/* ============================================================
   RnB Borehole Projects — Shared Stylesheet
   Design language: "Core Sample" — geological strata as the
   signature motif, industrial stencil type for headings.
   ============================================================ */

:root{
  /* ---- Colour tokens ---- */
  --navy-950:#081420;
  --navy-900:#0C2033;
  --navy-800:#123049;
  --navy-700:#1A425F;
  --blue-500:#1E7FA3;
  --blue-400:#4FA6C4;
  --blue-300:#8FC7DC;
  --stone-50:#F6F3EC;
  --stone-100:#EFEAE0;
  --stone-200:#E2DACA;
  --clay-500:#8C6A44;
  --clay-600:#6F5335;
  --accent-500:#E2811C;
  --accent-600:#C0690F;
  --accent-100:#FCE7CE;
  --ink-900:#101B24;
  --ink-700:#33454F;
  --white:#FFFFFF;

  /* ---- Type ---- */
  --font-display:'Big Shoulders Display', sans-serif;
  --font-body:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, monospace;

  /* ---- Layout ---- */
  --max-w:1180px;
  --radius:4px;
  --header-h:76px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 12px);}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink-900);
  background:var(--white);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;}
ul{margin:0;padding:0;}
button{font-family:inherit;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:0.001ms !important;transition-duration:0.001ms !important;}
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.02;
  letter-spacing:0.005em;
  margin:0 0 0.5em;
  color:var(--navy-900);
  text-transform:uppercase;
}
h1{font-size:clamp(2.6rem,6vw,4.6rem);}
h2{font-size:clamp(2rem,4vw,3rem);}
h3{font-size:clamp(1.35rem,2.4vw,1.7rem);}
p{margin:0 0 1em;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--accent-600);
  display:flex;
  align-items:center;
  gap:0.6em;
  margin-bottom:0.9em;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--accent-500);
  display:inline-block;
}
.section{padding:5.5rem 0;}
.section--tight{padding:3.5rem 0;}
.section--navy{background:var(--navy-900);color:var(--stone-50);}
.section--navy h2,.section--navy h3{color:var(--white);}
.section--stone{background:var(--stone-50);}
.container{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem;}
.lede{font-size:1.15rem;color:var(--ink-700);max-width:62ch;}
.section--navy .lede{color:var(--blue-300);}
.center{text-align:center;margin-left:auto;margin-right:auto;}
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--accent-500);color:var(--white);
  padding:0.8em 1.2em;z-index:200;font-weight:600;
}
.skip-link:focus{left:1rem;top:1rem;}

:focus-visible{outline:3px solid var(--accent-500);outline-offset:2px;}

/* ============ Strata signature motif ============ */
.strata{
  height:14px;
  width:100%;
  background:repeating-linear-gradient(
    90deg,
    var(--clay-500) 0 10%,
    var(--stone-200) 10% 22%,
    var(--blue-500) 22% 30%,
    var(--navy-700) 30% 46%,
    var(--stone-200) 46% 56%,
    var(--clay-600) 56% 70%,
    var(--blue-400) 70% 80%,
    var(--navy-700) 80% 100%
  );
}
.strata--vert{
  width:14px;height:100%;
  background:repeating-linear-gradient(
    180deg,
    var(--clay-500) 0 10%,
    var(--stone-200) 10% 22%,
    var(--blue-500) 22% 30%,
    var(--navy-700) 30% 46%,
    var(--stone-200) 46% 56%,
    var(--clay-600) 56% 70%,
    var(--blue-400) 70% 80%,
    var(--navy-700) 80% 100%
  );
}
.core-sample{
  display:flex;
  align-items:stretch;
  gap:1.4rem;
}
.core-sample__bar{width:10px;border-radius:3px;flex-shrink:0;}
.core-sample__depth{
  font-family:var(--font-mono);
  font-size:0.72rem;
  color:var(--blue-400);
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:0.08em;
}

