/* ==========================================================================
   NY Plumbing — Middle Village, Queens, NYC
   Comprehensive Responsive Stylesheet & Design System
   Targeting: Boiler Repair & Mechanical Services in Middle Village, Queens
   ========================================================================== */

:root {
  /* Core Color System */
  --color-primary: #0b1f3a;         /* Deep Navy */
  --color-primary-dark: #071324;    /* Midnight Navy */
  --color-primary-light: #16365c;   /* Slate Navy */
  --color-secondary: #334155;       /* Charcoal Body */
  --color-muted: #64748b;           /* Muted Slate */
  --color-accent: #ea580c;          /* High-Contrast Phone CTA Orange */
  --color-accent-hover: #c2410c;    /* Deep Flame Accent */
  --color-accent-light: #fff7ed;    /* Warm Tint */
  --color-emergency: #991b1b;       /* Gas Safety Alert Crimson */
  --color-emergency-bg: #fef2f2;    /* Alert Background */

  /* Neutral Surfaces */
  --color-bg-main: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-dark: #cbd5e1;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout & Spacing */
  --container-max: 1200px;
  --container-narrow: 860px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Elevation Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

html {
  font-family: var(--font-sans);
  color: var(--color-secondary);
  background-color: var(--color-bg-main);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 72px; /* Space for sticky mobile call bar */
}

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

a {
  color: var(--color-primary-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

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

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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 3.8vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 2.8vw, 2rem); margin-top: 2rem; margin-bottom: 1rem; }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.45rem); margin-top: 1.5rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.15rem; margin-top: 1.25rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1.25rem; }
ul, ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }
strong { color: var(--color-primary); font-weight: 700; }

/* Skip to Content Link */
.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  background: var(--color-accent);
  color: #ffffff;
  padding: 10px 18px;
  z-index: 10000;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
  outline: 3px solid #ffffff;
}

/* Accessibility Focus States */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Top Emergency Bar */
.emergency-bar {
  background-color: var(--color-emergency);
  color: #ffffff;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  text-align: center;
  line-height: 1.4;
}

.emergency-bar strong {
  color: #ffffff;
}

/* Site Header */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  gap: 1rem;
}

.site-logo {
  display: flex;
  flex-direction: column;
}

.logo-link {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.5px;
  line-height: 1.1;
}

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

.logo-location {
  font-size: 0.78rem;
  color: var(--color-muted);
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

/* Main Navigation */
.main-nav {
  display: none;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 1.25rem;
  align-items: center;
  margin: 0;
  padding: 0;
}

.nav-link {
  text-decoration: none;
  color: var(--color-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0.25rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

/* Services Dropdown */
.dropdown {
  position: relative;
}

.dropdown-trigger {
  background: transparent;
  border: none;
  color: var(--color-secondary);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.25rem;
}

.dropdown-trigger:hover,
.dropdown-trigger[aria-expanded="true"] {
  color: var(--color-accent);
}

.dropdown-trigger svg {
  transition: transform 0.2s ease;
}

.dropdown-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #ffffff;
  min-width: 270px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  list-style: none;
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  z-index: 200;
}

.dropdown-menu.show {
  display: block;
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: 0.65rem 1.25rem;
  color: var(--color-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.dropdown-menu a:hover,
.dropdown-menu a.active {
  background-color: var(--color-bg-subtle);
  color: var(--color-accent);
}

/* Header Action CTA */
.header-cta {
  display: none;
}

.menu-toggle {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
}

.menu-toggle:hover {
  background: var(--color-border);
}

/* Mobile Nav Drawer */
@media (max-width: 991px) {
  .main-nav.mobile-active {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 2px solid var(--color-border);
    box-shadow: var(--shadow-xl);
    padding: 1.25rem;
    z-index: 150;
  }

  .main-nav.mobile-active .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .main-nav.mobile-active .nav-link {
    display: block;
    padding: 0.75rem 0.5rem;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--color-bg-alt);
  }

  .main-nav.mobile-active .dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    background: var(--color-bg-subtle);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-top: 0.25rem;
  }

  .main-nav.mobile-active .dropdown-menu a {
    padding: 0.6rem 0.75rem;
  }

  .main-nav.mobile-active .dropdown-trigger {
    width: 100%;
    justify-content: space-between;
    padding: 0.75rem 0.5rem;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--color-bg-alt);
  }
}

@media (min-width: 992px) {
  .main-nav {
    display: block;
  }

  .menu-toggle {
    display: none;
  }

  .header-cta {
    display: inline-flex;
  }
}

/* Breadcrumbs */
.breadcrumbs-nav {
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
  padding: 0.65rem 0;
  font-size: 0.85rem;
}

.breadcrumbs-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin: 0;
  padding: 0;
}

.breadcrumbs-list li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--color-muted);
}

.breadcrumbs-list a {
  color: var(--color-muted);
  text-decoration: none;
}

.breadcrumbs-list a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.breadcrumbs-list li[aria-current="page"] {
  color: var(--color-secondary);
  font-weight: 600;
}

