/* ==========================================================================
   AlphaTunnel Labs — Tailored Financial Dark Mode Design System
   WCAG 2.1 AA Compliant & Bullion-Grade Aesthetics
   ========================================================================== */

:root {
  /* Color Palette (Tailored HSL) */
  --bg-base: hsl(222, 47%, 9%);        /* #0c121e Deep midnight navy */
  --bg-surface: hsl(222, 40%, 13%);     /* #141d2d Elevated panel */
  --bg-card: hsla(222, 35%, 17%, 0.7);  /* Glassmorphic card fill */
  --bg-card-hover: hsla(222, 35%, 22%, 0.85);

  --border-subtle: hsla(222, 25%, 30%, 0.4);
  --border-card: hsla(215, 30%, 35%, 0.35);
  --border-glow: hsla(187, 92%, 55%, 0.5);

  /* High-Contrast Accent Tokens (WCAG AA compliant against dark base) */
  --accent-cyan: hsl(187, 92%, 55%);      /* #22d3ee Electric cyan (8.4:1 contrast) */
  --accent-cyan-hover: hsl(187, 92%, 65%);
  --accent-amber: hsl(38, 92%, 55%);      /* #f59e0b Warning / Shakeout */
  --accent-danger: hsl(348, 86%, 61%);    /* #f43f5e Drawdown / Risk */
  --accent-success: hsl(142, 71%, 50%);   /* #22c55e Resilience / Growth */

  /* Text Tokens */
  --text-primary: hsl(210, 40%, 98%);     /* #f8fafc Crisp white (14.2:1 contrast) */
  --text-secondary: hsl(215, 20%, 75%);   /* #cbd5e1 Subhead / labels */
  --text-muted: hsl(215, 16%, 58%);       /* #94a3b8 Hints / captions */

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout & Spacing */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  /* Focus Ring */
  --focus-ring: 2px solid var(--accent-cyan);
  --focus-offset: 3px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Screen Reader Only Utility (a11y) */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Skip Link for Keyboard Navigation (WCAG 2.1 AA) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--accent-cyan);
  color: hsl(222, 47%, 9%);
  padding: 12px 20px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top var(--transition-fast);
  text-decoration: none;
}
.skip-link:focus {
  top: 20px;
  outline: 3px solid #fff;
}

/* Keyboard Focus Rings */
:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* Numbers: Tabular Alignment for Financial Precision */
.tabular-nums, .data-table, .metric-value, .kpi-value {
  font-variant-numeric: tabular-nums;
}

/* --- Navigation Bar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: hsla(222, 47%, 9%, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 24px;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-logo {
  color: var(--accent-cyan);
  font-size: 1.4rem;
  animation: pulse-slow 3s infinite ease-in-out;
}

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

.brand-badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: hsla(187, 92%, 55%, 0.15);
  color: var(--accent-cyan);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glow);
  font-weight: 600;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-item {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-item:hover {
  color: var(--text-primary);
  background: hsla(222, 35%, 20%, 0.5);
}

.nav-item.active {
  color: var(--accent-cyan);
  background: hsla(187, 92%, 55%, 0.12);
  font-weight: 600;
}

.nav-admin-only {
  border: 1px solid hsla(38, 92%, 55%, 0.4);
  color: var(--accent-amber);
}
.nav-admin-only:hover {
  background: hsla(38, 92%, 55%, 0.15);
  color: #fff;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Engine Pulse Indicator */
.engine-pulse {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: hsla(142, 71%, 50%, 0.1);
  border: 1px solid hsla(142, 71%, 50%, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--accent-success);
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-success);
  box-shadow: 0 0 8px var(--accent-success);
  animation: pulse-dot 2s infinite ease-in-out;
}

/* User Pill & Tier Tag */
.user-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-surface);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-card);
  font-size: 0.85rem;
}

.tier-tag {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--accent-cyan);
  color: var(--bg-base);
  font-weight: 700;
  text-transform: uppercase;
}

.tier-tag.founder {
  background: var(--accent-amber);
  color: var(--bg-base);
}

.tier-tag.expert {
  background: #a855f7;
  color: #ffffff;
}

.tier-tag.prosumer {
  background: var(--accent-cyan);
  color: var(--bg-base);
}

.tier-tag.free {
  background: var(--text-muted);
  color: var(--bg-base);
}

/* --- Layout & View Container --- */
main {
  flex: 1;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px 64px 24px;
}

