/* ── BREADCRUMB ── */
.breadcrumb {
  background-color:black;
  padding-top: 70px; padding-bottom: 10px;
  padding-left: 56px; padding-right: 56px;
  display: flex; align-items: center; gap: 8px;
}
.bc-item { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.08em; color: var(--rule); text-decoration: none; transition: color 0.2s; }
.bc-item:hover { color: var(--rule); }
.bc-sep { font-family: var(--mono); font-size: var(--fs-text); color:var(--rule); }
.bc-current { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.08em; color:var(--rule); }


/* ── HERO (narrower than homepage) ── */
.hero {
  min-height: 100vh;
  background: var(--white);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
}

.hero-left {
  display: flex; flex-direction: column; justify-content: center;
  padding: 80px 56px 80px 56px;
  position: relative;
}
.hero-eyebrow {
  font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.14em;
  color: var(--teal); text-transform: uppercase;
  display: flex; align-items: center; gap: 10px; margin-bottom: 24px;
  opacity: 0; animation: fadeUp 0.5s 0.1s forwards;
}
.hero-eyebrow::before { content: ''; width: 28px; height: 1px; background: var(--teal); }
.hero-h1 {
  font-family: var(--display); font-size: clamp(36px, 4vw, 56px);
  font-weight: 700; line-height: 1.05; color: var(--ink); margin-bottom: 20px;
  opacity: 0; animation: fadeUp 0.5s 0.2s forwards;
}
.hero-h1 em { font-style: italic; color: var(--teal); }
.hero-sub {
  font-size: 18px; font-weight: 400; color: var(--ink-mid); line-height: 1.7;
  max-width: 500px; margin-bottom: 36px;
  opacity: 0; animation: fadeUp 0.5s 0.1s forwards;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; opacity: 0; animation: fadeUp 0.5s 0.4s forwards; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--teal); color: var(--white);
  font-family: var(--sans); font-weight: 600; font-size: var(--fs-text); letter-spacing: 0.05em;
  padding: 14px 26px; text-decoration: none; transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover { background: var(--teal-lt); transform: translateY(-1px); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--ink);
  font-family: var(--sans); font-weight: 600; font-size: var(--fs-text); letter-spacing: 0.05em;
  padding: 14px 26px; border: 1.5px solid var(--ink); text-decoration: none;
  transition: border-color 0.2s, color 0.2s, transform 0.15s;
}
.btn-secondary:hover { border-color: var(--teal); color: var(--teal); transform: translateY(-1px); }
 
/* Hero right — infographic diagram */
.hero-diagram {
  align-self: stretch;
  background: var(--ink);
  display: flex; align-items: center; justify-content: center;
  padding: 48px 36px;
  position: relative; overflow: hidden;
  opacity: 0; animation: fadeIn 0.7s 0.3s forwards;
}
.hero-diagram::before {
  content: '';
  position: absolute; inset: 0;
  background: repeating-linear-gradient(45deg, transparent, transparent 3px, rgba(10,107,82,0.04) 3px, rgba(10,107,82,0.04) 4px);
}
 
/* ── CONSTRAINTS ── */
.constraints {
  padding: 80px 56px;
  background: var(--paper);
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 80px;
  align-items: start;
}
.constraints-left { position: sticky; top: 80px; }
.section-label {
  font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.14em;
  color: var(--teal); text-transform: uppercase;
  display: flex; align-items: center; gap: 8px; margin-bottom: 16px;
}
.section-label::before { content: ''; width: 20px; height: 1px; background: var(--teal); }
.section-title {
  font-family: var(--display); font-size: clamp(26px, 2.5vw, 36px);
  font-weight: 700; line-height: 1.15; color: var(--ink);
}
.constraints-right { display: flex; flex-direction: column; gap: 0; }
 
