/* ==========================================================================
   KAIROS INTERIOR STUDIO — Production Stylesheet
   Art Direction: Playbook Variant B ("Clean Premium Trade")
   Typography: Manrope Display & Body
   Palette: Architectural Warm Slate, Natural Alabaster & Brushed Brass
   ========================================================================== */

/* --- Custom Properties & Design Tokens --- */
:root {
  /* Exact Art Direction Palette from design_brief.json */
  --color-bg: #fbfaf7;
  --color-surface: #ffffff;
  --color-text: #171c22;
  --color-muted: #586069;
  --color-primary: #19222c;
  --color-primary-text: #ffffff;
  --color-accent: #b88628;
  --color-dark: #11151a;
  --color-dark-text: #ffffff;

  /* Derived Tonal Variations */
  --color-border: #e8e4dc;
  --color-border-subtle: #f0ece5;
  --color-surface-subtle: #f5f2eb;
  --color-surface-alt: #f0ece3;
  --color-accent-hover: #9e711e;
  --color-accent-subtle: rgba(184, 134, 40, 0.12);
  --color-accent-focus: rgba(184, 134, 40, 0.35);
  --color-primary-hover: #263443;
  --color-dark-surface: #171c22;

  /* Typography */
  --font-display: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* 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 */
  --container-max: 1240px;
  --container-narrow: 900px;
  --header-height: 76px;
  --mobile-bar-height: 64px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(17, 21, 26, 0.06);
  --shadow-md: 0 4px 16px rgba(17, 21, 26, 0.08);
  --shadow-lg: 0 12px 36px rgba(17, 21, 26, 0.11);
  --shadow-card: 0 2px 8px rgba(17, 21, 26, 0.05), 0 1px 2px rgba(17, 21, 26, 0.04);
  --shadow-card-hover: 0 12px 30px rgba(17, 21, 26, 0.12);

  /* Transitions */
  --transition-fast: 0.18s ease-out;
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Reset & Base Standards --- */
*, *::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(--color-text);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Never set overflow hidden on html or body to keep position: sticky working reliably */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
  background-color: var(--color-bg);
  color: var(--color-text);
}

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

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

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

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

ul, ol {
  list-style: none;
}

/* Accessible focus visible rings */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Skip link for keyboard navigators */
.skip-link {
  position: absolute;
  top: -100px;
  inset-inline-start: 1rem;
  z-index: 9999;
  background: var(--color-primary);
  color: var(--color-primary-text);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 1rem;
}

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

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

.container-narrow {
  max-width: var(--container-narrow);
}

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

@media (min-width: 992px) {
  .section {
    padding-block: var(--space-4xl);
  }
}

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

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

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

.section-header.text-center {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 2px;
  background: currentColor;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.18;
  color: var(--color-primary);
  margin-bottom: 0.875rem;
  letter-spacing: -0.02em;
}

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

.section-subtitle {
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  color: var(--color-muted);
  line-height: 1.65;
  max-width: 640px;
}

.section-dark .section-subtitle {
  color: #a4abb3;
}

/* --- Buttons & Action Elements --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.875rem 1.625rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.2;
  border-radius: var(--radius-sm);
  transition: var(--transition-normal);
  text-align: center;
  white-space: nowrap;
  min-height: 48px;
  touch-action: manipulation;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(184, 134, 40, 0.28);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

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

.btn-whatsapp {
  background-color: #128c7e;
  color: #ffffff;
  border: 1px solid #128c7e;
}

.btn-whatsapp:hover {
  background-color: #075e54;
  border-color: #075e54;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(18, 140, 126, 0.28);
}

.btn-sm {
  padding: 0.625rem 1.125rem;
  font-size: 0.875rem;
  min-height: 40px;
}

.btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  fill: currentColor;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  align-items: center;
}

/* --- Sticky Global Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(251, 250, 247, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

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

/* Logo: home link with architectural branding */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1875rem;
  letter-spacing: -0.01em;
  flex-shrink: 0;
  min-height: 48px;
}

.logo-monogram {
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.125rem;
  font-weight: 800;
  border: 1px solid var(--color-accent);
}

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

.logo-title {
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-primary);
}

.logo-tagline {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  line-height: 1;
  margin-top: 2px;
}

/* Header Navigation Desktop */
.nav-desktop {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 992px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

.header-actions {
  display: none;
  align-items: center;
  gap: 0.875rem;
}

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

/* Mobile Hamburger Toggle */
.mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  gap: 5px;
  padding: 0;
}

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

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

.mobile-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  inset-inline-start: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.25rem 5rem;
  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.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0.75rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--color-border-subtle);
}

.mobile-nav-link.active {
  color: var(--color-accent);
  background-color: var(--color-surface-subtle);
}

