/* =========================================================
   llmoptimisation.fr — Système partagé
   Tokens, base, nav, footer, boutons, scroll-reveal, a11y.
   ========================================================= */

:root{
  --ink:        #0a1416;
  --ink-2:      #0e1a1d;
  --cream:      #f4f0e8;
  --cream-mute: #cfc8b8;
  --cream-dim:  #8a8478;
  --teal:       #9ec9bd;
  --teal-deep:  #6fa39a;
  --rule:       rgba(244, 240, 232, 0.14);
  --rule-soft:  rgba(244, 240, 232, 0.07);

  --serif: "Source Serif 4", "Source Serif Pro", "Iowan Old Style", Georgia, serif;
  --sans:  "Geist", "Söhne", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --maxw: 1240px;
  --gut: clamp(20px, 4vw, 56px);
}

*,*::before,*::after{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background: var(--ink);
  color: var(--cream);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection{ background: var(--teal); color: var(--ink); }
a{ color: inherit; text-decoration: none; }
img{ max-width:100%; display:block; }

/* --- Accessibilité --- */
.skip{
  position: absolute; left: -9999px; top: 0;
  background: var(--cream); color: var(--ink);
  padding: 10px 14px; font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase; z-index: 999;
}
.skip:focus{ left: 12px; top: 12px; }
:focus-visible{
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --- Type system --- */
.serif{ font-family: var(--serif); font-weight: 400; letter-spacing: -0.012em; }
.serif-it{ font-family: var(--serif); font-style: italic; font-weight: 400; }
.mono{ font-family: var(--mono); font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; font-size: 11px; }
.eyebrow{
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--teal);
}
.eyebrow .dot{ color: var(--cream-dim); margin: 0 0.5em; }
.kicker-rule{ display:flex; align-items:center; gap:16px; margin: 0 0 28px; }
.kicker-rule::after{ content:""; flex:1; height:1px; background: var(--rule); }

.section-title{
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(34px, 4.6vw, 64px); line-height: 1.04;
  letter-spacing: -0.02em; margin: 0;
  font-variation-settings: "opsz" 48;
}
.section-title em{ font-style: italic; color: var(--teal); font-weight: 400; }
.section-title .br{ display: block; }

/* --- Layout --- */
.wrap{ max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gut); }
section{ padding: clamp(80px, 10vw, 140px) 0; border-top: 1px solid var(--rule); }
section:first-of-type{ border-top: 0; }

/* --- NAV --- */
.nav{
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner{ display:flex; align-items:center; justify-content:space-between; height: 64px; }
.brand{ display:inline-flex; align-items:baseline; gap:10px; font-family: var(--serif); font-size: 18px; letter-spacing: -0.01em; }
.brand .glyph{ font-family: var(--serif); font-style: italic; color: var(--teal); font-size: 22px; line-height: 1; font-weight: 500; }
.brand .dom{ color: var(--cream); }
.brand .tld{ color: var(--cream-dim); }
.nav ul{ list-style:none; padding:0; margin:0; display:flex; gap: 28px; }
.nav ul a{ font-size: 14px; color: var(--cream-mute); transition: color .2s ease; }
.nav ul a:hover, .nav ul a[aria-current="page"]{ color: var(--cream); }
.nav ul a[aria-current="page"]{ position: relative; }
.nav ul a[aria-current="page"]::after{
  content:""; position:absolute; left:0; right:0; bottom:-22px;
  height:1px; background: var(--teal);
}
.nav-right{ display:flex; align-items:center; gap: 18px; }
.lang{
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  color: var(--cream-dim); border: 1px solid var(--rule);
  padding: 6px 9px; border-radius: 2px;
}
.lang:hover{ color: var(--cream); border-color: var(--cream-mute); }

/* --- Buttons --- */
.btn{
  display:inline-flex; align-items:center; gap: 10px;
  font-family: var(--sans); font-weight: 500; font-size: 14px;
  padding: 14px 22px; border-radius: 2px; border: 1px solid transparent;
  transition: all .18s ease; cursor: pointer; text-decoration: none;
}
.btn .arr{ font-family: var(--serif); font-style: italic; transform: translateY(-1px); }
.btn-primary{ background: var(--cream); color: var(--ink); }
.btn-primary:hover{ background: #fff; }
.btn-ghost{ background: transparent; color: var(--cream); border-color: var(--cream-mute); }
.btn-ghost:hover{ border-color: var(--cream); background: rgba(244,240,232,0.04); }
.btn-sm{ padding: 9px 14px; font-size: 13px; }

