/* ==========================================================================
   FJD CONSULTING — DESIGN SYSTEM & CORE STYLESHEET
   Playbook: Professional & B2B Services (Variant C: Approachable Expert)
   Locality: Birmingham (Jewellery Quarter) & Bristol, UK
   Standards: Modern Fluid CSS Grid/Flexbox, WCAG AA Compliant, Mobile-First
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Strict Palette from design_brief.json */
  --color-background: #f9f8f5;
  --color-surface: #ffffff;
  --color-text: #11222f;
  --color-muted: #526674;
  --color-primary: #004f6f;
  --color-primary-text: #ffffff;
  --color-accent: #d97706;
  --color-dark: #0a1d28;
  --color-dark-text: #ffffff;

  /* Derived functional shades using exact brand hues */
  --color-border: color-mix(in srgb, var(--color-muted) 25%, transparent);
  --color-border-subtle: color-mix(in srgb, var(--color-muted) 15%, transparent);
  --color-primary-hover: color-mix(in srgb, var(--color-primary) 85%, #000000);
  --color-primary-subtle: color-mix(in srgb, var(--color-primary) 10%, var(--color-surface));
  --color-accent-subtle: color-mix(in srgb, var(--color-accent) 12%, var(--color-surface));
  --color-dark-card: color-mix(in srgb, var(--color-dark) 90%, #ffffff);

  /* Typography Stack */
  --font-display: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Figtree', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Fluid Type Scale (clamp) */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --font-size-sm: clamp(0.875rem, 0.825rem + 0.25vw, 0.9375rem);
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --font-size-md: clamp(1.125rem, 1.05rem + 0.4vw, 1.25rem);
  --font-size-lg: clamp(1.25rem, 1.15rem + 0.55vw, 1.4375rem);
  --font-size-xl: clamp(1.5rem, 1.35rem + 0.8vw, 1.75rem);
  --font-size-2xl: clamp(1.875rem, 1.65rem + 1.2vw, 2.25rem);
  --font-size-3xl: clamp(2.25rem, 1.95rem + 1.8vw, 3rem);
  --font-size-4xl: clamp(2.75rem, 2.3rem + 2.4vw, 3.75rem);

  /* Spacing Scale */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 6rem;

  /* Layout Boundaries */
  --container-max: 1240px;
  --container-padding: clamp(1rem, 4vw, 2rem);
  --header-height: 76px;

  /* Rounded Container Radii (Variant C signature) */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Refined Architectural Shadows */
  --shadow-sm: 0 1px 3px rgba(10, 29, 40, 0.06), 0 1px 2px rgba(10, 29, 40, 0.04);
  --shadow-md: 0 4px 8px -2px rgba(10, 29, 40, 0.08), 0 2px 4px -2px rgba(10, 29, 40, 0.05);
  --shadow-lg: 0 12px 24px -4px rgba(10, 29, 40, 0.1), 0 4px 8px -2px rgba(10, 29, 40, 0.06);
  --shadow-xl: 0 20px 32px -6px rgba(10, 29, 40, 0.12), 0 8px 12px -3px rgba(10, 29, 40, 0.08);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Modern Reset & Base Rules
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

/* Ensure no horizontal scrolling without disabling sticky headers */
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip; /* clip protects sticky headers unlike overflow-x: hidden */
}

/* Accessible Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-dark);
  color: var(--color-dark-text);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 99999;
  text-decoration: none;
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Focus Visibility Standard */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-text);
  line-height: 1.15;
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.025em;
  font-weight: 800;
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.02em;
}

h3 {
  font-size: var(--font-size-2xl);
  letter-spacing: -0.015em;
}

h4 {
  font-size: var(--font-size-xl);
  letter-spacing: -0.01em;
}

h5 {
  font-size: var(--font-size-lg);
}

p {
  color: var(--color-text);
  margin-bottom: var(--space-md);
  max-width: 72ch;
}

p.lead {
  font-size: var(--font-size-md);
  line-height: 1.65;
  color: var(--color-muted);
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration-thickness: 2px;
}

