/* ==========================================================================
   BETA ENERGY DIRECT - MODERN B2B CORPORATE UTILITIES DESIGN SYSTEM
   Clean, Semantic, Accessible, Fast CSS3 Architecture
   No external frameworks. Pure CSS Grid, Flexbox, Container Queries & Variables.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS & CSS CUSTOM PROPERTIES
   -------------------------------------------------------------------------- */
:root {
  /* Brand Core Colors */
  --color-brand-primary: #00A86B;         /* Energized British Utility Green */
  --color-brand-primary-hover: #008f5a;
  --color-brand-primary-light: #e6f7f0;
  --color-brand-secondary: #0a2540;       /* Enterprise Corporate Navy */
  --color-brand-secondary-hover: #05192d;
  --color-brand-accent: #00d494;          /* Vivid Mint / Net-Zero Electric */
  --color-brand-accent-glow: rgba(0, 212, 148, 0.25);
  
  /* B2B Neutral Scale */
  --color-slate-950: #070d17;
  --color-slate-900: #0f172a;
  --color-slate-850: #131e33;
  --color-slate-800: #1e293b;
  --color-slate-700: #334155;
  --color-slate-600: #475569;
  --color-slate-500: #64748b;
  --color-slate-400: #94a3b8;
  --color-slate-300: #cbd5e1;
  --color-slate-200: #e2e8f0;
  --color-slate-100: #f1f5f9;
  --color-slate-50: #f8fafc;
  --color-white: #ffffff;

  /* Semantic Feedback & State Colors */
  --color-success: #059669;
  --color-success-bg: #ecfdf5;
  --color-warning: #d97706;
  --color-warning-bg: #fffbeb;
  --color-info: #0284c7;
  --color-info-bg: #f0f9ff;
  --color-danger: #dc2626;

  /* Typography Scales (Fluid Typography using clamp) */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.825rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.35vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.45vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.15rem + 0.65vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.35rem + 0.95vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.65rem + 1.4vw, 2.375rem);
  --text-4xl: clamp(2.25rem, 1.95rem + 2vw, 3rem);
  --text-5xl: clamp(2.75rem, 2.3rem + 3vw, 4rem);

  /* Line Heights */
  --lh-tight: 1.15;
  --lh-snug: 1.3;
  --lh-normal: 1.55;
  --lh-relaxed: 1.7;

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout Boundaries */
  --container-max-width: 1280px;
  --container-narrow: 840px;
  --header-height: 80px;
  --topbar-height: 40px;

  /* Elevation Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.09), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.07);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);
  --shadow-card-hover: 0 16px 32px -4px rgba(10, 37, 64, 0.14), 0 4px 12px -2px rgba(0, 168, 107, 0.12);

  /* Border Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. MODERN CSS RESET & ACCESSIBILITY BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family-sans);
  font-size: 16px;
  line-height: var(--lh-normal);
  color: var(--color-slate-800);
  background-color: var(--color-slate-50);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--topbar-height) + 1rem);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg, picture {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

/* Skip link for keyboard users (WCAG 2.4.1) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-slate-900);
  color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  z-index: 99999;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-brand-accent);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
  outline: none;
}

/* Accessible Focus Ring */
:focus-visible {
  outline: 3px solid var(--color-brand-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   3. LAYOUT UTILITIES & CONTAINERS
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.section {
  padding-block: var(--space-16);
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-24);
  }
}

.section-dark {
  background-color: var(--color-brand-secondary);
  color: var(--color-white);
}

.section-muted {
  background-color: var(--color-slate-100);
}

.text-center {
  text-align: center;
}

/* Badges & Section Pre-titles */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-primary {
  background-color: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
}

.badge-secondary {
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--color-brand-accent);
  border: 1px solid rgba(0, 212, 148, 0.25);
}

.section-header {
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.section-header .badge {
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: var(--lh-tight);
  color: var(--color-slate-900);
  margin-bottom: var(--space-4);
}

.section-dark .section-title {
  color: var(--color-white);
}

.section-subtitle {
  font-size: var(--text-lg);
  line-height: var(--lh-relaxed);
  color: var(--color-slate-600);
}

