/* ==========================================================================
   VISHAL DECOR IDEAS — MASTER DESIGN SYSTEM & GLOBAL STYLES
   Created & Managed by Hidden Routes (https://hiddenroutes.in/)
   Editorial Aesthetics, Responsive Typography & Spatial Hierarchy
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,500;0,600;0,700;0,800;1,400;1,600&family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Color Palette — Warm Editorial Architectural Tone */
  --bg-primary: #FAF7F2;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-muted: #F3ECE2;
  --bg-dark: #181A1D;
  --bg-dark-surface: #22262C;

  --text-primary: #181A1D;
  --text-secondary: #565D68;
  --text-muted: #7D8592;
  --text-inverse: #FAF7F2;
  --text-inverse-muted: #B8BFC9;

  --accent-terracotta: #C87442;
  --accent-terracotta-dark: #A85A2D;
  --accent-terracotta-light: #F7EDE7;
  --accent-gold: #D4A373;
  --accent-sage: #5F7466;
  --accent-sage-light: #EBF1ED;

  --border-light: #E8E2D7;
  --border-subtle: #F0EBE0;
  --border-dark: #333842;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(24, 26, 29, 0.04);
  --shadow-md: 0 6px 18px rgba(24, 26, 29, 0.06);
  --shadow-lg: 0 16px 36px rgba(24, 26, 29, 0.08);
  --shadow-xl: 0 24px 48px rgba(24, 26, 29, 0.12);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  /* Layout */
  --container-max: 1240px;
  --container-wide: 1320px;
  --container-article: 880px;
  --header-height: 76px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  font-weight: 400;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

a {
  color: var(--accent-terracotta-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-terracotta);
}

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

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
}

/* Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-article);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(250, 247, 242, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
}

.logo-accent {
  color: var(--accent-terracotta);
}

.logo-dot {
  color: var(--accent-gold);
  font-weight: 600;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.search-trigger-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: all var(--transition-fast);
}

.search-trigger-btn:hover {
  border-color: var(--accent-terracotta);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.search-btn-text {
  display: inline-block;
}

.search-trigger-btn kbd {
  background: var(--bg-muted);
  border: 1px solid var(--border-light);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.25rem;
  color: var(--text-primary);
  padding: 0.5rem;
}

/* ==========================================================================
   HOMEPAGE & HERO SECTION
   ========================================================================== */
.homepage {
  background-color: var(--bg-primary);
}

.site-hero-section {
  padding: 5rem 1.5rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(200, 116, 66, 0.06) 0%, rgba(250, 247, 242, 0) 100%);
  border-bottom: 1px solid var(--border-light);
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-terracotta-light);
  color: var(--accent-terracotta-dark);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
}

.hero-search-box {
  max-width: 640px;
  margin: 0 auto 2.25rem auto;
}

.hero-search-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--bg-surface);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 0.85rem 1.4rem;
  box-shadow: var(--shadow-md);
  color: var(--text-muted);
  font-size: 0.98rem;
  text-align: left;
  transition: all var(--transition-fast);
}

.hero-search-btn:hover {
  border-color: var(--accent-terracotta);
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
}

.hero-search-btn i {
  color: var(--accent-terracotta);
  font-size: 1.1rem;
}

.hero-search-btn span:first-of-type {
  flex-grow: 1;
}

.hero-search-btn .search-shortcut {
  background: var(--bg-muted);
  border: 1px solid var(--border-light);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.hero-quick-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.quick-chips-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-right: 0.25rem;
}

.chip-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.chip-link:hover {
  background: var(--accent-terracotta-light);
  border-color: var(--accent-terracotta);
  color: var(--accent-terracotta-dark);
  transform: translateY(-1px);
}

.chip-link i {
  color: var(--accent-terracotta);
  font-size: 0.8rem;
}

/* ==========================================================================
   TOPICAL DIRECTORIES GRID (108 CLUSTERS)
   ========================================================================== */
.topical-directory-section {
  padding: 5rem 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
}

.directory-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3.5rem auto;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-terracotta);
  background: var(--accent-terracotta-light);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.directory-header h2 {
  font-size: 2.4rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.directory-header p {
  font-size: 1.15rem;
  color: var(--text-secondary);
}

.clusters-directory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.cluster-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
  text-decoration: none;
  overflow: hidden;
}

.cluster-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-terracotta);
  box-shadow: var(--shadow-lg);
  background: var(--bg-surface);
}

.cluster-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.cluster-icon-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-terracotta-light);
  color: var(--accent-terracotta-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.cluster-count-badge {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-muted);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.cluster-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.65rem;
  color: var(--text-primary);
}

.cluster-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.cluster-subtopics-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

.cluster-subtopic-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cluster-subtopic-item i {
  color: var(--accent-terracotta);
  font-size: 0.7rem;
}

.cluster-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent-terracotta-dark);
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

.cluster-card-footer i {
  transition: transform var(--transition-fast);
}

.cluster-card:hover .cluster-card-footer i {
  transform: translateX(4px);
}

/* ==========================================================================
   CALCULATOR TOOLS SECTION
   ========================================================================== */
.calculator-tool-section {
  padding: 5rem 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
}

.calculator-intro {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3.5rem auto;
}

.calculator-intro h2 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.calculator-intro p {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.calculator-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}

.calc-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-sage-light);
  color: var(--accent-sage);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  align-self: flex-start;
}

.calculator-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.calculator-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.calc-input-group {
  margin-bottom: 1.25rem;
}

