:root{--blue:#0070c9;--navy:#13213c;--text:#1f2937;--muted:#64748b;--bg:#f7f9fc;--surface:#fff;--border:#e5e7eb;--input:#d7dee8;--hover:#eef5fc;--bubble:#e8f3ff;--danger:#dc2626;--shadow:0 4px 24px #13213c0d}*{box-sizing:border-box}body{margin:0;font:14px/1.5 Inter,system-ui,-apple-system,'Segoe UI',sans-serif;background:var(--bg);color:var(--text)}body.dark{--navy:#edf3fb;--text:#e3eaf5;--muted:#a5b4c8;--bg:#101923;--surface:#182432;--border:#2c3b4d;--input:#425269;--hover:#233952;--bubble:#164c79;--shadow:none}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}button,a{touch-action:manipulation}button{border:1px solid var(--input);background:var(--surface);color:var(--text);min-height:40px;padding:8px 16px;border-radius:8px}button:hover{background:var(--hover)}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}input,textarea,select{border:1px solid var(--input);background:var(--surface);color:var(--text);padding:10px 12px;min-height:44px;border-radius:8px;width:100%}textarea{resize:vertical}label{display:block;font-size:13px;font-weight:600;color:var(--navy);margin:16px 0 6px}input:focus,textarea:focus,select:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 3px #0070c914}:focus-visible{outline:3px solid var(--blue);outline-offset:3px}h1,h2,h3{color:var(--navy);line-height:1.3}h1{font-size:26px}h2{font-size:22px}h3{font-size:16px}p{margin:8px 0 16px}small,.tiny{font-size:12px;color:var(--muted)}.muted{color:var(--muted)}.primary,.send-button{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:600}.primary:hover,.send-button:hover{background:#005fab}.danger{background:#b91c1c;border-color:#b91c1c;color:white}.full{width:100%;margin-top:24px}.button{display:inline-flex;padding:10px 16px;border-radius:8px;align-items:center;justify-content:center}.brand{font-weight:800;color:var(--blue);font-size:27px}.brand span{color:var(--navy);font-weight:600}.auth-page{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:32px}.auth-layout{display:grid;grid-template-columns:1.2fr 1fr;gap:80px;width:min(1050px,100%);align-items:center}.auth-story h1{font-size:38px;line-height:1.25;letter-spacing:-1px;margin:16px 0}.eyebrow{color:var(--muted);font-size:11px;letter-spacing:1.5px;font-weight:700;margin:40px 0 12px}.auth-story p{color:var(--muted)}.auth-points{display:grid;gap:16px;margin-top:32px;color:var(--navy);font-size:13px}.auth-points span:before{content:'✓';color:var(--blue);margin-right:12px}.auth-card{background:var(--surface);border:1px solid var(--border);padding:32px;border-radius:12px;box-shadow:var(--shadow);width:100%}.auth-card h2{margin:0 0 8px}.auth-links{display:flex;justify-content:space-between;gap:16px;margin:24px 0;font-size:13px}.auth-card>small{display:block;margin-top:24px}.alert{background:var(--hover);padding:12px;border-radius:8px}.alert.error{color:#b91c1c;background:#fff0f0}.error-page{max-width:500px;text-align:center}.chat-app{height:100dvh;display:grid;grid-template-columns:72px 340px minmax(0,1fr);overflow:hidden}.rail{background:var(--bg);border-right:1px solid var(--border);display:flex;align-items:center;flex-direction:column;padding:24px 8px 12px;gap:12px}.mini-brand{background:var(--blue);color:#fff;border-radius:8px;font-weight:800;font-size:13px;width:40px;height:40px;display:grid;place-items:center;margin-bottom:20px}.rail-button,.icon-button{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;padding:8px;border:0;flex-shrink:0;background:transparent;color:var(--muted);border-radius:8px}.rail-button.active{color:var(--blue);background:#0070c918}.rail-button svg,.icon-button