:root{--bg:#f6f7f9;--panel:#fff;--line:#e5e7eb;--text:#111827;--muted:#6b7280;--brand:#2563eb;--brand-bg:#eff4ff;--out:#2563eb;--in:#f1f3f5;
--fb:#1877f2;--ig:#c13584;--wa:#1fa855;--li:#0a66c2;--x:#111}
@media(prefers-color-scheme:dark){:root{--bg:#0f1115;--panel:#171a21;--line:#2a2f3a;--text:#e8eaed;--muted:#8b93a1;--brand:#5b8def;--brand-bg:#1c2640;--in:#232833;--x:#e8eaed}}
*{box-sizing:border-box}body{margin:0;font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}
.hidden{display:none!important}.muted{color:var(--muted)}.err{color:#dc2626;min-height:18px;font-size:13px}
button{font:inherit;cursor:pointer}input,textarea,select{font:inherit;color:inherit;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%}
input:focus,textarea:focus,select:focus{outline:2px solid var(--brand);outline-offset:-1px}
.btn{border:1px solid var(--line);background:var(--panel);color:var(--text);padding:8px 14px;border-radius:8px}.btn:hover{background:var(--bg)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}.btn.primary:hover{filter:brightness(1.08)}
.btn.small{padding:5px 10px;font-size:13px}.btn.ghost{background:transparent}.btn.danger{color:#dc2626}
.icon{width:28px;height:28px;border-radius:8px;border:1px solid var(--line);background:var(--panel);color:var(--text);font-size:18px;line-height:1}
.login{display:grid;place-items:center;height:100vh}.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;width:min(380px,92vw);display:grid;gap:12px}
.card h1,.card h2{margin:0}
.app{display:grid;grid-template-columns:260px 360px 1fr;height:100vh}
.clients,.list{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.side-head{display:flex;justify-content:space-between;align-items:center;padding:14px 14px 8px}
.search{margin:0 12px 8px;width:calc(100% - 24px)}
ul{list-style:none;margin:0;padding:0;overflow:auto;flex:1}
#clientList li{display:flex;justify-content:space-between;align-items:center;padding:9px 14px;cursor:pointer;border-left:3px solid transparent;gap:8px}
#clientList li:hover{background:var(--bg)}#clientList li.on{background:var(--brand-bg);border-left-color:var(--brand);font-weight:600}
#clientList .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.dots{display:flex;gap:3px;margin-top:3px}
.dot{width:7px;height:7px;border-radius:50%}
.badge{background:var(--brand);color:#fff;border-radius:999px;font-size:11px;padding:1px 7px;font-weight:600;min-width:20px;text-align:center}
.side-foot{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--line)}
.list-head{padding:14px 12px 4px;border-bottom:1px solid var(--line)}.list-head .search{margin:8px 0}
.title-row{display:flex;justify-content:space-between;align-items:center;gap:8px}.title-row h2{font-size:17px}
.filters{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-top:8px}
.chip{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:999px;padding:3px 10px;font-size:12px}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}.seg button{border:0;background:var(--panel);color:var(--text);padding:4px 10px;font-size:12px}
.seg button.on{background:var(--brand);color:#fff}.chk{display:flex;gap:4px;align-items:center;font-size:12px;color:var(--muted)}.chk input{width:auto}
#threadList li{padding:11px 14px;border-bottom:1px solid var(--line);cursor:pointer}
#threadList li:hover{background:var(--bg)}#threadList li.on{background:var(--brand-bg)}
.trow{display:flex;justify-content:space-between;gap:8px;align-items:baseline}.who{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.unread .who{font-weight:700}.unread::before{content:"";float:left;width:8px;height:8px;background:var(--brand);border-radius:50%;margin:6px 8px 0 -4px}
.time{font-size:12px;color:var(--muted);white-space:nowrap}.prev{color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:2px}
.meta{display:flex;gap:6px;align-items:center;margin-top:5px;font-size:11px;color:var(--muted)}
.pf{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:5px;color:#fff;font-size:10px;font-weight:700}
.pf.facebook{background:var(--fb)}.pf.instagram{background:var(--ig)}.pf.whatsapp{background:var(--wa)}.pf.linkedin{background:var(--li)}.pf.x{background:var(--x);color:var(--bg)}
.tag{border:1px solid var(--line);border-radius:4px;padding:0 5px}
.convo{display:flex;flex-direction:column;min-width:0;min-height:0}.empty{margin:auto;color:var(--muted)}
.c-head{padding:14px 20px;border-bottom:1px solid var(--line);background:var(--panel);display:flex;justify-content:space-between;gap:12px;align-items:center}
.c-head h3{margin:0;font-size:16px}.c-ctx{background:var(--brand-bg);padding:8px 20px;font-size:13px;color:var(--muted);border-bottom:1px solid var(--line)}
.msgs{flex:1;overflow:auto;padding:20px;display:flex;flex-direction:column;gap:10px}
.m{max-width:72%;padding:9px 13px;border-radius:14px;background:var(--in);white-space:pre-wrap;word-break:break-word}
.m.out{align-self:flex-end;background:var(--out);color:#fff}.m small{display:block;opacity:.7;font-size:11px;margin-top:3px}
.reply{padding:12px 20px;border-top:1px solid var(--line);background:var(--panel);display:grid;gap:8px}
.reply textarea{resize:vertical;min-height:70px}.reply .row{display:flex;justify-content:space-between;align-items:center;gap:8px}
.modal{position:fixed;inset:0;background:#0007;display:grid;place-items:center;z-index:10;overflow:auto;padding:20px}.modal .card{width:min(560px,94vw)}
.acc{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 0;border-bottom:1px solid var(--line)}
.acc .e{color:#dc2626;font-size:12px}.grid2{display:grid;gap:8px}
@media(max-width:1000px){.app{grid-template-columns:200px 300px 1fr}}
@media(max-width:760px){.app{grid-template-columns:1fr;height:auto}.clients,.list{max-height:40vh}.convo{min-height:60vh}}