/* ==========================================================================
   Tan Seng Renovation Construction Pte. Ltd.
   Clean Premium Trade System (Variant B - Trades & Local Services)
   Palettes and typography strictly derived from design_brief.json & design_playbook.md
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & Root Variables
   -------------------------------------------------------------------------- */
:root {
  /* Exact Palette from design_brief.json */
  --background: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --primary: #d8161e;
  --primary-hover: #b91017;
  --primary-subtle: #fef2f2;
  --primaryText: #ffffff;
  --accent: #1e3a8a;
  --accent-hover: #172554;
  --accent-subtle: #eff6ff;
  --dark: #0b0f17;
  --dark-surface: #131b2e;
  --dark-card: #1e293b;
  --darkText: #f8fafc;
  --dark-muted: #94a3b8;
  
  /* Structural Borders & Shadows */
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-dark: #334155;
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 2px 4px 0 rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 12px -2px rgba(15, 23, 42, 0.08), 0 3px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 14px 24px -4px rgba(15, 23, 42, 0.1), 0 6px 10px -4px rgba(15, 23, 42, 0.06);
  --shadow-xl: 0 24px 38px -6px rgba(15, 23, 42, 0.14), 0 10px 14px -6px rgba(15, 23, 42, 0.08);

  /* Typography: Manrope from design_brief.json */
  --font-display: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Fluid Typography Scale (CSS clamp) */
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.06rem + 0.4vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.15rem + 0.6vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.35rem + 0.9vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.65rem + 1.3vw, 2.375rem);
  --text-4xl: clamp(2.25rem, 1.95rem + 1.8vw, 3rem);
  --text-5xl: clamp(2.75rem, 2.35rem + 2.4vw, 3.75rem);

  /* 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;

  /* Border Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-full: 9999px;

  /* Layout */
  --container-max: 1240px;
  --header-height: 76px;
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.26s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip; /* Fixes horizontal overflows without breaking sticky header */
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
  text-wrap: balance;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  color: var(--muted);
  font-size: var(--text-base);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

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

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

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

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

ul, ol {
  list-style: none;
}

/* Accessible Skip Navigation Link */
.skip-link {
  position: absolute;
  top: -100px;
  inset-inline-start: var(--space-4);
  background: var(--accent);
  color: #ffffff;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 700;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* Standardized Keyboard Focus States (WCAG AA/AAA) */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   3. Utility Classes & Layout Containers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

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

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

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-20);
  }
}

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

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

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

.section-header {
  margin-bottom: var(--space-12);
}

.section-header.text-center {
  text-align: center;
  max-width: 760px;
  margin-inline: auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
  background: var(--primary-subtle);
  color: var(--primary);
}

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

.section-dark .section-badge {
  background: rgba(216, 22, 30, 0.15);
  color: #ff6b72;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--muted);
  margin-top: var(--space-3);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

/* --------------------------------------------------------------------------
   4. Buttons & CTAs
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px; /* Ergonomic touch target >= 48px */
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1;
  border-radius: var(--radius-md);
  text-align: center;
  white-space: nowrap;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primaryText);
  box-shadow: 0 2px 6px rgba(216, 22, 30, 0.25);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(216, 22, 30, 0.35);
}

.btn-secondary {
  background-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(30, 58, 138, 0.25);
}

.btn-secondary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.35);
}

.btn-whatsapp {
  background-color: #047857;
  color: #ffffff;
}

.btn-whatsapp:hover {
  background-color: #065f46;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.btn-outline:hover {
  background-color: var(--surface);
  border-color: var(--text);
}

.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

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

.btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

/* --------------------------------------------------------------------------
   5. Site Header & Sticky Navigation
   -------------------------------------------------------------------------- */
.top-notice-bar {
  background-color: var(--dark);
  color: var(--dark-muted);
  font-size: var(--text-xs);
  padding-block: var(--space-2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-notice-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.top-notice-badges {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-weight: 600;
}