svg,svg{width:21px;height:21px;flex-shrink:0}.rail-bottom{margin-top:auto;display:flex;flex-direction:column;gap:12px}.self-avatar,.avatar{border:0;background:var(--hover);color:var(--blue);font-weight:700;border-radius:50%;width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;padding:0}.chat-sidebar{background:var(--surface);border-right:1px solid var(--border);min-width:0;display:flex;flex-direction:column;overflow:hidden}.sidebar-header{height:106px;display:flex;align-items:center;justify-content:space-between;padding:24px 20px 16px;flex-shrink:0}.sidebar-header h1{margin:0 0 2px;font-size:26px}.list-search{display:flex;align-items:center;gap:8px;background:var(--bg);margin:0 20px 16px;padding:0 12px;border:1px solid transparent;border-radius:8px;color:var(--muted)}.list-search input{background:transparent;border:0;padding-left:0;font-size:13px;min-width:0;box-shadow:none}.list-search svg{width:17px}.filters{display:flex;gap:6px;padding:0 20px 16px;flex-shrink:0}.filters button{border:0;font-size:12px;padding:6px 10px;min-height:32px;background:var(--bg);color:var(--muted);border-radius:6px}.filters button.selected{color:var(--blue);background:#0070c914}.conversation-list{flex:1;overflow:auto}.chat-row{width:100%;border:0;border-radius:0;display:flex;align-items:center;gap:12px;padding:18px 20px;text-align:left;background:transparent;min-height:86px;position:relative}.chat-row.selected{background:var(--hover)}.chat-row .row-body{min-width:0;flex:1}.row-top{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:4px}.row-top strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}.row-preview{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:12px}.row-time{font-size:10px;color:var(--muted);white-space:nowrap}.row-bottom{display:flex;gap:8px;align-items:center;justify-content:space-between}.unread{background:var(--blue);color:#fff;border-radius:20px;min-width:19px;height:19px;padding:0 5px;font-size:10px;display:grid;place-items:center}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border);color:var(--muted);font-size:11px}.chat-workspace{min-width:0;min-height:0;background:var(--bg)}.welcome{height:100%;display:flex;align-items:center;justify-content:center;text-align:center;flex-direction:column;padding:32px}.welcome-mark{width:88px;height:88px;border-radius:24px;background:var(--hover);color:var(--blue);display:grid;place-items:center}.welcome-mark svg{width:42px;height:42px}.welcome .eyebrow{margin-top:32px}.welcome h2{font-size:26px;margin:4px 0 16px}.welcome p{color:var(--muted)}.welcome button{margin:8px 0 24px}.conversation{height:100%;display:flex;flex-direction:column;min-width:0;min-height:0}[hidden]{display:none!important}.conversation-header{height:80px;flex-shrink:0;padding:12px 24px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px}.chat-identity{display:flex;align-items:center;gap:12px;padding:0;text-align:left;background:transparent;border:0;min-width:0}.chat-identity>span:last-child{min-width:0}.chat-identity strong{font-size:15px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:36vw}.chat-identity small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:36vw;margin-top:2px}.header-actions{display:flex;gap:8px}.mobile-back{display:none}.messages{flex:1;overflow:auto;padding:20px 28px;min-height:0;overscroll-behavior:contain}.older-button{display:block;margin:0 auto 24px;min-height:32px;font-size:12px;color:var(--blue);border:1px solid var(--border);background:var(--surface)}#message-items{display:flex;flex-direction:column;gap:12px}.message{display:flex;flex-direction:column;align-items:flex-start;max-width:76%;align-self:flex-start}.message.mine{align-self:flex-end;align-items:flex-end}.bubble{border:1px solid var(--border);border-radius:0 12px 12px 12px;background:var(--surface);padding:10px 12px;min-width:110px;max-width:100%;position:relative;box-shadow:0 1px 2px #13213c04}.mine .bubble{background:var(--bubble);border-color:transparent;border-radius:12px 0 12px 12px}.sender-name{font-size:11px;font-weight:700;color:var(--blue);margin-bottom:4px}.message-text{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.65}.message.deleted .message-text{font-style:italic;color:var(--muted)}.message-meta{display:flex;justify-content:flex-end;gap:8px;align-items:center;font-size:10px;color:var(--muted);margin-top:4px}.receipt.read{color:var(--blue)}.message-actions{display:flex;gap:4px;margin-top:3px;opacity:0}.message:hover .message-actions,.message:focus-within .message-actions{opacity:1}.message-actions button{padding:2px 8px;font-size:11px;min-height:28px;border:0;background:transparent;color:var(--muted)}.reply-quote{border-left:3px solid var(--blue);background:#0070c90a;padding:6px 10px;margin-bottom:8px;border-radius:4px;max-width:100%;overflow-wrap:anywhere}.reply-quote strong{display:block;font-size:11px;color:var(--blue)}.reply-quote span{font-size:12px;color:var(--muted)}.forward-label{font-size:10px;font-style:italic;color:var(--muted);margin-bottom:4px}.message-img{max-width:280px;max-height:300px;width:100%;border-radius:8px;display:block;margin:4px 0 8px;object-fit:contain}.message audio,.message video{max-width:100%;width:270px;display:block;margin:8px 0}.file-link{display:block;padding:12px;border:1px solid var(--input);border-radius:8px;margin:4px 0 8px;overflow-wrap:anywhere;color:var(--navy)}.reaction-bar{display:flex;gap:4px;flex-wrap:wrap;margin-top:6px}.reaction-bar button{padding:2px 6px;min-height:26px;border:1px solid var(--border);border-radius:20px;background:var(--surface);font-size:12px}.system-message{align-self:center;color:var(--muted);font-size:11px;background:var(--surface);padding:4px 12px;border-radius:6px;max-width:90%;text-align:center}.compose-zone{background:var(--surface);border-top:1px solid var(--border);padding:16px 24px 8px;flex-shrink:0}.composer{display:flex;align-items:center;gap:8px}.composer textarea{background:var(--bg);border:0;resize:none;min-height:44px;max-height:130px;padding:12px;flex:1;min-width:0;box-shadow:none}.send-button{width:44px;height:44px;display:grid;place-items:center;flex-shrink:0;padding:10px}.compose-hint{display:block;text-align:center;font-size:10px;color:var(--muted);margin-top:8px}.composer-context{background:var(--surface);border-top:1px solid var(--border);padding:10px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px}.context-label{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.recording{color:#b91c1c!important;background:#fff0f0!important}.message-search-bar{padding:12px 24px;background:var(--surface);display:flex;gap:8px;border-bottom:1px solid var(--border)}.message-search-bar input{min-width:0}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:var(--navy);color:var(--surface);padding:12px 20px;border-radius:8px;z-index:80;box-shadow:var(--shadow);max-width:min(500px,90vw);font-size:13px}dialog{border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--text);padding:0;width:min(480px,calc(100vw - 32px));max-height:85dvh;box-shadow:0 20px 80px #0003}dialog::backdrop{background:#13213c55}.dialog-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border);gap:16px;position:sticky;top:0;background:var(--surface);z-index:2}.dialog-header h2{font-size:20px;margin:0}#dialog-body{padding:24px}.dialog-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.dialog-list{display:grid;gap:8px}.dialog-list button{text-align:left;overflow-wrap:anywhere}.dialog-form input[type=checkbox]{width:auto;min-height:0;margin-right:8px}.check-row{display:flex;align-items:center;gap:8px;margin:12px 0;color:var(--text);font-weight:400}.check-row input{width:16px;height:16px;min-height:0}.contact-option{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}.contact-option .grow{flex:1;min-width:0;overflow-wrap:anywhere}.contact-option small{display:block}.empty-list{padding:32px 24px;color:var(--muted);font-size:13px}.status-avatar{border:2px solid var(--blue);padding:3px}.status-content{white-space:pre-wrap;overflow-wrap:anywhere;font-size:22px;line-height:1.5;padding:24px 0;color:var(--navy)}.status-image{max-width:100%;max-height:400px;border-radius:8px;display:block}.emoji-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.emoji-grid button{font-size:23px;padding:6px;border:0}.call-dialog{width:min(760px,calc(100vw - 24px));padding:24px;text-align:center}.call-top h2{margin:8px}.call-videos{height:300px;background:#0d1724;position:relative;border-radius:12px;overflow:hidden;margin:20px 0}.call-videos>video:first-child{width:100%;height:100%;object-fit:contain}.call-videos>video:last-child{position:absolute;bottom:12px;right:12px;width:140px;height:100px;object-fit:cover;border:1px solid #fff4;border-radius:8px;background:#14233a}.call-controls{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.skip{position:absolute;clip-path:inset(50%);width:1px;height:1px;overflow:hidden}.skip:focus{clip-path:none;width:auto;height:auto;z-index:99;background:var(--surface);padding:12px}.settings-section{border-top:1px solid var(--border);margin-top:24px;padding-top:16px}.admin-counts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}.admin-counts div{padding:12px;background:var(--bg);border-radius:8px}.admin-counts strong{display:block;font-size:22px}.upload-label{display:block;font-size:12px;margin:12px 0;color:var(--muted)}
@media(max-width:1100px){.chat-app{grid-template-columns:64px 300px minmax(0,1fr)}.conversation-header{padding:12px 16px}.header-actions{gap:0}.messages{padding:20px}.compose-zone{padding:12px 16px 8px}.message{max-width:88%}.auth-layout{gap:40px}.auth-story h1{font-size:32px}}
@media(max-width:768px){.chat-app{grid-template-columns:60px minmax(0,1fr)}.chat-workspace{display:none}.chat-sidebar{border:0}.chat-app.chat-open{display:block}.chat-app.chat-open .rail,.chat-app.chat-open .chat-sidebar{display:none}.chat-app.chat-open .chat-workspace{display:block;height:100dvh}.mobile-back{display:flex}.conversation-header{gap:4px;padding:8px;height:72px}.chat-identity{gap:8px;flex:1}.chat-identity strong,.chat-identity small{max-width:34vw}.header-actions .icon-button{width:34px;padding:6px}.header-actions #message-search{display:none}.chat-identity .avatar{width:34px;height:34px;font-size:12px}.conversation-header .mobile-back{width:30px}.messages{padding:16px 12px}.message{max-width:86%}.message-actions{opacity:1}.compose-zone{padding:10px 8px 6px}.composer{gap:2px}.composer .icon-button{width:34px;padding:7px}.composer textarea{padding:10px;font-size:14px}.send-button{width:38px;height:40px}.compose-hint{font-size:9px}.composer-context{padding:8px 12px}.message-search-bar{padding:8px;gap:4px}.message-search-bar button{padding:6px 10px;font-size:12px}.auth-page{padding:20px}.auth-layout{grid-template-columns:1fr;gap:24px;max-width:480px}.auth-story .eyebrow,.auth-story h1,.auth-story>p,.auth-points{display:none}.auth-card{padding:24px}.dialog-header{padding:16px 20px}#dialog-body{padding:20px}.call-videos{height:240px}.call-dialog{padding:16px}.call-controls button{font-size:12px;padding:8px 12px}.message-img{max-width:230px}.message audio,.message video{width:230px;max-width:100%}}
