/* ==========================================================================
   TileNest — Architectural Monograph & Surface Atelier Design System
   Complete Visual Redesign (HTML5 + CSS3 + Bootstrap 5.3)
   Palette:
     Primary Background: #F5F3EE
     Secondary Background: #FFFFFF
     Primary Text: #262824
     Secondary Text: #77766F
     Accent Color: #A66F50
     Dark Sections: #262824
     Borders: #E3E0D8
   Typography:
     Headings: 'Manrope', sans-serif
     Body: 'Inter', sans-serif
   ========================================================================== */

:root {
  --tn-bg-primary: #F5F3EE;
  --tn-bg-secondary: #FFFFFF;
  --tn-bg-subtle: #ECE9E1;
  --tn-text-primary: #262824;
  --tn-text-secondary: #77766F;
  --tn-accent: #A66F50;
  --tn-accent-hover: #8D5B3F;
  --tn-dark: #262824;
  --tn-dark-elevated: #31332E;
  --tn-border: #E3E0D8;
  --tn-border-dark: rgba(245, 243, 238, 0.14);
  --tn-white: #FFFFFF;
  --tn-ease: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --tn-container-max: 1340px;

  /* Compatibility aliases so existing utility classes map to the new tokens */
  --tn-ivory: #F5F3EE;
  --tn-ivory-alt: #ECE9E1;
  --tn-charcoal: #262824;
  --tn-terracotta: #A66F50;
  --tn-text: #262824;
  --tn-text-muted: #77766F;
}

/* Base Reset & Architectural Typography */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--tn-bg-primary);
  color: var(--tn-text-primary);
  font-size: 1rem;
  line-height: 1.68;
  font-weight: 400;
  overflow-x: hidden;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--tn-container-max);
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6,
.tn-heading {
  font-family: 'Manrope', sans-serif;
  color: var(--tn-text-primary);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-top: 0;
  text-wrap: balance;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--tn-ease), border-color var(--tn-ease), background-color var(--tn-ease), opacity var(--tn-ease);
}

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

:focus-visible {
  outline: 2px solid var(--tn-accent);
  outline-offset: 3px;
}

/* Editorial Type Scale */
.tn-display-xl {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(2.5rem, 4.8vw, 4.5rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.05;
  text-wrap: balance;
}

.tn-display-title {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(2.2rem, 4vw, 3.65rem);
  font-weight: 500;
  letter-spacing: -0.032em;
  line-height: 1.08;
  text-wrap: balance;
}

.tn-section-title {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(1.75rem, 2.8vw, 2.75rem);
  font-weight: 500;
  letter-spacing: -0.028em;
  line-height: 1.14;
  text-wrap: balance;
}

.tn-editorial-lead {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 400;
  line-height: 1.42;
  letter-spacing: -0.015em;
  color: var(--tn-text-primary);
}

.tn-kicker {
  font-family: 'Manrope', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--tn-accent);
  display: inline-block;
  margin-bottom: 0.85rem;
}

.tn-kicker-light {
  color: #D8C9B8;
}

/* Zero-Pill Unboxed Metadata Line */
.tn-meta-line {
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  color: var(--tn-text-secondary);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.01em;
}

.tn-meta-sep {
  color: var(--tn-accent);
  font-weight: 600;
}

/* Color & Surface Utilities */
.bg-ivory { background-color: var(--tn-bg-primary) !important; }
.bg-ivory-alt { background-color: var(--tn-bg-subtle) !important; }
.bg-white { background-color: var(--tn-bg-secondary) !important; }
.bg-charcoal { background-color: var(--tn-dark) !important; color: var(--tn-bg-primary); }
.bg-terracotta { background-color: var(--tn-accent) !important; color: var(--tn-white); }

.text-charcoal { color: var(--tn-text-primary) !important; }
.text-terracotta { color: var(--tn-accent) !important; }
.text-muted-tn { color: var(--tn-text-secondary) !important; }
.text-stone-beige { color: #D8C9B8 !important; }

.border-tn { border-color: var(--tn-border) !important; }
.border-tn-dark { border-color: var(--tn-border-dark) !important; }