.top-notice-contact {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.top-notice-contact a {
  color: var(--darkText);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.top-notice-contact a:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* Direct child of body, strictly sticky */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: box-shadow var(--transition-fast);
}

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

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

.site-logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  min-height: 48px;
  flex-shrink: 0;
}

.site-logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

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

.site-brand-name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.15;
}

.site-brand-tagline {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

@media (min-width: 992px) {
  .main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
  }

  .nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
  }

  .nav-link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text);
    padding: var(--space-2) 0;
    position: relative;
    transition: color var(--transition-fast);
  }

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

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

  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    inset-inline-start: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
    border-radius: var(--radius-full);
  }
}

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

.header-phone-link {
  display: none;
}

@media (min-width: 640px) {
  .header-phone-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
  }
  
  .header-phone-link:hover {
    color: var(--primary);
    background-color: var(--background);
  }
}

/* Hamburger Toggle Button */
.menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

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

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 23, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

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

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  inset-inline-end: 0;
  bottom: 0;
  width: min(85vw, 360px);
  background-color: var(--surface);
  z-index: 1060;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  overflow-y: auto;
}

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

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border);
}

.mobile-nav-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  color: var(--text);
}

.mobile-nav-links {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text);
  border-radius: var(--radius-md);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: var(--background);
  color: var(--primary);
}

.mobile-nav-footer {
  margin-top: auto;
  padding: var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* --------------------------------------------------------------------------
   6. Hero Section (Split Layout from design_brief.json)
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding-block: var(--space-12) var(--space-16);
  overflow: hidden;
}

@media (min-width: 1024px) {
  .hero-section {
    padding-block: var(--space-16) var(--space-20);
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-12);
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background-color: var(--primary-subtle);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.hero-headline {
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: var(--space-4);
}

@media (min-width: 1200px) {
  .hero-headline {
    font-size: var(--text-5xl);
  }
}

.hero-subheadline {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--muted);
  margin-bottom: var(--space-6);
  max-width: 620px;
}

.hero-proof-bar {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-2) var(--space-4);
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-8);
}

.hero-proof-bar .rating-stars {
  color: #eab308;
  letter-spacing: 1px;
}

.hero-proof-divider {
  color: var(--border-strong);
}

.hero-media-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  background-color: var(--border);
  aspect-ratio: 4 / 3;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-media-wrapper:hover .hero-img {
  transform: scale(1.02);
}

.hero-floating-pill {
  position: absolute;
  bottom: var(--space-4);
  inset-inline-start: var(--space-4);
  background: rgba(11, 15, 23, 0.88);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: calc(100% - var(--space-8));
}

.hero-floating-pill-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hero-floating-pill-text {
  font-size: var(--text-xs);
  line-height: 1.35;
}

.hero-floating-pill-text strong {
  display: block;
  font-size: var(--text-sm);
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   7. Statutory Credentials Strip & Scale Counters
   -------------------------------------------------------------------------- */
.trust-strip {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding-block: var(--space-8);
}

.trust-badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
  align-items: center;
}

.trust-badge-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.trust-badge-img {
  width: 64px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.trust-badge-info h3,
.trust-badge-info h4 {
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
}

.trust-badge-info p {
  font-size: var(--text-xs);
  color: var(--muted);
  margin-top: 2px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  padding: var(--space-6) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-xs);
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.stat-sublabel {
  font-size: var(--text-xs);
  color: var(--muted);
  margin-top: var(--space-1);
}

/* --------------------------------------------------------------------------
   8. Signature Section: Draggable Before/After Transformation Slider
   -------------------------------------------------------------------------- */
.signature-section {
  background-color: var(--background);
  border-bottom: 1px solid var(--border);
}

.comparison-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

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

.comparison-slider-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  max-height: 600px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
  background-color: var(--dark);
}

.comparison-image-layer {
  position: absolute;
  top: 0;
  inset-inline-start: 0;
  width: 100%;
  height: 100%;
}

.comparison-image-layer img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.comparison-image-before {
  z-index: 1;
}

