/* =========================================================
   Delta — feuille de style unique
   Principe : un rail chronologique à gauche, des dates en
   monospace, un marqueur coloré par laboratoire. Tout le
   reste reste silencieux.
   ========================================================= */

:root {
  --papier:      #ECEEF1;
  --surface:     #F8F9FB;
  --encre:       #15171D;
  --encre-doux:  #5C6373;
  --rail:        #C9CED6;
  --accent:      #2F27C4;

  --display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --serif:   "Source Serif 4", Georgia, serif;
  --mono:    "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  --largeur:   46rem;
  --colonne:   5rem;   /* largeur du rail de dates */
  --ecart:     1.75rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --papier:     #0F1116;
    --surface:    #161A21;
    --encre:      #E5E8EE;
    --encre-doux: #969DAC;
    --rail:       #2A303A;
    --accent:     #9F98FF;
  }
}

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

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

body {
  margin: 0;
  background: var(--papier);
  color: var(--encre);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.evitement {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
  z-index: 10;
}
.evitement:focus { left: 0; }

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

/* ---------- Bandeau ------------------------------------- */

.bandeau {
  border-bottom: 1px solid var(--rail);
}

.bandeau__interieur,
.page,
.pied__interieur {
  max-width: var(--largeur);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.bandeau__interieur {
  padding-top: 3.5rem;
  padding-bottom: 1.75rem;
}

.bandeau__titre {
  display: inline-block;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.5rem, 9vw, 3.75rem);
  letter-spacing: -0.045em;
  line-height: 0.95;
  text-decoration: none;
}

.bandeau__accroche {
  margin: 0.75rem 0 0;
  max-width: 32rem;
  color: var(--encre-doux);
  font-size: 1rem;
  line-height: 1.5;
}

/* ---------- Filtres par laboratoire --------------------- */

.filtres {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 2.5rem;
  padding-bottom: 0.5rem;
}

.filtre {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--encre-doux);
  border: 1px solid var(--rail);
  padding: 0.3rem 0.7rem;
  transition: color 0.15s, border-color 0.15s;
}

.filtre:hover { color: var(--encre); border-color: var(--encre-doux); }

.filtre.est-actif {
  color: var(--papier);
  background: var(--encre);
  border-color: var(--encre);
}

/* ---------- Le journal : rail + entrées ------------------ */

.journal { padding-top: 2.75rem; }

.entree {
  display: grid;
  grid-template-columns: var(--colonne) 1fr;
}

.entree__date {
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.3;
  text-align: right;
  padding-right: var(--ecart);
  padding-top: 0.2rem;
  color: var(--encre-doux);
  font-variant-numeric: tabular-nums;
}

.entree__jour {
  display: block;
  color: var(--encre);
  font-weight: 500;
}

.entree__annee {
  display: block;
  font-size: 0.6875rem;
  opacity: 0.7;
}

.entree__corps {
  position: relative;
  border-left: 1px solid var(--rail);
  padding-left: var(--ecart);
  padding-bottom: 3.25rem;
}

/* Le marqueur posé sur le rail : c'est lui qui porte la couleur du labo */
.entree__corps::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 0.45rem;
  width: 7px;
  height: 7px;
  background: var(--teinte, var(--rail));
}

.entree:last-child .entree__corps { padding-bottom: 1.5rem; }

.jeton {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--teinte, var(--encre-doux));
  text-decoration: none;
  margin-bottom: 0.4rem;
}

.entree__titre {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.35rem, 3.6vw, 1.75rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

.entree__titre a {
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.25s ease;
}

.entree__titre a:hover { background-size: 100% 1px; }

.entree__chapeau {
  margin: 0 0 0.7rem;
  color: var(--encre-doux);
  font-size: 1rem;
}

.meta {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--encre-doux);
  margin: 0;
}

/* ---------- Page article -------------------------------- */

.retour {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--encre-doux);
  text-decoration: none;
  padding-top: 2.5rem;
}

