/* =========================================================
   RIAZ LAB — L'IA souveraine, en local
   White · Apple-tech · avant-garde
   ========================================================= */

:root{
  --bg:       #FFFFFF;
  --bg-soft:  #F5F5F7;
  --bg-soft2: #FAFAFA;
  --ink:      #0A0A0A;
  --ink-2:    #6E6E73;
  --muted:    #9A9AA0;
  --line:     rgba(0,0,0,.09);
  --line-2:   rgba(0,0,0,.14);
  --accent:   #0A84FF;
  --accent-2: #00C2FF;
  --accent-press:#0060DF;
  --accent-soft:rgba(10,132,255,.10);

  --ff-display:'Clash Display', sans-serif;
  --ff-body:   'Satoshi', sans-serif;
  --ff-mono:   'JetBrains Mono', ui-monospace, monospace;

  --maxw: 1200px;
  --ease:  cubic-bezier(.22,.61,.36,1);
  --ease-2:cubic-bezier(.16,1,.3,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--ff-body);font-weight:400;line-height:1.6;letter-spacing:-.005em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;
}
::selection{background:var(--accent);color:#fff}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
h1,h2,h3{margin:0;font-family:var(--ff-display);font-weight:600;letter-spacing:-.02em;line-height:1.0}
.mono{font-family:var(--ff-mono);font-weight:400;letter-spacing:.01em}

.progress{position:fixed;inset:0 0 auto 0;height:2px;z-index:100;pointer-events:none}
.progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2))}

/* =========================================================
   NAV
   ========================================================= */
.nav{position:fixed;top:0;left:0;right:0;z-index:80;display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,5vw,56px);transition:padding .4s var(--ease),background .4s var(--ease),border-color .4s var(--ease);
  border-bottom:1px solid transparent}
.nav[data-scrolled]{padding-top:12px;padding-bottom:12px;background:rgba(255,255,255,.72);
  backdrop-filter:blur(20px) saturate(1.8);-webkit-backdrop-filter:blur(20px) saturate(1.8);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{display:grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--ink);color:#fff;
  font-family:var(--ff-display);font-weight:600;font-size:16px;line-height:1}
.brand__mark--sm{width:24px;height:24px;font-size:13px;border-radius:6px}
.brand__type{font-family:var(--ff-display);font-weight:600;font-size:17px;letter-spacing:-.01em}
.nav__links{display:flex;gap:30px}
.nav__links a{font-size:14.5px;color:var(--ink-2);position:relative;padding:5px 0;transition:color .25s var(--ease)}
.nav__links a:hover{color:var(--ink)}
.nav__cta{font-size:14px;font-weight:500;padding:9px 18px;border-radius:100px;background:var(--ink);color:#fff;
  transition:transform .3s var(--ease),background .3s var(--ease)}
.nav__cta:hover{background:var(--accent);transform:translateY(-1px)}
@media (max-width:880px){.nav__links{display:none}}

/* =========================================================
   shared
   ========================================================= */
main{position:relative;z-index:2}
section{padding:clamp(80px,11vw,150px) clamp(20px,5vw,56px);position:relative}
.sec-head{max-width:var(--maxw);margin:0 auto clamp(44px,6vw,72px)}
.sec-head--row{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;flex-wrap:wrap}
.sec-head__num{display:inline-block;font-size:12.5px;color:var(--accent);letter-spacing:.04em;margin-bottom:18px;text-transform:uppercase}
.sec-head__title{font-size:clamp(34px,5.4vw,64px);font-weight:600;letter-spacing:-.03em;line-height:1.02}
.sec-head__sub{margin:18px 0 0;max-width:42ch;color:var(--ink-2);font-size:clamp(16px,1.6vw,19px)}
.sec-head--row .sec-head__sub{margin:0;text-align:right}

.kicker{font-family:var(--ff-mono);font-size:13px;letter-spacing:.04em;color:var(--ink-2);margin:0;text-transform:uppercase}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-size:15.5px;font-weight:500;border-radius:100px;padding:14px 28px;
  transition:transform .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease),color .3s var(--ease)}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 8px 24px -10px var(--accent)}
.btn--primary:hover{background:var(--accent-press);transform:translateY(-2px);box-shadow:0 16px 36px -12px var(--accent)}
.btn--plain{color:var(--ink);padding-left:8px;padding-right:8px}
.btn--plain span{color:var(--accent);transition:transform .3s var(--ease)}
.btn--plain:hover span{transform:translateX(4px)}

