/* Layout: dark "command rail" sidebar + light work area; Web = rail | topics | thread, Webapp = phone frame + demo controls.
   Direction: engineering-tech — ink navy, signal orange→amber gradient, cyan for people/mentions, dot-grid canvas. */
:root{
  --bg:#F3F5F9; --surface:#FFFFFF; --surface-2:#EEF2F7; --ink:#0E1626; --muted:#5E6B80; --line:#E1E6EE;
  --accent:#F2621B; --accent-2:#FFAA2B; --accent-soft:#FFF0E6; --cyan:#0A9FB3; --cyan-soft:#E3F6F8;
  --ok:#16A36A; --warn:#C27C0E; --link:#0A7FA0;
  --side:#0B1324; --side-2:#13203A; --side-ink:#E4EAF3; --side-muted:#8696B0; --side-line:#1E2C47;
  --grad:linear-gradient(135deg,var(--accent),var(--accent-2));
  --dot:rgba(14,22,38,.07);
  --shadow:0 1px 2px rgba(14,22,38,.06),0 8px 24px rgba(14,22,38,.06);
  --font-display:'Lexend','Be Vietnam Pro',system-ui,sans-serif;
  --font-body:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,Consolas,monospace;
  --r:14px; color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#090E18; --surface:#111A2A; --surface-2:#18233646; --ink:#E6ECF5; --muted:#93A1B8; --line:#213049;
    --accent:#FF7433; --accent-2:#FFB547; --accent-soft:#2D1A10; --cyan:#3CCADB; --cyan-soft:#0F2A31; --link:#5FD3E3;
    --side:#060A13; --side-2:#0F1828; --side-line:#18243A; --dot:rgba(230,236,245,.06);
    --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 28px rgba(0,0,0,.35); color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#090E18; --surface:#111A2A; --surface-2:#182336; --ink:#E6ECF5; --muted:#93A1B8; --line:#213049;
  --accent:#FF7433; --accent-2:#FFB547; --accent-soft:#2D1A10; --cyan:#3CCADB; --cyan-soft:#0F2A31; --link:#5FD3E3;
  --side:#060A13; --side-2:#0F1828; --side-line:#18243A; --dot:rgba(230,236,245,.06);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 28px rgba(0,0,0,.35); color-scheme:dark;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){ --surface-2:#182336; } }
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font:14px/1.55 var(--font-body);display:flex;flex-direction:column;-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
a{color:var(--link)}
.mono{font-family:var(--font-mono);font-size:12px}
.muted{color:var(--muted)}
h1,h2,h3{text-wrap:balance;margin:0;font-family:var(--font-display);font-weight:600;letter-spacing:-.01em}

/* top bar */
.topbar{display:flex;align-items:center;gap:16px;padding:10px 18px;background:var(--side);color:var(--side-ink);border-bottom:1px solid var(--side-line);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:600;font-size:15px}
.logo{width:32px;height:32px;border-radius:10px;background:var(--grad);color:#fff;display:grid;place-items:center;font-size:12.5px;font-weight:700;font-family:var(--font-display);box-shadow:0 4px 14px color-mix(in srgb,var(--accent) 45%,transparent);flex:none}
.brand small{display:block;font-weight:400;color:var(--side-muted);font-size:11.5px;font-family:var(--font-body)}
.seg{display:inline-flex;background:var(--side-2);border:1px solid var(--side-line);border-radius:12px;padding:3px}
.seg button{border:0;background:transparent;padding:6px 14px;border-radius:9px;font-weight:500;color:var(--side-muted);font-size:13px}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 2px 8px rgba(0,0,0,.25)}
.topbar .hint{color:var(--side-muted)}
.topbar .btn{background:transparent;border-color:var(--side-line);color:var(--side-ink)}
.topbar .btn:hover{background:var(--side-2)}
.spacer{flex:1}
.btn{border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:7px 13px;font-weight:500;display:inline-flex;align-items:center;gap:6px;transition:background .15s,transform .15s,box-shadow .15s}
.btn:hover{background:var(--surface-2)}
.btn.primary{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 4px 14px color-mix(in srgb,var(--accent) 35%,transparent)}
.btn.primary:hover{transform:translateY(-1px);box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 45%,transparent)}
.btn.sm{padding:5px 10px;font-size:12.5px;border-radius:9px}
.icon-btn{border:0;background:transparent;border-radius:10px;padding:7px;display:inline-grid;place-items:center;color:var(--muted);position:relative;transition:background .15s,color .15s}
.icon-btn:hover{background:var(--surface-2);color:var(--ink)}
.icon{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.badge{position:absolute;top:1px;right:1px;min-width:17px;height:17px;padding:0 4px;border-radius:999px;background:var(--grad);color:#fff;font-size:10.5px;font-weight:700;display:grid;place-items:center;box-shadow:0 0 0 2px var(--side)}
.pill{display:inline-flex;align-items:center;padding:1px 8px;border-radius:999px;font-size:11px;font-weight:600;background:var(--surface-2);color:var(--muted);line-height:18px}
.pill.owner{background:var(--accent-soft);color:var(--accent)}
.pill.admin{background:var(--cyan-soft);color:var(--cyan)}
.avatar{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-weight:600;font-size:13px;color:#fff;flex:none;font-family:var(--font-display);position:relative}
.avatar.lg{width:52px;height:52px;font-size:17px;border-radius:16px}
.avatar.sm{width:28px;height:28px;font-size:11px;border-radius:9px}
.avatar.on::after{content:"";position:absolute;right:-2px;bottom:-2px;width:10px;height:10px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 2px var(--surface)}

