/* ==========================================================================
   APPEALARMOR DESIGN SYSTEM v1.0
   ADR-009: Unified Design System for Static Landing Pages
   Created: 2026-03-24

   Replaces Tailwind CDN for all public-facing static pages.
   One CSS file, zero dependencies, full responsive + a11y support.
   ========================================================================== */


/* --------------------------------------------------------------------------
   1. DESIGN TOKENS (CSS Custom Properties)
   -------------------------------------------------------------------------- */

:root {
  /* Brand Colors — Primary (Blue) */
  --aa-blue-900: #1e3a8a;
  --aa-blue-800: #1e40af;
  --aa-blue-700: #1d4ed8;
  --aa-blue-600: #2563eb;
  --aa-blue-200: #bfdbfe;
  --aa-blue-100: #dbeafe;
  --aa-blue-50:  #eff6ff;

  /* Brand Colors — Success / CTA (Green) */
  --aa-green-700: #15803d;
  --aa-green-600: #16a34a;
  --aa-green-50:  #f0fdf4;

  /* Brand Colors — Alert (Red) */
  --aa-red-900: #7f1d1d;
  --aa-red-800: #991b1b;
  --aa-red-700: #b91c1c;
  --aa-red-600: #dc2626;
  --aa-red-100: #fee2e2;
  --aa-red-50:  #fef2f2;

  /* Brand Colors — Amber */
  --aa-amber-700: #b45309;
  --aa-amber-50:  #fffbeb;

  /* Neutrals */
  --aa-gray-900: #111827;
  --aa-gray-800: #1f2937;
  --aa-gray-700: #374151;
  --aa-gray-600: #4b5563;
  --aa-gray-500: #6b7280;
  --aa-gray-400: #9ca3af;
  --aa-gray-300: #d1d5db;
  --aa-gray-200: #e5e7eb;
  --aa-gray-100: #f3f4f6;
  --aa-gray-50:  #f9fafb;
  --aa-white:    #ffffff;

  /* Typography */
  --aa-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                   'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji',
                   'Segoe UI Emoji';
  --aa-font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;

  /* Spacing Scale */
  --aa-space-1:  0.25rem;
  --aa-space-2:  0.5rem;
  --aa-space-3:  0.75rem;
  --aa-space-4:  1rem;
  --aa-space-6:  1.5rem;
  --aa-space-8:  2rem;
  --aa-space-10: 2.5rem;
  --aa-space-12: 3rem;
  --aa-space-16: 4rem;
  --aa-space-20: 5rem;
  --aa-space-24: 6rem;

  /* Shadows */
  --aa-shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.05);
  --aa-shadow:     0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --aa-shadow-md:  0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --aa-shadow-lg:  0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --aa-shadow-xl:  0 20px 25px rgba(0, 0, 0, 0.1), 0 8px 10px rgba(0, 0, 0, 0.04);

  /* Border Radius */
  --aa-radius-sm:  0.375rem;
  --aa-radius:     0.5rem;
  --aa-radius-lg:  0.75rem;
  --aa-radius-xl:  1rem;
  --aa-radius-full: 9999px;

  /* Transitions */
  --aa-transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --aa-container-max: 72rem;
  --aa-content-max:   56rem;
}


/* --------------------------------------------------------------------------
   2. RESET & BASE
   -------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--aa-font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--aa-gray-900);
  background-color: var(--aa-gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--aa-blue-600);
  outline-offset: 2px;
  border-radius: var(--aa-radius-sm);
}


/* --------------------------------------------------------------------------
   3. LAYOUT: Container & Sections
   -------------------------------------------------------------------------- */

.aa-container {
  max-width: var(--aa-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--aa-space-4);
  padding-right: var(--aa-space-4);
}

.aa-container--narrow {
  max-width: var(--aa-content-max);
}

.aa-section {
  padding-top: var(--aa-space-12);
  padding-bottom: var(--aa-space-12);
}

@media (min-width: 768px) {
  .aa-section {
    padding-top: var(--aa-space-16);
    padding-bottom: var(--aa-space-16);
  }
}


/* --------------------------------------------------------------------------
   4. HEADER (.aa-header)
   -------------------------------------------------------------------------- */

.aa-header {
  background: linear-gradient(135deg, var(--aa-blue-900) 0%, var(--aa-blue-800) 100%);
  color: var(--aa-white);
}

.aa-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--aa-container-max);
  margin: 0 auto;
  padding: var(--aa-space-4);
}

.aa-header__brand {
  display: flex;
  align-items: center;
  gap: var(--aa-space-3);
  text-decoration: none;
  color: var(--aa-white);
}

