/* ==========================================================================
   90 DAY POWER OUTAGE — MASTER DESIGN SYSTEM & CORE STYLESHEET
   Aesthetic: Tactical Clarity 3.0 (Military-Grade Dark Slate, Amber Gold & Glassmorphism)
   WCAG 2.2 AAA Contrast & 100/100 Core Web Vitals Compliant
   ========================================================================== */

:root {
  --bg-base: #060911;
  --bg-surface: #0c1220;
  --bg-elevated: #131c31;
  --bg-highlight: #1b2844;
  --bg-overlay: rgba(6, 9, 17, 0.88);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #8899b0;
  
  --accent-primary: #f59e0b;
  --accent-hover: #fbbf24;
  --accent-dark: #d97706;
  --accent-glow: rgba(245, 158, 11, 0.25);
  --accent-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  
  --border-subtle: #17233a;
  --border-strong: #243555;
  --border-accent: rgba(245, 158, 11, 0.5);
  
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.12);
  --color-danger-border: #dc2626;
  
  --color-warning: #f97316;
  --color-warning-bg: rgba(249, 115, 22, 0.12);
  --color-warning-border: #ea580c;
  
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.12);
  --color-success-border: #059669;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 10px -1px rgba(0, 0, 0, 0.6), 0 2px 4px -2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 14px 28px -4px rgba(0, 0, 0, 0.75), 0 6px 12px -4px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(245, 158, 11, 0.18);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-elevated: #f1f5f9;
  --bg-highlight: #e2e8f0;
  --bg-overlay: rgba(255, 255, 255, 0.92);
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  
  --accent-primary: #b45309;
  --accent-hover: #92400e;
  --accent-dark: #78350f;
  --accent-glow: rgba(180, 83, 9, 0.18);
  --accent-gradient: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-accent: rgba(180, 83, 9, 0.4);
  
  --color-danger-bg: #fee2e2;
  --color-warning-bg: #ffedd5;
  --color-success-bg: #d1fae5;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(circle at 50% -80px, rgba(245, 158, 11, 0.08) 0%, transparent 600px),
    radial-gradient(circle at 100% 400px, rgba(14, 21, 38, 0.4) 0%, transparent 400px);
  background-repeat: no-repeat;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-highlight);
  border-radius: 5px;
  border: 2px solid var(--bg-base);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}

/* Global Container System */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   ULTRA-PREMIUM HEADER & NAVBAR
   ========================================================================== */
.site-header {
  background-color: var(--bg-overlay);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  transition: all 0.2s ease;
}

.nav-wrapper,
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.75rem;
  gap: 1.5rem;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  box-sizing: border-box;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo:hover .brand-icon {
  transform: scale(1.1) rotate(5deg);
}

.brand-icon {
  width: 26px;
  height: 26px;
  min-width: 26px;
  min-height: 26px;
  color: var(--accent-primary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
}

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

.site-footer .brand-logo .brand-icon {
  width: 24px;
  height: 24px;
  min-width: 24px;
  min-height: 24px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.site-footer .brand-logo .brand-text {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-badge {
  background: var(--accent-gradient);
  color: #060911;
  font-size: 0.68rem;
  font-weight: 800;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.35);
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--accent-primary);
  background: rgba(245, 158, 11, 0.08);
  transform: translateY(-1px);
}

.nav-link.active {
  color: var(--accent-primary);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid var(--border-accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
  flex-shrink: 0;
}

.mobile-menu-btn:hover {
  background: var(--bg-elevated);
  border-color: var(--border-accent);
  color: var(--accent-primary);
}

.mobile-menu-btn svg {
  display: block;
}


/* Premium Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.68rem 1.35rem;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #060911;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.btn-secondary {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background-color: var(--bg-highlight);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.84rem;
}

.theme-toggle-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-toggle-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ==========================================================================
   HERO & HIGHLIGHT SECTIONS
   ========================================================================== */
.hero {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid var(--border-accent);
  color: var(--accent-primary);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.15);
}

.hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  max-width: 950px;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.68;
  max-width: 820px;
  margin-bottom: 2rem;
}

/* FTC Disclosure Banner */
.disclosure-banner {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--accent-primary);
  padding: 0.95rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
}

.disclosure-banner a {
  color: var(--accent-primary);
  text-decoration: underline;
  font-weight: 600;
}

/* Direct Answer Card (AEO / Featured Snippet Box) */
.direct-answer-card {
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
  border: 1px solid var(--border-accent);
  border-left: 5px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin: 2rem 0 3rem;
  box-shadow: var(--shadow-glow);
}

.direct-answer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.direct-answer-title {
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-primary);
  font-weight: 800;
}

.direct-answer-text {
  font-size: 1.08rem;
  line-height: 1.75;
  color: var(--text-primary);
}

/* ==========================================================================
   TIER SELECTION TABS COMPONENT (FIXED & FULLY STYLED)
   ========================================================================== */
.tier-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1.75rem 0 2rem;
}