#app{flex:1;min-height:0;display:flex}

/* ===== WEB ===== */
.web-wrap{flex:1;min-height:0;overflow:auto}
.web{display:grid;grid-template-columns:264px 300px minmax(480px,1fr);height:100%;min-height:600px;min-width:1044px}
.side{background:linear-gradient(180deg,var(--side),var(--side-2));color:var(--side-ink);display:flex;flex-direction:column;min-height:0;position:relative}
.me{display:flex;gap:10px;align-items:center;padding:16px 14px;border-bottom:1px solid var(--side-line)}
.me .avatar.on::after{box-shadow:0 0 0 2px var(--side)}
.me .who{flex:1;min-width:0}
.me .who b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600}
.me .who span{color:var(--side-muted)!important}
.side .icon-btn{color:var(--side-muted)}
.side .icon-btn:hover{background:var(--side-2);color:#fff}
.side-h{display:flex;justify-content:space-between;align-items:center;padding:14px 14px 6px;font-size:11px;font-weight:600;color:var(--side-muted);text-transform:uppercase;letter-spacing:.08em}
.glist{overflow:auto;flex:1;padding:0 8px}
.gitem{display:flex;gap:10px;align-items:center;width:100%;text-align:left;border:0;background:transparent;border-radius:12px;padding:8px;color:var(--side-ink);position:relative;transition:background .15s}
.gitem:hover{background:rgba(255,255,255,.05)}
.gitem.on{background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 22%,transparent),color-mix(in srgb,var(--accent) 4%,transparent))}
.gitem.on::before{content:"";position:absolute;left:-8px;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0;background:var(--grad)}
.gmark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;font-weight:600;font-size:12px;flex:none;color:#fff;font-family:var(--font-display);background:var(--g, #33415c)}
.gitem .t{flex:1;min-width:0}
.gitem .t b{display:block;font-weight:500;font-size:13px;line-height:1.3}
.gitem .t span{font-size:11.5px;color:var(--side-muted)}
.count{min-width:20px;height:20px;border-radius:999px;background:var(--grad);color:#fff;font-size:11px;font-weight:700;display:grid;place-items:center;padding:0 6px}
.side-foot{border-top:1px solid var(--side-line);padding:8px}
.navitem{display:flex;gap:10px;align-items:center;width:100%;border:0;background:transparent;border-radius:10px;padding:9px 10px;text-align:left;font-weight:500;color:var(--side-ink)}
.navitem:hover,.navitem.on{background:rgba(255,255,255,.07)}
.sys{margin:8px;padding:10px 12px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid var(--side-line);font-size:11.5px;color:var(--side-muted);display:flex;align-items:center;gap:8px}
.live{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(22,163,106,.6);animation:pulse 2s infinite;flex:none}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(22,163,106,.55)}70%{box-shadow:0 0 0 7px rgba(22,163,106,0)}100%{box-shadow:0 0 0 0 rgba(22,163,106,0)}}

.topics{border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0;background:var(--surface)}
.pane-h{padding:16px 18px;border-bottom:1px solid var(--line);background:var(--surface)}
.pane-h h2{font-size:16px;line-height:1.3}
.pane-h p{margin:4px 0 0;font-size:12.5px;color:var(--muted)}
.pane-h .row{display:flex;gap:6px;margin-top:12px;flex-wrap:wrap;align-items:center}
.avstack{display:flex}
.avstack .avatar{border:2px solid var(--surface);margin-left:-8px}
.avstack .avatar:first-child{margin-left:0}
.tlist{overflow:auto;flex:1;padding:10px;display:flex;flex-direction:column;gap:6px}
.titem{display:block;width:100%;text-align:left;border:1px solid transparent;background:transparent;border-radius:12px;padding:11px 12px;transition:background .15s,border-color .15s}
.titem:hover{background:var(--surface-2)}
.titem.on{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 35%,transparent)}
.titem b{display:block;font-weight:500;font-size:13.5px;line-height:1.4}
.titem .meta{display:flex;gap:10px;font-size:11.5px;color:var(--muted);margin-top:5px;flex-wrap:wrap;align-items:center}
.tag{display:inline-flex;align-items:center;gap:3px;font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--accent)}
.tag.lock{color:var(--muted)}