.aa-header__brand-icon {
  font-size: 1.5rem;
}

.aa-header__brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
}

.aa-header__brand-tagline {
  font-size: 0.75rem;
  opacity: 0.9;
  line-height: 1.2;
}

.aa-header__nav {
  display: none;
  gap: var(--aa-space-6);
  font-size: 0.875rem;
}

.aa-header__nav a {
  color: var(--aa-white);
  text-decoration: none;
  transition: color var(--aa-transition);
}

.aa-header__nav a:hover {
  color: var(--aa-blue-200);
}

@media (min-width: 768px) {
  .aa-header__nav {
    display: flex;
  }
}


/* --------------------------------------------------------------------------
   5. HERO SECTION (.aa-hero)
   -------------------------------------------------------------------------- */

.aa-hero {
  background: linear-gradient(135deg, var(--aa-blue-900) 0%, var(--aa-blue-800) 100%);
  color: var(--aa-white);
  padding: var(--aa-space-16) var(--aa-space-4);
  text-align: center;
}

.aa-hero__inner {
  max-width: var(--aa-content-max);
  margin: 0 auto;
}

.aa-hero__eyebrow {
  color: var(--aa-blue-200);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--aa-space-4);
}

.aa-hero__title {
  font-size: clamp(1.875rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: var(--aa-space-6);
}

.aa-hero__subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--aa-blue-100);
  line-height: 1.7;
  margin-bottom: var(--aa-space-8);
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
}

.aa-hero__note {
  color: var(--aa-blue-200);
  font-size: 0.875rem;
  margin-top: var(--aa-space-4);
}

@media (min-width: 1024px) {
  .aa-hero {
    padding: var(--aa-space-24) var(--aa-space-4);
  }
}


/* --------------------------------------------------------------------------
   6. BUTTONS
   -------------------------------------------------------------------------- */

.aa-btn-primary {
  display: inline-block;
  background-color: var(--aa-green-600);
  color: var(--aa-white);
  font-family: var(--aa-font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  padding: var(--aa-space-4) var(--aa-space-8);
  border: none;
  border-radius: var(--aa-radius-lg);
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--aa-transition), transform var(--aa-transition),
              box-shadow var(--aa-transition);
  box-shadow: var(--aa-shadow-lg);
  line-height: 1.4;
}

.aa-btn-primary:hover {
  background-color: var(--aa-green-700);
  transform: translateY(-1px);
  box-shadow: var(--aa-shadow-xl);
}

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

.aa-btn-primary i {
  margin-right: var(--aa-space-2);
}


/* --------------------------------------------------------------------------
   7. CARDS (.aa-card)
   -------------------------------------------------------------------------- */

.aa-card {
  background: var(--aa-white);
  border-radius: var(--aa-radius-xl);
  box-shadow: var(--aa-shadow-md);
  padding: var(--aa-space-6);
  border: 1px solid var(--aa-gray-200);
}

@media (min-width: 768px) {
  .aa-card {
    padding: var(--aa-space-8);
  }
}

.aa-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--aa-gray-900);
  margin-bottom: var(--aa-space-4);
}

.aa-card__text {
  color: var(--aa-gray-700);
  line-height: 1.7;
  margin-bottom: var(--aa-space-4);
}

.aa-card__text:last-child {
  margin-bottom: 0;
}


/* --------------------------------------------------------------------------
   8. STATS GRID (.aa-stats)
   -------------------------------------------------------------------------- */

.aa-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--aa-space-6);
}

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

.aa-stat {
  text-align: center;
  padding: var(--aa-space-4);
  border-radius: var(--aa-radius-lg);
}

.aa-stat--blue   { background-color: var(--aa-blue-50); }
.aa-stat--green  { background-color: var(--aa-green-50); }
.aa-stat--amber  { background-color: var(--aa-amber-50); }
.aa-stat--red    { background-color: var(--aa-red-50); }

.aa-stat__value {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
}

.aa-stat--blue  .aa-stat__value { color: var(--aa-blue-900); }
.aa-stat--green .aa-stat__value { color: var(--aa-green-700); }
.aa-stat--amber .aa-stat__value { color: var(--aa-amber-700); }
.aa-stat--red   .aa-stat__value { color: var(--aa-red-700); }

.aa-stat__label {
  font-size: 0.875rem;
  color: var(--aa-gray-600);
  margin-top: var(--aa-space-2);
}

.aa-stats__source {
  text-align: center;
  font-size: 0.875rem;
  color: var(--aa-gray-600);
  margin-top: var(--aa-space-6);
}


/* --------------------------------------------------------------------------
   9. STEPS / PROCESS (.aa-steps)
   -------------------------------------------------------------------------- */