.app-view {
  display: none;
}

.app-view.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

/* --- Hero Section --- */
.hero-section {
  text-align: center;
  padding: 48px 0 36px 0;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: hsla(215, 30%, 25%, 0.4);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-headline {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #38bdf8 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subhead {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Cards & Glassmorphism --- */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px hsla(0, 0%, 0%, 0.3);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- Teaser Visualizer & Workspace Grid --- */
.teaser-section {
  margin: 32px 0 64px 0;
}

.scenario-selector-group {
  display: flex;
  gap: 8px;
  background: hsla(222, 47%, 9%, 0.6);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.scenario-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.scenario-btn:hover {
  color: var(--text-primary);
}

.scenario-btn.active {
  background: var(--accent-cyan);
  color: var(--bg-base);
}

.teaser-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 24px;
  align-items: center;
}

.chart-container {
  background: hsla(222, 47%, 7%, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas {
  width: 100% !important;
  max-width: 100%;
  height: auto !important;
  display: block;
}

.teaser-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.metric-card, .kpi-card {
  background: hsla(222, 40%, 15%, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.metric-label, .kpi-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-value, .kpi-value {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 6px 0;
  letter-spacing: -0.02em;
}

.metric-hint, .kpi-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.text-danger { color: var(--accent-danger); }
.text-amber { color: var(--accent-amber); }
.text-cyan { color: var(--accent-cyan); }
.text-success { color: var(--accent-success); }

/* --- Accessible Data Table Toggle (a11y) --- */
.a11y-toggle-wrap {
  margin-top: 18px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

.accessible-table-container {
  margin-top: 14px;
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table caption {
  text-align: left;
  font-weight: 600;
  padding: 10px 16px;
  background: hsla(222, 47%, 9%, 0.9);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.data-table th, .data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table th {
  background: hsla(222, 47%, 10%, 0.8);
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table tbody tr:hover {
  background: hsla(222, 35%, 22%, 0.4);
}

/* --- Features Grid (4 Pillars) --- */
.features-section {
  padding: 48px 0;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section-subhead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.text-center { text-align: center; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
}

.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Pricing Grid --- */
.pricing-section {
  padding: 48px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
}

.highlight-card {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 30px hsla(187, 92%, 55%, 0.15);
}

.popular-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent-cyan);
  color: var(--bg-base);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.popular-badge.expert-badge {
  background: #a855f7;
  color: #ffffff;
}

.tier-name {
  font-size: 1.4rem;
  font-weight: 700;
}

.tier-price {
  font-size: 2.8rem;
  font-weight: 800;
  margin: 12px 0 20px 0;
}

.price-period {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 400;
}

.tier-features {
  list-style: none;
  margin-bottom: 32px;
  flex: 1;
}

.tier-features li {
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.tier-features li::before {
  content: "✓";
  color: var(--accent-cyan);
  font-weight: 800;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 12px 24px;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: all var(--transition-fast);
  min-height: 44px; /* WCAG touch target */
}

.btn-primary {
  background: var(--accent-cyan);
  color: var(--bg-base);
}
.btn-primary:hover {
  background: var(--accent-cyan-hover);
  box-shadow: 0 0 16px hsla(187, 92%, 55%, 0.4);
}

.btn-secondary {
  background: hsla(215, 25%, 25%, 0.6);
  color: var(--text-primary);
  border-color: var(--border-card);
}
.btn-secondary:hover {
  background: hsla(215, 25%, 35%, 0.8);
  border-color: var(--text-secondary);
}

.btn-glass {
  background: hsla(222, 35%, 20%, 0.4);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
  border-color: var(--border-card);
}
.btn-glass:hover {
  background: hsla(222, 35%, 30%, 0.7);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
  min-height: 36px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.1rem;
}

.btn-full {
  width: 100%;
}

.btn-text-link {
  background: transparent;
  border: none;
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  text-decoration: underline;
  min-height: 36px;
}
.btn-text-link:hover {
  color: var(--accent-cyan-hover);
}

/* --- Forms & Inputs --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select {
  background: hsla(222, 47%, 7%, 0.8);
  border: 1px solid var(--border-card);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
  min-height: 44px;
}

.form-input:focus, .form-select:focus {
  border-color: var(--accent-cyan);
}

/* --- Wind Tunnel Workspace Layout --- */
.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.view-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.view-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.quota-pill {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
}

