:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-synthesis: none;
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
  --dur-fast: 150ms;
  --dur: 260ms;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
  scroll-padding-top: 1.5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.skip {
  position: fixed;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 0.8rem;
  z-index: 30;
  border-radius: 4px;
}

.skip:focus {
  top: 1rem;
}

.announcement {
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  padding: 0.55rem 4vw;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}

.site-shell {
  width: min(100%, 1280px);
  margin: 0 auto;
  padding: 0 4vw;
}

.breadcrumb {
  margin: 0 0 2rem;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.breadcrumb span[aria-current="true"] {
  color: var(--ink);
  font-weight: 600;
}

.breadcrumb[hidden] {
  display: none;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(1.8rem, 3.5vw, 2.6rem);
  display: grid;
  grid-template-columns: 1fr minmax(12rem, 30rem) auto;
  align-items: start;
  gap: 2rem;
  position: relative;
  background-image: linear-gradient(to right, transparent 0%, color-mix(in srgb, var(--ink) 10%, transparent) 15%, color-mix(in srgb, var(--ink) 10%, transparent) 85%, transparent 100%);
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: bottom;
}

.wordmark {
  color: inherit;
  text-decoration: none;
  font-weight: 650;
  font-size: clamp(1.2rem, 1.8vw, 1.55rem);
  letter-spacing: -0.03em;
}

.site-header > p {
  margin: 0;
  text-align: right;
  color: color-mix(in srgb, var(--muted) 88%, var(--ink));
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: 1.5;
  text-wrap: balance;
}

.section-menu-toggle {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  display: flex;
  gap: 0.4rem;
  align-items: center;
  padding: 0.2rem 0;
  cursor: pointer;
  font-size: 0.9rem;
  transition: transform var(--dur-fast) var(--ease);
}

.section-menu-icon { display: none; }
.section-menu-toggle::before, .section-menu-toggle::after { content: ""; display: block; width: 14px; height: 1.5px; background: currentColor; transition: transform var(--dur-fast) var(--ease); }
.section-menu-toggle::before { margin-bottom: 3px; }
.section-menu-toggle:hover {
  color: var(--accent);
}

.section-menu {
  position: absolute;
  right: 0;
  top: clamp(3.5rem, 6vw, 5.5rem);
  z-index: 4;
  width: min(24rem, calc(100vw - 2rem));
  padding: 1rem;
  background: var(--paper);
  border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  border-radius: 6px;
  box-shadow: 0 8px 24px color-mix(in srgb, var(--ink) 8%, transparent);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.section-menu:not([hidden]) {
  opacity: 1;
  transform: none;
}

.section-menu[hidden] {
  display: none;
}

.section-menu p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.section-menu li + li {
  border-top: 1px solid color-mix(in srgb, var(--ink) 10%, transparent);
}

.section-menu a {
  display: flex;
  gap: 0.75rem;
  padding: 0.5rem 0 0.5rem calc(var(--menu-depth) * 1rem + 0.75rem);
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}

.section-menu a[aria-current="true"] {
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--accent);
}

.section-menu a:hover {
  color: var(--ink);
  transform: translateX(2px);
}

.section-menu li ul a {
  font-size: 0.85rem;
  color: color-mix(in srgb, var(--muted) 85%, var(--ink));
}

/* ==========================================================================
   Folds & Accordions
   ========================================================================== */
.fold {
  opacity: 0.5;
  transition: opacity var(--dur-fast) var(--ease);
}

.fold[open] {
  opacity: 1;
}

.fold[open] > summary {
  position: relative;
}

.fold[open] > summary::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--ink);
  opacity: 0.12;
  pointer-events: none;
}

.fold:last-child {
  border-bottom: none;
}

.fold summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(1.05rem, 2vw, 1.6rem) 0;
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.025em;
  user-select: none;
  transition: color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}

.fold-title {
  flex: 1;
  min-width: 0;
}

.fold > summary:hover {
  color: var(--accent);
  transform: translateX(2px);
}

.fold summary::-webkit-details-marker {
  display: none;
}

.fold summary:focus-visible {
  outline: none;
}

.fold-mark {
  width: 1rem;
  height: 1rem;
  position: relative;
  flex: 0 0 auto;
}

.fold-mark:before,
.fold-mark:after {
  content: "";
  position: absolute;
  background: currentColor;
  left: 0;
  top: 50%;
  width: 100%;
  height: 1.5px;
}

.fold-mark:after {
  transform: rotate(90deg);
  transition: transform var(--dur-fast) var(--ease);
}

