/* ==========================================================================
   SCIAM DESIGN v2.0 — Guides de formation
   Ivoire #fbf9f6 · Encre #16100e · Clay #314163 · Pierre #f8f6f3
   DM Serif Text (titres) · DM Sans (texte) · Geist Mono (code)
   ========================================================================== */

:root {
  color-scheme: light;

  /* Surfaces */
  --ivory: #fbf9f6;
  --stone: #f8f6f3;
  --stone-deep: #f2efea;

  /* Texte */
  --ink: #16100e;
  --warm-gray: #504c49;

  /* Accent */
  --clay: #314163;
  --clay-deep: #26334e;
  --clay-tint: #eceff5;

  /* États */
  --error: #b32322;

  /* Traits */
  --line: rgba(22, 16, 14, 0.12);
  --line-soft: rgba(22, 16, 14, 0.07);

  /* Rayons */
  --radius: 6px;
  --radius-panel: 12px;

  /* Élévation */
  --shadow-card: 0 1px 3px 0 rgba(22, 16, 14, 0.08);

  /* Typographie */
  --font-display: "DM Serif Text", Georgia, "Times New Roman", serif;
  --font-sans: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-padding-top: 6rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "kern" 1;
  -webkit-font-smoothing: antialiased;
}

/* --- Liens ---------------------------------------------------------------- */

a {
  color: var(--clay);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 200ms ease, background-color 200ms ease, border-color 200ms ease;
}
a:hover { color: var(--clay-deep); text-decoration-thickness: 2px; }
a:focus-visible {
  outline: 3px solid var(--clay);
  outline-offset: 2px;
  border-radius: var(--radius);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -6rem;
  z-index: 20;
  padding: 0.7rem 1rem;
  background: var(--clay);
  color: var(--ivory);
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}
.skip-link:focus { top: 0.75rem; }

/* --- En-tête -------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem max(1.5rem, calc((100vw - 1180px) / 2));
  background: var(--ivory);
  border-bottom: 1px solid var(--line);
}
@supports (backdrop-filter: blur(12px)) {
  .site-header {
    background: color-mix(in srgb, var(--ivory) 72%, transparent);
    backdrop-filter: blur(12px);
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
}
.brand img {
  width: 104px;
  height: auto;
  display: block;
}
.brand span {
  padding-left: 0.85rem;
  border-left: 1px solid var(--line);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--warm-gray);
  white-space: nowrap;
}
.brand:hover span { color: var(--ink); }

.header-link {
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.5rem 0.9rem;
  border: 1px solid color-mix(in srgb, var(--ink) 25%, transparent);
  border-radius: var(--radius);
  white-space: nowrap;
}
.header-link:hover {
  border-color: color-mix(in srgb, var(--ink) 60%, transparent);
  background: color-mix(in srgb, var(--ink) 4%, transparent);
}

/* --- Ossature ------------------------------------------------------------- */

.shell {
  display: grid;
  grid-template-columns: 264px minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  max-width: 1180px;
  margin: 0 auto;
}

/* --- Barre latérale ------------------------------------------------------- */

.sidebar {
  padding: 3rem 0 3rem 1.5rem;
  align-self: start;
  position: sticky;
  top: 5rem;
}
.sidebar > p:not(.eyebrow):not(.sidebar-note) {
  font-family: var(--font-display);
  font-size: 1.375rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0.5rem 0 0;
}

.eyebrow {
  margin: 0;
  color: var(--clay);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.33;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.sidebar nav {
  display: grid;
  gap: 0.15rem;
  margin: 1.75rem 0;
}
.sidebar nav a {
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  font-size: 0.9375rem;
}
.sidebar nav a:hover { background: color-mix(in srgb, var(--ink) 5%, transparent); }
.sidebar nav a[aria-current="page"] {
  background: var(--clay);
  color: var(--ivory);
  font-weight: 500;
}

.sidebar-note {
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--warm-gray);
}

/* --- Contenu -------------------------------------------------------------- */

main {
  min-width: 0;
  padding: 3rem clamp(1.25rem, 3vw, 2rem) 4rem 0;
}
main > article > * { max-width: 46rem; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--ink);
}
h1 {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
  margin: 0.75rem 0 1.25rem;
  text-wrap: balance;
}
h2 {
  font-size: clamp(1.625rem, 3vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 3rem 0 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line);
}
h3 {
  font-size: 1.3125rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 2rem 0 0.75rem;
}
h4 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  margin: 1.5rem 0 0.5rem;
}

