/* Shared visual system for project detail pages.
   This file changes presentation only: article copy remains in each HTML file. */

@font-face {
  font-family: "Mont Project";
  src: url("../fonts/Montserrat/Montserrat-VariableFont_wght.ttf") format("truetype");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "Mont Project";
  src: url("../fonts/Montserrat/Montserrat-Italic-VariableFont_wght.ttf") format("truetype");
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --project-ink: #101210;
  --project-ink-soft: #30332f;
  --project-paper: #f2f0ea;
  --project-paper-soft: #e8e6df;
  --project-white: #ffffff;
  --project-line: rgba(16, 18, 16, 0.17);
  --project-accent: #cfff44;
  --project-max: 1240px;
}

body {
  margin: 0;
  padding: 0;
  background: var(--project-paper);
  color: var(--project-ink);
  font-family: "Mont Project", Montserrat, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

body::selection {
  background: var(--project-accent);
  color: var(--project-ink);
}

a {
  color: inherit;
}

/* Legacy partial header, brought into the same visual language as the home page. */
#header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 78px;
  background: var(--project-ink);
  color: var(--project-white);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}

#header nav {
  width: min(calc(100% - 48px), var(--project-max));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
}

#header nav > a:first-child {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

#siteLogo {
  width: 38px;
  height: 38px;
  margin: 0;
  object-fit: contain;
  filter: none;
}

#headerTitle {
  margin: 0 auto 0 0;
  color: inherit;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

#navLinks {
  display: flex;
  align-items: center;
  gap: 27px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  font-weight: 650;
}

#navLinks a {
  color: inherit;
  text-decoration: none;
  opacity: 0.78;
  transition: opacity 180ms ease, color 180ms ease;
}

#navLinks a:hover,
#navLinks a:focus-visible {
  color: var(--project-accent);
  opacity: 1;
}

#burger {
  display: none;
  padding: 8px;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

#burger img {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.languageSelector {
  position: relative;
  display: inline-flex;
  margin-left: 5px;
}

#languageButton {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

#languageButton:hover,
#languageButton:focus-visible {
  border-color: var(--project-accent);
  color: var(--project-accent);
}

#languageButton img {
  width: 18px !important;
  height: 18px !important;
}

.language-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 145px;
  padding: 6px;
  border: 1px solid var(--project-line);
  background: var(--project-white);
  box-shadow: 0 14px 30px rgba(16, 18, 16, 0.16);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.language-menu.show {
  display: block;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.language-menu.hide {
  display: block;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
}

.language-menu a {
  display: block;
  padding: 9px 10px;
  color: var(--project-ink);
  font-size: 12px;
  text-decoration: none;
}

.language-menu a:hover,
.language-menu a:focus-visible {
  background: var(--project-paper-soft);
}

/* Article shell */
.presentation {
  width: min(calc(100% - 48px), var(--project-max));
  margin: 0 auto;
  padding: 164px 0 110px;
  text-align: center;
}

.presentation > h1:first-child {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 0 30px;
  border-bottom: 1px solid var(--project-line);
  color: var(--project-ink);
  font-size: clamp(42px, 7vw, 92px);
  font-weight: 600;
  letter-spacing: -0.075em;
  line-height: 0.98;
  text-align: center;
}

.presentation > h1 + h2 {
  max-width: 760px;
  margin: 23px auto 0;
  color: var(--project-ink-soft);
  font-size: clamp(19px, 2.4vw, 30px);
  font-weight: 450;
  letter-spacing: -0.035em;
  line-height: 1.2;
  text-align: center;
}

.presentation .project-diamond {
  color: #000000 !important;
}

.espace-titre {
  height: 58px;
  margin: 0;
}

.presentation h3,
.presentation h4,
.presentation h5,
.presentation h6 {
  color: var(--project-ink);
  text-align: center;
}

.presentation h3 {
  max-width: 980px;
  margin: 82px auto 25px;
  padding-top: 23px;
  border-top: 1px solid var(--project-line);
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 1.05;
}

.presentation h4 {
  max-width: 900px;
  margin: 48px auto 18px;
  font-size: clamp(19px, 2vw, 28px);
  font-weight: 650;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.presentation h5 {
  max-width: 840px;
  margin: 34px auto 12px;
  color: #646960;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.35;
  text-transform: uppercase;
}

.presentation h6 {
  margin: 0 0 9px;
  color: var(--project-ink);
  font-size: 15px;
  font-weight: 750;
  line-height: 1.35;
}

.presentation p,
.presentation li {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  color: var(--project-ink-soft);
  font-size: 16px;
  line-height: 1.78;
  text-align: center;
}

.presentation p {
  margin: 0 auto 22px;
}

.presentation ul,
.presentation ol {
  max-width: 860px;
  margin: 20px 0 30px;
  padding-left: 24px;
  margin-left: auto;
  margin-right: auto;
  list-style-position: inside;
}

