:root{--blue:#3390ec;--blue2:#2a82d8;--text:#111;--muted:#707579;--line:#e6e6e6;--search:#f4f4f5;--wall:#dfe7eb;--in:#fff;--out:#e8ffd8;--danger:#e53935;--shadow:0 1px 2px rgba(16,35,45,.15)}
*{box-sizing:border-box}html,body,.app-root{width:100%;height:100%;margin:0}body{overflow:hidden;background:#fff;color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif}.app-root{height:100dvh}.hidden{display:none!important}button,input,textarea{font:inherit}.icon{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}.icon-btn{width:40px;height:40px;border:0;border-radius:50%;display:grid;place-items:center;background:transparent;color:#707579;cursor:pointer}.icon-btn:hover{background:#f1f2f3}.toast{position:fixed;left:50%;bottom:28px;z-index:1000;transform:translateX(-50%) translateY(20px);opacity:0;padding:9px 14px;border-radius:20px;background:rgba(30,35,39,.9);color:#fff;font-size:13px;pointer-events:none;transition:.18s}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.toast.error{background:#b3261e}

/* Login/profile: Telegram-style clean auth, NanoSys branding */
.auth-screen{height:100dvh;display:grid;place-items:center;padding:24px;background:#fff}.auth-card{width:min(390px,100%);text-align:center}.auth-logo{width:108px;height:108px;margin:0 auto 24px;border-radius:24px;display:grid;place-items:center;background:#fff;overflow:hidden}.auth-logo img{width:100%;height:100%;object-fit:contain;display:block}.auth-card h1{font-size:28px;margin:0 0 8px}.auth-card p{margin:0 auto 28px;color:var(--muted);font-size:14px;line-height:1.8;max-width:330px}.field{display:grid;gap:7px;text-align:right;margin:12px 0}.field span{font-size:13px;color:#555}.field input{width:100%;height:54px;border:1px solid #d9dfe3;border-radius:10px;padding:0 14px;outline:none;background:#fff}.field input:focus{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue)}.otp-input{text-align:center;letter-spacing:.38em;font-size:24px!important;direction:ltr}.primary{width:100%;height:50px;border:0;border-radius:10px;background:var(--blue);color:#fff;font-weight:700;cursor:pointer;margin-top:10px}.primary:hover{background:var(--blue2)}.ghost{width:100%;height:46px;border:1px solid #e2e6e8;border-radius:10px;background:#fff;color:#555;margin-top:10px}.ghost:disabled{opacity:.55}.auth-foot{margin-top:18px;color:var(--muted);font-size:12px}

/* Messenger shell */
.messenger{height:100dvh;display:grid;grid-template-columns:420px minmax(0,1fr);direction:ltr;background:#fff}.sidebar{position:relative;height:100%;min-width:0;display:grid;grid-template-rows:56px minmax(0,1fr);border-right:1px solid var(--line);background:#fff;direction:rtl}.topbar{height:56px;display:grid;grid-template-columns:42px minmax(0,1fr);align-items:center;gap:8px;padding:7px 10px;border-bottom:1px solid #f1f1f1}.searchbox{height:40px;border-radius:22px;background:var(--search);display:grid;grid-template-columns:24px minmax(0,1fr);align-items:center;gap:6px;padding:0 12px;color:#8b8f92}.searchbox input{border:0;background:transparent;outline:0;width:100%;height:38px;direction:rtl;color:#111;font-size:14px}.pane-body{position:relative;overflow:auto}.section-title{padding:12px 15px 7px;color:#7b8083;font-size:12px;font-weight:700}.chat-row,.search-row{width:100%;height:72px;border:0;background:#fff;display:grid;grid-template-columns:56px minmax(0,1fr);gap:10px;align-items:center;padding:6px 10px;text-align:right;color:inherit;cursor:pointer}.chat-row:hover,.search-row:hover{background:#f5f7f8}.chat-row.active{background:var(--blue);color:#fff}.avatar{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;color:#fff;background:linear-gradient(145deg,#62b0e9,#297bb8);font-size:21px;font-weight:800;overflow:hidden}.avatar img{width:100%;height:100%;object-fit:cover;display:block}.avatar.small{width:42px;height:42px;font-size:17px}.row-main{min-width:0;display:grid;gap:5px}.row-top,.row-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;min-width:0}.row-top b{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.row-top time{direction:ltr;font-size:11px;color:#8a8f93;white-space:nowrap}.preview{font-size:13px;color:#707579;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-row.active .preview,.chat-row.active time{color:rgba(255,255,255,.84)}.badge{min-width:21px;height:21px;padding:0 6px;border-radius:11px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:11px;font-weight:700}.chat-row.active .badge{background:#fff;color:var(--blue)}.fab{position:absolute;left:18px;bottom:20px;width:54px;height:54px;border:0;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;box-shadow:0 4px 14px rgba(51,144,236,.35);cursor:pointer}.fab:hover{background:var(--blue2)}
.menu{position:absolute;left:10px;top:50px;z-index:30;width:210px;padding:6px;border-radius:10px;background:#fff;box-shadow:0 5px 22px rgba(0,0,0,.18);direction:rtl}.menu button{width:100%;height:42px;border:0;border-radius:8px;background:transparent;text-align:right;padding:0 12px;display:flex;align-items:center;gap:10px;color:#222}.menu button:hover{background:#f3f4f5}.menu .danger{color:var(--danger)}

