/* =========================================================================
   Demain, la Biologie — feuille de style principale
   Le fond animé (PC uniquement) vit dans assets/background/ pour rester
   modifiable indépendamment de cette feuille.
   ========================================================================= */

:root {
  /* Palette — jardin / botanique */
  --moss:        #26361B; /* texte principal, titres (olive profond) */
  --fern:        #4C7A3D; /* accent primaire : liens, boutons (vert feuille) */
  --fern-dark:   #3A5F2E;
  --lichen:      #9CB86B; /* accent secondaire : pastilles, survols (jeune pousse) */
  --sage-mist:   #EEF1E1; /* fond des cartes, sections alternées */
  --paper:       #FBF9F3; /* fond de page, papier chaud */
  --clay-warn:   #A85A2A; /* accent d'alerte + terracotta (pot de fleurs) */
  --line:        #DDE3CC;

  /* Typographie */
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Échelle */
  --step-0: 1rem;
  --step-1: 1.25rem;
  --step-2: 1.6rem;
  --step-3: 2.1rem;
  --step-4: 2.8rem;

  --radius: 14px;
  --content-width: 640px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--moss);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Fond mobile : dégradé doux et statique, léger et peu coûteux */
body {
  background-image: radial-gradient(circle at 12% 0%, rgba(156,184,107,0.18), transparent 55%),
                     radial-gradient(circle at 100% 20%, rgba(76,122,61,0.11), transparent 45%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}

a { color: var(--fern); text-decoration-thickness: 1.5px; text-underline-offset: 2px; }
a:hover { color: var(--fern-dark); }

:focus-visible {
  outline: 2.5px solid var(--fern);
  outline-offset: 2px;
  border-radius: 4px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--moss);
  line-height: 1.18;
  font-weight: 560;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}

p { margin: 0 0 1.1em; }

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

/* ---------- Header ---------- */

.site-header {
  padding: 28px 0 18px;
}

.site-header__row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.site-title {
  font-size: var(--step-3);
  margin: 0;
}

.site-title a { color: var(--moss); text-decoration: none; }

.site-tagline {
  font-family: var(--font-body);
  font-style: italic;
  color: var(--fern-dark);
  font-size: 0.95rem;
  margin: 6px 0 0;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 18px 0 0;
}

.breadcrumb a { color: var(--fern-dark); }

/* ---------- Sélecteur de langue ---------- */

.lang-switch {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.lang-switch a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--fern-dark);
  border: 1.5px solid var(--line);
  background: #fff;
  padding: 5px 9px;
  border-radius: 999px;
  line-height: 1;
}

.lang-switch a[aria-current="true"] {
  background: var(--fern);
  border-color: var(--fern);
  color: #fff;
}

.lang-switch a:hover:not([aria-current="true"]) {
  border-color: var(--lichen);
  color: var(--fern-dark);
}

/* ---------- Intro (page d'accueil) ---------- */

.intro {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin: 22px 0 32px;
  box-shadow: 0 1px 2px rgba(31,58,46,0.04);
}

.intro h1 { font-size: var(--step-2); }
.intro :last-child { margin-bottom: 0; }

.hero-image {
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  max-height: 420px; /* filet de sécurité si aspect-ratio n'est pas supporté */
  object-fit: cover;
  border-radius: calc(var(--radius) - 4px);
  margin: 0 0 20px;
  border: 1px solid var(--line);
  overflow: hidden;
}

/* ---------- Sommaire / menu ---------- */

.menu-title {
  font-size: var(--step-1);
  margin: 0 0 4px;
}

.menu-empty {
  color: var(--fern-dark);
  font-style: italic;
}

.article-list {
  list-style: none;
  margin: 14px 0 36px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
  position: relative;
}

.article-card:hover,
.article-card:focus-visible {
  border-color: var(--art-primary, var(--fern));
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(31,58,46,0.08);
}