.section-dark .section-subtitle {
  color: var(--color-slate-300);
}

/* --------------------------------------------------------------------------
   4. BUTTONS & INTERACTIVE ELEMENTS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.625rem;
  font-size: var(--text-base);
  font-weight: 700;
  line-height: 1;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-brand-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px 0 rgba(0, 168, 107, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-brand-primary-hover);
  box-shadow: 0 6px 20px 0 rgba(0, 168, 107, 0.45);
  transform: translateY(-1px);
}

.btn-accent {
  background-color: var(--color-brand-accent);
  color: var(--color-slate-950);
  font-weight: 800;
  box-shadow: 0 4px 16px 0 var(--color-brand-accent-glow);
}

.btn-accent:hover {
  background-color: #00ea9f;
  transform: translateY(-1px);
  box-shadow: 0 6px 22px 0 rgba(0, 212, 148, 0.4);
}

.btn-secondary {
  background-color: var(--color-brand-secondary);
  color: var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-brand-secondary-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-slate-300);
  color: var(--color-slate-800);
}

.btn-outline:hover {
  border-color: var(--color-slate-800);
  background-color: var(--color-slate-100);
}

.btn-outline-white {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--color-white);
}

.btn-outline-white:hover {
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.btn-sm {
  padding: 0.55rem 1rem;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 1.125rem 2.25rem;
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

/* --------------------------------------------------------------------------
   5. TOPBAR & ACCESSIBLE STICKY NAVIGATION
   -------------------------------------------------------------------------- */
.topbar {
  background-color: var(--color-slate-950);
  color: var(--color-slate-300);
  font-size: var(--text-xs);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  min-height: var(--topbar-height);
  display: flex;
  align-items: center;
}

.topbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-block: var(--space-1);
}

.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.topbar-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.topbar-item a:hover {
  color: var(--color-brand-accent);
}

.topbar-item svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.topbar-badge {
  background-color: rgba(0, 168, 107, 0.2);
  color: var(--color-brand-accent);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

/* Main Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-slate-200);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-4);
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo-img {
  height: 58px;
  width: auto;
  max-width: 250px;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-fast);
}

@media (min-width: 768px) {
  .brand-logo-img {
    height: 66px;
    max-width: 280px;
  }
}

.footer-logo-wrap {
  display: inline-block;
  padding: 8px 16px;
  background-color: rgba(255, 255, 255, 0.98);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  margin-bottom: var(--space-4);
  transition: transform var(--transition-fast);
}

.footer-logo-wrap:hover {
  transform: translateY(-2px);
}

.footer-logo-img {
  height: 56px;
  width: auto;
  display: block;
}

/* Navigation Menu */
.nav-menu {
  display: none;
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-5);
  }
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-slate-700);
  padding: var(--space-2) 0;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-link:hover {
  color: var(--color-brand-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-brand-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* Dropdown & Mega Menu */
.nav-item-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  background: none;
  border: none;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-slate-700);
  padding: var(--space-2) 0;
}

.nav-dropdown-toggle:hover,
.nav-item-dropdown:hover .nav-dropdown-toggle,
.nav-item-dropdown:focus-within .nav-dropdown-toggle {
  color: var(--color-brand-primary);
}

.nav-dropdown-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-item-dropdown:hover .nav-dropdown-toggle svg,
.nav-item-dropdown:focus-within .nav-dropdown-toggle svg {
  transform: rotate(180deg);
}

.mega-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: -220px;
  width: 880px;
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-200);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: 1050;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.nav-item-dropdown:hover .mega-menu,
.nav-item-dropdown:focus-within .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mega-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mega-heading {
  font-size: 0.785rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-brand-secondary);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-brand-primary-light);
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.mega-heading:hover {
  color: var(--color-brand-primary);
}

.mega-heading svg {
  width: 16px;
  height: 16px;
  fill: var(--color-brand-primary);
}

.mega-links {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.mega-link {
  font-size: var(--text-xs);
  color: var(--color-slate-600);
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: block;
  line-height: 1.35;
}

.mega-link:hover {
  background-color: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
  padding-left: 12px;
}