.quota-value {
  color: var(--accent-cyan);
  margin-left: 6px;
}

.windtunnel-workspace {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.basket-input-row {
  display: grid;
  grid-template-columns: 1.5fr 1.5fr 1fr;
  gap: 12px;
  align-items: flex-end;
  margin-bottom: 16px;
}

.basket-table-container {
  min-height: 140px;
  max-height: 520px;
  overflow-y: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  scrollbar-width: thin;
  scrollbar-color: hsla(217, 91%, 60%, 0.6) hsla(222, 47%, 10%, 0.8);
}

.basket-table-container::-webkit-scrollbar {
  width: 6px;
}

.basket-table-container::-webkit-scrollbar-track {
  background: hsla(222, 47%, 10%, 0.8);
  border-radius: 4px;
}

.basket-table-container::-webkit-scrollbar-thumb {
  background: hsla(217, 91%, 60%, 0.6);
  border-radius: 4px;
}

.basket-table-container::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.row-just-added {
  animation: rowHighlight 1.5s ease-out;
}

@keyframes rowHighlight {
  0% {
    background-color: hsla(142, 71%, 50%, 0.25);
  }
  100% {
    background-color: transparent;
  }
}

.basket-summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-top: 1px solid var(--border-subtle);
}

.controls-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

/* --- Results Panel --- */
.results-panel {
  margin-top: 32px;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 16px;
}

.risk-badge {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.risk-badge.RESILIENT {
  background: hsla(142, 71%, 50%, 0.15);
  border: 1px solid var(--accent-success);
  color: var(--accent-success);
}
.risk-badge.ELEVATED_RISK {
  background: hsla(38, 92%, 55%, 0.15);
  border: 1px solid var(--accent-amber);
  color: var(--accent-amber);
}
.risk-badge.HIGH_RISK {
  background: hsla(348, 86%, 61%, 0.15);
  border: 1px solid var(--accent-danger);
  color: var(--accent-danger);
}

.results-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

/* --- Dominic's Admin Mission Control --- */
.admin-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.badge-founder {
  background: hsla(38, 92%, 55%, 0.15);
  border: 1px solid var(--accent-amber);
  color: var(--accent-amber);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.85rem;
}

.admin-section-card {
  margin-bottom: 28px;
}

.table-container {
  overflow-x: auto;
}

/* --- Modals & Popups --- */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: hsla(222, 47%, 5%, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
}

.modal-card {
  width: 100%;
  max-width: 440px;
  position: relative;
  box-shadow: 0 16px 48px hsla(0, 0%, 0%, 0.6);
  border: 1px solid var(--border-glow);
}

.btn-close-modal {
  position: absolute;
  top: 18px;
  right: 18px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 6px;
}
.btn-close-modal:hover { color: var(--text-primary); }

.modal-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.modal-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.btn-google {
  background: #ffffff;
  color: #1f2937;
  border-radius: var(--radius-md);
  font-weight: 600;
  box-shadow: 0 2px 4px hsla(0, 0%, 0%, 0.2);
}
.btn-google:hover {
  background: #f1f5f9;
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 18px 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-subtle);
}
.divider span {
  padding: 0 10px;
}

/* Password Rules Box (a11y) */
.password-rules-box {
  background: hsla(222, 47%, 7%, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 0.8rem;
}

.rules-heading {
  font-weight: 600;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 6px;
}

.rules-list {
  list-style: none;
}

.rule-item {
  color: var(--text-muted);
  padding: 2px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.rule-item::before {
  content: "○";
  color: var(--text-muted);
}
.rule-item[aria-invalid="false"] {
  color: var(--accent-success);
}
.rule-item[aria-invalid="false"]::before {
  content: "●";
  color: var(--accent-success);
}

.modal-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

/* TOTP Setup Box (a11y for blind/low vision) */
.totp-setup-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.qr-placeholder {
  width: 160px;
  height: 160px;
  background: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #111827;
  font-weight: 700;
  font-size: 0.9rem;
}

.accessible-mfa-copy-box {
  width: 100%;
  background: hsla(222, 47%, 7%, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}

.mfa-copy-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.copy-field {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.secret-key {
  font-family: var(--font-mono);
  background: hsla(222, 47%, 12%, 0.9);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-weight: 700;
  letter-spacing: 0.1em;
}

