/* Citizen AI · esprit Apple (thème clair unique, assumé)
   Typographie système (SF sur Mac, iPhone, iPad), blanc et gris #f5f5f7, encre #1d1d1f, un bleu d’action,
   violet = couleur Citizen AI réservée aux repères. Titres centrés, beaucoup d’air, tuiles arrondies sans bordure. */
:root{
  color-scheme: light;
  --paper:#ffffff; --paper-2:#f5f5f7; --rule:#d2d2d7; --rule-2:#c7c7cc;
  --ink:#1d1d1f; --ink-2:#424245; --ink-3:#6e6e73;
  --lab:#8e44d8; --lab-d:#6e2fb5; --lab-s:#f1e9fb; --lab-l:#b98ef0;
  --action:#0071e3; --action-h:#0077ed; --link:#0066cc;
  --pink:#e8609a; --blue:#0071e3; --yellow:#f7c948; --green:#1f9d55; --orange:#f07a3e; --red:#e30000; --lagoon:#1ba3ad;
  --display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Helvetica Neue",Helvetica,Arial,sans-serif;
  --body:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Helvetica,Arial,sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.25,.1,.25,1);
  --lift:0 4px 24px rgba(0,0,0,.06);
}
*{box-sizing:border-box}
html,body{background:var(--paper)}
body{margin:0;color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.47;letter-spacing:-.022em;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3{font-family:var(--display);margin:0;text-wrap:balance;letter-spacing:-.03em;font-weight:700}
p{margin:0}
button{font:inherit;color:inherit;letter-spacing:inherit}
a{color:var(--link)}
:focus-visible{outline:3px solid rgba(0,113,227,.6);outline-offset:3px;border-radius:8px}
[hidden]{display:none!important}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.fine{font-size:14px;color:var(--ink-3);letter-spacing:-.01em}
.label{display:block;font:600 14px var(--body);letter-spacing:-.01em;color:var(--ink-3);margin-bottom:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;background:#e8e8ed;padding:10px 20px;border-radius:980px;cursor:pointer;font:400 16px var(--body);transition:background-color .2s;text-decoration:none;color:var(--ink)}
@media (hover:hover){.btn:hover{background:#dcdce1}}
.btn.primary{background:var(--action);color:#fff}
@media (hover:hover){.btn.primary:hover{background:var(--action-h)}}
.btn[aria-pressed="true"]{background:var(--action);color:#fff}
.btn:disabled{opacity:.4;cursor:default}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

/* barre du site */
.sitebar{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:rgba(251,251,253,.8);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);color:var(--ink);border-bottom:1px solid rgba(0,0,0,.08)}
.sitebar .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:4px 18px;min-height:48px}
.brand{text-decoration:none;color:var(--ink);margin-right:auto}
.brand b{font:600 17px var(--display);letter-spacing:-.02em}
.brand b span{color:var(--lab)}
.brand small{display:none}
.sitenav{display:flex;flex-wrap:wrap;gap:2px}
.sitenav a{font-size:13px;color:var(--ink);opacity:.8;text-decoration:none;padding:6px 10px;border-radius:99px}
.sitenav a:hover{opacity:1}
.sitenav a[aria-current="page"]{opacity:1;font-weight:600}

/* en-tête de page : centré, aéré */
.cover{padding-block:clamp(50px,8vw,96px) 10px}
.cover>.inner{max-width:1080px;margin:0 auto;text-align:center;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.cover-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:44px;justify-items:center}
.cover .kicker{font:600 clamp(17px,1.6vw,21px) var(--display);color:var(--lab);letter-spacing:-.02em}
.cover h1{font-size:clamp(44px,7.4vw,80px);line-height:1.04;letter-spacing:-.045em;margin-top:8px}
.cover h1 span{color:var(--lab)}
.lede{margin:18px auto 0;font:500 clamp(20px,2.2vw,26px)/1.3 var(--display);letter-spacing:-.02em;max-width:26em;color:var(--ink)}
.sub{margin:10px auto 0;color:var(--ink-3);max-width:34em}
.facts{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:center;margin-top:20px}
.facts span{font-size:15px;color:var(--ink-3)}
.facts span+span::before{content:"·";margin-right:18px;color:var(--rule-2)}
.panel-dark{background:var(--paper-2);border-radius:28px;padding:clamp(24px,3vw,36px);display:grid;gap:14px;max-width:680px;width:100%;text-align:left}
.panel-dark h3{font:700 21px var(--display)}
.panel-dark ol,.panel-dark ul{margin:0;padding-left:22px;display:grid;gap:8px;color:var(--ink-2);font-size:17px}
.panel-dark b{color:var(--ink)}

/* barre d’étapes */
.chapnav{position:sticky;top:calc(env(safe-area-inset-top,0px) + 48px);z-index:20;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.06);margin-top:40px}
.chapnav .wrap{display:flex;gap:6px;align-items:center;overflow-x:auto;padding-block:9px;scrollbar-width:none;justify-content:safe center}
.chapnav .wrap::-webkit-scrollbar{display:none}
.pl{font-size:13px;color:var(--ink-3);white-space:nowrap;margin-right:8px}
.pl b{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.chapnav a{flex:none;display:flex;gap:7px;align-items:center;text-decoration:none;color:var(--ink);padding:6px 12px 6px 6px;border-radius:99px;font-size:13.5px;white-space:nowrap;background:transparent}
@media (hover:hover){.chapnav a:hover{background:var(--paper-2)}}
.chapnav a i{width:22px;height:22px;display:grid;place-items:center;border-radius:50%;background:var(--paper-2);font:600 11.5px var(--body);font-style:normal;color:var(--ink-3)}
.chapnav a.got i{background:var(--green);color:#fff}
.chapnav a i svg,.ckico{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}

