/* ==========================================================================
   RoofExpertUSA — Dallas, Texas Design System & Responsive Stylesheet
   Market: Dallas / Fort Worth Metroplex & North Texas
   Primary Brand Palette:
     Deep Navy: #10243A
     Emergency Orange: #F26A21
     Light Background: #F4F7FA
     Body Text: #253449
     Muted Text: #66758A
     Border: #DCE4EC
     Success: #237A4B
     Error: #B42318
   ========================================================================== */

:root {
  --color-primary: #10243A;
  --color-primary-dark: #0A1726;
  --color-primary-light: #1A3757;
  --color-accent: #F26A21;
  --color-accent-hover: #D95610;
  --color-accent-soft: #FFF1EB;
  --color-bg-light: #F4F7FA;
  --color-surface: #FFFFFF;
  --color-text: #253449;
  --color-text-muted: #66758A;
  --color-border: #DCE4EC;
  --color-success: #237A4B;
  --color-error: #B42318;
  --color-warning-bg: #FEF3C7;
  --color-warning-border: #F59E0B;
  --color-warning-text: #92400E;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(16, 36, 58, 0.08);
  --shadow-md: 0 4px 12px rgba(16, 36, 58, 0.12);
  --shadow-lg: 0 10px 25px rgba(16, 36, 58, 0.16);
  --transition: all 0.2s ease-in-out;
}

/* CSS Reset & Base */
*, *::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-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg-light);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 84px; /* Space for fixed bottom mobile sticky CTA */
}

@media (min-width: 769px) {
  body {
    padding-bottom: 0;
  }
}

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

a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: var(--transition);
}

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

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

/* Skip to main content accessibility */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-accent);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  z-index: 9999;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  transition: top 0.2s ease-in-out;
}

.skip-to-content:focus {
  top: 1rem;
}

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

/* Legal / Referral Disclaimer Utility Banner */
.referral-disclaimer-bar {
  background-color: #0A1726;
  color: #DCE4EC;
  font-size: 0.8125rem;
  line-height: 1.45;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(220, 228, 236, 0.15);
  text-align: center;
}

.referral-disclaimer-bar strong {
  color: #FFFFFF;
}

/* Site Header */
.site-header {
  background-color: var(--color-primary);
  color: #ffffff;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.site-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.logo-brand {
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: #ffffff;
}

.logo-brand .roof {
  color: #ffffff;
}

.logo-brand .expert {
  color: var(--color-accent);
}

.logo-sub {
  font-size: 0.75rem;
  color: #94A3B8;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.1rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-phone-cta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 0.5rem 0.875rem;
  border-radius: var(--border-radius-md);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

.header-phone-cta:hover, .header-phone-cta:focus-visible {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.header-phone-cta svg {
  color: var(--color-accent);
  transition: color 0.2s;
}

.header-phone-cta:hover svg, .header-phone-cta:focus-visible svg {
  color: #ffffff;
}

.header-phone-details {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.header-phone-badge {
  font-size: 0.6875rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #FED7AA;
}

.header-phone-num {
  font-size: 1.05rem;
  font-weight: 800;
  color: #ffffff;
  white-space: nowrap;
}

/* Primary Navigation */
.main-nav {
  background-color: var(--color-primary-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-scroll-list {
  display: flex;
  align-items: center;
  list-style: none;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  padding: 0.35rem 0;
  gap: 0.5rem;
  scrollbar-width: none;
}

.nav-scroll-list::-webkit-scrollbar {
  display: none;
}

.nav-link {
  color: #DCE4EC;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.45rem 0.75rem;
  border-radius: var(--border-radius-sm);
  display: inline-block;
  transition: var(--transition);
}

.nav-link:hover, .nav-link:focus-visible {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.12);
}

.nav-link.active {
  color: #ffffff;
  background-color: var(--color-accent);
}

/* Breadcrumbs */
.breadcrumb-nav {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
  padding: 0.65rem 0;
  font-size: 0.875rem;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  gap: 0.4rem;
  color: var(--color-text-muted);
}

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

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

.breadcrumb-separator {
  color: #94A3B8;
  font-size: 0.75rem;
}

.breadcrumb-item[aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  padding: 2.75rem 0;
  position: relative;
  overflow: hidden;
}

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

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }
}

.hero-tagline {
  display: inline-block;
  background-color: rgba(242, 106, 33, 0.2);
  color: #FED7AA;
  border: 1px solid rgba(242, 106, 33, 0.4);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 0.85rem;
}

.hero-title {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.15;
  color: #ffffff;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 2.65rem;
  }
}

.hero-description {
  font-size: 1.05rem;
  line-height: 1.6;
  color: #DCE4EC;
  margin-bottom: 1.75rem;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  padding: 0.85rem 1.5rem;
  border-radius: var(--border-radius-md);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  text-align: center;
}

