/* Pierre Brasseur — feuille de style unique.
   Noir et blanc, typographie d'abord, aucune dépendance externe. */

:root {
  --paper: #ffffff;
  --ink: #101010;
  --muted: #5f5f5f;
  --faint: #8a8a8a;
  --rule: #e4e4e4;
  --rule-strong: #c8c8c8;
  --wash: #f6f6f6;

  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, "Iowan Old Style",
    "Palatino Linotype", Georgia, serif;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter,
    "Helvetica Neue", Arial, sans-serif;

  --measure: 40rem;
  --gap: clamp(1.25rem, 4vw, 2.5rem);
  --step: clamp(3rem, 8vw, 5.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0d0d0d;
    --ink: #ededed;
    --muted: #a3a3a3;
    --faint: #7d7d7d;
    --rule: #262626;
    --rule-strong: #3d3d3d;
    --wash: #161616;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.02rem, 0.98rem + 0.2vw, 1.14rem);
  line-height: 1.68;
  font-kerning: normal;
  font-variant-numeric: oldstyle-num;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ---------- structure ---------- */

.wrap {
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: var(--gap);
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.9rem;
  font-family: var(--sans);
  font-size: 0.85rem;
}

/* ---------- en-tête ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  padding-block: 1.6rem 1.2rem;
  margin-bottom: var(--step);
}

.masthead__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem 1.5rem;
}

.wordmark {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}
.wordmark:hover { text-decoration: none; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.15rem;
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.nav a:hover { color: var(--ink); border-bottom-color: var(--rule-strong); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }

/* ---------- titraille ---------- */

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.18;
  text-wrap: balance;
}

.page-title {
  font-size: clamp(2rem, 1.3rem + 3vw, 3.1rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
}

.standfirst {
  font-size: 1.12em;
  color: var(--muted);
  margin: 0 0 2.6rem;
  max-width: 34rem;
}

h2 {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: var(--step) 0 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}

h2 .count {
  float: right;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

h3 {
  font-size: 1.06em;
  margin: 2.2rem 0 0.5rem;
}

p { margin: 0 0 1.15rem; }

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--rule-strong);
  transition: text-decoration-color 0.12s ease;
}
a:hover { text-decoration-color: currentColor; }

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

strong { font-weight: 600; }
em { font-style: italic; }

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: var(--step) 0;
}

/* ---------- listes ---------- */

ul.plain, ol.plain {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
}
ul.plain > li { margin-bottom: 0.75rem; }

/* liste de références : renfoncement suspendu */
.biblio {
  list-style: none;
  margin: 0;
  padding: 0;
}
.biblio > li {
  padding-left: 1.6em;
  text-indent: -1.6em;
  margin-bottom: 1.05rem;
  line-height: 1.55;
}
.biblio > li[hidden] { display: none; }

.biblio .yr {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.biblio .venue { font-style: italic; }

.biblio a.src {
  font-family: var(--sans);
  font-size: 0.74em;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
  text-decoration-color: transparent;
  white-space: nowrap;
  margin-left: 0.35em;
}
.biblio a.src:hover { color: var(--ink); text-decoration-color: currentColor; }

.tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.68em;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 0.05em 0.4em;
  margin-left: 0.4em;
  vertical-align: 0.12em;
  text-indent: 0;
}

/* ---------- filtres publications ---------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 1rem;
  padding: 0;
}
.filters[hidden] { display: none; }

.filters button {
  font-family: var(--sans);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 100px;
  padding: 0.34rem 0.85rem;
  cursor: pointer;
  transition: border-color 0.12s ease, color 0.12s ease;
}
.filters button:hover { color: var(--ink); border-color: var(--rule-strong); }
.filters button[aria-pressed="true"] {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

/* ---------- blocs ---------- */

.lede {
  font-size: 1.16em;
  line-height: 1.55;
  margin-bottom: 1.6rem;
}

.note {
  font-size: 0.92em;
  color: var(--muted);
  border-left: 2px solid var(--rule-strong);
  padding: 0.1rem 0 0.1rem 1.1rem;
  margin: 2rem 0;
}

.cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.2rem 2.5rem;
}

.card {
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}
.card h3 { margin-top: 0; }
.card p { margin-bottom: 0; color: var(--muted); font-size: 0.95em; }

/* liste descriptive : parcours, cours, identifiants */
.rows { margin: 0; }
.rows > div {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 0.3rem 1.5rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--rule);
  align-items: baseline;
}
.rows dt {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.rows dd { margin: 0; }
.rows dd small { display: block; color: var(--muted); font-size: 0.88em; }

@media (max-width: 34rem) {
  .rows > div { grid-template-columns: 1fr; gap: 0.15rem; }
}

/* ---------- liens de profil ---------- */

.ids {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  padding: 0;
  margin: 0 0 2.6rem;
  list-style: none;
}
.ids a { color: var(--muted); text-decoration-color: var(--rule); }
.ids a:hover { color: var(--ink); }

/* ---------- pied de page ---------- */

.foot {
  margin-top: var(--step);
  border-top: 1px solid var(--rule);
  padding: 1.6rem 0 3.5rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--faint);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}
.foot a { color: var(--muted); text-decoration-color: var(--rule); }
.foot a:hover { color: var(--ink); }

/* ---------- impression ---------- */

@media print {
  :root { --paper: #fff; --ink: #000; --muted: #333; --rule: #bbb; }
  .masthead, .foot, .filters, .skip, .toc, .post-nav { display: none; }
  body { font-size: 10.5pt; line-height: 1.4; }
  .wrap { max-width: none; padding: 0; }
  h2 { page-break-after: avoid; }
  .biblio > li { page-break-inside: avoid; margin-bottom: 0.5rem; }
  a { text-decoration: none; }
  a.src { display: none; }
}