.constraint-row {
  display: grid;
  grid-template-columns: 56px 1fr 160px;
  align-items: center;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  position: relative;
  cursor: default;
  transition: background 0.2s;
}
.constraint-row:first-child { border-top: 1px solid var(--rule); }
.constraint-row:hover { background: var(--teal-bg); margin: 0 -20px; padding-left: 20px; padding-right: 20px; }
.constraint-num {
  font-family: var(--mono); font-size: 28px; font-weight: 500;
  color: var(--rule); line-height: 1; transition: color 0.2s;
}
.constraint-row:hover .constraint-num { color: var(--teal); }
.constraint-body {}
.constraint-title {
  font-family: var(--sans); font-size: var(--fs-text); font-weight: 700;
  color: var(--ink); margin-bottom: 4px; line-height: 1.2;
}
.constraint-sub { font-size: var(--fs-text); color: var(--ink-low); line-height: 1.5; }
.constraint-tag {
  font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.08em;
  color: var(--teal); text-transform: uppercase;
  background: var(--teal-bg); padding: 5px 10px;
  text-align: center; justify-self: end;
}
 
/* ── SERVICES ── */
.services {
  padding: 80px 56px;
  background: var(--white);
}
.services-header {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 48px; padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.services-count { font-family: var(--mono); font-size: 64px; font-weight: 500; color: var(--rule); line-height: 1; }
 
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--rule);
  margin-bottom: 2px;
}
.service-card {
  background: var(--white);
  position: relative; overflow: hidden;
  transition: background 0.25s;
  cursor: default;
  display: flex; flex-direction: column;
}
.service-card::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: var(--teal);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1);
  z-index: 2;
}
.service-card:hover::after { transform: scaleX(1); }
.service-card:hover .service-img-overlay { opacity: 1; }
.service-card:hover .service-body { background: var(--teal-bg); }
 
/* Image panel */
.service-img {
  position: relative; height: 300px; overflow: hidden; flex-shrink: 0;
}
.service-img img {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16,1,0.3,1);
  filter: grayscale(20%) brightness(0.9);
}
.service-card:hover .service-img img { transform: scale(1.04); filter: grayscale(0%) brightness(1); }
.service-img-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(10,107,82,0.18) 100%);
  opacity: 0; transition: opacity 0.3s;
}
.service-img-ref {
  position: absolute; top: 12px; right: 12px; z-index: 1;
  font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.08em;
  color: var(--white); background: rgba(0,0,0,0.45);
  padding: 3px 8px; backdrop-filter: blur(4px);
}
 
/* Text body */
.service-body { padding: 24px 26px 28px; flex: 1; transition: background 0.25s; }
.service-ref { font-family: var(--mono); font-size: var(--fs-text); color: var(--rule); }
.service-title { font-family: var(--sans); font-size: var(--fs-text); font-weight: 700; color: var(--ink); margin-bottom: 10px; line-height: 1.2; }
.service-desc { font-size: var(--fs-text); color: var(--ink-low); line-height: 1.65; margin-bottom: 16px; }
.service-specs { display: flex; flex-wrap: wrap; gap: 6px; }
.service-spec { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.05em; color: var(--ink-mid); background: var(--paper); padding: 3px 8px; }
 
/* Specialist callout */
.specialist-callout {
  background: var(--ink);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 40px;
  padding: 36px 40px;
  margin-top: 2px;
}
.sc-left {}
.sc-label { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.12em; color: var(--teal-lt); text-transform: uppercase; margin-bottom: 10px; }
.sc-title { font-family: var(--display); font-size: 22px; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.sc-desc { font-size: var(--fs-text); color: rgba(255,255,255,0.45); line-height: 1.6; }
.sc-link {
  display: inline-flex; align-items: center; gap: 10px; white-space: nowrap;
  font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.08em;
  color: var(--teal-lt); text-transform: uppercase;
  text-decoration: none;
  border: 1px solid rgba(10,107,82,0.4); padding: 14px 22px;
  transition: background 0.2s, border-color 0.2s;
}
.sc-link:hover { background: rgba(10,107,82,0.15); border-color: var(--teal-lt); }
 
/* ── PROOF SECTION: Case study + Process ── */
.proof {
  padding: 80px 56px;
  background: var(--paper);
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}
 
