:root {
  --cfu-primary: #e02424;
  --cfu-primary-hover: #b91d1d;
  --cfu-dark: #0f172a;       /* Deep slate for a modern industrial feel */
  --cfu-dark-secondary: #1e293b;
  --cfu-text: #334155;       /* Slate-700 */
  --cfu-muted: #64748b;      /* Slate-500 */
  --cfu-light: #f8fafc;      /* Very soft blue-grey */
  --cfu-border: #e2e8f0;     /* Slate-200 */
  --cfu-white: #ffffff;
  
  --cfu-font-main: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --cfu-font-cond: 'IBM Plex Sans Condensed', system-ui, -apple-system, sans-serif;
}

.cfu-page {
  font-family: var(--cfu-font-main);
  color: var(--cfu-text);
  line-height: 1.6;
  background-color: var(--cfu-white);
  overflow-x: hidden;
}

.cfu-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ==================================
   TYPOGRAPHY
   ================================== */
.cfu-page h1, .cfu-page h2, .cfu-page h3 {
  font-family: var(--cfu-font-cond);
  font-weight: 700;
  color: var(--cfu-dark);
  margin-top: 0;
  letter-spacing: -0.02em;
}

.cfu-page a {
  color: var(--cfu-primary);
  transition: all 0.2s ease;
}

/* ==================================
   BUTTONS
   ================================== */
.cfu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: 2px solid transparent;
  letter-spacing: 0.5px;
}

.cfu-btn-primary {
  background-color: var(--cfu-primary);
  color: var(--cfu-white) !important;
  box-shadow: 0 4px 14px rgba(224, 36, 36, 0.3);
}

.cfu-btn-primary:hover {
  background-color: var(--cfu-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(224, 36, 36, 0.4);
}

.cfu-btn-ghost {
  background-color: transparent;
  color: var(--cfu-white) !important;
  border-color: rgba(255, 255, 255, 0.4);
}

.cfu-btn-ghost:hover {
  background-color: var(--cfu-white);
  color: var(--cfu-dark) !important;
  border-color: var(--cfu-white);
  transform: translateY(-2px);
}

/* ==================================
   HERO
   ================================== */
.cfu-hero {
  background: linear-gradient(145deg, #020617 0%, #0f172a 100%);
  color: var(--cfu-white);
  padding: 8rem 0 6rem;
  position: relative;
  overflow: hidden;
}

/* Subtle grid pattern in hero background */
.cfu-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
  linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.cfu-eyebrow-line {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: #94a3b8;
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 2;
}

.cfu-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: var(--cfu-primary);
  border-radius: 50%;
  margin-right: 12px;
  box-shadow: 0 0 12px var(--cfu-primary);
}

.cfu-hero h1,
.cfu-hero h2.cfu-hero-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  color: var(--cfu-white);
  line-height: 1.1;
  margin-bottom: 2rem;
  max-width: 1000px;
  position: relative;
  z-index: 2;
  margin-top: 0;
}

.cfu-hero-lede {
  font-size: 1.25rem;
  color: #cbd5e1;
  max-width: 850px;
  margin-bottom: 3rem;
  font-weight: 400;
  line-height: 1.7;
  position: relative;
  z-index: 2;
}

.cfu-hero-lede strong {
  color: var(--cfu-white);
  font-weight: 600;
}

.cfu-hero-cta {
  display: flex;
  gap: 1rem;
  margin-bottom: 5rem;
  position: relative;
  z-index: 2;
}

.cfu-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 3rem;
  position: relative;
  z-index: 2;
}

.cfu-stat {
  padding-right: 2rem;
}

.cfu-stat b {
  display: block;
  font-size: 3rem;
  font-family: var(--cfu-font-cond);
  color: var(--cfu-primary);
  line-height: 1;
  margin-bottom: 0.75rem;
  text-shadow: 0 2px 10px rgba(224,36,36,0.2);
}

.cfu-stat span {
  font-size: 0.95rem;
  color: #94a3b8;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  display: block;
}