.thread{display:flex;flex-direction:column;min-height:0;background-color:var(--bg);background-image:radial-gradient(var(--dot) 1px,transparent 1px);background-size:18px 18px}
.thread .pane-h{display:flex;justify-content:space-between;gap:12px;align-items:center;background:color-mix(in srgb,var(--surface) 85%,transparent);backdrop-filter:blur(10px)}
.crumbs{font-size:11.5px;color:var(--muted);display:flex;gap:6px;align-items:center}
.posts{flex:1;overflow:auto;padding:18px 22px 10px;display:flex;flex-direction:column;gap:4px}
.daysep{display:flex;align-items:center;gap:12px;margin:10px 0 6px;font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;flex:none}
.daysep::before,.daysep::after{content:"";flex:1;height:1px;background:var(--line)}
.mgroup{display:grid;grid-template-columns:44px 1fr;gap:12px;padding:12px 14px 8px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);flex:none;margin-bottom:8px}
.mgroup.mine{border-color:color-mix(in srgb,var(--accent) 30%,var(--line));background:linear-gradient(180deg,color-mix(in srgb,var(--accent-soft) 55%,var(--surface)),var(--surface) 60%)}
.mg-av{padding-top:2px}
.mg-main{min-width:0}
.mg-head{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;margin-bottom:2px}
.mg-head b{font-family:var(--font-display);font-weight:600;font-size:14px}
.mg-head .nick{font-size:12px;color:var(--cyan)}
.mg-head .title{font-size:12px;color:var(--muted)}
.mg-head time{font-size:11.5px;color:var(--muted);margin-left:auto;font-variant-numeric:tabular-nums}
.msg{position:relative;padding:6px 64px 6px 10px;margin:0 -10px;border-radius:10px;scroll-margin:20px;transition:background .15s}
.msg:hover{background:var(--surface-2)}
.msg.flash{animation:flash 1.8s ease-out}
@keyframes flash{0%{background:color-mix(in srgb,var(--accent) 22%,transparent)}100%{background:transparent}}
.msg-no{position:absolute;right:10px;top:7px;font-family:var(--font-mono);font-size:11px;color:var(--accent);opacity:.8}
.msg-time{position:absolute;left:-46px;top:9px;width:40px;text-align:right;font-size:10.5px;color:var(--muted);opacity:0;font-variant-numeric:tabular-nums}
.msg:hover .msg-time{opacity:1}
.msg.first .msg-time{display:none}
.msg-tools{position:absolute;right:46px;top:-14px;display:none;gap:2px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:2px;box-shadow:var(--shadow);z-index:2}
.msg:hover .msg-tools,.msg:focus-within .msg-tools{display:flex}
.msg-tools button{border:0;background:transparent;font-size:12px;padding:3px 8px;border-radius:7px;color:var(--muted);white-space:nowrap}
.msg-tools button:hover{background:var(--surface-2);color:var(--ink)}
.ptext{word-wrap:break-word}
.mention{background:var(--cyan-soft);color:var(--cyan);border-radius:6px;padding:0 4px;text-decoration:none;font-weight:600;border:0;font-size:inherit;cursor:pointer}
.mention:hover{filter:brightness(.95)}
.quote{border-left:3px solid transparent;border-image:var(--grad) 1;background:var(--surface-2);padding:6px 10px;margin:2px 0 6px;font-size:12.5px;color:var(--muted)}
.quote .q-h{font-size:11.5px;margin-bottom:1px}
.quote .q-h b{color:var(--ink);font-weight:600}
.pno{font-family:var(--font-mono);color:var(--accent);font-weight:500}
.imgs{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.imgs figure{margin:0;width:168px;position:relative}
.imgs img{width:168px;height:118px;object-fit:cover;border-radius:12px;display:block;background:var(--surface-2);box-shadow:var(--shadow)}
.imgs figcaption{position:absolute;left:6px;bottom:6px;font-size:10.5px;color:#fff;background:rgba(6,10,19,.62);backdrop-filter:blur(4px);padding:1px 7px;border-radius:999px}
.files{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.file{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:12px;padding:8px 12px;background:var(--surface);font-size:12.5px}
.file .fi{display:flex;flex-direction:column;line-height:1.3}
.ext{font-family:var(--font-mono);font-size:10px;font-weight:500;padding:6px 5px;border-radius:8px;background:var(--grad);color:#fff;min-width:38px;text-align:center}
.ext.pdf{background:linear-gradient(135deg,#E5484D,#F97066)}
.ext.docx,.ext.doc{background:linear-gradient(135deg,#2563EB,#4F8BFF)}
.ext.xlsx,.ext.xls{background:linear-gradient(135deg,#15803D,#22C55E)}
.ext.img{background:linear-gradient(135deg,var(--cyan),#5EE0EE)}
.pactions{display:none}

