:root {
  --bg: #f6f8f7;
  --bg-2: #edf2f0;
  --panel: rgba(255, 255, 255, 0.74);
  --panel-strong: rgba(255, 255, 255, 0.88);
  --text: #1d2326;
  --muted: #617077;
  --line: rgba(29, 35, 38, 0.10);
  --line-strong: rgba(29, 35, 38, 0.18);

  /* Couleur signature */
  --accent: #6f8f8b;         /* vert de gris */
  --accent-strong: #4f6f6b;
  --accent-soft: rgba(111, 143, 139, 0.14);

  --radius: 28px;
  --radius-sm: 18px;
  --shadow: 0 20px 60px rgba(34, 49, 52, 0.08);
  --shadow-soft: 0 8px 30px rgba(34, 49, 52, 0.05);

  --wrap: 1200px;
  --reading: 780px;

  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --display: Inter, ui-sans-serif, system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.9), transparent 28%),
    radial-gradient(circle at top right, rgba(111,143,139,0.06), transparent 22%),
    linear-gradient(180deg, #f9fbfa 0%, #f3f7f5 100%);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: white;
}

a {
  color: inherit;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
}

.wrap {
  width: min(calc(100% - 2rem), var(--wrap));
  margin-inline: auto;
}

/* Fond discret vivant */

.noise {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(29,35,38,0.55) 0.5px, transparent 0.6px),
    radial-gradient(circle at 70% 40%, rgba(29,35,38,0.45) 0.5px, transparent 0.6px),
    radial-gradient(circle at 40% 80%, rgba(29,35,38,0.40) 0.5px, transparent 0.6px);
  background-size: 24px 24px, 28px 28px, 32px 32px;
}

.glow {
  position: fixed;
  top: -220px;
  left: -220px;
  width: 440px;
  height: 440px;
  border-radius: 999px;
  z-index: 0;
  pointer-events: none;
  opacity: 0.22;
  background: radial-gradient(circle, var(--accent-soft) 0%, rgba(255,255,255,0) 68%);
  filter: blur(24px);
  will-change: transform;
}

/* Progress bar */

.progress {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 3px;
  background: rgba(29, 35, 38, 0.05);
}

.progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  box-shadow: 0 0 18px rgba(111, 143, 139, 0.32);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: 1rem;
  background: linear-gradient(to bottom, rgba(246,248,247,0.82), rgba(246,248,247,0));
  backdrop-filter: blur(12px);
}

.header-row {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  min-height: 78px;
  padding: 0.9rem 1.1rem;
  border: 1px solid rgba(255,255,255,0.72);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.76), rgba(255,255,255,0.56)),
    rgba(255,255,255,0.58);
  box-shadow: var(--shadow-soft);
}

.header-row::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0%, rgba(111,143,139,0.08) 50%, transparent 100%);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  padding: 1px;
  mask-composite: exclude;
  -webkit-mask-composite: xor;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: white;
  font-weight: 900;
  font-size: 0.95rem;
  box-shadow: 0 10px 24px rgba(111, 143, 139, 0.18);
}

.brand-text {
  font-family: var(--display);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: self-end;
  justify-content: flex-end;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 2.65rem;
  padding: 0.68rem 0.95rem;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms ease, background 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255,255,255,0.75);
  box-shadow: inset 0 0 0 1px rgba(29,35,38,0.06);
}

.nav-link.is-active {
  color: white;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  font-weight: 700;
  box-shadow: 0 10px 22px rgba(111, 143, 139, 0.18);
}

.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.62);
  color: var(--text);
  border-radius: 14px;
  width: 52px;
  height: 52px;
  padding: 0;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.nav-toggle span + span {
  margin-top: 6px;
}

/* Main */

.main-wrap {
  position: relative;
  z-index: 1;
  padding-top: 3.4rem;
  padding-bottom: 4rem;
}

.paper {
  position: relative;
  padding: clamp(1.2rem, 2vw, 2rem);
  border: 1px solid rgba(255,255,255,0.75);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.82), rgba(255,255,255,0.64)),
    var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.paper::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.48), transparent 18%, transparent 72%, rgba(111,143,139,0.08));
}

.paper::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(111,143,139,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111,143,139,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.16), rgba(0,0,0,0));
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.16), rgba(0,0,0,0));
}

/* Markdown */

.markdown-body {
  font-size: 1.0625rem;
}

.markdown-body > * {
  width: min(100%, var(--reading));
  margin-left: auto;
  margin-right: auto;
}

.markdown-body > :first-child {
  margin-top: 0;
}

.markdown-body > :last-child {
  margin-bottom: 0;
}

/* Headings */

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  color: var(--text);
  line-height: 1.05;
  margin-top: 2.05em;
  margin-bottom: 0.72em;
}

.markdown-body h1 {
  font-family: var(--display);
  font-size: clamp(2.5rem, 7vw, 5.2rem);
  font-weight: 900;
  letter-spacing: -0.055em;
  text-transform: uppercase;
  margin-top: 0;
  margin-bottom: 0.8rem;
  text-wrap: balance;
}

.markdown-body h2 {
  position: relative;
  font-family: var(--display);
  font-size: clamp(1.6rem, 4vw, 2.55rem);
  font-weight: 850;
  letter-spacing: -0.045em;
  text-transform: uppercase;
  padding-left: 1rem;
}