.chat-pane{height:100%;min-width:0;display:grid;grid-template-rows:56px minmax(0,1fr) auto;background:var(--wall);direction:rtl}.chat-empty{height:100%;display:grid;place-items:center;background-color:var(--wall);background-image:radial-gradient(rgba(83,106,114,.10) 1px,transparent 1px);background-size:18px 18px}.empty-chip{padding:7px 13px;border-radius:18px;background:rgba(70,84,91,.72);color:#fff;font-size:12px}.chat-head{height:56px;display:grid;grid-template-columns:40px minmax(0,1fr) auto;align-items:center;gap:8px;padding:6px 10px;background:#fff;border-bottom:1px solid var(--line)}.chat-head .back{display:none}.identity{display:flex;align-items:center;gap:9px;min-width:0}.identity-copy{min-width:0}.identity-copy h2{font-size:14px;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.identity-copy p{font-size:11px;color:var(--blue);margin:2px 0 0}.head-actions{display:flex;gap:2px}.messages{min-height:0;overflow:auto;padding:14px max(12px,calc((100% - 760px)/2));display:flex;flex-direction:column;gap:3px;background-color:var(--wall);background-image:radial-gradient(rgba(83,106,114,.10) 1px,transparent 1px);background-size:18px 18px}.msg{max-width:min(74%,620px);align-self:flex-start}.msg.mine{align-self:flex-end}.bubble{position:relative;min-width:68px;padding:7px 9px 5px;background:var(--in);border-radius:12px;box-shadow:var(--shadow);word-break:break-word;white-space:pre-wrap}.msg.mine .bubble{background:var(--out)}.bubble::after{content:"";position:absolute;bottom:0;left:-5px;width:10px;height:10px;background:var(--in);clip-path:polygon(100% 0,100% 100%,0 100%)}.msg.mine .bubble::after{left:auto;right:-5px;background:var(--out);clip-path:polygon(0 0,100% 100%,0 100%)}.msg-text{font-size:14px;line-height:1.45;padding-left:42px}.msg-foot{display:flex;justify-content:flex-end;align-items:center;gap:3px;color:#7b858a;font-size:10px;direction:ltr;margin-top:2px}.checks{color:#4c9ed7;letter-spacing:-2px;font-weight:700}.reply-quote{margin:0 0 5px;padding:5px 8px;border-right:3px solid var(--blue);background:rgba(51,144,236,.08);border-radius:5px;font-size:11px}.unread-sep{align-self:center;margin:8px auto;padding:4px 10px;border-radius:12px;background:rgba(77,94,102,.68);color:#fff;font-size:11px}.typing{position:absolute;right:12px;bottom:72px;padding:4px 9px;border-radius:12px;background:rgba(255,255,255,.86);font-size:11px;color:#52666f;box-shadow:var(--shadow)}
.composer-wrap{padding:7px max(10px,calc((100% - 760px)/2)) max(8px,env(safe-area-inset-bottom));background:transparent}.reply-bar{display:flex;justify-content:space-between;gap:8px;margin-bottom:6px;padding:7px 10px;border-radius:9px;background:#fff;border-right:3px solid var(--blue);box-shadow:var(--shadow);font-size:12px}.reply-bar button{border:0;background:transparent;color:#777}.composer{display:grid;grid-template-columns:42px minmax(0,1fr) 44px;align-items:end;gap:3px;padding:3px 4px;background:#fff;border-radius:24px;box-shadow:var(--shadow)}.composer textarea{width:100%;min-height:42px;max-height:130px;padding:10px 5px 7px;border:0;outline:0;resize:none;background:transparent;font-size:14px;line-height:1.45}.compose-btn{width:40px;height:40px;border:0;border-radius:50%;display:grid;place-items:center;background:transparent;color:#7d878b}.send{background:var(--blue);color:#fff}.file-card{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:210px}.file-card a{color:var(--blue);text-decoration:none}.file-card small{display:block;color:#78848a}

