:root{
  --blue:#1f5fbf; --blue2:#2e73e0; --dark:#16233a; --ink:#1a2233; --grey:#6b7688;
  --line:#e7ecf3; --bg:#f4f7fb; --green:#0fa47f; --amber:#e8912a; --violet:#7a5cf0;
  --pink:#e0518b; --teal:#3aa6b9; --out:#1f5fbf;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);overflow:hidden}
button{font-family:inherit;cursor:pointer}
.tag-dot{width:9px;height:9px;border-radius:50%;display:inline-block}
.b-Work{background:var(--blue)} .b-Client{background:var(--green)} .b-Family{background:var(--pink)}
.b-Supplier{background:var(--amber)} .b-AI{background:var(--violet)} .b-Community{background:var(--teal)}
.b-Friend{background:var(--violet)} .b-Other{background:var(--grey)}

/* ---------- app shell ---------- */
.app{display:flex;height:100vh;max-width:1200px;margin:0 auto;background:#fff;
  box-shadow:0 0 60px rgba(20,35,60,.10)}
.pane{display:flex;flex-direction:column;min-height:0}
.sidebar{width:360px;flex:0 0 360px;border-right:1px solid var(--line);background:var(--bg)}
.main{flex:1}

/* ---------- sidebar ---------- */
.brand{display:flex;align-items:center;gap:10px;padding:16px 18px 12px}
.brand .logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--violet));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px}
.brand h1{font-size:20px;color:var(--dark);letter-spacing:-.4px;flex:1}
.hbtn{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);background:#fff;color:var(--blue);
  font-size:16px;display:flex;align-items:center;justify-content:center}
.hbtn.small{font-size:12px;width:auto;padding:0 10px;gap:5px;color:var(--grey)}
.search{margin:0 18px 10px;background:#fff;border:1px solid var(--line);border-radius:11px;
  padding:9px 12px;display:flex;gap:8px;align-items:center}
.search input{border:none;outline:none;font-size:13.5px;flex:1;background:transparent;color:var(--ink)}
.chips{display:flex;gap:7px;overflow-x:auto;padding:2px 18px 12px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{white-space:nowrap;font-size:12.5px;font-weight:600;padding:6px 13px;border-radius:16px;
  border:1.5px solid var(--line);background:#fff;color:var(--grey);transition:.15s}
.chip.active{color:#fff;border-color:transparent}
.chip.active[data-cat="All"]{background:var(--dark)}
.chip.active[data-cat="Work"]{background:var(--blue)}
.chip.active[data-cat="Client"]{background:var(--green)}
.chip.active[data-cat="Family"]{background:var(--pink)}
.chip.active[data-cat="Supplier"]{background:var(--amber)}
.chip.active[data-cat="Community"]{background:var(--teal)}
.chip.active[data-cat="Friend"],.chip.active[data-cat="AI"]{background:var(--violet)}
.list{flex:1;overflow-y:auto;background:#fff}
.contact{display:flex;gap:12px;padding:12px 16px;align-items:center;border-bottom:1px solid #f0f3f8;transition:background .12s}
.contact:hover{background:var(--bg)}
.contact.sel{background:#eef4fd}
.av{width:46px;height:46px;border-radius:50%;flex:0 0 46px;display:flex;align-items:center;
  justify-content:center;color:#fff;font-weight:700;font-size:17px}
.cbody{flex:1;min-width:0}
.cname{font-size:15px;font-weight:600;display:flex;align-items:center;gap:6px}
.cmsg{font-size:12.7px;color:var(--grey);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.ctime{font-size:11px;color:var(--grey)}
.cmeta{display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex:0 0 auto}
.badge-spacer{height:19px;display:block}
.unread{background:var(--blue);color:#fff;font-size:10.5px;font-weight:700;min-width:19px;height:19px;
  border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 6px}
.unread.missed{background:#e0402f}
.missed-txt{color:#e0402f;font-weight:600}
.contact.has-unread .cname{font-weight:700}
.contact.has-unread .cmsg{color:var(--ink);font-weight:500}
.empty{padding:40px 24px;text-align:center;color:var(--grey);font-size:13.5px;line-height:1.6}
.build{flex:0 0 auto;text-align:center;font-size:10.5px;color:var(--grey);opacity:.7;
  padding:6px 0 8px;background:#fff;border-top:1px solid var(--line)}