.totp-input {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  letter-spacing: 0.3em;
  font-weight: 700;
}

/* --- Footer --- */
.app-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 24px 32px 24px;
  margin-top: auto;
}

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

.footer-brand {
  margin-bottom: 20px;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
}
.footer-link:hover { color: var(--accent-cyan); }

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- Utilities & Animation --- */
.hidden { display: none !important; }

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

@keyframes pulse-slow {
  0%, 100% { opacity: 0.9; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.08); }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* --- Reduced Motion for Vestibular Safety (a11y) --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- Mobile Hamburger Toggle Button --- */
.btn-mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger-bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.btn-mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.btn-mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}
.btn-mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Responsive Media Queries (Desktop, Tablet, Mobile) --- */
@media (max-width: 900px) {
  .hero-headline { font-size: 2.4rem; }
  .teaser-grid, .windtunnel-workspace { grid-template-columns: 1fr; }
  .basket-input-row { grid-template-columns: 1fr 1fr; }
  .btn-add { grid-column: span 2; }
  .admin-kpi-grid, .results-kpi-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .btn-mobile-toggle { display: flex; }
  .engine-pulse { display: none; }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: hsla(222, 47%, 9%, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-glow);
    box-shadow: 0 16px 32px hsla(0, 0%, 0%, 0.5);
    gap: 12px;
  }

  .nav-menu.mobile-open {
    display: flex;
    animation: fadeIn 0.2s ease-out;
  }

  .nav-item {
    padding: 12px 16px;
    font-size: 1.05rem;
  }

  .hero-headline { font-size: 2rem; }
  .teaser-metrics { grid-template-columns: 1fr; }
  .basket-input-row { grid-template-columns: 1fr; }
  .btn-add { grid-column: span 1; }
  .admin-kpi-grid, .results-kpi-grid { grid-template-columns: 1fr; }
}

/* --- PWA Standalone Mode (iOS Safe Area Padding) --- */
@media all and (display-mode: standalone) {
  .navbar {
    padding-top: max(12px, env(safe-area-inset-top));
  }
  .app-footer {
    padding-bottom: max(32px, env(safe-area-inset-bottom));
  }
}

/* --- Billing Toasts & Live Notifications --- */
.billing-toast-container {
  position: fixed;
  top: 84px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}

.billing-toast {
  pointer-events: auto;
  min-width: 320px;
  max-width: 480px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  box-shadow: 0 12px 36px hsla(0, 0%, 0%, 0.6);
  animation: slideInRight 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid var(--border-subtle);
  background: hsla(222, 47%, 12%, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: var(--text-primary);
}

.billing-toast.success {
  border-color: var(--accent-green);
  background: hsla(158, 64%, 10%, 0.95);
  color: #a7f3d0;
}

.billing-toast.error {
  border-color: var(--accent-red);
  background: hsla(0, 72%, 10%, 0.95);
  color: #fecaca;
}

.billing-toast.info {
  border-color: var(--accent-cyan);
  background: hsla(187, 85%, 10%, 0.95);
  color: #bae6fd;
}

.toast-close-btn {
  background: transparent;
  border: none;
  color: inherit;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 4px;
  opacity: 0.7;
}
.toast-close-btn:hover {
  opacity: 1.0;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* --- Hero Trust Bar --- */
.hero-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px 28px;
  margin-top: 40px;
  padding: 14px 24px;
  background: hsla(222, 35%, 15%, 0.5);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trust-icon {
  font-size: 1rem;
}

/* --- Section Badges & Typography --- */
.section-badge-center {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}

.badge-pill {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: hsla(187, 92%, 55%, 0.1);
  border: 1px solid hsla(187, 92%, 55%, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

/* --- How It Works Section --- */
.how-section {
  padding: 54px 0 24px 0;
}

.how-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 36px;
}

.how-step-card {
  position: relative;
  padding: 32px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-smooth);
}

.how-step-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: 0 12px 32px hsla(187, 92%, 55%, 0.12);
}

.how-step-num {
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 800;
  color: hsla(215, 30%, 35%, 0.4);
}

.how-step-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.how-step-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.how-step-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Quantitative Labs Product Suite --- */
.suite-section {
  padding: 64px 0 32px 0;
}

.suite-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.suite-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.suite-card.active-module {
  border-color: hsla(142, 71%, 50%, 0.4);
  background: linear-gradient(180deg, hsla(142, 71%, 50%, 0.05) 0%, var(--bg-surface) 100%);
}

