/* ============================================================
   dusk.li – main stylesheet
   WCAG 2.1 AA compliant, system fonts, dark mode first-class
   ============================================================ */

/* ── Custom Properties ──────────────────────────────────────── */
:root {
  /* Light mode colours */
  --colour-bg:          #ffffff;
  --colour-bg-alt:      #f6f8fa;
  --colour-bg-stripe:   #f0f2f5;
  --colour-text:        #1a1a2e;
  --colour-muted:       #57606a;
  --colour-accent:      #0066cc;
  --colour-accent-dark: #0052a3;
  --colour-border:      #d0d7de;
  --colour-badge-pass-bg:    #1a7f37;
  --colour-badge-pass-text:  #ffffff;
  --colour-badge-fail-bg:    #cf222e;
  --colour-badge-fail-text:  #ffffff;
  --colour-badge-blocked-bg: #9a6700;
  --colour-badge-blocked-text: #ffffff;
  --colour-focus:       #0066cc;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --font-size-base: 1rem;
  --line-height-base: 1.6;
  --line-height-heading: 1.2;

  /* Layout */
  --max-width: 1100px;
  --header-height: 3.5rem;

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

/* Dark mode via media query */
@media (prefers-color-scheme: dark) {
  :root {
    --colour-bg:          #0d1117;
    --colour-bg-alt:      #161b22;
    --colour-bg-stripe:   #1c2128;
    --colour-text:        #e6edf3;
    --colour-muted:       #8b949e;
    --colour-accent:      #58a6ff;
    --colour-accent-dark: #79b8ff;
    --colour-border:      #30363d;
    --colour-badge-pass-bg:    #238636;
    --colour-badge-pass-text:  #ffffff;
    --colour-badge-fail-bg:    #da3633;
    --colour-badge-fail-text:  #ffffff;
    --colour-badge-blocked-bg: #bb8009;
    --colour-badge-blocked-text: #0d1117;
    --colour-focus:       #58a6ff;
  }
}

/* Manual dark override */
[data-theme="dark"] {
  --colour-bg:          #0d1117;
  --colour-bg-alt:      #161b22;
  --colour-bg-stripe:   #1c2128;
  --colour-text:        #e6edf3;
  --colour-muted:       #8b949e;
  --colour-accent:      #58a6ff;
  --colour-accent-dark: #79b8ff;
  --colour-border:      #30363d;
  --colour-badge-pass-bg:    #238636;
  --colour-badge-pass-text:  #ffffff;
  --colour-badge-fail-bg:    #da3633;
  --colour-badge-fail-text:  #ffffff;
  --colour-badge-blocked-bg: #bb8009;
  --colour-badge-blocked-text: #0d1117;
  --colour-focus:       #58a6ff;
}

/* Manual light override (beats media query) */
[data-theme="light"] {
  --colour-bg:          #ffffff;
  --colour-bg-alt:      #f6f8fa;
  --colour-bg-stripe:   #f0f2f5;
  --colour-text:        #1a1a2e;
  --colour-muted:       #57606a;
  --colour-accent:      #0066cc;
  --colour-accent-dark: #0052a3;
  --colour-border:      #d0d7de;
  --colour-badge-pass-bg:    #1a7f37;
  --colour-badge-pass-text:  #ffffff;
  --colour-badge-fail-bg:    #cf222e;
  --colour-badge-fail-text:  #ffffff;
  --colour-badge-blocked-bg: #9a6700;
  --colour-badge-blocked-text: #ffffff;
  --colour-focus:       #0066cc;
}

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

/* ── Base ────────────────────────────────────────────────────── */
html {
  font-size: 100%;
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--colour-text);
  background-color: var(--colour-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Skip Link ───────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background: var(--colour-accent);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 4px 0;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* ── Focus Indicators ────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ── Typography ──────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  line-height: var(--line-height-heading);
  font-weight: 700;
  color: var(--colour-text);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.35rem, 3vw, 1.75rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.35rem); }

p { margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }

a {
  color: var(--colour-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

a:hover, a:focus {
  color: var(--colour-accent-dark);
}

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

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

main {
  flex: 1;
  padding-block: var(--space-2xl);
}

/* ── Site Header ─────────────────────────────────────────────── */
.site-header {
  background-color: var(--colour-bg-alt);
  border-bottom: 1px solid var(--colour-border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-base);
}

.header-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--colour-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.site-title:hover, .site-title:focus {
  color: var(--colour-accent);
}