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

ul, ol {
  list-style-position: inside;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section-padding {
  padding-block: var(--space-3xl);
}

.section-padding-sm {
  padding-block: var(--space-2xl);
}

.section-header {
  margin-bottom: var(--space-2xl);
}

.section-header.text-center {
  text-align: center;
  max-width: 780px;
  margin-inline: auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
  background-color: var(--color-primary-subtle);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
}

.eyebrow-accent {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
}

.eyebrow-dark {
  color: var(--color-accent);
  background-color: rgba(217, 119, 6, 0.15);
}

/* --------------------------------------------------------------------------
   3. Buttons & Interactive Controls
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 48px; /* Touch target minimum */
  line-height: 1.2;
  white-space: nowrap;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
  border-color: var(--color-primary);
  box-shadow: 0 2px 4px rgba(0, 79, 111, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-primary-text);
  box-shadow: 0 4px 10px rgba(0, 79, 111, 0.3);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-background);
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
  box-shadow: 0 2px 6px rgba(217, 119, 6, 0.25);
}

.btn-accent:hover {
  background-color: color-mix(in srgb, var(--color-accent) 85%, #000);
  border-color: color-mix(in srgb, var(--color-accent) 85%, #000);
  color: #ffffff;
  text-decoration: none;
}

.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
  color: #ffffff;
  text-decoration: none;
}

.btn-sm {
  padding: 0.55rem 1.1rem;
  font-size: var(--font-size-xs);
  min-height: 40px;
}

.btn-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   4. Header & Navigation (Sticky & Pinned at all times)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background-color: rgba(249, 248, 245, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.scrolled {
  background-color: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-sm);
}

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

/* Logo link (at start of header, links to index.html) */
.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  padding-block: var(--space-xs);
}

.brand-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.brand-symbol {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
}

.brand-subtitle {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

/* Desktop Nav (Does NOT contain "Home") */
.desktop-nav {
  display: none;
  align-items: center;
  gap: var(--space-md);
}

@media (min-width: 900px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.25rem;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.85rem;
  color: var(--color-text);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 700;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.85rem;
  right: 0.85rem;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

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

/* Mobile Menu Toggle Button */
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  transition: background-color var(--transition-fast);
}

.menu-toggle:hover {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

@media (min-width: 900px) {
  .menu-toggle {
    display: none;
  }
}

.menu-icon {
  width: 24px;
  height: 24px;
}

/* Mobile Drawer (No "Home" item) */
.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  inset-inline: 0;
  bottom: 0;
  background-color: var(--color-surface);
  padding: var(--space-lg) var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  overflow-y: auto;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
  z-index: 999;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.95rem 1rem;
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border-color: var(--color-border-subtle);
  text-decoration: none;
}

.mobile-contact-block {
  margin-top: auto;
  padding: var(--space-md);
  background-color: var(--color-background);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   5. Hero Section (Colour-Field Layout)
   -------------------------------------------------------------------------- */
.hero-colourfield {
  position: relative;
  background: linear-gradient(145deg, var(--color-dark) 0%, #0d2737 45%, var(--color-primary) 100%);
  color: var(--color-dark-text);
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
  overflow: hidden;
}

.hero-schematic-bg {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(217, 119, 6, 0.4) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, rgba(0, 79, 111, 0.8) 0%, transparent 35%);
  pointer-events: none;
}

.hero-grid-pattern {
  position: absolute;
  inset: 0;
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 960px;
}

.hero-proof-badge {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-lg);
}

.hero-proof-badge .star-rating {
  color: #fbbf24;
  letter-spacing: 0.1em;
}

.hero-proof-badge .divider {
  opacity: 0.4;
}

.hero-headline {
  color: #ffffff;
  font-size: var(--font-size-4xl);
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: var(--space-md);
  text-wrap: balance;
}