/* ============ Buttons / CTAs ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:0.55em;
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:0.03em;
  text-transform:uppercase;
  text-decoration:none;
  font-size:1rem;
  padding:0.85em 1.6em;
  border-radius:var(--radius);
  border:2px solid transparent;
  cursor:pointer;
  transition:transform 0.15s ease, background 0.15s ease, border-color .15s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn-row{display:flex;flex-wrap:wrap;gap:0.9rem;}
.btn--primary{background:var(--accent-500);color:var(--white);}
.btn--primary:hover{background:var(--accent-600);}
.btn--secondary{background:#25D366;color:var(--white);}
.btn--secondary:hover{background:#1EBE59;}
.btn--outline{background:transparent;border-color:var(--white);color:var(--white);}
.btn--outline:hover{background:rgba(255,255,255,0.12);}
.btn--outline-dark{background:transparent;border-color:var(--navy-900);color:var(--navy-900);}
.btn--outline-dark:hover{background:var(--navy-900);color:var(--white);}
.btn--block{width:100%;}
.btn svg{width:1.15em;height:1.15em;flex-shrink:0;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--navy-950);
  border-bottom:1px solid rgba(255,255,255,0.08);
  height:var(--header-h);
}
.site-header__inner{
  max-width:var(--max-w);margin:0 auto;padding:0 1.5rem;
  height:100%;display:flex;align-items:center;justify-content:space-between;gap:1.5rem;
}
.brand{display:flex;align-items:center;gap:0.7rem;text-decoration:none;color:var(--white);}
.brand__mark{width:40px;height:40px;flex-shrink:0;}
.brand__text{font-family:var(--font-display);font-size:1.15rem;letter-spacing:0.02em;line-height:1.05;text-transform:uppercase;}
.brand__text small{display:block;font-family:var(--font-mono);font-size:0.6rem;letter-spacing:0.14em;color:var(--blue-300);text-transform:uppercase;font-weight:400;}

.nav{display:none;}
.nav ul{display:flex;gap:2rem;list-style:none;}
.nav a{
  font-family:var(--font-mono);
  font-size:0.82rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  text-decoration:none;
  color:var(--stone-100);
  padding:0.4em 0;
  border-bottom:2px solid transparent;
  transition:border-color 0.15s ease, color .15s ease;
}
.nav a:hover,.nav a[aria-current="page"]{border-color:var(--accent-500);color:var(--white);}

.header-cta{display:none;}
.header-actions{display:flex;align-items:center;gap:0.6rem;}

.menu-toggle{
  display:inline-flex;
  align-items:center;justify-content:center;
  width:44px;height:44px;
  background:transparent;border:1px solid rgba(255,255,255,0.25);
  border-radius:var(--radius);
  color:var(--white);
}
.menu-toggle svg{width:22px;height:22px;}

.mobile-nav{
  position:fixed;inset:var(--header-h) 0 0 0;
  background:var(--navy-950);
  z-index:99;
  padding:1.5rem;
  overflow-y:auto;
  display:none;
}
.mobile-nav.is-open{display:block;}
.mobile-nav ul{list-style:none;display:flex;flex-direction:column;}
.mobile-nav a{
  display:block;
  color:var(--white);
  text-decoration:none;
  font-family:var(--font-display);
  text-transform:uppercase;
  font-size:1.6rem;
  padding:0.65em 0;
  border-bottom:1px solid rgba(255,255,255,0.1);
}
.mobile-nav__ctas{margin-top:2rem;display:flex;flex-direction:column;gap:0.9rem;}

@media(min-width:900px){
  .nav{display:block;}
  .header-cta{display:inline-flex;}
  .menu-toggle{display:none;}
}