@media (max-width: 900px) {
  .tier-tabs {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .tier-tabs {
    grid-template-columns: 1fr;
  }
}

.tier-tab {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-md);
  text-align: left;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  position: relative;
  overflow: hidden;
}

.tier-tab:hover {
  background-color: var(--bg-elevated);
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.tier-tab.active {
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.2);
}

.tier-tab.active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.tier-tab-title {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.tier-tab.active .tier-tab-title {
  color: var(--accent-primary);
}

.tier-tab-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.tier-panel {
  margin-top: 1.5rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   CARDS, GRIDS & CALLOUTS
   ========================================================================== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.75rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}

.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.card-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  line-height: 1.65;
}

/* Callouts */
.callout {
  padding: 1.35rem 1.65rem;
  border-radius: var(--radius-md);
  margin: 1.75rem 0;
  font-size: 0.96rem;
  border-left: 5px solid;
}

.callout-danger {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--text-primary);
}

.callout-warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: var(--text-primary);
}

.callout-source {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-left: 5px solid var(--accent-primary);
  font-size: 0.9rem;
}

.callout-title {
  font-weight: 800;
  font-size: 1.08rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   CALCULATOR SYSTEM
   ========================================================================== */
.calculator-box {
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  box-shadow: var(--shadow-lg);
  margin: 2.5rem 0;
}

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

@media (max-width: 840px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 1.35rem;
}

.form-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-base);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.96rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
  outline: none;
}

.calc-output-box {
  background-color: var(--bg-base);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.calc-output-value {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent-primary);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  margin: 0.5rem 0;
}

.calc-output-unit {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}

/* ==========================================================================
   TABLES & DATA MATRICES
   ========================================================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 1.75rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.data-table, table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

th {
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 700;
  padding: 0.95rem 1.15rem;
  border-bottom: 2px solid var(--border-strong);
}

td {
  padding: 0.95rem 1.15rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

tr:hover td {
  background: rgba(245, 158, 11, 0.04);
}

/* ==========================================================================
   FAQ ACCORDION COMPONENT (PERFECTLY CENTERED & BALANCED)
   ========================================================================== */
.faq-section {
  max-width: 920px;
  margin: 4.5rem auto;
  padding: 0 1.5rem;
  width: 100%;
  box-sizing: border-box;
}

.faq-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.faq-item:hover, .faq-item[open] {
  border-color: var(--border-accent);
}

.faq-question, summary {
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.15s;
}

.faq-question:hover, summary:hover {
  color: var(--accent-primary);
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--accent-primary);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

details[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer, details p {
  padding: 0 1.5rem 1.35rem;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.72;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

/* ==========================================================================
   ULTRA-PREMIUM FOOTER (FIXED & COMPLETE)
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 960px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 540px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-col-title {
  color: var(--text-primary);
  font-size: 0.96rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
}

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

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  transition: all 0.15s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--accent-primary);
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-secondary);
  text-decoration: underline;
  transition: color 0.15s;
}

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

/* ==========================================================================
   BREADCRUMBS
   ========================================================================== */
.breadcrumb-trail, .breadcrumbs {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

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

.breadcrumb-trail li:not(:last-child)::after, .breadcrumbs li:not(:last-child)::after {
  content: "›";
  margin-left: 0.5rem;
  color: var(--border-strong);
  font-weight: 700;
}

.breadcrumb-trail a, .breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.breadcrumb-trail a:hover, .breadcrumbs a:hover {
  color: var(--accent-primary);
}

/* ==========================================================================
   RESPONSIVENESS & MOBILE NAVIGATION
   ========================================================================== */
@media (max-width: 920px) {
  .site-header {
    position: sticky;
    top: 0;
  }

  .nav-wrapper,
  .nav-container {
    height: 4.25rem;
    padding: 0 1rem;
    gap: 0.75rem;
  }

  .brand-badge {
    display: none;
  }

  .brand-logo {
    font-size: 1.05rem;
    gap: 0.5rem;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 2px solid var(--border-accent);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.75);
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem 1.5rem;
    gap: 0.5rem;
    z-index: 1001;
  }

  .nav-menu.nav-menu-open {
    display: flex !important;
    animation: navSlideDown 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }

  @keyframes navSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .nav-link {
    padding: 0.85rem 1.25rem;
    font-size: 1.02rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
  }

  .nav-link:hover,
  .nav-link.active {
    border-color: var(--border-accent);
    color: var(--accent-primary);
    background: rgba(245, 158, 11, 0.08);
  }

  .hero-title {
    font-size: 2.2rem;
  }
}

@media (max-width: 520px) {
  .nav-plan-btn {
    display: none;
  }
  .brand-text {
    font-size: 0.95rem;
  }
}

/* Checklist Builder Interactive Enhancements */
.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.9rem 1.15rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

.checklist-item:hover {
  border-color: var(--border-accent);
  transform: translateX(2px);
}

.checklist-item.item-completed {
  background: rgba(16, 185, 129, 0.05);
  border-color: rgba(16, 185, 129, 0.3);
}