.chat-row-copy{min-width:0;flex:1}.chat-row-copy strong,.chat-row-copy small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-row-copy small{margin-top:5px;font-size:12px}.chat-row.active{background:var(--hover)}.bubble p{white-space:pre-wrap;overflow-wrap:anywhere;margin:4px 0 8px}.sender{font-size:11px;color:var(--blue)}.attachment{display:block;max-width:100%;max-height:320px;border-radius:8px;margin:8px 0}.message img.attachment{width:270px;object-fit:contain}.message.system{align-self:center;font-size:11px}.empty{padding:24px;color:var(--muted)}#dialog-body>button{margin:4px}#dialog-body input[type=checkbox]{width:18px;min-height:18px;display:inline-block;margin-left:10px;vertical-align:middle}.status-text{font-size:23px;white-space:pre-wrap;overflow-wrap:anywhere}
.encrypted-message{color:var(--muted);font-style:italic}.compose-hint{min-height:16px}.message .bubble .encrypted-message:before{content:'Secure ';font-weight:700;color:var(--blue);font-style:normal}
/* IST Chat: consistent surfaces and compact conversation navigation. */
.chat-row-meta{display:flex;flex-direction:column;align-items:flex-end;gap:7px;flex-shrink:0}.chat-row-meta small{font-size:10px;white-space:nowrap}.chat-row{min-height:78px;padding:14px 18px}.bubble,.mine .bubble{border-radius:12px;border:1px solid var(--border)}.reply-quote{border:1px solid var(--border);border-radius:8px}.chat-row-copy{overflow:hidden}.chat-row.active{box-shadow:inset 0 0 0 1px var(--border)}#dialog-body>.chat-row{margin:4px 0;width:100%}.composer-context{overflow-wrap:anywhere}.composer-context>span{min-width:0;overflow:hidden;text-overflow:ellipsis}.messages{scrollbar-width:thin}.message-actions{opacity:1}.message-actions button:hover{color:var(--blue);background:var(--hover)}
@media(max-width:400px){.filters{padding-left:12px;padding-right:12px;gap:4px}.filters button{padding:6px 8px}.chat-row{padding:12px;gap:8px}.chat-row .avatar{width:34px;height:34px}.chat-row-meta small{font-size:9px}}
/* v3: IST identity, groups, media and public website */
.sidebar-header{height:132px}.sidebar-logo{width:190px;height:auto;display:block;margin-bottom:10px;background:#fff;border-radius:4px;padding:3px}.sidebar-header h1{font-size:23px}.welcome-logo{width:min(360px,90%);height:auto;background:white;padding:12px;border:1px solid var(--border);border-radius:12px}.auth-logo{width:280px;max-width:100%;height:auto;display:block;background:white;border-radius:8px;padding:8px}.welcome .eyebrow{margin-top:24px}.chat-app{grid-template-columns:72px 350px minmax(0,1fr)}.messages{background:var(--bg)}.bubble{padding:12px 15px}.mine .bubble{background:var(--bubble)}.message{max-width:70%;position:relative}.date-start{margin-top:40px}.date-start:before{content:attr(data-date);display:block;position:absolute;top:-30px;font-size:10px;white-space:nowrap;color:var(--muted);background:var(--surface);padding:3px 9px;border:1px solid var(--border);border-radius:20px}.member-list{max-height:340px;overflow:auto;margin:12px 0}.member-choice{display:flex;align-items:center;gap:10px;border:1px solid var(--border);border-radius:10px;padding:12px;margin:8px 0;flex-wrap:wrap}.member-choice small{flex-basis:100%;padding-left:28px;overflow-wrap:anywhere}.member-choice input{width:18px!important;flex-shrink:0;margin:0!important}.member-card{display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid var(--border)}.member-card>div{flex:1;min-width:0;overflow-wrap:anywhere}.member-card small{display:block}.member-card button{font-size:12px;padding:6px 10px}.details-avatar{width:64px;height:64px;border-radius:20px;background:var(--hover);color:var(--blue);display:grid;place-items:center;font-size:24px;font-weight:700;margin:auto}#dialog-body>h3{text-align:left}.media-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}.media-item{border:1px solid var(--border);border-radius:10px;padding:12px;overflow-wrap:anywhere}.media-item img{width:100%;height:110px;object-fit:cover;border-radius:6px}.media-item strong,.media-item