/* R4 unified messenger layer.  Loaded after R5; frozen public assets stay untouched. */
:root{--ns-navy:#01152D;--ns-orange:#FE5A03;--bg:#F4F6F8;--surface:#fff;--text:#111827;--muted:#6B7280;--line:#E5E7EB;--danger:#dc2626;--outgoing:#eef5fb;--shadow:0 8px 30px rgba(1,21,45,.10)}
.ns-messenger{background:var(--bg);color:var(--text)}
.ns-messenger button{font:inherit}
.ns-messenger .app-shell,.ns-messenger .chat-pane{background:var(--surface)}
.ns-messenger .topbar,.ns-messenger .chat-head{border-color:var(--line);background:rgba(255,255,255,.94);backdrop-filter:blur(12px)}
.ns-messenger .chat-head{min-height:64px}.ns-messenger .chat-title,.ns-messenger .conversation-title{color:var(--ns-navy)}
.ns-messenger .msg .bubble{box-shadow:0 1px 1px rgba(1,21,45,.05);border:1px solid rgba(17,24,39,.035)}
.ns-messenger .msg.mine .bubble{background:var(--outgoing);border-color:#d8e7f3}
.ns-messenger .msg:not(.mine) .bubble{background:#fff}
.ns-messenger .msg-foot,.ns-messenger .conversation-preview,.ns-messenger .chat-status{color:var(--muted)}
.ns-messenger .checks.seen{color:var(--ns-orange)}
.ns-messenger .unread,.ns-messenger .unread-badge{background:var(--ns-orange)!important;color:#fff!important}
.ns-messenger .conversation-row{border-radius:14px;margin:3px 8px;transition:background .16s ease,transform .16s ease}
.ns-messenger .conversation-row:hover,.ns-messenger .conversation-row.active{background:#f1f5f9}
.ns-messenger .composer{border-top:1px solid var(--line);background:#fff;padding-bottom:max(10px,env(safe-area-inset-bottom))}
.ns-messenger #message{border-radius:20px;background:#f5f7fa;border:1px solid transparent;transition:border-color .15s,box-shadow .15s}
.ns-messenger #message:focus{border-color:#bdcede;box-shadow:0 0 0 3px rgba(1,21,45,.07)}
.ns-messenger .send-btn,.ns-messenger .primary{background:var(--ns-navy)!important;color:#fff!important;border-color:var(--ns-navy)!important}
.ns-messenger .send-btn:hover,.ns-messenger .primary:hover{background:#08294c!important}
.ns-messenger .icon-btn,.ns-messenger .composer button{border-radius:50%}
.r4-caption{font-size:.93rem;line-height:1.65;margin:8px 0 1px;white-space:pre-wrap;color:var(--text)}
.r4-header-name{border:0;background:transparent;padding:4px 7px;border-radius:9px;color:var(--ns-navy);cursor:pointer;text-align:right}.r4-header-name:hover{background:#f1f5f9}
.r4-media-sheet{display:grid;gap:9px;padding:2px 0}.r4-media-sheet button,.r4-device-row,.r4-alert-row{display:flex;align-items:center;gap:12px;width:100%;text-align:right;border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px;color:var(--text)}
.r4-media-sheet button:hover,.r4-device-row:hover{background:#f8fafc}.r4-media-icon{width:38px;height:38px;display:grid;place-items:center;background:#eef4f8;color:var(--ns-navy);border-radius:12px;font-size:20px}.r4-media-sheet small,.r4-device-row small,.r4-device-row span{display:block;color:var(--muted);margin-top:3px}.r4-media-sheet b,.r4-device-row b{display:block;color:var(--text)}
.r4-selection{display:grid;gap:8px;margin:12px 0}.r4-file-row{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;background:#f8fafc;border-radius:12px;padding:9px}.r4-file-row b{display:block;font-size:.9rem;word-break:break-word}.r4-file-row small{color:var(--muted)}.r4-file-row button{color:var(--danger);border:0;background:transparent;padding:5px;cursor:pointer}.r4-file-row progress{width:100%;grid-column:1/-1;accent-color:var(--ns-orange)}
.r4-media-form textarea,.r4-media-form select{min-height:42px;resize:vertical;width:100%;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff;color:var(--text);font:inherit;box-sizing:border-box}.r4-media-form textarea{min-height:78px}.r4-media-form textarea:focus,.r4-media-form select:focus{outline:0;border-color:#bdcede;box-shadow:0 0 0 3px rgba(1,21,45,.07)}.r4-sheet-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:12px}.r4-sheet-actions .ghost{background:#fff;border:1px solid var(--line);color:var(--text)}
