/* Palette centralisée : modifier ces variables pour changer l'apparence du site. */
:root {
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-alt: #eef5f6;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-accent: #0f766e;
  --color-accent-secondary: #99f6e4;
  --color-accent-dark: #115e59;
  --color-accent-soft: #e6fffb;
  --color-toc-panel: #ffffff;
  --color-border: #dbe3ec;
  --color-header: #0f172a;
  --color-header-text: #e2e8f0;
  --color-header-muted: #94a3b8;
  --color-header-border: #334155;
  --color-hero-end: #164e63;
  --color-hero-text: #f8fafc;
  --color-hero-muted: #cbd5e1;
  --color-meta: #bae6fd;
  --color-table-head: #e2e8f0;
  --color-input-border: #94a3b8;
  --color-warning: #f59e0b;
  --color-warning-bg: #fffbeb;
  --color-on-dark: #ffffff;
  --color-on-accent: #ffffff;
  --rail-width: 260px;
  --content-max: 900px;
  --shadow: 0 12px 30px rgba(15, 23, 42, .08);
  --header-height: 76px;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
}
body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-background);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--color-accent-dark); }
a:hover { color: var(--color-accent); }
.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 20;
  padding: .6rem .9rem;
  color: var(--color-on-accent);
  background: var(--color-accent-dark);
}
.skip-link:focus { left: 1rem; top: 1rem; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  color: var(--color-header-text);
  background: var(--color-header);
}
.nav-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 1240px;
  min-height: var(--header-height);
  margin: auto;
  padding: .75rem 1.25rem;
}
.brand { display: flex; align-items: center; gap: .65rem; color: var(--color-on-dark); text-decoration: none; line-height: 1.15; }
.brand-mark { display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border-radius: .5rem; color: var(--color-header); background: var(--color-accent-secondary); font-weight: 800; }
.brand-text { font-weight: 700; }
.brand-text small { display: block; margin-top: .25rem; color: var(--color-header-muted); font-size: .72rem; font-weight: 400; }
.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .35rem .7rem; margin-left: auto; }
.site-nav a { margin-left: .7rem; color: var(--color-hero-muted); text-decoration: none; font-size: .9rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--color-on-dark); text-decoration: underline; text-underline-offset: .2em; }
.nav-toggle { display: none; }
.container { width: min(1100px, calc(100% - 2rem)); margin-inline: auto; }
.page-hero, .cover { padding: 4rem 0 3rem; color: var(--color-hero-text); background: linear-gradient(135deg, var(--color-header), var(--color-hero-end)); }
.page-hero h1, .cover h1 { max-width: 850px; margin: .3rem 0 .6rem; font-size: clamp(2rem, 5vw, 3.8rem); line-height: 1.1; }
.page-hero p:last-child, .cover .subtitle { max-width: 760px; margin: 0; color: var(--color-hero-muted); font-size: 1.12rem; }
.breadcrumb { color: var(--color-accent-secondary); font-size: .9rem; }
.breadcrumb a { color: inherit; }
.eyebrow { color: var(--color-accent); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.cover .eyebrow { color: var(--color-accent-secondary); }
.meta { color: var(--color-meta); font-size: .9rem; }
.section { padding: 3rem 0; }
.section-alt { background: var(--color-surface-alt); }
.section h2, .reading h2 { margin-top: 0; color: var(--color-header); line-height: 1.25; }
.reading .section p, .reading .section ol, .reading .section h2, .reading .section h3 { max-width: 900px; }
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { padding: 1.25rem; border: 1px solid var(--color-border); border-radius: .8rem; background: var(--color-surface); box-shadow: var(--shadow); }
.dossier-card { color: inherit; text-decoration: none; }
.dossier-card:hover { border-color: var(--color-accent-secondary); transform: translateY(-1px); }
.dossier-card h3 { color: var(--color-accent-dark); margin: .5rem 0; }
.small { color: var(--color-text-muted); font-size: .9rem; }
.badge { color: var(--color-accent-dark); font-size: .75rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.filter-bar { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; }
.filter-bar label { display: grid; gap: .35rem; font-weight: 700; }
input[type="search"] { width: min(480px, 100%); padding: .7rem .8rem; border: 1px solid var(--color-input-border); border-radius: .45rem; font: inherit; }
.btn { display: inline-block; padding: .65rem 1rem; border-radius: .45rem; text-decoration: none; }
.btn-primary { color: var(--color-on-accent); background: var(--color-accent-dark); }