.comparison-image-after {
  z-index: 2;
  width: 50%; /* Initial split position */
  overflow: hidden;
  border-inline-end: 2px solid #ffffff;
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
}

.comparison-image-after img {
  width: 100%;
  max-width: none;
  /* Keep image full width of container even when clipped */
}

.comparison-label {
  position: absolute;
  top: var(--space-4);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  pointer-events: none;
  z-index: 3;
}

.label-before {
  inset-inline-end: var(--space-4);
  background: rgba(11, 15, 23, 0.85);
  color: #ffffff;
}

.label-after {
  inset-inline-start: var(--space-4);
  background: var(--primary);
  color: #ffffff;
}

/* Draggable Divider Handle */
.comparison-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  inset-inline-start: 50%;
  width: 44px;
  margin-inline-start: -22px;
  z-index: 10;
  cursor: ew-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
}

.comparison-handle-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: #ffffff;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

.comparison-handle-button {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: #ffffff;
  color: var(--text);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.comparison-specs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-6);
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

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

.spec-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.spec-text strong {
  display: block;
  font-size: var(--text-sm);
  color: var(--text);
}

.spec-text span {
  font-size: var(--text-xs);
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   9. Core Services Grid (4 Operational Divisions)
   -------------------------------------------------------------------------- */
.services-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(4, 1fr);
  }
}

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

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

.service-card-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--border);
}

.service-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-card:hover .service-card-img {
  transform: scale(1.05);
}

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

.service-card-tag {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--space-2);
}

.service-card-title {
  font-size: var(--text-lg);
  font-weight: 800;
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.service-card-desc {
  font-size: var(--text-sm);
  color: var(--muted);
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.service-card-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.service-card-list li {
  font-size: var(--text-xs);
  color: var(--text);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.service-card-list li svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   10. In-House Factory Spotlight (Synergy@KB)
   -------------------------------------------------------------------------- */
.factory-spotlight {
  background-color: var(--surface);
  border-block: 1px solid var(--border);
}

.factory-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 992px) {
  .factory-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.factory-media-stack {
  position: relative;
}

.factory-primary-img-wrapper {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  aspect-ratio: 4 / 3;
}

.factory-badge-callout {
  margin-top: var(--space-4);
  background: var(--accent-subtle);
  border: 1px solid rgba(30, 58, 138, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.factory-badge-callout strong {
  display: block;
  font-size: var(--text-sm);
  color: var(--accent);
}

.factory-badge-callout span {
  font-size: var(--text-xs);
  color: var(--muted);
}

.factory-points {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-block: var(--space-6);
}

@media (min-width: 640px) {
  .factory-points {
    grid-template-columns: 1fr 1fr;
  }
}

.factory-point-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--background);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.factory-point-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.factory-point-text h3,
.factory-point-text h4 {
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 2px;
}

.factory-point-text p {
  font-size: var(--text-xs);
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   11. Project Portfolio & Interactive Filter
   -------------------------------------------------------------------------- */
.filter-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--radius-full);
  background-color: var(--surface);
  color: var(--muted);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

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

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

.portfolio-grid {
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

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

.portfolio-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.portfolio-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.portfolio-item-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--border);
}

.portfolio-item-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.portfolio-item:hover .portfolio-item-img {
  transform: scale(1.06);
}

.portfolio-item-badge {
  position: absolute;
  top: var(--space-3);
  inset-inline-start: var(--space-3);
  background: rgba(11, 15, 23, 0.85);
  backdrop-filter: blur(4px);
  color: #ffffff;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
}

.portfolio-item-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.portfolio-item-title {
  font-size: var(--text-base);
  font-weight: 800;
  margin-bottom: var(--space-2);
}

.portfolio-item-desc {
  font-size: var(--text-xs);
  color: var(--muted);
  margin-bottom: var(--space-3);
  flex-grow: 1;
}

.portfolio-item-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   12. 7-Stage Execution Workflow
   -------------------------------------------------------------------------- */
.process-stepper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  position: relative;
}