/* =========================================================
   HERO
   ========================================================= */
.hero{min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  padding-top:130px;padding-bottom:70px;overflow:hidden}
.hero__aura{position:absolute;top:-10%;left:50%;transform:translateX(-50%);width:min(1100px,120vw);height:780px;z-index:0;pointer-events:none;
  background:radial-gradient(50% 50% at 50% 40%,rgba(10,132,255,.16),transparent 70%),
             radial-gradient(40% 40% at 65% 30%,rgba(0,194,255,.12),transparent 70%);
  filter:blur(10px)}
.hero > *:not(.hero__aura){position:relative;z-index:1}

/* Pas de visuel dans le héros : le site publie un article, le type suffit. */

.hero .kicker{margin-bottom:24px}
.hero__title{font-size:clamp(44px,8vw,104px);font-weight:600;letter-spacing:-.045em;line-height:.98}
.hero__title span{display:block}
.hero__title-accent{background:linear-gradient(100deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__sub{margin:30px auto 0;max-width:40ch;font-size:clamp(18px,2vw,23px);color:var(--ink-2);font-weight:400;line-height:1.45}
.hero__sub strong{color:var(--ink);font-weight:600}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:36px}
.hero__chips{list-style:none;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:48px 0 0;padding:0}
.hero__chips li{font-size:12px;color:var(--ink-2);padding:8px 15px;border:1px solid var(--line-2);border-radius:100px;background:var(--bg-soft2)}

/* =========================================================
   STATEMENT
   ========================================================= */
.statement{background:var(--bg-soft);text-align:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.statement__big{margin:0 auto;max-width:22ch;font-family:var(--ff-display);font-weight:500;
  font-size:clamp(28px,5vw,56px);line-height:1.1;letter-spacing:-.03em}
.statement__big em{font-style:normal;color:var(--accent);display:block;margin-top:.25em}

/* =========================================================
   À PROPOS
   ========================================================= */
.about__body{max-width:780px;margin:0 auto}
.about__body .lead{font-family:var(--ff-display);font-weight:500;font-size:clamp(24px,3.2vw,38px);line-height:1.22;letter-spacing:-.025em;margin:0 0 28px}
.about__body .lead strong{color:var(--accent)}
.about__body p{margin:0 0 22px;color:var(--ink-2);font-size:clamp(16.5px,1.6vw,19px);line-height:1.6}
.about__body p strong{color:var(--ink);font-weight:600}
.about__body p em{font-style:italic;color:var(--ink)}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:46px 0 0;border-top:1px solid var(--line)}
.metrics div{padding:22px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.metrics dt{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0}
.metrics dd{margin:0;font-family:var(--ff-display);font-weight:600;font-size:clamp(17px,1.8vw,21px)}
@media (max-width:620px){.metrics{grid-template-columns:repeat(2,1fr);gap:0 24px}}

/* =========================================================
   LE LABO / STACK
   ========================================================= */
.labo{background:var(--bg-soft);border-top:1px solid var(--line)}
.stack{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.rig{padding:clamp(28px,3vw,40px);border:1px solid var(--line);border-radius:24px;background:var(--bg);position:relative;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.rig:hover{transform:translateY(-4px);box-shadow:0 30px 60px -34px rgba(0,0,0,.22)}
.rig__tag{display:inline-block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);
  margin:0 0 20px;padding:5px 11px;border-radius:100px;background:var(--accent-soft)}
.rig__name{font-size:clamp(22px,2.4vw,28px);font-weight:600;margin-bottom:10px}
.rig__spec{font-size:12.5px;color:var(--muted);margin:0 0 16px}
.rig__line{margin:0;color:var(--ink-2);font-size:15.5px;line-height:1.5;max-width:44ch}
@media (max-width:760px){.stack{grid-template-columns:1fr}}