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

/* --- Hero Component (Split Layout) --- */
.hero-split {
  padding-top: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: clamp(2.5rem, 5vw, 4.5rem);
  background: linear-gradient(180deg, var(--color-bg) 0%, rgba(245, 242, 235, 0.6) 100%);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3.5rem;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Real proof rating badge */
.hero-proof-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.4375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  width: fit-content;
}

.rating-stars {
  color: var(--color-accent);
  font-size: 0.9375rem;
  letter-spacing: 0.05em;
}

.proof-divider {
  display: inline-block;
  width: 1px;
  height: 12px;
  background-color: var(--color-border);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.125rem, 4.2vw, 3.5rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--color-primary);
  letter-spacing: -0.025em;
}

.hero-subtitle {
  font-size: clamp(1.0625rem, 1.35vw, 1.25rem);
  line-height: 1.6;
  color: var(--color-muted);
  max-width: 580px;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.spec-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3125rem 0.625rem;
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.spec-chip svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
}

.hero-media {
  position: relative;
}

.hero-media-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  aspect-ratio: 4 / 3;
}

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

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

.hero-badge-overlay {
  position: absolute;
  bottom: 1.25rem;
  inset-inline-start: 1.25rem;
  background-color: rgba(23, 28, 34, 0.92);
  backdrop-filter: blur(8px);
  color: var(--color-surface);
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.overlay-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 700;
}

.overlay-location {
  font-size: 0.9375rem;
  font-weight: 700;
}

/* --- Section 1: Trust Credentials Bar --- */
.trust-strip {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-xl);
}

.trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 576px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .trust-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.trust-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
}

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

.trust-icon-box svg {
  width: 22px;
  height: 22px;
}

.trust-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.trust-desc {
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* --- Section 2: Services Grid --- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

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

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

.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  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(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
}

.service-num {
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.service-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.service-desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.service-features {
  margin-top: auto;
  border-top: 1px solid var(--color-border-subtle);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.service-feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}

.service-feature-item svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* --- Section 3: Featured Residential Portfolio --- */
.portfolio-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  min-height: 40px;
}

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

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

.portfolio-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

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

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

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

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

.project-media-wrapper {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-surface-subtle);
}

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

.project-card:hover .project-media-wrapper img {
  transform: scale(1.04);
}

.project-style-pill {
  position: absolute;
  top: 0.875rem;
  inset-inline-start: 0.875rem;
  background: rgba(23, 28, 34, 0.88);
  backdrop-filter: blur(4px);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

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

.project-title {
  font-size: 1.1875rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  line-height: 1.25;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-bottom: 1rem;
}

.tag-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
}

.tag-badge.gold {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  border-color: rgba(184, 134, 40, 0.25);
  font-weight: 700;
}

.project-snippet {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.project-action-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: auto;
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.project-action-link:hover {
  color: var(--color-accent);
  gap: 0.625rem;
}

/* --- Section 4: Signature Before & After Transformation Slider --- */
.transformation-section {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
  overflow: hidden;
}

.signature-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 992px) {
  .signature-container {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.comparison-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.12);
  user-select: none;
  -webkit-user-select: none;
  background-color: #000;
}

.comparison-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.comparison-before {
  z-index: 1;
  filter: contrast(0.9) brightness(0.85) saturate(0.8);
}

.comparison-after-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  overflow: hidden;
  z-index: 2;
  transition: width 0.05s ease-out;
}

.comparison-after-wrapper .comparison-img {
  width: 100%;
  max-width: none;
}

/* Divider & Split Handle */
.comparison-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background-color: var(--color-accent);
  z-index: 3;
  transform: translateX(-50%);
  cursor: ew-resize;
  touch-action: pan-y;
}

.handle-grip {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-surface);
  color: var(--color-primary);
  border: 2px solid var(--color-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.handle-grip svg {
  width: 20px;
  height: 20px;
}

.comparison-label {
  position: absolute;
  bottom: 1rem;
  padding: 0.375rem 0.875rem;
  background: rgba(17, 21, 26, 0.85);
  backdrop-filter: blur(4px);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 4;
}

.comparison-label.before-label {
  inset-inline-start: 1rem;
}

.comparison-label.after-label {
  inset-inline-end: 1rem;
  color: var(--color-accent);
}

.signature-info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.signature-designer-card {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.designer-quote {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: #d1d6dc;
  font-style: italic;
}

.designer-author {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* --- Section 5: Estates & Residences We Serve --- */
.estates-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 992px) {
  .estates-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.estates-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-top: 1.5rem;
}

.estate-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: var(--transition-fast);
}

