/* ============================================================
   A11y Defense – Site Styles
   WCAG 2.2 AA compliant color palette and layout
   ============================================================ */

/* ── Custom Properties ────────────────────────────────────── */
:root {
  /* Brand Colors */
  --color-navy:        #0d2b4e;   /* primary dark blue */
  --color-blue:        #1a5276;   /* secondary blue */
  --color-blue-mid:    #2e86c1;   /* action / links */
  --color-blue-light:  #d6eaf8;   /* tinted backgrounds */
  --color-teal:        #1a7a6e;   /* accent blue-green */
  --color-teal-light:  #d1f2eb;   /* tinted teal bg */
  --color-green:       #1e8449;   /* success / affirm */
  --color-green-light: #d5f5e3;   /* tinted green bg */

  /* Neutrals */
  --color-white:       #ffffff;
  --color-gray-050:    #f4f6f8;
  --color-gray-100:    #e8ecf0;
  --color-gray-200:    #ccd3db;
  --color-gray-400:    #7f8c8d;
  --color-gray-700:    #2c3e50;
  --color-gray-900:    #1a1a2e;

  /* Semantic */
  --color-text:        var(--color-gray-900);
  --color-text-muted:  var(--color-gray-700);
  --color-bg:          var(--color-white);
  --color-bg-alt:      var(--color-gray-050);
  --color-border:      var(--color-gray-200);
  --color-link:        #1558b0;   /* ≥ 4.5:1 on white */
  --color-link-hover:  #0d3d7a;
  --color-focus:       #d4700a;   /* high-vis orange focus ring */
  --color-error:       #b91c1c;
  --color-success:     var(--color-green);

  /* Notice & Footer */
  --color-notice-bg:   #7a4f00;   /* amber-brown for notice bar */
  --color-footer-muted: #a8b9cc;  /* muted blue-gray for footer text */

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
  --font-size-base: 1rem;       /* 16px */
  --line-height-base: 1.6;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Layout */
  --container-max:     72rem;    /* 1152px */
  --container-narrow:  52rem;    /* 832px */
  --header-height:     4rem;

  /* Borders */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.10), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.07), 0 4px 6px rgba(0,0,0,0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ── Reset ────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Ensure the hidden attribute always hides elements, even when
   inline styles include display declarations. */
[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

/* ── Focus Styles ─────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Remove default focus for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* ── Notice Bar ───────────────────────────────────────────── */
.notice-bar {
  background: var(--color-notice-bg);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-2) var(--space-6);
  font-size: 0.875rem;
  line-height: 1.5;
  position: relative;
  z-index: 101;
}

.notice-bar__text {
  margin: 0;
  max-width: none;
}

.notice-bar a {
  color: var(--color-white);
  text-decoration: underline;
}

.notice-bar.error {
  background: var(--color-error);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-2) var(--space-6);
  font-size: 0.875rem;
  line-height: 1.5;
  position: relative;
  z-index: 101;
}

/* ── Skip Link ────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-navy);
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  border: 2px solid var(--color-white);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-navy);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.375rem, 3vw, 1.875rem); }
h3 { font-size: clamp(1.125rem, 2.5vw, 1.375rem); }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  margin: 0 0 var(--space-4);
  max-width: 70ch;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-thickness: 2px;
}

ul, ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
}

strong {
  font-weight: 700;
}

blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  border-left: 4px solid var(--color-blue-mid);
  background: var(--color-blue-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

blockquote p:last-child {
  margin-bottom: 0;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-gray-100);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background: var(--color-gray-900);
  color: #e2e8f0;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 0 0 var(--space-4);
}

pre code {
  font-size: inherit;
  background: transparent;
  padding: 0;
  color: inherit;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

/* ── Site Header ──────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-navy);
  border-bottom: 3px solid var(--color-teal);
  box-shadow: var(--shadow-md);
}

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

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-white);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-logo:hover {
  color: var(--color-blue-light);
}

.site-logo:focus-visible {
  outline-color: var(--color-focus);
}

.site-logo__icon {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-mark {
  position: relative;
}

.logo-mark__base {
  font-size: 2rem;
  color: var(--color-teal);
}

.logo-mark__overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1rem;
  color: var(--color-white);
}

/* ── Primary Navigation ───────────────────────────────────── */
.site-nav {
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: #c8d8ec;
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