.fold[open] > summary .fold-mark:after {
  transform: rotate(0);
}

.fold-body {
  padding: 0.4rem 0 clamp(1rem, 2vw, 2rem);
  max-width: 65rem;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.fold[open] > .fold-body {
  opacity: 1;
}

@supports selector(::details-content) {
  details::details-content {
    overflow: clip;
    block-size: 0;
    transition: block-size var(--dur) var(--ease), content-visibility var(--dur) var(--ease) allow-discrete;
  }
  details[open]::details-content {
    block-size: auto;
  }
}

/* ==========================================================================
   Blocks
   ========================================================================== */
.block {
  margin: 0 0 1.2rem;
}

.text {
  max-width: 65ch;
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
  line-height: 1.65;
}

.text[data-align="center"] {
  margin-inline: auto;
  text-align: center;
}

.text p {
  margin: 0 0 1em;
  text-wrap: pretty;
}

.links {
  display: flex;
  flex-direction: column;
  max-width: 36rem;
}

.links a {
  position: relative;
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  padding: 0.7rem 0;
  display: flex;
  justify-content: space-between;
}

.links a span {
  display: inline-block;
  transition: transform var(--dur) var(--ease);
}

.links a:hover span,
.links a:focus-visible span {
  transform: translate(2px, -2px);
}

.links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 1px;
  width: 0;
  background: currentColor;
  transition: width var(--dur) var(--ease);
}

.links a:hover,
.links a:focus-visible {
  color: var(--ink);
}

.links a:hover::after,
.links a:focus-visible::after {
  width: 100%;
}

.gallery {
  display: flex;
  gap: clamp(0.5rem, 1vw, 0.85rem);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: x proximity;
  padding-bottom: 0.5rem;
  scrollbar-width: thin;
}

.gallery figure {
  margin: 0;
  flex: 0 0 min(68vw, 36rem);
  scroll-snap-align: start;
}

.gallery-photo {
  display: block;
  width: 100%;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: zoom-in;
  overflow: hidden;
  border-radius: 4px;
}

.gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 4/3;
  height: auto;
  object-fit: cover;
  border-radius: 0;
  background: #e9e9e4;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.gallery img.is-loaded {
  opacity: 1;
}

.gallery figcaption,
figure > figcaption {
  font-size: 0.76rem;
  color: var(--muted);
  margin-top: 0.4rem;
}

.gallery-wrap {
  position: relative;
}

.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.3rem 0.55rem;
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.gallery-wrap:hover .gallery-nav { opacity: .6; }
.gallery-nav:hover {
  color: var(--accent);
  opacity: 1;
}

.gallery-wrap:hover .gallery-nav:focus-visible, .gallery-nav:focus-visible {
  opacity: 1;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.gallery-prev {
  left: 0.2rem;
}

.gallery-next {
  right: 0.2rem;
}

.gallery-lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--lb-bg, color-mix(in srgb, var(--paper) 94%, transparent));
  backdrop-filter: none;
  opacity: 0;
  transform: scale(0.98);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background 0.8s ease;
}

.gallery-lightbox.is-open {
  opacity: 1;
  transform: none;
}

.gallery-lightbox[hidden] {
  display: none;
}

.lightbox-frame {
  margin: auto;
  max-width: min(78vw, 68rem);
  text-align: center;
  transition: transform var(--dur-fast) ease-out;
  will-change: transform;
}

.lightbox-frame.dragging {
  transition: none;
}

.lightbox-frame img {
  display: block;
  max-width: 100%;
  max-height: 80vh;
  margin: auto;
  object-fit: contain;
  border-radius: 4px;
  transition: opacity var(--dur) var(--ease);
}

.lightbox-frame img.lb-loading {
  opacity: 0;
}

.lightbox-frame p {
  margin: 0.7rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.lightbox-close,
.lightbox-nav {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 1.8rem;
  cursor: pointer;
  padding: 8px;
}

.lightbox-close {
  position: absolute;
  right: 1.25rem;
  top: 0.75rem;
}

.lightbox-nav:disabled {
  opacity: 0.25;
  cursor: default;
}

.nested {
  margin-top: 1.2rem;
  padding-left: clamp(1rem, 3vw, 3rem);
  border-left: 1px solid color-mix(in srgb, var(--ink) 10%, transparent);
}

.nested .fold summary {
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 500;
  padding: clamp(0.7rem, 1.4vw, 1rem) 0;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

caption {
  text-align: left;
  margin-bottom: 0.8rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.82rem;
}

th, td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
}

th {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form {
  max-width: 36rem;
}