.composer{padding:10px 22px 16px;position:relative;background:transparent}
.cbox{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:8px 10px 8px;transition:border-color .15s,box-shadow .15s}
.cbox:focus-within{border-color:color-mix(in srgb,var(--accent) 55%,var(--line));box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent),var(--shadow)}
.composer .quoting,.mcomposer .quoting{display:flex;justify-content:space-between;align-items:center;font-size:12px;background:var(--accent-soft);color:var(--ink);border-radius:9px;padding:3px 4px 3px 10px;margin-bottom:6px}
.composer textarea{width:100%;min-height:48px;max-height:180px;resize:none;border:0;outline:0;padding:4px 4px;background:transparent}
.ctools{display:flex;align-items:center;gap:2px;margin-top:2px;flex-wrap:nowrap;min-width:0}
.chint{flex:1;min-width:0;margin-left:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sendbtn{flex:none}
.ctools label.icon-btn{cursor:pointer}
.ctools input[type=file]{display:none}
.pending{display:flex;flex-wrap:wrap;gap:6px}
.pending:not(:empty){margin:4px 0 6px}
.pend{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:12px;padding:4px 6px 4px 4px;font-size:11.5px;background:var(--surface-2);line-height:1.35}
.pend img{width:36px;height:36px;object-fit:cover;border-radius:8px}
.pend .ok{color:var(--ok);font-weight:600}
.pend .ext{padding:4px 3px;min-width:34px}
.pend button{border:0;background:transparent;color:var(--muted);padding:0 2px}
.suggest{position:absolute;bottom:calc(100% - 6px);left:22px;width:300px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 16px 40px rgba(14,22,38,.2);padding:6px;z-index:5}
.suggest .sh{font-size:10.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:2px 6px 4px;font-weight:600}
.suggest button{display:flex;gap:10px;align-items:center;width:100%;border:0;background:transparent;text-align:left;padding:6px;border-radius:9px}
.suggest button.on,.suggest button:hover{background:var(--cyan-soft)}
.suggest small{display:block;color:var(--muted);font-size:11.5px}
.hint{font-size:11.5px;color:var(--muted)}
.kbd{font-family:var(--font-mono);font-size:10.5px;border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:0 4px;color:var(--muted)}
.sendbtn{border:0;border-radius:11px;padding:7px 14px;background:var(--grad);color:#fff;font-weight:600;display:inline-flex;align-items:center;gap:6px;box-shadow:0 4px 14px color-mix(in srgb,var(--accent) 35%,transparent)}
.sendbtn:hover{filter:brightness(1.05)}

/* popover / dialogs */
.pop{position:absolute;z-index:20;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:16px;box-shadow:0 20px 50px rgba(6,10,19,.3);width:360px;max-height:440px;overflow:auto}
.pop h3{font-size:14px;padding:12px 14px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:var(--surface)}
.nitem{display:flex;gap:10px;width:100%;text-align:left;border:0;border-bottom:1px solid var(--line);background:transparent;padding:11px 14px;position:relative}
.nitem:hover{background:var(--surface-2)}
.nitem.unread::after{content:"";position:absolute;right:14px;top:16px;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.nitem .txt{font-size:13px;line-height:1.45}
.nitem .when{font-size:11.5px;color:var(--muted)}
.overlay{position:fixed;inset:0;background:rgba(6,10,19,.55);backdrop-filter:blur(4px);display:grid;place-items:center;z-index:50;padding:16px}
.dialog{background:var(--surface);border-radius:20px;width:min(480px,100%);max-height:90%;overflow:auto;box-shadow:0 30px 70px rgba(0,0,0,.35);border:1px solid var(--line)}
.dialog header{padding:18px 20px 14px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.dialog header h3{font-size:16px}
.dialog .bd{padding:16px 20px;display:flex;flex-direction:column;gap:14px}
.dialog footer{padding:12px 20px 16px;display:flex;justify-content:flex-end;gap:8px}
.field label{display:block;font-size:12px;font-weight:600;margin-bottom:5px;color:var(--muted)}
.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);border-radius:11px;padding:9px 12px;background:var(--bg);outline:0}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent)}
.checks{display:flex;flex-direction:column;gap:2px;max-height:210px;overflow:auto;border:1px solid var(--line);border-radius:12px;padding:6px}
.checks label{display:flex;align-items:center;gap:10px;font-weight:400;font-size:13px;padding:5px 6px;border-radius:8px;color:var(--ink);margin:0}
.checks label:hover{background:var(--surface-2)}
.checks input{accent-color:var(--accent)}
.mrow{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.mrow .t{flex:1}
.err{color:#E5484D;font-size:12.5px}
.err:empty{display:none}

/* login */
.login{width:min(420px,100%);background:var(--surface);border-radius:24px;padding:30px;box-shadow:0 30px 70px rgba(0,0,0,.4);border:1px solid var(--line);position:relative;overflow:hidden}
.login::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--grad)}
.login h2{font-size:22px;margin:16px 0 4px}
.login form{display:flex;flex-direction:column;gap:12px;margin-top:18px}
.login .btn.primary{justify-content:center;padding:10px}
.demo-acc{display:flex;flex-wrap:wrap;gap:6px}
.demo-acc button{border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:3px 11px;font-size:12px;font-family:var(--font-mono)}
.demo-acc button:hover{border-color:var(--accent);color:var(--accent)}