.modal-root{position:fixed;inset:0;z-index:100;background:rgba(0,0,0,.35);display:grid;place-items:center;padding:18px}.modal-root[hidden]{display:none}.modal-card{width:min(430px,100%);max-height:min(720px,88dvh);overflow:auto;background:#fff;border-radius:14px;box-shadow:0 15px 50px rgba(0,0,0,.25);padding:16px;direction:rtl}.modal-head{display:flex;align-items:center;justify-content:space-between}.modal-head h3{margin:0;font-size:18px}.modal-close{border:0;background:transparent;font-size:24px;color:#777}.modal-tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:12px 0}.modal-tabs button{height:40px;border:0;border-radius:8px;background:#f2f4f5}.modal-tabs button.active{background:var(--blue);color:#fff}.selected{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}.chip{padding:5px 9px;border-radius:14px;background:#eaf4fd;color:#236da9;font-size:12px}.search-results{max-height:320px;overflow:auto}.search-empty{padding:30px 14px;text-align:center;color:#81878a}.settings-grid{display:grid;gap:10px}.toggle-row{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:8px 0}

@media(max-width:900px){.messenger{grid-template-columns:360px minmax(0,1fr)}}
@media(max-width:760px){
  .messenger{display:block;height:100dvh}.sidebar{height:100dvh;border:0;padding-top:env(safe-area-inset-top)}.topbar{height:56px;padding:7px 8px}.chat-row,.search-row{height:72px}.chat-row:hover,.search-row:hover{background:#fff}.chat-row.active{background:#fff;color:#111}.chat-row.active .preview,.chat-row.active time{color:#707579}.chat-row.active .badge{background:var(--blue);color:#fff}.chat-pane{display:none}.messenger.chat-open .sidebar{display:none}.messenger.chat-open .chat-pane{display:grid;height:100dvh;padding-top:env(safe-area-inset-top)}.chat-head .back{display:grid}.chat-head{height:56px;padding:6px 6px}.head-actions .desktop-only{display:none}.messages{padding:9px 7px 11px}.msg{max-width:87%}.msg-text{font-size:14px;padding-left:38px}.composer-wrap{padding:5px 5px max(6px,env(safe-area-inset-bottom))}.composer{grid-template-columns:40px minmax(0,1fr) 42px;padding:2px 3px}.composer textarea{font-size:16px;min-height:40px}.fab{bottom:max(20px,calc(env(safe-area-inset-bottom) + 14px));left:17px}.auth-screen{padding:20px}.modal-root{align-items:end;padding:0}.modal-card{width:100%;max-height:88dvh;border-radius:16px 16px 0 0;padding-bottom:max(16px,env(safe-area-inset-bottom))}
}

/* UX1: profile photo + install surface */
.profile-avatar-wrap{display:grid;place-items:center;gap:9px;margin:6px 0 14px}.profile-avatar{width:96px;height:96px;border-radius:50%;overflow:hidden;display:grid;place-items:center;background:linear-gradient(145deg,#62b0e9,#297bb8);color:#fff;font-size:34px;font-weight:800;box-shadow:0 1px 4px rgba(0,0,0,.12)}.profile-avatar img{width:100%;height:100%;object-fit:cover;display:block}.avatar-pick{border:0;background:transparent;color:var(--blue);font-size:13px;font-weight:700;cursor:pointer}.brand-inline{display:inline-flex;align-items:center;gap:8px}.brand-inline img{width:28px;height:28px;object-fit:contain}.install-hint{font-size:12px;color:var(--muted);line-height:1.8;margin-top:8px}.menu button.install{color:#0a6f42}.auth-avatar-input{display:none}

/* Real message receipt state */
.checks{color:#8b9aa5}.checks.seen{color:#3390ec}