small{display:block}.public-header,.public-footer{max-width:1160px;margin:auto;padding:24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.public-header nav{display:flex;align-items:center;gap:24px}.public-hero{max-width:900px;margin:40px auto 70px;text-align:center;padding:24px}.public-hero h1{font-size:clamp(42px,7vw,76px);letter-spacing:-3px;margin:20px 0}.public-hero>p:not(.eyebrow){font-size:19px;max-width:660px;margin:0 auto 28px;color:var(--muted)}.hero-actions{display:flex;justify-content:center;gap:12px;margin-bottom:20px}.public-section{max-width:1120px;margin:0 auto;padding:36px 24px}.public-section h2{font-size:30px}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature-grid article{border:1px solid var(--border);border-radius:16px;background:var(--surface);padding:24px}.feature-grid span{font-size:10px;color:var(--blue);letter-spacing:1px}.feature-grid p,.security-section p{color:var(--muted)}.security-section{max-width:1072px;background:var(--surface);border:1px solid var(--border);border-radius:16px;margin-top:30px;padding:32px}.public-section details{padding:18px 0;border-bottom:1px solid var(--border)}summary{cursor:pointer;font-weight:600}.public-footer{border-top:1px solid var(--border);font-size:12px;color:var(--muted)}
@media(max-width:1100px){.chat-app{grid-template-columns:64px 310px minmax(0,1fr)}.feature-grid{grid-template-columns:1fr 1fr}.message{max-width:85%}}
@media(max-width:768px){.chat-app{grid-template-columns:56px minmax(0,1fr)}.chat-app.chat-open{display:block}.sidebar-logo{width:175px}.sidebar-header{height:126px}.message{max-width:88%}.public-header{flex-wrap:wrap}.public-header nav{gap:16px}.public-header .auth-logo{width:220px}.public-hero{margin:16px auto}.feature-grid{grid-template-columns:1fr}.security-section{margin:24px}.public-hero h1{letter-spacing:-1.5px}.compose-hint{white-space:normal;font-size:10px}}

/* v4 cPanel UX refinements · visual only */
.public-header{position:sticky;top:0;z-index:25;background:rgba(255,255,255,.98);box-shadow:0 1px 0 #dce5f0;backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:78px;padding:10px clamp(16px,4vw,64px)}
.public-header>a{display:flex;flex:0 1 auto;min-width:0}.public-header .auth-logo{width:clamp(150px,22vw,280px);max-width:100%;height:auto;object-fit:contain}
.public-header nav{display:flex;gap:clamp(8px,1.8vw,22px);align-items:center;flex-wrap:nowrap;white-space:nowrap}
.public-header nav a{display:inline-flex;align-items:center;text-decoration:none;font-weight:650}
.public-hero{padding:clamp(42px,7vw,100px) 24px 80px;min-height:420px;background:linear-gradient(145deg,#f3f9ff 0%,#ffffff 60%,#eef4fc 100%)}
.public-hero h1{font-size:clamp(35px,5vw,70px);line-height:1.08;letter-spacing:-.045em}
.public-hero>p:not(.eyebrow){max-width:720px;margin:20px auto;font-size:clamp(16px,1.7vw,20px);line-height:1.7}
.public-section{scroll-margin-top:95px}.public-section article{box-shadow:0 5px 24px rgba(0,65,110,.035);border:1px solid #e2eaf5;border-radius:16px}
.public-article{max-width:1090px;padding:70px 24px 110px;margin:auto;min-height:60vh}.public-article>h1{font-size:clamp(30px,5vw,52px);letter-spacing:-.035em}.public-article>p{max-width:820px;color:#475569;font-size:16px;line-height:1.8}.public-article h2{font-size:21px}
.public-footer{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;padding:26px clamp(18px,4vw,64px);border-top:1px solid #e1e9f2;background:#fff}.public-footer nav{display:flex;gap:18px;flex-wrap:wrap}.public-footer a{font-weight:600}
.chat-sidebar,.conversation-header,.compose-zone{background:var(--surface)}.chat-row{border-bottom:1px solid var(--border);min-width:0}.chat-row:hover,.chat-row:focus-visible{background:var(--hover)}.chat-row-copy{flex:1;min-width:0;overflow:hidden}.chat-row-copy strong,.chat-row-copy small{display:block;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.chat-row-meta{display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex-shrink:0}.history-event{padding:10px 12px;border-bottom:1px solid var(--border);font-size:12px;overflow-wrap:anywhere}