/* Case study card */
.cs-card { background: var(--white); border: 1px solid var(--rule); }
.cs-panel {
  background: var(--ink); padding: 36px;
  position: relative; overflow: hidden; min-height: 220px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.cs-bg {
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(135deg, transparent, transparent 4px, rgba(10,107,82,0.05) 4px, rgba(10,107,82,0.05) 5px),
    linear-gradient(160deg, #0E1810 0%, #0A1F18 50%, #051510 100%);
}
.cs-badge {
  position: relative; z-index: 1;
  font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.1em;
  color: var(--teal-lt); text-transform: uppercase;
  background: rgba(0,0,0,0.35); border: 1px solid rgba(10,107,82,0.35);
  padding: 5px 10px; display: inline-block; backdrop-filter: blur(4px);
  align-self: flex-start;
}
.cs-metrics-strip {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(3,1fr);
  border-top: 1px solid rgba(255,255,255,0.08);
  margin: 0 -36px; padding: 0 36px;
  margin-top: 24px;
}
.csm { padding: 16px 0; border-right: 1px solid rgba(255,255,255,0.08); padding-right: 20px; }
.csm:last-child { border-right: none; }
.csm:not(:first-child) { padding-left: 20px; padding-right: 20px; }
.csm-val { font-family: var(--mono); font-size: 22px; color: var(--white); display: block; }
.csm-val em { font-style: normal; color: var(--teal-lt); font-size: var(--fs-text); }
.csm-key { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.1em; color: rgba(255,255,255,0.3); text-transform: uppercase; }
.cs-body { padding: 28px 28px 32px; }
.cs-loc { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.08em; color: var(--teal); text-transform: uppercase; margin-bottom: 10px; }
.cs-title { font-family: var(--display); font-size: 20px; font-weight: 700; color: var(--ink); margin-bottom: 10px; line-height: 1.2; }
.cs-summary { font-size: var(--fs-text); color: var(--ink-mid); line-height: 1.7; margin-bottom: 20px; }
.cs-link { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.1em; color: var(--teal); text-transform: uppercase; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--teal); padding-bottom: 2px; transition: gap 0.2s; }
.cs-link:hover { gap: 12px; }
 
/* Engineering process */
.process-card {
  background: var(--ink); padding: 40px;
  display: flex; flex-direction: column;
}
.proc-label { font-family: var(--mono); font-size: var(--fs-text); letter-spacing: 0.12em; color: var(--teal-lt); text-transform: uppercase; margin-bottom: 20px; }
.proc-title { font-family: var(--display); font-size: 26px; font-weight: 700; color: var(--white); line-height: 1.15; margin-bottom: 32px; }
.proc-steps { display: flex; flex-direction: column; gap: 0; flex: 1; }
.proc-step {
  display: grid; grid-template-columns: 32px 1fr;
  gap: 16px; padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
}
.proc-step:last-child { border-bottom: none; }
.proc-num-wrap { display: flex; flex-direction: column; align-items: center; gap: 0; }
.proc-num {
  width: 32px; height: 32px;
  background: rgba(10,107,82,0.15); border: 1px solid rgba(10,107,82,0.35);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: var(--fs-text); font-weight: 500; color: var(--teal-lt);
  flex-shrink: 0;
}
.proc-connector {
  flex: 1; width: 1px; background: rgba(10,107,82,0.2);
  margin: 4px auto 0; min-height: 20px;
}
.proc-step:last-child .proc-connector { display: none; }
.proc-content {}
.proc-step-title { font-family: var(--sans); font-size: var(--fs-text); font-weight: 700; color: var(--white); margin-bottom: 4px; }
.proc-step-desc { font-size: var(--fs-text); color: rgba(255,255,255,0.4); line-height: 1.6; }
.proc-cta {
  display: block; text-align: center;
  background: var(--teal); color: var(--white);
  font-family: var(--sans); font-weight: 600; font-size: var(--fs-text);
  letter-spacing: 0.05em; padding: 16px; text-decoration: none;
  margin-top: 32px; transition: background 0.2s;
}
.proc-cta:hover { background: var(--teal-lt); }
 
