/* ═══════════════════════════════════════════════════════════
   NEXAFLOW BLOG PLATFORM — MAIN STYLESHEET
   Step 2: CSS
   Design: Editorial/Refined — Inspired by Ahrefs & Backlinko
   ═══════════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties ─── */
:root {
  /* Brand Colors */
  --color-navy:       #0A2540;
  --color-navy-mid:   #0D3060;
  --color-navy-light: #1B4F8A;
  --color-accent:     #00D4FF;
  --color-accent-2:   #0066FF;
  --color-accent-warm:#FF6B35;
  --color-green:      #00C896;
  --color-white:      #FFFFFF;

  /* Neutral Scale */
  --color-gray-50:    #F8FAFC;
  --color-gray-100:   #F1F5F9;
  --color-gray-200:   #E2E8F0;
  --color-gray-300:   #CBD5E1;
  --color-gray-400:   #94A3B8;
  --color-gray-500:   #64748B;
  --color-gray-600:   #475569;
  --color-gray-700:   #334155;
  --color-gray-800:   #1E293B;
  --color-gray-900:   #0F172A;

  /* Semantic Colors */
  --color-text-primary:   #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted:     #94A3B8;
  --color-text-inverse:   #FFFFFF;
  --color-bg-primary:     #FFFFFF;
  --color-bg-secondary:   #F8FAFC;
  --color-bg-dark:        #0A2540;
  --color-border:         #E2E8F0;
  --color-border-strong:  #CBD5E1;

  /* Typography */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Font Sizes (Fluid) */
  --text-xs:   clamp(0.65rem, 0.6rem + 0.25vw, 0.75rem);
  --text-sm:   clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --text-md:   clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg:   clamp(1.1rem, 1rem + 0.5vw, 1.25rem);
  --text-xl:   clamp(1.2rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl:  clamp(1.4rem, 1.2rem + 1vw, 1.875rem);
  --text-3xl:  clamp(1.75rem, 1.5rem + 1.25vw, 2.25rem);
  --text-4xl:  clamp(2rem, 1.75rem + 1.5vw, 3rem);
  --text-5xl:  clamp(2.5rem, 2rem + 2.5vw, 4rem);
  --text-hero: clamp(2.75rem, 2rem + 4vw, 5rem);

  /* Spacing */
  --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;
  --space-32: 8rem;

  /* Layout */
  --container-max:   1280px;
  --container-blog:  1100px;
  --container-narrow: 860px;
  --header-height:    72px;
  --sidebar-width:    260px;
  --toc-width:        240px;

  /* Borders & Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg:  0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-xl:  0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   200ms ease;
  --transition-slow:   350ms ease;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-indices */
  --z-below:   -1;
  --z-base:    0;
  --z-above:   10;
  --z-sticky:  100;
  --z-header:  200;
  --z-overlay: 300;
  --z-modal:   400;
  --z-toast:   500;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent-2);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-navy); }
a:focus-visible {
  outline: 2px solid var(--color-accent-2);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

ul, ol { list-style: none; }

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  color: var(--color-text-primary);
  font-weight: 700;
}

/* ─── Skip Link (Accessibility) ─── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: var(--z-modal);
  padding: var(--space-3) var(--space-6);
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 1rem;
  color: var(--color-white);
}

/* ─── Container ─── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
@media (max-width: 768px) {
  .container { padding: 0 var(--space-4); }
}

/* ════════════════════════════════════════════
   ANNOUNCEMENT BAR
   ════════════════════════════════════════════ */
.announcement-bar {
  background: var(--color-navy);
  color: var(--color-gray-200);
  font-size: var(--text-sm);
  text-align: center;
  padding: var(--space-2) 0;
  position: relative;
  z-index: var(--z-header);
}
.announcement-bar p {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.announcement-icon { font-style: normal; }
.announcement-link {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.announcement-link:hover { color: var(--color-white); }

/* ════════════════════════════════════════════
   HEADER
   ════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}
.site-header.header-scrolled {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-navy);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  flex-shrink: 0;
  text-decoration: none;
}
.site-logo:hover { color: var(--color-accent-2); }
.logo-text { line-height: 1; }

/* Primary Nav */
.primary-nav { flex: 1; }
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  justify-content: center;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}
.nav-link:hover,
.nav-link--active {
  color: var(--color-navy);
  background: var(--color-gray-100);
}
.nav-arrow { font-size: 0.6em; opacity: 0.6; }