.aa-steps {
  display: flex;
  flex-direction: column;
  gap: var(--aa-space-6);
}

.aa-step {
  display: flex;
  align-items: flex-start;
  gap: var(--aa-space-4);
}

.aa-step__number {
  width: 2.5rem;
  height: 2.5rem;
  min-width: 2.5rem;
  background-color: var(--aa-blue-600);
  color: var(--aa-white);
  border-radius: var(--aa-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.aa-step__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--aa-gray-900);
  margin-bottom: var(--aa-space-1);
}

.aa-step__text {
  color: var(--aa-gray-600);
  line-height: 1.7;
  margin-top: var(--aa-space-1);
}


/* --------------------------------------------------------------------------
   10. ALERT CALLOUT (.aa-callout)
   -------------------------------------------------------------------------- */

.aa-callout {
  display: flex;
  align-items: flex-start;
  gap: var(--aa-space-3);
  padding: var(--aa-space-4);
  border-radius: var(--aa-radius);
  margin: var(--aa-space-6) 0;
}

.aa-callout--danger {
  background-color: var(--aa-red-50);
  border-left: 4px solid var(--aa-red-600);
}

.aa-callout--danger .aa-callout__icon {
  color: var(--aa-red-600);
}

.aa-callout--danger .aa-callout__title {
  color: var(--aa-red-900);
}

.aa-callout--danger .aa-callout__text {
  color: var(--aa-red-800);
}

.aa-callout--info {
  background-color: var(--aa-blue-50);
  border-left: 4px solid var(--aa-blue-600);
}

.aa-callout--info .aa-callout__icon {
  color: var(--aa-blue-600);
}

.aa-callout--info .aa-callout__title {
  color: var(--aa-blue-900);
}

.aa-callout--info .aa-callout__text {
  color: var(--aa-blue-800);
}

.aa-callout__icon {
  margin-top: 0.125rem;
  flex-shrink: 0;
}

.aa-callout__title {
  font-weight: 700;
}

.aa-callout__text {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-top: var(--aa-space-1);
}


/* --------------------------------------------------------------------------
   11. LEGAL CITATIONS (.aa-citations)
   -------------------------------------------------------------------------- */

.aa-citations {
  display: flex;
  flex-direction: column;
  gap: var(--aa-space-4);
}

.aa-citation {
  padding-left: var(--aa-space-4);
  border-left: 4px solid var(--aa-blue-600);
}

.aa-citation__title {
  font-weight: 600;
  color: var(--aa-gray-900);
}

.aa-citation__text {
  font-size: 0.875rem;
  color: var(--aa-gray-600);
  line-height: 1.7;
  margin-top: var(--aa-space-1);
}


/* --------------------------------------------------------------------------
   12. FAQ ACCORDION (.aa-faq)
   -------------------------------------------------------------------------- */

.aa-faq {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.aa-faq details {
  border-top: 1px solid var(--aa-gray-200);
}

.aa-faq details:first-child {
  border-top: none;
}

.aa-faq summary {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--aa-gray-900);
  padding: var(--aa-space-6) 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--aa-space-4);
  transition: color var(--aa-transition);
}

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

.aa-faq summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--aa-gray-400);
  flex-shrink: 0;
  transition: transform var(--aa-transition);
}

.aa-faq details[open] summary::after {
  content: '\2212'; /* minus sign */
}

.aa-faq summary:hover {
  color: var(--aa-blue-700);
}

.aa-faq__answer {
  color: var(--aa-gray-600);
  line-height: 1.7;
  padding-bottom: var(--aa-space-6);
}


/* --------------------------------------------------------------------------
   13. ARTICLE LAYOUT (.aa-article)
   -------------------------------------------------------------------------- */

.aa-article {
  max-width: var(--aa-content-max);
  margin: 0 auto;
  padding: var(--aa-space-8) var(--aa-space-4);
}

.aa-article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--aa-gray-900);
  margin-top: var(--aa-space-10);
  margin-bottom: var(--aa-space-4);
}

.aa-article h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--aa-gray-900);
  margin-top: var(--aa-space-8);
  margin-bottom: var(--aa-space-3);
}

.aa-article p {
  color: var(--aa-gray-700);
  line-height: 1.7;
  margin-bottom: var(--aa-space-4);
}

.aa-article ul, .aa-article ol {
  padding-left: var(--aa-space-6);
  margin-bottom: var(--aa-space-4);
}

.aa-article li {
  color: var(--aa-gray-700);
  line-height: 1.7;
  margin-bottom: var(--aa-space-2);
}