/* =========================================================
   NOTEBOOK STREAM — one card per entry (note, app, dataset, file).
   Rendered by tools/build.php from content/entries.json.
   ========================================================= */
.stream{list-style:none;max-width:var(--maxw);margin:0 auto;padding:0;
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
/* No transform in the hover rule: app.js writes an inline transform to make the
   card lean toward the cursor, and an inline style would silently win over this
   one. Shadow and border stay in CSS so the card still responds with motion off. */
.entry a{display:flex;flex-direction:column;height:100%;gap:10px;padding:clamp(22px,2.4vw,30px);
  border:1px solid var(--line);border-radius:22px;background:var(--bg);
  transition:box-shadow .4s var(--ease),border-color .4s var(--ease)}
.entry a:hover{box-shadow:0 34px 68px -40px rgba(0,0,0,.28);border-color:var(--line-2)}
.entry a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-color:var(--accent)}
.entry__badge{margin:0;display:inline-block;align-self:flex-start;font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent);padding:5px 11px;border-radius:100px;background:var(--accent-soft)}
.entry__title{font-size:clamp(19px,1.9vw,23px);font-weight:600;line-height:1.16;letter-spacing:-.015em}
.entry__summary{margin:0;flex:1;color:var(--ink-2);font-size:15px;line-height:1.55}
.entry__meta{margin:0;font-size:11.5px;color:var(--muted);letter-spacing:.03em}
.entry__tags{margin:0;display:flex;flex-wrap:wrap;gap:6px}
.entry__tags span{font-size:10.5px;letter-spacing:.04em;color:var(--ink-2);
  padding:3px 8px;border-radius:6px;background:var(--bg-soft);border:1px solid var(--line)}

/* Un seul article publié : sa carte prend toute la largeur, toujours. */
.stream{grid-template-columns:1fr}
.entry--feature{grid-column:1/-1}

/* Ce qui sert l'article — deux liens sobres, pas deux publications. */
.backing{max-width:var(--maxw);margin:clamp(28px,4vw,44px) auto 0;
  border-top:1px solid var(--line);padding-top:clamp(24px,3vw,34px)}
.backing__lead{margin:0 0 18px;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.backing__list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.backing__list a{display:block;padding:20px 22px;border:1px solid var(--line);border-radius:16px;
  background:var(--bg);transition:border-color .3s var(--ease),background .3s var(--ease)}
.backing__list a:hover{border-color:var(--accent);background:var(--accent-soft)}
.backing__list a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.backing__list b{display:block;font-family:var(--ff-display);font-weight:600;font-size:17px;letter-spacing:-.01em}
.backing__list span{display:block;margin-top:7px;color:var(--ink-2);font-size:14.5px;line-height:1.5}
@media (max-width:700px){.backing__list{grid-template-columns:1fr}}
.entry--feature .entry__title{font-size:clamp(26px,3.4vw,42px);line-height:1.06;letter-spacing:-.028em;max-width:20ch}
.entry--feature .entry__summary{font-size:clamp(16px,1.7vw,18.5px);max-width:62ch}
.entry--feature a{background:var(--bg-soft);gap:14px}

/* Datasets and files are downloads, not pages — mark the difference. */
.entry--data .entry__badge,.entry--file .entry__badge{color:var(--ink-2);background:var(--bg-soft)}
.entry--data .entry__title::after,.entry--file .entry__title::after{content:" ↓";color:var(--muted);font-weight:400}

@media (max-width:900px){.stream{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.stream{grid-template-columns:1fr}.entry--feature .entry__title{max-width:none}}

/* =========================================================
   PAGE HEAD — sub-pages that are not the home page
   ========================================================= */
.page{padding-top:0}
.page-head{max-width:var(--maxw);margin:0 auto;padding:clamp(112px,14vw,160px) clamp(20px,5vw,56px) clamp(28px,4vw,44px)}
.page-head__title{font-family:var(--ff-display);font-weight:600;font-size:clamp(36px,6vw,68px);
  line-height:1.02;letter-spacing:-.03em;margin:16px 0 0}
.page-head__sub{margin:22px 0 0;max-width:66ch;color:var(--ink-2);font-size:clamp(16px,1.7vw,19.5px);line-height:1.6}
.page-head__sub b{color:var(--ink);font-weight:600}
.page-head__meta{margin:22px 0 0;font-size:12.5px;color:var(--muted)}
.page-head__meta a{color:var(--accent)}

