/* ==========================================================================
   CSS Variables & Reset
   ========================================================================== */
:root {
  --primary-blue: #0A3D6B;
  --secondary-blue: #1A5F9E;
  --accent-orange: #FF6B35;
  --accent-orange-hover: #E85B28;
  --text-dark: #2D3748;
  --text-light: #718096;
  --bg-light: #F7FAFC;
  --bg-white: #FFFFFF;
  --border-color: #E2E8F0;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  --border-radius: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-family: var(--font-main);
  color: var(--text-dark);
  line-height: 1.6;
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-light);
  overflow-x: hidden;
}

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

a {
  color: var(--secondary-blue);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-blue);
}

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  color: var(--primary-blue);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.text-center { text-align: center; }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.py-lg { padding: var(--spacing-lg) 0; }
.py-xl { padding: var(--spacing-xl) 0; }
.bg-white { background-color: var(--bg-white); }
.bg-blue { background-color: var(--primary-blue); color: white; }
.bg-blue h2, .bg-blue p { color: white; }

.btn {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--accent-orange);
  color: white !important;
  font-weight: 600;
  border-radius: var(--border-radius);
  text-align: center;
  transition: background-color 0.3s ease, transform 0.2s ease;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:hover {
  background-color: var(--accent-orange-hover);
  transform: translateY(-2px);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
}

.logo span {
  color: var(--secondary-blue);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary-blue);
  position: relative;
}

.hamburger::before, .hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--primary-blue);
  left: 0;
  transition: 0.3s;
}

.hamburger::before { top: -6px; }
.hamburger::after { bottom: -6px; }

.main-nav ul {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.main-nav a {
  color: var(--text-dark);
  font-weight: 600;
  padding: 10px 0;
}

.main-nav a:hover, .main-nav a[aria-current="page"] {
  color: var(--secondary-blue);
}

/* Dropdown */
.has-dropdown {
  position: relative;
}

.dropdown-toggle {
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-white);
  min-width: 250px;
  box-shadow: var(--shadow-md);
  border-radius: var(--border-radius);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-xs) 0;
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu,
.dropdown-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  padding: 10px var(--spacing-sm);
  display: block;
  font-weight: 500;
}

.dropdown-menu a:hover {
  background: var(--bg-light);
  color: var(--primary-blue);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-phone {
  font-weight: 700;
  color: var(--primary-blue);
  font-size: 1.1rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  background: linear-gradient(rgba(10, 61, 107, 0.85), rgba(10, 61, 107, 0.85)), url('/images/manchester-leak-detection-hero.jpg') center/cover;
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.hero h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero p {
  color: #E2E8F0;
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-md) auto;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   Content Layouts
   ========================================================================== */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

@media(min-width: 768px) {
  .content-grid.two-col {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.service-card {
  background: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.service-card h3 {
  margin-bottom: var(--spacing-xs);
}

.service-card p {
  flex-grow: 1;
}

.service-card a {
  margin-top: var(--spacing-sm);
  font-weight: 600;
  display: inline-block;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

@media(min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

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

/* Call Box */
.call-box {
  background: var(--bg-white);
  border-left: 4px solid var(--accent-orange);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-sm);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

.call-box h3 { margin-bottom: 0; }

/* Warning Signs List */
.warning-list {
  list-style: none;
}

.warning-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 15px;
}

.warning-list li::before {
  content: "âš ";
  position: absolute;
  left: 0;
  color: var(--accent-orange);
  font-weight: bold;
}

/* FAQ */
.faq-item {
  margin-bottom: var(--spacing-md);
  background: var(--bg-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.faq-item h3 {
  font-size: 1.2rem;
  color: var(--secondary-blue);
  margin-bottom: 8px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--primary-blue);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

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

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

.footer-col h4 {
  color: white;
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #CBD5E0;
}

.footer-col a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #A0AEC0;
  font-size: 0.9rem;
}

.footer-bottom a {
  color: #A0AEC0;
  text-decoration: underline;
}

/* Breadcrumbs */
.breadcrumbs {
  padding: var(--spacing-sm) 0;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}
.breadcrumbs a {
  color: var(--secondary-blue);
}
.breadcrumbs span {
  color: var(--text-light);
}

/* ==========================================================================
   Mobile Sticky Call Bar
   ========================================================================== */
.mobile-call-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--accent-orange);
  padding: 15px;
  text-align: center;
  z-index: 999;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.2);
}

.mobile-call-bar a {
  color: white;
  font-weight: 700;
  font-size: 1.2rem;
  display: block;
}

@media(max-width: 767px) {
  .mobile-call-bar {
    display: block;
  }
  body {
    padding-bottom: 60px;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .main-nav {
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--bg-white);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    z-index: 999;
  }
  
  .main-nav.active {
    transform: translateY(0);
  }
  
  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .dropdown-menu {
    position: static;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    padding-left: var(--spacing-sm);
  }
  
  .dropdown-menu.active {
    display: block;
  }
  
  .header-cta {
    display: none;
  }
}