.mega-footer {
  grid-column: 1 / -1;
  padding-top: var(--space-3);
  margin-top: var(--space-2);
  border-top: 1px solid var(--color-slate-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-slate-500);
}

.mega-footer a {
  font-weight: 700;
  color: var(--color-brand-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-phone {
  display: none;
  flex-direction: column;
  text-align: right;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .header-phone {
    display: flex;
  }
}

.header-phone-label {
  font-size: var(--text-xs);
  color: var(--color-slate-500);
  font-weight: 600;
}

.header-phone-number {
  font-size: var(--text-base);
  font-weight: 800;
  color: var(--color-brand-secondary);
}

.header-phone-number:hover {
  color: var(--color-brand-primary);
}

/* Mobile Menu Toggle Button */
.mobile-nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 32px;
  padding: 4px;
  z-index: 1100;
}

@media (min-width: 1024px) {
  .mobile-nav-toggle {
    display: none;
  }
}

.hamburger-line {
  width: 100%;
  height: 2.5px;
  background-color: var(--color-slate-900);
  border-radius: var(--radius-full);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Mobile Drawer Overlay */
.mobile-nav-drawer {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-nav-drawer.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(85vw, 380px);
  background-color: var(--color-white);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  overflow-y: auto;
  z-index: 1060;
}

.mobile-nav-drawer.is-open .mobile-nav-panel {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-slate-200);
}

.mobile-nav-header img {
  height: 52px !important;
  width: auto !important;
  max-width: 220px;
  object-fit: contain;
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.mobile-nav-link {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-slate-800);
  padding-block: var(--space-2);
}

.mobile-nav-link:hover {
  color: var(--color-brand-primary);
}

/* --------------------------------------------------------------------------
   6. HERO SECTION & FAST UTILITY CALCULATOR SWITCHER
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  background: radial-gradient(120% 80% at 85% 15%, #183354 0%, var(--color-brand-secondary) 55%, #051424 100%);
  color: var(--color-white);
  padding-top: var(--space-12);
  padding-bottom: var(--space-20);
  overflow: hidden;
}

/* Ambient glow accent */
.hero::before {
  content: '';
  position: absolute;
  top: -150px;
  right: -100px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 148, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.hero-pretitle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-brand-accent);
  background-color: rgba(0, 212, 148, 0.12);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 212, 148, 0.25);
  width: fit-content;
}

.hero-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: -0.025em;
  color: var(--color-white);
}

.hero-title .highlight {
  background: linear-gradient(135deg, #00d494 0%, #a7f3d0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: var(--text-lg);
  line-height: var(--lh-relaxed);
  color: var(--color-slate-300);
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-2);
}

/* Hero Stats Strip */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

@media (min-width: 640px) {
  .hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
}

.stat-value span {
  color: var(--color-brand-accent);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-slate-400);
  font-weight: 500;
  margin-top: 4px;
}

/* Quick Quote Card Widget (Hero) */
.hero-widget-card {
  background-color: var(--color-white);
  color: var(--color-slate-900);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}

@media (min-width: 640px) {
  .hero-widget-card {
    padding: var(--space-8);
  }
}

.widget-header {
  margin-bottom: var(--space-6);
  text-align: center;
}

.widget-title {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: var(--space-2);
}

.widget-subtitle {
  font-size: var(--text-sm);
  color: var(--color-slate-600);
}

/* Fuel / Utility Selector Tabs */
.utility-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  background-color: var(--color-slate-100);
  padding: 4px;
  border-radius: var(--radius-md);
}

.tab-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.65rem 0.5rem;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-slate-700);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.tab-btn svg {
  width: 16px;
  height: 16px;
}

.tab-btn.active {
  background-color: var(--color-white);
  color: var(--color-brand-primary);
  box-shadow: var(--shadow-sm);
}

/* Form Controls */
.form-group {
  margin-bottom: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-slate-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-input, .form-select {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1.5px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  background-color: var(--color-slate-50);
  font-size: var(--text-sm);
  color: var(--color-slate-900);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-select:focus {
  border-color: var(--color-brand-primary);
  background-color: var(--color-white);
  box-shadow: 0 0 0 3px rgba(0, 168, 107, 0.15);
  outline: none;
}