.site-nav__link[aria-current="page"],
.site-nav__link.is-active {
  color: var(--color-white);
  border-bottom-color: var(--color-teal);
  font-weight: 700;
}

.site-nav__link:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.nav-toggle:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
}

.nav-toggle:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.nav-toggle__icon {
  font-size: 1.125rem;
}

/* ── Site Footer ──────────────────────────────────────────── */
.site-footer {
  background: var(--color-navy);
  color: #a8b9cc;
  padding: var(--space-12) 0 var(--space-8);
  margin-top: auto;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.site-footer h3 {
  color: var(--color-white);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links li {
  margin-bottom: var(--space-2);
}

.site-footer__links a {
  color: var(--color-footer-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.site-footer__links a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.site-footer__links a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.site-footer__tagline {
  font-size: 0.9375rem;
  max-width: 24ch;
  color: var(--color-footer-muted);
}

.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
}

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

.site-footer__bottom a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.site-footer__bottom a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Page Layout ──────────────────────────────────────────── */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

.page-content {
  flex: 1;
}

.page-content > .container {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-blue) 60%, var(--color-teal) 100%);
  color: var(--color-white);
  padding: var(--space-24) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 42rem;
}

.hero__label {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  color: var(--color-blue-light);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
}

.hero__heading {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.hero__text {
  font-size: 1.125rem;
  line-height: 1.7;
  color: #c8d8ec;
  margin-bottom: var(--space-8);
  max-width: 38rem;
}

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

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  line-height: 1.25;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--color-teal);
  color: var(--color-white);
  border-color: var(--color-teal);
}

.btn--primary:hover {
  background: #155f55;
  border-color: #155f55;
  color: var(--color-white);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.6);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn--blue {
  background: var(--color-blue-mid);
  color: var(--color-white);
  border-color: var(--color-blue-mid);
}

.btn--blue:hover {
  background: #2471a3;
  border-color: #2471a3;
  color: var(--color-white);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1.0625rem;
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Section Layouts ──────────────────────────────────────── */
.section {
  padding: var(--space-16) 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--navy {
  background: var(--color-navy);
  color: var(--color-white);
}

.section--navy h2,
.section--navy h3 {
  color: var(--color-white);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-teal);
  margin-bottom: var(--space-3);
}

.section--navy .section__eyebrow {
  color: #7ed6cc;
}

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

.section__lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 52ch;
  margin: 0 auto;
}

.section--navy .section__lead {
  color: #a8b9cc;
}

/* ── Cards ────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: var(--space-6);
}

.card-grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card--link {
  text-decoration: none;
  color: var(--color-text);
  display: block;
}

.card--link:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-lg);
}

.card__icon {
  width: 3rem;
  height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--space-4);
  color: var(--color-teal);
}

.card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-2);
}

.card__body {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.card__body p:last-child {
  margin-bottom: 0;
}

.card__footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ── Resource Path / Steps ────────────────────────────────── */
.path-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-6);
  position: relative;
}

.path-step {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: var(--space-6);
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
}

.path-step__number {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-navy);
  color: var(--color-white);
  font-weight: 800;
  font-size: 1rem;
  border-radius: 50%;
  margin-bottom: var(--space-4);
  flex-shrink: 0;
}

.path-step__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-2);
}

.path-step__body {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ── Page Header (interior pages) ────────────────────────── */
.page-header {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-blue) 100%);
  color: var(--color-white);
  padding: var(--space-12) 0;
}

.page-header__eyebrow {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #7ed6cc;
  display: block;
  margin-bottom: var(--space-3);
}

.page-header__title {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.page-header__description {
  font-size: 1.0625rem;
  color: #c8d8ec;
  max-width: 52ch;
  line-height: 1.7;
  margin: 0;
}

/* ── Breadcrumb ───────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: 0;
  font-size: 0.875rem;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
}

.breadcrumb__item::before {
  content: "";
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "›";
  color: rgba(255, 255, 255, 0.6);
  speak: none;
}

.breadcrumb__link {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.breadcrumb__link:hover {
  color: rgba(255, 255, 255, 0.85);
}

.breadcrumb__item[aria-current="page"] {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
}

/* ── Topic List ───────────────────────────────────────────── */
.topic-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(22rem, 1fr));
  gap: var(--space-6);
}

.topic-item {
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-teal);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.topic-item__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-3);
}