/* R5.01 — account-level NanoSys Contacts */
.contact-section-title{margin:13px 2px 7px;color:#747c81;font-size:11px;font-weight:800}
.contact-list{display:grid;gap:2px}.contact-row{min-height:66px;display:grid;grid-template-columns:54px minmax(0,1fr) auto;gap:9px;align-items:center;border-bottom:1px solid #eef1f3;padding:6px 2px}.contact-row .avatar{width:50px;height:50px;font-size:18px}.contact-main{min-width:0;border:0;background:transparent;text-align:right;padding:6px 2px;display:grid;gap:4px;cursor:pointer;color:inherit}.contact-main b{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.contact-main span{font-size:11px;color:#778186;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.contact-action{min-height:34px;border:0;border-radius:9px;background:#eaf4fd;color:#176cae;padding:6px 9px;display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:750;cursor:pointer}.contact-action .icon{width:16px;height:16px}.contact-action:disabled{opacity:.62;cursor:default}.danger-soft{background:#fff0f0;color:#b3261e}.contact-saved{font-size:10px;font-weight:750;color:#43845f;background:#edf8f1;border-radius:10px;padding:6px 8px;white-space:nowrap}.search-empty.compact{padding:18px 10px}
@media(max-width:760px){.contact-row{grid-template-columns:50px minmax(0,1fr) auto;min-height:62px}.contact-row .avatar{width:46px;height:46px}.contact-action{padding:6px 8px}}


/* R5.02A Conversation management */
.conversation-action-list{display:grid;gap:4px;margin-top:10px}
.conversation-action{width:100%;min-height:46px;border:0;border-radius:10px;background:#f5f7f8;color:#20272b;text-align:right;padding:10px 13px;font-weight:700}
.conversation-action:hover{background:#edf1f3}
.conversation-action.danger{color:#b3261e;background:#fff2f2}
.confirm-copy{margin:14px 0;color:#5f6a70;line-height:1.8;font-size:13px}
.confirm-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}
.danger-action{background:#c83f46!important}
.conversation-search-hit{width:100%;display:grid;gap:5px;border:0;border-bottom:1px solid #edf1f3;background:#fff;text-align:right;padding:11px 5px;color:#222}
.conversation-search-hit:hover{background:#f7fafb}
.conversation-search-meta{display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:11px;color:#778186}
.conversation-search-meta b{color:#27343a;font-size:12px}
.conversation-search-hit>span:last-child{font-size:13px;line-height:1.6;white-space:pre-wrap;word-break:break-word}
.message-focus .bubble{animation:r5-message-focus 1.8s ease}
@keyframes r5-message-focus{0%,100%{box-shadow:var(--shadow)}20%,70%{box-shadow:0 0 0 3px rgba(51,144,236,.32),var(--shadow)}}

.search-window-note{padding:8px 6px;color:#7b858b;font-size:11px;text-align:center;background:#f7f9fa;border-radius:8px;margin:4px 0 8px}

/* R5 Full Messenger */
.r5-msg-more{position:absolute;top:3px;left:2px;width:25px;height:25px;border:0;border-radius:50%;background:transparent;color:#7a8589;opacity:0;cursor:pointer;font-size:19px;line-height:1}.msg:hover .r5-msg-more,.msg:focus-within .r5-msg-more{opacity:1}.r5-reactions{display:flex;flex-wrap:wrap;gap:3px;margin:2px 5px 3px;direction:rtl}.r5-reaction,.r5-reaction-add{min-height:25px;border:1px solid #d8e2e7;border-radius:13px;background:#fff;padding:1px 7px;color:#506167;font-size:12px;cursor:pointer}.r5-reaction.mine{border-color:#7ec1ef;background:#e8f5ff}.r5-reaction b{font-size:10px}.r5-reaction-add{padding:0 8px;color:#56809a}.r5-forwarded,.r5-deleted{font-size:11px;color:#7b858b;margin:0 0 4px}.r5-deleted{font-style:italic;padding-left:28px}.msg.deleted .bubble{background:#f3f4f5}.r5-media-image{display:block;max-width:min(340px,100%);padding:0;border:0;border-radius:9px;overflow:hidden;background:#e9eef0;cursor:zoom-in}.r5-media-image img{display:block;width:100%;max-height:340px;object-fit:cover}.r5-media-video{display:block;width:min(360px,100%);max-height:320px;border-radius:9px;background:#1f2528}.r5-voice{min-width:220px;display:flex;align-items:center;gap:8px;direction:ltr}.r5-voice audio{width:100%;height:34px}.r5-voice small{font-size:10px;color:#738087;white-space:nowrap}.r5-pinned{position:absolute;z-index:5;top:56px;right:0;left:0;min-height:42px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px;align-items:center;border:0;border-bottom:1px solid #dde7ec;background:rgba(255,255,255,.96);padding:6px 14px;text-align:right;color:#42616f;cursor:pointer;box-shadow:0 2px 8px rgba(12,38,52,.08)}.r5-pinned b{font-size:11px;color:#2685c5}.r5-pinned span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:12px}.chat-head:has(+.r5-pinned)~.messages{padding-top:53px}.r5-voice-btn{font-size:17px}.r5-reaction-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}.r5-reaction-picker button{height:54px;border:1px solid #e2e8ea;border-radius:12px;background:#fff;font-size:26px;cursor:pointer}.r5-edit-text{width:100%;min-height:130px;resize:vertical;border:1px solid #d9e1e5;border-radius:10px;padding:10px;outline:0;line-height:1.7}.r5-forward-list{display:grid;gap:4px;max-height:360px;overflow:auto}.r5-forward-list button{min-height:58px;display:grid;grid-template-columns:44px minmax(0,1fr);align-items:center;gap:9px;border:0;border-radius:10px;background:#fff;text-align:right;color:#20272b;padding:5px;cursor:pointer}.r5-forward-list button:hover{background:#f3f7f9}.r5-forward-list .avatar{width:42px;height:42px;font-size:16px}.r5-preview-image{display:block;width:100%;max-height:65dvh;object-fit:contain;background:#111;border-radius:8px}.r5-voice-preview{width:100%;margin:18px 0}.r5-info-tabs{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;margin:14px 0}.r5-info-tabs button{min-height:40px;border:0;border-radius:9px;background:#eff4f6;color:#405560;font-size:12px;font-weight:700}.r5-shared-row{width:100%;display:grid;gap:4px;border:0;border-bottom:1px solid #edf1f2;background:#fff;text-align:right;color:#2879ad;text-decoration:none;padding:11px 4px;font-size:13px;word-break:break-word}.r5-shared-row small{color:#77858c;font-size:11px}.r5-info-tabs button:hover{background:#e2eff5}
@media(max-width:760px){.r5-msg-more{opacity:1}.r5-media-image{max-width:100%}.r5-media-video{width:100%}.r5-pinned{top:calc(56px + env(safe-area-inset-top));padding-left:10px;padding-right:10px}.chat-head:has(+.r5-pinned)~.messages{padding-top:55px}.r5-reaction-picker{grid-template-columns:repeat(4,1fr)}.r5-voice{min-width:190px}}