#connection-label{font-size:12px}.chat-identity{flex:1}.chat-identity strong,.chat-identity small{max-width:min(38vw,480px)}
.message .bubble p{overflow-wrap:anywhere;white-space:pre-wrap}.message-actions{opacity:1}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #4cb4ff;outline-offset:2px}
@media(max-width:1000px){.chat-app{grid-template-columns:60px minmax(240px,310px) minmax(0,1fr)}.rail{padding-inline:4px}.chat-row{padding:14px 12px}.sidebar-header{padding:16px 12px}.list-search{margin-inline:12px}.filters{padding-inline:12px;overflow-x:auto}.messages{padding:15px}.conversation-header{padding:10px 14px}}
@media(max-width:700px){.public-header{min-height:68px;padding:9px 14px;gap:12px}.public-header .auth-logo{width:min(34vw,150px)}.public-header nav{gap:8px;overflow-x:auto;scrollbar-width:thin}.public-header nav a{font-size:12px;flex-shrink:0}.public-header nav a.button{padding:7px 10px}.public-hero{padding:60px 20px 48px}.public-footer{justify-content:center;text-align:center}.chat-app{grid-template-columns:52px minmax(0,1fr)}.rail{width:52px}.chat-sidebar{min-width:0}.chat-workspace{display:none}.chat-app.chat-open .chat-workspace{display:block;position:fixed;inset:0;z-index:10}.chat-app.chat-open .chat-sidebar,.chat-app.chat-open .rail{visibility:hidden}.mobile-back{display:inline-flex}.conversation-header{padding:10px}.chat-identity strong,.chat-identity small{max-width:36vw}.header-actions{gap:0}.messages{padding:12px}.message{max-width:90%}.compose-zone{padding:8px}.auth-layout{gap:18px}.public-article{padding-top:40px}}
@media(max-width:360px){.public-header .auth-logo{width:110px}.public-header nav a:not(.button){font-size:11px}.header-actions .icon-button{width:33px;padding:5px}.chat-identity strong,.chat-identity small{max-width:31vw}}

/* IST Chat v4.4: responsive account management */
.admin-summary {color:var(--muted, #64748b);margin-bottom:12px}
.admin-toolbar {display:flex;gap:12px;align-items:end;flex-wrap:wrap;margin-bottom:18px}
.admin-toolbar label {flex:1 1 200px;min-width:0;display:flex;flex-direction:column;gap:6px}
.admin-toolbar input,.admin-toolbar select {width:100%;max-width:100%;box-sizing:border-box}
.admin-toolbar button {flex:0 0 auto}
.admin-user-list {display:grid;gap:9px;margin:12px 0}
.admin-user-card {display:flex;gap:12px;align-items:center;padding:12px;border:1px solid var(--border);border-radius:12px;min-width:0;background:var(--surface)}
.admin-user-card .avatar {flex-shrink:0}
.admin-user-details {display:flex;flex:1 1 auto;min-width:0;flex-direction:column;gap:3px;overflow-wrap:anywhere}
.admin-user-email {font-size:.91rem;color:var(--text)}
.admin-user-details small {font-size:.78rem}
.admin-pagination {display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:16px 0}
@media(max-width:520px){.admin-user-card {align-items:flex-start;flex-wrap:wrap}.admin-user-card>button{margin-left:auto}.admin-toolbar button{width:100%}}
/* v4.5: clear, responsive IST business chat workspace */
:root {--brand:#0070c9;--brand-strong:#075798;--focus:#0070c9;}
.org-chat-disclosure{position:fixed;bottom:8px;left:50%;transform:translateX(-50%);background:rgba(255,255,255,.97);border:1px solid #c5dcef;box-shadow:0 8px 22px #173d5f22;border-radius:14px;padding:6px 14px;z-index:10;color:#344963;font-size:11px;max-width:min(560px,85vw);text-align:center;pointer-events:auto}
.org-chat-disclosure a{color:#0067bf;text-decoration:underline}
.chat-app{background:#f7f9fc;}