/* ---------- conversation ---------- */
.main{background:var(--bg)}
.placeholder{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--grey);gap:12px;text-align:center;padding:30px}
.placeholder .big{font-size:44px}
.conv{display:none;flex-direction:column;height:100%}
.conv.show{display:flex}
.conv-top{background:#fff;border-bottom:1px solid var(--line)}
.conv-head{display:flex;align-items:center;gap:12px;padding:11px 16px}
.back{display:none;font-size:24px;color:var(--blue);background:none;border:none;line-height:1}
.conv-head .cbody .cname{font-size:16px}
.conv-head .sub{font-size:11.5px;color:var(--grey);margin-top:1px}
.callbtns{display:flex;gap:7px}
.callbtns button{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:16px}
.callbtns .video{background:var(--green);border-color:var(--green)}
.subject-tabs{display:flex;gap:6px;overflow-x:auto;padding:0 16px 11px;scrollbar-width:none;align-items:center}
.subject-tabs::-webkit-scrollbar{display:none}
.stab{white-space:nowrap;font-size:12.5px;font-weight:600;padding:6px 13px;border-radius:14px;
  background:var(--bg);color:var(--grey);border:1.5px solid transparent}
.stab.active{background:#fff;color:var(--blue);border-color:var(--blue)}
.stab.add{background:transparent;color:var(--blue);border:1.5px dashed var(--line);font-weight:700}
.thread{flex:1;overflow-y:auto;padding:18px 18px;display:flex;flex-direction:column;gap:9px;
  background:linear-gradient(180deg,#eef2f8,#f4f7fb)}
.day{align-self:center;font-size:10.5px;color:var(--grey);background:#fff;padding:3px 11px;border-radius:10px;margin:2px 0}
.msg{max-width:70%;padding:9px 13px;border-radius:15px;font-size:13.6px;line-height:1.45;word-wrap:break-word}
.msg .t{font-size:9.5px;margin-top:4px;opacity:.6;text-align:right}
.msg.them{align-self:flex-start;background:#fff;border-bottom-left-radius:5px;box-shadow:0 1px 3px rgba(20,35,60,.06)}
.msg.me{align-self:flex-end;background:var(--out);color:#fff;border-bottom-right-radius:5px}
.msg.me .t{color:#dbe8ff}
.thread .empty-thread{align-self:center;color:var(--grey);font-size:12.5px;margin:auto}
.composer{background:#fff;border-top:1px solid var(--line);padding:10px 14px;display:flex;gap:10px;align-items:center}
.composer input{flex:1;background:var(--bg);border:1px solid var(--line);border-radius:20px;
  padding:11px 16px;font-size:14px;outline:none}
.composer input:focus{border-color:var(--blue)}
.composer .send{width:42px;height:42px;border-radius:50%;background:var(--blue);color:#fff;border:none;font-size:17px}
.composer .share-app{width:42px;height:42px;border-radius:50%;background:#fff;border:1px solid var(--line);font-size:18px}
.composer .share-app:hover{background:var(--bg)}

/* shared interactive app card */
.app-card{max-width:78%;background:#fff;border:1px solid var(--line);border-radius:15px;padding:11px;
  box-shadow:0 1px 3px rgba(20,35,60,.06)}
.app-card.me{align-self:flex-end;border-color:#c9ddf7;background:#f3f8ff}
.app-card.them{align-self:flex-start}
.ac-head{display:flex;gap:10px;align-items:center}
.ac-ic{width:38px;height:38px;border-radius:10px;background:#eef2ff;display:flex;align-items:center;justify-content:center;font-size:19px}
.ac-title{font-size:14px;font-weight:700}
.ac-url{font-size:11.5px;color:var(--grey);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}
.ac-frame{margin-top:9px}
.ac-frame iframe{width:100%;height:300px;border:1px solid var(--line);border-radius:10px;background:#fff}
.ac-hint{font-size:10.5px;color:var(--grey);margin-top:5px}
.ac-actions{display:flex;gap:8px;margin-top:9px}
.ac-btn{flex:1;border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px;font-size:12.5px;font-weight:600;color:var(--blue)}
.ac-btn.launch{background:var(--blue);color:#fff;border-color:var(--blue)}
.app-card .t{font-size:9.5px;opacity:.6;margin-top:6px;text-align:right}

