/* ==========================================================================
   HABITABLE DREAMS — ARCHITECTURAL DESIGN & BUILD LONDON
   Design System & Master Stylesheet
   Architecture: Mobile-First, Modern CSS Grid & Flexbox, Fluid Typography
   Variant: B ("Clean premium trade" - Architectural, Refined, Authoritative)
   ========================================================================== */

:root {
  /* Exact Palette from design_brief.json */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-muted: #526173;
  --color-primary: #0d62e0;
  --color-primary-text: #ffffff;
  --color-accent: #c59a3f;
  --color-dark: #0b1329;
  --color-dark-text: #f8fafc;

  /* Derived Tonal Variations (Strictly from the Exact Palette Hues) */
  --color-primary-hover: #094eb5;
  --color-primary-active: #073d8f;
  --color-primary-soft: rgba(13, 98, 224, 0.08);
  --color-primary-border: rgba(13, 98, 224, 0.22);
  --color-accent-hover: #a88130;
  --color-accent-soft: rgba(197, 154, 63, 0.12);
  --color-accent-border: rgba(197, 154, 63, 0.3);
  
  --color-dark-surface: #101a38;
  --color-dark-muted: #94a3b8;
  --color-dark-border: rgba(248, 250, 252, 0.12);

  --color-border: #e2e8f0;
  --color-border-subtle: #f1f5f9;
  --color-surface-hover: #fcfdfe;

  /* Typography: Single Family Manrope */
  --font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Fluid Typographic Scale using 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 + 0.35vw, 1.25rem);
  --font-size-lg: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --font-size-xl: clamp(1.5rem, 1.35rem + 0.75vw, 1.875rem);
  --font-size-2xl: clamp(1.875rem, 1.6rem + 1.25vw, 2.5rem);
  --font-size-3xl: clamp(2.25rem, 1.85rem + 1.85vw, 3.25rem);
  --font-size-hero: clamp(2.5rem, 2rem + 2.5vw, 4rem);

  /* Elevation & Shadows */
  --shadow-sm: 0 1px 3px rgba(11, 19, 41, 0.06), 0 1px 2px rgba(11, 19, 41, 0.04);
  --shadow-md: 0 4px 16px -2px rgba(11, 19, 41, 0.08), 0 2px 6px -2px rgba(11, 19, 41, 0.04);
  --shadow-lg: 0 16px 32px -4px rgba(11, 19, 41, 0.12), 0 4px 12px -2px rgba(11, 19, 41, 0.06);
  --shadow-xl: 0 24px 48px -6px rgba(11, 19, 41, 0.18);

  /* Layout Constrains & Radii */
  --max-width: 1280px;
  --max-width-narrow: 960px;
  --header-height: 76px;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 250ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   CSS Reset & Base Hygiene
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  color-scheme: light;
  overflow-x: clip; /* Cleanly clip without disabling sticky positioning */
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip; /* Never use overflow: hidden or auto on body to preserve position: sticky */
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessible Skip Navigation */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1.5rem;
  background: var(--color-dark);
  color: var(--color-primary-text);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--font-size-sm);
  z-index: 9999;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--color-accent);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1.5rem;
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Media Defaults */
img, svg, picture, video {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family);
  color: var(--color-text);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-hero);
  font-weight: 800;
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

p {
  color: var(--color-muted);
  font-weight: 400;
  max-width: 72ch;
}

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

a:hover {
  color: var(--color-primary-hover);
}

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

ul, ol {
  list-style: none;
}

/* Focus Indicator for Accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Container Structure */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding-inline: 2rem;
  }
}

@media (min-width: 1200px) {
  .container {
    padding-inline: 2.5rem;
  }
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* Section Rhythm */
.section {
  padding-block: clamp(3.5rem, 5vw + 1.5rem, 6.5rem);
  position: relative;
}

.section-dark {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-dark-text);
}

.section-dark p {
  color: var(--color-dark-muted);
}

.section-subtle {
  background-color: var(--color-surface);
  border-block: 1px solid var(--color-border-subtle);
}

/* Section Header Typography */
.section-header {
  margin-bottom: clamp(2.5rem, 3.5vw + 1rem, 4rem);
}