.rail{background:#fff!important;border-right:1px solid #e1e9f2}
.rail-button{transition:background .18s,color .18s,border-color .18s}
.rail-button:hover,.rail-button.active{background:#eaf4ff!important;color:#006ac3!important}
.chat-sidebar{background:#fff;border-right:1px solid #e1e9f2}
.sidebar-header{background:#fff}
.sidebar-logo{max-width:174px;height:auto;object-fit:contain}
.chat-row{border-radius:13px;margin:3px 7px;width:calc(100% - 14px);transition:background .15s;min-height:62px}
.chat-row:hover,.chat-row.active{background:#ecf5fd}
.chat-row .avatar,.chat-identity .avatar,.self-avatar .avatar,.avatar{flex-shrink:0;overflow:hidden;background:#e7f3fc;color:#0872bd}
.avatar img,.self-avatar img{display:block;width:100%;height:100%;object-fit:cover;border-radius:inherit}
.chat-identity{min-width:0}
.chat-identity span:last-child{min-width:0}
.chat-identity small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:290px;display:block}
.chat-row-copy{min-width:0}
.chat-row-copy strong,.chat-row-copy small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.message-meta{font-size:11px}
.message-meta.receipt-read{color:#0070c9;font-weight:700}
.message-meta.receipt-delivered{color:#64748b}
.conversation-header{background:#fff;border-bottom:1px solid #e4edf5}
#dialog{max-width:min(630px,calc(100vw - 24px));width:100%;border-radius:20px;box-shadow:0 20px 70px #0c20394d}
#dialog-body{max-height:70vh;overflow:auto;overscroll-behavior:contain;padding-bottom:8px}
#dialog-body label{display:block;max-width:100%;margin:9px 0}
#dialog-body label input:not([type="checkbox"]),#dialog-body label select{width:100%;max-width:100%;box-sizing:border-box}
#dialog-body .avatar{width:62px;height:62px;display:flex;align-items:center;justify-content:center;font-size:20px}
#dialog-body .chat-row{width:100%;margin:0}
.member-list{max-height:48vh;overflow:auto}
.admin-user-card{gap:12px;align-items:center}
.admin-user-card .avatar{width:48px;height:48px}
.admin-user-card .secondary,.admin-user-card .danger,.admin-user-card .primary{white-space:nowrap}
.review-message{border:1px solid #e1e9f2;padding:12px;margin:10px 0;border-radius:12px;background:#f8fbff;overflow-wrap:anywhere}
.review-message strong{font-size:12px;color:#125785}
.review-message p{margin:8px 0 3px;white-space:pre-wrap}
.managed-note,.managed-disclosure{font-size:.82rem;color:#506176;border-left:3px solid #0070c9;padding:10px 13px;background:#f0f7fe;border-radius:8px;line-height:1.5}
.consent-line{display:flex!important;align-items:flex-start;gap:10px;line-height:1.45;font-size:.83rem}
.consent-line input{margin-top:4px;flex-shrink:0}
.emoji-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;margin:12px 0}
.emoji-choice{font-size:23px!important;min-height:43px;border-radius:11px;border:1px solid transparent!important;background:#f7f9fc!important;padding:4px!important}
.emoji-choice:hover{background:#e5f2ff!important}
.auth-card{max-height:95vh;overflow:auto}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #228de0;outline-offset:2px}
@media (max-width:800px){.org-chat-disclosure{font-size:9px;bottom:2px;padding:4px 10px;max-width:92vw}.sidebar-logo{max-width:135px}.chat-identity small{max-width:145px}#dialog{width:calc(100vw - 16px)}.emoji-grid{grid-template-columns:repeat(6,minmax(0,1fr))}.chat-row{min-height:60px}.admin-user-card{flex-wrap:wrap}}
@media (max-width:380px){.org-chat-disclosure{display:none}.emoji-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.chat-identity small{max-width:100px}}

#admin-button[data-pending]:not([data-pending="0"])::after{content:attr(data-pending);position:absolute;transform:translate(9px,-18px);background:#0d74c9;color:white;border-radius:999px;font-size:10px;padding:1px 4px;min-width:15px;text-align:center}