/* ---------- classification / profile drawer ---------- */
.drawer{position:fixed;inset:0;background:rgba(16,24,40,.45);display:none;align-items:center;justify-content:center;z-index:60}
.drawer.show{display:flex}
.card{background:#fff;width:min(440px,92vw);max-height:88vh;overflow-y:auto;border-radius:18px;padding:0}
.card .hero{background:linear-gradient(135deg,var(--blue),#3f8bea);color:#fff;padding:22px;text-align:center;border-radius:18px 18px 0 0;position:relative}
.card .hero .x{position:absolute;top:12px;right:14px;background:rgba(255,255,255,.2);border:none;color:#fff;
  width:30px;height:30px;border-radius:50%;font-size:16px}
.card .hero .av{width:72px;height:72px;font-size:27px;margin:0 auto 10px;border:3px solid rgba(255,255,255,.5)}
.card .hero h2{font-size:20px}.card .hero .p{opacity:.9;font-size:12.5px;margin-top:3px}
.card .sec{padding:16px 20px;border-bottom:1px solid var(--line)}
.card .sec:last-child{border:0}
.card .sec h3{font-size:11.5px;text-transform:uppercase;letter-spacing:.5px;color:var(--grey);margin-bottom:11px}
.catgrid{display:flex;flex-wrap:wrap;gap:8px}
.cat{font-size:12.5px;font-weight:600;padding:7px 13px;border-radius:15px;border:1.5px solid var(--line);
  color:var(--grey);background:#fff;user-select:none;transition:.13s}
.cat.sel{color:#fff;border-color:transparent}
.cat.sel[data-c="Work"]{background:var(--blue)} .cat.sel[data-c="Client"]{background:var(--green)}
.cat.sel[data-c="Family"]{background:var(--pink)} .cat.sel[data-c="Supplier"]{background:var(--amber)}
.cat.sel[data-c="Community"]{background:var(--teal)} .cat.sel[data-c="Friend"]{background:var(--violet)}
.cat.sel[data-c="Other"]{background:var(--grey)}
.subj-row{display:flex;align-items:center;gap:10px;padding:9px 2px;border-bottom:1px solid #f0f3f8;font-size:13.5px}
.subj-row:last-child{border:0}.subj-row .d{width:8px;height:8px;border-radius:50%;background:var(--blue)}
.subj-row .n{flex:1;font-weight:600}.subj-row .c{font-size:11.5px;color:var(--grey)}

/* ---------- new group ---------- */
.group-input{width:100%;border:1px solid var(--line);border-radius:11px;padding:11px 13px;font-size:14.5px;outline:none}
.group-input:focus{border-color:var(--blue)}
.member-row{display:flex;align-items:center;gap:11px;padding:9px 2px;border-bottom:1px solid #f0f3f8;cursor:pointer}
.member-row:last-child{border:0}
.member-row input{width:18px;height:18px;accent-color:var(--blue)}
.member-row .av.small{width:34px;height:34px;flex:0 0 34px;font-size:13px}
.member-row .mname{font-size:14px;font-weight:600}
.group-create{width:100%;background:var(--teal);color:#fff;border:none;border-radius:12px;
  padding:13px;font-size:15px;font-weight:600}
.group-create:disabled{opacity:.6}
.group-note{font-size:11.5px;color:var(--grey);line-height:1.55;margin-bottom:12px}
select.group-input{appearance:none;background:#fff}