/* ============ Hero ============ */
.hero{
  background:linear-gradient(180deg,var(--navy-950) 0%,var(--navy-900) 60%,var(--navy-800) 100%);
  color:var(--white);
  position:relative;
  overflow:hidden;
  padding:4.5rem 0 3.5rem;
}
.hero__grid{
  display:grid;
  gap:3rem;
  align-items:center;
  grid-template-columns:1fr;
}
.hero__copy{max-width:640px;}
.hero h1{color:var(--white);margin-bottom:0.55em;}
.hero__sub{font-size:1.15rem;color:var(--blue-300);max-width:56ch;margin-bottom:1.8rem;}
.hero__strip{
  margin-top:2.4rem;
  display:flex;flex-wrap:wrap;
  gap:0.7rem 1.6rem;
  font-family:var(--font-mono);
  font-size:0.82rem;
  letter-spacing:0.03em;
  color:var(--blue-300);
}
.hero__strip span{display:flex;align-items:center;gap:0.5em;}
.hero__strip span::before{content:"";width:6px;height:6px;background:var(--accent-500);display:inline-block;border-radius:1px;}

.hero__art{
  position:relative;
  min-height:320px;
  border:1px solid rgba(255,255,255,0.12);
  border-radius:8px;
  overflow:hidden;
  background:var(--navy-800);
}

@media(min-width:960px){
  .hero__grid{grid-template-columns:1.1fr 0.9fr;}
}

/* ============ Trust strip ============ */
.trust-strip{
  background:var(--stone-100);
  border-top:1px solid var(--stone-200);
  border-bottom:1px solid var(--stone-200);
}
.trust-strip .container{
  padding-top:1.1rem;padding-bottom:1.1rem;
  display:flex;flex-wrap:wrap;gap:0.8rem 2rem;
  justify-content:center;
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--clay-600);
}

/* ============ Cards / grids ============ */
.grid{display:grid;gap:1.6rem;}
.grid--2{grid-template-columns:1fr;}
.grid--3{grid-template-columns:1fr;}
.grid--4{grid-template-columns:1fr;}
@media(min-width:640px){
  .grid--2{grid-template-columns:1fr 1fr;}
  .grid--4{grid-template-columns:1fr 1fr;}
}
@media(min-width:900px){
  .grid--3{grid-template-columns:repeat(3,1fr);}
  .grid--4{grid-template-columns:repeat(4,1fr);}
}

.card{
  background:var(--white);
  border:1px solid var(--stone-200);
  border-radius:6px;
  padding:1.8rem;
  position:relative;
}
.card--navy{background:var(--navy-800);border-color:var(--navy-700);color:var(--stone-50);}
.card--navy h3{color:var(--white);}
.card__icon{width:44px;height:44px;color:var(--accent-500);margin-bottom:1rem;}
.card h3{margin-bottom:0.5em;font-size:1.25rem;}
.card p{color:var(--ink-700);margin-bottom:0.6em;font-size:0.97rem;}
.card--navy p{color:var(--blue-300);}
.card__link{
  font-family:var(--font-mono);
  font-size:0.8rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--accent-500);
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:0.4em;
}
.card__link:hover{text-decoration:underline;}

/* ============ Process steps ============ */
.process{
  display:grid;
  gap:0;
  grid-template-columns:1fr;
  border-top:1px solid var(--stone-200);
}
.process__step{
  display:grid;
  grid-template-columns:70px 1fr;
  gap:1.3rem;
  padding:1.6rem 0;
  border-bottom:1px solid var(--stone-200);
  align-items:start;
}
.process__num{
  font-family:var(--font-mono);
  font-size:0.85rem;
  color:var(--blue-400);
  background:var(--navy-900);
  width:56px;height:56px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--navy-700);
}
.process__step h3{margin-bottom:0.3em;font-size:1.15rem;}
.process__step p{color:var(--ink-700);margin:0;font-size:0.96rem;}

/* ============ Service area list ============ */
.area-tags{display:flex;flex-wrap:wrap;gap:0.6rem;}
.area-tags li{
  list-style:none;
  font-family:var(--font-mono);
  font-size:0.83rem;
  letter-spacing:0.03em;
  background:var(--white);
  border:1px solid var(--stone-200);
  padding:0.5em 0.9em;
  border-radius:3px;
  color:var(--ink-700);
}
.section--navy .area-tags li{background:var(--navy-800);border-color:var(--navy-700);color:var(--blue-300);}