.form-help {
  font-size: var(--text-xs);
  color: var(--color-slate-500);
}

.widget-trust-points {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-slate-100);
  font-size: var(--text-xs);
  color: var(--color-slate-500);
}

.widget-trust-points span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.widget-trust-points svg {
  width: 14px;
  height: 14px;
  fill: var(--color-brand-primary);
}

/* --------------------------------------------------------------------------
   7. TRUST ACCREDITATION & REGULATORY RIBBON
   -------------------------------------------------------------------------- */
.trust-ribbon {
  background-color: var(--color-white);
  padding-block: var(--space-8);
  border-bottom: 1px solid var(--color-slate-200);
}

.trust-ribbon-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: center;
}

.trust-ribbon-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-slate-500);
  text-align: center;
}

.trust-badges-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
}

.trust-badge-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-slate-700);
}

.trust-badge-item svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  fill: var(--color-brand-primary);
}

.trust-badge-text strong {
  display: block;
  color: var(--color-slate-900);
  font-size: var(--text-sm);
}

/* Suppliers Ribbon */
.supplier-logo-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-6);
  width: 100%;
  padding-top: var(--space-4);
}

.supplier-pill {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-slate-500);
  padding: 0.5rem 1rem;
  background-color: var(--color-white);
  border: 1px dashed var(--color-slate-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.supplier-pill:hover {
  color: var(--color-brand-secondary);
  border-color: var(--color-brand-primary);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   8. INTERACTIVE UTILITY CALCULATOR & SAVINGS ESTIMATOR
   -------------------------------------------------------------------------- */
.calculator-section {
  background-color: var(--color-slate-900);
  color: var(--color-white);
  position: relative;
}

.calc-container {
  background-color: var(--color-slate-850);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-xl);
}

@media (min-width: 1024px) {
  .calc-container {
    padding: var(--space-10);
  }
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 1024px) {
  .calc-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.calc-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.calc-control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.calc-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.calc-label {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-slate-200);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.calc-value-display {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-brand-accent);
}

/* Range Slider Styling */
.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: var(--color-slate-700);
  border-radius: var(--radius-full);
  outline: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-brand-accent);
  cursor: pointer;
  box-shadow: 0 0 12px var(--color-brand-accent-glow);
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.range-slider::-moz-range-thumb {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-brand-accent);
  cursor: pointer;
  box-shadow: 0 0 12px var(--color-brand-accent-glow);
  border: none;
}

/* Industry Selector Buttons */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}

@media (min-width: 640px) {
  .industry-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.industry-btn {
  padding: 0.75rem 0.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-slate-700);
  background-color: var(--color-slate-800);
  color: var(--color-slate-300);
  font-size: var(--text-xs);
  font-weight: 600;
  text-align: center;
  transition: all var(--transition-fast);
}

.industry-btn:hover {
  background-color: var(--color-slate-700);
  color: var(--color-white);
}

.industry-btn.active {
  background-color: rgba(0, 212, 148, 0.15);
  border-color: var(--color-brand-accent);
  color: var(--color-brand-accent);
  font-weight: 700;
}

/* Calculator Results Display Card */
.calc-result-box {
  background: linear-gradient(145deg, #132742, #0d1e33);
  border: 1px solid rgba(0, 212, 148, 0.3);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.calc-result-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-6);
}

.calc-result-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-brand-accent);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.calc-savings-amount {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 900;
  color: var(--color-white);
  line-height: 1;
}

.calc-savings-sub {
  font-size: var(--text-sm);
  color: var(--color-slate-400);
  margin-top: var(--space-1);
}

.calc-breakdown-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.calc-breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  color: var(--color-slate-300);
}

.calc-breakdown-row strong {
  color: var(--color-white);
  font-size: var(--text-base);
}

/* --------------------------------------------------------------------------
   9. CORE B2B SERVICES & SOLUTIONS MATRIX
   -------------------------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Container Queries for Service Cards */
.service-card-wrapper {
  container-type: inline-size;
}