/* --- BREADCRUMBS --- */
.crumbs{
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cream-dim);
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
  margin-bottom: 36px;
}
.crumbs a{ color: var(--cream-mute); }
.crumbs a:hover{ color: var(--cream); }
.crumbs .sep{ color: var(--cream-dim); }
.crumbs [aria-current]{ color: var(--cream); }

/* --- PROSE (pages article) --- */
.prose{ max-width: 760px; font-size: 17px; line-height: 1.72; color: var(--cream-mute); }
.prose h2{
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(28px, 3.2vw, 40px); line-height: 1.15;
  letter-spacing: -0.015em; color: var(--cream);
  margin: 64px 0 18px; font-variation-settings: "opsz" 36;
}
.prose h2:first-child{ margin-top: 0; }
.prose h2 em{ font-style: italic; color: var(--teal); font-weight: 400; }
.prose h3{
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(20px, 1.6vw, 24px); line-height: 1.3;
  color: var(--cream); margin: 36px 0 12px; letter-spacing: -0.01em;
}
.prose p{ margin: 0 0 20px; }
.prose p strong{ color: var(--cream); font-weight: 500; }
.prose p em{ color: var(--teal); font-family: var(--serif); font-style: italic; }
.prose a{
  color: var(--cream);
  background-image: linear-gradient(to top, var(--teal) 0, var(--teal) 1.5px, transparent 1.5px);
  background-repeat: no-repeat; background-position: 0 100%;
  background-size: 100% 2px; transition: color .2s ease;
}
.prose a:hover{ color: var(--teal); }
.prose ul, .prose ol{ margin: 0 0 24px; padding-left: 22px; }
.prose li{ margin-bottom: 10px; }
.prose li::marker{ color: var(--teal); }
.prose blockquote{
  font-family: var(--serif); font-style: italic;
  font-size: clamp(20px, 2vw, 26px); line-height: 1.4;
  color: var(--cream); margin: 36px 0;
  padding-left: 24px; border-left: 2px solid var(--teal);
}
.prose code, .prose .tag{
  font-family: var(--mono); font-size: 13px;
  background: rgba(244,240,232,0.06); color: var(--cream);
  padding: 2px 7px; border-radius: 2px;
  border: 1px solid var(--rule);
}
.prose figure{ margin: 36px 0; }
.prose figcaption{
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cream-dim); margin-top: 10px;
}
.prose hr{ border: 0; border-top: 1px solid var(--rule); margin: 56px 0; }

/* --- PAGE HEADER (TOFU/MOFU/BOFU) --- */
.page-head{
  padding-top: clamp(48px, 7vw, 96px);
  padding-bottom: clamp(56px, 7vw, 96px);
  border-bottom: 1px solid var(--rule);
}
.page-head h1{
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(40px, 6vw, 88px); line-height: 1;
  letter-spacing: -0.025em; margin: 0 0 28px;
  color: var(--cream); max-width: 16ch;
  font-variation-settings: "opsz" 60;
}
.page-head h1 em{ font-style: italic; color: var(--teal); font-weight: 400; }
.page-head .lede{
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(19px, 1.6vw, 23px); line-height: 1.5;
  color: var(--cream-mute); max-width: 720px; margin: 0 0 36px;
}
.page-head .lede strong{ color: var(--cream); font-weight: 500; }
.page-head .meta{
  display: flex; gap: 28px; flex-wrap: wrap; align-items: center;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cream-dim);
  padding-top: 28px; border-top: 1px solid var(--rule);
}
.page-head .meta span strong{ color: var(--cream); font-weight: 500; }

/* --- TOC --- */
.toc{
  position: sticky; top: 96px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--cream-dim);
}
.toc h4{
  margin: 0 0 18px; color: var(--teal); font-weight: 500;
  font-size: 11px;
}
.toc ol{ list-style: none; padding: 0; margin: 0; counter-reset: toc; }
.toc li{ counter-increment: toc; margin-bottom: 12px; padding-left: 28px; position: relative; line-height: 1.4; }
.toc li::before{
  content: counter(toc, decimal-leading-zero);
  position: absolute; left: 0; top: 0; color: var(--cream-dim);
}
.toc a{ color: var(--cream-mute); transition: color .2s ease; }
.toc a:hover, .toc a.active{ color: var(--cream); }
.toc a.active::after{ content:" ←"; color: var(--teal); }