/* ============ FAQ accordion ============ */
.faq{border-top:1px solid var(--stone-200);max-width:800px;}
.faq__item{border-bottom:1px solid var(--stone-200);}
.faq__q{
  width:100%;
  background:none;border:none;
  display:flex;align-items:center;justify-content:space-between;
  gap:1rem;
  padding:1.3rem 0;
  text-align:left;
  font-family:var(--font-display);
  font-size:1.08rem;
  text-transform:none;
  letter-spacing:0;
  color:var(--navy-900);
  cursor:pointer;
}
.faq__q .plus{
  flex-shrink:0;width:28px;height:28px;
  border:1px solid var(--stone-200);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  position:relative;
}
.faq__q .plus::before,.faq__q .plus::after{
  content:"";position:absolute;background:var(--accent-500);
}
.faq__q .plus::before{width:12px;height:2px;}
.faq__q .plus::after{width:2px;height:12px;transition:transform 0.2s ease;}
.faq__item[open] .plus::after{transform:rotate(90deg);opacity:0;}
.faq__a{padding:0 0 1.4rem;color:var(--ink-700);max-width:68ch;}
.faq__item summary{list-style:none;}
.faq__item summary::-webkit-details-marker{display:none;}

/* ============ Final CTA band ============ */
.cta-band{
  background:var(--navy-950);
  color:var(--white);
  position:relative;
  overflow:hidden;
}
.cta-band__inner{padding:4rem 0;text-align:center;}
.cta-band h2{color:var(--white);}
.cta-band .lede{margin:0 auto 1.8rem;color:var(--blue-300);}
.cta-band .btn-row{justify-content:center;}

/* ============ Breadcrumbs ============ */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.03em;
  color:var(--ink-700);
  padding:1rem 0;
}
.breadcrumbs a{color:var(--blue-500);text-decoration:none;}
.breadcrumbs a:hover{text-decoration:underline;}
.breadcrumbs span[aria-hidden]{margin:0 0.5em;color:var(--stone-200);}

/* ============ Footer ============ */
.site-footer{background:var(--navy-950);color:var(--stone-100);padding:3.5rem 0 1.5rem;}
.footer-grid{display:grid;gap:2.4rem;grid-template-columns:1fr;margin-bottom:2.5rem;}
.footer-col h4{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--blue-400);
  margin-bottom:1em;
}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:0.6em;}
.footer-col a{color:var(--stone-100);text-decoration:none;font-size:0.93rem;}
.footer-col a:hover{color:var(--accent-500);}
.footer-brand__text{font-family:var(--font-display);font-size:1.3rem;text-transform:uppercase;margin-bottom:0.6em;}
.footer-brand p{color:var(--blue-300);font-size:0.9rem;max-width:36ch;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);
  padding-top:1.4rem;
  display:flex;flex-wrap:wrap;gap:0.8rem;
  justify-content:space-between;
  font-family:var(--font-mono);
  font-size:0.75rem;
  color:var(--blue-400);
}
@media(min-width:640px){
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr;}
}
@media(min-width:900px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;}
}

/* ============ Mobile sticky CTA bar ============ */
.mobile-cta-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:grid;grid-template-columns:1fr 1fr 1fr;
  background:var(--navy-950);
  border-top:1px solid rgba(255,255,255,0.12);
}
.mobile-cta-bar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:0.2rem;
  padding:0.6rem 0.4rem 0.7rem;
  text-decoration:none;
  color:var(--white);
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
  border-right:1px solid rgba(255,255,255,0.08);
}
.mobile-cta-bar a:last-child{border-right:none;}
.mobile-cta-bar a svg{width:20px;height:20px;}
.mobile-cta-bar a.is-whatsapp{background:#1EBE59;}
.mobile-cta-bar a.is-quote{background:var(--accent-500);}
body{padding-bottom:64px;}
@media(min-width:900px){
  .mobile-cta-bar{display:none;}
  body{padding-bottom:0;}
}

