/* ==========================================================================
   NY Plumbing — Bayside, Queens
   Master Responsive Stylesheet & Design System
   ========================================================================== */

:root {
  --color-primary-navy: #0f233d;
  --color-navy-dark: #0a1728;
  --color-navy-light: #18375e;
  --color-accent-amber: #d97706;
  --color-accent-hover: #b45309;
  --color-accent-light: #fef3c7;
  --color-emergency-red: #dc2626;
  --color-emergency-bg: #fff5f5;
  --color-text-main: #1f2937;
  --color-text-muted: #4b5563;
  --color-text-light: #6b7280;
  --color-bg-white: #ffffff;
  --color-bg-neutral: #f8fafc;
  --color-bg-card: #ffffff;
  --color-border: #e2e8f0;
  --color-border-subtle: #edf2f7;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --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, 0.03);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --max-width: 1200px;
  --header-height: 80px;
}

/* Reset & Base Standards */
*, *::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(--font-family);
  color: var(--color-text-main);
  background-color: var(--color-bg-neutral);
  line-height: 1.65;
  padding-bottom: 72px; /* Space for mobile sticky call bar */
}

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

/* Typography Standards */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary-navy);
  font-weight: 800;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  letter-spacing: -0.5px;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.15rem);
  letter-spacing: -0.3px;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.2rem, 2.2vw, 1.45rem);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

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

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

/* Accessibility Focus Outline */
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 3px solid var(--color-accent-amber);
  outline-offset: 2px;
}

/* Skip Navigation */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--color-accent-amber);
  color: #ffffff;
  padding: 10px 16px;
  z-index: 9999;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 10px;
}

/* Containers & Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Top Info Bar */
.top-bar {
  background-color: var(--color-navy-dark);
  color: #e2e8f0;
  font-size: 0.85rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.top-phone {
  color: #fbbf24;
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.top-phone:hover {
  text-decoration: underline;
  color: #ffffff;
}

/* Main Site Header */
.site-header {
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.logo-mark {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-primary-navy), var(--color-navy-light));
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary-navy);
  line-height: 1.15;
  letter-spacing: -0.4px;
  display: flex;
  flex-direction: column;
}

.logo-sub {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

/* Desktop Navigation */
.desktop-nav {
  display: none;
}

@media (min-width: 992px) {
  .desktop-nav {
    display: flex;
    align-items: center;
  }
}

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

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--color-primary-navy);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.5rem 0.25rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

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

.nav-link.active {
  color: var(--color-accent-amber);
  border-bottom: 2px solid var(--color-accent-amber);
}

/* Dropdown Menu */
.dropdown-toggle {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-navy);
  cursor: pointer;
  padding: 0.5rem 0.25rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.dropdown-toggle:hover, .dropdown-toggle:focus {
  color: var(--color-accent-amber);
}

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

.dropdown:hover .dropdown-icon {
  transform: rotate(180deg);
}

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

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
  display: block;
}

.dropdown-item {
  display: block;
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text-main);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--color-border-subtle);
  transition: all 0.15s ease;
}

.dropdown-item:hover, .dropdown-item:focus {
  background-color: var(--color-bg-neutral);
  color: var(--color-navy-light);
  padding-left: 1.5rem;
}

.dropdown-menu li:last-child .dropdown-item {
  border-bottom: none;
}

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

@media (min-width: 992px) {
  .header-cta {
    display: flex;
    align-items: center;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.7rem 1.35rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.2;
  border: 1px solid transparent;
  min-height: 44px;
}

.btn-primary {
  background-color: var(--color-accent-amber);
  color: #ffffff !important;
  box-shadow: 0 2px 4px rgba(217, 119, 6, 0.25);
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--color-accent-hover);
  color: #ffffff !important;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary-navy) !important;
  border-color: var(--color-primary-navy);
}

.btn-outline:hover, .btn-outline:focus {
  background-color: var(--color-primary-navy);
  color: #ffffff !important;
}

.btn-large {
  font-size: 1.05rem;
  padding: 0.85rem 1.75rem;
}

.btn-block {
  width: 100%;
}

/* Hamburger & Mobile Drawer */
.mobile-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-around;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px;
  cursor: pointer;
}

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

.hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary-navy);
  border-radius: 2px;
  transition: all 0.2s ease;
}

.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: #ffffff;
  padding: 1.5rem;
  overflow-y: auto;
  z-index: 999;
  border-top: 1px solid var(--color-border);
}

.mobile-drawer.open {
  display: block;
}

.mobile-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.mobile-close {
  background: transparent;
  border: none;
  font-size: 2rem;
  line-height: 1;
  color: var(--color-text-main);
  cursor: pointer;
  padding: 0 0.5rem;
}

.mobile-nav-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem 0;
}

.mobile-nav-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.75px;
  color: var(--color-text-light);
  font-weight: 700;
  padding: 1rem 0 0.25rem 0;
}

.mobile-nav-link {
  display: block;
  padding: 0.65rem 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-primary-navy);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-subtle);
}

.mobile-nav-link.active {
  color: var(--color-accent-amber);
}

.mobile-drawer-cta {
  margin-top: 1rem;
}

/* Breadcrumb Navigation */
.breadcrumb-bar {
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
  font-size: 0.875rem;
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--color-text-light);
  margin-right: 0.5rem;
}

.breadcrumb-item a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb-item a:hover {
  color: var(--color-accent-amber);
  text-decoration: underline;
}

.breadcrumb-item.active {
  color: var(--color-primary-navy);
  font-weight: 600;
}