/* stats */
.stats{grid-column:2 / 4;overflow:auto;padding:24px 28px;background-color:var(--bg);background-image:radial-gradient(var(--dot) 1px,transparent 1px);background-size:18px 18px}
.stats h2{font-size:22px}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:18px 0}
.tile{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.tile::after{content:"";position:absolute;right:-30px;top:-30px;width:90px;height:90px;border-radius:50%;background:var(--grad);opacity:.08}
.tile .k{font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.tile .v{font-size:28px;font-weight:600;font-variant-numeric:tabular-nums;line-height:1.2;margin-top:4px;font-family:var(--font-display);background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.tile .s{font-size:12px;color:var(--muted)}
.quota{height:6px;border-radius:999px;background:var(--surface-2);overflow:hidden;margin-top:10px}
.quota i{display:block;height:100%;background:var(--grad);border-radius:999px;min-width:6px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 18px;margin-bottom:12px;box-shadow:var(--shadow)}
.card h3{font-size:14.5px;margin-bottom:10px}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line)}
th{font-size:11px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.06em}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
td .ext{padding:3px 4px;min-width:34px;margin-right:6px;display:inline-block}
.bar{display:flex;align-items:center;gap:8px}
.bar i{display:block;height:8px;border-radius:4px;background:var(--grad)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.tbl-wrap{overflow-x:auto}

/* toast (web push) */
.toast{position:fixed;right:20px;bottom:20px;width:360px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 20px 50px rgba(6,10,19,.3);padding:14px;display:flex;gap:12px;z-index:60;cursor:pointer;text-align:left;animation:rise .3s ease-out}
@keyframes rise{from{transform:translateY(20px);opacity:0}to{transform:none;opacity:1}}
.toast .app{font-size:11px;color:var(--muted)}

/* ===== MOBILE ===== */
.mob-wrap{flex:1;overflow:auto;display:flex;justify-content:center;gap:36px;padding:28px 16px;flex-wrap:wrap;align-items:flex-start;background:radial-gradient(800px 400px at 30% 0%,color-mix(in srgb,var(--accent) 10%,transparent),transparent),var(--bg)}
.phone{width:390px;max-width:100%;height:800px;border-radius:48px;background:#05080F;padding:11px;box-shadow:0 0 0 2px #1E2A40,0 30px 70px rgba(6,10,19,.45);flex:none;position:relative}
.screen{width:100%;height:100%;border-radius:38px;overflow:hidden;background:var(--bg);display:flex;flex-direction:column;position:relative}
.sbar{height:44px;display:flex;justify-content:space-between;align-items:center;padding:4px 28px 0;font-size:13px;font-weight:600;background:var(--side);color:#fff;position:relative}
.sbar::after{content:"";position:absolute;left:50%;top:10px;width:96px;height:26px;border-radius:20px;background:#000;transform:translateX(-50%)}
.mhead{background:var(--side);color:var(--side-ink);padding:6px 12px 12px;display:flex;align-items:center;gap:8px}
.mhead h2{font-size:18px;flex:1;line-height:1.25}
.mhead .sub{font-size:11.5px;color:var(--side-muted);font-weight:400;display:block;font-family:var(--font-body)}
.mhead .icon-btn{color:var(--side-muted)}
.mhead .btn{background:transparent;border-color:var(--side-line);color:var(--side-ink)}
.mbody{flex:1;overflow:auto;padding:12px}
.mbody.dots{background-image:radial-gradient(var(--dot) 1px,transparent 1px);background-size:16px 16px}
.mnav{display:grid;grid-template-columns:repeat(4,1fr);background:color-mix(in srgb,var(--surface) 90%,transparent);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:6px 4px 20px}
.mnav button{border:0;background:transparent;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:10.5px;color:var(--muted);position:relative;padding:4px}
.mnav button.on{color:var(--accent);font-weight:600}
.mnav button.on::before{content:"";position:absolute;top:-7px;width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--grad)}
.mnav .badge{right:calc(50% - 22px);box-shadow:0 0 0 2px var(--surface)}
.mcard{display:flex;gap:12px;align-items:center;width:100%;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:11px;margin-bottom:8px;box-shadow:var(--shadow)}
.mcard .t{flex:1;min-width:0}
.mcard b{display:block;font-size:14px;line-height:1.3;font-weight:600}
.mcard span{font-size:12px;color:var(--muted)}
.mcard .gmark{width:42px;height:42px;border-radius:13px}
.msearch{width:100%;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--surface);margin-bottom:10px;outline:0}
.msearch:focus{border-color:var(--accent)}
.mbody .tiles{grid-template-columns:1fr 1fr;gap:8px}
.mbody .tile{padding:12px}
.mbody .tile .v{font-size:21px}
.mbody .mgroup{grid-template-columns:32px 1fr;gap:10px;padding:10px 12px 6px;margin-bottom:8px}
.mbody .mg-head b{font-size:13.5px}
.mbody .mg-head .title{display:none}
.mbody .msg{padding:5px 40px 5px 8px;margin:0 -8px}
.mbody .msg-no{right:8px}
.mbody .msg-time{display:none}
.mbody .msg-tools{right:6px;top:-16px}
.mbody .imgs figure,.mbody .imgs img{width:116px}
.mbody .imgs img{height:88px}
.mcomposer{background:var(--surface);border-top:1px solid var(--line);padding:8px 10px;position:relative}
.mcomposer .row{display:flex;gap:4px;align-items:flex-end}
.mcomposer textarea{flex:1;min-height:40px;max-height:110px;resize:none;border:1px solid var(--line);border-radius:20px;padding:9px 14px;background:var(--bg);outline:0}
.mcomposer textarea:focus{border-color:var(--accent)}
.send{width:40px;height:40px;border-radius:50%;border:0;background:var(--grad);color:#fff;display:grid;place-items:center;flex:none;box-shadow:0 4px 12px color-mix(in srgb,var(--accent) 40%,transparent)}
.mcomposer .suggest{left:10px;width:calc(100% - 20px)}
.fab{position:absolute;right:16px;bottom:90px;width:56px;height:56px;border-radius:18px;border:0;background:var(--grad);color:#fff;display:grid;place-items:center;box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 45%,transparent)}
.pushbar{position:absolute;top:48px;left:10px;right:10px;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(16px);border-radius:20px;padding:11px 12px;box-shadow:0 14px 34px rgba(0,0,0,.3);display:flex;gap:10px;z-index:30;text-align:left;border:1px solid var(--line);animation:drop .35s ease-out}
@keyframes drop{from{transform:translateY(-130%)}to{transform:none}}
.sheet{position:absolute;left:0;right:0;bottom:0;background:var(--surface);border-radius:24px 24px 0 0;padding:20px;box-shadow:0 -10px 30px rgba(0,0,0,.25);z-index:35}
.sheet ol{padding-left:20px;margin:10px 0 14px;line-height:1.8}
.sheet-bg{position:absolute;inset:0;background:rgba(0,0,0,.4);z-index:34}
.switch{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.switch input{appearance:none;width:44px;height:26px;border-radius:999px;background:var(--line);position:relative;flex:none;cursor:pointer;transition:background .2s}
.switch input::after{content:"";position:absolute;left:3px;top:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:transform .2s}
.switch input:checked{background:var(--grad)}
.switch input:checked::after{transform:translateX(18px)}
.controls{width:350px;max-width:100%;display:flex;flex-direction:column;gap:12px}
.controls .card p{margin:0 0 8px;font-size:13px;color:var(--muted)}
.controls .card .btn{width:100%;justify-content:center;margin-top:6px}
.controls .step{display:flex;gap:10px;font-size:13px;color:var(--muted);margin-bottom:6px}
.controls .step b{width:20px;height:20px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:11px;flex:none}
.empty{color:var(--muted);text-align:center;padding:30px 10px;font-size:13px}


