/* ===== Cexella — palette réseau social : blanc 60 % · bleu 20 % · violet 10 % · rose 5 % · jaune 5 % ===== */
:root{
  --bg:#F1F5F9;--card:#FFFFFF;--tx:#0F172A;--mu:#64748B;--ln:#E2E8F0;
  --blue:#2563EB;--blue-d:#1D4ED8;--blue-l:#DBEAFE;
  --violet:#7C3AED;--violet-l:#EDE9FE;--pink:#EC4899;--yellow:#FACC15;--orange:#F97316;--green:#22C55E;
  --btn:#2563EB;--ac:var(--blue);--ac2:var(--violet);color-scheme:light;
  box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)
}
/* Thème clair imposé (identique aux maquettes) : le mode sombre du téléphone/tablette ne change plus le design.
   Pour un thème sombre manuel, mettre data-theme="dark" sur <html>. */
:root[data-theme=dark]{color-scheme:dark;--bg:#0B1020;--card:#131B33;--tx:#F1F5F9;--mu:#94A3B8;--ln:#24304F;--blue:#3B82F6;--blue-d:#2563EB;--blue-l:#1B2A55;--violet-l:#2A1E55}
*{box-sizing:border-box}html{scroll-padding-top:env(safe-area-inset-top,0px);-webkit-text-size-adjust:100%}
body{margin:0;background:radial-gradient(700px 380px at 0% -5%,var(--blue-l) 0,transparent 70%),var(--bg);background-attachment:fixed;color:var(--tx);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
h1,h2,h3{font-family:inherit;font-weight:800;letter-spacing:-.01em;margin:.2em 0;color:var(--tx)}
h2{font-size:26px}h3{font-size:19px}
button,input,select,textarea{font:inherit;color:inherit}
input,select,textarea{width:100%;padding:11px 12px;font-size:16px;border:1.5px solid var(--ln);border-radius:12px;background:var(--card);margin:4px 0 10px}
input:focus,select:focus,textarea:focus{border-color:var(--blue);outline:0;box-shadow:0 0 0 3px var(--blue-l)}
a{color:var(--blue)}
img,video{max-width:100%}

/* boutons */
.b{background:var(--btn);color:#fff;border:0;padding:11px 18px;min-height:44px;border-radius:12px;cursor:pointer;font-weight:600;transition:background .15s,transform .05s}
.b:hover{background:var(--blue-d)}.b:active{transform:scale(.98)}
.b.o{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}.b.o:hover{background:var(--blue-l)}
.b.s{padding:7px 14px;font-size:14px;min-height:36px}
.b.r{background:#DC2626}.b.r:hover{background:#B91C1C}
.b:disabled{opacity:.6;cursor:default}
.b.lk.on{color:var(--pink);border-color:var(--pink)}
button:focus-visible{outline:3px solid var(--violet);outline-offset:2px}

/* cartes et textes */
.c{background:var(--card);border:1px solid var(--ln);border-radius:16px;padding:16px;margin:0 0 12px;box-shadow:0 1px 3px #0f172a0d}
.mu{color:var(--mu);font-size:14px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:space-between}
.tag{font-size:12px;padding:2px 9px;border-radius:99px;background:var(--ln);white-space:nowrap}
.tag.g{background:var(--violet-l);color:var(--violet);font-weight:600}
.tag.hot{background:var(--orange);color:#fff;font-weight:600}
.alert{background:#FACC1526;border:1px solid var(--yellow);border-radius:12px;padding:10px 12px;margin:8px 0;font-size:14px}
.vb{width:16px;height:16px;vertical-align:-3px;margin-left:4px;display:inline-block}
.foot{font-size:13px;margin-top:18px}.foot a{color:var(--mu)}
.sep{display:flex;align-items:center;gap:10px;color:var(--mu);font-size:13px;margin:12px 0 4px}.sep:before,.sep:after{content:"";flex:1;height:1px;background:var(--ln)}
.oa{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;margin:6px 0;padding:11px 18px;min-height:44px;border-radius:12px;border:1.5px solid var(--ln);background:var(--card);color:var(--tx);font-weight:600;cursor:pointer}
.oa:hover{border-color:var(--blue)}.oa.ap{background:#000;color:#fff;border-color:#000}
.badge{background:var(--pink);color:#fff;border-radius:99px;font-size:11px;font-weight:700;padding:1px 6px;min-width:18px;text-align:center;line-height:1.4}
#toast{position:fixed;left:50%;transform:translateX(-50%);bottom:90px;background:#0F172A;color:#fff;padding:10px 16px;border-radius:12px;z-index:50;max-width:90%;font-size:14px;box-shadow:0 8px 24px #0f172a40}