/* ---------- pages de cours ---------- */

.crumb {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--faint);
  margin: 0 0 0.9rem;
}
.crumb a { color: var(--muted); text-decoration-color: var(--rule); }
.crumb a:hover { color: var(--ink); }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.4rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.85rem 0;
  margin: 0 0 2.6rem;
  list-style: none;
}
.meta b { color: var(--ink); font-weight: 500; }

/* séances numérotées */
.seances { list-style: none; margin: 0; padding: 0; counter-reset: s; }
.seances > li {
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 0.2rem 1rem;
  border-top: 1px solid var(--rule);
  padding: 1rem 0;
}
.seances > li::before {
  content: counter(s, decimal-leading-zero);
  counter-increment: s;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
  padding-top: 0.28em;
}
.seances h3 { margin: 0 0 0.2rem; font-size: 1em; }
.seances p { margin: 0; color: var(--muted); font-size: 0.94em; }
.seances .refs {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--sans);
  font-size: 0.76rem;
  color: var(--faint);
}
.seances .kind {
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 0.05em 0.4em;
  margin-left: 0.45em;
  vertical-align: 0.15em;
}

@media (max-width: 34rem) {
  .seances > li { grid-template-columns: 1fr; }
  .seances > li::before { padding-top: 0; }
}

/* bloc de téléchargement */
.dl {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--sans);
  font-size: 0.82rem;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 0.5rem 0.9rem;
  text-decoration: none;
  color: var(--ink);
  margin: 0 0.4rem 0.5rem 0;
}
.dl:hover { border-color: var(--ink); }
.dl span { color: var(--faint); font-variant-numeric: tabular-nums; }

/* ---------- bandeau de profil (accueil) ---------- */

.profile {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0 2rem;
  align-items: start;
  margin-bottom: var(--step);
}

/* Le fichier est déjà en niveaux de gris : pas de filtre CSS. */
.portrait {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
}

.profile .page-title { margin-top: 0; }
.profile .standfirst { margin-bottom: 1.2rem; }

.affil {
  list-style: none;
  margin: 0 0 1.1rem;
  padding: 0;
  font-size: 0.95em;
  color: var(--muted);
}
.affil li { margin-bottom: 0.3rem; }

.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.9rem;
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--muted);
}
/* Séparateur accroché à l'élément précédent : au retour à la ligne,
   le point reste en fin de ligne au lieu de l'ouvrir. */
.interests li:not(:last-child)::after {
  content: "·";
  color: var(--faint);
  margin-left: 0.9rem;
}

.profile .ids { margin-bottom: 0; }

@media (max-width: 34rem) {
  .profile { grid-template-columns: 1fr; gap: 1.5rem; }
  .portrait { max-width: 10rem; }
}

/* ---------- carnet ---------- */

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

.posts > li {
  border-top: 1px solid var(--rule);
  padding: 1.5rem 0;
}
.posts > li[hidden] { display: none; }

.post-meta {
  font-family: var(--sans);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
  margin: 0 0 0.45rem;
}
.post-meta .cat { letter-spacing: 0.1em; text-transform: uppercase; }

/* Annule la titraille de section : ici le h2 est un titre d'œuvre. */
.post-title {
  font-family: var(--serif);
  font-size: 1.22em;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--ink);
  border-top: 0;
  padding-top: 0;
  margin: 0 0 0.45rem;
}
.post-title a { text-decoration-color: transparent; }
.post-title a:hover { text-decoration-color: var(--rule-strong); }

.post-sum { margin: 0; color: var(--muted); font-size: 0.96em; }

/* ---------- billet ---------- */

.toc {
  font-family: var(--sans);
  font-size: 0.84rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.75rem 1.05rem;
  margin: 0 0 2.4rem;
}
.toc summary {
  cursor: pointer;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}
.toc ol { margin: 0.8rem 0 0.2rem; padding-left: 1.3rem; }
.toc li { margin-bottom: 0.35rem; color: var(--muted); }
.toc a { color: var(--muted); text-decoration-color: var(--rule); }
.toc a:hover { color: var(--ink); }

.post-body h2 {
  font-family: var(--serif);
  font-size: 1.18em;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
  border-top: 0;
  padding-top: 0;
  margin: 2.6rem 0 0.7rem;
}

.post-body ul, .post-body ol { margin: 0 0 1.15rem; padding-left: 1.35rem; }
.post-body li { margin-bottom: 0.45rem; }

.post-body blockquote {
  margin: 1.9rem 0;
  padding-left: 1.2rem;
  border-left: 2px solid var(--rule-strong);
  color: var(--muted);
}
.post-body blockquote p:last-child { margin-bottom: 0; }

.post-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--wash);
  border-radius: 2px;
  padding: 0.1em 0.35em;
}

.post-body hr { margin: 2.6rem 0 1.7rem; }

.post-foot {
  margin-top: var(--step);
  border-top: 1px solid var(--rule);
  padding-top: 1.2rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.tags li {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.2em 0.5em;
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem 2rem;
  margin-top: 2.6rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.2rem;
  font-family: var(--sans);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--faint);
}
.post-nav a { text-decoration: none; color: var(--faint); }
.post-nav a:hover { color: var(--ink); }
.post-nav a:hover b { text-decoration-color: var(--rule-strong); }
.post-nav b {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.3;
  color: var(--ink);
}
.post-nav .next { text-align: right; }

@media (max-width: 34rem) {
  .post-nav { grid-template-columns: 1fr; }
  .post-nav .next { text-align: left; }
}