:root{
  --brand:#0f766e;--brand-d:#115e59;--brand-l:#ccfbf1;--accent:#14b8a6;
  --bg:#f0f2f5;--panel:#fff;--panel2:#f7f8fa;--line:#e3e6ea;--text:#111b21;--mute:#667781;
  --out:#d9fdd3;--in:#fff;--wall:#efeae2;--wall-dot:#e2dbd0;--read:#34b7f1;--danger:#dc2626;--warn:#f59e0b;
  --prem:#f5c542;--vip:#7c3aed;--shadow:0 1px 1px rgba(11,20,26,.08),0 2px 6px rgba(11,20,26,.06);
  --radius:10px;color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0b141a;--panel:#111b21;--panel2:#202c33;--line:#2a3942;--text:#e9edef;--mute:#8696a0;
  --out:#005c4b;--in:#202c33;--wall:#0b141a;--wall-dot:#16232b;--brand-l:#134e4a;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0b141a;--panel:#111b21;--panel2:#202c33;--line:#2a3942;--text:#e9edef;--mute:#8696a0;
  --out:#005c4b;--in:#202c33;--wall:#0b141a;--wall-dot:#16232b;--brand-l:#134e4a;color-scheme:dark}
*{box-sizing:border-box}html,body{height:100%;margin:0}
body{font:14.5px/1.4 system-ui,"Segoe UI",Roboto,"Noto Sans Tamil","Noto Sans Devanagari",sans-serif;background:var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--brand)}
.hidden{display:none!important}
.row{display:flex}.col{display:flex;flex-direction:column}.grow{flex:1;min-width:0;min-height:0}.scroll{overflow:auto}
.mute{color:var(--mute);font-size:12.5px}.trunc{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.btn{border:0;border-radius:8px;padding:8px 14px;cursor:pointer;background:var(--panel2);font-size:13.5px;display:inline-flex;align-items:center;gap:6px;justify-content:center}
.btn:hover{filter:brightness(.97)}.btn:disabled{opacity:.55;cursor:default}
.btn.p{background:var(--brand);color:#fff}.btn.d{background:var(--danger);color:#fff}.btn.sm{padding:5px 10px;font-size:12.5px}.btn.full{width:100%}
.icon{border:0;background:transparent;cursor:pointer;width:40px;height:40px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:var(--mute);font-size:19px;flex:none}
.icon:hover{background:var(--panel2)}
.icon svg{width:22px;height:22px;fill:currentColor}
input,select,textarea{padding:10px 12px;border-radius:8px;border:1px solid var(--line);background:var(--panel);width:100%;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}
label.f{display:block;font-weight:600;font-size:13px;margin:16px 0 6px}label.f small{font-weight:400;color:var(--mute)}
.pill{display:inline-block;font-size:11px;padding:2px 8px;border-radius:10px;background:var(--panel2);margin:2px 3px 0 0;white-space:nowrap}
.cat-New{background:#e0f2fe;color:#075985}.cat-Regular{background:#dcfce7;color:#166534}.cat-Premium{background:#fef3c7;color:#92400e}.cat-VIP{background:#ede9fe;color:#5b21b6}
.st-New{background:#dbeafe;color:#1e40af}.st-Open,.st-In{background:#fef3c7;color:#92400e}.st-Waiting,.st-Pending{background:#fde68a;color:#78350f}.st-Resolved{background:#dcfce7;color:#166534}.st-Closed{background:#e5e7eb;color:#374151}
.pr-Urgent{background:#fee2e2;color:#991b1b}.pr-High{background:#ffedd5;color:#9a3412}.pr-Normal{background:#e5e7eb;color:#374151}.pr-Low{background:#f1f5f9;color:#64748b}
.badge{min-width:20px;height:20px;padding:0 6px;border-radius:10px;background:var(--accent);color:#fff;font-size:11.5px;font-weight:600;display:inline-flex;align-items:center;justify-content:center}
.av{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;flex:none;position:relative;font-size:15px}
.av.on::after{content:"";position:absolute;right:0;bottom:0;width:11px;height:11px;border-radius:50%;background:#22c55e;border:2px solid var(--panel)}

/* chips (checkbox / radio pills) */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{position:relative}.chip input{position:absolute;opacity:0;pointer-events:none}