/* écran de connexion */
.auth{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;max-width:420px;margin:auto}
.auth img{width:120px;height:120px;border-radius:28px;box-shadow:0 12px 36px #7c3aed55}
.auth h1{font-size:44px;margin:14px 0 4px;background:linear-gradient(135deg,var(--blue),var(--violet),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.auth .b,.auth .c{width:100%;margin:6px 0}.auth form{width:100%;text-align:left}

/* structure : ordinateur = menu à gauche */
#app{display:flex;min-height:100vh;min-height:100dvh}
nav{display:flex;gap:4px;background:var(--card);border-right:1px solid var(--ln);width:240px;flex:none;flex-direction:column;padding:16px 12px;position:sticky;top:0;height:100vh;height:100dvh;overflow-y:auto}
nav .lg{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;margin:0 0 14px 4px;background:linear-gradient(135deg,var(--blue),var(--violet),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
nav .lg img{width:38px;height:38px;border-radius:10px}
nav button{position:relative;display:flex;align-items:center;gap:14px;background:none;border:0;text-align:left;padding:11px 14px;border-radius:12px;cursor:pointer;font-weight:500;color:var(--tx)}
nav button svg{width:22px;height:22px;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
nav button:hover{background:var(--ln)}
nav button.on{background:var(--blue-l);color:var(--blue);font-weight:700}
nav button .badge{margin-left:auto}
nav button.lo{margin-top:auto;color:var(--mu)}
main{flex:1;min-width:0;padding:24px;max-width:780px;margin:0 auto;width:100%}

/* publications, profils */
.g{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-bottom:12px}
.g .gi{position:relative;aspect-ratio:1;cursor:pointer;overflow:hidden;border-radius:8px;background:var(--ln)}
.g .gi img,.g .gi video{width:100%;height:100%;object-fit:cover;border-radius:0}
.g .gi .pl{position:absolute;top:6px;right:6px;font-size:12px;background:#000a;color:#fff;border-radius:6px;padding:1px 6px}
.pm{width:100%;border-radius:12px;margin:10px 0;display:block;max-height:80vh;object-fit:contain;background:#000}
.hlr{display:flex;gap:12px;overflow-x:auto;padding-bottom:6px}
.hlr img{width:76px;height:76px;border-radius:50%;object-fit:cover;border:3px solid transparent;padding:2px;background:linear-gradient(var(--card),var(--card)) padding-box,linear-gradient(135deg,var(--yellow),var(--pink),var(--violet)) border-box;cursor:pointer;flex:none}
.feed{height:calc(100dvh - 140px);max-height:780px;overflow-y:scroll;scroll-snap-type:y mandatory;border-radius:18px;background:#000}
.feed>div{height:calc(100dvh - 140px);max-height:780px;scroll-snap-align:start;position:relative;display:flex;align-items:flex-end}
.feed video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.feed .cap{position:relative;color:#fff;padding:18px;background:linear-gradient(transparent,#000a);width:100%}