/* Architectural Spacing & Hairline Grid System */
.section-padding {
  padding-top: 6.5rem;
  padding-bottom: 6.5rem;
}

.section-padding-sm {
  padding-top: 4.25rem;
  padding-bottom: 4.25rem;
}

@media (max-width: 991.98px) {
  .section-padding {
    padding-top: 4.25rem;
    padding-bottom: 4.25rem;
  }
  .section-padding-sm {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }
}

.tn-hairline-top { border-top: 1px solid var(--tn-border); }
.tn-hairline-bottom { border-bottom: 1px solid var(--tn-border); }

/* Editorial Index Grid (Replaces Repetitive Rounded Box Cards) */
.tn-architectural-grid {
  border-top: 1px solid var(--tn-border);
  border-left: 1px solid var(--tn-border);
}

.tn-architectural-cell {
  border-right: 1px solid var(--tn-border);
  border-bottom: 1px solid var(--tn-border);
  padding: 2.5rem;
  background-color: var(--tn-bg-primary);
  transition: background-color var(--tn-ease);
}

.tn-architectural-cell:hover {
  background-color: var(--tn-bg-secondary);
}

@media (max-width: 767.98px) {
  .tn-architectural-cell {
    padding: 1.75rem;
  }
}

/* Interactive Ledger Rows (For Services & Specifications) */
.tn-ledger-list {
  border-top: 1px solid var(--tn-border);
}

.tn-ledger-row {
  display: block;
  border-bottom: 1px solid var(--tn-border);
  padding: 2.25rem 0;
  transition: background-color var(--tn-ease), padding var(--tn-ease);
}

.tn-ledger-row:hover {
  background-color: var(--tn-bg-secondary);
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.tn-ledger-dark .tn-ledger-row {
  border-bottom-color: var(--tn-border-dark);
}

.tn-ledger-dark .tn-ledger-row:hover {
  background-color: var(--tn-dark-elevated);
}

/* ==========================================================================
   Buttons & Interactive Links (Sharp Architectural Geometry, 0px–2px Radius)
   ========================================================================== */
.btn-tn-primary {
  background-color: var(--tn-accent);
  color: var(--tn-white);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.85rem;
  border-radius: 0;
  border: 1px solid var(--tn-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--tn-ease), border-color var(--tn-ease), transform var(--tn-ease);
}

.btn-tn-primary:hover,
.btn-tn-primary:focus {
  background-color: var(--tn-accent-hover);
  border-color: var(--tn-accent-hover);
  color: var(--tn-white);
  transform: translateY(-1px);
}

.btn-tn-dark {
  background-color: var(--tn-dark);
  color: var(--tn-white);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.85rem;
  border-radius: 0;
  border: 1px solid var(--tn-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--tn-ease), border-color var(--tn-ease), transform var(--tn-ease);
}

.btn-tn-dark:hover,
.btn-tn-dark:focus {
  background-color: var(--tn-accent);
  border-color: var(--tn-accent);
  color: var(--tn-white);
  transform: translateY(-1px);
}

.btn-tn-outline {
  background-color: transparent;
  color: var(--tn-text-primary);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.85rem;
  border-radius: 0;
  border: 1px solid var(--tn-text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--tn-ease), color var(--tn-ease), border-color var(--tn-ease);
}

.btn-tn-outline:hover,
.btn-tn-outline:focus {
  background-color: var(--tn-text-primary);
  color: var(--tn-white);
}

.btn-tn-outline-light {
  background-color: transparent;
  color: var(--tn-bg-primary);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.85rem;
  border-radius: 0;
  border: 1px solid rgba(245, 243, 238, 0.45);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--tn-ease), color var(--tn-ease), border-color var(--tn-ease);
}

.btn-tn-outline-light:hover,
.btn-tn-outline-light:focus {
  background-color: var(--tn-bg-primary);
  color: var(--tn-dark);
  border-color: var(--tn-bg-primary);
}

.btn-tn-sm {
  padding: 0.55rem 1.15rem;
  font-size: 0.8125rem;
}

.tn-link-editorial {
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--tn-text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--tn-text-primary);
  white-space: nowrap;
  transition: color var(--tn-ease), border-color var(--tn-ease);
}