.hero-subheadline {
  color: rgba(255, 255, 255, 0.88);
  font-size: var(--font-size-lg);
  line-height: 1.6;
  max-width: 820px;
  margin-bottom: var(--space-xl);
}

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

.hero-stats-band {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat-card {
  display: flex;
  flex-direction: column;
}

.hero-stat-number {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
}

.hero-stat-label {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.7);
  margin-top: 0.25rem;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   6. Accreditations & Partners Bar
   -------------------------------------------------------------------------- */
.accreditations-section {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border-subtle);
  padding-block: var(--space-xl);
}

.accreditations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: var(--space-md);
  align-items: stretch;
}

.accreditation-pill {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1.15rem;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

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

.accreditation-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
}

.accreditation-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.accreditation-title {
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.accreditation-desc {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
}

.partners-wrap {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px dashed var(--color-border);
}

.partners-title {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--color-muted);
  text-align: center;
  margin-bottom: var(--space-md);
}

.partners-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
}

.partner-chip {
  padding: 0.4rem 0.9rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   7. Core Disciplines / Services Grid
   -------------------------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

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

.service-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.service-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.service-card p {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.service-capabilities {
  list-style: none;
  margin-bottom: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-block: var(--space-sm);
  border-top: 1px solid var(--color-border-subtle);
}

.service-capabilities li {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.service-capabilities li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 800;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.card-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   8. Signature Section: The Infrastructure Delivery Roadmap (Variant C)
   -------------------------------------------------------------------------- */
.signature-section {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
  position: relative;
  overflow: hidden;
}

.signature-section .section-header h2 {
  color: #ffffff;
}

.signature-section .section-header p.lead {
  color: rgba(255, 255, 255, 0.8);
}

/* Roadmap Stage Tabs */
.roadmap-tabs {
  display: flex;
  overflow-x: auto;
  gap: var(--space-xs);
  padding-bottom: var(--space-xs);
  margin-bottom: var(--space-xl);
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent) var(--color-dark);
}

.roadmap-tab-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.7);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.roadmap-tab-btn .step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.roadmap-tab-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.roadmap-tab-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.roadmap-tab-btn.active .step-num {
  background: #ffffff;
  color: var(--color-accent);
}

/* Roadmap Panel Content */
.roadmap-panels {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.roadmap-panel {
  display: none;
  animation: fadeIn 300ms ease-out forwards;
}

.roadmap-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-header-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: var(--space-lg);
}

.panel-stage-badge {
  color: var(--color-accent);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.panel-header-wrap h3 {
  color: #ffffff;
  font-size: var(--font-size-2xl);
}

.panel-grid-three {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.panel-column-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.column-box-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.column-box-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.column-box-list li {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.45;
  position: relative;
  padding-left: 1.25rem;
}

.column-box-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 1.25rem;
  line-height: 1;
}

/* --------------------------------------------------------------------------
   9. Featured Case Studies & Quantified Projects
   -------------------------------------------------------------------------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

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

.project-blueprint-header {
  background: linear-gradient(135deg, var(--color-dark) 0%, #153448 100%);
  color: #ffffff;
  padding: var(--space-lg);
  position: relative;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-sm);
}

.project-tag {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-tag.accent {
  background: var(--color-accent);
  color: #ffffff;
}

.project-blueprint-header h3 {
  color: #ffffff;
  font-size: var(--font-size-xl);
  line-height: 1.25;
}

.project-card-body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  flex-grow: 1;
}

.project-metric-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  background-color: var(--color-background);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
}

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

.metric-label {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  font-weight: 500;
}

.metric-value {
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-primary);
}

.project-narrative {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   10. Carbon & Sustainability Section
   -------------------------------------------------------------------------- */
.sustainability-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #002f43 100%);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 5vw, 3.5rem);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 900px) {
  .sustainability-banner {
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
  }
}

.sustainability-banner h2 {
  color: #ffffff;
  margin-bottom: var(--space-md);
}