/* ==================================
   QUICK NAV
   ================================== */
.cfu-quicknav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--cfu-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.cfu-quicknav .cfu-wrap {
  max-width: 100%;
  padding: 0 1rem;
}

.cfu-quicknav ul {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-x: auto;
  scrollbar-width: none;
  justify-content: flex-start;
}

@media (min-width: 1200px) {
  .cfu-quicknav ul {
    justify-content: center;
  }
}

.cfu-quicknav ul::-webkit-scrollbar {
  display: none;
}

.cfu-quicknav li a {
  display: block;
  padding: 1rem 1.1rem;
  color: var(--cfu-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
}

.cfu-quicknav li a:hover {
  color: var(--cfu-primary);
  border-bottom-color: var(--cfu-primary);
  background: var(--cfu-light);
}

html {
  scroll-behavior: smooth;
}

/* ==================================
   SECTION UTILS
   ================================== */
.cfu-section {
  padding: 7rem 0;
  scroll-margin-top: 100px;
}

.cfu-section--alt {
  background-color: var(--cfu-light);
  border-top: 1px solid var(--cfu-border);
  border-bottom: 1px solid var(--cfu-border);
}

/* Centralized Section Headers to reduce awkward left white space */
.cfu-section-head {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 5rem;
}

.cfu-section-num {
  font-family: var(--cfu-font-cond);
  font-size: 5rem;
  font-weight: 800;
  color: #e2e8f0;
  line-height: 1;
  display: block;
  margin-bottom: 0.5rem;
}

.cfu-section-head h2 {
  font-size: 2.8rem;
  margin-bottom: 1.25rem;
  color: var(--cfu-dark);
}

.cfu-section-head p {
  font-size: 1.25rem;
  color: var(--cfu-muted);
}

/* ==================================
   GRIDS & CARDS
   ================================== */
.cfu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.cfu-grid--type {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.cfu-card {
  background: var(--cfu-white);
  border: 1px solid var(--cfu-border);
  padding: 2.5rem;
  border-radius: 12px;
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

/* Top accent on cards */
.cfu-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--cfu-primary);
  border-radius: 12px 12px 0 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cfu-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  border-color: transparent;
}

.cfu-card:hover::before {
  opacity: 1;
}

.cfu-card h3 {
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

.cfu-card h3 a {
  color: var(--cfu-dark);
  text-decoration: none;
  background-image: linear-gradient(var(--cfu-primary), var(--cfu-primary));
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: left bottom;
  transition: background-size 0.3s ease;
}

.cfu-card:hover h3 a {
  background-size: 100% 2px;
  color: var(--cfu-primary);
}

.cfu-card p {
  color: var(--cfu-text);
  font-size: 1.05rem;
  flex-grow: 1;
  margin-bottom: 0;
}

.cfu-card-link {
  display: inline-flex;
  align-items: center;
  margin-top: 1.5rem;
  font-weight: 600;
  color: var(--cfu-primary);
  text-decoration: none;
  transition: color 0.2s, transform 0.2s;
}

.cfu-card-link:hover {
  color: var(--cfu-dark);
  transform: translateX(4px);
}

/* ==================================
   TAG LIST (For Material Specs)
   ================================== */
.cfu-taglist {
  list-style: none;
  padding: 0;
  margin: 1.75rem 0 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.cfu-taglist li {
  font-size: 0.8rem;
  background: var(--cfu-light);
  color: var(--cfu-muted);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  border: 1px solid var(--cfu-border);
  font-weight: 500;
}

/* ==================================
   SPLIT LAYOUT (Modernized to reduce white space)
   ================================== */
.cfu-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}
@media (min-width: 992px) {
  .cfu-split {
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
  }
}

/* For sections that need visual balance */
.cfu-split > div:last-child {
  background: var(--cfu-white);
  padding: 3rem;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.04);
  border: 1px solid var(--cfu-border);
}
.cfu-section--alt .cfu-split > div:last-child {
  background: var(--cfu-light); /* Matching alt background but with shadow */
}

