/* ==========================================================================
   Excel Geothermal v2 — shared design system (Truvista)
   Olive #4A5D23 + earth neutrals · DM Serif Display + Inter · pill radii
   ========================================================================== */

:root {
  --olive: #4A5D23;
  --olive-deep: #3A4A1B;
  --olive-soft: #EDF0E4;      /* tint for icon circles / pills on white */
  --sage: #8A9A5B;
  --black: #1A1A1A;
  --charcoal: #2D2D2D;
  --dark-gray: #4A4A4A;
  --medium-gray: #7A7A7A;
  --light-gray: #B5B5B5;
  --border: #E5E5E0;
  --border-alt: #E8E8E4;
  --white: #FFFFFF;
  --warm-white: #FAFAF7;
  --cream: #F5F3EF;
  --navy: #1A1A2E;
  --error: #C0392B;
  --warning: #D4A017;
  /* Diagram-only exception (Educational_Graphics_Style_Guide): heat flow */
  --heat-warm: #C4553B;
  --heat-cool: #4A7A96;
  /* Earth strata (depth motif) */
  --soil-top: #6B5B45;
  --soil-mid: #8A7359;
  --soil-clay: #A08663;
  --soil-rock: #B5A182;

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius-card: 18px;
  --radius-img: 20px;
  --radius-pill: 999px;

  --shadow-card: 0 1px 4px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-nav: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-badge: 0 4px 16px rgba(0,0,0,0.08);

  --max-content: 1200px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--dark-gray);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4, h5 { margin: 0 0 0.5em; color: var(--black); line-height: 1.15; font-weight: 600; }
p { margin: 0 0 1em; }
a { color: var(--olive); text-decoration: none; }
a:hover { color: var(--olive-deep); }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--olive); outline-offset: 2px; border-radius: 4px; }
::selection { background: var(--olive); color: #fff; }

/* ---------- Type scale ---------- */
.display-hero {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.6rem, 5.4vw, 4.25rem);
  line-height: 1.05; letter-spacing: -0.02em; color: var(--black);
}
h1, .h1 { font-family: var(--font-display); font-weight: 700; font-size: clamp(2.2rem, 4.4vw, 3.4rem); letter-spacing: -0.02em; line-height: 1.08; }
h2, .h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 600; letter-spacing: -0.01em; }
h2.serif, .h2.serif { font-family: var(--font-display); font-weight: 700; }
h3, .h3 { font-size: clamp(1.2rem, 2vw, 1.45rem); }
h4, .h4 { font-size: 1.1rem; }
.lead { font-size: 1.125rem; color: var(--medium-gray); }
.small { font-size: 0.875rem; }
.text-body { color: var(--dark-gray); }
.text-muted { color: var(--medium-gray); }

/* Eyebrow section label */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500; letter-spacing: 0.04em;
  color: var(--olive); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--olive); border-radius: 2px; }
.eyebrow.pill {
  background: var(--olive-soft); border-radius: var(--radius-pill);
  padding: 6px 16px;
}
.eyebrow.pill::before { display: none; }

/* ---------- Layout ---------- */
.container { max-width: var(--max-content); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-lg { padding: 120px 0; }
.bg-white { background: var(--white); }
.bg-warm { background: var(--warm-white); }
.bg-cream { background: var(--cream); }
.bg-navy { background: var(--navy); }
.bg-olive { background: var(--olive); }

.split { display: grid; gap: 48px; align-items: center; }
@media (min-width: 900px) {
  .split-55 { grid-template-columns: 55fr 45fr; }
  .split-60 { grid-template-columns: 60fr 40fr; }
  .split-40 { grid-template-columns: 40fr 60fr; }
}
.grid-2 { display: grid; gap: 28px; }
.grid-3 { display: grid; gap: 28px; }
.grid-4 { display: grid; gap: 24px; }
@media (min-width: 700px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1000px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: var(--radius-pill); font-weight: 600; font-size: 15px;
  padding: 14px 30px; border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  text-align: center;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--olive); color: #fff; }
.btn-primary:hover { background: var(--olive-deep); color: #fff; box-shadow: 0 6px 18px rgba(74,93,35,0.28); }
.btn-secondary { background: var(--white); color: var(--charcoal); border-color: #D1D1D1; }
.btn-secondary:hover { border-color: var(--charcoal); color: var(--black); }
.btn-inverted { background: #fff; color: var(--olive); }
.btn-inverted:hover { background: var(--cream); color: var(--olive-deep); }
.btn-lg { padding: 17px 38px; font-size: 16px; }