/* étapes */
.chap{padding-block:clamp(70px,9vw,110px) 0;scroll-margin-top:110px}
.chap-head{display:grid;grid-template-columns:minmax(0,1fr);justify-items:center;text-align:center;gap:6px;margin-bottom:34px}
.num{font:600 17px var(--display);color:var(--lab);-webkit-text-stroke:0;letter-spacing:-.01em}
.num::before{content:"Étape "}
.chap-head h2{font-size:clamp(32px,4.6vw,52px);line-height:1.06;letter-spacing:-.04em}
.chap-head .intro{color:var(--ink-3);max-width:36em;margin-top:8px;font-size:clamp(17px,1.7vw,21px);line-height:1.38}
.stk{margin-top:12px;display:inline-flex;gap:6px;align-items:center;font-size:13px;color:var(--ink-3);background:var(--paper-2);border-radius:99px;padding:5px 12px}
.stk.got{background:var(--green);color:#fff}
.lab{background:var(--paper-2);border-radius:28px;padding:clamp(18px,3vw,36px)}
.lab-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:28px;align-items:start}
.note{padding:0;color:var(--ink-3);font-size:16px}
.note b{display:block;color:var(--ink);font-size:17px;margin-bottom:2px}
.notes{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));padding-inline:clamp(0px,2vw,24px)}
.steps-ux{list-style:none;margin:0 0 20px;padding:0;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:15px;color:var(--ink-2)}
.steps-ux li{display:flex;gap:8px;align-items:center}
.steps-ux li b{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:#fff;font:600 12px var(--body)}

/* récap */
.recap{padding-block:clamp(80px,10vw,120px) 20px;text-align:center}
.recap h2{font-size:clamp(32px,4.6vw,48px);margin-bottom:8px}
.planche{list-style:none;margin:28px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;text-align:left}
.planche li{display:grid;grid-template-columns:40px minmax(0,1fr);gap:12px;align-items:center;border-radius:18px;padding:14px;background:var(--paper-2)}
.planche .tile{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#fff;font:600 15px var(--body);color:var(--ink-3)}
.planche li.got .tile{background:var(--green);color:#fff}
.planche b{font-weight:600;font-size:15px;display:block}
.planche small{font-size:13px;color:var(--ink-3)}
.sources{padding-block:40px 70px}
.sources ul{margin:10px 0 0;padding-left:18px;display:grid;gap:6px;font-size:14px;color:var(--ink-3)}
footer.site{background:var(--paper-2);color:var(--ink-3);font-size:12px;border-top:1px solid rgba(0,0,0,.06)}
footer.site .wrap{padding-block:22px 34px;display:grid;gap:4px}
footer.site strong{font:600 12px var(--body);color:var(--ink-2)}
footer.site a{color:var(--link)}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);opacity:0;background:rgba(29,29,31,.92);backdrop-filter:blur(20px);color:#fff;font:500 15px var(--body);padding:12px 20px;border-radius:99px;box-shadow:var(--lift);transition:opacity .25s,transform .35s var(--ease);pointer-events:none;z-index:50;max-width:calc(100vw - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* éléments partagés */
.prompt{font:400 15px/1.55 var(--mono);background:#fff;border-radius:16px;padding:16px;white-space:pre-wrap;word-break:break-word}
.prompt mark{background:#e1efff;color:var(--ink);border-radius:4px;padding:0 2px}
.chat{display:grid;gap:8px;margin-top:16px}
.msg{max-width:88%;padding:10px 15px;border-radius:20px;font-size:16px;line-height:1.38}
.msg.me{justify-self:end;background:var(--action);color:#fff;border-bottom-right-radius:6px}
.msg.ai{justify-self:start;background:#e9e9eb;color:var(--ink);border-bottom-left-radius:6px}
.msg.ai em{display:block;font:600 12px var(--body);color:var(--ink-3);font-style:normal;margin-bottom:3px}
.ingr{display:grid;gap:8px}
.ingr label{display:grid;grid-template-columns:22px minmax(0,1fr);gap:12px;align-items:start;border-radius:14px;padding:12px 14px;cursor:pointer;background:#fff;box-shadow:0 0 0 1px transparent;transition:box-shadow .15s}
.ingr label:has(input:checked){box-shadow:0 0 0 2px var(--action)}
.ingr input{width:18px;height:18px;accent-color:var(--action);margin-top:2px}
.ingr b{font-weight:600;font-size:16px;display:block}
.ingr span{font-size:14px;color:var(--ink-3)}
.meter{display:flex;gap:12px;align-items:center;margin-top:16px}
.meter .track{flex:1;background:#e3e3e8;height:8px;border-radius:4px;overflow:hidden}
.meter .fill{height:100%;width:0;background:var(--action);border-radius:4px;transition:width .5s var(--ease)}
.meter b{font-weight:600;font-size:14px;white-space:nowrap}
.tabs{display:inline-flex;flex-wrap:wrap;gap:2px;background:#e3e3e8;border-radius:10px;padding:2px}
.tabs button{border:0;background:transparent;border-radius:8px;padding:7px 16px;cursor:pointer;font:500 14.5px var(--body)}
.tabs button[aria-selected="true"]{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.12)}

@media (max-width:900px){.lab-grid{grid-template-columns:minmax(0,1fr)}}
@media (max-width:640px){.sitenav{width:100%;overflow-x:auto;flex-wrap:nowrap}.chapnav .wrap{justify-content:flex-start}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}