.topic-item__body {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.topic-item__body p:last-child {
  margin-bottom: 0;
}

.topic-item__list {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  padding-left: var(--space-6);
  margin: 0;
}

/* ── Alert / Callout ──────────────────────────────────────── */
.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 0.9375rem;
}

.alert--info {
  background: var(--color-blue-light);
  border-color: var(--color-blue-mid);
  color: #1a3a5c;
}

.alert--success {
  background: var(--color-green-light);
  border-color: var(--color-green);
  color: #14532d;
}

.alert--teal {
  background: var(--color-teal-light);
  border-color: var(--color-teal);
  color: #0f4c43;
}

.alert__icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.1em;
}

.alert__content p:last-child {
  margin-bottom: 0;
}

/* ── Table ────────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-6);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  background: var(--color-white);
}

th {
  background: var(--color-navy);
  color: var(--color-white);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

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

tr:nth-child(even) {
  background: var(--color-gray-050);
}

/* ── Design System Page ───────────────────────────────────── */
.ds-layout {
  display: grid;
  grid-template-columns: 16rem 1fr;
  gap: var(--space-8);
  align-items: start;
}

.ds-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
  max-height: calc(100vh - var(--header-height) - var(--space-8));
  overflow-y: auto;
  padding: var(--space-6);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.ds-sidebar__heading {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.ds-sidebar__nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ds-sidebar__nav li {
  margin: 0;
}

.ds-sidebar__nav a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.ds-sidebar__nav a:hover {
  background: var(--color-blue-light);
  color: var(--color-navy);
}

.ds-sidebar__nav a[aria-current="page"],
.ds-sidebar__nav a.is-active {
  background: var(--color-navy);
  color: var(--color-white);
  font-weight: 600;
}

.ds-sidebar__nav a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.ds-content section {
  margin-bottom: var(--space-12);
}

.ds-content h2 {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-6);
}

/* Component demo box */
.component-demo {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  margin-bottom: var(--space-4);
  background: var(--color-white);
}

.component-demo--dark {
  background: var(--color-gray-050);
}

/* Code tabs */
.code-tabs {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-6);
}

.code-tabs__tablist {
  display: flex;
  background: var(--color-gray-100);
  border-bottom: 1px solid var(--color-border);
}

.code-tabs__tab {
  padding: var(--space-3) var(--space-6);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.code-tabs__tab[aria-selected="true"] {
  color: var(--color-navy);
  border-bottom-color: var(--color-teal);
  background: var(--color-white);
}

.code-tabs__tab:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: -3px;
}

.code-tabs__panel {
  display: none;
}

.code-tabs__panel[aria-hidden="false"],
.code-tabs__panel.is-active {
  display: block;
}

.code-tabs__panel pre {
  margin: 0;
  border-radius: 0;
}

/* ── Inline Tag / Badge ───────────────────────────────────── */
.tag {
  display: inline-block;
  padding: 0.1em 0.6em;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-lg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tag--blue {
  background: var(--color-blue-light);
  color: #1a3a5c;
}

.tag--teal {
  background: var(--color-teal-light);
  color: #0f4c43;
}

.tag--green {
  background: var(--color-green-light);
  color: #14532d;
}

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

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mt-8 { margin-top: var(--space-8); }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.full-width { max-width: none; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 64em) {
  .ds-layout {
    grid-template-columns: 1fr;
  }
  .ds-sidebar {
    position: static;
    max-height: none;
  }
}

@media (max-width: 48em) {
  :root {
    --header-height: 3.5rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-navy);
    border-top: 2px solid var(--color-teal);
    box-shadow: var(--shadow-lg);
    display: none;
    padding: var(--space-4) 0;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 var(--space-4);
  }

  .site-nav__link {
    padding: var(--space-3) var(--space-4);
    border-bottom: none;
    border-left: 3px solid transparent;
    border-radius: 0;
  }

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--color-teal);
    background: rgba(255,255,255,0.05);
  }

  .hero {
    padding: var(--space-16) 0 var(--space-12);
  }

  .section {
    padding: var(--space-12) 0;
  }

  .path-steps {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .card-grid--3 {
    grid-template-columns: 1fr;
  }

  .topic-list {
    grid-template-columns: 1fr;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn--lg {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 30em) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding-inline: var(--space-4);
  }
}

/* ── Print ────────────────────────────────────────────────── */
@media print {
  .site-header,
  .site-footer,
  .skip-link,
  .nav-toggle {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.75em;
  }
}

