/* ==========================================================================
   BulkVAT — Design System & Semantic Theme Stylesheet
   Brand Archetype: The Sage (Calm, Precise, Authoritative, Plain)
   Accessibility: WCAG AA/AAA Compliant Contrast, Focus Indicators
   ========================================================================== */

:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Surfaces & Canvas */
  --bg-page: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-surface-subtle: #F1F5F9;
  --bg-surface-elevated: #FFFFFF;
  --bg-surface-dark: #0F172A;
  --bg-surface-dark-subtle: #1E293B;

  /* Borders & Dividers */
  --border-subtle: #E2E8F0;
  --border-medium: #CBD5E1;
  --border-focus: #2563EB;

  /* Text & Content (WCAG AA/AAA Guaranteed) */
  --text-primary: #0F172A;       /* Contrast > 14:1 on white */
  --text-secondary: #334155;     /* Contrast > 7:1 on white */
  --text-muted: #64748B;         /* Contrast > 4.6:1 on white */
  --text-inverse: #FFFFFF;
  --text-inverse-muted: #94A3B8;

  /* Accent (Primary Brand Blue) */
  --accent-primary: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-active: #1E40AF;
  --accent-subtle: #EFF6FF;
  --accent-border: #BFDBFE;

  /* Functional Status Colors */
  --success-text: #166534;
  --success-bg: #DCFCE7;
  --success-border: #86EFAC;

  --warning-text: #9A3412;
  --warning-bg: #FFEDD5;
  --warning-border: #FDBA74;

  --danger-text: #991B1B;
  --danger-bg: #FEE2E2;
  --danger-border: #FCA5A5;

  /* Spacing Grid (4px/8px) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Elevation */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);

  /* Micro-interactions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;

  /* Container */
  --container-max-width: 1140px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  min-width: 0;
  background-color: var(--bg-page);
  background-image: 
    radial-gradient(ellipse 80% 35% at 50% -5%, rgba(37, 99, 235, 0.08), transparent 70%),
    radial-gradient(ellipse 40% 25% at 95% 10%, rgba(14, 165, 233, 0.04), transparent 60%);
  background-repeat: no-repeat;
}

/* Headings & Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

/* Layout Shell: Unified Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  min-width: 0;
}

.site-main {
  flex: 1 0 auto;
  padding-bottom: var(--space-16);
}

/* Layout Shell: Single Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-base);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-4);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
  color: #FFFFFF;
  border-radius: 10px;
  box-shadow: 0 4px 10px -2px rgba(37, 99, 235, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* Navigation Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-link {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom-color: var(--border-medium);
}

.nav-link.active {
  color: var(--accent-primary);
  font-weight: 600;
  border-bottom-color: var(--accent-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 20px;
  font-size: 0.93rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(180deg, #2563EB 0%, #1D4ED8 100%);
  color: #FFFFFF;
  border: 1px solid #1D4ED8;
  box-shadow: 0 1px 3px 0 rgba(37, 99, 235, 0.2), inset 0 1px 0 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #1D4ED8 0%, #1E40AF 100%);
  color: #FFFFFF;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.35), inset 0 1px 0 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:active {
  background: #1E40AF;
  transform: translateY(0);
  box-shadow: 0 1px 2px 0 rgba(37, 99, 235, 0.2);
}

.btn-secondary {
  background: #FFFFFF;
  color: #0F172A;
  border: 1px solid #CBD5E1;
  box-shadow: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
}

.btn-secondary:hover {
  background: #F8FAFC;
  border-color: #94A3B8;
  color: #0F172A;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px -2px rgba(15, 23, 42, 0.08);
}

.btn-secondary:active {
  background: #F1F5F9;
  transform: translateY(0);
}

.btn-lg {
  padding: 13px 26px;
  font-size: 1.02rem;
  font-weight: 600;
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: var(--space-16) 0 var(--space-12) 0;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--space-6);
}

.hero-title {
  max-width: 900px;
  margin: 0 auto var(--space-6) auto;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.8vw, 3.6rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.035em;
  color: var(--text-primary);
}

.gradient-text {
  background: linear-gradient(135deg, #1D4ED8 0%, #2563EB 50%, #0F172A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 720px;
  margin: 0 auto var(--space-8) auto;
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.hero-proof {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}

.proof-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.proof-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #DCFCE7;
  color: #166534;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  flex-shrink: 0;
}

/* Authority Trust Strip */
.trust-strip {
  margin: var(--space-12) auto 0 auto;
  padding-top: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  max-width: 1120px;
}

.trust-strip-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  align-items: center;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.trust-badge:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.trust-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
}

/* Cards & Grids */
.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  min-width: 0;
}

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

.card-header {
  margin-bottom: var(--space-4);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
}

.card:hover .card-icon {
  background-color: var(--accent-primary);
  color: #FFFFFF;
  border-color: var(--accent-primary);
  transform: scale(1.05);
}

.card-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Section Shell */
.section {
  padding: var(--space-12) 0;
}

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-10) auto;
}

.section-title {
  margin-bottom: var(--space-3);
}

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

/* Comparison & Pricing Table */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-sm);
  margin: var(--space-6) 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.93rem;
  min-width: 600px;
}