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

.section-header.text-center p {
  margin-inline: auto;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 1.5rem;
  height: 2px;
  background-color: var(--color-accent);
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-muted);
  line-height: 1.55;
}

/* ==========================================================================
   Buttons & Interactive Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.875rem 1.75rem;
  min-height: 48px; /* Ergonomic touch target >= 48px */
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--font-size-sm);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(13, 98, 224, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-primary-text);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(13, 98, 224, 0.35);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: #f1f5f9;
  border-color: var(--color-muted);
  color: var(--color-text);
  transform: translateY(-1px);
}

.btn-whatsapp {
  background-color: #128c7e;
  color: #ffffff;
  border-color: #128c7e;
}

.btn-whatsapp:hover {
  background-color: #0d6e62;
  border-color: #0d6e62;
  color: #ffffff;
  transform: translateY(-1px);
}

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

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

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

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

.btn-sm {
  min-height: 40px;
  padding: 0.5rem 1.125rem;
  font-size: var(--font-size-xs);
}

.btn-lg {
  min-height: 54px;
  padding: 1rem 2.25rem;
  font-size: var(--font-size-base);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

/* ==========================================================================
   Header & Navigation (Pinned Sticky, Never Hidden)
   ========================================================================== */

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-border);
  transition: box-shadow var(--transition-normal);
}

header.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(11, 19, 41, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 1.5rem;
}

/* Brand Logo (Acts as Home Link per requirements) */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 800;
  flex-shrink: 0;
}

.brand-logo-mark {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.brand-logo-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-text);
  line-height: 1.1;
}

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

/* Desktop Navigation */
.desktop-nav {
  display: none;
}

@media (min-width: 992px) {
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
}

.nav-link {
  padding: 0.5rem 0.875rem;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: rgba(13, 98, 224, 0.04);
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.875rem;
  right: 0.875rem;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.header-cta-group {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

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

.header-phone-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-xs);
  transition: color var(--transition-fast);
}

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

/* Mobile Hamburger Toggle */
.mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text);
  padding: 0;
  z-index: 1001;
}

@media (min-width: 992px) {
  .mobile-nav-toggle {
    display: none;
  }
}

.hamburger-box {
  width: 22px;
  height: 16px;
  position: relative;
}

.hamburger-inner,
.hamburger-inner::before,
.hamburger-inner::after {
  width: 22px;
  height: 2px;
  background-color: currentColor;
  position: absolute;
  transition: transform var(--transition-fast), top var(--transition-fast), bottom var(--transition-fast);
}

.hamburger-inner {
  top: 7px;
}

.hamburger-inner::before {
  content: '';
  top: -7px;
}

.hamburger-inner::after {
  content: '';
  bottom: -7px;
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-inner {
  background-color: transparent;
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-inner::before {
  top: 0;
  transform: rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-inner::after {
  bottom: 0;
  transform: rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  z-index: 999;
}

.mobile-drawer.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-drawer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--color-border-subtle);
  min-height: 48px;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: rgba(13, 98, 224, 0.06);
  color: var(--color-primary);
}

.mobile-drawer-footer {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ==========================================================================
   Hero Section (Typographic Layout per Design Brief)
   ========================================================================== */

.hero-section {
  padding-top: clamp(3rem, 6vw + 1rem, 6rem);
  padding-bottom: clamp(3.5rem, 6vw + 1.5rem, 6.5rem);
  background: 
    radial-gradient(circle at 10% 20%, rgba(13, 98, 224, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(197, 154, 63, 0.04) 0%, transparent 45%),
    var(--color-bg);
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-size: 32px 32px;
  background-image: 
    linear-gradient(to right, rgba(15, 23, 42, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.03) 1px, transparent 1px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero-proof-badge {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.625rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-stars {
  color: #f59e0b;
  display: inline-flex;
  align-items: center;
  gap: 0.125rem;
}

.hero-proof-dot {
  color: var(--color-muted);
}

.hero-title {
  margin-bottom: 1.5rem;
  color: var(--color-text);
  letter-spacing: -0.03em;
}

.hero-subheadline {
  font-size: var(--font-size-lg);
  line-height: 1.55;
  color: var(--color-muted);
  margin-bottom: 2rem;
  max-width: 780px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.hero-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.hero-meta-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.hero-meta-icon {
  width: 24px;
  height: 24px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.hero-meta-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.125rem;
}