.sustainability-banner p {
  color: rgba(255, 255, 255, 0.9);
}

.sustainability-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sustainability-item {
  display: flex;
  gap: var(--space-sm);
  background: rgba(255, 255, 255, 0.08);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.sustainability-item-icon {
  color: var(--color-accent);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.sustainability-item h4 {
  color: #ffffff;
  font-size: var(--font-size-md);
  margin-bottom: 0.2rem;
}

.sustainability-item p {
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.8);
}

/* --------------------------------------------------------------------------
   11. Our Team, EPICT Values & Culture
   -------------------------------------------------------------------------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-block: var(--space-xl);
}

.value-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  border-top: 4px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.value-card:hover {
  transform: translateY(-3px);
  border-top-color: var(--color-accent);
}

.value-letter {
  font-family: var(--font-display);
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.value-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xs);
}

.value-card p {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin-bottom: 0;
}

.culture-dual-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

@media (min-width: 860px) {
  .culture-dual-split {
    grid-template-columns: 1fr 1fr;
  }
}

.culture-info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.testimonial-quote {
  border-inline-start: 4px solid var(--color-accent);
  padding-inline-start: var(--space-md);
  margin-block: var(--space-md);
  font-style: italic;
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.testimonial-author {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-muted);
  font-style: normal;
  display: block;
  margin-top: var(--space-xs);
}

/* --------------------------------------------------------------------------
   12. Technical FAQ Section (AEO/GEO Optimized)
   -------------------------------------------------------------------------- */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-width: 880px;
  margin-inline: auto;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem var(--space-lg);
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-text);
  gap: var(--space-md);
}

.faq-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.faq-answer {
  display: none;
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-muted);
  font-size: var(--font-size-base);
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  display: block;
}

/* --------------------------------------------------------------------------
   13. Contact & Regional Offices Section
   -------------------------------------------------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

@media (min-width: 960px) {
  .contact-layout {
    grid-template-columns: 1fr 1.15fr;
  }
}

.office-card-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.office-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.office-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.office-address {
  font-style: normal;
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  margin-bottom: var(--space-md);
}

.office-contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border-subtle);
}

.office-contact-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
}

.office-contact-item svg {
  color: var(--color-primary);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.map-container {
  margin-top: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 9;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* Accessible Inquiry Form (Remediates A11Y-05) */
.inquiry-form-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-md);
}

.inquiry-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 600px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-label .required {
  color: var(--color-accent);
}

.form-control {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 48px;
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 20%, transparent);
  background-color: #ffffff;
}

.form-helper {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
}

.form-alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  display: none;
}

.form-alert.success {
  display: block;
  background-color: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

/* --------------------------------------------------------------------------
   14. Footer (Comprehensive Multi-Column)
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-2xl);
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

@media (min-width: 1024px) {
  .footer-top {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }
}

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

.footer-brand-title {
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
}

.footer-brand-col p {
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.footer-col-title {
  color: #ffffff;
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links-list a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer-social-links {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.footer-social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.footer-social-btn:hover {
  background: var(--color-primary);
  color: #ffffff;
}

.footer-bottom {
  padding-top: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.6);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.footer-credits {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* --------------------------------------------------------------------------
   15. Back-to-Top Button
   -------------------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  border: 2px solid var(--color-surface);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast);
  z-index: 990;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   16. Motion & Scroll Reveal
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .reveal-on-scroll.is-revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Ensure full visibility if JavaScript is disabled or prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* --------------------------------------------------------------------------
   17. Technical Tables & Data Specifications (for GEO/AEO & Projects)
   -------------------------------------------------------------------------- */
.spec-table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-block: var(--space-md);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--font-size-sm);
  background-color: var(--color-surface);
}

.spec-table th,
.spec-table td {
  padding: 0.85rem 1.15rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.spec-table th {
  background-color: var(--color-background);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text);
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table tr:hover td {
  background-color: var(--color-primary-subtle);
}

/* Filter Bar for Projects & Services */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-2xl);
  justify-content: center;
}

.filter-btn {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}