/* ==================================
   TABLES
   ================================== */
.cfu-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--cfu-border);
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}
.cfu-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--cfu-white);
}
.cfu-table caption {
  background: var(--cfu-dark);
  color: var(--cfu-white);
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  caption-side: top;
  text-align: left;
  font-size: 1.1rem;
}
.cfu-table th, .cfu-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--cfu-border);
  text-align: left;
}
.cfu-table th {
  background: var(--cfu-light);
  font-weight: 600;
  color: var(--cfu-dark);
  font-size: 1rem;
}
.cfu-table tr:hover td {
  background: #f1f5f9;
}
.cfu-table tr:last-child td {
  border-bottom: none;
}

/* ==================================
   CHIPS
   ================================== */
.cfu-chipband {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.cfu-chip {
  background: var(--cfu-white);
  border: 1px solid var(--cfu-border);
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--cfu-text);
  box-shadow: 0 2px 5px rgba(0,0,0,0.02);
  transition: all 0.3s;
}
.cfu-chip:hover {
  border-color: var(--cfu-primary);
  color: var(--cfu-white);
  background: var(--cfu-primary);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(224,36,36,0.2);
}

/* ==================================
   LISTS & PROCESS
   ================================== */
.cfu-list {
  padding: 0;
  list-style: none;
}
.cfu-list li {
  margin-bottom: 1rem;
  color: var(--cfu-text);
  font-size: 1.05rem;
  padding-left: 2rem;
  position: relative;
  line-height: 1.5;
}
.cfu-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--cfu-primary);
  font-weight: bold;
  font-size: 1.2rem;
}

.cfu-process {
  list-style: none;
  padding: 0;
  counter-reset: cfu-counter;
}
.cfu-process li {
  position: relative;
  padding-left: 3.5rem;
  margin-bottom: 2rem;
  color: var(--cfu-dark);
  font-weight: 600;
  font-size: 1.1rem;
}
.cfu-process li::before {
  counter-increment: cfu-counter;
  content: counter(cfu-counter);
  position: absolute;
  left: 0;
  top: -4px;
  width: 36px;
  height: 36px;
  background: var(--cfu-white);
  border: 2px solid var(--cfu-primary);
  color: var(--cfu-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 0 0 4px rgba(224, 36, 36, 0.1);
}
.cfu-process li:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 17px;
  top: 36px;
  width: 2px;
  height: calc(100% - 4px);
  background: var(--cfu-border);
}

/* ==================================
   FAQ ACCORDION
   ================================== */
.cfu-faq details {
  background: var(--cfu-white);
  border: 1px solid var(--cfu-border);
  border-radius: 10px;
  margin-bottom: 1.25rem;
  transition: all 0.3s ease;
  overflow: hidden;
}
.cfu-faq details[open] {
  border-color: rgba(224, 36, 36, 0.4);
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
}
.cfu-faq summary {
  padding: 1.5rem;
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--cfu-dark);
  background: var(--cfu-white);
}
.cfu-faq summary::-webkit-details-marker {
  display: none;
}
.cfu-faq summary::after {
  content: '+';
  font-size: 1.8rem;
  color: var(--cfu-primary);
  transition: transform 0.3s;
  line-height: 1;
}
.cfu-faq details[open] summary::after {
  transform: rotate(45deg);
}
.cfu-faq p {
  padding: 0 1.5rem 1.5rem;
  margin: 0;
  color: var(--cfu-text);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ==================================
   CTA
   ================================== */
.cfu-cta {
  background: linear-gradient(135deg, var(--cfu-primary) 0%, #a01a1a 100%);
  color: var(--cfu-white);
  padding: 6rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
/* Background pattern for CTA */
.cfu-cta::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-image: radial-gradient(circle at 100% 0%, rgba(255,255,255,0.15) 0%, transparent 50%),
                    radial-gradient(circle at 0% 100%, rgba(0,0,0,0.2) 0%, transparent 50%);
  pointer-events: none;
}