.service-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--color-slate-200);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all var(--transition-normal);
  position: relative;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 168, 107, 0.4);
  box-shadow: var(--shadow-card-hover);
}

.service-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background-color: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  transition: all var(--transition-normal);
}

.service-card:hover .service-icon-box {
  background-color: var(--color-brand-primary);
  color: var(--color-white);
}

.service-icon-box svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.service-title {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: var(--space-3);
}

.service-desc {
  font-size: var(--text-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-slate-600);
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.service-features-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-slate-100);
}

.service-feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-slate-700);
}

.service-feature-item svg {
  width: 16px;
  height: 16px;
  fill: var(--color-brand-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.service-card-action {
  margin-top: auto;
}

/* --------------------------------------------------------------------------
   10. WHY CHOOSE BETA & THE CORPORATE ADVANTAGE
   -------------------------------------------------------------------------- */
.advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .advantages-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.advantage-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background-color: var(--color-slate-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-200);
}

.advantage-number {
  font-size: var(--text-3xl);
  font-weight: 900;
  color: var(--color-brand-primary);
  line-height: 1;
}

.advantage-title {
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-slate-900);
}

.advantage-desc {
  font-size: var(--text-sm);
  color: var(--color-slate-600);
  line-height: var(--lh-normal);
}

/* --------------------------------------------------------------------------
   11. THE 3-STEP SEAMLESS PROCUREMENT FRAMEWORK
   -------------------------------------------------------------------------- */
.process-steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  position: relative;
}

@media (min-width: 768px) {
  .process-steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  background-color: var(--color-white);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-200);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.step-indicator {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--color-brand-secondary);
  color: var(--color-brand-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  font-weight: 800;
}

.step-title {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-slate-900);
}

.step-desc {
  font-size: var(--text-sm);
  color: var(--color-slate-600);
  line-height: var(--lh-relaxed);
}

/* --------------------------------------------------------------------------
   12. CASE STUDIES & CLIENT ROI BREAKDOWNS
   -------------------------------------------------------------------------- */
.case-studies-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .case-studies-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.case-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-200);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.case-card-header {
  background-color: var(--color-slate-900);
  color: var(--color-white);
  padding: var(--space-6);
}

.case-industry {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-brand-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.case-company {
  font-size: var(--text-lg);
  font-weight: 800;
}

.case-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex-grow: 1;
}

.case-metrics-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-slate-100);
}

.case-metric-box {
  display: flex;
  flex-direction: column;
}

.case-metric-num {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-brand-primary);
}

.case-metric-label {
  font-size: var(--text-xs);
  color: var(--color-slate-500);
}

.case-quote {
  font-size: var(--text-sm);
  font-style: italic;
  color: var(--color-slate-600);
  line-height: var(--lh-normal);
}

.case-author {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-slate-800);
  font-style: normal;
}

/* --------------------------------------------------------------------------
   13. COMPLIANCE & TPI TRANSPARENCY NOTICE
   -------------------------------------------------------------------------- */
.compliance-box {
  background-color: #fff9f0;
  border: 1.5px solid #fde0b2;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .compliance-box {
    flex-direction: row;
    align-items: center;
    gap: var(--space-8);
  }
}

.compliance-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: #fef3c7;
  color: #b45309;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.compliance-icon svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.compliance-text {
  flex-grow: 1;
}

.compliance-title {
  font-size: var(--text-lg);
  font-weight: 800;
  color: #78350f;
  margin-bottom: var(--space-2);
}

.compliance-desc {
  font-size: var(--text-sm);
  line-height: var(--lh-relaxed);
  color: #92400e;
}

/* --------------------------------------------------------------------------
   14. ACCESSIBLE ACCORDION FAQS (HTML5 DETAILS/SUMMARY)
   -------------------------------------------------------------------------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 860px;
  margin-inline: auto;
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-slate-400);
}

.faq-item[open] {
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-sm);
}

.faq-summary {
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-slate-900);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  list-style: none; /* removes default browser arrow */
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-icon-indicator {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
  color: var(--color-brand-primary);
}