/* group details / moderation */
.grp-meta{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:10px}
.grp-topic{font-size:11.5px;font-weight:700;color:#fff;background:var(--teal);padding:3px 10px;border-radius:11px}
.grp-count{font-size:11.5px;color:var(--grey);background:var(--bg);padding:3px 10px;border-radius:11px}
.grp-owner{font-size:11.5px;font-weight:600;color:var(--green);background:#eaf7f2;padding:3px 10px;border-radius:11px}
.grp-warn{font-size:11.5px;line-height:1.55;color:#8a5a00;background:#fff6e6;border:1px solid #f2dfb8;
  padding:9px 11px;border-radius:10px;margin-bottom:10px}
.grp-invite{width:100%;background:var(--bg);border:1px solid var(--line);border-radius:10px;
  padding:10px;font-size:13px;font-weight:600;color:var(--blue)}
.grp-hint{font-size:11px;color:var(--grey);line-height:1.5;margin-top:8px}
.grp-remove{background:transparent;border:1px solid var(--line);color:#e0402f;border-radius:8px;
  font-size:11px;font-weight:600;padding:4px 9px}

/* ---------- native call ---------- */
.call-modal{position:fixed;inset:0;background:linear-gradient(160deg,#101a2c,#1b2c48);display:none;
  flex-direction:column;z-index:70;color:#fff}
.call-modal.show{display:flex}
.call-top{display:flex;align-items:baseline;gap:12px;padding:14px 20px}
.call-top h3{font-size:17px}
.call-status{font-size:12.5px;opacity:.75}
.call-error{font-size:12.5px;color:#ffb4a8;background:rgba(224,64,47,.18);
  border:1px solid rgba(224,64,47,.45);padding:4px 10px;border-radius:10px}
.incoming-card .av{animation:ringpulse 1.4s ease-in-out infinite}
@keyframes ringpulse{
  0%,100%{box-shadow:0 0 0 0 rgba(31,95,191,.45)}
  50%{box-shadow:0 0 0 14px rgba(31,95,191,0)}
}
.call-stage{flex:1;position:relative;margin:0 12px;border-radius:16px;overflow:hidden;background:#000}
#remoteVideo{width:100%;height:100%;object-fit:cover;background:#000}
#localVideo{position:absolute;right:14px;top:14px;width:124px;height:172px;object-fit:cover;
  border-radius:14px;border:2px solid rgba(255,255,255,.35);background:#111;z-index:2}
.call-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,.7);font-size:14px;text-align:center;padding:20px}
.call-ctrls{display:flex;gap:16px;justify-content:center;padding:18px 0 max(22px, env(safe-area-inset-bottom))}
.cbtn{width:58px;height:58px;border-radius:50%;background:rgba(255,255,255,.16);border:none;color:#fff;
  font-size:22px;display:flex;align-items:center;justify-content:center}
.cbtn.off{background:rgba(255,255,255,.5);color:#16233a}
.cbtn.end{background:#e0402f}
@media(max-width:760px){ #localVideo{width:94px;height:130px} .cbtn{width:54px;height:54px} }

/* ---------- incoming call ---------- */
.incoming{position:fixed;inset:0;background:rgba(10,16,28,.75);display:none;align-items:center;
  justify-content:center;z-index:80;backdrop-filter:blur(4px)}
.incoming.show{display:flex}
.incoming-card{background:#fff;border-radius:22px;padding:30px 28px;text-align:center;width:min(360px,92vw)}
.incoming-card .av{width:78px;height:78px;border-radius:50%;background:var(--blue);color:#fff;margin:0 auto 14px;
  display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:700}
.incoming-card h2{font-size:22px;color:var(--dark)}
.incoming-card p{color:var(--grey);font-size:13.5px;margin-top:4px}
.in-actions{display:flex;gap:12px;margin-top:22px}
.in-actions button{flex:1;border:none;border-radius:14px;padding:14px;font-size:15px;font-weight:600;color:#fff}
.in-actions .decline{background:#e0402f}
.in-actions .accept{background:var(--green)}