/* Zalo-style bubbles */
:root{--mine:#DCEBFF;--mine-ink:#0E1626;--chatbg:#E9EDF2}
:root[data-theme="dark"]{--mine:#173A63;--mine-ink:#E6ECF5;--chatbg:#0C121D}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--mine:#173A63;--mine-ink:#E6ECF5;--chatbg:#0C121D}}
.thread,.mbody.dots{background-color:var(--chatbg)}
.posts{gap:0;padding:14px 22px 10px}
.tsep{display:flex;justify-content:center;margin:14px 0 10px;flex:none}
.tsep span{background:color-mix(in srgb,var(--muted) 28%,transparent);color:var(--surface);font-size:11.5px;font-weight:500;padding:2px 12px;border-radius:999px}
:root[data-theme="dark"] .tsep span{color:var(--ink)}
.cl{display:flex;gap:8px;align-items:flex-start;margin:0 0 10px;flex:none}
.cl-av{width:30px;flex:none}
.cl-stack{display:flex;flex-direction:column;align-items:flex-start;gap:4px;max-width:min(70%,560px);min-width:0}
.cl.mine{flex-direction:row-reverse}
.cl.mine .cl-av{display:none}
.cl.mine .cl-stack{align-items:flex-end}
.cl-name{font-size:12px;color:var(--muted);font-weight:500;margin:0 0 1px 2px;display:flex;gap:6px;align-items:center}
.bub{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:7px 11px;box-shadow:0 1px 1px rgba(14,22,38,.05);max-width:100%;scroll-margin:24px;outline:0}
.cl.mine .bub{background:var(--mine);color:var(--mine-ink);border-color:color-mix(in srgb,var(--mine) 70%,var(--cyan))}
.bub time{display:block;font-size:10.5px;color:var(--muted);margin-top:3px;font-variant-numeric:tabular-nums}
.bub .quote{background:color-mix(in srgb,var(--surface-2) 80%,transparent);border-image:none;border-left:3px solid #2F7CF6;border-radius:4px;color:var(--muted);margin:2px 0 5px}
.cl.mine .bub .quote{background:color-mix(in srgb,#fff 45%,transparent)}
:root[data-theme="dark"] .cl.mine .bub .quote{background:rgba(0,0,0,.2)}
.bub .imgs{margin-top:4px}
.bub .imgs:first-child{margin-top:0}
.bub.flash{animation:bflash 1.8s ease-out}
@keyframes bflash{0%{box-shadow:0 0 0 3px var(--accent)}100%{box-shadow:0 0 0 0 transparent}}
.bub .msg-tools{position:absolute;top:50%;transform:translateY(-50%);left:calc(100% + 6px);right:auto;display:none;align-items:center;gap:2px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:2px 4px;box-shadow:var(--shadow);z-index:2;white-space:nowrap}
.cl.mine .bub .msg-tools{left:auto;right:calc(100% + 6px)}
.bub:hover .msg-tools,.bub:focus .msg-tools,.bub:focus-within .msg-tools{display:flex}
.bub .msg-tools .pno{font-size:11px;padding:0 4px}
.mbody .cl-stack{max-width:80%}
.mbody .imgs figcaption{white-space:nowrap;font-size:10px;padding:1px 6px}
.mbody .cl-av{width:28px}
.mbody .bub .msg-tools{top:auto;bottom:calc(100% + 2px);transform:none;left:0}
.mbody .cl.mine .bub .msg-tools{left:auto;right:0}