/* Dropdown */
.nav-item.has-dropdown { position: relative; }
.nav-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  min-width: 480px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-5);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  pointer-events: none;
}
.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: all;
}
.dropdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
.dropdown-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}
.dropdown-link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-gray-700);
  font-size: var(--text-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}
.dropdown-link:hover {
  background: var(--color-gray-50);
  color: var(--color-navy);
}
.dropdown-icon { font-size: 1.25em; margin-top: 1px; flex-shrink: 0; }
.dropdown-link strong { display: block; font-weight: 600; margin-bottom: 1px; }
.dropdown-link small { color: var(--color-gray-500); font-size: var(--text-xs); }

/* Header CTA */
.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Mobile Toggle */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.mobile-nav-toggle:hover { background: var(--color-gray-100); }
.hamburger-line {
  display: block;
  height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
  width: 100%;
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: translateX(-8px);
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ════════════════════════════════════════════
   BUTTONS
   ════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  line-height: 1;
}

.btn--primary {
  background: var(--color-navy);
  color: var(--color-white);
  border-color: var(--color-navy);
}
.btn--primary:hover {
  background: var(--color-navy-mid);
  border-color: var(--color-navy-mid);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(10,37,64,0.3);
}

.btn--outline {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-border-strong);
}
.btn--outline:hover {
  background: var(--color-gray-50);
  border-color: var(--color-navy);
  color: var(--color-navy);
}

.btn--ghost {
  background: transparent;
  color: var(--color-gray-600);
  border-color: transparent;
}
.btn--ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-navy);
}

.btn--whatsapp {
  background: #25D366;
  color: var(--color-white);
  border-color: #25D366;
}
.btn--whatsapp:hover {
  background: #1ebe5d;
  border-color: #1ebe5d;
  color: var(--color-white);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-md);
  border-radius: var(--radius-lg);
}

.btn--full { width: 100%; }

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* ════════════════════════════════════════════
   HERO SECTION
   ════════════════════════════════════════════ */


/* Grid background pattern */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-content { max-width: 560px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 0 2px rgba(0,200,150,0.2);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 2px rgba(0,200,150,0.2); }
  50% { box-shadow: 0 0 0 6px rgba(0,200,150,0.1); }
}
.hero-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}
.hero-highlight {
  font-style: italic;
  color: var(--color-accent-2);
}

.hero-section {
  position: relative;
  padding: 36px 0 40px;
  background: var(--color-gray-50);
  overflow: hidden;
}

.hero-subheading {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-8);
  max-width: 500px;
}

.hero-cta-group {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.stat-item {
  text-align: center;
}
.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1;
}
.stat-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
  white-space: nowrap;
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--color-border-strong);
  flex-shrink: 0;
}

/* Hero Visual / Mock Cards */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-card-stack {
  position: relative;
  width: 340px;
  height: 360px;
}
.mock-card {
  position: absolute;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-xl);
}
.mock-card--gbp {
  top: 0;
  left: 0;
  right: 0;
  z-index: 3;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}
.mock-card-header {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}
.mock-map-pin { font-size: 1.5em; }
.mock-business-name {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-navy);
  margin-bottom: var(--space-1);
}
.mock-rating { display: flex; align-items: center; gap: var(--space-1); }
.mock-stars { color: #FBBC04; font-size: var(--text-sm); }
.mock-review-count { font-size: var(--text-xs); color: var(--color-gray-500); }
.mock-rank-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--color-navy);
  color: var(--color-white);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.mock-rank-badge span {
  font-weight: 800;
  font-size: var(--text-lg);
  line-height: 1;
  font-family: var(--font-display);
}
.mock-rank-badge small { font-size: 9px; opacity: 0.7; }

.mock-card--stats {
  bottom: 60px;
  right: -20px;
  z-index: 2;
  width: 220px;
}
.mock-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-gray-100);
  font-size: var(--text-xs);
}
.mock-stat-row:last-child { border-bottom: none; }
.mock-stat-label { color: var(--color-gray-500); }
.mock-stat-value { font-weight: 700; font-size: var(--text-sm); }
.trend-up { color: var(--color-green); }

.mock-card--review {
  bottom: 0;
  left: -10px;
  z-index: 1;
  max-width: 220px;
}
.mock-review-stars { color: #FBBC04; font-size: var(--text-sm); margin-bottom: var(--space-2); }
.mock-review-text {
  font-size: var(--text-xs);
  color: var(--color-gray-700);
  font-style: italic;
  margin-bottom: var(--space-2);
  line-height: 1.5;
}
.mock-reviewer { font-size: var(--text-xs); color: var(--color-gray-500); }