/* =========================================================
   STATS — figures that count up (app.js reads data-count)
   ========================================================= */
.facts{padding:0 clamp(20px,5vw,56px) clamp(40px,6vw,72px)}
.facts .stats{grid-template-columns:repeat(3,1fr);gap:0 clamp(20px,4vw,56px)}
.facts .stat b{font-size:clamp(34px,5vw,58px)}
.facts .stat span{max-width:22ch}
@media (max-width:700px){.facts .stats{grid-template-columns:1fr}}

.stats{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line)}
.stat{padding:26px 0;border-bottom:1px solid var(--line)}
.stat b{display:block;font-family:var(--ff-display);font-weight:600;font-size:clamp(28px,4vw,46px);
  letter-spacing:-.03em;line-height:1}
.stat span{display:block;margin-top:9px;font-family:var(--ff-mono);font-size:11px;letter-spacing:.09em;
  text-transform:uppercase;color:var(--muted)}
@media (max-width:700px){.stats{grid-template-columns:repeat(2,1fr);gap:0 24px}}

/* =========================================================
   CONTACT
   ========================================================= */
.contact{background:var(--bg-soft);text-align:center;border-top:1px solid var(--line)}
.contact .sec-head__num{color:var(--accent)}
.contact__inner{max-width:720px;margin:0 auto}
.contact__title{font-family:var(--ff-display);font-weight:600;font-size:clamp(36px,6vw,72px);letter-spacing:-.03em;line-height:1.02;margin:20px 0 0}
.contact__sub{margin:24px auto 0;max-width:44ch;color:var(--ink-2);font-size:clamp(16px,1.7vw,20px)}
.mailcta{display:inline-flex;flex-direction:column;gap:7px;margin:44px 0 0;padding:22px 46px;border-radius:20px;
  background:var(--bg);border:1px solid var(--line-2);transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s var(--ease)}
.mailcta:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 30px 60px -28px var(--accent-soft)}
.mailcta__label{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.mailcta__addr{font-family:var(--ff-display);font-weight:600;font-size:clamp(24px,3.2vw,36px);color:var(--accent)}
.contact__row{display:flex;gap:12px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.chip{font-size:12.5px;padding:10px 18px;border-radius:100px;border:1px solid var(--line-2);color:var(--ink-2);background:var(--bg);transition:border-color .3s var(--ease),color .3s var(--ease)}
.chip:hover{border-color:var(--accent);color:var(--ink)}

/* =========================================================
   FOOTER
   ========================================================= */
.foot{display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;padding:30px clamp(20px,5vw,56px);border-top:1px solid var(--line)}
.foot__brand{display:flex;align-items:center;gap:10px;font-family:var(--ff-display);font-weight:600;font-size:16px}
.foot__line{margin:0;text-align:center;color:var(--ink-2);font-size:13.5px}
.foot__meta{display:flex;align-items:center;gap:11px;font-size:12px;color:var(--muted);justify-self:end}
.foot__meta a:hover{color:var(--ink)}
.foot__sep{color:var(--line-2)}
@media (max-width:760px){.foot{grid-template-columns:1fr;text-align:center;justify-items:center}.foot__meta{justify-self:center}}