.faq-icon-indicator svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.faq-item[open] .faq-icon-indicator {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 var(--space-6) var(--space-6) var(--space-6);
  font-size: var(--text-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-slate-600);
  border-top: 1px solid var(--color-slate-100);
  padding-top: var(--space-4);
}

/* --------------------------------------------------------------------------
   15. BOTTOM CONVERSION BANNER & MODAL
   -------------------------------------------------------------------------- */
.cta-banner {
  background: radial-gradient(100% 100% at 50% 0%, #152b47 0%, var(--color-brand-secondary) 100%);
  color: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-12) var(--space-6);
  text-align: center;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .cta-banner {
    padding: var(--space-16) var(--space-12);
  }
}

.cta-banner-content {
  max-width: 760px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.cta-banner-title {
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: var(--lh-tight);
}

.cta-banner-desc {
  font-size: var(--text-lg);
  color: var(--color-slate-300);
}

/* --------------------------------------------------------------------------
   16. B2B CORPORATE FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-slate-950);
  color: var(--color-slate-400);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
  font-size: var(--text-sm);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  }
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-brand .brand-name {
  color: var(--color-white);
}

.footer-col-title {
  font-size: var(--text-base);
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  color: var(--color-slate-400);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-brand-accent);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--color-slate-300);
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  fill: var(--color-brand-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-slate-500);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-legal-links a:hover {
  color: var(--color-slate-300);
}

/* --------------------------------------------------------------------------
   17. INTERACTIVE TOAST FEEDBACK NOTIFICATION
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background-color: var(--color-slate-900);
  color: var(--color-white);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--color-brand-primary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  animation: toastIn 300ms ease-out forwards;
}

@keyframes toastIn {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* --------------------------------------------------------------------------
   18. SUBPAGE HEROES, BREADCRUMBS & RICH MEDIA
   -------------------------------------------------------------------------- */
.page-hero {
  background: radial-gradient(120% 80% at 85% 15%, #183354 0%, var(--color-brand-secondary) 55%, #051424 100%);
  color: var(--color-white);
  padding-block: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-slate-400);
  margin-bottom: var(--space-4);
}

.breadcrumb a {
  color: var(--color-brand-accent);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--color-slate-500);
}

.card-img-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 16 / 9;
  background-color: var(--color-slate-800);
  margin-bottom: var(--space-4);
}

.card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.service-card:hover .card-img-wrapper img,
.blog-card:hover .card-img-wrapper img {
  transform: scale(1.04);
}

/* --------------------------------------------------------------------------
   19. BLOG GRID & SINGLE ARTICLE LAYOUT
   -------------------------------------------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 640px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-200);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.blog-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 168, 107, 0.4);
  box-shadow: var(--shadow-card-hover);
}

.blog-card-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-grow: 1;
}

.blog-meta-strip {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-slate-500);
}

.blog-pill {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-brand-primary);
  background-color: var(--color-brand-primary-light);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.blog-card-title {
  font-size: var(--text-lg);
  font-weight: 800;
  line-height: var(--lh-snug);
  color: var(--color-slate-900);
}

.blog-card-title a:hover {
  color: var(--color-brand-primary);
}

.blog-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-slate-600);
  line-height: var(--lh-relaxed);
  flex-grow: 1;
}

/* Article Template */
.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .article-grid {
    grid-template-columns: 2.2fr 1fr;
  }
}

.article-content {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-200);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .article-content {
    padding: var(--space-12);
  }
}

.article-content h2 {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-slate-900);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  line-height: var(--lh-tight);
}

.article-content h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-slate-800);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.article-content p {
  font-size: var(--text-base);
  line-height: var(--lh-relaxed);
  color: var(--color-slate-700);
  margin-bottom: var(--space-5);
}

.article-content ul, .article-content ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.article-content li {
  font-size: var(--text-base);
  line-height: var(--lh-relaxed);
  color: var(--color-slate-700);
  margin-bottom: var(--space-2);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-block: var(--space-6);
  font-size: var(--text-sm);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.article-content th,
.article-content td {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-slate-200);
  text-align: left;
  line-height: var(--lh-snug);
}