.form label {
  display: block;
  margin-bottom: 1.1rem;
}

.form label span {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  font-weight: 500;
}

.form input,
.form textarea,
.form select {
  appearance: none;
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  border-radius: 4px;
  background: transparent;
  color: inherit;
  padding: 0.65rem 0.8rem;
  font: inherit;
  font-size: 0.9rem;
}

.form textarea {
  min-height: 7rem;
  resize: vertical;
}

.form button {
  border: 0;
  border-radius: 4px;
  background: var(--ink);
  color: var(--paper);
  padding: 0.7rem 1.1rem;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.form button:active {
  transform: scale(0.98);
}

.form button .ripple {
  position: absolute;
  border-radius: 50%;
  background: color-mix(in srgb, var(--paper) 30%, transparent);
  pointer-events: none;
  transform: scale(0);
  animation: ripple-expand 0.5s ease-out forwards;
}

@keyframes ripple-expand {
  to { transform: scale(1); opacity: 0; }
}

.form-status {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 0 3rem;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: none;
  background-image: linear-gradient(to right, transparent 0%, color-mix(in srgb, var(--ink) 8%, transparent) 20%, color-mix(in srgb, var(--ink) 8%, transparent) 80%, transparent 100%);
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: top;
  margin-top: 2.5rem;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

footer a {
  position: relative;
  color: inherit;
  text-decoration: none;
}

.footer-social-link { width: 28px; height: 28px; display: inline-grid; place-items: center; border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent); border-radius: 50%; }
.footer-social-link::after { display: none; }
.footer-social-icon { width: 15px; height: 15px; margin: 0; }
.footer-social-link:hover, .footer-social-link:focus-visible { border-color: color-mix(in srgb, var(--ink) 42%, transparent); }

footer a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 1px;
  width: 0;
  background: currentColor;
  transition: width var(--dur) var(--ease);
}

footer a:hover,
footer a:focus-visible {
  color: var(--ink);
}

footer a:hover::after,
footer a:focus-visible::after {
  width: 100%;
}

.system-page {
  min-height: 75vh;
  padding: 3rem 0;
  max-width: 46rem;
}

.system-page .back {
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
}

.system-page h1 {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin: 2.5rem 0 1.5rem;
}

.video video {
  max-width: 100%;
  border-radius: 4px;
}

[data-font="editorial"] .site-header,
[data-font="editorial"] summary,
[data-font="editorial"] .system-page h1 {
  font-family: Georgia, "Times New Roman", serif;
}

[data-font="mono"] {
  font-family: "SFMono-Regular", Consolas, monospace;
}

[data-density="compact"] .fold summary {
  padding: 0.7rem 0;
}

@media (max-width: 700px) {
  .site-shell {
    padding: 0 1.2rem;
  }
  .site-header {
    display: block;
    padding: 1.8rem 0;
  }
  .site-header > p {
    text-align: left;
    margin-top: 1rem;
  }
  .section-menu-toggle {
    position: absolute;
    right: 0;
    top: 1.8rem;
  }
  .section-menu {
    top: 4rem;
  }

  .gallery figure {
    flex-basis: 84%;
  }
  .gallery-lightbox {
    padding: 1rem 0.25rem;
    gap: 0.25rem;
  }
  .lightbox-frame {
    max-width: 88vw;
  }
  .nested {
    padding-left: 0.8rem;
  }
  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}

/* ==========================================================================
   Scroll reveal (classe ajoutée par site.js — contenu visible sans JS)
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

.block.reveal.in {
  transition-delay: calc(var(--i, 0) * 60ms);
}

/* ==========================================================================
   Focus Visible
   ========================================================================== */
.gallery-photo:focus-visible,
.links a:focus-visible,
.form input:focus-visible,
.form textarea:focus-visible,
.form select:focus-visible,
.form button:focus-visible,
footer a:focus-visible,
.lightbox-close:focus-visible,
.lightbox-nav:focus-visible,
.section-menu-toggle:focus-visible,
.section-menu a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

::selection {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
}

@media print {
  .toc,
  .section-menu,
  .section-menu-toggle,
  .progress,
  .breadcrumb,
  .gallery-lightbox,
  footer nav,
  .announcement {
    display: none !important;
  }
  .fold {
    border: none;
    background-image: none;
  }
  details::details-content {
    block-size: auto !important;
  }
  .fold-body {
    opacity: 1 !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
  .gallery {
    overflow: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .fold-mark:after {
    transition: none;
  }
  .gallery-lightbox {
    backdrop-filter: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .gallery img {
    opacity: 1;
  }
  .section-menu {
    transform: none;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}