:root{
  --bg:#15171a; --panel:#1d2024; --panel2:#23262b; --text:#ececec;
  --muted:#a8b0ba; --accent:#5fb3ff; --green:#7ee787; --line:#30353c; --bad:#ff7b72;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--text);font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:18px;line-height:1.55}
.hidden{display:none !important}
.muted{color:var(--muted)}
.err{color:var(--bad);margin-top:10px;min-height:22px;font-size:15px}
button{cursor:pointer;font-size:16px}
.link{background:none;border:none;color:var(--accent);text-decoration:underline}

/* login */
.login-wrap{display:flex;align-items:center;justify-content:center;height:100%}
.login-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:32px 30px;width:360px}
.login-card h1{margin:0 0 4px;font-size:26px}
.login-card label{display:block;margin:16px 0 0;font-size:15px;color:var(--muted)}
.login-card input{width:100%;margin-top:6px;padding:11px 12px;border-radius:8px;border:1px solid var(--line);background:#0e1013;color:var(--text);font-size:17px}
.login-card button[type=submit]{width:100%;margin-top:22px;padding:12px;border-radius:8px;border:none;background:var(--accent);color:#04121f;font-weight:700}

/* app shell */
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid var(--line);background:linear-gradient(135deg,#1b2733,#15171a)}
.brand{font-weight:700;font-size:20px}
.who{font-size:15px;color:var(--muted);display:flex;gap:14px;align-items:center}
.notif{position:relative;display:flex;gap:4px;align-items:center}
.iconbtn{background:none;border:none;color:var(--muted);font-size:18px;cursor:pointer;position:relative;padding:4px 6px;line-height:1}
.iconbtn:hover{color:var(--text)}
.bell-count{position:absolute;top:-3px;right:-3px;background:var(--bad);color:#fff;border-radius:10px;font-size:10.5px;font-weight:700;padding:0 5px;min-width:16px;text-align:center;line-height:16px}
.settings-pop{position:absolute;top:40px;right:0;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:12px 14px;z-index:30;min-width:190px;box-shadow:0 10px 34px rgba(0,0,0,.55)}
.settings-pop .sp-title{font-weight:700;font-size:13px;margin-bottom:8px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
.settings-pop label{display:flex;align-items:center;gap:9px;padding:7px 0;font-size:15px;color:var(--text);cursor:pointer}
.settings-pop input{width:17px;height:17px}
#app{display:flex;flex-direction:column;height:100vh;overflow:hidden}
.layout{display:flex;flex:1;min-height:0}
.list-pane{width:360px;border-right:1px solid var(--line);display:flex;flex-direction:column;background:var(--panel)}
.list-head{display:flex;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--line);font-weight:600}
.tabs{display:flex;border-bottom:1px solid var(--line);background:var(--panel)}
.tab{flex:1;background:none;border:none;color:var(--muted);padding:11px 6px;font-size:14.5px;border-bottom:2px solid transparent}
.tab:hover{color:var(--text)}
.tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:700}
.tab .tcount{font-size:12.5px;opacity:.8}
.unb{display:inline-block;background:var(--bad);color:#fff;border-radius:10px;padding:0 6px;font-size:11px;font-weight:700;margin-left:2px}
.conv.unread{background:rgba(95,179,255,.06)}
.conv.unread .cname{font-weight:800;color:#fff}
.conv.unread .preview{color:var(--text)}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-right:7px;vertical-align:middle}
.chip{display:inline-block;font-size:11px;font-weight:700;border-radius:4px;padding:1px 6px;margin-right:6px;vertical-align:middle}
.chip-rc{background:#15324d;color:#7ec8ff}
.chip-ghl{background:#163a2a;color:#7ee0a8}
.chip-uni{background:#3a2f12;color:#ffcc66}
.conv-list{overflow-y:auto;flex:1}
.conv{padding:12px 16px;border-bottom:1px solid var(--line);cursor:pointer}
.conv:hover{background:var(--panel2)}
.conv.active{background:#15324d}
.conv .row1{display:flex;justify-content:space-between;gap:8px}
.conv .cname{font-weight:600}
.conv .ctime{font-size:13px;color:var(--muted);white-space:nowrap}
.conv .preview{color:var(--muted);font-size:15px;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conv .biz{margin-top:6px;font-size:13px}
.badge{display:inline-block;background:#15324d;color:var(--accent);border-radius:20px;padding:2px 9px;font-size:12.5px;font-weight:700}
.badge.unmatched{background:#3a2f12;color:#ffcc66}

