/* ==========================================================================
   NY PLUMBING — UNIONPORT, BRONX, NY
   Master Stylesheet (styles.css)
   Design Direction: Industrial Navy & Safety Amber Accent
   Strict Constraint: ZERO IMAGES (No img, SVG, url(), gradients, or base64)
   Custom Class Namespace: .unp- (Mandatory Anti-Footprinting Structure)
   ========================================================================== */

:root {
  /* High-Contrast Primary & Secondary Palette */
  --unp-navy-950: #0a1128;
  --unp-navy-900: #101f42;
  --unp-navy-800: #1c2d5a;
  --unp-navy-700: #2b3f75;
  
  --unp-primary: #101f42;
  --unp-primary-dark: #0a1128;
  --unp-secondary: #1c2d5a;
  
  --unp-accent: #d95d04;
  --unp-accent-hover: #b84b00;
  --unp-amber-500: #d95d04;
  --unp-amber-600: #b84b00;
  
  --unp-bg-light: #f8fafc;
  --unp-gray-50: #f8fafc;
  --unp-gray-100: #f1f5f9;
  --unp-gray-200: #e2e8f0;
  --unp-gray-300: #cbd5e1;
  --unp-gray-600: #475569;
  --unp-gray-700: #334155;
  --unp-charcoal: #0f172a;
  --unp-text-muted: #94a3b8;
  --unp-white: #ffffff;
  
  --unp-border: #e2e8f0;
  --unp-border-dark: #2b3f75;
  
  /* Modern Clean Typography */
  --unp-font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --unp-container-max: 1180px;
  --unp-radius: 4px;
}

/* Base 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 {
  font-family: var(--unp-font-base);
  color: var(--unp-charcoal);
  background-color: var(--unp-white);
  line-height: 1.65;
  padding-bottom: 74px; /* Space for mobile sticky call bar */
}

@media (min-width: 992px) {
  body {
    padding-bottom: 0;
  }
}

/* Typography Hierarchy */
h1, h2, h3, h4 {
  color: var(--unp-navy-950);
  font-family: var(--unp-font-base);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.1rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.65rem;
  margin-top: 1.5rem;
  letter-spacing: -0.015em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--unp-gray-200);
}

h3 {
  font-size: 1.25rem;
  margin-top: 1.25rem;
}

p {
  margin-bottom: 1.25rem;
  color: var(--unp-gray-700);
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--unp-gray-700);
}

li {
  margin-bottom: 0.5rem;
}

a {
  color: var(--unp-navy-800);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover, a:focus {
  color: var(--unp-accent);
}

/* Layout Containers & Sections */
.unp-container {
  width: 100%;
  max-width: var(--unp-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.unp-section {
  padding: 56px 0;
}

.unp-section-light {
  background-color: var(--unp-bg-light);
  border-top: 1px solid var(--unp-gray-200);
  border-bottom: 1px solid var(--unp-gray-200);
}

.unp-section-heading {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 36px auto;
}

.unp-section-heading h2 {
  border-bottom: none;
  padding-bottom: 0;
  margin-top: 0;
}

.unp-section-heading p {
  font-size: 1.05rem;
  color: var(--unp-gray-600);
  margin-top: 0.5rem;
}

/* ==========================================================================
   TOPBAR EMERGENCY DISPATCH STRIP
   ========================================================================== */
.unp-topbar {
  background-color: var(--unp-navy-950);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  font-size: 0.85rem;
  padding: 6px 0;
}

.unp-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.unp-topbar-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.unp-topbar-phone {
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.unp-topbar-phone:hover {
  color: var(--unp-accent);
}

.unp-topbar-phone-label {
  color: var(--unp-accent);
}

/* ==========================================================================
   MAIN SITE HEADER & RESPONSIVE NAVIGATION MENU
   ========================================================================== */
.unp-header {
  background-color: var(--unp-navy-900);
  color: var(--unp-white);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 3px solid var(--unp-accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.unp-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 8px 0;
}