.cfu-cta h2 {
  color: var(--cfu-white);
  margin-bottom: 1.5rem;
  font-size: 2.8rem;
}
.cfu-cta p {
  font-size: 1.25rem;
  max-width: 650px;
  margin: 0 auto 2.5rem auto;
  color: #ffffff !important;
  opacity: 0.95;
}
.cfu-cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
}
@media (min-width: 992px) {
  .cfu-cta-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  .cfu-cta p {
    margin: 0;
  }
}
.cfu-cta-actions {
  display: flex;
  gap: 1.25rem;
  margin-top: 2rem;
}
@media (min-width: 992px) {
  .cfu-cta-actions {
    margin-top: 0;
    margin-left: 3rem;
  }
}
.cfu-cta .cfu-btn-primary {
  background: var(--cfu-white);
  color: var(--cfu-primary) !important;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.cfu-cta .cfu-btn-primary:hover {
  background: var(--cfu-dark);
  color: var(--cfu-white) !important;
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

/* ==================================
   RESPONSIVE OVERRIDES
   ================================== */
@media (max-width: 768px) {
  .cfu-hero {
    padding: 5rem 0 3rem;
  }
  .cfu-hero h1 {
    font-size: 2.2rem;
  }
  .cfu-hero-cta {
    flex-direction: column;
  }
  .cfu-section {
    padding: 4rem 0;
  }
  .cfu-section-head {
    margin-bottom: 3rem;
  }
  .cfu-section-num {
    font-size: 3.5rem;
  }
  .cfu-section-head h2 {
    font-size: 2.2rem;
  }
  .cfu-quicknav ul {
    justify-content: flex-start;
  }
  .cfu-cta h2 {
    font-size: 2.2rem;
  }
  .cfu-cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cfu-cta-actions .cfu-btn {
    width: 100%;
  }
}


/* ==================================
   SIDEBAR & CONFIG GRID
   ================================== */
.cfu-fittings-sidebar {
  display: flex;
  flex-direction: column;
}

.cfu-sidebar-box {
  background: var(--cfu-white);
  border: 1px solid var(--cfu-border);
  padding: 1.75rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.02);
}

.cfu-sidebar-box h4 {
  font-family: var(--cfu-font-main);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cfu-dark);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--cfu-border);
}

.cfu-sidebar-box h4 span {
  color: var(--cfu-primary);
  font-size: 1.4rem;
}

.cfu-sidebar-box .cfu-list li {
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.cfu-sidebar-box .cfu-list li::before {
  font-size: 1rem;
  top: 1px;
}

.cfu-config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.cfu-config-grid span {
  background: var(--cfu-light);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cfu-text);
  padding: 0.6rem;
  border-radius: 6px;
  text-align: center;
  border: 1px solid var(--cfu-border);
  transition: all 0.2s;
}

.cfu-config-grid span:hover {
  border-color: var(--cfu-primary);
  color: var(--cfu-primary);
  background: var(--cfu-white);
  box-shadow: 0 4px 8px rgba(224, 36, 36, 0.08);
}

.cfu-sidebar-highlight {
  background: linear-gradient(135deg, var(--cfu-dark) 0%, var(--cfu-dark-secondary) 100%);
  color: var(--cfu-white);
  padding: 2rem;
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.cfu-sidebar-highlight h4 {
  font-family: var(--cfu-font-cond);
  font-size: 1.6rem;
  color: var(--cfu-white);
  margin-bottom: 0.75rem;
}

.cfu-sidebar-highlight p {
  color: #cbd5e1;
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.cfu-sidebar-highlight .cfu-card-link {
  color: var(--cfu-white);
  background: rgba(255,255,255,0.1);
  padding: 0.6rem 1rem;
  border-radius: 4px;
  margin-top: 0;
  display: inline-block;
  border: 1px solid rgba(255,255,255,0.2);
}

.cfu-sidebar-highlight .cfu-card-link:hover {
  background: var(--cfu-primary);
  border-color: var(--cfu-primary);
  color: var(--cfu-white);
}