/* thread */
.thread-pane{flex:1;display:flex;flex-direction:column}
.empty{display:flex;align-items:center;justify-content:center;height:100%;color:var(--muted)}
.thread{display:flex;flex-direction:column;height:100%;position:relative}
.thread-head{display:flex;justify-content:space-between;align-items:flex-start;padding:14px 20px;border-bottom:1px solid var(--line);background:var(--panel)}
.th-name{font-weight:700;font-size:19px}
.th-phone{font-size:14px}
.th-tag{text-align:right}
.th-tag .muted{display:block;font-size:13px;margin-top:4px}
.messages{flex:1;overflow-y:auto;padding:18px 20px;display:flex;flex-direction:column;gap:10px}
.msg{max-width:74%;padding:9px 13px;border-radius:12px;font-size:16px;white-space:pre-wrap;word-break:break-word}
.msg.in{align-self:flex-start;background:var(--panel2);border:1px solid var(--line)}
.msg.out{align-self:flex-end;background:#15324d;color:#eaf4ff}
.msg .meta{display:block;font-size:11.5px;color:var(--muted);margin-top:4px}
.reply{display:flex;gap:10px;padding:14px 20px;border-top:1px solid var(--line);background:var(--panel)}
.reply textarea{flex:1;resize:vertical;padding:11px 12px;border-radius:8px;border:1px solid var(--line);background:#0e1013;color:var(--text);font-size:16px;font-family:inherit}
.reply button{padding:0 22px;border-radius:8px;border:none;background:var(--accent);color:#04121f;font-weight:700}
.reply button:disabled{opacity:.5;cursor:default}
.send-status{padding:0 20px 12px;font-size:14px;min-height:20px}
.send-status.ok{color:var(--green)}
.send-status.bad{color:var(--bad)}

/* mobile back button (hidden on desktop) */
.back-btn{display:none;background:none;border:none;color:var(--accent);font-size:32px;line-height:1;padding:0 14px 0 0;margin-top:-2px}

/* phones: stack to one pane, slide the thread over the list */
@media (max-width:768px){
  .layout{position:relative}
  .list-pane{width:100%;border-right:none}
  .thread-pane{position:absolute;inset:0;background:var(--bg);transform:translateX(100%);transition:transform .22s ease;z-index:5}
  body.thread-open .thread-pane{transform:translateX(0)}
  .back-btn{display:block}
  .msg{max-width:88%}
  .reply{padding-bottom:calc(14px + env(safe-area-inset-bottom))}
  .tab{font-size:14px}
  .cpanel{width:100%}
}

/* full-width top tab bar */
.topnav{display:flex;align-items:stretch;background:var(--panel);border-bottom:1px solid var(--line)}
.topnav .tab{flex:1;background:none;border:none;color:var(--muted);padding:14px 8px;font-size:16.5px;border-bottom:3px solid transparent;cursor:pointer;text-align:center}
.topnav .tab:hover{color:var(--text)}
.topnav .tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:700;background:rgba(95,179,255,.05)}
.topnav .tcount{font-size:13px;opacity:.85}
.topnav .rfs{flex:0 0 auto;background:none;border:none;color:var(--accent);font-size:21px;padding:0 18px;cursor:pointer}

/* clickable name + contact details panel */
.th-name{cursor:pointer}
.th-name:hover{text-decoration:underline}
.cpanel{position:absolute;top:0;right:0;bottom:0;width:360px;max-width:100%;background:var(--panel);border-left:1px solid var(--line);transform:translateX(100%);transition:transform .22s ease;z-index:10;overflow-y:auto;padding:18px 20px}
.thread.show-contact .cpanel{transform:translateX(0)}
.cp-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.cp-close{background:none;border:none;color:var(--muted);font-size:28px;cursor:pointer;line-height:1}
.cp-name{font-size:21px;font-weight:800;margin-bottom:16px;color:#fff}
.cp-rows .row{display:flex;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:15.5px}
.cp-rows .row span{flex:0 0 92px;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.3px;padding-top:2px}
.cp-rows .row div{flex:1}