/* R5 Final Fix: explicit media composer, contact aliases and active-device UX */
.r5-attach-btn{color:#2b87c8}.r5-attach-btn.r5-recording{background:#e65a5a;color:#fff;font-size:18px;font-weight:800;animation:r5-record-pulse 1.2s ease-in-out infinite}@keyframes r5-record-pulse{50%{transform:scale(.92);opacity:.75}}
.r5-media-menu{display:grid;gap:8px;margin-top:14px}.r5-media-menu button{min-height:64px;display:grid;grid-template-columns:42px minmax(0,1fr);align-items:center;gap:10px;border:1px solid #e2e9ed;border-radius:12px;background:#fff;text-align:right;padding:8px 10px;font-size:22px;cursor:pointer}.r5-media-menu button:hover{background:#f4f8fa}.r5-media-menu span{display:grid;gap:3px;font-size:13px;color:#26343b}.r5-media-menu small{font-size:10px;color:#748087;font-weight:400}
.r5-device-list{display:grid;gap:8px;margin:12px 0}.r5-device-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;padding:11px;border:1px solid #e2e9ed;border-radius:12px;background:#fff}.r5-device-row.current{border-color:#8cc8ee;background:#f3faff}.r5-device-row>div{display:grid;gap:3px;min-width:0}.r5-device-row b{font-size:13px}.r5-device-row span,.r5-device-row small{font-size:10px;color:#708089}.r5-revoke-all{width:100%;margin-top:8px}
@media(max-width:760px){.r5-media-menu button{min-height:60px}.r5-device-row{padding:10px}}

/* NANOSYS_DESKTOP_SIDEBAR_RIGHT_V2 */
@media (min-width:901px){
  .messenger{
    grid-template-columns:minmax(0,1fr) 420px !important;
    direction:ltr !important;
  }
  .messenger>.sidebar{
    grid-column:2 !important;
    grid-row:1 !important;
    direction:rtl !important;
    border-right:0 !important;
    border-left:1px solid var(--line) !important;
  }
  .messenger>.chat-pane{
    grid-column:1 !important;
    grid-row:1 !important;
    direction:rtl !important;
  }
}

@media (min-width:761px) and (max-width:900px){
  .messenger{
    grid-template-columns:minmax(0,1fr) 360px !important;
    direction:ltr !important;
  }
  .messenger>.sidebar{
    grid-column:2 !important;
    grid-row:1 !important;
    direction:rtl !important;
    border-right:0 !important;
    border-left:1px solid var(--line) !important;
  }
  .messenger>.chat-pane{
    grid-column:1 !important;
    grid-row:1 !important;
    direction:rtl !important;
  }
}