.link-arrow { font-weight: 600; font-size: 15px; color: var(--olive); white-space: nowrap; }
.link-arrow::after { content: " →"; transition: margin 0.18s ease; }
.link-arrow:hover::after { margin-left: 4px; }

/* ---------- Header / nav ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.85); backdrop-filter: blur(8px);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}
.site-header.scrolled { background: #fff; box-shadow: var(--shadow-nav); }
.nav-utility { display: none; background: var(--cream); border-bottom: 1px solid #E8E8E4; }
.nav-utility-inner { max-width: 1200px; margin: 0 auto; padding: 7px 24px; display: flex; justify-content: flex-end; align-items: center; gap: 18px; }
.nav-utility a { font-size: 13.5px; font-weight: 500; color: var(--charcoal); }
.nav-utility a:hover { color: var(--olive); }
.nav-utility .sep { color: var(--medium-gray); font-size: 13px; }
.site-header .nav-pill {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 0 24px; height: 64px;
}
@media (min-width: 1024px) {
  .nav-utility { display: block; }
  .site-header .nav-pill { height: 72px; }
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-size: 1.15rem; color: var(--black); font-weight: 700; white-space: nowrap; }
.brand svg { flex: none; }
.brand img { height: 44px; width: auto; display: block; }
.nav-links { display: none; align-items: center; gap: 30px; list-style: none; margin: 0; padding: 0; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--charcoal); white-space: nowrap; }
.nav-links > li > a { display: inline-block; padding: 25px 0; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--olive); }
.nav-cta { display: none; align-items: center; gap: 14px; }
.nav-cta .btn { padding: 12px 28px; font-size: 15px; }
@media (min-width: 1000px) {
  .nav-links, .nav-cta { display: flex; }
  .nav-toggle { display: none; }
}

/* Services dropdown */
.has-dropdown { position: relative; }
.has-dropdown > a::after { content: " ▾"; font-size: 10px; color: var(--medium-gray); }
.dropdown {
  position: absolute; top: calc(100% - 6px); left: 50%; transform: translateX(-50%) translateY(6px);
  min-width: 250px; background: #fff; border: 1px solid var(--border);
  border-radius: 16px; box-shadow: var(--shadow-badge); padding: 10px;
  opacity: 0; visibility: hidden; transition: opacity 0.18s ease, transform 0.18s ease;
  list-style: none; margin: 0;
}
.has-dropdown:hover .dropdown, .has-dropdown:focus-within .dropdown {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.dropdown a { display: block; padding: 9px 14px; border-radius: 10px; font-size: 14px; color: var(--charcoal); }
.dropdown a:hover { background: var(--cream); color: var(--olive); }

/* Mobile nav */
.nav-toggle {
  pointer-events: auto; background: var(--olive); border: 0; border-radius: var(--radius-pill);
  width: 44px; height: 44px; display: grid; place-items: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 18px; height: 2px; background: #fff; border-radius: 2px; position: relative;
  transition: transform 0.2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.mobile-menu {
  position: fixed; inset: 0; z-index: 99; background: var(--warm-white);
  padding: 110px 32px 40px; overflow-y: auto;
  transform: translateY(-8px); opacity: 0; visibility: hidden;
  transition: opacity 0.22s ease, transform 0.22s ease;
}
.mobile-menu.open { opacity: 1; visibility: visible; transform: none; }
.mobile-menu ul { list-style: none; margin: 0; padding: 0; }
.mobile-menu a { display: block; padding: 13px 0; font-size: 1.15rem; font-weight: 500; color: var(--black); border-bottom: 1px solid var(--border); }
.mobile-menu .sub a { font-size: 0.98rem; color: var(--dark-gray); padding: 9px 0 9px 18px; border-bottom: 0; }
.mobile-menu .btn { margin-top: 24px; width: 100%; }
@media (min-width: 1000px) {
  .nav-toggle { display: none; }
  .mobile-menu { display: none; }
}

/* ---------- Hero ---------- */
.hero { padding: 170px 0 90px; position: relative; overflow: hidden; }
.hero .lead { max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.page-hero { padding: 165px 0 70px; }
.breadcrumbs { font-size: 13px; color: var(--medium-gray); margin-bottom: 18px; }
.breadcrumbs a { color: var(--medium-gray); }
.breadcrumbs a:hover { color: var(--olive); }