.checklist-item input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.2rem;
  accent-color: var(--accent-primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* Print Styles for Offline Disaster Use */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }
  .site-header, .site-footer, .theme-toggle-btn, .mobile-menu-btn, .btn, .disclosure-banner, #chkSelectAllBtn, #chkClearAllBtn, #chkExportJsonBtn {
    display: none !important;
  }
  .checklist-item {
    background: transparent !important;
    border: 1px solid #ccc !important;
    color: #000 !important;
    page-break-inside: avoid;
    margin-bottom: 0.5rem !important;
  }
  .checklist-item strong, .checklist-item span {
    color: #000 !important;
    opacity: 1 !important;
  }
  #checklistSummaryMetrics > div {
    background: #f8fafc !important;
    border: 1px solid #000 !important;
    color: #000 !important;
  }
  #checklistSummaryMetrics strong, #checklistSummaryMetrics span {
    color: #000 !important;
  }
  .container {
    max-width: 100% !important;
    padding: 0 !important;
  }
  .card, .calculator-box, .direct-answer-card {
    border: 1px solid #cccccc !important;
    background: transparent !important;
    box-shadow: none !important;
    page-break-inside: avoid;
  }
}

.pyramid-container {
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.pyramid-container svg {
  width: 100%;
  max-width: 800px;
  height: auto;
  display: block;
  border-radius: 8px;
}

/* ==========================================================================
   TIERED READINESS STANDARD COMPONENT (RESPONSIVE & ZERO-OVERFLOW)
   ========================================================================== */
.readiness-standard-card {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 2.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  box-sizing: border-box;
}

.standard-header {
  text-align: left;
  margin-bottom: 2rem;
}

.standard-title {
  font-size: 1.45rem;
  font-weight: 850;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.standard-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.tiers-stack {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.tier-row {
  display: flex;
  align-items: stretch;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

.tier-row:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.tier-row-highlight {
  border-color: rgba(245, 158, 11, 0.4);
}

.tier-row-highlight:hover {
  border-color: var(--accent-primary);
}

.tier-badge {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-width: 140px;
  width: 140px;
  padding: 1.25rem 1rem;
  background: rgba(15, 23, 42, 0.9);
  border-right: 1px solid var(--border-subtle);
  box-sizing: border-box;
  flex-shrink: 0;
}

.tier-tag {
  font-size: 0.85rem;
  font-weight: 850;
  color: var(--accent-primary);
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.tier-time {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.tier-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.15rem 1.5rem;
  flex: 1;
  min-width: 0; /* prevents flex child overflow */
  box-sizing: border-box;
}

.tier-info-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
  line-height: 1.4;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.tier-row-highlight .tier-info-title {
  color: var(--accent-primary);
}

.tier-info-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 0.45rem;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.tier-info-meta {
  font-size: 0.82rem;
  font-weight: 600;
  color: #10b981;
  line-height: 1.4;
}

.meta-divider {
  color: var(--border-strong);
  margin: 0 0.4rem;
}

/* Universal Anti-Overflow Protections */
*, *::before, *::after {
  box-sizing: border-box;
}

body, html {
  overflow-x: hidden;
  max-width: 100vw;
}

.container {
  width: 100%;
  max-width: 1200px;
  box-sizing: border-box;
}

.card, .form-group, .hero-card, .disclosure-banner {
  box-sizing: border-box;
  min-width: 0;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

@media (max-width: 768px) {
  .readiness-standard-card {
    padding: 1.25rem 1rem;
  }
  .tier-row {
    flex-direction: column;
  }
  .tier-badge {
    width: 100%;
    min-width: 100%;
    flex-direction: row;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
  .tier-info {
    padding: 1rem;
  }
}


/* Bulletproof Brand Icon Sizing */
.brand-icon,
svg.brand-icon {
  width: 24px !important;
  height: 24px !important;
  min-width: 24px !important;
  min-height: 24px !important;
  max-width: 24px !important;
  max-height: 24px !important;
  color: var(--accent-primary);
  flex-shrink: 0 !important;
  display: inline-block !important;
  vertical-align: middle !important;
  transition: transform 0.2s ease;
}

.site-footer .brand-logo {
  display: inline-flex !important;
  align-items: center !important;
  gap: 0.65rem !important;
  text-decoration: none !important;
  margin-bottom: 1rem !important;
}

.site-footer .brand-icon,
.site-footer svg.brand-icon,
.site-footer .brand-logo svg {
  width: 22px !important;
  height: 22px !important;
  min-width: 22px !important;
  min-height: 22px !important;
  max-width: 22px !important;
  max-height: 22px !important;
  color: var(--accent-primary) !important;
  flex-shrink: 0 !important;
  display: inline-block !important;
  vertical-align: middle !important;
}

.site-footer .brand-text {
  font-size: 1.1rem !important;
  font-weight: 800 !important;
  color: var(--text-primary) !important;
  letter-spacing: -0.01em !important;
  line-height: 1 !important;
}