/* 
   NJ Leak Detection - Design System
   Water-blue/white palette with bright accent for CTA. 
   Mobile-first, fluid typography, and accessible.
*/

:root {
  /* Colors */
  --color-primary: #0f4c81; /* Deep water blue */
  --color-primary-light: #306b9e;
  --color-primary-dark: #0a365c;
  --color-accent: #e65100; /* Bright, urgent accent for call buttons */
  --color-accent-hover: #bf360c;
  --color-bg-light: #f4f8fb;
  --color-bg-white: #ffffff;
  --color-text-main: #2d3748;
  --color-text-muted: #4a5568;
  --color-border: #e2e8f0;
  
  /* Typography */
  --font-family-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base: 16px;
  --line-height-body: 1.6;
  --line-height-heading: 1.2;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  
  /* Shadows & Borders */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Layout */
  --container-width: 1200px;
  --header-height: 80px;
}

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

html {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  color: var(--color-text-main);
  line-height: var(--line-height-body);
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg-white);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover, a:focus {
  color: var(--color-primary-dark);
}

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--color-primary-dark);
  line-height: var(--line-height-heading);
  margin-bottom: var(--space-sm);
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.25rem); margin-top: var(--space-md); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); margin-top: var(--space-sm); }
p { margin-bottom: var(--space-sm); }
ul, ol { margin-bottom: var(--space-sm); padding-left: var(--space-md); }
li { margin-bottom: var(--space-xs); }

/* Layout & Containers */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

.section {
  padding: var(--space-lg) 0;
}

.section-bg {
  background-color: var(--color-bg-light);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-white);
  box-shadow: var(--shadow-sm);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo a {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.5px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-primary-dark);
  cursor: pointer;
  padding: var(--space-xs);
  min-height: 44px;
  min-width: 44px;
}

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

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-sm);
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-weight: 500;
  color: var(--color-text-main);
  padding: var(--space-xs);
  display: block;
}

.nav-link:hover, .nav-link:focus {
  color: var(--color-primary);
}

/* Dropdown */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-bg-white);
  box-shadow: var(--shadow-md);
  min-width: 250px;
  border-radius: var(--radius-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
  z-index: 101;
  padding: var(--space-xs) 0;
  list-style: none;
}

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

.dropdown-link {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  color: var(--color-text-main);
  font-size: 0.95rem;
}

.dropdown-link:hover, .dropdown-link:focus {
  background-color: var(--color-bg-light);
  color: var(--color-primary);
}

/* Buttons & CTA */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-align: center;
  min-height: 44px;
  transition: background-color 0.2s ease, transform 0.1s ease;
  border: none;
  cursor: pointer;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--color-primary-dark);
  color: var(--color-bg-white);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-bg-white);
  font-size: 1.1rem;
  box-shadow: 0 4px 14px rgba(230, 81, 0, 0.3);
}

.btn-accent:hover, .btn-accent:focus {
  background-color: var(--color-accent-hover);
  color: var(--color-bg-white);
}

.call-box {
  background: var(--color-bg-light);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-md) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: flex-start;
}

.call-box-text {
  font-size: 1.1rem;
  font-weight: 500;
}

/* Sticky Mobile CTA */
.mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--color-bg-white);
  padding: var(--space-xs) var(--space-sm);
  padding-bottom: max(var(--space-xs), env(safe-area-inset-bottom));
  box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
  z-index: 99;
}

.mobile-cta .btn-accent {
  width: 100%;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-bg-white);
  padding: var(--space-xl) 0;
  text-align: center;
}

.hero h1, .hero p {
  color: var(--color-bg-white);
}

.hero h1 {
  margin-bottom: var(--space-sm);
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto var(--space-md);
  opacity: 0.9;
}

/* Content Grid / Split Layout */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

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

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.card {
  background: var(--color-bg-white);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.card-link {
  margin-top: auto;
  font-weight: 600;
  display: inline-block;
  padding-top: var(--space-sm);
}

/* Breadcrumbs */
.breadcrumbs {
  padding: var(--space-sm) 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  background: var(--color-bg-light);
}

.breadcrumbs a {
  color: var(--color-primary);
}

/* FAQ */
.faq-list {
  list-style: none;
  padding: 0;
}

.faq-item {
  margin-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-sm);
}

.faq-q {
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-xs);
  font-size: 1.1rem;
}

/* Footer */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
  padding: var(--space-lg) 0 var(--space-md);
}

.site-footer h3 {
  color: var(--color-bg-white);
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

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

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: rgba(255,255,255,0.8);
}

.footer-links a:hover {
  color: var(--color-bg-white);
  text-decoration: underline;
}

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

.footer-bottom p {
  margin-bottom: var(--space-xs);
}

/* Responsive Overrides */
@media (max-width: 991px) {
  .nav-toggle {
    display: block;
  }
  
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-bg-white);
    flex-direction: column;
    padding: var(--space-sm);
    box-shadow: var(--shadow-md);
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    transition: clip-path 0.3s ease;
    align-items: flex-start;
  }
  
  .main-nav.is-open {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }
  
  .nav-link {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
  }
  
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: var(--space-sm);
    display: none;
  }
  
  .nav-item.dropdown.is-active .dropdown-menu {
    display: block;
  }

  .mobile-cta {
    display: block;
  }
  
  body {
    padding-bottom: 70px; /* Space for mobile CTA */
  }
}

@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;
  }
}