.data-table th, .data-table td {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

.data-table th {
  background-color: var(--bg-surface-subtle);
  font-weight: 600;
  color: var(--text-primary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: rgba(248, 250, 252, 0.8);
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.badge-success {
  background-color: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
}

.badge-warning {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
}

.badge-danger {
  background-color: var(--danger-bg);
  color: var(--danger-text);
  border: 1px solid var(--danger-border);
}

.badge-info {
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--accent-border);
}

/* Callout / Notice Box */
.notice-box {
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-8);
  font-size: 0.93rem;
  line-height: 1.5;
}

.notice-warning {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
}

.notice-info {
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--accent-border);
}

/* Legal & Longform Content */
.prose {
  max-width: 840px;
  margin: 0 auto;
}

.prose h1 { margin-bottom: var(--space-4); }
.prose h2 { margin: var(--space-8) 0 var(--space-3) 0; }
.prose h3 { margin: var(--space-6) 0 var(--space-2) 0; }
.prose p { margin-bottom: var(--space-4); }
.prose ul, .prose ol {
  margin: 0 0 var(--space-4) var(--space-6);
  color: var(--text-secondary);
}
.prose li { margin-bottom: var(--space-2); }
.prose strong { color: var(--text-primary); }

.legal-meta {
  display: flex;
  gap: var(--space-6);
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-5) var(--space-6);
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
}

.faq-question:hover {
  background-color: var(--bg-surface-subtle);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.faq-answer {
  padding: 0 var(--space-6) var(--space-6) var(--space-6);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Pricing Card Component */
.pricing-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-8);
  box-shadow: var(--shadow-lg);
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-primary);
  color: var(--text-inverse);
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pricing-price {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin: var(--space-4) 0 var(--space-1) 0;
}

.pricing-type {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin: var(--space-6) 0 var(--space-8) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.check-mark {
  color: var(--accent-primary);
  font-weight: 700;
}

/* Layout Shell: Single Footer */
.site-footer {
  background-color: var(--bg-surface-dark);
  color: var(--text-inverse-muted);
  padding: var(--space-16) 0 var(--space-8) 0;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-col h4 {
  color: var(--text-inverse);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  color: var(--text-inverse-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-brand-desc {
  color: var(--text-inverse-muted);
  margin-top: var(--space-3);
  font-size: 0.9rem;
  max-width: 320px;
  line-height: 1.6;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--bg-surface-dark-subtle);
  font-size: 0.8rem;
  color: var(--text-inverse-muted);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: center;
}

/* Interactive Live Sandbox Widget */
.sandbox-card {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.07), 0 0 0 1px rgba(15, 23, 42, 0.04);
  margin: var(--space-8) auto;
  max-width: 920px;
  text-align: left;
  position: relative;
}

.diss-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  margin-left: 4px;
  font-weight: 600;
}

.diss-prefix {
  background: #EFF6FF;
  color: #1E40AF;
  border: 1px solid #BFDBFE;
}

.diss-core {
  background: #F1F5F9;
  color: #334155;
  border: 1px solid #CBD5E1;
}

.diss-check {
  background: #F0FDF4;
  color: #166534;
  border: 1px solid #BBF7D0;
}

.diss-check.diss-invalid {
  background: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

.sandbox-header {
  margin-bottom: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sandbox-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: #15803D;
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.live-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #16A34A;
  box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.6);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(22, 163, 74, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); }
}

.sandbox-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.sandbox-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Integrated Diagnostic Input */
.sandbox-input-wrapper {
  position: relative;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
}

.sandbox-search-icon {
  position: absolute;
  left: 14px;
  color: #94A3B8;
  pointer-events: none;
  display: flex;
  align-items: center;
}

.sandbox-input {
  width: 100%;
  padding: 13px 180px 13px 44px;
  font-size: 1.15rem;
  font-family: var(--font-mono);
  font-weight: 600;
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
}

.sandbox-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.sandbox-input-badge {
  position: absolute;
  right: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  pointer-events: none;
}

/* Presets Strip */
.sandbox-presets-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-5);
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: none;
}

.sandbox-presets-bar::-webkit-scrollbar {
  display: none;
}

.preset-chip {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.preset-chip:hover {
  background: var(--accent-subtle);
  border-color: var(--accent-border);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

/* Executive Verification Ledger */
.sandbox-ledger {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  overflow: hidden;
}

.ledger-header {
  padding: 12px 18px;
  background: #F8FAFC;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.ledger-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 700;
}

.ledger-badge {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.ledger-body {
  padding: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 640px) {
  .ledger-body {
    grid-template-columns: 1fr;
  }
}

.ledger-col-title {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 10px;
  border-bottom: 1px solid #F1F5F9;
  padding-bottom: 4px;
}

.ledger-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid #F8FAFC;
  font-size: 0.86rem;
}

.ledger-row:last-child {
  border-bottom: none;
}

.ledger-label {
  color: var(--text-secondary);
}

.ledger-val {
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.ledger-footer {
  padding: 10px 18px;
  background: #F8FAFC;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: #475569;
  line-height: 1.45;
}

