/* Minimal responsive UI — WCAG-oriented contrast & focus (EU / EAA aligned with WCAG 2.1 AA targets) */
:root {
  --color-bg: #f6f7f8;
  --color-surface: #ffffff;
  --color-text: #1b1d1f;
  --color-text-muted: #4a5056;
  --color-border: #dde1e6;
  --color-accent: #0a5f66;
  --color-accent-hover: #084850;
  --color-focus: #0b6efd;
  --shadow-sm: 0 1px 2px rgba(27, 29, 31, 0.06);
  --shadow-md: 0 4px 20px rgba(27, 29, 31, 0.08);
  --radius: 10px;
  --font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --space-xs: 0.35rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --content-max: 72rem;
  --touch-min: 44px;
}

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

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

:focus {
  outline: none;
}

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

.skip-link {
  position: absolute;
  left: var(--space-sm);
  top: -100px;
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-text);
  color: var(--color-bg);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: var(--space-sm);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.site-logo {
  font-weight: 700;
  font-size: clamp(1rem, 0.92rem + 0.35vw, 1.125rem);
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  min-height: var(--touch-min);
  display: inline-flex;
  align-items: center;
}

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

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: var(--touch-min);
  height: var(--touch-min);
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  border-radius: 1px;
}

@media (min-width: 48em) {
  .nav-toggle {
    display: none;
  }
}

.site-nav {
  width: 100%;
  flex-basis: 100%;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}

.site-nav.is-open {
  max-height: 320px;
}

@media (min-width: 48em) {
  .site-nav {
    flex-basis: auto;
    width: auto;
    max-height: none !important;
    overflow: visible;
  }
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: var(--space-sm) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

@media (min-width: 48em) {
  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
    padding: 0;
  }
}

.site-nav__list a {
  display: inline-flex;
  align-items: center;
  min-height: var(--touch-min);
  padding: 0 var(--space-sm);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius);
}

.site-nav__list a:hover {
  color: var(--color-accent);
  background: rgba(10, 95, 102, 0.06);
}

.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-md);
}

.site-footer p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Hero & sections */
.page-hero {
  margin-bottom: var(--space-xl);
  padding: var(--space-lg) var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.page-hero h1 {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
}

.page-hero .lead,
.hero__lead {
  margin: 0;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  color: var(--color-text-muted);
  max-width: 42rem;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 36em) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 62em) {
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.card h2 {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0 0 var(--space-md);
  flex: 1;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.card__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch-min);
  padding: 0.55rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-accent);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  border-color: var(--color-accent);
  background: rgba(10, 95, 102, 0.08);
  color: var(--color-accent-hover);
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}

.store-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.store-links a {
  display: inline-block;
  line-height: 0;
  border-radius: var(--radius);
}

.store-links a:focus-visible {
  border-radius: var(--radius);
}

.store-links img {
  display: block;
  width: 140px;
  max-width: 100%;
  height: auto;
}

.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;
}

/* Content pages */
.content-page h1 {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.5rem, 1.25rem + 0.8vw, 1.75rem);
  font-weight: 700;
}

.content-page .lead {
  margin: 0 0 var(--space-lg);
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

.content-page address {
  margin: 0 0 var(--space-md);
  font-style: normal;
  color: var(--color-text);
}

.content-page a {
  color: var(--color-accent);
  text-underline-offset: 3px;
}

.content-page a:hover {
  color: var(--color-accent-hover);
}

.link-list {
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
}

.link-list li {
  margin-bottom: var(--space-sm);
}

.link-list a {
  font-weight: 600;
}

.doc-links {
  margin-top: var(--space-lg);
}

/* Error page */
.error-panel {
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  max-width: 28rem;
  margin: 0 auto;
}

.error-panel h1 {
  margin: 0 0 var(--space-sm);
  font-size: 1.5rem;
}

.error-panel p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

html.nav-open {
  overflow: hidden;
}

@media (min-width: 48em) {
  html.nav-open {
    overflow: visible;
  }
}

/* ── Dark mode ─────────────────────────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111315;
    --color-surface: #1b1d1f;
    --color-text: #e8eaed;
    --color-text-muted: #9aa0a6;
    --color-border: #3c4043;
    --color-accent: #4cc9d0;
    --color-accent-hover: #7dd8dd;
    --color-focus: #4cc9d0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  }

  .skip-link {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
  }
}

/* ── Windows High Contrast / Forced Colors ─────────────────────────────────── */
@media (forced-colors: active) {
  .btn {
    border: 2px solid ButtonText;
    forced-color-adjust: none;
    background: ButtonFace;
    color: ButtonText;
  }

  .btn:hover,
  .btn:focus-visible {
    background: Highlight;
    color: HighlightText;
    border-color: Highlight;
  }

  .btn--primary {
    background: Highlight;
    color: HighlightText;
    border-color: Highlight;
  }

  .skip-link:focus {
    outline: 3px solid Highlight;
    background: ButtonFace;
    color: ButtonText;
  }

  .site-nav__list a:hover,
  .site-nav__list a:focus-visible {
    forced-color-adjust: none;
    background: Highlight;
    color: HighlightText;
  }

  .site-header,
  .card,
  .page-hero {
    border: 1px solid ButtonText;
  }
}