/* ---------- Cards ---------- */
.card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-card); padding: 30px;
  box-shadow: var(--shadow-card);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.card h3, .card h4 { margin-top: 0; }
.icon-circle {
  width: 52px; height: 52px; border-radius: 50%; background: var(--olive);
  display: grid; place-items: center; margin-bottom: 18px; flex: none;
}
.icon-circle svg { width: 24px; height: 24px; stroke: #fff; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icon-circle.soft { background: var(--olive-soft); }
.icon-circle.soft svg { stroke: var(--olive); }

.img-rounded { border-radius: var(--radius-img); object-fit: cover; width: 100%; }
.img-frame { position: relative; }
.float-badge {
  position: absolute; background: #fff; border-radius: 14px; box-shadow: var(--shadow-badge);
  padding: 14px 20px; font-size: 14px; font-weight: 600; color: var(--black);
}
.float-badge .num { display: block; font-size: 1.5rem; font-weight: 700; color: var(--olive); line-height: 1.1; }

/* ---------- Stats ---------- */
.stat-number { font-size: clamp(3rem, 6vw, 4.6rem); font-weight: 700; color: var(--black); letter-spacing: -0.02em; line-height: 1; }
.stat-number .unit { font-size: 0.5em; color: var(--olive); }
.stat-label { font-size: 15px; color: var(--medium-gray); margin-top: 8px; }
.stats-row { display: grid; gap: 36px; text-align: center; }
@media (min-width: 760px) {
  .stats-row { grid-template-columns: repeat(3, 1fr); }
  .stats-row > div + div { border-left: 1px solid var(--border); }
}
.stats-row.cols-4 { }
@media (min-width: 760px) {
  .stats-row.cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Accordion ---------- */
.accordion { border-top: 1px solid var(--border); }
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-trigger {
  width: 100%; background: none; border: 0; text-align: left;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 20px 4px; font-size: 17px; font-weight: 500; color: var(--black);
}
.accordion-trigger .chev { flex: none; transition: transform 0.25s ease; color: var(--olive); }
.accordion-item.open .accordion-trigger .chev { transform: rotate(180deg); }
.accordion-panel { overflow: hidden; max-height: 0; transition: max-height 0.32s ease; }
.accordion-panel-inner { padding: 0 4px 22px; color: var(--dark-gray); max-width: 68ch; }

/* ---------- Tabs / toggles ---------- */
.tab-bar { display: inline-flex; background: var(--cream); border-radius: var(--radius-pill); padding: 5px; gap: 4px; flex-wrap: wrap; }
.tab-bar button {
  border: 0; background: transparent; border-radius: var(--radius-pill);
  padding: 9px 22px; font-size: 14px; font-weight: 600; color: var(--dark-gray);
  transition: background 0.18s ease, color 0.18s ease;
}
.tab-bar button.active { background: var(--olive); color: #fff; }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp 0.35s ease; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-card); }
table.compare { border-collapse: collapse; width: 100%; min-width: 620px; font-size: 15px; background: #fff; }
table.compare th, table.compare td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--border); }
table.compare thead th { background: var(--cream); font-weight: 600; color: var(--black); font-size: 14px; }
table.compare tbody tr:last-child td { border-bottom: 0; }
table.compare .win { color: var(--olive); font-weight: 600; }

/* ---------- Process timeline ---------- */
.steps { counter-reset: step; display: grid; gap: 0; }
.step { position: relative; padding: 0 0 36px 64px; counter-increment: step; }
.step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 0;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--olive-soft); color: var(--olive);
  font-weight: 700; font-size: 15px;
  display: grid; place-items: center;
}
.step::after {
  content: ""; position: absolute; left: 21px; top: 50px; bottom: 6px;
  width: 2px; background: var(--border);
}
.step:last-child { padding-bottom: 0; }
.step:last-child::after { display: none; }
.step h4 { margin-bottom: 4px; }
.step p { color: var(--dark-gray); max-width: 62ch; margin-bottom: 0; }

/* ---------- Testimonials ---------- */
.stars { color: var(--olive); letter-spacing: 3px; font-size: 15px; margin-bottom: 14px; }
.quote-card cite { display: block; font-style: normal; margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--charcoal); }
.quote-card .source { font-size: 13px; color: var(--medium-gray); font-weight: 400; }