.unp-brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--unp-white);
}

.unp-brand-primary {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--unp-white);
  line-height: 1.1;
}

.unp-brand-sub {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--unp-accent);
  font-weight: 600;
}

/* Hamburger Menu Toggle Button */
.unp-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--unp-radius);
  padding: 10px;
  cursor: pointer;
  z-index: 1100;
}

.unp-hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--unp-white);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.unp-menu-toggle[aria-expanded="true"] .unp-hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.unp-menu-toggle[aria-expanded="true"] .unp-hamburger-line:nth-child(2) {
  opacity: 0;
}

.unp-menu-toggle[aria-expanded="true"] .unp-hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Desktop Navigation */
.unp-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.unp-nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 6px;
}

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

.unp-nav-link {
  color: var(--unp-white);
  text-decoration: none;
  padding: 8px 14px;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border-radius: var(--unp-radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.unp-nav-link:hover,
.unp-nav-link:focus,
.unp-nav-link.is-active {
  background-color: var(--unp-navy-800);
  color: var(--unp-accent);
}

/* Dropdown Menu */
.unp-dropdown-caret {
  font-size: 0.7rem;
  transition: transform 0.2s ease;
}

.unp-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--unp-navy-950);
  min-width: 280px;
  border-radius: var(--unp-radius);
  list-style: none;
  padding: 8px 0;
  border: 1px solid #203a68;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.45);
  z-index: 1050;
  margin: 0;
}

.unp-dropdown-menu li {
  margin: 0;
}

.unp-dropdown-menu a {
  display: block;
  padding: 10px 18px;
  color: #e2e8f0;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease, padding-left 0.15s ease;
}

.unp-dropdown-menu a:hover,
.unp-dropdown-menu a:focus,
.unp-dropdown-menu a.is-active {
  background-color: var(--unp-navy-800);
  color: var(--unp-accent);
  padding-left: 22px;
}

/* Show Dropdown on Hover/Focus on Desktop */
@media (min-width: 993px) {
  .unp-nav-item.has-dropdown:hover .unp-dropdown-menu,
  .unp-nav-item.has-dropdown:focus-within .unp-dropdown-menu {
    display: block;
  }
}

.unp-nav-cta {
  display: block;
}

/* Mobile & Tablet Navigation Rules */
@media (max-width: 992px) {
  .unp-menu-toggle {
    display: flex;
  }

  .unp-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--unp-navy-950);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px 20px;
    border-bottom: 3px solid var(--unp-accent);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    z-index: 9999;
  }

  .unp-nav.is-open {
    display: flex;
  }

  .unp-nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .unp-nav-item {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .unp-nav-link {
    width: 100%;
    padding: 14px 10px;
    font-size: 1.05rem;
    justify-content: space-between;
  }

  .unp-dropdown-menu {
    position: static;
    display: none;
    background-color: rgba(0, 0, 0, 0.4);
    border: none;
    box-shadow: none;
    min-width: 100%;
    padding: 0 0 8px 12px;
  }

  .unp-nav-item.has-dropdown.is-expanded .unp-dropdown-menu {
    display: block;
  }

  .unp-nav-item.has-dropdown.is-expanded .unp-dropdown-caret {
    transform: rotate(180deg);
  }

  .unp-nav-cta {
    margin-top: 16px;
    text-align: center;
  }

  .unp-nav-cta .unp-btn {
    width: 100%;
    padding: 14px;
    font-size: 1.05rem;
  }
}

/* ==========================================================================
   BUTTON SYSTEM (TELEPHONE-FIRST CTAS)
   ========================================================================== */
.unp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: var(--unp-radius);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  min-height: 44px;
  min-width: 44px;
}

.unp-btn:hover {
  transform: translateY(-1px);
}

.unp-btn-accent {
  background-color: var(--unp-accent);
  color: #ffffff !important;
  border: 1px solid var(--unp-accent);
}