.tn-link-editorial:hover {
  color: var(--tn-accent);
  border-bottom-color: var(--tn-accent);
}

.tn-link-editorial-light {
  color: var(--tn-bg-primary);
  border-bottom-color: rgba(245, 243, 238, 0.5);
}

.tn-link-editorial-light:hover {
  color: #D8C9B8;
  border-bottom-color: #D8C9B8;
}

/* ==========================================================================
   Common Header & Navigation (Compact Architectural Top Bar)
   ========================================================================== */
.tn-site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background-color: rgba(245, 243, 238, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--tn-border);
  transition: background-color var(--tn-ease), border-color var(--tn-ease);
}

.tn-site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  border-bottom-color: #D5D1C7;
}

.tn-navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 74px;
}

.tn-brand-wordmark {
  font-family: 'Manrope', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: var(--tn-text-primary);
  white-space: nowrap;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.tn-brand-mark-tile {
  width: 18px;
  height: 18px;
  background-color: var(--tn-accent);
  display: inline-block;
  position: relative;
}

.tn-brand-mark-tile::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  right: -4px;
  bottom: -4px;
  border: 1px solid var(--tn-text-primary);
}

.tn-nav-list {
  display: flex;
  align-items: center;
  gap: 2.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tn-nav-item {
  position: relative;
}

.tn-nav-link {
  font-family: 'Manrope', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--tn-text-primary);
  white-space: nowrap;
  padding: 1.6rem 0;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  position: relative;
}

.tn-nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--tn-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--tn-ease);
}

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

.tn-nav-link:hover::after,
.tn-nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Desktop Dropdown Menu */
.tn-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 245px;
  background-color: var(--tn-bg-secondary);
  border: 1px solid var(--tn-border);
  padding: 0.6rem 0;
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--tn-ease), transform var(--tn-ease), visibility var(--tn-ease);
  z-index: 1050;
  box-shadow: 0 20px 40px -15px rgba(38, 40, 36, 0.12);
}

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

.tn-dropdown-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 1.35rem;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--tn-text-primary);
  white-space: nowrap;
  transition: background-color var(--tn-ease), color var(--tn-ease), padding-left var(--tn-ease);
}

.tn-dropdown-link:hover,
.tn-dropdown-link.active {
  background-color: var(--tn-bg-primary);
  color: var(--tn-accent);
  padding-left: 1.6rem;
}

/* Header Actions */
.tn-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.tn-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 0;
  border: 1px solid var(--tn-border);
  background-color: transparent;
  color: var(--tn-text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  position: relative;
  cursor: pointer;
  transition: background-color var(--tn-ease), border-color var(--tn-ease), color var(--tn-ease);
}

.tn-icon-btn:hover {
  background-color: var(--tn-text-primary);
  border-color: var(--tn-text-primary);
  color: var(--tn-white);
}

.tn-cart-count {
  position: absolute;
  top: -5px;
  right: -5px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background-color: var(--tn-accent);
  color: var(--tn-white);
  font-size: 0.68rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}

/* Mobile Menu */
.tn-mobile-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tn-mobile-nav-item {
  border-bottom: 1px solid var(--tn-border);
}

.tn-mobile-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tn-mobile-nav-link {
  display: block;
  padding: 0.95rem 0;
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  color: var(--tn-text-primary);
  flex-grow: 1;
}

.tn-mobile-submenu-toggle {
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  color: var(--tn-text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tn-mobile-submenu {
  list-style: none;
  padding: 0 0 0.85rem 1rem;
  margin: 0;
  display: none;
}

.tn-mobile-submenu.show {
  display: block;
}

.tn-mobile-submenu a {
  display: block;
  padding: 0.45rem 0;
  font-size: 0.88rem;
  color: var(--tn-text-secondary);
}

.tn-mobile-submenu a:hover {
  color: var(--tn-accent);
}

/* ==========================================================================
   Redesigned Architectural Hero Sections (Non-Template Editorial Layouts)
   ========================================================================== */