/* user-picked accent + group colour */
.swatches{display:flex;flex-wrap:wrap;gap:8px}
.sw{width:34px;height:34px;border-radius:11px;border:2px solid transparent;cursor:pointer;position:relative;box-shadow:inset 0 0 0 1px rgba(0,0,0,.08)}
.sw.on{border-color:var(--ink)}
.sw.on::after{content:"";position:absolute;inset:9px 8px 11px 9px;border:solid #fff;border-width:0 0 2.5px 2.5px;transform:rotate(-45deg)}
.sw-custom{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.sw-custom input[type=color]{width:42px;height:34px;border:1px solid var(--line);border-radius:10px;padding:2px;background:var(--surface);cursor:pointer}
.modes{display:inline-flex;background:var(--surface-2);border-radius:11px;padding:3px}
.modes button{border:0;background:transparent;padding:6px 14px;border-radius:8px;font-size:13px;color:var(--muted);font-weight:500}
.modes button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.sec-t{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px;display:flex;justify-content:space-between;align-items:center}
.lockline{display:flex;gap:6px;align-items:center;font-size:12.5px;color:var(--muted);background:var(--surface-2);border-radius:10px;padding:8px 10px}
.rolesel{border:1px solid var(--line);border-radius:8px;padding:3px 6px;background:var(--bg);font-size:12px}
.perm{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:10px;line-height:1.6}
.thread .pane-h{border-top:3px solid var(--gc,transparent)}
.cl.mine .bub{background:color-mix(in srgb,var(--gc,#2F7CF6) 15%,var(--surface));border-color:color-mix(in srgb,var(--gc,#2F7CF6) 35%,var(--line));color:var(--ink)}
.mhead.gtint{box-shadow:inset 0 -3px 0 var(--gc)}
.add-row{display:flex;gap:8px}
.add-row select{flex:1}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}

/* ===================== APP (bản chạy thật) ===================== */
html,body{height:100%}
body.app{overflow:hidden}
#app{flex:1;min-height:0;display:flex}
.web{min-width:0}
@media (max-width: 1100px){ .web{grid-template-columns:230px 270px minmax(0,1fr)} }
.side .search-btn{margin:8px 8px 0;display:flex;gap:8px;align-items:center;border:1px solid var(--side-line);background:rgba(255,255,255,.04);color:var(--side-muted);border-radius:10px;padding:8px 10px;text-align:left;width:calc(100% - 16px)}
.side .search-btn:hover{color:#fff}
.newmsg{position:absolute;left:50%;transform:translateX(-50%);bottom:120px;background:var(--grad);color:#fff;border:0;border-radius:999px;padding:6px 14px;font-weight:600;box-shadow:var(--shadow);z-index:3}
.thread{position:relative}
.loadmore{align-self:center;margin:6px 0 10px;flex:none}
.bub.deleted{font-style:italic;color:var(--muted);background:transparent!important;border-style:dashed!important}
.bub .edited{font-size:10.5px;color:var(--muted);margin-left:6px}
.bub .imgs a{display:block}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;color:var(--muted);padding:40px 20px;height:100%}
.empty-state h3{color:var(--ink)}
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--accent);animation:spin .8s linear infinite;margin:20px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.toasts{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:8px;z-index:70;pointer-events:none;width:min(520px,92%)}
.toast-msg{background:var(--side);color:#fff;padding:9px 16px;border-radius:12px;box-shadow:var(--shadow);font-size:13px;max-width:100%;animation:rise .25s ease-out;pointer-events:auto}
.toast-msg.err{background:#B42318}
.searchpane{grid-column:2 / 4;display:flex;flex-direction:column;min-height:0;background:var(--bg)}
.searchpane .bar-in{padding:16px 22px;border-bottom:1px solid var(--line);background:var(--surface)}
.searchpane .res{flex:1;overflow:auto;padding:12px 22px}
.sres{display:block;width:100%;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:8px}
.sres:hover{border-color:var(--accent)}
.sres small{display:block;color:var(--muted);font-size:11.5px}
.people-res{max-height:220px;overflow:auto;border:1px solid var(--line);border-radius:12px;margin-top:6px}
.people-res button{display:flex;gap:10px;align-items:center;width:100%;text-align:left;border:0;border-bottom:1px solid var(--line);background:transparent;padding:7px 10px}
.people-res button:hover{background:var(--surface-2)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.chip{display:inline-flex;align-items:center;gap:4px;background:var(--surface-2);border-radius:999px;padding:2px 4px 2px 10px;font-size:12px}
.chip button{border:0;background:transparent;color:var(--muted);padding:0 4px}
.pill.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}
.pill.bad{background:color-mix(in srgb,#E5484D 14%,transparent);color:#E5484D}
.pill.guest{background:color-mix(in srgb,#8B5CF6 14%,transparent);color:#8B5CF6}