/* ============ Form ============ */
.form-panel{
  background:var(--white);
  border:1px solid var(--stone-200);
  border-radius:8px;
  padding:2rem;
}
.form-grid{display:grid;gap:1.1rem;grid-template-columns:1fr;}
@media(min-width:640px){
  .form-grid{grid-template-columns:1fr 1fr;}
  .form-grid .field--full{grid-column:1 / -1;}
}
.field label{
  display:block;
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
  margin-bottom:0.5em;
  color:var(--ink-700);
}
.field label .req{color:var(--accent-600);}
.field input,.field select,.field textarea{
  width:100%;
  border:1px solid var(--stone-200);
  border-radius:4px;
  padding:0.75em 0.9em;
  font-family:var(--font-body);
  font-size:0.98rem;
  background:var(--stone-50);
  color:var(--ink-900);
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent-500);background:var(--white);
  box-shadow:0 0 0 3px var(--accent-100);
}
.field textarea{resize:vertical;min-height:110px;}
.field--checkbox{display:flex;align-items:flex-start;gap:0.7em;}
.field--checkbox input{width:auto;margin-top:0.25em;}
.field--checkbox label{margin:0;text-transform:none;font-family:var(--font-body);font-size:0.9rem;letter-spacing:0;color:var(--ink-700);}
.form-note{font-size:0.85rem;color:var(--ink-700);margin-top:0.5rem;}
.form-success{
  display:none;
  background:var(--stone-50);
  border:1px solid var(--stone-200);
  border-left:4px solid var(--accent-500);
  padding:1.4rem;
  border-radius:4px;
  margin-top:1.2rem;
}
.form-success.is-visible{display:block;}
.form-success h3{margin-bottom:0.3em;font-size:1.1rem;}

/* ============ Utility SVG illustration blocks ============ */
.illus{width:100%;height:100%;display:block;}

/* ============ Misc content blocks ============ */
.two-col{display:grid;gap:2.5rem;grid-template-columns:1fr;align-items:center;}
@media(min-width:900px){.two-col{grid-template-columns:1fr 1fr;}}
.list-check{list-style:none;display:flex;flex-direction:column;gap:0.7rem;}
.list-check li{display:flex;gap:0.7em;align-items:flex-start;font-size:0.98rem;color:var(--ink-700);}
.list-check li svg{flex-shrink:0;width:20px;height:20px;color:var(--accent-500);margin-top:0.15em;}

.stat-block{display:flex;gap:1.5rem;flex-wrap:wrap;}
.stat{font-family:var(--font-mono);}
.stat b{display:block;font-family:var(--font-display);font-size:1.8rem;color:var(--navy-900);}
.section--navy .stat b{color:var(--white);}


/* ============ Conversion / image enhancements ============ */
.hero__art img{width:100%;height:100%;min-height:360px;object-fit:cover;display:block;border-radius:8px;}
.image-note{font-size:.72rem;color:var(--blue-300);margin:.5rem 0 0;font-family:var(--font-mono);text-align:right;}
.section--lead-capture .form-panel{box-shadow:0 10px 35px rgba(12,32,51,.08);}
.honeypot{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden;}
.form-error{display:none;background:#fff1f0;border:1px solid #f0b6b2;border-left:4px solid #b42318;padding:1rem 1.2rem;border-radius:4px;margin-bottom:1rem;color:#7a271a;}
.form-error.is-visible{display:block;}
@media(max-width:639px){.hero__art img{min-height:280px;}.section--lead-capture .form-panel{padding:1.25rem;}}

.fig{margin:0}.fig img{width:100%;height:auto;border-radius:8px;display:block}.fig figcaption{font-size:.85rem;color:var(--ink-700);margin-top:.5rem}
.link-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.6rem;list-style:none;padding:0;margin:.8rem 0 1.2rem}.link-grid a{display:block;padding:.7rem 1rem;border:1px solid var(--stone-200);background:var(--white);border-radius:6px;font-weight:600;text-decoration:none;color:var(--navy-800)}.link-grid a:hover{border-color:var(--accent-500)}
a.card:hover{border-color:var(--accent-500)}.steps-simple{padding-left:1.2rem;display:grid;gap:.6rem}.area-tags a{color:inherit;text-decoration:none}