.dot {
  color: var(--colour-accent);
}

/* ── Site Navigation ─────────────────────────────────────────── */
.site-nav {
  flex: 1;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--colour-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--colour-text);
  background-color: var(--colour-border);
}

.site-nav a[aria-current="page"] {
  color: var(--colour-accent);
  font-weight: 600;
}

.site-nav a.nav-request {
  padding: 0.25rem 0.75rem;
  border: 2px solid var(--colour-accent);
  border-radius: 6px;
  color: var(--colour-accent);
  font-weight: 600;
  white-space: nowrap;
}

.site-nav a.nav-request:hover,
.site-nav a.nav-request:focus {
  background-color: var(--colour-accent);
  color: #ffffff;
}

/* ── Review request CTA ──────────────────────────────────────── */
.review-request-cta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  background: var(--colour-bg-alt);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
}

.review-request-cta p {
  margin: 0;
  color: var(--colour-muted);
  font-size: 0.9375rem;
  max-width: none;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: none;
  border: 1px solid var(--colour-border);
  color: var(--colour-muted);
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  font-size: 0.875rem;
  font-family: inherit;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
  white-space: nowrap;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: var(--colour-text);
  border-color: var(--colour-accent);
  background-color: var(--colour-bg-stripe);
}

/* Icon visibility: light mode shows moon, dark mode shows sun */
.sun-icon { display: none; }
.moon-icon { display: block; }

[data-theme="dark"] .sun-icon,
[data-theme="dark"] .moon-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: inline; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .sun-icon { display: inline; }
  :root:not([data-theme="light"]) .moon-icon { display: none; }
}

/* ── Site Footer ─────────────────────────────────────────────── */
.site-footer {
  background-color: var(--colour-bg-alt);
  border-top: 1px solid var(--colour-border);
  padding-block: var(--space-lg);
  transition: background-color var(--transition-base);
}

.footer-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
  text-align: center;
  color: var(--colour-muted);
  font-size: 0.875rem;
}

.footer-inner a {
  color: var(--colour-muted);
}

.footer-inner a:hover {
  color: var(--colour-accent);
}

/* ── Hero Section ────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
  max-width: var(--max-width);
  margin-inline: auto;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}

.tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--colour-muted);
  font-style: italic;
  margin-bottom: var(--space-md);
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--colour-muted);
  max-width: 55ch;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}

.hero-links {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--colour-accent);
  color: #ffffff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--colour-accent);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
}

.btn:hover, .btn:focus {
  background-color: var(--colour-accent-dark);
  border-color: var(--colour-accent-dark);
  color: #ffffff;
}

.btn-outline {
  background-color: transparent;
  color: var(--colour-accent);
}

.btn-outline:hover, .btn-outline:focus {
  background-color: var(--colour-accent);
  color: #ffffff;
}

/* ── Stats Strip ─────────────────────────────────────────────── */
.stats-strip {
  background-color: var(--colour-bg-alt);
  border-top: 1px solid var(--colour-border);
  border-bottom: 1px solid var(--colour-border);
  padding-block: var(--space-xl);
  margin-top: var(--space-2xl);
  transition: background-color var(--transition-base);
}

.stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  flex-wrap: wrap;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.stat {
  text-align: center;
}

.stat dt {
  font-size: 0.875rem;
  color: var(--colour-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.stat dd {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--colour-accent);
  line-height: 1;
}

/* ── Content Pages ───────────────────────────────────────────── */
.content {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.page-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--colour-border);
}

.prose {
  line-height: 1.75;
}

.prose > p,
.prose > ul,
.prose > ol,
.prose > blockquote,
.prose > h2,
.prose > h3 {
  max-width: 70ch;
}

.prose h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--colour-border);
}

.prose h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.prose p {
  margin-bottom: var(--space-md);
}

.prose ul, .prose ol {
  margin-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

.prose li {
  margin-bottom: var(--space-xs);
}

.prose blockquote {
  border-left: 4px solid var(--colour-accent);
  padding-left: var(--space-md);
  color: var(--colour-muted);
  margin-block: var(--space-md);
  font-style: italic;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--colour-bg-stripe);
  padding: 0.125em 0.375em;
  border-radius: 3px;
  border: 1px solid var(--colour-border);
}

.prose pre {
  background-color: var(--colour-bg-stripe);
  border: 1px solid var(--colour-border);
  border-radius: 6px;
  padding: var(--space-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.875rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-md);
  font-size: 0.9375rem;
}