.markdown-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.16em;
  width: 4px;
  height: 0.95em;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
}

.markdown-body h3 {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #415158;
}

/* Lead */

.markdown-body h1 + p {
  font-size: 1.16rem;
  line-height: 1.9;
  color: #52626a;
  max-width: 62ch;
}

/* Text */

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote,
.markdown-body pre,
.markdown-body table,
.markdown-body figure {
  margin-top: 0;
  margin-bottom: 1.35rem;
}

.markdown-body p,
.markdown-body li {
  color: #243035;
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.25rem;
}

.markdown-body li + li {
  margin-top: 0.45rem;
}

.markdown-body strong {
  color: #162025;
  font-weight: 800;
}

.markdown-body em {
  color: #54656d;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid rgba(29,35,38,0.10);
  margin: 2.8rem auto;
  position: relative;
}

.markdown-body hr::after {
  content: "✦";
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -50%);
  padding: 0 0.65rem;
  background: rgba(255,255,255,0.85);
  color: var(--accent);
  font-size: 0.9rem;
}

/* Links */

.markdown-body a {
  color: var(--text);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 1px;
  transition: color 160ms ease, background-size 160ms ease, box-shadow 160ms ease;
}

.markdown-body a:hover {
  color: var(--accent-strong);
  background-size: 100% 2px;
}

/* Blockquote */

.markdown-body blockquote {
  position: relative;
  padding: 1.25rem 1.2rem 1.25rem 1.4rem;
  border: 1px solid rgba(111,143,139,0.18);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background:
    linear-gradient(180deg, rgba(111,143,139,0.07), rgba(255,255,255,0.55)),
    var(--panel-strong);
  color: #324147;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.5);
}

.markdown-body blockquote > :last-child {
  margin-bottom: 0;
}

/* Code */

.markdown-body code {
  font-family: var(--mono);
  font-size: 0.92em;
  color: var(--accent-strong);
  padding: 0.16rem 0.42rem;
  border: 1px solid rgba(111,143,139,0.18);
  border-radius: 0.5rem;
  background: rgba(111,143,139,0.08);
}

.markdown-body pre {
  position: relative;
  padding: 1.15rem;
  overflow: auto;
  border: 1px solid rgba(29,35,38,0.10);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.92), rgba(245,248,247,0.94)),
    #fff;
  color: #203038;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
}

.markdown-body pre::before {
  content: "";
  display: block;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 999px;
  margin-bottom: 0.9rem;
  background: var(--accent);
  box-shadow:
    1.1rem 0 0 rgba(29,35,38,0.18),
    2.2rem 0 0 rgba(29,35,38,0.10);
}

.markdown-body pre code {
  display: block;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
}

/* Images */

.markdown-body img {
  width: 100%;
  height: auto;
  border: 1px solid rgba(29,35,38,0.10);
  border-radius: 22px;
  background: #f5f7f7;
  box-shadow: 0 12px 34px rgba(34,49,52,0.08);
}

.markdown-body figure {
  margin: 2rem auto;
}

.markdown-body figcaption {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Tables */

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid rgba(29,35,38,0.10);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255,255,255,0.62);
  box-shadow: 0 8px 26px rgba(34,49,52,0.04);
}

.markdown-body th,
.markdown-body td {
  padding: 0.95rem 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(29,35,38,0.08);
}

.markdown-body th {
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(111,143,139,0.06);
}

.markdown-body tr:last-child td {
  border-bottom: 0;
}

/* Lists */

.markdown-body ul li::marker {
  color: var(--accent);
}

.markdown-body ol li::marker {
  color: var(--accent-strong);
  font-weight: 700;
}

/* Footer */

.site-footer {
  width: min(100%, var(--reading));
  margin: 1.6rem auto 0;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(29,35,38,0.10);
  color: var(--muted);
  font-size: 0.94rem;
}

.site-footer code {
  font-family: var(--mono);
  font-size: 0.92em;
  color: var(--accent-strong);
  padding: 0.15rem 0.4rem;
  border: 1px solid rgba(111,143,139,0.18);
  border-radius: 0.45rem;
  background: rgba(111,143,139,0.08);
}

/* Mobile */

@media (max-width: 900px) {
  .header-row {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .nav-toggle {
    display: inline-grid;
    place-content: center;
  }

  .nav {
    display: none;
    grid-column: 1 / -1;
    padding-top: 0.5rem;
    justify-content: flex-start;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    border-radius: 14px;
  }

  .nav-open .nav {
    display: flex;
  }

  .nav-open .nav-toggle span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .nav-open .nav-toggle span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(calc(100% - 1rem), var(--wrap));
  }

  .main-wrap {
    padding-top: 2rem;
    padding-bottom: 3rem;
  }

  .paper {
    padding: 1rem;
    border-radius: 22px;
  }

  .markdown-body {
    font-size: 1rem;
  }

  .markdown-body h1 {
    font-size: clamp(2rem, 12vw, 3.4rem);
  }

  .markdown-body h2 {
    font-size: clamp(1.35rem, 7vw, 1.95rem);
    padding-left: 0.85rem;
  }

  .glow {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .glow,
  .progress-bar,
  .nav-link,
  .nav-toggle span,
  .markdown-body a {
    transition: none !important;
  }
}