);
  mask-image:radial-gradient(ellipse at 50% 40%,#000 25%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 40%,#000 25%,transparent 78%);
}
.hero .shell{position:relative;z-index:2;}
.hero h1{max-width:15ch;}
.hero h1 em{font-style:normal;color:var(--green-soft);}
.hero__lede{max-width:56ch;margin-top:26px;}

.hero__stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  margin-top:clamp(56px,7vw,90px);background:var(--line);
  border:1px solid var(--line);
}
.hero__stat{background:var(--navy-900);padding:26px clamp(16px,2vw,28px);}
.hero__stat b{
  display:block;font-family:var(--ft-head);font-weight:600;color:#fff;
  font-size:clamp(26px,3vw,40px);line-height:1;margin-bottom:8px;
}
.hero__stat span{font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--text-dim);}

/* ==========================================================================
   Generic layout helpers
   ========================================================================== */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:clamp(36px,5vw,80px);align-items:start;}
.split--even{grid-template-columns:repeat(2,minmax(0,1fr));}
.split--flip .split__a{order:2;}
.sec-head{max-width:62ch;margin-bottom:clamp(40px,5vw,68px);}

.panel{background:var(--navy-850);border:1px solid var(--line);padding:clamp(26px,3vw,40px);}
.panel--soft{background:linear-gradient(160deg,var(--navy-800),var(--navy-850));}

/* media block (photo slot) */
.media{
  position:relative;border:1px solid var(--line);overflow:hidden;background:var(--navy-800);
  aspect-ratio:4/3;
}
.media img{width:100%;height:100%;object-fit:cover;}
.media--contain img{object-fit:contain;padding:clamp(14px,2.4vw,30px) clamp(14px,2.4vw,30px) clamp(40px,5vw,58px);}
.media__cap{
  position:absolute;left:0;bottom:0;right:0;padding:16px 20px;
  background:linear-gradient(180deg,transparent,rgba(4,16,27,.9));
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-dim);
}

/* ==========================================================================
   Numbered service rows (Dreamslab "Our Services" rhythm)
   ========================================================================== */
.rows{border-top:1px solid var(--line);}
.row{border-bottom:1px solid var(--line);}
.row__head{
  display:grid;grid-template-columns:88px minmax(0,1fr) auto;gap:clamp(16px,3vw,40px);
  align-items:center;padding:clamp(24px,3vw,34px) 0;width:100%;
  background:none;border:0;text-align:left;color:inherit;
}
.row__num{
  font-family:var(--ft-head);font-size:15px;font-weight:500;letter-spacing:.1em;
  color:var(--green-soft);
}
.row__title{
  font-family:var(--ft-head);font-weight:600;color:#fff;
  font-size:clamp(20px,2.6vw,36px);line-height:1.1;letter-spacing:-.01em;
  text-transform:uppercase;transition:color .3s ease;
}
.row:hover .row__title{color:var(--green-soft);}
.row__ico{
  width:44px;height:44px;border:1px solid var(--line-strong);border-radius:50%;
  display:grid;place-items:center;flex:none;transition:.3s ease;
}
.row__ico svg{width:14px;height:14px;transition:transform .35s ease;}
.row.is-open .row__ico{background:var(--green);border-color:var(--green);}
.row.is-open .row__ico svg{transform:rotate(45deg);}
.row__body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .45s cubic-bezier(.645,.045,.355,1);}
.row.is-open .row__body{grid-template-rows:1fr;}
.row__inner{overflow:hidden;}
.row__content{padding:0 0 34px clamp(0px,7vw,88px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);}
.row__content p{max-width:52ch;}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:6px;}
.chip{
  font-size:12.5px;letter-spacing:.05em;padding:8px 14px;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--text);background:rgba(255,255,255,.03);
}

/* ==========================================================================
   Cards
   ========================================================================== */
.cards{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);}
.cards--3{grid-template-columns:repeat(3,1fr);}
.cards--4{grid-template-columns:repeat(4,1fr);}
.card{background:var(--navy-900);padding:clamp(26px,3vw,40px);transition:background .35s ease;}
.card:hover{background:var(--navy-800);}
.card__num{font-family:var(--ft-head);font-size:13px;letter-spacing:.14em;color:var(--green-soft);margin-bottom:20px;display:block;}
.card h3,.card h4{margin-bottom:12px;text-transform:uppercase;letter-spacing:.01em;}
.card p{font-size:15px;}

/* Lifecycle */
.life{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,2.4vw,34px);counter-reset:l;}
.life__i{position:relative;padding-top:34px;}
.life__i::before{
  content:"";position:absolute;top:8px;left:0;right:0;height:1px;background:var(--line);
}
.life__i::after{
  content:"";position:absolute;top:4px;left:0;width:9px;height:9px;border-radius:50%;
  background:var(--green);box-shadow:0 0 0 4px rgba(55,178,77,.18);
}
.life__i span{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim);display:block;margin-bottom:8px;}
.life__i h4{margin-bottom:8px;text-transform:uppercase;}
.life__i p{font-size:14.5px;}

/* Bullet list */
.blist li{position:relative;padding-left:26px;margin-bottom:12px;font-size:15.5px;}
.blist li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;
  border:1.5px solid var(--green);transform:rotate(45deg);
}
.blist li strong{display:block;color:#fff;font-weight:500;font-family:var(--ft-head);
  font-size:16px;letter-spacing:.02em;}