/* ── ENERGY FLOW INFOGRAPHIC (full width) ── */
.energy-flow {
  padding: 80px 56px;
  background: var(--white);
  overflow: hidden;
}
.ef-header { margin-bottom: 48px; }
 
/* ── CTA BAND ── */
.cta-band {
  padding: 80px 56px;
  background: var(--ink);
  display: grid; grid-template-columns: 1fr auto;
  align-items: center; gap: 40px;
}
.cta-band-title { font-family: var(--display); font-size: clamp(26px, 3vw, 40px); font-weight: 700; color: var(--white); line-height: 1.1; }
.cta-band-title em { font-style: italic; color: var(--teal-lt); }
.cta-band-sub { font-size: var(--fs-text); color: rgba(255,255,255,0.45); line-height: 1.6; margin-top: 10px; max-width: 420px; }
.cta-group { display: flex; flex-direction: column; gap: 12px; align-items: flex-end; }
.btn-primary-dark {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--teal); color: var(--white);
  font-family: var(--sans); font-weight: 600; font-size: var(--fs-text); letter-spacing: 0.05em;
  padding: 16px 28px; text-decoration: none; white-space: nowrap;
  transition: background 0.2s;
}
.btn-primary-dark:hover { background: var(--teal-lt); }
.btn-outline-dark {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: rgba(255,255,255,0.6);
  font-family: var(--sans); font-weight: 600; font-size: var(--fs-text); letter-spacing: 0.05em;
  padding: 16px 28px; border: 1px solid rgba(255,255,255,0.15); text-decoration: none; white-space: nowrap;
  transition: border-color 0.2s, color 0.2s;
}
.btn-outline-dark:hover { border-color: var(--teal-lt); color: var(--white); }

/* ── ANIMATIONS ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes flow { 0% { stroke-dashoffset: 24; } 100% { stroke-dashoffset: 0; } }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.4; } }
.flow-line { stroke-dasharray: 6 4; animation: flow 1.4s linear infinite; }
.flow-line-rev { stroke-dasharray: 6 4; animation: flow 1.4s linear infinite reverse; }
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s, transform 0.6s; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
 
/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  nav { padding: 0 24px; }
  .breadcrumb { padding: 88px 32px 0; }
  .hero { grid-template-columns: 1fr; padding: 32px 32px 0; gap: 0; }
  .hero-left { padding-bottom: 48px; }
  .hero-diagram { min-height: 320px; }
  .constraints { grid-template-columns: 1fr; padding: 60px 32px; gap: 40px; }
  .constraints-left { position: static; }
  .constraint-row { grid-template-columns: 40px 1fr; }
  .constraint-tag { display: none; }
  .services { padding: 60px 32px; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .specialist-callout { grid-template-columns: 1fr; gap: 20px; padding: 28px; }
  .proof { grid-template-columns: 1fr; padding: 60px 32px; }
  .energy-flow { padding: 60px 32px; }
  .cta-band { grid-template-columns: 1fr; padding: 60px 32px; }
  .cta-group { align-items: flex-start; }
}
@media (max-width: 640px) {
  .breadcrumb { padding: 80px 20px 0; }
  .hero { padding: 28px 20px 0; }
  .constraints { padding: 48px 20px; }
  .services { padding: 48px 20px; }
  .services-grid { grid-template-columns: 1fr; }
  .proof { padding: 48px 20px; }
  .energy-flow { padding: 48px 20px; }
  .cta-band { padding: 48px 20px; }
  .cs-metrics-strip { grid-template-columns: 1fr; }
  .csm { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .csm:last-child { border-bottom: none; }
  .csm:not(:first-child) { padding-left: 0px; padding-right: 0px; }
  .sc-link { font-size: 14px !important;letter-spacing: 1px !important; }

  .btn-primary, .btn-secondary, .btn-primary-dark, .btn-outline-dark, .tier-cta, .closing-cta, .lifecycle-cta, .training-cta, .proc-cta, .nav-cta { font-size: 14px !important; }
}


@media (max-width: 640px) {
    .hero-left { padding: 48px 20px; }
    .hero{padding: 0px;}
}