:root {
  --bg: #ffffff;
  --fg: #1d232a;
  --muted: #5b6672;
  --accent: #1f5f8b;
  --line: #dde3e9;
  --soft: #f4f7fa;
  --maxw: 54rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181d;
    --fg: #e4e8ec;
    --muted: #9aa6b2;
    --accent: #7cb7e3;
    --line: #2c343d;
    --soft: #1b2128;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1rem; }
.muted { color: var(--muted); }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--bg); padding: .5rem; z-index: 10; }

/* En-tête */
.site-header { border-bottom: 1px solid var(--line); }
.header-row { display: flex; align-items: center; justify-content: space-between; padding-top: 1rem; }
.brand { font-weight: 600; font-size: 1.15rem; color: var(--fg); text-decoration: none; }
.lang { display: flex; gap: .5rem; font-size: .9rem; }
.lang span { font-weight: 600; }
nav ul { list-style: none; margin: 0; padding: .5rem 0 .75rem; display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; }
nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
nav a[aria-current="page"] { font-weight: 600; }

/* Contenu */
main { padding: 2rem 0 3rem; }
.prose h1 { font-size: 1.8rem; line-height: 1.25; margin: 0 0 1.25rem; }
.prose h2 { font-size: 1.3rem; margin: 2.25rem 0 .75rem; padding-top: .5rem; border-top: 1px solid var(--line); }
.prose h3 { font-size: 1.08rem; margin: 1.75rem 0 .5rem; }
.prose ul { padding-left: 1.25rem; }
.prose li { margin: .25rem 0; }

.prose table {
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  width: 100%;
  font-size: .92rem;
  margin: 1rem 0 1.5rem;
}
.prose th, .prose td { text-align: left; vertical-align: top; padding: .55rem .7rem; border-bottom: 1px solid var(--line); }
.prose th { background: var(--soft); font-weight: 600; white-space: nowrap; }

/* Accueil */
.home .intro { display: flex; gap: 1.5rem; align-items: center; margin-bottom: 1.5rem; }
.home .photo { width: 140px; height: 140px; border-radius: 50%; object-fit: cover; flex: none; }
.home h1 { font-size: 2rem; margin: 0 0 .25rem; }
.subtitle { margin: 0; color: var(--muted); }
.links { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.5rem; }
.links a { display: inline-block; border: 1px solid var(--line); border-radius: 999px; padding: .25rem .8rem; text-decoration: none; font-size: .9rem; }
.links a:hover { border-color: var(--accent); }
@media (max-width: 560px) {
  .home .intro { flex-direction: column; align-items: flex-start; }
  .home .photo { width: 110px; height: 110px; }
}

/* Publications HAL */
.hal-filters { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1rem 0 1.5rem; }
.hal-filters button {
  font: inherit; font-size: .85rem; cursor: pointer;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--line); border-radius: 999px; padding: .2rem .75rem;
}
.hal-filters button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.prose .hal-year { font-size: 1.1rem; margin: 1.75rem 0 .5rem; border: 0; padding: 0; }
.prose .hal-list { list-style: none; padding: 0; margin: 0; }
.hal-list li { padding: .5rem 0; border-bottom: 1px solid var(--line); }
.hal-type { font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.hal-title { display: block; font-weight: 600; }
.hal-ref { display: block; font-size: .9rem; color: var(--muted); }

/* Pied de page */
.site-footer { border-top: 1px solid var(--line); padding: 1.25rem 0 2rem; font-size: .9rem; }
.site-footer p { margin: .25rem 0; }