.lead {
  font-size: 1.1875rem;
  line-height: 1.5;
  color: var(--warm-gray);
  text-wrap: pretty;
}

p { text-wrap: pretty; }
strong { font-weight: 500; color: var(--ink); }
ul, ol { padding-left: 1.25rem; }
li { margin: 0.45rem 0; }
li::marker { color: var(--warm-gray); }

hr {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 2.5rem 0;
}

blockquote {
  margin: 1.75rem 0;
  padding: 1rem 1.25rem;
  background: var(--stone);
  border-left: 3px solid var(--clay);
  border-radius: 0 var(--radius-panel) var(--radius-panel) 0;
  color: var(--ink);
}
blockquote > :first-child { margin-top: 0; }
blockquote > :last-child { margin-bottom: 0; }

/* --- Code ----------------------------------------------------------------- */

code {
  font-family: var(--font-mono);
  font-size: 0.8125em;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
:not(pre) > code {
  padding: 0.15em 0.4em;
  background: var(--stone-deep);
  border-radius: 4px;
}
pre {
  margin: 1.25rem 0;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  background: var(--stone);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-panel);
}
pre code { overflow-wrap: normal; }
div.highlight { margin: 1.25rem 0; }
.highlight pre { margin: 0; }

/* Coloration syntaxique Rouge — palette chaude SCIAM */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs { color: #8c837e; font-style: italic; }
.highlight .cp { color: #8c837e; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt, .highlight .kc { color: #314163; font-weight: 500; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sr { color: #4c6b45; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il { color: #9a5423; }
.highlight .nf, .highlight .nd, .highlight .nb { color: #6b4a2f; }
.highlight .nc, .highlight .nn, .highlight .no, .highlight .vc, .highlight .vg, .highlight .vi { color: #16100e; font-weight: 500; }
.highlight .nt { color: #314163; }
.highlight .na, .highlight .nv { color: #6b4a2f; }
.highlight .o, .highlight .ow, .highlight .p { color: #504c49; }
.highlight .err { color: var(--error); }
.highlight .gd { color: #b32322; background: rgba(179, 35, 34, 0.07); }
.highlight .gi { color: #3f6b45; background: rgba(63, 107, 69, 0.07); }
.highlight .gh, .highlight .gu { color: #504c49; font-weight: 500; }
.highlight .ge { font-style: italic; }
.highlight .gs { font-weight: 500; }

/* --- Tableaux ------------------------------------------------------------- */

table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.9375rem;
  margin: 1.75rem 0;
}
th, td {
  text-align: left;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  background: var(--stone);
  font-weight: 500;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--warm-gray);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }

/* --- Navigation de bas de page -------------------------------------------- */

.page-navigation {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  max-width: 46rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.page-navigation a {
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--stone);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}
.page-navigation a:hover {
  background: var(--clay-tint);
  border-color: color-mix(in srgb, var(--clay) 35%, transparent);
  box-shadow: var(--shadow-card);
}
.page-navigation a:last-child:only-child { margin-left: auto; }

main > footer {
  max-width: 46rem;
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--warm-gray);
}

/* --- Responsive ----------------------------------------------------------- */

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0;
  }
  .sidebar {
    position: static;
    padding: 1.25rem 1.25rem 1.5rem;
    background: var(--stone);
    border-bottom: 1px solid var(--line);
  }
  .sidebar > p:not(.eyebrow), .sidebar-note { display: none; }
  .sidebar nav {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.35rem;
    margin: 0.75rem 0 0;
    font-size: 0.875rem;
  }
  .sidebar nav a { background: var(--ivory); border: 1px solid var(--line-soft); }
  main { padding: 2rem 1.25rem 3rem; }
  .site-header { padding: 0.85rem 1.25rem; }
  .brand img { width: 88px; }
  .brand span { display: none; }
}

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

/* --- Impression ----------------------------------------------------------- */

@media print {
  body { background: white; font-size: 11pt; }
  .site-header, .sidebar, .page-navigation, .skip-link { display: none; }
  .shell { display: block; max-width: none; padding: 0; }
  main { padding: 0; }
  main > article > *, .page-navigation, main > footer { max-width: none; }
  a { color: var(--ink); text-decoration: none; }
  pre { white-space: pre-wrap; background: #f5f5f5; }
  table { display: table; font-size: 9pt; }
  h1, h2, h3 { break-after: avoid; }
  blockquote, pre, table { break-inside: avoid; }
}