.r4-voice-card{display:grid;gap:12px;text-align:center;padding:14px}.r4-rec-timer{font-size:1.65rem;color:var(--ns-navy);font-variant-numeric:tabular-nums}.r4-voice-controls{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.r4-voice-controls button{min-width:94px}.r4-voice-live{width:15px;height:15px;border-radius:50%;background:var(--danger);display:inline-block;animation:r4pulse 1.1s infinite}@keyframes r4pulse{50%{transform:scale(.75);opacity:.55}}
.r4-devices-intro{color:var(--muted);font-size:.9rem;line-height:1.65}.r4-device-list,.r4-alert-list{display:grid;gap:8px;margin:12px 0}.r4-device-row{align-items:flex-start}.r4-device-row.current{border-color:#b8cce0;background:#f4f9fd}.r4-device-row>div{min-width:0;flex:1}.r4-device-row .r4-device-meta{font-size:.79rem}.r4-device-actions{display:flex;gap:6px;align-items:center}.r4-device-actions button,.r4-inline-btn{border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 9px;cursor:pointer;color:var(--ns-navy);white-space:nowrap}.r4-inline-btn.danger{color:var(--danger);border-color:#fecaca}.r4-current-badge{color:#0f766e;background:#ccfbf1;border-radius:999px;font-size:.75rem;padding:4px 8px;white-space:nowrap}.r4-push-state{font-size:.78rem;color:var(--muted)}
.r4-contact-form{display:grid;gap:10px}.r4-contact-form .r4-two{display:grid;grid-template-columns:1fr 1fr;gap:8px}.r4-contact-form input,.r4-contact-form textarea{border:1px solid var(--line);border-radius:10px;padding:10px;width:100%;box-sizing:border-box;font:inherit}.r4-contact-form textarea{resize:vertical;min-height:72px}.r4-contact-form input:focus,.r4-contact-form textarea:focus{outline:0;border-color:#bdcede;box-shadow:0 0 0 3px rgba(1,21,45,.07)}.r4-contact-note{font-size:.77rem;color:var(--muted);display:block;margin-top:2px}
.r4-media-viewer{position:fixed;inset:0;background:rgba(1,21,45,.96);z-index:90;display:grid;grid-template-rows:auto 1fr;padding:max(14px,env(safe-area-inset-top)) 14px max(14px,env(safe-area-inset-bottom));direction:rtl}.r4-media-viewer-head{display:flex;align-items:center;justify-content:space-between;color:#fff;gap:10px}.r4-media-viewer-head button,.r4-media-viewer-head a{color:#fff;border:1px solid rgba(255,255,255,.4);background:transparent;border-radius:10px;padding:7px 10px;text-decoration:none}.r4-media-viewer figure{min-height:0;display:grid;place-items:center;margin:0}.r4-media-viewer img{max-width:100%;max-height:calc(100vh - 98px);object-fit:contain;border-radius:8px}.r4-media-viewer figcaption{color:#fff;align-self:end;text-align:center;max-width:80ch;padding:9px}
.r4-security-dot{width:9px;height:9px;background:var(--ns-orange);border-radius:50%;display:inline-block;margin-inline-start:5px}.r4-alert-row{align-items:flex-start}.r4-alert-row p{margin:2px 0;color:var(--muted);font-size:.85rem}.r4-alert-row time{font-size:.75rem;color:var(--muted)}
.r4-menu-icon{width:19px;display:inline-grid;place-items:center;color:var(--ns-navy)}.r4-attachment-loading{opacity:.68;pointer-events:none}.r4-upload-status{font-size:.8rem;color:var(--muted);margin-top:4px}
@media(max-width:700px){.ns-messenger .chat-pane{min-height:100dvh}.ns-messenger .conversation-row{margin-inline:4px}.r4-contact-form .r4-two{grid-template-columns:1fr}.r4-media-viewer{padding-inline:8px}.r4-device-row{padding:10px}.r4-device-actions{flex-direction:column;align-items:stretch}.r4-device-actions button{padding:6px}.r4-sheet-actions{position:sticky;bottom:0;background:#fff;padding-top:9px}}
@media(min-width:701px){.ns-messenger .app-shell{box-shadow:var(--shadow);border:1px solid var(--line);border-radius:16px;overflow:hidden}.ns-messenger .conversation-row{margin-inline:10px}.r4-media-viewer{padding-inline:6vw}}