.suite-card.active-module:hover {
  transform: translateY(-4px);
  border-color: var(--accent-success);
  box-shadow: 0 12px 36px hsla(142, 71%, 50%, 0.15);
}

.suite-card.roadmap-module {
  border-color: var(--border-card);
}

.suite-card.roadmap-module:hover {
  transform: translateY(-4px);
  border-color: hsla(215, 30%, 45%, 0.6);
  box-shadow: 0 12px 32px hsla(0, 0%, 0%, 0.4);
}

.suite-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.suite-icon {
  font-size: 2rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.status-live {
  color: var(--accent-success);
  background: hsla(142, 71%, 50%, 0.12);
  border: 1px solid hsla(142, 71%, 50%, 0.3);
}

.status-alpha {
  color: var(--accent-amber);
  background: hsla(38, 92%, 55%, 0.12);
  border: 1px solid hsla(38, 92%, 55%, 0.3);
}

.status-research {
  color: var(--accent-cyan);
  background: hsla(187, 92%, 55%, 0.12);
  border: 1px solid hsla(187, 92%, 55%, 0.3);
}

.pulse-dot-green {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-success);
  box-shadow: 0 0 6px var(--accent-success);
  animation: pulse-dot 2s infinite ease-in-out;
}

.pulse-dot-amber {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-amber);
  box-shadow: 0 0 6px var(--accent-amber);
  animation: pulse-dot 2s infinite ease-in-out;
}

.suite-card-meta {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.suite-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.suite-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.suite-specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 16px;
  background: hsla(222, 40%, 10%, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.spec-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.spec-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.spec-val {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.suite-card-action {
  margin-top: auto;
}

/* --- Mathematical Rigor Section --- */
.math-section {
  padding: 64px 0 32px 0;
}

.math-card {
  padding: 36px;
  margin-top: 40px;
}

.math-formula-box {
  text-align: center;
  padding: 24px;
  background: hsla(222, 45%, 8%, 0.8);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  margin-bottom: 36px;
  box-shadow: 0 0 24px hsla(187, 92%, 55%, 0.1);
}

.formula-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.formula-code {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.math-var {
  color: var(--accent-cyan);
  font-weight: 600;
}

.math-pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.math-pillar {
  padding: 20px;
  background: hsla(222, 35%, 15%, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.pillar-number {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 8px;
  opacity: 0.8;
}

.pillar-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.pillar-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Institutional Trust & Sovereignty Section --- */
.trust-section {
  padding: 64px 0 32px 0;
}

.trust-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.trust-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
}

.trust-card-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.trust-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.trust-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.basket-error-msg {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid #ef4444;
  color: #fca5a5;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.88rem;
  margin: 12px 0 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: fadeIn 0.2s ease-in-out;
}

/* --- Scenario Tier Badges & Pro Hint --- */
.scenario-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.scenario-tier-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: hsla(215, 16%, 58%, 0.15);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.scenario-tier-badge.pro {
  background: hsla(217, 91%, 60%, 0.18);
  color: var(--accent-primary);
  border: 1px solid hsla(217, 91%, 60%, 0.3);
}

.scenario-pro-hint {
  font-size: 0.82rem;
  color: #fbbf24;
  background: hsla(38, 92%, 50%, 0.1);
  border: 1px solid hsla(38, 92%, 50%, 0.25);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* --- Upgrade Modal Card --- */
.upgrade-modal-card {
  max-width: 520px;
  text-align: left;
}

.upgrade-header {
  margin-bottom: 16px;
}

.upgrade-modal-reason {
  font-size: 0.95rem;
  color: #93c5fd;
  margin-top: 6px;
  line-height: 1.5;
}

.upgrade-pricing-box {
  display: flex;
  align-items: baseline;
  gap: 8px;
  background: hsla(217, 91%, 60%, 0.1);
  border: 1px solid hsla(217, 91%, 60%, 0.25);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.upgrade-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.upgrade-period {
  font-size: 1rem;
  color: var(--text-secondary);
}

.upgrade-cancel {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.upgrade-benefits-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.upgrade-benefits-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.45;
}

.upgrade-benefits-list li::before {
  content: "✓";
  color: var(--accent-success);
  font-weight: 800;
  font-size: 1rem;
}

.upgrade-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}