.article-card__marker {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--art-primary, var(--lichen));
  margin-right: 8px;
  vertical-align: middle;
}

.article-card__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--moss);
  margin: 0 0 4px;
  display: inline;
}

.article-card__excerpt {
  color: #445A4E;
  font-size: 0.92rem;
  margin: 6px 0 10px;
}

.article-card__langs {
  display: flex;
  gap: 6px;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--sage-mist);
  color: var(--fern-dark);
  border: 1px solid var(--line);
}

.pill--muted {
  opacity: 0.45;
}

/* ---------- Article ---------- */

.article {
  background: var(--art-bg, #fff);
  border: 1px solid var(--line);
  border-top: 4px solid var(--art-primary, var(--fern));
  border-radius: var(--radius);
  padding: 28px 24px;
  margin: 20px 0 28px;
  box-shadow: 0 1px 2px rgba(31,58,46,0.04);
}

.article h1 { font-size: var(--step-2); color: var(--art-primary, var(--moss)); }
.article h2 { font-size: var(--step-1); margin-top: 1.4em; }
.article :last-child { margin-bottom: 0; }

.article-byline {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--art-primary, var(--fern-dark));
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: -6px 0 18px;
}

.pill--category {
  background: var(--art-accent, var(--lichen));
  border-color: transparent;
  color: #fff;
  text-transform: none;
  letter-spacing: 0.02em;
}

.notice {
  font-family: var(--font-body);
  font-size: 0.86rem;
  background: var(--sage-mist);
  border-left: 3px solid var(--lichen);
  padding: 10px 14px;
  border-radius: 6px;
  margin: 0 0 20px;
  color: var(--fern-dark);
}

.back-link {
  display: inline-block;
  margin: 4px 0 0;
  font-size: 0.9rem;
}

/* ---------- Disclaimer ---------- */

.disclaimer {
  border: 1px solid #E7D2C0;
  background: #FBF3EC;
  border-left: 3px solid var(--clay-warn);
  border-radius: 10px;
  padding: 16px 18px;
  margin: 10px 0 24px;
}

.disclaimer__title {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
  color: var(--clay-warn);
  margin: 0 0 6px;
  font-weight: 700;
}

.disclaimer p {
  font-size: 0.88rem;
  color: #6B4A34;
  margin: 0;
}

.disclaimer p + p {
  margin-top: 8px;
}

/* ---------- Footer / compteurs ---------- */

.site-footer {
  padding: 18px 0 48px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}

.counters {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--fern-dark);
  margin: 14px 0 10px;
}

.counters strong {
  color: var(--moss);
  font-weight: 700;
}

.footer-note {
  font-size: 0.78rem;
  color: #6E8478;
}

/* ---------- Non trouvé ---------- */

.not-found {
  padding: 60px 0;
  text-align: center;
}

/* =========================================================================
   Version « confortable » PC : largeur augmentée + fond animé (ambiance)
   ========================================================================= */

@media (min-width: 860px) {
  :root { --content-width: 760px; }

  body { font-size: 17px; }

  .site-title { font-size: var(--step-4); }

  .intro, .article {
    padding: 40px 48px;
  }

  .article-card {
    padding: 20px 24px;
  }

  /* Le fond dégradé mobile est neutralisé : le canevas animé prend le relais
     (voir assets/background/background.css) */
  body { background-image: none; }
}

@media (prefers-reduced-motion: reduce) {
  .article-card { transition: none; }
}

/* Filet de sécurité pour les très vieux navigateurs sans support de "gap"
   en flexbox (Safari < 14.1, Chrome < 84...). Scopé via @supports pour ne
   jamais s'additionner au gap sur les navigateurs qui le supportent. */
@supports not (gap: 1px) {
  .lang-switch > * + *,
  .article-card__langs > * + *,
  .article-byline > * + * {
    margin-left: 6px;
  }
  .counters > * + * {
    margin-left: 18px;
  }
}