/* ---------- Kith AI ---------- */
.callbtns .ai{background:#f2ecff;border-color:#e0d4ff}
.composer .ai-draft{background:#f2ecff;border-color:#e0d4ff}
.suggest-btn{float:right;font-size:11px;font-weight:700;color:var(--violet);background:#f2ecff;
  border:1px solid #e0d4ff;border-radius:12px;padding:3px 9px;text-transform:none;letter-spacing:0}
.suggest-btn:disabled{opacity:.6}
.msg.thinking{background:#f2ecff;color:#5a3fd0;font-style:italic;font-size:12.5px;
  box-shadow:none;border:1px dashed #d9c9ff}
.ai-note{align-self:center;background:#f2ecff;border:1px solid #e0d4ff;color:#3f2a9c;font-size:12.5px;
  padding:10px 14px;border-radius:13px;max-width:88%;line-height:1.55;margin-top:4px}
.ai-note b{color:#4326c0}
.chip.active[data-cat="AI"]{background:var(--violet)}

/* ---------- auth overlay ---------- */
.auth{position:fixed;inset:0;background:linear-gradient(150deg,#16233a,#1f3559);display:none;
  align-items:center;justify-content:center;z-index:80;padding:20px}
.auth.show{display:flex}
.auth-card{background:#fff;width:min(400px,94vw);border-radius:20px;padding:30px 28px;text-align:center}
.auth-card .logo.big{width:56px;height:56px;border-radius:15px;background:linear-gradient(135deg,var(--blue),var(--violet));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:28px;margin:0 auto 16px}
.auth-card h2{font-size:23px;color:var(--dark)}
.auth-card p{color:var(--grey);font-size:13.5px;margin:8px 0 18px;line-height:1.5}
.auth-card input{width:100%;border:1px solid var(--line);border-radius:11px;padding:13px 15px;font-size:15px;outline:none;text-align:center}
.auth-card input:focus{border-color:var(--blue)}
.auth-card button{width:100%;margin-top:12px;background:var(--blue);color:#fff;border:none;border-radius:11px;padding:13px;font-size:15px;font-weight:600}
.auth-note{margin-top:14px;font-size:12.5px;color:var(--green);min-height:16px}
.auth-sep{margin:18px 0 10px;font-size:12.5px;color:var(--grey)}
#authCode{letter-spacing:6px;font-size:22px;font-weight:700;text-align:center}
.auth-hint{margin-top:12px;font-size:11.5px;color:var(--grey);line-height:1.5}
.handle-pill{font-size:11px;color:var(--blue);background:#eef4fd;padding:3px 9px;border-radius:10px;margin-left:2px}

/* ---------- install prompt ---------- */
.install-bar{position:fixed;left:12px;right:12px;bottom:max(12px, env(safe-area-inset-bottom));
  background:var(--dark);color:#fff;border-radius:15px;padding:12px 12px 12px 16px;
  display:none;align-items:center;gap:10px;z-index:65;font-size:13.5px;
  box-shadow:0 10px 34px rgba(10,18,32,.35)}
.install-bar.show{display:flex}
.install-bar span{flex:1;line-height:1.45}
.install-bar b{color:#9fc2f0}
.install-bar button{border:none;border-radius:10px;font-weight:600;font-size:12.5px}
.install-bar #installBtn{background:var(--blue);color:#fff;padding:9px 16px}
.install-bar #installClose{background:transparent;color:#8ea3bf;font-size:15px;padding:6px 8px}
@media(min-width:761px){ .install-bar{left:auto;right:20px;width:330px} }

/* ---------- toast ---------- */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--dark);
  color:#fff;font-size:13px;padding:10px 18px;border-radius:22px;opacity:0;transition:.3s;pointer-events:none;z-index:90}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- installed PWA: respect the notch / status bar ---------- */
@supports (padding: max(0px)) {
  .brand { padding-top: max(16px, env(safe-area-inset-top)); }
  .conv-head { padding-top: max(11px, env(safe-area-inset-top)); }
  .nav { padding-bottom: max(12px, env(safe-area-inset-bottom)); }
  .composer { padding-bottom: max(10px, env(safe-area-inset-bottom)); }
}

/* ---------- responsive (phones) ---------- */
@media (max-width:760px){
  .app{flex-direction:column}
  .sidebar{width:100%;flex:1}
  .main{position:fixed;inset:0;z-index:50;background:var(--bg);transform:translateX(100%);transition:transform .25s}
  .main.show{transform:none}
  .back{display:block}
  .msg{max-width:82%}
}