/* Main Layout & Containers */
main {
  flex: 1 0 auto;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background-color: var(--color-bg-subtle);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-light) 100%);
  color: #ffffff;
  padding: 3.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }
}

.hero-badge {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1.25rem;
}

.hero-title {
  color: #ffffff;
  font-size: clamp(2.1rem, 4.2vw, 3.1rem);
  line-height: 1.15;
  margin-bottom: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}

.lead {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.75rem;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
}

.hero-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 2px solid rgba(255, 255, 255, 0.15);
  object-fit: cover;
}

/* Call-to-Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  min-height: 48px;
  text-align: center;
  line-height: 1.2;
}

.btn:active {
  transform: translateY(1px);
}

.btn-phone {
  background-color: var(--color-accent);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.35);
}

.btn-phone:hover {
  background-color: var(--color-accent-hover);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(234, 88, 12, 0.45);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.btn-large {
  padding: 1.1rem 2.25rem;
  font-size: 1.15rem;
}

/* Content Cards & Trouble Grids */
.trouble-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 2rem 0;
}

@media (min-width: 640px) {
  .trouble-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.trouble-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.trouble-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.trouble-card h3 {
  font-size: 1.15rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.trouble-card p {
  font-size: 0.95rem;
  color: var(--color-secondary);
  margin-bottom: 0;
}

/* Service Nav Cards */
.service-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2.5rem 0;
}

@media (min-width: 640px) {
  .service-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.service-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.service-card h3 {
  font-size: 1.25rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.service-card .card-link {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.service-card .card-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Callout & Alert Boxes */
.alert-box {
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2rem 0;
}

.alert-emergency {
  background-color: var(--color-emergency-bg);
  border-left: 5px solid var(--color-emergency);
  color: #7f1d1d;
}

.alert-emergency h3 {
  color: var(--color-emergency);
  margin-top: 0;
}

.alert-emergency p {
  color: #7f1d1d;
  margin-bottom: 0.75rem;
}

.alert-emergency p:last-child {
  margin-bottom: 0;
}

/* FAQ Accordion / List */
.faq-section {
  margin-top: 2.5rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-q {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  padding: 1.25rem 1.5rem;
  margin: 0;
  background-color: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
}

.faq-a {
  padding: 1.25rem 1.5rem;
  color: var(--color-secondary);
  font-size: 0.98rem;
  line-height: 1.7;
}

.faq-a p:last-child {
  margin-bottom: 0;
}

/* Styled Lists */
.styled-list {
  list-style: none;
  padding-left: 0;
  margin: 1.5rem 0;
}

.styled-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.85rem;
}

.styled-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent);
  font-weight: 900;
}

/* Mid-Page Callout CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #ffffff;
  padding: 3rem 1.5rem;
  text-align: center;
  border-radius: var(--radius-lg);
  margin: 3.5rem 0;
}

.cta-banner h2 {
  color: #ffffff;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-top: 0;
  margin-bottom: 1rem;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 650px;
  margin: 0 auto 1.75rem;
  font-size: 1.05rem;
}

/* Site Footer */
.site-footer {
  background-color: var(--color-primary-dark);
  color: #cbd5e1;
  padding: 3.5rem 0 2rem;
  font-size: 0.9rem;
  line-height: 1.6;
  border-top: 4px solid var(--color-accent);
}

.site-footer a {
  color: #cbd5e1;
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
}

.footer-col h3 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 1rem;
  letter-spacing: -0.2px;
}

.footer-col p {
  margin-bottom: 0.85rem;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-contact-details {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-phone-link {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-accent) !important;
}

/* Legal & Compliance Block */
.footer-legal-block {
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  color: #94a3b8;
  line-height: 1.6;
}

.footer-legal-block h4 {
  color: #e2e8f0;
  font-size: 0.95rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.footer-legal-block p {
  margin-bottom: 0.75rem;
}

.footer-bottom {
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  text-align: center;
  font-size: 0.82rem;
  color: #64748b;
}

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

/* Fixed Mobile Sticky Call Bar */
.mobile-call-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-primary-dark);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-top: 2px solid var(--color-accent);
  z-index: 999;
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.2);
}

@media (min-width: 992px) {
  .mobile-call-bar {
    display: none;
  }
}

.mobile-call-text {
  display: flex;
  flex-direction: column;
}

.mobile-call-text strong {
  color: #ffffff;
  font-size: 0.95rem;
  line-height: 1.2;
}

.mobile-call-text span {
  font-size: 0.78rem;
  color: #94a3b8;
}

.mobile-call-btn {
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(234, 88, 12, 0.4);
}

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

/* Print Stylesheet */
@media print {
  .emergency-bar,
  .site-header,
  .mobile-call-bar,
  .btn,
  .cta-banner {
    display: none !important;
  }

  body {
    padding-bottom: 0;
    color: #000000;
    background: #ffffff;
  }

  a {
    text-decoration: none;
    color: #000000;
  }
}