.unp-btn-accent:hover,
.unp-btn-accent:focus {
  background-color: var(--unp-accent-hover);
  color: #ffffff !important;
}

.unp-btn-primary {
  background-color: var(--unp-primary);
  color: #ffffff !important;
  border: 1px solid var(--unp-primary-dark);
}

.unp-btn-primary:hover,
.unp-btn-primary:focus {
  background-color: var(--unp-navy-950);
}

.unp-btn-outline {
  background-color: transparent;
  color: var(--unp-white) !important;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.unp-btn-outline:hover,
.unp-btn-outline:focus {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
}

.unp-btn-large {
  padding: 14px 26px;
  font-size: 1.1rem;
}

/* Badges */
.unp-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--unp-radius);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.unp-badge-warning {
  background-color: #fff3eb;
  color: var(--unp-accent);
  border: 1px solid var(--unp-accent);
}

.unp-badge-primary {
  background-color: var(--unp-navy-800);
  color: #ffffff;
}

.unp-badge-secondary {
  background-color: #e2e8f0;
  color: var(--unp-charcoal);
}

/* ==========================================================================
   BREADCRUMBS
   ========================================================================== */
.unp-breadcrumbs {
  background-color: var(--unp-gray-100);
  border-bottom: 1px solid var(--unp-gray-200);
  padding: 10px 0;
  font-size: 0.88rem;
}

.unp-breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 8px;
}

.unp-breadcrumbs-item a {
  color: var(--unp-gray-600);
  text-decoration: none;
}

.unp-breadcrumbs-item a:hover {
  text-decoration: underline;
  color: var(--unp-navy-950);
}

.unp-breadcrumbs-separator {
  color: var(--unp-gray-600);
}

/* ==========================================================================
   HERO SECTION (ZERO-IMAGE DESIGN SYSTEM)
   ========================================================================== */
.unp-hero {
  background-color: var(--unp-navy-900);
  color: var(--unp-white);
  padding: 60px 0;
  border-bottom: 4px solid var(--unp-accent);
}

.unp-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

@media (min-width: 992px) {
  .unp-hero-grid {
    grid-template-columns: 1.25fr 0.75fr;
  }
}

.unp-hero-tag {
  display: inline-block;
  background-color: var(--unp-navy-800);
  color: var(--unp-accent);
  border: 1px solid var(--unp-accent);
  padding: 4px 12px;
  border-radius: var(--unp-radius);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.unp-hero-title {
  color: var(--unp-white);
  font-size: 2.3rem;
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.unp-hero-subtitle {
  color: #cbd5e1;
  font-size: 1.15rem;
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.unp-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.unp-hero-card {
  background-color: var(--unp-navy-950);
  border: 2px solid var(--unp-navy-700);
  border-top: 4px solid var(--unp-accent);
  border-radius: var(--unp-radius);
  padding: 24px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.unp-hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  gap: 10px;
}

.unp-hero-card-header h3 {
  color: var(--unp-white);
  margin-top: 0;
  font-size: 1.2rem;
}

.unp-hero-card .unp-checklist li {
  color: #f1f5f9;
  font-size: 0.95rem;
}

.unp-hero-card .unp-checklist li strong {
  color: #fbbf24;
}

.unp-hero-card .unp-checklist li::before {
  color: #fbbf24;
}

/* ==========================================================================
   CARDS, GRIDS & TECHNICAL MATRICES
   ========================================================================== */
.unp-grid {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.unp-grid-2 {
  grid-template-columns: 1fr;
}

.unp-grid-3 {
  grid-template-columns: 1fr;
}

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

@media (min-width: 992px) {
  .unp-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.unp-card {
  background-color: var(--unp-white);
  border: 1px solid var(--unp-gray-200);
  border-top: 3px solid var(--unp-navy-800);
  border-radius: var(--unp-radius);
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.unp-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  gap: 8px;
}