/* Spec table */
.spec{width:100%;border-collapse:collapse;font-size:15px;}
.spec th,.spec td{text-align:left;padding:16px 14px;border-bottom:1px solid var(--line);vertical-align:top;}
.spec th{
  color:#fff;font-family:var(--ft-head);font-weight:500;font-size:14px;
  letter-spacing:.08em;text-transform:uppercase;width:38%;
}

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta{
  position:relative;overflow:hidden;border:1px solid var(--line);
  background:linear-gradient(120deg,var(--navy-800) 0%,#0C2A3F 45%,#0B3326 100%);
  padding:clamp(40px,6vw,80px);
}
.cta::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(55,178,77,.28),transparent 68%);
}
.cta__in{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:34px;align-items:center;justify-content:space-between;}
.cta__in > *:first-child{flex:1 1 440px;min-width:0;}
.cta__in > *:last-child{flex:0 0 auto;}
.cta h2{max-width:18ch;margin:0;}
.cta p{max-width:46ch;margin-top:16px;}

/* ==========================================================================
   FOOTER  (client: keep the top contact strip, drop the link block + marquee)
   ========================================================================== */
.ftr{border-top:1px solid var(--line);background:var(--navy-850);}
.ftr__strip{
  display:grid;grid-template-columns:auto repeat(2,minmax(0,1fr));gap:clamp(26px,4vw,60px);
  align-items:center;padding:clamp(40px,5vw,64px) 0;
}
.ftr__brand img{height:52px;}
.ftr__brand .brand__tag{margin-top:6px;}
.fitem{display:flex;gap:16px;align-items:flex-start;}
.fitem svg{width:22px;height:22px;flex:none;margin-top:3px;stroke:var(--green-soft);}
.fitem b{display:block;font-family:var(--ft-head);color:#fff;font-weight:500;font-size:17px;margin-bottom:3px;}
.fitem span,.fitem a{font-size:14.5px;color:var(--text-dim);}
.fitem a:hover{color:var(--green-soft);}
.ftr__base{
  border-top:1px solid var(--line);padding:24px 0;
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  font-size:13.5px;color:var(--text-dim);
}
.ftr__base nav{display:flex;gap:22px;flex-wrap:wrap;}
.ftr__base nav a:hover{color:#fff;}

/* ==========================================================================
   Forms
   ========================================================================== */
.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field--full{grid-column:1/-1;}
.field label{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-dim);}
.field input,.field select,.field textarea{
  font-family:var(--ft-body);font-size:15px;color:#fff;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  padding:15px 16px;border-radius:4px;outline:none;transition:.25s ease;width:100%;
}
.field textarea{min-height:140px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--green);background:rgba(55,178,77,.07);
}
.field select option{background:var(--navy-800);}
.form__note{font-size:13px;color:var(--text-dim);grid-column:1/-1;}

/* Page hero (inner pages) */
.phero{
  padding:calc(var(--hdr) + clamp(56px,7vw,96px)) 0 clamp(46px,6vw,80px);
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
}
.phero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(720px 420px at 82% 0%,rgba(0,131,192,.26),transparent 62%),
             radial-gradient(620px 420px at 4% 100%,rgba(55,178,77,.18),transparent 62%);
}
.phero .shell{position:relative;z-index:2;}
.phero h1{max-width:18ch;}
.phero p{max-width:60ch;margin-top:20px;}
.crumb{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim);margin-bottom:18px;}
.crumb a:hover{color:var(--green-soft);}

/* Reveal on scroll */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.645,.045,.355,1);}
.rv.in{opacity:1;transform:none;}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1100px){
  .nav{
    position:fixed;inset:var(--hdr) 0 auto 0;flex-direction:column;align-items:flex-start;
    gap:0;background:var(--navy-850);border-bottom:1px solid var(--line);
    padding:8px var(--gut) 24px;transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:.3s ease;max-height:calc(100vh - var(--hdr));overflow:auto;
  }
  body.nav-open .nav{transform:none;opacity:1;pointer-events:auto;}
  .nav a{width:100%;padding:15px 0;border-bottom:1px solid var(--line);font-size:15px;}
  .burger{display:block;}
  .hdr__cta .btn{display:none;}
  .cards--4{grid-template-columns:repeat(2,1fr);}
  .life{grid-template-columns:repeat(2,1fr);row-gap:36px;}
  .hero__stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .split,.split--even{grid-template-columns:minmax(0,1fr);}
  .split--flip .split__a{order:0;}
  .cards--3{grid-template-columns:minmax(0,1fr);}
  .row__head{grid-template-columns:48px minmax(0,1fr) auto;}
  .row__content{grid-template-columns:minmax(0,1fr);padding-left:0;}
  .ftr__strip{grid-template-columns:minmax(0,1fr);gap:28px;}
  .form{grid-template-columns:minmax(0,1fr);}
  .cta__in{display:block;}
  .cta .btn-row{margin-top:28px;}
}
@media (max-width:720px){
  .btn{white-space:normal;text-align:center;padding:15px 24px;}
}
@media (max-width:560px){
  .cards--4{grid-template-columns:minmax(0,1fr);}
  .hero__stats{grid-template-columns:minmax(0,1fr);}
  .life{grid-template-columns:minmax(0,1fr);}
  .btn{width:100%;justify-content:center;}
  .btn-row{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .rv{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}