.prose th, .prose td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--colour-border);
  text-align: left;
}

.prose th {
  background-color: var(--colour-bg-alt);
  font-weight: 600;
}

.prose tr:nth-child(even) td {
  background-color: var(--colour-bg-stripe);
}

/* ── Sites Status ────────────────────────────────────────────── */
.sites-status {
  color: var(--colour-muted);
  font-size: 0.9375rem;
  margin-bottom: var(--space-lg);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--colour-bg-alt);
  border-radius: 6px;
  border: 1px solid var(--colour-border);
  display: inline-block;
}

/* ── Table ───────────────────────────────────────────────────── */

.table-wrapper {
  width: 100%;
  overflow-x: auto;
  overflow-y: auto;
  max-height: 80vh;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--colour-border);
  border-radius: 6px;
  margin-top: var(--space-md);
  margin-bottom: var(--space-md);
}

.table-wrapper:focus {
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
}

.table-wrapper table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  min-width: 600px;
  table-layout: auto;
}

.table-wrapper caption {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-weight: 600;
  color: var(--colour-muted);
  font-size: 0.875rem;
  background-color: var(--colour-bg-alt);
  border-bottom: 1px solid var(--colour-border);
}

.table-wrapper thead th {
  background-color: var(--colour-bg-alt);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
  border-bottom: 2px solid var(--colour-border);
  color: var(--colour-text);
  position: sticky;
  top: 0;
  z-index: 1;
}

.table-wrapper tbody tr:nth-child(even) td {
  background-color: var(--colour-bg-stripe);
}

.table-wrapper tbody tr:hover td {
  background-color: var(--colour-bg-alt);
}

.table-wrapper td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--colour-border);
  vertical-align: middle;
}

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

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}

.badge--pass {
  background-color: var(--colour-badge-pass-bg);
  color: var(--colour-badge-pass-text);
}

.badge--fail {
  background-color: var(--colour-badge-fail-bg);
  color: var(--colour-badge-fail-text);
}

.badge--blocked {
  background-color: var(--colour-badge-blocked-bg);
  color: var(--colour-badge-blocked-text);
}

/* ── Search Input ────────────────────────────────────────────── */
.search-wrapper {
  margin-bottom: var(--space-md);
}

.search-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  font-size: 0.9375rem;
}

.search-input {
  width: 100%;
  max-width: 400px;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--colour-border);
  border-radius: 6px;
  background-color: var(--colour-bg);
  color: var(--colour-text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--colour-accent);
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
}

.search-input::placeholder {
  color: var(--colour-muted);
}

/* ── Page List ───────────────────────────────────────────────── */
.page-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.page-list a {
  font-size: 1.0625rem;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  .header-inner {
    gap: var(--space-sm);
  }

  .theme-label {
    display: none;
  }

  .site-nav a.nav-request {
    display: none;
  }

  .stats {
    gap: var(--space-xl);
  }
}

/* table controls bar */
.table-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.table-search {
  flex: 1;
  min-width: 200px;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  background: var(--colour-bg);
  color: var(--colour-text);
  font-size: 0.95rem;
}

.table-search:focus-visible {
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
}

.table-count {
  font-size: 0.875rem;
  color: var(--colour-muted);
  white-space: nowrap;
}

/* sort buttons inside th */
.sort-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-weight: 600;
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  white-space: nowrap;
}

.sort-btn:focus-visible {
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.sort-btn::after {
  content: '⇅';
  font-size: 0.8em;
  opacity: 0.4;
}

th[aria-sort="ascending"] .sort-btn::after  { content: '↑'; opacity: 1; }
th[aria-sort="descending"] .sort-btn::after { content: '↓'; opacity: 1; }

/* column filter selects */
.col-filter {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.2rem 0.4rem;
  font-size: 0.8rem;
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  background: var(--colour-bg);
  color: var(--colour-text);
}

.col-filter:focus-visible {
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
}

/* ── Metrics grid ── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}

.metric-card {
  background: var(--colour-bg-alt);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.metric-card--gold { border: 4px solid #b08800; }
.metric-card--red  { border: 4px solid var(--colour-badge-fail-bg); }

.metric-num {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--colour-accent);
}

.metric-label {
  font-size: 0.875rem;
  color: var(--colour-muted);
}

.failings-list {
  margin: var(--space-md) 0 var(--space-xl);
  padding-left: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}