/* ════════════════════════════════════════════
   SECTION HEADERS (Shared)
   ════════════════════════════════════════════ */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}
.section-header--left {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}
.section-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-2);
  margin-bottom: var(--space-3);
}
.section-heading {
  font-size: var(--text-3xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  color: var(--color-gray-900);
}
.section-subheading {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.section-header-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent-2);
  margin-top: var(--space-3);
}
.section-header-link:hover { gap: var(--space-2); }

/* ════════════════════════════════════════════
   SERVICES SECTION
   ════════════════════════════════════════════ */
.services-section {
  padding: var(--space-24) 0;
  background: var(--color-white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.service-card {
  position: relative;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-white);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-accent-2);
}
.service-card--featured {
  border-color: var(--color-navy);
  background: var(--color-gray-50);
}

.service-card-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--color-accent-2);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.service-card-icon {
  width: 52px;
  height: 52px;
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-navy);
  margin-bottom: var(--space-5);
  transition: background var(--transition-fast);
}
.service-card:hover .service-card-icon {
  background: var(--color-navy);
  color: var(--color-white);
}

.service-card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  color: var(--color-gray-900);
}
.service-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}
.service-card-features {
  list-style: none;
  margin-bottom: var(--space-6);
}
.service-card-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  padding: var(--space-1) 0;
}
.service-card-features li::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-green);
  flex-shrink: 0;
}
.service-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent-2);
  transition: gap var(--transition-fast);
}
.service-card-link:hover { gap: var(--space-2); }

/* ════════════════════════════════════════════
   CONTENT CLUSTERS SECTION
   ════════════════════════════════════════════ */
.clusters-section {
  padding: var(--space-24) 0;
  background: var(--color-gray-50);
}

/* Cluster Tabs */
.cluster-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0;
}
.cluster-tab {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-500);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}
.cluster-tab:hover {
  color: var(--color-navy);
  background: var(--color-gray-100);
}
.cluster-tab--active {
  color: var(--color-navy);
  border-bottom-color: var(--color-navy);
  background: transparent;
}

/* Cluster Panel */
.cluster-panel { display: none; }
.cluster-panel--active { display: block; }

.cluster-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-10);
  align-items: start;
}

.cluster-pillar {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent-2);
  border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
  padding: var(--space-8);
}
.cluster-pillar-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-2);
  margin-bottom: var(--space-3);
}
.cluster-pillar-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}
.cluster-pillar-title a {
  color: var(--color-gray-900);
  text-decoration: none;
}
.cluster-pillar-title a:hover { color: var(--color-accent-2); }
.cluster-pillar-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}
.cluster-pillar-meta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.meta-item {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.cluster-children { padding: var(--space-4) 0; }
.cluster-children-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-4);
}
.cluster-article-list { display: flex; flex-direction: column; gap: var(--space-2); }
.cluster-article-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.cluster-article-link:hover {
  border-color: var(--color-accent-2);
  color: var(--color-accent-2);
  transform: translateX(4px);
  background: rgba(0,102,255,0.02);
}

/* ════════════════════════════════════════════
   ARTICLES SECTION
   ════════════════════════════════════════════ */
.articles-section {
  padding: var(--space-24) 0;
  background: var(--color-white);
}

.articles-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-6);
}

/* Article Card */
.article-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}
.article-card--featured {
  grid-row: 1 / 3;
}

.article-card-img-link { display: block; overflow: hidden; }
.article-card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-gray-200);
}
.article-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.article-card:hover .article-card-img img { transform: scale(1.04); }
.article-card-img--sm { aspect-ratio: 16 / 9; }

.article-card-category {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: var(--color-navy);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 700;
  border-radius: var(--radius-full);
}

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

.article-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-bottom: var(--space-3);
}
.meta-sep { opacity: 0.5; }

.article-card-title {
  font-size: var(--text-xl);
  line-height: 1.3;
  margin-bottom: var(--space-3);
  flex: 1;
}
.article-card--featured .article-card-title {
  font-size: var(--text-2xl);
}
.article-card-title a {
  color: var(--color-gray-900);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.article-card-title a:hover { color: var(--color-accent-2); }

.article-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  flex: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-100);
}
.article-card-author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  font-weight: 500;
}
.author-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-gray-200);
}

.article-read-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent-2);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--transition-fast);
}
.article-read-link:hover { gap: var(--space-2); }