.unp-card-header h3 {
  margin: 0;
}

.unp-checklist {
  list-style: none;
  padding: 0;
  margin: 14px 0;
}

.unp-checklist li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: var(--unp-gray-700);
}

.unp-checklist li::before {
  content: "✔";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--unp-accent);
  font-size: 0.9rem;
}

/* Technical Comparison Table */
.unp-table-responsive {
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--unp-gray-200);
  border-radius: var(--unp-radius);
}

.unp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.unp-table th {
  background-color: var(--unp-navy-900);
  color: var(--unp-white);
  padding: 14px 18px;
  font-weight: 700;
}

.unp-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--unp-gray-200);
  color: var(--unp-gray-700);
}

.unp-table tr:nth-child(even) td {
  background-color: var(--unp-gray-50);
}

/* Numbered Steps */
.unp-steps {
  list-style: none;
  padding: 0;
  margin: 28px 0;
}

.unp-step {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
}

.unp-step-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background-color: var(--unp-navy-900);
  color: var(--unp-accent);
  border: 2px solid var(--unp-accent);
  border-radius: var(--unp-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.15rem;
}

.unp-step-content h3 {
  margin-top: 0;
  font-size: 1.15rem;
  color: var(--unp-navy-950);
  margin-bottom: 6px;
}

.unp-step-content p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Callout Box */
.unp-callout {
  background-color: var(--unp-navy-900);
  color: var(--unp-white);
  border-left: 6px solid var(--unp-accent);
  border-radius: var(--unp-radius);
  padding: 32px;
  margin: 28px 0;
}

.unp-callout h2, .unp-callout h3 {
  color: var(--unp-white);
  margin-top: 0;
}

.unp-callout p {
  color: #cbd5e1;
  font-size: 1.05rem;
  margin-bottom: 0;
}

/* FAQs */
.unp-faq-item {
  border: 1px solid var(--unp-gray-200);
  border-radius: var(--unp-radius);
  margin-bottom: 14px;
  background-color: var(--unp-white);
  padding: 20px;
}

.unp-faq-q {
  color: var(--unp-navy-950);
  font-size: 1.15rem;
  margin-top: 0;
  margin-bottom: 8px;
}

.unp-faq-a p {
  margin-bottom: 0;
  font-size: 0.98rem;
  color: var(--unp-gray-700);
}

/* ==========================================================================
   FOOTER (CONTRASTING DARK NAVY)
   ========================================================================== */
.unp-footer {
  background-color: var(--unp-navy-950);
  color: var(--unp-white);
  padding: 56px 0 28px 0;
  border-top: 3px solid var(--unp-accent);
}

.unp-footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

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

@media (min-width: 992px) {
  .unp-footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
  }
}

.unp-footer-col h3 {
  color: var(--unp-white);
  font-size: 1.05rem;
  margin-top: 0;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--unp-accent);
  padding-bottom: 6px;
  display: inline-block;
}

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

.unp-footer-links li {
  margin-bottom: 8px;
}

.unp-footer-links a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.unp-footer-links a:hover,
.unp-footer-links a:focus,
.unp-footer-links a.is-active {
  color: var(--unp-accent);
  text-decoration: underline;
  transform: translateX(3px);
}

.unp-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
  color: #94a3b8;
}

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

.unp-footer-bottom a {
  color: var(--unp-accent);
}

/* ==========================================================================
   STICKY MOBILE CALL BAR (MANDATORY 44X44PX TOUCH TARGET)
   ========================================================================== */
.unp-mobile-callbar {
  display: block;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--unp-navy-950);
  padding: 10px 16px;
  z-index: 999;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.4);
  border-top: 2px solid var(--unp-accent);
}

@media (min-width: 993px) {
  .unp-mobile-callbar {
    display: none;
  }
}

.unp-mobile-call-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--unp-accent);
  color: #ffffff !important;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 12px;
  min-height: 48px;
  border-radius: var(--unp-radius);
  text-align: center;
}

.unp-mobile-call-btn:active {
  background-color: var(--unp-accent-hover);
}