.btn-emergency {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
  box-shadow: 0 4px 14px rgba(242, 106, 33, 0.35);
}

.btn-emergency:hover, .btn-emergency:focus-visible {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  color: #ffffff;
  border-color: #DCE4EC;
}

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

.btn-block {
  width: 100%;
}

/* Hero Lead Form Card */
.hero-form-card {
  background-color: #ffffff;
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
  color: var(--color-text);
  border-top: 4px solid var(--color-accent);
}

/* Forms */
.lead-form .form-group {
  margin-bottom: 1rem;
}

.lead-form label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.3rem;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  width: 100%;
  padding: 0.75rem 0.875rem;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  border: 1.5px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background-color: #ffffff;
  color: var(--color-text);
  transition: var(--transition);
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(242, 106, 33, 0.15);
}

.form-checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-top: 0.75rem;
  margin-bottom: 1rem;
}

.form-checkbox-group input[type="checkbox"] {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.2rem;
  accent-color: var(--color-accent);
  flex-shrink: 0;
}

.checkbox-label {
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--color-text-muted);
}

.form-error {
  color: var(--color-error);
  font-size: 0.8125rem;
  margin-top: 0.25rem;
  display: none;
  font-weight: 600;
}

.has-error input, .has-error select, .has-error textarea {
  border-color: var(--color-error);
  background-color: #FEF2F2;
}

.has-error .form-error {
  display: block;
}

.form-feedback {
  margin-top: 1rem;
  padding: 0.875rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  display: none;
  line-height: 1.5;
}

.form-feedback.success {
  display: block;
  background-color: #ECFDF5;
  border: 1px solid #10B981;
  color: var(--color-success);
}

.form-feedback.error {
  display: block;
  background-color: #FEF2F2;
  border: 1px solid #EF4444;
  color: var(--color-error);
}

/* Sections */
.section {
  padding: 3.25rem 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 2.25rem auto;
}

.section-header h2 {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

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

/* Critical Warning Box */
.critical-warning-box {
  background-color: #FFF7ED;
  border-left: 5px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  border-radius: var(--border-radius-md);
  margin: 1.75rem 0;
  box-shadow: var(--shadow-sm);
}

.critical-warning-box h3 {
  color: #C2410C;
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.critical-warning-box p {
  font-size: 0.95rem;
  line-height: 1.55;
  color: #7C2D12;
}

/* Cards & Grids */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-md);
  padding: 1.65rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #CBD5E1;
}

.service-card-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.15rem;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}

.service-card p {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.service-card-link {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

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

/* Content Columns & Grids */
.info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .info-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

.info-card {
  background-color: #ffffff;
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.info-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}

.info-card p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.6;
}

/* FAQ Accordion */
.accordion-item {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  margin-bottom: 0.85rem;
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.15rem 1.35rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.accordion-header:hover {
  background-color: #F8FAFC;
}

.accordion-icon {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
}

.accordion-content {
  padding: 0 1.35rem 1.25rem 1.35rem;
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Mobile Sticky Bottom CTA Bar */
.mobile-sticky-bar {
  display: block;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  background-color: var(--color-primary);
  border-top: 3px solid var(--color-accent);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.25);
  padding: 0.65rem 1rem calc(0.65rem + env(safe-area-inset-bottom));
}

@media (min-width: 769px) {
  .mobile-sticky-bar {
    display: none;
  }
}

.mobile-sticky-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  background-color: var(--color-accent);
  color: #ffffff;
  text-decoration: none;
  border-radius: var(--border-radius-md);
  padding: 0.8rem 1rem;
  font-weight: 800;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.mobile-cta-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  text-align: left;
}

.mobile-cta-title {
  font-size: 0.725rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #FED7AA;
}

.mobile-cta-num {
  font-size: 1.15rem;
}

/* Footer */
.site-footer {
  background-color: var(--color-primary-dark);
  color: #CBD5E1;
  padding: 3.5rem 0 2rem 0;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-compliance-card {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--border-radius-md);
  padding: 1.25rem;
  margin-bottom: 2.25rem;
  font-size: 0.85rem;
  line-height: 1.55;
  color: #94A3B8;
}

.footer-compliance-card strong {
  color: #FED7AA;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 600px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.footer-column h4 {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

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

.footer-links-list li {
  margin-bottom: 0.55rem;
}

.footer-links-list a {
  color: #94A3B8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-bottom-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.825rem;
  color: #64748B;
}

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

.footer-bottom-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-bottom-nav a {
  color: #94A3B8;
  text-decoration: none;
}

.footer-bottom-nav a:hover {
  color: #ffffff;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}