/* High-Fidelity Google Sheets Mockup Frame */
.sheets-mockup-wrapper {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 30px -6px rgba(15, 23, 42, 0.1), 0 8px 12px -4px rgba(15, 23, 42, 0.06);
  overflow: hidden;
  margin: var(--space-10) auto;
  max-width: 1080px;
  text-align: left;
}

.mockup-window-bar {
  background: #F1F5F9;
  border-bottom: 1px solid #E2E8F0;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot-red { background: #EF4444; }
.dot-yellow { background: #F59E0B; }
.dot-green { background: #10B981; }

.mockup-sheet-title {
  font-size: 13px;
  font-weight: 600;
  color: #334155;
  display: flex;
  align-items: center;
  gap: 6px;
}

.mockup-sheets-icon {
  width: 18px;
  height: 18px;
  background: #0F9D58;
  color: #FFF;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.mockup-menubar {
  background: #FFFFFF;
  border-bottom: 1px solid #E2E8F0;
  padding: 4px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11.5px;
  color: #475569;
  overflow-x: auto;
}

.mockup-menu-item {
  cursor: default;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.mockup-menu-item:hover {
  background: #F1F5F9;
  color: #0F172A;
}

.mockup-menu-item.active-menu {
  color: #2563EB;
  font-weight: 600;
  background: #EFF6FF;
}

.mockup-formula-bar {
  background: #FFFFFF;
  border-bottom: 1px solid #CBD5E1;
  padding: 5px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
}

.formula-cell-ref {
  font-weight: 600;
  color: #475569;
  font-family: var(--font-mono);
  font-size: 11px;
  min-width: 32px;
  border-right: 1px solid #E2E8F0;
  padding-right: 8px;
}

.formula-fx {
  font-weight: 700;
  font-style: italic;
  color: #94A3B8;
  font-size: 12px;
  user-select: none;
}

.formula-input {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: #0F172A;
  flex: 1;
}

.mockup-bottom-bar {
  background: #F8FAFC;
  border-top: 1px solid #E2E8F0;
  padding: 4px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
}

.sheet-tab {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  border-bottom: 2px solid #0F9D58;
  padding: 4px 14px;
  border-radius: 4px 4px 0 0;
  font-weight: 600;
  color: #0F172A;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.mockup-body {
  display: flex;
  min-height: 360px;
}

.mockup-grid-pane {
  flex: 1;
  overflow: hidden;
  border-right: 1px solid #E2E8F0;
  background: #FFFFFF;
}

.mockup-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  font-size: 12px;
}

.mockup-table th {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 8px 10px;
  font-weight: 600;
  color: #475569;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mockup-table td {
  border: 1px solid #E2E8F0;
  padding: 8px 10px;
  color: #1E293B;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cell-valid {
  background: #E6F4EA !important;
  color: #137333 !important;
  font-weight: 600;
}

.cell-invalid {
  background: #FCE8E6 !important;
  color: #C5221F !important;
  font-weight: 600;
}

.cell-info {
  background: #EFF6FF !important;
  color: #1E40AF !important;
  font-weight: 600;
}

.mockup-sidebar-pane {
  width: 290px;
  background: #F8FAFC;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #E2E8F0;
  padding-bottom: 10px;
}

.sidebar-progress-box {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 12px;
}

.progress-bar-bg {
  height: 6px;
  background: #E2E8F0;
  border-radius: 3px;
  overflow: hidden;
  margin: 8px 0;
}

.progress-bar-inner {
  width: 100%;
  height: 100%;
  background: #2563EB;
}

.sidebar-stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 8px;
}

.sidebar-stat-chip {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 4px;
  padding: 6px;
  text-align: center;
}

/* Persona Section Cards */
.persona-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all var(--transition-base);
}

.persona-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.persona-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
  align-self: flex-start;
}

.persona-pain {
  font-size: 0.95rem;
  color: var(--danger-text);
  background: var(--danger-bg);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  line-height: 1.4;
  border-left: 3px solid var(--danger-border);
}

.persona-solution {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: auto;
}

/* Country Directory Live Filter Bar */
.filter-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin: var(--space-6) 0 var(--space-4) 0;
  flex-wrap: wrap;
}

.filter-input-wrap {
  flex: 1;
  min-width: 260px;
  position: relative;
}

.filter-input {
  width: 100%;
  padding: 10px 14px 10px 38px;
  font-size: 0.95rem;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  outline: none;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.filter-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.filter-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

.filter-counter {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}


/* Responsive Media Queries */
@media (max-width: 900px) {
  .card-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: var(--bg-surface);
    flex-direction: column;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-md);
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .card-grid-3, .card-grid-2 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .btn {
    width: 100%;
  }
}

/* Print Styles */
@media print {
  .site-header, .site-footer, .btn, .hero-cta-group {
    display: none !important;
  }
  body {
    background: #FFFFFF !important;
    color: #000000 !important;
  }
  .container {
    max-width: 100% !important;
    padding: 0 !important;
  }
}