/* --- FOOTER --- */
footer{
  border-top: 1px solid var(--rule);
  padding: clamp(64px, 8vw, 100px) 0 56px;
}
.foot-cols{
  display:grid; grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: clamp(32px, 4vw, 64px);
  margin-bottom: clamp(56px, 7vw, 88px);
}
.foot-brand .brand{ margin-bottom: 18px; }
.foot-brand p{ font-size: 14px; line-height: 1.55; color: var(--cream-mute); max-width: 320px; margin: 0; }
.foot-col h4{
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--teal);
  margin: 0 0 18px; font-weight: 500;
}
.foot-col ul{ list-style:none; padding:0; margin:0; }
.foot-col li{ margin-bottom: 11px; }
.foot-col a{ font-size: 14.5px; color: var(--cream-mute); font-family: var(--serif); transition: color .2s ease; }
.foot-col a:hover{ color: var(--cream); }
.foot-base{
  display:flex; align-items:center; justify-content:space-between;
  padding-top: 32px; border-top: 1px solid var(--rule);
  font-size: 13px; color: var(--cream-dim); flex-wrap: wrap; gap: 16px;
}
.foot-base .tagline{ font-family: var(--serif); font-style: italic; }
.foot-base .stack{ font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; }
.foot-base .stack span{ color: var(--cream-mute); }
.foot-base .stack .sep{ color: var(--cream-dim); margin: 0 10px; }

/* --- SCROLL REVEAL (sober) --- */
[data-reveal]{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].in{ opacity: 1; transform: none; }

/* --- Responsive --- */
@media (max-width: 980px){
  .nav ul{ display: none; }
  .nav ul a[aria-current="page"]::after{ display: none; }
  .foot-cols{ grid-template-columns: 1fr 1fr; }
  .foot-base{ flex-direction: column; align-items: flex-start; }
  .toc{ position: static; }
}
@media (max-width: 600px){
  .foot-cols{ grid-template-columns: 1fr; }
}

/* --- Motion safety --- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal]{ opacity: 1 !important; transform: none !important; }
}

/* === Menu mobile (ajout port Astro, absent du design v2 d'origine) === */
.nav-burger{
  display:none; align-items:center; justify-content:center;
  width:40px; height:40px; padding:0; margin-left:4px;
  background:transparent; border:1px solid var(--rule); border-radius:2px;
  color:var(--cream); cursor:pointer;
}
.nav-burger span{ display:block; width:18px; height:1.5px; background:var(--cream); position:relative; transition:transform .2s ease, opacity .2s ease; }
.nav-burger span::before,.nav-burger span::after{ content:""; position:absolute; left:0; width:18px; height:1.5px; background:var(--cream); transition:transform .2s ease, top .2s ease; }
.nav-burger span::before{ top:-6px; }
.nav-burger span::after{ top:6px; }
.nav-burger[aria-expanded="true"] span{ background:transparent; }
.nav-burger[aria-expanded="true"] span::before{ top:0; transform:rotate(45deg); }
.nav-burger[aria-expanded="true"] span::after{ top:0; transform:rotate(-45deg); }
.nav-mobile{
  display:none; border-top:1px solid var(--rule);
  background: color-mix(in srgb, var(--ink) 96%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
}
.nav-mobile.open{ display:block; }
.nav-mobile ul{ list-style:none; margin:0; padding:8px var(--gut) 16px; }
.nav-mobile li{ border-bottom:1px solid var(--rule-soft); }
.nav-mobile li:last-child{ border-bottom:0; }
.nav-mobile a{ display:block; padding:14px 0; font-size:16px; color:var(--cream-mute); transition:color .2s ease; }
.nav-mobile a:hover,.nav-mobile a[aria-current="page"]{ color:var(--cream); }
@media (max-width: 980px){
  .nav-burger{ display:inline-flex; }
}
@media (min-width: 981px){
  .nav-mobile{ display:none !important; }
}