.hero-meta-desc {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  line-height: 1.4;
}

/* ==========================================================================
   Section 1: Trust Credentials Strip
   ========================================================================== */

.trust-credentials-bar {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding-block: 2.5rem;
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.credential-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

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

.credential-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.credential-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.credential-desc {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  line-height: 1.45;
}

/* ==========================================================================
   Section 2: Core Services Grid
   ========================================================================== */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

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

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

.service-card-header {
  padding: 1.75rem 1.75rem 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
  background: linear-gradient(180deg, rgba(13, 98, 224, 0.03) 0%, transparent 100%);
}

.service-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.service-category-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
}

.service-price-pill {
  font-size: var(--font-size-xs);
  font-weight: 800;
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.service-card-body {
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.service-desc {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

.service-features-list {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.service-feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text);
}

.service-feature-check {
  color: var(--color-primary);
  flex-shrink: 0;
}

.service-card-footer {
  padding: 1.25rem 1.75rem;
  background-color: #fafbfc;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.service-learn-more {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.service-learn-more:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Section 3: Signature Transformation ("Blueprint-to-Build" Interactive Slider)
   ========================================================================== */

.signature-section {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
  overflow: hidden;
  position: relative;
}

.signature-controls-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.signature-view-presets {
  display: inline-flex;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-sm);
  padding: 0.25rem;
  gap: 0.25rem;
}

.view-preset-btn {
  background: transparent;
  border: none;
  color: var(--color-dark-muted);
  padding: 0.5rem 1rem;
  font-size: var(--font-size-xs);
  font-weight: 700;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-preset-btn:hover {
  color: #ffffff;
}

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

/* The Interactive Slider Container */
.blueprint-slider-wrapper {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background-color: #060b17;
  aspect-ratio: 16 / 9;
  min-height: 420px;
  user-select: none;
  -webkit-user-select: none;
}

@media (max-width: 640px) {
  .blueprint-slider-wrapper {
    aspect-ratio: 4 / 3;
    min-height: 380px;
  }
}

/* Base Layer: Architectural Technical CAD Blueprint */
.slider-layer-blueprint {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(rgba(13, 98, 224, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 98, 224, 0.12) 1px, transparent 1px),
    #070e24;
  background-size: 24px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  box-sizing: border-box;
}

.blueprint-header-stamp {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  z-index: 2;
}

.blueprint-badge {
  background-color: rgba(13, 98, 224, 0.25);
  border: 1px solid rgba(13, 98, 224, 0.5);
  color: #60a5fa;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-xs);
  font-family: monospace;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.blueprint-meta-box {
  background-color: rgba(6, 11, 23, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.5rem 0.75rem;
  font-family: monospace;
  font-size: 0.6875rem;
  color: #94a3b8;
  line-height: 1.4;
  text-align: right;
  border-radius: var(--radius-xs);
}

.blueprint-cad-drawing {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Top Layer: Completed Luxury Finished Build (Clipped) */
.slider-layer-finished {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
  background-color: #121826;
  transition: clip-path 50ms linear;
  overflow: hidden;
}

.finished-badge {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  background-color: rgba(197, 154, 63, 0.3);
  border: 1px solid var(--color-accent);
  color: #fcd34d;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-xs);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  z-index: 3;
}

.finished-render-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* The Draggable Divider Handle */
.slider-divider-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background-color: var(--color-accent);
  transform: translateX(-50%);
  z-index: 10;
  pointer-events: none;
  box-shadow: 0 0 12px rgba(197, 154, 63, 0.8);
}

.slider-handle-button {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 48px;
  height: 48px;
  background-color: var(--color-accent);
  color: #0b1329;
  border: 3px solid #ffffff;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  cursor: grab;
  pointer-events: auto;
  z-index: 11;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.slider-handle-button:active {
  cursor: grabbing;
  transform: translate(-50%, -50%) scale(1.08);
}

/* Native Accessible Range Slider Input (Stretched Across) */
.slider-range-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
  z-index: 12;
}

