:root {
  --bct-navy: #0f2a44;
  --bct-navy-2: #12365a;
  --bct-orange: #f97316;
  --bct-orange-2: #ea580c;
  --bct-bg: #f3f6fa;
  --bct-surface: #ffffff;
  --bct-text: #1f2937;
  --bct-muted: #64748b;
  --bct-border: #d6dee8;
}

html {
  font-size: 16px;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--bct-text);
  background: var(--bct-bg);
  line-height: 1.6;
}

h1,
h2,
h3 {
  font-weight: 700;
  color: var(--bct-navy);
}

a {
  color: var(--bct-navy);
  text-decoration-color: rgba(15, 42, 68, 0.35);
}

a:hover,
a:focus {
  color: var(--bct-orange-2);
  text-decoration-color: rgba(234, 88, 12, 0.45);
}

main {
  flex: 1;
}

.site-container {
  max-width: 1160px;
}

.site-header {
  border-bottom: 1px solid var(--bct-border);
  background: #fff;
}

.site-tagline-wrap {
  border-top: 1px solid #eef2f6;
  background: var(--bct-navy);
}

.site-tagline {
  font-size: 0.925rem;
  color: #fff;
  padding: 0.55rem 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.3rem;
  height: 2.3rem;
  border-radius: 0;
  background: var(--bct-orange);
  color: #111827;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  font-weight: 700;
}

.navbar-brand {
  font-size: 1.1rem;
}

.brand-logo {
  height: 62px;
  width: auto;
  display: block;
}

@media (max-width: 576px) {
  .brand-logo {
    height: 44px;
  }
}

.site-header .navbar-brand,
.site-header .navbar-brand span {
  color: var(--bct-navy) !important;
}

.site-header .navbar .nav-link {
  font-weight: 600;
  color: var(--bct-navy);
  border-bottom: 2px solid transparent;
  padding-bottom: 0.35rem;
}

.site-header .navbar .nav-link:hover,
.site-header .navbar .nav-link:focus {
  color: var(--bct-navy-2);
  border-bottom-color: rgba(249, 115, 22, 0.55);
}

.site-header .navbar .nav-link.active {
  color: var(--bct-navy-2);
  border-bottom-color: var(--bct-orange);
}

.site-header .navbar-toggler {
  border-color: var(--bct-border);
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--bct-navy);
  color: rgba(255, 255, 255, 0.9);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.92);
}

.site-footer a:hover,
.site-footer a:focus {
  color: #fff;
}

.disclaimer-strip {
  border-top: 3px solid var(--bct-orange);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  background: var(--bct-navy);
  color: #fff;
}

.hero-section {
  padding: 2.25rem 1.5rem;
  border: 1px solid var(--bct-border);
  border-radius: 0;
  background: linear-gradient(145deg, #ffffff 0%, var(--bct-bg) 100%);
}

.btn,
.card,
.alert,
.accordion-item,
.form-control,
.form-select {
  border-radius: 0;
}

.shadow-soft {
  box-shadow: 0 8px 20px rgba(15, 42, 68, 0.08);
}

.btn-bct-primary {
  background: var(--bct-orange);
  border-color: var(--bct-orange);
  color: #fff;
  font-weight: 700;
}

.btn-bct-primary:hover,
.btn-bct-primary:focus {
  background: var(--bct-orange-2);
  border-color: var(--bct-orange-2);
  color: #fff;
}

.btn-bct-outline {
  border: 1px solid var(--bct-navy);
  color: var(--bct-navy);
  background: transparent;
  font-weight: 600;
}

.btn-bct-outline:hover,
.btn-bct-outline:focus {
  border-color: var(--bct-navy-2);
  color: #fff;
  background: var(--bct-navy-2);
}

.site-header .btn-bct-outline {
  border-color: rgba(255, 255, 255, 0.65);
  color: #fff;
}

.site-header .btn-bct-outline:hover,
.site-header .btn-bct-outline:focus {
  border-color: var(--bct-orange);
  background: var(--bct-orange);
  color: #fff;
}

.btn-primary {
  background: var(--bct-orange);
  border-color: var(--bct-orange);
  color: #fff;
  font-weight: 700;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--bct-orange-2);
  border-color: var(--bct-orange-2);
  color: #fff;
}