/* =========================================================
   ARTICLE (reading) PAGES
   ========================================================= */
.sec-head__cta{flex-shrink:0;align-self:flex-end}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.reading{max-width:728px;margin:0 auto;padding:clamp(116px,15vw,168px) clamp(20px,5vw,56px) clamp(56px,8vw,96px)}
.reading__back{display:inline-flex;align-items:center;gap:8px;font-family:var(--ff-mono);font-size:12.5px;color:var(--ink-2);margin-bottom:40px;transition:color .25s var(--ease)}
.reading__back span{color:var(--accent)}
.reading__back:hover{color:var(--ink)}
.reading__kicker{font-family:var(--ff-mono);font-size:12.5px;letter-spacing:.04em;text-transform:uppercase;color:var(--accent);margin:0 0 18px}
.reading__title{font-family:var(--ff-display);font-weight:600;font-size:clamp(32px,5.4vw,58px);line-height:1.03;letter-spacing:-.03em;margin:0 0 22px}
.reading__meta{display:flex;flex-wrap:wrap;gap:12px;align-items:center;font-family:var(--ff-mono);font-size:12.5px;color:var(--muted);padding-bottom:32px;border-bottom:1px solid var(--line);margin-bottom:44px}
.reading__meta b{color:var(--ink-2);font-weight:400}
.prose{font-size:clamp(17px,1.7vw,19px);line-height:1.72;color:#2A2A30}
.prose > p{margin:0 0 24px}
.prose .lead{font-family:var(--ff-display);font-weight:500;font-size:clamp(21px,2.5vw,28px);line-height:1.34;letter-spacing:-.015em;color:var(--ink);margin-bottom:34px}
.prose h2{font-family:var(--ff-display);font-weight:600;font-size:clamp(23px,2.8vw,32px);letter-spacing:-.02em;color:var(--ink);margin:50px 0 18px}
.prose strong{color:var(--ink);font-weight:600}
.prose em{font-style:italic}
.prose ul{margin:0 0 26px;padding:0;list-style:none}
.prose li{position:relative;padding-left:26px;margin-bottom:13px}
.prose li::before{content:"";position:absolute;left:0;top:.6em;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.prose li strong{color:var(--ink)}
.prose blockquote{margin:38px 0;padding:6px 0 6px 28px;border-left:3px solid var(--accent);font-family:var(--ff-display);font-weight:500;font-size:clamp(21px,2.5vw,28px);line-height:1.3;color:var(--ink)}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.reading__sign{margin-top:50px;padding-top:30px;border-top:1px solid var(--line);display:flex;align-items:center;gap:14px}
.reading__sign img{width:52px;height:52px;border-radius:50%;object-fit:cover;object-position:50% 22%;border:2px solid #fff;box-shadow:0 8px 20px -10px rgba(0,0,0,.4)}
.reading__sign b{display:block;font-family:var(--ff-display);font-weight:600;font-size:15px}
.reading__sign span{color:var(--ink-2);font-size:13.5px}
.reading__cta{margin-top:48px;padding:28px;border:1px solid var(--line);border-radius:20px;background:var(--bg-soft);text-align:center}
.reading__cta p{margin:0 0 16px;font-family:var(--ff-display);font-weight:500;font-size:clamp(18px,2vw,22px);color:var(--ink)}

/* =========================================================
   PROSE EXTRAS — used by the notes
   ========================================================= */
.prose--narrow{max-width:728px;margin:0 auto;padding:clamp(40px,6vw,72px) clamp(20px,5vw,56px)}
.prose__list{margin:0 0 26px;padding:0;list-style:none}
.prose__list li{position:relative;padding-left:26px;margin-bottom:13px}
.prose__list li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.prose__list b{color:var(--ink);font-weight:600}
.prose__note{margin:34px 0 0;padding:16px 20px;border-left:3px solid var(--line-2);background:var(--bg-soft);
  border-radius:0 12px 12px 0;font-size:15px;color:var(--ink-2)}
.prose code{font-family:var(--ff-mono);font-size:.88em;background:var(--bg-soft);padding:2px 6px;
  border-radius:5px;border:1px solid var(--line)}
.prose figure{margin:40px 0}
.prose figcaption{margin-top:14px;font-family:var(--ff-mono);font-size:12px;line-height:1.5;color:var(--muted)}
.prose table{width:100%;border-collapse:collapse;font-size:15px;margin:10px 0 0}
.prose th,.prose td{text-align:left;padding:9px 12px 9px 0;border-bottom:1px solid var(--line)}
.prose th{font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.07em;text-transform:uppercase;
  color:var(--muted);font-weight:400}
.prose td{font-variant-numeric:tabular-nums;color:var(--ink-2)}
.prose td:first-child{color:var(--ink)}
.prose__num{text-align:right}

/* =========================================================
   REVEAL — anime.js drives opacity and transform inline.
   CSS only holds the pre-animation state and the two escape hatches:
   `.motion-off` (module never loaded) and reduced motion.
   ========================================================= */
.js .reveal,.js [data-reveal]{opacity:0}
.js.motion-off .reveal,.js.motion-off [data-reveal]{opacity:1;transform:none}
.nav__links a[data-current]{color:var(--ink)}
@media (prefers-reduced-motion:reduce){
  .reveal,[data-reveal]{opacity:1!important;transform:none!important}
}

@media (max-width:560px){
  .hero__title{font-size:clamp(40px,11vw,64px)}
  .sec-head--row{align-items:flex-start}
  .sec-head--row .sec-head__sub{text-align:left}
}