/* ════════════════════════════════════════════
   CITY SECTION
   ════════════════════════════════════════════ */
.city-section {
  padding: var(--space-20) 0;
  background: var(--color-gray-50);
}

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

.city-card {
  display: block;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  text-decoration: none;
  transition: all var(--transition-base);
}
.city-card:hover {
  border-color: var(--color-accent-2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}
.city-card-content { padding: var(--space-8); }
.city-card-icon { font-size: 2.5em; margin-bottom: var(--space-4); }
.city-card-name {
  font-size: var(--text-2xl);
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
}
.city-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}
.city-card-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}
.city-card-links li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}
.city-card-links li::before {
  content: '→';
  color: var(--color-accent-2);
  font-size: 0.85em;
}
.city-card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent-2);
}

/* ════════════════════════════════════════════
   AUDIT CTA SECTION
   ════════════════════════════════════════════ */
.audit-cta-section {
  padding: var(--space-24) 0;
  background: var(--color-white);
}

.audit-cta-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
  background: var(--color-navy);
  border-radius: var(--radius-xl);
  padding: var(--space-12);
  position: relative;
  overflow: hidden;
}
.audit-cta-card::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(0,212,255,0.05);
}

.audit-cta-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.audit-cta-heading {
  font-size: var(--text-3xl);
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: var(--space-4);
}
.audit-cta-desc {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-md);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}
.audit-cta-checklist {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.audit-cta-checklist li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.85);
}
.check-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-green);
  color: var(--color-white);
  font-size: 0.7em;
  font-weight: 700;
  flex-shrink: 0;
}

/* Lead Form */
.audit-cta-form-wrap {
  position: relative;
  z-index: 1;
}
.lead-form {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-xl);
}
.form-heading {
  font-size: var(--text-xl);
  margin-bottom: var(--space-1);
}
.form-subheading {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-6);
}
.form-group {
  margin-bottom: var(--space-4);
}
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}
.form-label span { color: #E53E3E; }
.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-input:focus {
  outline: none;
  border-color: var(--color-accent-2);
  box-shadow: 0 0 0 3px rgba(0,102,255,0.1);
}
.form-input.has-error { border-color: #E53E3E; }
.form-select { cursor: pointer; }
.form-error {
  display: block;
  font-size: var(--text-xs);
  color: #E53E3E;
  margin-top: var(--space-1);
  min-height: 1em;
}

.form-submit { margin-top: var(--space-4); }
.btn-loading { display: none; }

.form-privacy {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-top: var(--space-3);
  justify-content: center;
}

.form-success {
  text-align: center;
  padding: var(--space-6);
}
.success-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-green);
  color: var(--color-white);
  font-size: 1.5em;
  margin: 0 auto var(--space-4);
}

/* ════════════════════════════════════════════
   TESTIMONIALS SECTION
   ════════════════════════════════════════════ */
.testimonials-section {
  padding: var(--space-24) 0;
  background: var(--color-gray-50);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.testimonial-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.testimonial-rating { color: #FBBC04; font-size: var(--text-lg); margin-bottom: var(--space-4); }
.testimonial-text {
  font-size: var(--text-md);
  color: var(--color-gray-700);
  line-height: 1.7;
  font-style: italic;
  margin-bottom: var(--space-6);
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  font-style: normal;
}
.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-gray-200);
  flex-shrink: 0;
}
.testimonial-name {
  display: block;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-gray-900);
  font-style: normal;
}
.testimonial-business {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}
.testimonial-result {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-gray-50);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
}
.result-number {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-accent-2);
}
.result-label { font-size: var(--text-xs); color: var(--color-gray-500); }

/* ════════════════════════════════════════════
   FAQ SECTION
   ════════════════════════════════════════════ */
.faq-section {
  padding: var(--space-24) 0;
  background: var(--color-white);
}
.faq-container { max-width: var(--container-narrow); }

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}
.faq-item:hover { border-color: var(--color-border-strong); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  text-align: left;
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--color-gray-800);
  background: var(--color-white);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.faq-question:hover { background: var(--color-gray-50); }
.faq-question[aria-expanded="true"] {
  color: var(--color-accent-2);
  background: var(--color-gray-50);
}

.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border-strong);
  font-size: var(--text-lg);
  font-weight: 300;
  flex-shrink: 0;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
  line-height: 1;
}
.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
  background: var(--color-accent-2);
  color: var(--color-white);
  border-color: var(--color-accent-2);
}

.faq-answer {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  background: var(--color-gray-50);
}
.faq-answer p + p { margin-top: var(--space-3); }