.footer { padding: 2rem 0; color: var(--color-hero-muted); background: var(--color-header); }
.footer a { color: var(--color-accent-secondary); }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--color-header-border); font-size: .85rem; }
table { width: 100%; border-collapse: collapse; background: var(--color-surface); }
th, td { padding: .75rem; border: 1px solid var(--color-border); vertical-align: top; text-align: left; }
th { color: var(--color-header); background: var(--color-table-head); }
.table-wrap { overflow-x: auto; }

/* The dossier rail is structural: it stays reserved whether the TOC is visible or hidden. */
.dossier-page { --rail-width: 260px; }
.dossier-page .cover,
.dossier-page .dossier-introduction,
.dossier-page .dossier-welcome,
.dossier-page .dossier-content {
  width: calc(100% - 280px);
  max-width: var(--content-max);
  margin-left: 280px;
  margin-right: 0;
}
.dossier-page .cover {
  padding: 3rem 1rem 2.5rem;
}
.dossier-page .dossier-introduction,
.dossier-page .dossier-welcome,
.dossier-page .dossier-content { padding-top: 2rem; padding-bottom: 2rem; }
.dossier-page .dossier-content { min-width: 0; }
.dossier-page .dossier-content h2,
.dossier-page .dossier-content h3,
.dossier-page .dossier-content [id],
.dossier-page .dossier-warning[id],
.dossier-page .dossier-introduction [id],
.dossier-page .dossier-welcome [id] {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}
.dossier-page .dossier-content h2 { margin-top: 2.5rem; }
.dossier-page .dossier-content h2:first-child { margin-top: 0; }
.dossier-page .dossier-content table { margin: 1.25rem 0 2rem; }
.toc-toggle {
  position: fixed;
  top: calc(var(--header-height) + .75rem);
  left: 1rem;
  z-index: 5;
  width: calc(var(--rail-width) - 2rem);
  padding: .7rem .8rem;
  border: 1px solid var(--color-accent-secondary);
  border-radius: .45rem;
  color: var(--color-accent-soft);
  background: var(--color-accent-dark);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.toc-toggle:hover { background: var(--color-accent-dark); }
.toc-panel {
  position: fixed;
  top: calc(var(--header-height) + 4.75rem);
  bottom: 1rem;
  left: 1rem;
  z-index: 4;
  width: calc(var(--rail-width) - 2rem);
  overflow: auto;
  padding: .8rem;
  border: 1px solid var(--color-border);
  border-radius: .55rem;
  background: var(--color-toc-panel, var(--color-surface));
  box-shadow: var(--shadow);
  font-size: .8rem;
  line-height: 1.35;
}
.toc-panel[hidden] { display: none; }
.toc-panel strong { color: var(--color-accent-dark); }
.toc-panel ol { margin: .55rem 0 0; padding-left: 1.2rem; }
.toc-panel li { margin: .3rem 0; }
.toc-panel a { text-decoration: none; }
.toc-panel a:hover { text-decoration: underline; }
.dossier-warning { margin: 2rem 0; padding: 1rem 1.25rem; border-left: 4px solid var(--color-warning); background: var(--color-warning-bg); }
.summary-popover { position: relative; margin-top: 1rem; padding: 1rem 3rem 1rem 1rem; border: 1px solid var(--color-accent-secondary); border-radius: .6rem; background: var(--color-accent-soft); }
.summary-popover[aria-hidden="true"] { display: none; }
.summary-close { position: absolute; top: .4rem; right: .6rem; border: 0; background: transparent; font-size: 1.5rem; cursor: pointer; }

@media (max-width: 900px) {
  .nav-wrap { flex-wrap: wrap; }
  .nav-toggle { display: block; margin-left: auto; padding: .45rem .7rem; border: 1px solid var(--color-text-muted); border-radius: .4rem; color: var(--color-header-text); background: transparent; font: inherit; }
  .site-nav { display: none; width: 100%; margin-left: 0; }
  .site-nav[data-open="true"] { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); padding-top: .75rem; }
  .grid-2, .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .dossier-page { --rail-width: 0px; }
  .dossier-page .cover,
  .dossier-page .dossier-introduction,
  .dossier-page .dossier-welcome,
  .dossier-page .dossier-content {
    width: calc(100% - 2rem);
    margin-left: 1rem;
    margin-right: 1rem;
  }
  .dossier-page .cover { width: 100%; margin: 0; padding-inline: 1rem; }
  .toc-toggle { position: static; display: block; width: calc(100% - 2rem); margin: 1rem; color: var(--color-on-accent); background: var(--color-accent-dark); }
  .toc-panel { position: static; width: calc(100% - 2rem); max-height: 18rem; margin: 0 1rem 1rem; }
  .dossier-content table { display: block; max-width: 100%; overflow-x: auto; }
  .filter-bar { align-items: stretch; flex-direction: column; }
  .footer-bottom { flex-direction: column; }
  th, td { min-width: 12rem; }
}
.anchor-target { display: block; width: 0; height: 0; overflow: hidden; }
[id] { scroll-margin-top: calc(var(--header-height) + 1rem); }