.estate-pill:hover {
  border-color: var(--color-accent);
  background-color: var(--color-surface-subtle);
  transform: translateY(-1px);
}

.estate-pill svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
}

.estates-feature-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.studio-headquarters-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

/* --- Section 6: Renovation Journey (4 Steps) --- */
.journey-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

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

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

.journey-step-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.journey-step-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

.step-number {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 1rem;
}

.step-title {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.step-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* --- Section 7: Client Reviews (Verbatim Google Reviews) --- */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@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-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.review-stars-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.review-stars {
  color: var(--color-accent);
  font-size: 1rem;
  letter-spacing: 0.1em;
}

.review-source-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-muted);
  background-color: var(--color-surface-subtle);
  padding: 0.1875rem 0.5rem;
  border-radius: var(--radius-sm);
}

.review-source-tag svg {
  width: 12px;
  height: 12px;
}

.review-quote {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  white-space: pre-line;
}

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

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.author-details {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-primary);
}

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

/* --- Section 8: Singapore Living Guides (Magazine) --- */
.magazine-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

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

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

.magazine-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
}

.magazine-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-surface-subtle);
}

.magazine-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.magazine-card:hover .magazine-media img {
  transform: scale(1.04);
}

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

.magazine-date {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.magazine-title {
  font-size: 1.1875rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.magazine-snippet {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

/* --- Section 9: Consultation & Location Section --- */
.consultation-wrapper {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.consultation-grid {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 992px) {
  .consultation-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.consultation-form-pane {
  padding: clamp(1.75rem, 4vw, 3rem);
}

.consultation-info-pane {
  background-color: var(--color-surface-subtle);
  border-top: 1px solid var(--color-border);
  padding: clamp(1.75rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 992px) {
  .consultation-info-pane {
    border-top: none;
    border-inline-start: 1px solid var(--color-border);
  }
}

/* Form inputs & structure */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

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

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

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 48px;
}

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

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

.form-note {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.form-success-message {
  display: none;
  background-color: #e8f5e9;
  border: 1px solid #c8e6c9;
  color: #2e7d32;
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-top: 1rem;
}

/* Studio Info Blocks */
.info-block {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
}

.info-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.info-icon-box svg {
  width: 18px;
  height: 18px;
}

.info-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.1875rem;
}

.info-text {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.map-container {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  margin-top: 0.5rem;
}

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

/* --- FAQ Accordion Component --- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 840px;
  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-accent);
}

.faq-trigger {
  width: 100%;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: start;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  background: none;
  border: none;
  min-height: 48px;
}

.faq-trigger svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.faq-content {
  display: none;
  padding: 0 1.5rem 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.65;
  border-top: 1px solid var(--color-border-subtle);
  padding-top: 1rem;
}

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

/* --- Global Multi-Column Footer --- */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-3xl);
  padding-bottom: clamp(5rem, 8vw, 3rem); /* Extra padding for mobile bottom bar */
  margin-top: auto;
}

@media (min-width: 768px) {
  .site-footer {
    padding-bottom: var(--space-2xl);
  }
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: var(--space-2xl);
}

@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 1.2fr;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-dark-text);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1875rem;
}

.footer-bio {
  font-size: 0.875rem;
  color: #a4abb3;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 1.125rem;
}

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

.footer-links a {
  font-size: 0.875rem;
  color: #c1c7cf;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: #c1c7cf;
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.8125rem;
  color: #8c949e;
}

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

.footer-credits {
  font-size: 0.75rem;
  color: #6d7580;
}

/* --- Floating Back To Top Button --- */
.back-to-top {
  position: fixed;
  bottom: 5rem;
  inset-inline-end: 1.25rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: 1px solid var(--color-accent);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: var(--transition-normal);
  z-index: 900;
}

@media (min-width: 768px) {
  .back-to-top {
    bottom: 2rem;
    inset-inline-end: 2rem;
  }
}

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

.back-to-top:hover {
  background-color: var(--color-accent);
  color: #ffffff;
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* --- Sticky Mobile Call/WhatsApp Bar --- */
.mobile-sticky-bar {
  display: flex;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-bar-height);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
  z-index: 950;
  padding: 0.5rem 1rem;
  gap: 0.75rem;
}

@media (min-width: 768px) {
  .mobile-sticky-bar {
    display: none;
  }
}

.mobile-sticky-bar .btn {
  flex: 1;
  min-height: 46px;
  padding: 0.5rem;
  font-size: 0.875rem;
}

/* --- Project Detail Modal --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(17, 21, 26, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background-color: var(--color-surface);
  z-index: 2;
}

.modal-close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  transition: var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-border);
}

.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* --- Motion & Reduced Motion Standards --- */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    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.active {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}