/* Mobile app (màn hình nhỏ: chạy toàn màn hình, không có khung điện thoại) */
.mapp{flex:1;display:flex;flex-direction:column;min-height:0;background:var(--bg);position:relative;width:100%}
.mapp .mhead{padding:calc(env(safe-area-inset-top) + 10px) 12px 12px}
.mapp .mnav{padding-bottom:calc(env(safe-area-inset-bottom) + 8px)}
.mapp .mcomposer{padding-bottom:calc(env(safe-area-inset-bottom) + 8px)}
.mapp .fab{bottom:calc(env(safe-area-inset-bottom) + 84px)}
.mapp .pushbar{top:calc(env(safe-area-inset-top) + 8px)}
.mapp .bub .msg-tools{display:none!important}
.mapp .bub.sel .msg-tools{display:flex!important}
.install-hint{background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 30%,var(--line));border-radius:14px;padding:12px;font-size:13px;margin-bottom:10px}

/* Trang đăng nhập / cài đặt / quản trị */
body.page{display:block;overflow:auto;background:radial-gradient(900px 500px at 20% -10%,color-mix(in srgb,var(--accent) 16%,transparent),transparent),var(--side);min-height:100%;color:var(--ink)}
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px 16px}
.auth-card{width:min(420px,100%);background:var(--surface);border-radius:24px;padding:28px;box-shadow:0 30px 70px rgba(0,0,0,.4);position:relative;overflow:hidden}
.auth-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--grad)}
.auth-card h1{font-size:22px;margin:16px 0 4px}
.auth-tabs{display:flex;background:var(--surface-2);border-radius:12px;padding:3px;margin:18px 0 14px}
.auth-tabs button{flex:1;border:0;background:transparent;padding:8px 6px;border-radius:9px;font-size:13px;font-weight:500;color:var(--muted)}
.auth-tabs button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.auth-card form{display:flex;flex-direction:column;gap:12px}
.auth-card .btn.primary{justify-content:center;padding:11px;font-size:15px}
.otp-input{letter-spacing:.5em;font-family:var(--font-mono);font-size:22px;text-align:center}
.sso-btn{width:100%;justify-content:center;padding:11px;font-size:15px;background:var(--side);color:#fff;border-color:var(--side)}
.sso-btn:hover{background:var(--side-2)}
.or{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px;margin:14px 0}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line)}
.alert{border-radius:12px;padding:10px 12px;font-size:13px;margin:10px 0}
.alert.err{background:color-mix(in srgb,#E5484D 12%,var(--surface));color:#B42318;border:1px solid color-mix(in srgb,#E5484D 30%,transparent)}
.alert.ok{background:color-mix(in srgb,var(--ok) 12%,var(--surface));color:var(--ok);border:1px solid color-mix(in srgb,var(--ok) 30%,transparent)}
.alert.info{background:var(--cyan-soft);color:var(--ink);border:1px solid color-mix(in srgb,var(--cyan) 30%,transparent)}
.check{display:flex!important;gap:8px;align-items:flex-start;font-weight:400!important;font-size:12.5px;color:var(--muted)}
.check input{width:auto!important;margin-top:2px;accent-color:var(--accent)}
.install,.adminpage{max-width:980px;margin:0 auto;padding:28px 16px 60px}
.brand-lg{display:flex;align-items:center;gap:14px;color:#fff;margin-bottom:14px}
.brand-lg .logo{width:46px;height:46px;font-size:16px}
.brand-lg h1{font-size:22px;color:#fff}
.brand-lg .muted{color:var(--side-muted)!important;margin:0}
.form{display:flex;flex-direction:column;gap:12px}
.form label{display:flex;flex-direction:column;gap:5px;font-size:12.5px;font-weight:600;color:var(--muted)}
.form input,.form select,.form textarea,.auth-card input{border:1px solid var(--line);border-radius:11px;padding:9px 12px;background:var(--bg);outline:0;font-weight:400;color:var(--ink)}
.form input:focus,.auth-card input:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent)}
textarea.code{width:100%;font-family:var(--font-mono);font-size:12px;border-radius:12px;padding:12px;margin:10px 0}
.adminpage nav{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.adminpage nav a{color:var(--side-ink);text-decoration:none;padding:7px 12px;border-radius:10px;background:rgba(255,255,255,.06);font-size:13px}
.adminpage nav a.on{background:var(--grad);color:#fff}
.adminpage .card{overflow-x:auto}
.adminpage form.inline{display:inline}
.adminpage td form{margin:0}
.kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}
.kv div{background:var(--surface-2);border-radius:12px;padding:10px 12px;font-size:13px}
.kv b{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:2px}

.cl-name{white-space:nowrap;flex-wrap:nowrap;max-width:100%;overflow:hidden}
.cl-name .pill{flex:none}