/* ════════════════════════════════════════════
   SITE FOOTER
   ════════════════════════════════════════════ */
.site-footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-top {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: var(--space-8);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  text-decoration: none;
}
.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}
.footer-contact {
  font-style: normal;
  margin-bottom: var(--space-5);
}
.footer-contact-link {
  font-size: var(--text-sm);
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}
.footer-contact-link:hover { color: var(--color-accent); }

.footer-social {
  display: flex;
  gap: var(--space-3);
}
.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  color: var(--color-gray-400);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.footer-social-link:hover {
  background: rgba(255,255,255,0.15);
  color: var(--color-white);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}
.footer-nav-heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-4);
}
.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-nav-list a {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-fast);
  line-height: 1.5;
}
.footer-nav-list a:hover { color: var(--color-white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.footer-copyright {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}
.footer-location {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}
.footer-location a {
  color: var(--color-gray-400);
  text-decoration: none;
}
.footer-location a:hover { color: var(--color-white); }

/* ════════════════════════════════════════════
   WHATSAPP STICKY BUTTON
   ════════════════════════════════════════════ */
.whatsapp-btn {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  transition: transform var(--transition-spring), box-shadow var(--transition-base);
  text-decoration: none;
  overflow: visible;
}
.whatsapp-btn:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 8px 30px rgba(37,211,102,0.5);
  color: var(--color-white);
}
.whatsapp-icon { flex-shrink: 0; }
.whatsapp-tooltip {
  position: absolute;
  right: calc(100% + 12px);
  white-space: nowrap;
  background: var(--color-gray-900);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  opacity: 0;
  transform: translateX(8px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  pointer-events: none;
}
.whatsapp-btn:hover .whatsapp-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* ════════════════════════════════════════════
   BACK TO TOP BUTTON
   ════════════════════════════════════════════ */
.back-to-top {
  position: fixed;
  bottom: calc(var(--space-6) + 64px);
  right: var(--space-6);
  z-index: var(--z-sticky);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-gray-600);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
}
.back-to-top:hover {
  background: var(--color-navy);
  color: var(--color-white);
  border-color: var(--color-navy);
  transform: translateY(-2px);
}

/* ════════════════════════════════════════════
   RESPONSIVE: TABLET
   ════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero-content { max-width: 100%; }
  .hero-visual { display: none; }
  .articles-grid { grid-template-columns: 1fr; }
  .article-card--featured { grid-row: auto; }
  .footer-nav { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
  .cluster-layout { grid-template-columns: 1fr; }
  .audit-cta-card { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
}

/* ════════════════════════════════════════════
   RESPONSIVE: MOBILE
   ════════════════════════════════════════════ */
@media (max-width: 768px) {
  :root { --header-height: 60px; }

  /* Mobile Nav */
  .primary-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    z-index: var(--z-overlay);
    padding: var(--space-6);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
  }
  .primary-nav.nav-open { transform: translateX(0); }
  .nav-list { flex-direction: column; gap: 0; justify-content: flex-start; }
  .nav-link { padding: var(--space-4) var(--space-2); font-size: var(--text-md); }
  .nav-dropdown { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; border: none; padding: 0 0 0 var(--space-6); min-width: 0; margin-top: var(--space-2); display: none; }
  .nav-item.dropdown-open .nav-dropdown { display: block; }
  .dropdown-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .mobile-nav-toggle { display: flex; }

  .header-cta .btn--outline { display: none; }

  .services-grid { grid-template-columns: 1fr; }
  .city-grid { grid-template-columns: 1fr; }
  .hero-cta-group { flex-direction: column; }
  .hero-stats { gap: var(--space-6); }
  .cluster-tabs { flex-wrap: nowrap; overflow-x: auto; padding-bottom: var(--space-1); }
  .cluster-tab { white-space: nowrap; }
  .articles-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .audit-cta-card { padding: var(--space-8); }
  .lead-form { padding: var(--space-6); }
}

/* ════════════════════════════════════════════
   PRINT STYLES
   ════════════════════════════════════════════ */
@media print {
  .announcement-bar,
  .site-header,
  .whatsapp-btn,
  .back-to-top,
  .header-cta,
  .nav-dropdown { display: none !important; }

  body { font-size: 12pt; color: #000; }
  a { color: #000; text-decoration: underline; }
  .container { max-width: 100%; }
}

/* ════════════════════════════════════════════
   REDUCED MOTION
   ════════════════════════════════════════════ */
@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;
  }
}