/* Homepage 01 Hero: Editorial Masthead Above + Panoramic Architectural Stage Below */
.tn-editorial-hero {
  padding-top: 3.5rem;
  padding-bottom: 4.5rem;
  border-bottom: 1px solid var(--tn-border);
}

.tn-hero-panoramic-stage {
  position: relative;
  margin-top: 3rem;
  border: 1px solid var(--tn-border);
  background-color: var(--tn-dark);
  overflow: hidden;
}

.tn-hero-panoramic-img {
  width: 100%;
  height: clamp(380px, 56vw, 680px);
  object-fit: cover;
  display: block;
}

.tn-hero-architectural-plate {
  background-color: var(--tn-bg-secondary);
  border-top: 1px solid var(--tn-border);
  padding: 1.5rem 2rem;
}

@media (min-width: 992px) {
  .tn-hero-architectural-plate {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    max-width: 440px;
    border: 1px solid var(--tn-border);
    padding: 1.75rem 2rem;
  }
}

/* Homepage 02 Hero: Fullscreen Architectural Gallery Scrim */
.tn-hero-v2 {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: flex-end;
  background-color: var(--tn-dark);
  color: var(--tn-bg-primary);
  overflow: hidden;
  border-bottom: 1px solid var(--tn-border);
}

.tn-hero-v2-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.tn-hero-v2-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(38, 40, 36, 0.35) 0%, rgba(38, 40, 36, 0.88) 75%, rgba(38, 40, 36, 0.96) 100%);
  z-index: 2;
}

.tn-hero-v2-content {
  position: relative;
  z-index: 3;
  padding: 6rem 0 4.5rem;
  width: 100%;
}

/* Redesigned Editorial Subpage Header (Clean Architectural Split — No Muddy Banners) */
.tn-page-banner {
  position: relative;
  background-color: var(--tn-bg-secondary);
  color: var(--tn-text-primary);
  padding: 4.25rem 0 3.75rem;
  border-bottom: 1px solid var(--tn-border);
  overflow: hidden;
}

.tn-page-banner-bg,
.tn-page-banner-scrim {
  display: none;
}

.tn-page-banner-inner {
  position: relative;
  z-index: 2;
}

.tn-page-banner h1,
.tn-page-banner .tn-display-title {
  color: var(--tn-text-primary) !important;
}

.tn-page-banner p.lead {
  color: var(--tn-text-secondary) !important;
  font-size: 1.08rem;
}

.tn-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--tn-text-secondary);
  margin-bottom: 1rem;
  list-style: none;
  padding: 0;
}

.tn-breadcrumb a {
  color: var(--tn-text-secondary);
}

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

/* ==========================================================================
   Gallery Plates & Product Specimens (Replaces Rounded Boxy Cards)
   ========================================================================== */
.tn-surface-card {
  background-color: var(--tn-bg-secondary);
  border: 1px solid var(--tn-border);
  border-radius: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: border-color var(--tn-ease), transform var(--tn-ease);
}

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

/* Unboxed Gallery Specimen (Used in Editorial Collections) */
.tn-specimen-item {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tn-card-img-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--tn-bg-subtle);
  border-radius: 0 !important;
}

.tn-card-img-wrap.aspect-square {
  aspect-ratio: 1 / 1;
}

.tn-card-img-wrap.aspect-portrait {
  aspect-ratio: 3 / 4;
}

.tn-card-img-wrap.aspect-wide {
  aspect-ratio: 16 / 10;
}

.tn-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 550ms cubic-bezier(0.16, 1, 0.3, 1);
}

.tn-surface-card:hover .tn-card-img-wrap img,
.tn-specimen-item:hover .tn-card-img-wrap img {
  transform: scale(1.035);
}

.tn-card-body {
  padding: 1.65rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

/* Editorial Numbering & Metrics */
.tn-step-number {
  font-family: 'Manrope', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--tn-accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tn-kpi-strip {
  background-color: var(--tn-bg-secondary);
  border-top: 1px solid var(--tn-border);
  border-bottom: 1px solid var(--tn-border);
}