/* Interactive Hotspot Pins */
.hotspot-pin {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #0b1329;
  font-weight: 800;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 4px rgba(197, 154, 63, 0.35);
  cursor: pointer;
  z-index: 15;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hotspot-pin:hover,
.hotspot-pin:focus {
  transform: scale(1.15);
  box-shadow: 0 0 0 8px rgba(197, 154, 63, 0.5);
}

.hotspot-tooltip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(11, 19, 41, 0.95);
  border: 1px solid var(--color-accent);
  color: #ffffff;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  box-shadow: var(--shadow-lg);
  z-index: 20;
}

.hotspot-pin:hover .hotspot-tooltip,
.hotspot-pin:focus .hotspot-tooltip {
  opacity: 1;
  visibility: visible;
}

/* Itemized Milestones & Timeline Disclosures */
.transformation-milestones-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-dark-border);
}

.milestone-item {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.milestone-phase {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.375rem;
}

.milestone-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.milestone-desc {
  font-size: var(--font-size-xs);
  color: var(--color-dark-muted);
  line-height: 1.45;
}

/* ==========================================================================
   Section 4: Featured London Projects
   ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.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-normal), box-shadow var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-image-wrapper {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: #0b1329;
}

.project-image-graphic {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image-graphic {
  transform: scale(1.03);
}

.project-category-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: rgba(11, 19, 41, 0.85);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.project-location-pill {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  background-color: rgba(197, 154, 63, 0.95);
  color: #0b1329;
  font-size: 0.6875rem;
  font-weight: 800;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-xs);
}

.project-card-content {
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: var(--font-size-lg);
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.project-desc {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

.project-spec-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
}

.project-spec-pill {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text);
  background-color: var(--color-bg);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--color-border);
}

/* ==========================================================================
   Section 5: 8-Stage Concept-to-Completion Process
   ========================================================================== */

.process-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  position: relative;
}

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

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

.process-step-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.process-step-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary-border);
}

.process-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 800;
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  border: 1px solid var(--color-primary-border);
}

.process-step-title {
  font-size: var(--font-size-md);
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.process-step-desc {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  line-height: 1.5;
}

.process-billing-guarantee {
  margin-top: 2.5rem;
  background-color: rgba(13, 98, 224, 0.05);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .process-billing-guarantee {
    flex-direction: column;
    text-align: center;
  }
}

.billing-guarantee-icon {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.billing-guarantee-text h4 {
  font-size: var(--font-size-base);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.billing-guarantee-text p {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin: 0;
}

/* ==========================================================================
   Section 6: Investment Guide & Pricing Matrix (Tabular Data for AEO)
   ========================================================================== */

.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

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

.investment-table th {
  background-color: #0b1329;
  color: #f8fafc;
  padding: 1rem 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  white-space: nowrap;
}

.investment-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-muted);
  vertical-align: middle;
}

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

.investment-table tr:hover td {
  background-color: #f8fafc;
}

.investment-service-name {
  font-weight: 700;
  color: var(--color-text);
}

.investment-price-highlight {
  font-weight: 800;
  color: var(--color-primary);
  white-space: nowrap;
}

.investment-compliance-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-xs);
  background-color: rgba(197, 154, 63, 0.12);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
}

/* ==========================================================================
   Section 7: Borough Coverage
   ========================================================================== */

.borough-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.borough-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: all var(--transition-fast);
}

.borough-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.borough-pin-icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
}

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

.borough-note {
  font-size: 0.75rem;
  color: var(--color-muted);
}

/* ==========================================================================
   Section 8: Verified Google Reviews & Testimonials
   ========================================================================== */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.testimonial-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.testimonial-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.testimonial-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.testimonial-stars {
  color: #f59e0b;
  display: flex;
  gap: 0.15rem;
}

.google-source-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-muted);
  background-color: var(--color-bg);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.testimonial-quote {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
}

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

.author-role {
  font-size: 0.75rem;
  color: var(--color-muted);
}

/* ==========================================================================
   Section 9: Frequently Asked Questions (Accordion)
   ========================================================================== */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 860px;
  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-border);
}

.faq-button {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 700;
  font-size: var(--font-size-base);
  color: var(--color-text);
  min-height: 48px;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

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

.faq-content {
  padding: 0 1.5rem 1.25rem;
  display: none;
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.faq-item.is-open .faq-content {
  display: block;
}

