:root {
  /* Palette claire et sombre Doorstep */
  --bg-light: #f8fafc;
  --bg-dark: #0b0f19;
  --surface-light: #ffffff;
  --surface-dark: #111827;
  --surface-subtle-light: #f1f5f9;
  --surface-subtle-dark: #1e293b;
  --border-light: #e2e8f0;
  --border-dark: #1e293b;
  --text-primary-light: #0f172a;
  --text-primary-dark: #f8fafc;
  --text-secondary-light: #475569;
  --text-secondary-dark: #94a3b8;
  --brand-light: #4f46e5;
  --brand-dark: #818cf8;
  --emerald-light: #059669;
  --emerald-dark: #34d399;
  --cyan-light: #0891b2;
  --cyan-dark: #22d3ee;

  /* Valeurs par défaut (fallback navigateurs sans light-dark()) */
  --bg: var(--bg-light);
  --surface: var(--surface-light);
  --surface-subtle: var(--surface-subtle-light);
  --border: var(--border-light);
  --text-primary: var(--text-primary-light);
  --text-secondary: var(--text-secondary-light);
  --brand: var(--brand-light);
  --emerald: var(--emerald-light);
  --cyan: var(--cyan-light);

  @media (prefers-color-scheme: dark) {
    --bg: var(--bg-dark);
    --surface: var(--surface-dark);
    --surface-subtle: var(--surface-subtle-dark);
    --border: var(--border-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --brand: var(--brand-dark);
    --emerald: var(--emerald-dark);
    --cyan: var(--cyan-dark);
  }

  &:has(> head > meta[name="color-scheme"][content="dark"]),
  &[data-theme="dark"] {
    color-scheme: dark;
    --bg: var(--bg-dark);
    --surface: var(--surface-dark);
    --surface-subtle: var(--surface-subtle-dark);
    --border: var(--border-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --brand: var(--brand-dark);
    --emerald: var(--emerald-dark);
    --cyan: var(--cyan-dark);
  }

  &:has(> head > meta[name="color-scheme"][content="light"]),
  &[data-theme="light"] {
    color-scheme: light;
    --bg: var(--bg-light);
    --surface: var(--surface-light);
    --surface-subtle: var(--surface-subtle-light);
    --border: var(--border-light);
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --brand: var(--brand-light);
    --emerald: var(--emerald-light);
    --cyan: var(--cyan-light);
  }

  @supports (color: light-dark(white, black)) {
    --bg: light-dark(var(--bg-light), var(--bg-dark));
    --surface: light-dark(var(--surface-light), var(--surface-dark));
    --surface-subtle: light-dark(var(--surface-subtle-light), var(--surface-subtle-dark));
    --border: light-dark(var(--border-light), var(--border-dark));
    --text-primary: light-dark(var(--text-primary-light), var(--text-primary-dark));
    --text-secondary: light-dark(var(--text-secondary-light), var(--text-secondary-dark));
    --brand: light-dark(var(--brand-light), var(--brand-dark));
    --emerald: light-dark(var(--emerald-light), var(--emerald-dark));
    --cyan: light-dark(var(--cyan-light), var(--cyan-dark));
  }

  color-scheme: light dark;
  accent-color: var(--brand);
}

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

body {
  margin: 0;
  min-height: 100dvh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 1.25rem 1.15rem 3.5rem;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.15rem;
  padding: 0.25rem 0.15rem;
}

.brand-identity {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo-svg {
  width: 2.65rem;
  height: 2.65rem;
  aspect-ratio: 1 / 1;
  flex-shrink: 0;
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.22rem;
}

.brand-title {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1;
  color: var(--cyan);
  text-transform: uppercase;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 0.18rem;
  flex-shrink: 0;
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.32rem 0.65rem;
  border-radius: 0.45rem;
  cursor: pointer;
}

.lang-btn[aria-pressed="true"] {
  background-color: var(--surface-subtle);
  color: var(--brand);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

.hero-banner {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.1rem;
  padding: 1.4rem 1.45rem;
  margin-bottom: 1.25rem;
}

.badge-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.24rem 0.62rem;
  border-radius: 999px;
  background-color: var(--surface-subtle);
  color: var(--brand);
  border: 1px solid var(--border);
}

.badge-emerald {
  color: var(--emerald);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.35rem, 1rem + 2.2vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.hero-lead {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.legal-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.4rem 1.45rem;
  margin-bottom: 1rem;
}

.legal-card h2 {
  margin: 0 0 0.6rem;
  font-size: 1.12rem;
  color: var(--text-primary);
}

.legal-card p,
.legal-card ul {
  margin: 0.5rem 0 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.legal-card ul {
  padding-left: 1.25rem;
}

.legal-card li + li {
  margin-top: 0.35rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card-link:hover {
  border-color: var(--brand);
  transform: translateY(-2px);
}

.card-link h2 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
  color: var(--brand);
}

.card-link p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.site-footer {
  max-width: 820px;
  margin: 0 auto;
  padding: 1.5rem 1.15rem 3rem;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-footer a {
  color: var(--brand);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}