.retour:hover { color: var(--encre); }

.article__entete {
  padding-top: 1.75rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--rail);
}

.article__titre {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2rem, 6.5vw, 3rem);
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin: 0.35rem 0 0.9rem;
}

.article__chapeau {
  font-size: 1.1875rem;
  line-height: 1.5;
  color: var(--encre-doux);
  margin: 0 0 1.25rem;
  max-width: 34rem;
}

.prose {
  max-width: 34rem;
  padding-top: 2.25rem;
  font-size: 1.125rem;
  line-height: 1.72;
}

.prose > p { margin: 0 0 1.35rem; }

.prose h2,
.prose h3 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 2.75rem 0 0.85rem;
}

.prose h2 { font-size: 1.5rem; }
.prose h3 { font-size: 1.1875rem; }

.prose ul,
.prose ol { margin: 0 0 1.35rem; padding-left: 1.25rem; }
.prose li { margin-bottom: 0.45rem; }

.prose a {
  color: var(--encre);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1.5px;
}

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

.prose blockquote {
  margin: 1.75rem 0;
  padding-left: 1.25rem;
  border-left: 2px solid var(--accent);
  font-style: italic;
  color: var(--encre-doux);
}

.prose blockquote p { margin: 0; }

.prose pre {
  background: var(--surface);
  border: 1px solid var(--rail);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.35rem;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.875em;
}

.prose :not(pre) > code {
  background: var(--surface);
  border: 1px solid var(--rail);
  padding: 0.08em 0.35em;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--rail);
  margin: 2.5rem 0;
}

/* ---------- Sources -------------------------------------- */

.sources {
  max-width: 34rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rail);
}

.sources__titre {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--encre-doux);
  margin: 0 0 0.9rem;
}

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

.sources__liste li {
  margin-bottom: 0.6rem;
  font-size: 0.9375rem;
  line-height: 1.45;
}

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

.sources__liste a:hover { text-decoration-color: var(--accent); }

.sources__domaine {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--encre-doux);
  display: block;
}

/* ---------- Étiquettes ----------------------------------- */

.etiquettes {
  max-width: 34rem;
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.etiquette {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: var(--encre-doux);
  text-decoration: none;
  border-bottom: 1px solid var(--rail);
  padding-bottom: 1px;
}

.etiquette:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Navigation entre articles -------------------- */

.voisins {
  max-width: 34rem;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rail);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.voisin { text-decoration: none; }

.voisin__role {
  display: block;
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--encre-doux);
  margin-bottom: 0.3rem;
}

.voisin__titre {
  font-family: var(--display);
  font-weight: 500;
  font-size: 0.9375rem;
  line-height: 1.3;
}

.voisin:hover .voisin__titre { color: var(--accent); }

.voisin.est-suivant { text-align: right; }

/* ---------- Écran vide ----------------------------------- */

.vide {
  padding: 4rem 0;
  max-width: 30rem;
}

.vide__titre {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.vide p { margin: 0; color: var(--encre-doux); }

/* ---------- Pied ----------------------------------------- */

.pied {
  border-top: 1px solid var(--rail);
  margin-top: 5rem;
}

.pied__interieur {
  padding-top: 2rem;
  padding-bottom: 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: baseline;
}

.pied__mention {
  margin: 0;
  max-width: 30rem;
  font-size: 0.875rem;
  color: var(--encre-doux);
}

.pied__liens {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* ---------- Mobile --------------------------------------- */

@media (max-width: 40rem) {
  .entree { grid-template-columns: 1fr; }

  .entree__date {
    text-align: left;
    padding-right: 0;
    padding-left: var(--ecart);
    padding-top: 0;
    margin-bottom: 0.15rem;
  }

  .entree__jour,
  .entree__annee { display: inline; font-size: 0.75rem; }

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

  .entree__corps { padding-bottom: 2.5rem; }

  .voisins { grid-template-columns: 1fr; }
  .voisin.est-suivant { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}