/* ==========================================================================
   Section 10: Contact & Consultation
   ========================================================================== */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 992px) {
  .contact-layout {
    grid-template-columns: 1.2fr 1fr;
    gap: 3.5rem;
  }
}

.consultation-form-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw + 1rem, 2.5rem);
  box-shadow: var(--shadow-sm);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.8125rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 48px;
}

.form-textarea {
  min-height: 130px;
  resize: vertical;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(13, 98, 224, 0.15);
}

.form-input[aria-invalid="true"],
.form-textarea[aria-invalid="true"] {
  border-color: #dc2626;
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.2);
}

.form-error-msg {
  font-size: 0.75rem;
  color: #dc2626;
  font-weight: 600;
  display: none;
}

.form-input[aria-invalid="true"] + .form-error-msg,
.form-textarea[aria-invalid="true"] + .form-error-msg {
  display: block;
}

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

.form-feedback-alert.success {
  display: block;
  background-color: #ecfdf5;
  border: 1px solid #10b981;
  color: #065f46;
}

/* Contact Info Sidebar */
.contact-info-card {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-channels-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-channel-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.contact-channel-item:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.contact-channel-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-channel-title {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}

.contact-channel-value {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
}

.contact-channel-sub {
  font-size: 0.75rem;
  color: var(--color-muted);
}

/* Opening Hours Card */
.hours-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.hours-card h4 {
  font-size: var(--font-size-base);
  font-weight: 800;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hours-table {
  width: 100%;
  font-size: var(--font-size-xs);
}

.hours-table td {
  padding-block: 0.35rem;
  color: var(--color-muted);
}

.hours-table td:last-child {
  text-align: right;
  font-weight: 600;
  color: var(--color-text);
}

/* Map Container */
.map-container {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  aspect-ratio: 16 / 9;
  min-height: 280px;
}

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

/* ==========================================================================
   Footer Component
   ========================================================================== */

footer.site-footer {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
  padding-top: clamp(3.5rem, 5vw + 1rem, 5rem);
  padding-bottom: clamp(5rem, 6vw, 6rem); /* Space for mobile bottom bar */
  border-top: 1px solid var(--color-dark-border);
  margin-top: auto;
}

@media (min-width: 769px) {
  footer.site-footer {
    padding-bottom: 3rem;
  }
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

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

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

.footer-brand-col p {
  color: var(--color-dark-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-block: 1rem 1.5rem;
}

.footer-heading {
  font-size: var(--font-size-base);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-dark-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-dark-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: var(--font-size-xs);
  color: var(--color-dark-muted);
}

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

.footer-credits {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

/* ==========================================================================
   Mobile Sticky Bottom Bar (Trades Playbook Directive)
   ========================================================================== */

.mobile-sticky-bar {
  display: none;
}

@media (max-width: 768px) {
  .mobile-sticky-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 998;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 0.625rem 1rem;
    gap: 0.75rem;
    box-shadow: 0 -4px 16px rgba(11, 19, 41, 0.12);
  }

  .mobile-sticky-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 48px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: var(--font-size-sm);
    text-decoration: none;
    line-height: 1.2;
    text-align: center;
  }

  .mobile-sticky-btn.call-btn {
    background-color: var(--color-primary);
    color: #ffffff;
  }

  .mobile-sticky-btn.whatsapp-btn {
    background-color: #128c7e;
    color: #ffffff;
  }
}

/* ==========================================================================
   Back-to-Top Button
   ========================================================================== */

.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-dark);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 997;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-normal);
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 80px; /* Above the mobile sticky bottom bar */
    right: 16px;
  }
}

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

.back-to-top:hover {
  background-color: var(--color-primary);
  transform: translateY(-3px);
}

/* ==========================================================================
   Portfolio Filter Tabs
   ========================================================================== */

.portfolio-filter-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

/* ==========================================================================
   Scroll-Reveal Motion & Accessibility
   ========================================================================== */

@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);
  }
}

/* Print Stylesheet */
@media print {
  header.site-header,
  .mobile-sticky-bar,
  .back-to-top,
  .slider-range-input,
  .view-preset-btn {
    display: none !important;
  }

  body {
    background: #ffffff;
    color: #000000;
  }
}