.aa-article strong {
  color: var(--aa-gray-900);
}


/* --------------------------------------------------------------------------
   14. CTA BANNER (.aa-cta-banner)
   -------------------------------------------------------------------------- */

.aa-cta-banner {
  background: linear-gradient(135deg, var(--aa-blue-900) 0%, var(--aa-blue-800) 100%);
  color: var(--aa-white);
  padding: var(--aa-space-16) var(--aa-space-4);
  text-align: center;
}

.aa-cta-banner__inner {
  max-width: var(--aa-content-max);
  margin: 0 auto;
}

.aa-cta-banner__title {
  font-size: clamp(1.5rem, 3.5vw, 1.875rem);
  font-weight: 700;
  margin-bottom: var(--aa-space-4);
}

.aa-cta-banner__text {
  color: var(--aa-blue-100);
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--aa-space-8);
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}


/* --------------------------------------------------------------------------
   15. FOOTER (.aa-footer)
   -------------------------------------------------------------------------- */

.aa-footer {
  background-color: var(--aa-gray-900);
  color: var(--aa-gray-400);
  padding: var(--aa-space-8) var(--aa-space-4);
  text-align: center;
  font-size: 0.875rem;
}

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

.aa-footer__copy {
  color: var(--aa-gray-300);
}

.aa-footer__links {
  display: flex;
  justify-content: center;
  gap: var(--aa-space-4);
  margin-top: var(--aa-space-4);
}

.aa-footer__links a {
  color: var(--aa-gray-400);
  text-decoration: none;
  transition: color var(--aa-transition);
}

.aa-footer__links a:hover {
  color: var(--aa-white);
}

.aa-footer__disclaimer {
  margin-top: var(--aa-space-4);
  font-size: 0.75rem;
  opacity: 0.75;
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}


/* --------------------------------------------------------------------------
   16. CHECKLIST (.aa-checklist)
   -------------------------------------------------------------------------- */

.aa-checklist {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--aa-space-3);
}

.aa-checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--aa-space-3);
  color: var(--aa-gray-700);
  line-height: 1.6;
}

.aa-checklist li i {
  color: var(--aa-green-600);
  margin-top: 0.25rem;
  flex-shrink: 0;
}


/* --------------------------------------------------------------------------
   17. SMALL FEATURE GRID (.aa-feature-grid)
   -------------------------------------------------------------------------- */

.aa-feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--aa-space-4);
}

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

.aa-feature-card {
  background-color: var(--aa-green-50);
  border: 1px solid #bbf7d0;
  border-radius: var(--aa-radius-lg);
  padding: var(--aa-space-4);
}

.aa-feature-card__header {
  display: flex;
  align-items: center;
  gap: var(--aa-space-2);
  margin-bottom: var(--aa-space-2);
}

.aa-feature-card__header i {
  color: var(--aa-green-600);
}

.aa-feature-card__header h3 {
  font-weight: 600;
  font-size: 1rem;
  color: var(--aa-gray-900);
}

.aa-feature-card__text {
  font-size: 0.875rem;
  color: var(--aa-gray-600);
  line-height: 1.6;
}


/* --------------------------------------------------------------------------
   18. UTILITY CLASSES
   -------------------------------------------------------------------------- */

/* Text alignment */
.text-center { text-align: center; }

/* Margin bottom */
.mb-0  { margin-bottom: 0; }
.mb-2  { margin-bottom: var(--aa-space-2); }
.mb-4  { margin-bottom: var(--aa-space-4); }
.mb-6  { margin-bottom: var(--aa-space-6); }
.mb-8  { margin-bottom: var(--aa-space-8); }
.mb-12 { margin-bottom: var(--aa-space-12); }

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--aa-space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--aa-space-6);
}

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

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


/* --------------------------------------------------------------------------
   19. RESPONSIVE BREAKPOINTS — Global overrides
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {
  .aa-hero__title {
    font-size: 1.75rem;
  }

  .aa-card {
    padding: var(--aa-space-4) var(--aa-space-4);
  }

  .aa-btn-primary {
    display: block;
    text-align: center;
    width: 100%;
  }

  .aa-step {
    gap: var(--aa-space-3);
  }

  .aa-step__number {
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
    font-size: 0.875rem;
  }
}

@media (min-width: 1024px) {
  .aa-container {
    padding-left: var(--aa-space-8);
    padding-right: var(--aa-space-8);
  }
}


/* --------------------------------------------------------------------------
   20. PRINT STYLES
   -------------------------------------------------------------------------- */

@media print {
  .aa-header,
  .aa-footer,
  .aa-cta-banner,
  .aa-btn-primary {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .aa-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}