/* ── Icon Definitions (Font Awesome 6.7.2 Free) ───────────── */
/* Self-contained SVG icons — no CDN required                  */
/* Icons: CC BY 4.0 – https://fontawesome.com/license/free     */

.fa-solid {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
  background-color: currentColor;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-position: center;
  mask-position: center;
}

.fa-bars {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512'%3E%3Cpath d='M0 96C0 78.3 14.3 64 32 64l384 0c17.7 0 32 14.3 32 32s-14.3 32-32 32L32 128C14.3 128 0 113.7 0 96zM0 256c0-17.7 14.3-32 32-32l384 0c17.7 0 32 14.3 32 32s-14.3 32-32 32L32 288c-17.7 0-32-14.3-32-32zM448 416c0 17.7-14.3 32-32 32L32 448c-17.7 0-32-14.3-32-32s14.3-32 32-32l384 0c17.7 0 32 14.3 32 32z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512'%3E%3Cpath d='M0 96C0 78.3 14.3 64 32 64l384 0c17.7 0 32 14.3 32 32s-14.3 32-32 32L32 128C14.3 128 0 113.7 0 96zM0 256c0-17.7 14.3-32 32-32l384 0c17.7 0 32 14.3 32 32s-14.3 32-32 32L32 288c-17.7 0-32-14.3-32-32zM448 416c0 17.7-14.3 32-32 32L32 448c-17.7 0-32-14.3-32-32s14.3-32 32-32l384 0c17.7 0 32 14.3 32 32z'/%3E%3C/svg%3E");
}

.fa-shield-halved {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M256 0c4.6 0 9.2 1 13.4 2.9L457.7 82.8c22 9.3 38.4 31 38.3 57.2c-.5 99.2-41.3 280.7-213.6 363.2c-16.7 8-36.1 8-52.8 0C57.3 420.7 16.5 239.2 16 140c-.1-26.2 16.3-47.9 38.3-57.2L242.7 2.9C246.8 1 251.4 0 256 0zm0 66.8l0 378.1C394 378 431.1 230.1 432 141.4L256 66.8s0 0 0 0z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M256 0c4.6 0 9.2 1 13.4 2.9L457.7 82.8c22 9.3 38.4 31 38.3 57.2c-.5 99.2-41.3 280.7-213.6 363.2c-16.7 8-36.1 8-52.8 0C57.3 420.7 16.5 239.2 16 140c-.1-26.2 16.3-47.9 38.3-57.2L242.7 2.9C246.8 1 251.4 0 256 0zm0 66.8l0 378.1C394 378 431.1 230.1 432 141.4L256 66.8s0 0 0 0z'/%3E%3C/svg%3E");
}

.fa-universal-access {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M0 256a256 256 0 1 1 512 0A256 256 0 1 1 0 256zm161.5-86.1c-12.2-5.2-26.3 .4-31.5 12.6s.4 26.3 12.6 31.5l11.9 5.1c17.3 7.4 35.2 12.9 53.6 16.3l0 50.1c0 4.3-.7 8.6-2.1 12.6l-28.7 86.1c-4.2 12.6 2.6 26.2 15.2 30.4s26.2-2.6 30.4-15.2l24.4-73.2c1.3-3.8 4.8-6.4 8.8-6.4s7.6 2.6 8.8 6.4l24.4 73.2c4.2 12.6 17.8 19.4 30.4 15.2s19.4-17.8 15.2-30.4l-28.7-86.1c-1.4-4.1-2.1-8.3-2.1-12.6l0-50.1c18.4-3.5 36.3-8.9 53.6-16.3l11.9-5.1c12.2-5.2 17.8-19.3 12.6-31.5s-19.3-17.8-31.5-12.6L338.7 175c-26.1 11.2-54.2 17-82.7 17s-56.5-5.8-82.7-17l-11.9-5.1zM256 160a40 40 0 1 0 0-80 40 40 0 1 0 0 80z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M0 256a256 256 0 1 1 512 0A256 256 0 1 1 0 256zm161.5-86.1c-12.2-5.2-26.3 .4-31.5 12.6s.4 26.3 12.6 31.5l11.9 5.1c17.3 7.4 35.2 12.9 53.6 16.3l0 50.1c0 4.3-.7 8.6-2.1 12.6l-28.7 86.1c-4.2 12.6 2.6 26.2 15.2 30.4s26.2-2.6 30.4-15.2l24.4-73.2c1.3-3.8 4.8-6.4 8.8-6.4s7.6 2.6 8.8 6.4l24.4 73.2c4.2 12.6 17.8 19.4 30.4 15.2s19.4-17.8 15.2-30.4l-28.7-86.1c-1.4-4.1-2.1-8.3-2.1-12.6l0-50.1c18.4-3.5 36.3-8.9 53.6-16.3l11.9-5.1c12.2-5.2 17.8-19.3 12.6-31.5s-19.3-17.8-31.5-12.6L338.7 175c-26.1 11.2-54.2 17-82.7 17s-56.5-5.8-82.7-17l-11.9-5.1zM256 160a40 40 0 1 0 0-80 40 40 0 1 0 0 80z'/%3E%3C/svg%3E");
}