.presentation li {
  margin: 0 auto 12px;
  padding-left: 5px;
}

.presentation li p {
  margin: 0 auto 14px;
}

.presentation .listeTimeline,
.presentation .dl_list {
  padding-left: 26px;
}

.presentation .listeTimeline li,
.presentation .dl_list li {
  margin-bottom: 17px;
}

.presentation .legend {
  max-width: 720px;
  margin: -8px auto 30px;
  color: #6d726a;
  font-size: 12px;
  font-style: italic;
  line-height: 1.55;
  text-align: center;
}

/* Figures and embedded media */
.presentation .image,
.presentation .media,
.presentation figure {
  width: 100%;
  max-width: 980px;
  margin: 42px auto 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.presentation .image img,
.presentation .media img,
.presentation figure img,
.presentation > img {
  width: auto;
  max-width: 100%;
  max-height: 620px;
  height: auto;
  margin: 0 auto;
  object-fit: contain;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.presentation .image img[src*="schema"],
.presentation .image img[src*="Schema"],
.presentation .media img {
  max-width: min(100%, 900px);
}

.presentation .svg_image {
  display: block;
  width: min(100%, 980px);
  height: auto;
  margin: 36px auto 44px;
}

.presentation figcaption {
  max-width: 720px;
  color: #6d726a;
  font-size: 12px;
  line-height: 1.55;
  text-align: center;
}

/* Code and math blocks stay legible without changing their contents. */
.presentation pre {
  width: min(100%, 980px);
  margin: 30px auto 38px;
  padding: 22px 24px;
  overflow-x: auto;
  background: #1c211e;
  color: #eff5e9;
  border-left: 3px solid var(--project-accent);
  font-size: 13px;
  line-height: 1.65;
  text-align: left;
  tab-size: 2;
}

.presentation code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.presentation pre code {
  display: block;
  text-align: left;
}

.presentation :not(pre) > code {
  padding: 2px 5px;
  background: var(--project-paper-soft);
  color: var(--project-ink);
  font-size: 0.9em;
}

.presentation .hljs {
  background: #1c211e;
  color: #eff5e9;
}

.presentation .text-blue-600,
.presentation a[href] {
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.presentation a[href]:hover,
.presentation a[href]:focus-visible {
  color: #496600;
}

footer {
  margin: 0;
  padding: 28px 24px;
  background: var(--project-ink);
  color: rgba(255, 255, 255, 0.62);
  font-size: 11px;
  letter-spacing: 0.04em;
  line-height: 1.5;
  text-align: center;
}

/* Keep every article heading and visual centered, including older page variants. */
.presentation h1,
.presentation h2,
.presentation h3,
.presentation h4,
.presentation h5,
.presentation h6,
.presentation .legend,
.presentation figcaption {
  margin-left: auto;
  margin-right: auto;
  text-align: center !important;
}

.presentation .image,
.presentation .media,
.presentation figure {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.presentation img,
.presentation .image img,
.presentation .media img,
.presentation figure img {
  display: block;
  margin-left: auto !important;
  margin-right: auto !important;
}

@media (max-width: 950px) {
  #header nav {
    width: min(calc(100% - 32px), var(--project-max));
  }

  #burger {
    display: inline-flex;
    margin-left: auto;
  }

  #navLinks {
    position: absolute;
    top: 78px;
    right: 16px;
    display: flex;
    width: min(250px, calc(100vw - 32px));
    padding: 10px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--project-white);
    box-shadow: 0 14px 30px rgba(16, 18, 16, 0.16);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  #navLinks.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  #navLinks.closing {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
  }

  #navLinks li a {
    display: block;
    padding: 11px 12px;
    color: var(--project-ink);
    opacity: 1;
  }

  #navLinks li a:hover,
  #navLinks li a:focus-visible {
    background: var(--project-paper-soft);
    color: var(--project-ink);
  }

  .languageSelector {
    margin-left: 0;
  }
}

@media (max-width: 700px) {
  #headerTitle {
    font-size: 14px;
  }

  .languageSelector {
    margin-left: auto;
  }

  #languageButton span {
    display: none;
  }

  .presentation {
    width: min(calc(100% - 32px), var(--project-max));
    padding-top: 132px;
    padding-bottom: 72px;
  }

  .presentation > h1:first-child {
    padding-bottom: 22px;
    font-size: clamp(38px, 12vw, 66px);
  }

  .presentation > h1 + h2 {
    font-size: 20px;
  }

  .espace-titre {
    height: 28px;
  }

  .presentation h3 {
    margin-top: 58px;
    padding-top: 18px;
    font-size: 30px;
  }

  .presentation h4 {
    margin-top: 34px;
    font-size: 22px;
  }

  .presentation p,
  .presentation li {
    font-size: 15px;
    line-height: 1.7;
  }

  .presentation .image,
  .presentation .media,
  .presentation figure {
    margin: 30px auto 36px;
  }

  .presentation pre {
    padding: 16px;
    font-size: 12px;
  }
}