.article-content th {
  background-color: var(--color-slate-100);
  font-weight: 700;
  color: var(--color-brand-secondary);
}

.article-content blockquote {
  border-left: 4px solid var(--color-brand-primary);
  padding: var(--space-4) var(--space-6);
  margin-block: var(--space-6);
  background-color: var(--color-slate-50);
  font-style: italic;
  color: var(--color-slate-700);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin-block: var(--space-6);
  display: block;
}

.article-callout {
  background-color: var(--color-brand-primary-light);
  border-left: 4px solid var(--color-brand-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin-block: var(--space-6);
}

.article-callout h4 {
  font-size: var(--text-base);
  font-weight: 800;
  color: var(--color-brand-secondary);
  margin-bottom: var(--space-2);
}

.article-callout p {
  margin-bottom: 0;
  color: var(--color-slate-800);
  font-size: var(--text-sm);
}

/* Sidebar Widgets */
.sidebar-sticky {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: sticky;
  top: calc(var(--header-height) + var(--topbar-height) + 1.5rem);
}

.sidebar-widget {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-200);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.sidebar-widget-title {
  font-size: var(--text-base);
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-slate-100);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--text-xs);
}

.toc-list a {
  color: var(--color-slate-600);
  line-height: var(--lh-snug);
  display: block;
}

.toc-list a:hover {
  color: var(--color-brand-primary);
  font-weight: 600;
}

/* Contact Page Layout */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1.2fr;
  }
}

/* --------------------------------------------------------------------------
   20. FAQ FILTER TABS & SERVICE SPECIFICATION CARDS
   -------------------------------------------------------------------------- */
.faq-filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
}

.faq-filter-btn {
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-slate-300);
  background-color: var(--color-white);
  color: var(--color-slate-700);
  font-size: var(--text-sm);
  font-weight: 700;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.faq-filter-btn:hover {
  border-color: var(--color-brand-primary);
  color: var(--color-brand-primary);
  background-color: var(--color-brand-primary-light);
}

.faq-filter-btn.active {
  background-color: var(--color-brand-secondary);
  border-color: var(--color-brand-secondary);
  color: var(--color-brand-accent);
  box-shadow: var(--shadow-sm);
}

.faq-category-block {
  margin-bottom: var(--space-12);
}

.faq-category-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-slate-200);
}

.faq-category-header svg {
  width: 24px;
  height: 24px;
  fill: var(--color-brand-primary);
}

.faq-category-header h3 {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-slate-900);
}

/* Child Services Grid */
.child-services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .child-services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .child-services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.child-service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.child-service-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-card-hover);
}

.child-service-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-brand-primary);
  background-color: var(--color-brand-primary-light);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
  width: fit-content;
}

.child-service-card h4 {
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: var(--space-2);
}

.child-service-card p {
  font-size: var(--text-sm);
  color: var(--color-slate-600);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-5);
  flex-grow: 1;
}

/* Service Detail Specs Box */
.spec-box {
  background-color: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-slate-200);
}

.spec-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.spec-label {
  color: var(--color-slate-600);
  font-weight: 600;
}

.spec-value {
  color: var(--color-slate-900);
  font-weight: 800;
}

/* Responsive Grid Utility */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}
@media (min-width: 900px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-12);
  }
}

.service-feature-img {
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.service-showcase-img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

/* Mobile Nav Accordion */
.mobile-nav-group-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-brand-primary);
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
  display: block;
}

.mobile-sub-link {
  font-size: var(--text-sm);
  color: var(--color-slate-700);
  padding-left: var(--space-4);
  padding-block: 4px;
  display: block;
}

.mobile-sub-link:hover {
  color: var(--color-brand-primary);
}

/* --------------------------------------------------------------------------
   21. ACCESSIBILITY & PREFERS-REDUCED-MOTION
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------------------
   19. PRINT STYLESHEET
   -------------------------------------------------------------------------- */
@media print {
  .topbar, .site-header, .mobile-nav-toggle, .btn, .calc-controls, .toast-container {
    display: none !important;
  }
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }
  .section {
    padding-block: 1rem !important;
  }
}