.tn-kpi-value {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(1.9rem, 3.2vw, 2.75rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--tn-text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.08;
}

/* Segmented Filter Controls */
.tn-filter-bar {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0.25rem;
  background-color: var(--tn-bg-primary);
  border: 1px solid var(--tn-border);
}

.tn-filter-btn {
  border: none;
  background: transparent;
  color: var(--tn-text-secondary);
  font-family: 'Manrope', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: 0;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--tn-ease), color var(--tn-ease);
}

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

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

/* Swatch Buttons */
.tn-swatch-dot {
  width: 18px;
  height: 18px;
  display: inline-block;
  border: 1px solid rgba(38, 40, 36, 0.25);
}

/* Custom Accordion (Sharp Architectural Lines) */
.tn-accordion .accordion-item {
  background-color: var(--tn-bg-secondary);
  border: none;
  border-bottom: 1px solid var(--tn-border);
  border-radius: 0 !important;
  margin-bottom: 0;
}

.tn-accordion .accordion-item:first-child {
  border-top: 1px solid var(--tn-border);
}

.tn-accordion .accordion-button {
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--tn-text-primary);
  background-color: transparent;
  padding: 1.5rem 0.5rem;
  box-shadow: none !important;
  border-radius: 0 !important;
}

.tn-accordion .accordion-button:not(.collapsed) {
  color: var(--tn-accent);
  background-color: transparent;
}

.tn-accordion .accordion-body {
  padding: 0 0.5rem 1.65rem;
  color: var(--tn-text-secondary);
  max-width: 72ch;
}

/* Forms */
.tn-form-control {
  background-color: var(--tn-bg-secondary);
  border: 1px solid var(--tn-border);
  border-radius: 0;
  padding: 0.8rem 1rem;
  font-size: 0.9375rem;
  color: var(--tn-text-primary);
  width: 100%;
  transition: border-color var(--tn-ease);
}

.tn-form-control:focus {
  border-color: var(--tn-accent);
  outline: none;
}

.tn-form-label {
  font-family: 'Manrope', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tn-text-primary);
  margin-bottom: 0.45rem;
  display: block;
}

/* ==========================================================================
   Common Footer (Dark Architectural Monograph Footer)
   ========================================================================== */
.tn-site-footer {
  background-color: var(--tn-dark);
  color: rgba(245, 243, 238, 0.78);
  padding-top: 5.5rem;
  border-top: 1px solid var(--tn-border-dark);
}

.tn-footer-heading {
  font-family: 'Manrope', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--tn-white);
  margin-bottom: 1.35rem;
}

.tn-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tn-footer-links li {
  margin-bottom: 0.65rem;
}

.tn-footer-links a {
  color: rgba(245, 243, 238, 0.72);
  font-size: 0.9rem;
  transition: color var(--tn-ease);
}

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

.tn-social-link {
  width: 38px;
  height: 38px;
  border: 1px solid var(--tn-border-dark);
  color: var(--tn-bg-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--tn-ease), border-color var(--tn-ease), color var(--tn-ease);
}

.tn-social-link:hover {
  background-color: var(--tn-accent);
  border-color: var(--tn-accent);
  color: var(--tn-white);
}

.tn-footer-bottom {
  border-top: 1px solid var(--tn-border-dark);
  padding: 1.85rem 0;
  margin-top: 4.5rem;
  font-size: 0.825rem;
  color: rgba(245, 243, 238, 0.58);
}

/* Back to Top & Toast */
.tn-back-to-top {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  width: 44px;
  height: 44px;
  background-color: var(--tn-dark);
  color: var(--tn-white);
  border: 1px solid var(--tn-border-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--tn-ease), transform var(--tn-ease), visibility var(--tn-ease), background-color var(--tn-ease);
  z-index: 1020;
}

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

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

.tn-toast-container {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  z-index: 1090;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tn-toast {
  background-color: var(--tn-dark);
  color: var(--tn-bg-primary);
  border-left: 3px solid var(--tn-accent);
  padding: 0.9rem 1.25rem;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.22);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  animation: tnSlideUp 180ms ease-out;
}

@keyframes tnSlideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { 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;
  }
}