.calc-input-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.calc-input-group input,
.calc-input-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast);
}

.calc-input-group input:focus,
.calc-input-group select:focus {
  border-color: var(--accent-terracotta);
  background: #fff;
}

.calculator-results {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.calc-result-pill {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-muted);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.pill-label {
  font-weight: 500;
  color: var(--text-secondary);
}

.pill-val {
  color: var(--accent-terracotta-dark);
  font-size: 1rem;
  font-weight: 700;
}

/* ==========================================================================
   INSTANT SEARCH MODAL
   ========================================================================== */
.search-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2000;
  background: rgba(24, 26, 29, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 5rem 1rem 2rem;
}

.search-modal-overlay.active {
  display: flex;
}

.search-modal-container {
  width: 100%;
  max-width: 680px;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-light);
  overflow: hidden;
  animation: modalSlideDown 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideDown {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.search-modal-header {
  display: flex;
  align-items: center;
  padding: 1.15rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-primary);
}

.search-modal-icon {
  font-size: 1.2rem;
  color: var(--accent-terracotta);
  margin-right: 1rem;
}

#site-search-input {
  flex: 1;
  border: none;
  background: none;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--text-primary);
  outline: none;
}

.search-close-btn {
  font-size: 1.1rem;
  color: var(--text-muted);
  padding: 0.25rem;
  transition: color var(--transition-fast);
}

.search-close-btn:hover {
  color: var(--text-primary);
}

.search-modal-results {
  max-height: 480px;
  overflow-y: auto;
  padding: 0.75rem;
}

.search-prompt-state, .search-empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.search-prompt-state i, .search-empty-state i {
  color: var(--accent-terracotta);
  font-size: 1.4rem;
  display: block;
  margin-bottom: 0.6rem;
}

.search-results-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.search-result-item {
  display: block;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  text-decoration: none;
  border: 1px solid transparent;
}

.search-result-item:hover {
  background: var(--bg-primary);
  border-color: var(--border-subtle);
}

.search-item-cat {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-terracotta);
  margin-bottom: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.search-hub-badge {
  background: var(--accent-terracotta-light);
  color: var(--accent-terracotta-dark);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
}

.search-item-title {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.search-item-title mark {
  background: var(--accent-terracotta-light);
  color: var(--accent-terracotta-dark);
  font-weight: 800;
  border-radius: 2px;
  padding: 0 0.2rem;
}

.search-item-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   GLOBAL FOOTER
   ========================================================================== */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-inverse-muted);
  border-top: 1px solid var(--border-dark);
}

.footer-top-wrap {
  padding: 4.5rem 0 3.5rem;
}

.site-footer-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 3rem;
}

.brand-col {
  display: flex;
  flex-direction: column;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-inverse);
  display: inline-block;
  margin-bottom: 1rem;
}

.footer-desc {
  color: var(--text-inverse-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.managed-by-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-dark-surface);
  border: 1px solid var(--border-dark);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-inverse);
  align-self: flex-start;
}

.managed-by-badge i {
  color: var(--accent-gold);
}

.managed-by-badge a {
  color: var(--accent-gold);
  font-weight: 700;
  text-decoration: underline;
}

.managed-by-badge a:hover {
  color: #fff;
}

.footer-col h3 {
  color: var(--text-inverse);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-inverse-muted);
  font-size: 0.92rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom-wrap {
  padding: 2rem 0;
  border-top: 1px solid var(--border-dark);
  background: #121316;
}

.footer-bottom-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-inverse-muted);
}

.footer-copyright a {
  color: var(--accent-gold);
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-legal-links a {
  color: var(--text-inverse-muted);
  font-size: 0.85rem;
}

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

/* ==========================================================================
   UTILITY & TRUST PAGES (About, Contact, Privacy, Terms, 404)
   ========================================================================== */
.trust-page {
  background-color: var(--bg-primary);
}

.trust-hero-header {
  padding: 4rem 0 2.5rem;
  background: linear-gradient(180deg, rgba(200, 116, 66, 0.06) 0%, rgba(250, 247, 242, 0) 100%);
  border-bottom: 1px solid var(--border-light);
}

.trust-hero-inner {
  max-width: var(--container-article);
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
}

.trust-hero-inner h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.trust-lead {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.trust-content-container {
  max-width: var(--container-article);
  margin: 3.5rem auto 6rem auto;
  padding: 0 1.5rem;
}

.trust-prose {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.trust-prose h2 {
  font-size: 1.85rem;
  margin: 2.5rem 0 1rem;
  color: var(--text-primary);
}

.trust-prose p {
  margin-bottom: 1.35rem;
}

.trust-prose ul {
  margin: 1rem 0 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.editorial-highlight-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--accent-terracotta);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.75rem;
  margin: 2rem 0;
}

.contact-methods-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.contact-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}

.contact-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.contact-link {
  font-weight: 700;
  color: var(--accent-terracotta);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.error-404-page {
  background-color: var(--bg-primary);
}

.error-container {
  text-align: center;
  padding: 6rem 1.5rem;
  max-width: 680px;
  margin: 0 auto;
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 1024px) {
  .clusters-directory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .calculator-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100vw;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-light);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-lg);
  }
  .main-nav.mobile-open {
    display: block;
  }
  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .search-btn-text, .search-trigger-btn kbd {
    display: none;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .hero-subtitle {
    font-size: 1.05rem;
  }
  .clusters-directory-grid {
    grid-template-columns: 1fr;
  }
  .contact-methods-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom-inner {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}