.chip span{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:20px;border:1.5px solid var(--line);background:var(--panel);cursor:pointer;font-size:14px;user-select:none}
.chip input:checked+span{border-color:var(--brand);background:var(--brand-l);color:var(--brand-d);font-weight:600}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .chip input:checked+span,:root:not([data-theme="light"]) .filters button.on{color:#99f6e4}}
:root[data-theme="dark"] .chip input:checked+span,:root[data-theme="dark"] .filters button.on{color:#99f6e4}
.chip input:focus-visible+span{outline:2px solid var(--brand)}

/* chat surface */
.wall{background-color:var(--wall);background-image:radial-gradient(var(--wall-dot) 1px,transparent 1.2px);background-size:22px 22px}
.msgs{padding:10px 6% 14px;display:flex;flex-direction:column;gap:2px}
.date-sep{align-self:center;background:var(--panel);color:var(--mute);font-size:12px;padding:5px 12px;border-radius:8px;margin:10px 0 6px;box-shadow:var(--shadow);position:sticky;top:6px;z-index:1}
.sys{align-self:center;background:#fff5c4;color:#54480a;font-size:12.5px;padding:6px 12px;border-radius:8px;margin:6px 0;max-width:85%;text-align:center}
@media (prefers-color-scheme:dark){.sys{background:#2a2a1a;color:#e8dca0}}
.b{max-width:min(76%,560px);padding:6px 8px 8px 9px;border-radius:var(--radius);box-shadow:var(--shadow);position:relative;word-wrap:break-word;white-space:pre-wrap;margin-top:2px}
.b.first{margin-top:8px}
.b.out{align-self:flex-end;background:var(--out)}.b.in{align-self:flex-start;background:var(--in)}
.b.first.out{border-top-right-radius:0}.b.first.in{border-top-left-radius:0}
.b.first.out::before,.b.first.in::before{content:"";position:absolute;top:0;width:8px;height:13px}
.b.first.out::before{right:-8px;background:var(--out);clip-path:polygon(0 0,100% 0,0 100%)}
.b.first.in::before{left:-8px;background:var(--in);clip-path:polygon(0 0,100% 0,100% 100%)}
.b .who{font-size:12px;font-weight:600;color:var(--brand);margin-bottom:2px}
.b.out .who{color:inherit;opacity:.65}
.b.card-msg{border-left:4px solid var(--accent);min-width:min(260px,70vw)}
.ktag{font-size:11px;font-weight:700;letter-spacing:.3px;color:var(--accent);text-transform:uppercase;margin-bottom:3px}
.offer{background:var(--panel);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:12px}
.offer img{width:100%;max-height:260px;object-fit:cover;display:block}.offer .in{padding:12px 14px;white-space:pre-wrap}
.seg3{display:flex;background:var(--panel2);border-radius:10px;padding:4px;gap:4px}
.seg3 button{flex:1;border:0;background:none;padding:9px;border-radius:8px;cursor:pointer;color:var(--mute);font-weight:600}
.seg3 button.on{background:var(--panel);color:var(--brand);box-shadow:var(--shadow)}
.ver{font-size:11px;color:var(--mute)}
.b .meta{float:right;margin:6px 0 -4px 10px;font-size:11px;color:var(--mute);display:inline-flex;gap:3px;align-items:center;white-space:nowrap;position:relative;top:4px}
.tick{width:16px;height:11px}.tick.read{color:var(--read)}
.b.deleted{font-style:italic;color:var(--mute)}
.b .media{margin:-2px -4px 4px;border-radius:7px;overflow:hidden;cursor:pointer;background:#0001;min-height:60px}
.b .media img,.b .media video{display:block;max-width:100%;max-height:340px;width:auto}
.doc{display:flex;gap:10px;align-items:center;padding:10px;border-radius:8px;background:color-mix(in srgb,var(--text) 6%,transparent);margin:-2px -4px 4px;text-decoration:none;color:inherit;min-width:220px}
.doc .ext{width:38px;height:44px;border-radius:5px;background:#e74c3c;color:#fff;font-size:11px;font-weight:700;display:flex;align-items:flex-end;justify-content:center;padding-bottom:6px;flex:none}
.doc .ext.word{background:#2b579a}.doc .ext.xls{background:#217346}.doc .ext.other{background:#64748b}