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

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

.step-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.step-badge-number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--dark);
  color: #ffffff;
  font-weight: 800;
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.step-card:nth-child(even) .step-badge-number {
  background: var(--primary);
}

.step-card h3 {
  font-size: var(--text-base);
  font-weight: 800;
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.step-card p {
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   13. Service Areas (Singapore Coverage)
   -------------------------------------------------------------------------- */
.service-areas-grid {
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

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

@media (min-width: 1024px) {
  .service-areas-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.area-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  box-shadow: var(--shadow-xs);
}

.area-card-region {
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--space-2);
}

.area-card-estates {
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   14. Client Testimonials (Verified Google Reviews)
   -------------------------------------------------------------------------- */
.reviews-grid {
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

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

.review-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #eab308;
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
  letter-spacing: 2px;
}

.review-quote {
  font-size: var(--text-sm);
  color: var(--text);
  line-height: 1.65;
  margin-bottom: var(--space-6);
  font-style: italic;
  flex-grow: 1;
}

.review-author-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.review-avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.review-author-info strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text);
}

.review-author-info span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   15. Direct Estimate & Floor Plan Consultation Form
   -------------------------------------------------------------------------- */
.quote-section {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.quote-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: flex-start;
}

@media (min-width: 992px) {
  .quote-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-12);
  }
}

.quote-perks {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-block: var(--space-6);
}

.quote-perk-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.quote-perk-icon {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.quote-perk-text strong {
  display: block;
  font-size: var(--text-sm);
  color: var(--text);
}

.quote-perk-text p {
  font-size: var(--text-xs);
  color: var(--muted);
}

.form-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

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

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.15);
  outline: none;
}

.form-textarea {
  min-height: 110px;
  resize: vertical;
}

.form-checkbox-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.form-checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   16. Workshop Contact & Map Embed
   -------------------------------------------------------------------------- */
.workshop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 992px) {
  .workshop-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.workshop-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.workshop-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.workshop-info-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.workshop-info-text strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 2px;
}

.workshop-info-text p,
.workshop-info-text a {
  font-size: var(--text-sm);
  color: var(--muted);
}

.workshop-info-text a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.map-container {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  aspect-ratio: 16 / 11;
  background-color: var(--border);
}

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

/* --------------------------------------------------------------------------
   17. Comprehensive Multi-Column Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--dark);
  color: var(--dark-muted);
  padding-top: var(--space-16);
  border-top: 1px solid var(--border-dark);
}

.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-brand .footer-logo-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.footer-brand-title {
  font-size: var(--text-base);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
}

.footer-desc {
  font-size: var(--text-xs);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.footer-accreditations {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-accreditations img {
  height: 36px;
  width: auto;
  filter: brightness(0.9) contrast(1.1);
}

.footer-col-title {
  font-size: var(--text-sm);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links-list a {
  font-size: var(--text-xs);
  color: var(--dark-muted);
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: #ffffff;
  padding-inline-start: 4px;
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-dark);
  padding-block: var(--space-6);
  font-size: var(--text-xs);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.footer-credits {
  font-size: 0.6875rem;
  color: #64748b;
}

.footer-credits a {
  color: #94a3b8;
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   18. Mobile Sticky Bottom Action Bar & Back to Top Button
   -------------------------------------------------------------------------- */
.mobile-sticky-bar {
  display: none;
}

@media (max-width: 768px) {
  .mobile-sticky-bar {
    position: fixed;
    bottom: 0;
    inset-inline: 0;
    z-index: 990;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
  }

  .mobile-sticky-bar .btn {
    min-height: 48px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }

  body {
    padding-bottom: 64px; /* Offset for sticky bar */
  }
}

.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  inset-inline-end: var(--space-6);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--dark);
  color: #ffffff;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 950;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 74px; /* Clear the mobile sticky bar */
    inset-inline-end: var(--space-4);
  }
}

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

.back-to-top:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   19. Motion & Accessibility Safeguards
   -------------------------------------------------------------------------- */
@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);
  }
}

@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;
  }
}