.hero-cta-btn {
  min-width: 220px;
  box-shadow: 0 8px 18px rgba(234, 88, 12, 0.2);
}

.hero-cta-btn:hover,
.hero-cta-btn:focus {
  box-shadow: 0 10px 22px rgba(234, 88, 12, 0.28);
}

.calc-card {
  border-color: var(--bct-border);
  background: var(--bct-surface);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  box-shadow: 0 2px 8px rgba(15, 42, 68, 0.04);
  border-top: 4px solid var(--bct-navy);
}

.calc-card-electrical {
  border-top-color: var(--bct-orange);
}

.calc-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(15, 42, 68, 0.12);
}

.calculator-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--bct-navy-2);
}

.featured-group {
  padding-bottom: 0.75rem;
  border-bottom: 1px solid #eef2f7;
}

.featured-group:last-of-type {
  border-bottom: 0;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--bct-border);
  border-radius: 0;
  background: var(--bct-surface);
}

.task-icon {
  width: 1.9rem;
  height: 1.9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  background: #e7eef7;
  color: var(--bct-navy);
}

.task-icon svg {
  fill: currentColor;
}

.task-column {
  padding: 1rem;
  border: 1px solid var(--bct-border);
  border-radius: 0;
  background: var(--bct-surface);
}

.task-column ul {
  padding-left: 1.15rem;
}

.task-column li + li {
  margin-top: 0.5rem;
}

.step-card {
  height: 100%;
  border: 1px solid var(--bct-border);
  border-radius: 0;
  background: var(--bct-surface);
  padding: 1rem;
}

.step-number {
  margin-bottom: 0.55rem;
  font-weight: 700;
  color: var(--bct-orange-2);
}

.pro-callout {
  border: 1px solid #f2d0b7;
  border-radius: 0;
  background: #fff6ef;
  padding: 1rem 1.1rem;
}

.hub-hero {
  padding: 1.5rem 1.25rem;
  border: 1px solid var(--bct-border);
  border-radius: 0;
  background: var(--bct-surface);
}

.calculator-count-badge {
  background: #e5e7eb !important;
  color: var(--bct-text) !important;
  border-color: #cbd5e1 !important;
}

.hub-sidebar {
  position: sticky;
  top: 1rem;
}

.result-html p {
  margin-bottom: 0.5rem;
}

.print-only-header {
  display: none;
}

.print-mode .print-only-header {
  display: block;
}

textarea#result-summary {
  min-height: 5.5rem;
}

.result-panel {
  background: var(--bct-surface);
  border: 1px solid var(--bct-border);
  border-left: 6px solid var(--bct-orange);
  border-radius: 0;
}

.calc-validation-alert {
  border: 1px solid #f7b78d;
  background: #fff1e8;
  color: #7c2d12;
}

.form-label {
  font-weight: 600;
  color: var(--bct-navy);
}

.form-text,
.text-muted {
  color: var(--bct-muted) !important;
}

.input-guide-row {
  margin-bottom: 0.85rem;
}

.input-guide-link {
  color: var(--bct-navy) !important;
  text-decoration: none !important;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.input-guide-link:hover,
.input-guide-link:focus {
  color: var(--bct-orange) !important;
  text-decoration: underline !important;
}

.input-guide-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 0.7rem;
  line-height: 1;
  font-weight: 700;
}

@media print {
  .no-print,
  header,
  footer,
  .navbar,
  .site-tagline-wrap,
  .breadcrumb {
    display: none !important;
  }

  body {
    background: #fff;
    color: #111827;
  }

  main.container {
    max-width: 100%;
    padding: 0 !important;
  }

  .card {
    border: 1px solid #d1d5db !important;
    box-shadow: none !important;
    break-inside: avoid;
    background: #fff !important;
  }

  .result-panel {
    border-left: 1px solid #d1d5db !important;
  }

  .print-only-header {
    display: block !important;
  }

  .accordion .accordion-collapse {
    display: block !important;
  }
}

@media (max-width: 767.98px) {
  .hero-section {
    padding: 1.5rem 1rem;
  }

  .site-tagline {
    font-size: 0.86rem;
  }
}