.quote{border-left:4px solid var(--accent);background:color-mix(in srgb,var(--text) 6%,transparent);border-radius:6px;padding:5px 8px;margin:0 -2px 5px;font-size:12.5px;cursor:pointer;white-space:normal}
.quote b{display:block;color:var(--accent);font-size:12px}
.b .more{position:absolute;top:2px;right:2px;opacity:0;border:0;background:inherit;border-radius:50%;cursor:pointer;color:var(--mute);width:24px;height:24px;font-size:14px}
.b:hover .more{opacity:1}
.b.flash{animation:flash 1.2s}@keyframes flash{30%{box-shadow:0 0 0 4px var(--accent)}}
mark{background:#fde047;color:inherit;border-radius:2px}
.typing{display:inline-flex;gap:3px;align-items:center}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--mute);animation:bl 1.2s infinite}.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
@keyframes bl{0%,60%,100%{opacity:.3}30%{opacity:1}}

/* composer */
.composer{display:flex;align-items:flex-end;gap:4px;padding:8px 10px;background:var(--panel2);position:relative}
.composer textarea{resize:none;border:0;border-radius:20px;padding:10px 14px;max-height:140px;min-height:42px;background:var(--panel);line-height:1.35}
.composer textarea:focus{box-shadow:none}
.send{width:44px;height:44px;border-radius:50%;border:0;background:var(--brand);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;flex:none}
.send svg{width:22px;height:22px;fill:#fff}
.replybar{display:flex;align-items:center;gap:8px;padding:8px 12px 0;background:var(--panel2)}
.replybar .quote{flex:1;margin:0}
.upbar{padding:6px 14px;background:var(--panel2);font-size:12.5px}
.upbar .track{height:4px;border-radius:2px;background:var(--line);overflow:hidden;margin-top:4px}.upbar .track i{display:block;height:100%;background:var(--brand);width:0;transition:width .15s}
.emoji{position:absolute;bottom:62px;left:8px;width:min(340px,calc(100vw - 16px));background:var(--panel);border-radius:12px;box-shadow:0 8px 30px #0003;padding:8px;z-index:20}
.emoji .tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);margin-bottom:6px}
.emoji .tabs button{flex:1;border:0;background:none;font-size:18px;padding:4px;cursor:pointer;border-bottom:2px solid transparent}
.emoji .tabs button.on{border-color:var(--brand)}
.emoji .grid{display:grid;grid-template-columns:repeat(8,1fr);max-height:220px;overflow:auto}
.emoji .grid button{border:0;background:none;font-size:23px;padding:4px;cursor:pointer;border-radius:6px}.emoji .grid button:hover{background:var(--panel2)}

/* menus, modals, lightbox, toasts */
.menu{position:fixed;background:var(--panel);border-radius:8px;box-shadow:0 6px 24px #0003;padding:6px 0;z-index:50;min-width:170px}
.menu button{display:block;width:100%;text-align:left;border:0;background:none;padding:9px 18px;cursor:pointer;font-size:14px}.menu button:hover{background:var(--panel2)}
.menu button.d{color:var(--danger)}
.modal{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:60;padding:12px}
.modal>.box{background:var(--panel);border-radius:14px;padding:20px;width:min(520px,100%);max-height:92vh;overflow:auto}
.modal h3{margin:0 0 6px}
.lightbox{position:fixed;inset:0;background:#000e;z-index:70;display:flex;flex-direction:column}
.lightbox .bar{display:flex;justify-content:flex-end;gap:6px;padding:8px}.lightbox .bar .icon{color:#fff}
.lightbox .stage{flex:1;display:flex;align-items:center;justify-content:center;min-height:0;padding:0 10px 20px}
.lightbox img,.lightbox video{max-width:100%;max-height:100%;object-fit:contain}
.toast{position:fixed;bottom:84px;left:50%;transform:translateX(-50%);background:#323232;color:#fff;padding:10px 18px;border-radius:8px;z-index:90;font-size:13.5px;max-width:90vw}
.card{background:var(--panel);border-radius:12px;padding:14px;box-shadow:var(--shadow)}
.err{color:var(--danger);font-size:13px;margin-top:8px;min-height:1em}