/* stories */
.stories{display:flex;gap:14px;overflow-x:auto;padding:2px 2px 12px;margin:0 0 6px;scrollbar-width:none}
.stories::-webkit-scrollbar{display:none}
.sb{position:relative;flex:none;width:72px;background:none;border:0;padding:0;cursor:pointer;text-align:center;color:var(--tx)}
.sr{display:inline-flex;padding:3px;border-radius:50%;background:linear-gradient(135deg,var(--yellow),var(--pink),var(--violet))}
.si{display:inline-flex;padding:2px;border-radius:50%;background:var(--card)}
.sb.seen .sr,.sb.add .sr{background:var(--ln)}
.sn{display:block;font-size:12px;margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sp{position:absolute;right:2px;top:44px;width:22px;height:22px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;border:2px solid var(--card);display:flex;align-items:center;justify-content:center;font-size:15px;line-height:1}
#sv{position:fixed;inset:0;z-index:100;background:#000;display:flex;justify-content:center}
.svb{position:relative;width:100%;max-width:520px;height:100%;background:#000;color:#fff}
.svm{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.svbars{position:absolute;top:calc(8px + env(safe-area-inset-top,0px));left:10px;right:10px;display:flex;gap:4px;z-index:3}
.svbars i{flex:1;height:3px;background:#ffffff55;border-radius:2px;overflow:hidden}
.svbars i.done{background:#fff}
.svbars i b{display:block;height:100%;width:0;background:#fff}
.svbars i b.t{animation:svf 5s linear forwards}
@keyframes svf{to{width:100%}}
.svh{position:absolute;top:calc(20px + env(safe-area-inset-top,0px));left:10px;right:10px;display:flex;align-items:center;gap:10px;z-index:3;text-shadow:0 1px 3px #000a}
.svx{background:#0008;color:#fff;border:0;width:44px;height:44px;border-radius:50%;font-size:28px;line-height:1;cursor:pointer}
.svz{position:absolute;top:80px;bottom:80px;background:none;border:0;z-index:2;cursor:pointer}
.svz.l{left:0;width:35%}.svz.r{right:0;width:65%}
.svf{position:absolute;bottom:calc(18px + env(safe-area-inset-bottom,0px));left:0;right:0;display:flex;justify-content:center;z-index:3}

/* avatars, présence */
.avw{position:relative;display:inline-flex;flex:none}
.dot{display:none;position:absolute;right:0;bottom:0;width:13px;height:13px;border-radius:50%;background:var(--green);border:2px solid var(--card)}
.dot.on{display:block}
#pst.onl{color:var(--green);font-weight:600}

/* messages */
.chat{display:grid;grid-template-columns:330px 1fr;gap:14px;height:calc(100dvh - 130px);min-height:420px}
.chat>.c{margin:0;padding:10px;min-height:0}
.inbox{overflow-y:auto}
.thread{display:flex;flex-direction:column}
.conv{display:flex;gap:12px;align-items:center;padding:10px;border-radius:14px;cursor:pointer}
.conv:hover{background:var(--ln)}.conv.on{background:var(--blue-l)}
.conv .tx{min-width:0;flex:1}
.conv .nmr{display:flex;justify-content:space-between;gap:8px;align-items:baseline}
.conv .tm{font-size:12px;flex:none}
.conv .pv{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--mu);font-size:14px}
.conv.un .pv{color:var(--tx);font-weight:700}
.unb{background:var(--blue);color:#fff;border-radius:99px;font-size:11px;font-weight:700;padding:1px 8px;flex:none}
.thead{display:flex;align-items:center;gap:10px;padding:4px 4px 10px;border-bottom:1px solid var(--ln);flex:none}
.tback{display:none}
#ml{flex:1;overflow-y:auto;padding:10px 4px;min-height:0}
.msg{padding:9px 13px;border-radius:18px;margin:4px 0;max-width:80%;width:fit-content;background:var(--ln);word-break:break-word}
.msg.me{margin-left:auto;background:var(--blue);color:#fff}
.msg.sys{margin:8px auto;background:#DC262618;font-size:13px;text-align:center}
.st{font-size:12px;color:var(--mu);text-align:right;margin:0 6px 4px}
.tyd{font-size:13px;color:var(--violet);min-height:20px;padding:0 6px;flex:none}
.dots i{display:inline-block;width:6px;height:6px;margin-right:3px;border-radius:50%;background:var(--violet);animation:bl 1s infinite}
.dots i:nth-child(2){animation-delay:.15s}.dots i:nth-child(3){animation-delay:.3s}
@keyframes bl{0%,60%,100%{opacity:.25}30%{opacity:1}}