/* Page Hero Section */
.page-hero {
  background: linear-gradient(180deg, #ffffff 0%, var(--color-bg-neutral) 100%);
  padding: 3rem 0;
  border-bottom: 1px solid var(--color-border);
}

.page-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

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

.page-hero-text h1 {
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-primary-navy);
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background-color: var(--color-primary-navy);
  color: #ffffff;
  margin-bottom: 0.85rem;
}

.badge-subtle {
  background-color: var(--color-accent-light);
  color: var(--color-accent-hover);
  border: 1px solid #fde68a;
}

.lead-text {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.framed-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  display: block;
}

/* Content Sections */
.content-section {
  padding: 3.5rem 0;
}

.bg-surface {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 2.5rem auto;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 0.75rem;
  color: var(--color-primary-navy);
}

.section-sub {
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

@media (min-width: 640px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.split-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: start;
}

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

/* Cards & Components */
.card {
  background: #ffffff;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.card h3 {
  margin-top: 0;
  font-size: 1.2rem;
}

.card-link {
  margin-top: auto;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.info-card {
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.card-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-accent-light);
  color: var(--color-accent-hover);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.step-card {
  position: relative;
  padding-top: 2rem;
}

.step-num {
  position: absolute;
  top: 1rem;
  left: 1.25rem;
  width: 32px;
  height: 32px;
  background-color: var(--color-primary-navy);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
}

.step-card h3 {
  margin-top: 0.75rem;
}

.callout-card {
  background-color: var(--color-bg-neutral);
  border-left: 4px solid var(--color-accent-amber);
}

.styled-list {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0;
}

.styled-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 1rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.styled-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent-amber);
  font-weight: 800;
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary-navy), var(--color-navy-dark));
  color: #ffffff;
  padding: 3rem 0;
}

.cta-banner-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
  text-align: center;
}

@media (min-width: 860px) {
  .cta-banner-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  .cta-banner-text {
    max-width: 65%;
  }
}

.cta-banner h2 {
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.cta-banner p {
  color: #cbd5e1;
  margin: 0;
}

/* Emergency Safety Banner */
.emergency-safety-banner {
  background-color: #fee2e2;
  border-bottom: 2px solid #ef4444;
  padding: 1rem 0;
  color: #991b1b;
}

.safety-content {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.safety-icon {
  flex-shrink: 0;
  color: #dc2626;
}

.safety-text strong {
  display: block;
  font-size: 1rem;
  color: #7f1d1d;
  margin-bottom: 0.25rem;
}

.safety-text p {
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.5;
}

/* Service Area Grid */
.service-area-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.area-card {
  padding: 2rem;
}

.area-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
  padding-bottom: 0.75rem;
}

.area-header h3 {
  margin: 0;
  font-size: 1.35rem;
  color: var(--color-primary-navy);
}

/* FAQ Accordion */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
}

details.faq-item {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all 0.15s ease;
}

details.faq-item[open] {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-accent-amber);
}

summary.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary-navy);
  cursor: pointer;
  list-style: none;
}

summary.faq-question::-webkit-details-marker {
  display: none;
}

.faq-icon {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

details[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem 1.5rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Sticky Call Bar (Mobile Viewport) */
.sticky-call-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-primary-navy);
  padding: 0.65rem 1rem;
  z-index: 1000;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.25);
  border-top: 2px solid var(--color-accent-amber);
}

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

.sticky-phone-btn {
  background-color: var(--color-accent-amber);
  color: #ffffff !important;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 44px;
}

/* Site Footer */
.site-footer {
  background-color: var(--color-navy-dark);
  color: #cbd5e1;
  padding: 3.5rem 0 1.5rem 0;
  border-top: 3px solid var(--color-accent-amber);
  font-size: 0.925rem;
}

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

.site-footer a:hover {
  color: #ffffff;
  text-decoration: underline;
}

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

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

@media (min-width: 1024px) {
  .footer-container {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }
}

.footer-logo {
  margin-bottom: 1rem;
}

.footer-logo .logo-mark {
  background: rgba(255, 255, 255, 0.1);
}

.footer-logo .logo-text {
  color: #ffffff;
}

.footer-logo .logo-sub {
  color: #94a3b8;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #94a3b8;
  margin-bottom: 1.25rem;
}

.footer-call-box {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
}

.call-box-label {
  display: block;
  font-size: 0.8rem;
  color: #94a3b8;
  margin-bottom: 0.25rem;
}

.footer-phone {
  color: #fbbf24 !important;
  font-size: 1.15rem;
  font-weight: 800;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-phone:hover {
  color: #ffffff !important;
  text-decoration: underline;
}

.footer-heading {
  color: #ffffff;
  font-size: 1.05rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 0.5rem;
}

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

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

.coverage-text {
  font-size: 0.9rem;
  color: #94a3b8;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.compliance-note {
  font-size: 0.825rem;
  color: #94a3b8;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.footer-legal-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 1.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.5rem;
  margin-top: 2.5rem;
}

.footer-bottom-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 768px) {
  .footer-bottom-content {
    flex-direction: row;
  }
}

.footer-attribution {
  font-size: 0.825rem;
  color: #64748b;
  margin: 0;
}

/* General Utilities */
.text-center { text-align: center; }
.max-width-600 { max-width: 600px; }
.max-width-800 { max-width: 800px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.justify-center { justify-content: center; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mr-3 { margin-right: 1rem; }
.ml-3 { margin-left: 1rem; }