.fa-file-circle-check {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 576 512'%3E%3Cpath d='M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 38.6C310.1 219.5 256 287.4 256 368c0 59.1 29.1 111.3 73.7 143.3c-3.2 .5-6.4 .7-9.7 .7L64 512c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM288 368a144 144 0 1 1 288 0 144 144 0 1 1 -288 0zm211.3-43.3c-6.2-6.2-16.4-6.2-22.6 0L416 385.4l-28.7-28.7c-6.2-6.2-16.4-6.2-22.6 0s-6.2 16.4 0 22.6l40 40c6.2 6.2 16.4 6.2 22.6 0l72-72c6.2-6.2 6.2-16.4 0-22.6z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 576 512'%3E%3Cpath d='M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 38.6C310.1 219.5 256 287.4 256 368c0 59.1 29.1 111.3 73.7 143.3c-3.2 .5-6.4 .7-9.7 .7L64 512c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM288 368a144 144 0 1 1 288 0 144 144 0 1 1 -288 0zm211.3-43.3c-6.2-6.2-16.4-6.2-22.6 0L416 385.4l-28.7-28.7c-6.2-6.2-16.4-6.2-22.6 0s-6.2 16.4 0 22.6l40 40c6.2 6.2 16.4 6.2 22.6 0l72-72c6.2-6.2 6.2-16.4 0-22.6z'/%3E%3C/svg%3E");
}

.fa-gavel {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M318.6 9.4c-12.5-12.5-32.8-12.5-45.3 0l-120 120c-12.5 12.5-12.5 32.8 0 45.3l16 16c12.5 12.5 32.8 12.5 45.3 0l4-4L325.4 293.4l-4 4c-12.5 12.5-12.5 32.8 0 45.3l16 16c12.5 12.5 32.8 12.5 45.3 0l120-120c12.5-12.5 12.5-32.8 0-45.3l-16-16c-12.5-12.5-32.8-12.5-45.3 0l-4 4L330.6 74.6l4-4c12.5-12.5 12.5-32.8 0-45.3l-16-16zm-152 288c-12.5-12.5-32.8-12.5-45.3 0l-112 112c-12.5 12.5-12.5 32.8 0 45.3l48 48c12.5 12.5 32.8 12.5 45.3 0l112-112c12.5-12.5 12.5-32.8 0-45.3l-1.4-1.4L272 285.3 226.7 240 168 298.7l-1.4-1.4z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M318.6 9.4c-12.5-12.5-32.8-12.5-45.3 0l-120 120c-12.5 12.5-12.5 32.8 0 45.3l16 16c12.5 12.5 32.8 12.5 45.3 0l4-4L325.4 293.4l-4 4c-12.5 12.5-12.5 32.8 0 45.3l16 16c12.5 12.5 32.8 12.5 45.3 0l120-120c12.5-12.5 12.5-32.8 0-45.3l-16-16c-12.5-12.5-32.8-12.5-45.3 0l-4 4L330.6 74.6l4-4c12.5-12.5 12.5-32.8 0-45.3l-16-16zm-152 288c-12.5-12.5-32.8-12.5-45.3 0l-112 112c-12.5 12.5-12.5 32.8 0 45.3l48 48c12.5 12.5 32.8 12.5 45.3 0l112-112c12.5-12.5 12.5-32.8 0-45.3l-1.4-1.4L272 285.3 226.7 240 168 298.7l-1.4-1.4z'/%3E%3C/svg%3E");
}