/* notifications */
.nt{display:flex;gap:12px;align-items:center}
.nt .tx{min-width:0;flex:1}
.nt.new{background:var(--blue-l);border-color:var(--blue)}
.nti{width:46px;height:46px;border-radius:50%;background:var(--violet-l);color:var(--violet);display:inline-flex;align-items:center;justify-content:center;flex:none}
.nti svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* tablette : menu étroit avec icônes */
@media(min-width:700px) and (max-width:1023px){
  nav{width:92px;padding:14px 6px}
  nav .lg span{display:none}nav .lg{justify-content:center;margin-left:0}
  nav button{flex-direction:column;gap:3px;font-size:11px;padding:10px 4px;text-align:center}
  nav button .badge{position:absolute;top:4px;right:14px;margin:0}
  main{padding:20px}
}
/* conversations en une seule colonne quand la place manque */
@media(max-width:899px){
  .chat{grid-template-columns:1fr}
  .chat.has-peer .inbox{display:none}
  .chat:not(.has-peer) .thread{display:none}
  .tback{display:inline-flex}
}
/* téléphone : menu en barre du bas */
@media(max-width:699px){
  #app{flex-direction:column}
  nav{flex-direction:row;width:100%;height:auto;position:fixed;top:auto;bottom:0;left:0;right:0;border-right:0;border-top:1px solid var(--ln);padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px));gap:0;z-index:5;overflow:visible}
  nav .lg,nav button.lo{display:none}
  nav button{flex:1;min-width:0;flex-direction:column;gap:2px;font-size:9.5px;letter-spacing:-.2px;padding:6px 1px;text-align:center;border-radius:10px}
  nav button.on{font-weight:600}
  nav button svg{width:24px;height:24px}
  nav button span:not(.badge):not([id]){max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  nav button .badge{position:absolute;top:2px;left:calc(50% + 6px);margin:0}
  main{padding:14px 14px calc(88px + env(safe-area-inset-bottom,0px))}
  h2{font-size:22px}
  .chat{height:calc(100dvh - 190px - env(safe-area-inset-bottom,0px))}
  .feed,.feed>div{height:calc(100dvh - 190px);max-height:none}
  #toast{bottom:96px}
  .auth h1{font-size:38px}
}
@media(min-width:1280px){main{max-width:840px}}
.cs{border:1px solid var(--ln);border-radius:12px;background:var(--card);margin:-6px 0 10px;overflow:hidden}.cs:empty{display:none}
.csi{display:block;width:100%;text-align:left;padding:10px 12px;border:0;background:none;cursor:pointer;font-size:15px}.csi:hover,.csi:focus-visible{background:var(--violet-l)}
.stay{font-size:12px;padding:4px 6px;flex:none}
.sgal{display:flex;gap:6px;overflow-x:auto;margin-top:8px;padding-bottom:2px}
.sim{position:relative;flex:none}.sim img{display:block;width:84px;height:84px;object-fit:cover;border-radius:10px;cursor:zoom-in}
.sim .x{position:absolute;top:3px;right:3px;width:22px;height:22px;border-radius:50%;border:0;background:rgba(0,0,0,.65);color:#fff;font-size:15px;line-height:1;cursor:pointer;padding:0}
.lbx{position:fixed;inset:0;background:rgba(0,0,0,.86);display:flex;align-items:center;justify-content:center;z-index:99;cursor:zoom-out}
.lbx img{max-width:94vw;max-height:90vh;border-radius:12px}