/* === Composants article v2 (PageHeader/Callout/Checklist/Related) === */
.callout{ border:1px solid var(--rule); border-left:2px solid var(--teal); background:rgba(158,201,189,0.05); padding:18px 22px; margin:28px 0; border-radius:2px; }
.callout-label{ font-family:var(--mono); font-size:11px; letter-spacing:0.14em; text-transform:uppercase; color:var(--teal); margin:0 0 8px; }
.callout-body{ color:var(--cream-mute); font-size:16px; line-height:1.62; }
.callout-body strong{ color:var(--cream); }
.callout-body :is(a){ color:var(--cream); border-bottom:1px solid var(--teal); }
.callout-key{ border-left-color:var(--teal); background:rgba(158,201,189,0.08); }
.callout-warning{ border-left-color:var(--cream-mute); background:rgba(244,240,232,0.04); }
.callout-warning .callout-label{ color:var(--cream-mute); }
.callout-danger{ border-left-color:#d98a7a; }
.callout-danger .callout-label{ color:#d98a7a; }
.checklist-box{ border:1px solid var(--rule); background:rgba(244,240,232,0.02); padding:22px 24px; margin:28px 0; border-radius:2px; }
.check-list{ list-style:none; padding:0; margin:0; }
.check-list li{ position:relative; padding-left:30px; margin:0 0 12px; color:var(--cream-mute); line-height:1.55; }
.check-list li:last-child{ margin-bottom:0; }
.check-list li::before{ content:"\2713"; position:absolute; left:0; top:0; color:var(--teal); font-weight:600; }
.related{ border-top:1px solid var(--rule); padding: clamp(56px,7vw,88px) 0 clamp(40px,5vw,64px); }
.related-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--rule); border:1px solid var(--rule); }
.related-card{ background:var(--ink); padding:22px; display:flex; flex-direction:column; gap:8px; transition:background .2s ease; }
.related-card:hover{ background:rgba(244,240,232,0.025); }
.rc-title{ font-family:var(--serif); font-size:18px; color:var(--cream); transition:color .2s ease; }
.related-card:hover .rc-title{ color:var(--teal); }
.rc-desc{ font-size:14px; color:var(--cream-mute); line-height:1.5; }
@media (max-width:860px){ .related-grid{ grid-template-columns:1fr; } }

/* === Fallback prose v2 pour pages EN (wrappers Tailwind devenus inertes) === */
.container-narrow, .container-prose{ max-width: 820px; margin:0 auto; padding: clamp(40px,5vw,72px) var(--gut); }
.container-narrow h2, .container-prose h2{ font-family:var(--serif); font-weight:400; font-size:clamp(28px,3.2vw,40px); line-height:1.15; letter-spacing:-0.015em; color:var(--cream); margin:52px 0 16px; }
.container-narrow h2:first-child, .container-prose h2:first-child{ margin-top:0; }
.container-narrow h3, .container-prose h3{ font-family:var(--serif); font-weight:500; font-size:clamp(20px,1.6vw,24px); line-height:1.3; color:var(--cream); margin:32px 0 12px; }
.container-narrow p, .container-prose p{ font-size:17px; line-height:1.72; color:var(--cream-mute); margin:0 0 18px; }
.container-narrow ul, .container-narrow ol, .container-prose ul, .container-prose ol{ font-size:17px; line-height:1.72; color:var(--cream-mute); margin:0 0 20px; padding-left:22px; }
.container-narrow li, .container-prose li{ margin-bottom:10px; }
.container-narrow li::marker, .container-prose li::marker{ color:var(--teal); }
.container-narrow a, .container-prose a{ color:var(--cream); border-bottom:1px solid var(--teal); transition:color .2s ease; }
.container-narrow a:hover, .container-prose a:hover{ color:var(--teal); }
.container-narrow strong, .container-prose strong{ color:var(--cream); font-weight:500; }
.container-narrow em, .container-prose em{ color:var(--teal); font-style:italic; }
.container-narrow table, .container-prose table{ width:100%; border-collapse:collapse; margin:24px 0; font-size:15px; }
.container-narrow th, .container-prose th{ text-align:left; font-family:var(--mono); font-size:11px; letter-spacing:0.08em; text-transform:uppercase; color:var(--cream-dim); padding:10px; border-bottom:1px solid var(--rule); }
.container-narrow td, .container-prose td{ padding:10px; border-bottom:1px solid var(--rule); color:var(--cream-mute); vertical-align:top; }
.container-narrow blockquote, .container-prose blockquote{ font-family:var(--serif); font-style:italic; font-size:clamp(19px,2vw,24px); color:var(--cream); border-left:2px solid var(--teal); margin:28px 0; padding-left:22px; }
.container-narrow code, .container-prose code{ font-family:var(--mono); font-size:13px; background:rgba(244,240,232,0.06); color:var(--cream); padding:2px 6px; border:1px solid var(--rule); border-radius:2px; }
.container-narrow dt, .container-prose dt{ font-family:var(--serif); font-size:19px; color:var(--cream); margin:28px 0 6px; }
.container-narrow dd, .container-prose dd{ margin:0 0 16px; color:var(--cream-mute); line-height:1.65; }