/* ---------- CTA banner ---------- */
.cta-banner { text-align: center; padding: 88px 0; }
.cta-banner h2 { color: #fff; font-family: var(--font-display); font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
.cta-banner p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 28px; }
.cta-banner .phone { display: block; margin-top: 18px; color: rgba(255,255,255,0.9); font-size: 14.5px; }
.cta-banner .phone a { color: #fff; font-weight: 600; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy); color: var(--light-gray); padding: 72px 0 0; font-size: 14px; }
.site-footer a { color: var(--light-gray); }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; gap: 40px; padding-bottom: 48px; }
@media (min-width: 800px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; } }
.site-footer h5 { color: #fff; font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 9px; }
.footer-brand { font-family: var(--font-display); color: #fff; font-size: 1.2rem; margin-bottom: 12px; display: flex; gap: 10px; align-items: center; }
.footer-brand img { height: 38px; width: auto; display: block; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0; font-size: 12.5px; color: var(--medium-gray);
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
}

/* ---------- Depth motif (site signature) ---------- */
.strata { position: relative; }
.strata-band { height: 34px; }
.depth-tick { font-size: 11px; fill: var(--medium-gray); font-family: var(--font-body); }
.earth-callout {
  display: inline-flex; align-items: baseline; gap: 8px;
  background: var(--olive-soft); border-radius: var(--radius-pill);
  padding: 8px 18px; font-size: 14px; font-weight: 600; color: var(--olive-deep);
}

/* ---------- Animation library ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes pulseSoft { 0%,100% { opacity: 1; } 50% { opacity: 0.55; } }
@keyframes flowDash { to { stroke-dashoffset: -120; } }
@keyframes flowDashRev { to { stroke-dashoffset: 120; } }
@keyframes drawLine { to { stroke-dashoffset: 0; } }
@keyframes spinSlow { to { transform: rotate(360deg); } }
@keyframes riseBar { from { transform: scaleY(0); } to { transform: scaleY(1); } }
@keyframes heatShimmer { 0%,100% { opacity: 0.35; transform: translateY(0); } 50% { opacity: 0.8; transform: translateY(-5px); } }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }

.flow-line { stroke-dasharray: 10 8; animation: flowDash 2.6s linear infinite; }
.flow-line-warm { stroke: var(--heat-warm); }
.flow-line-cool { stroke: var(--heat-cool); }
.flow-line-rev { stroke-dasharray: 10 8; animation: flowDashRev 2.6s linear infinite; }
.float-slow { animation: floatY 5s ease-in-out infinite; }
.pulse-soft { animation: pulseSoft 3s ease-in-out infinite; }

.anim-bar { transform-origin: bottom; animation: riseBar 0.9s ease forwards; transform: scaleY(0); }
.anim-bar.paused { animation-play-state: paused; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Forms ---------- */
.form-card { background: var(--cream); border-radius: var(--radius-card); padding: 36px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 500; color: var(--charcoal); margin-bottom: 7px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 16px; font: inherit; font-size: 15px;
  border: 1px solid var(--border); border-radius: 12px; background: #fff; color: var(--black);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--olive); border-color: var(--olive); }
.form-note { font-size: 13px; color: var(--medium-gray); }

/* ---------- Misc ---------- */
.divider { border: 0; border-top: 1px solid var(--border); margin: 48px 0; }
.badge-row { display: flex; flex-wrap: wrap; gap: 12px; }
.badge-chip {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); border-radius: var(--radius-pill);
  background: #fff; padding: 8px 18px; font-size: 13.5px; font-weight: 500; color: var(--charcoal);
}
.badge-chip svg { width: 15px; height: 15px; stroke: var(--olive); fill: none; stroke-width: 2; }
.callout {
  border-left: 3px solid var(--olive); background: var(--warm-white);
  border-radius: 0 14px 14px 0; padding: 20px 24px; margin: 24px 0;
}
.callout.cream { background: var(--cream); }
.callout h4 { margin-bottom: 6px; }
.callout p:last-child { margin-bottom: 0; }
.checklist { list-style: none; padding: 0; margin: 0 0 1em; }
.checklist li { position: relative; padding-left: 30px; margin-bottom: 10px; }
.checklist li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 20px; height: 20px; border-radius: 50%; background: var(--olive-soft);
  color: var(--olive); font-size: 12px; font-weight: 700;
  display: grid; place-items: center;
}
.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 200; background: #fff; padding: 10px 18px; border-radius: 8px; }
.skip-link:focus { left: 8px; }