:root{
  --bg:#f4f6fb; --surface:#ffffff; --surface-2:#f8faff; --navy:#0b1630; --ink:#0b1630;
  --muted:#5b6785; --line:#e6ebf5; --line-2:#d9e0ee; --blue:#2f6bff; --blue-soft:#e4ecff;
  --green:#2e9e6a; --amber:#c99a2e; --red:#c2413b; --side:#0b1630; --side-ink:#e8edf8;
  --radius:12px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0c1222; --surface:#131c33; --surface-2:#18233f; --ink:#e8edf8; --muted:#97a3c2;
    --line:#22304f; --line-2:#2d3c60; --blue-soft:#1d2d55;
  }
}
:root[data-theme="dark"]{
  --bg:#0c1222; --surface:#131c33; --surface-2:#18233f; --ink:#e8edf8; --muted:#97a3c2;
  --line:#22304f; --line-2:#2d3c60; --blue-soft:#1d2d55;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased}
.hidden{display:none !important}
button{font:inherit;cursor:pointer}
input,textarea{font:inherit;color:var(--ink)}

/* ---------- auth ---------- */
.auth{min-height:100%;display:flex;align-items:center;justify-content:center;padding:16px;background:linear-gradient(160deg,#0b1630,#1f4fd6)}
.auth-card{width:100%;max-width:380px;background:var(--surface);border-radius:18px;padding:28px;box-shadow:0 30px 70px rgba(0,0,0,.25)}
.auth-logo{font-weight:750;font-size:22px;letter-spacing:-.01em}
.auth-sub{margin:4px 0 18px;color:var(--muted)}
.auth-card form{display:flex;flex-direction:column;gap:12px}
label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:13px}
input[type=text],input:not([type]),input[type=password],input[type=date],textarea{
  height:40px;padding:0 12px;border-radius:10px;border:1px solid var(--line-2);background:var(--surface);outline:none;font-weight:400}
input:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 18%,transparent)}
.hint{color:var(--muted);font-size:13px}
.err{color:var(--red);font-size:13px;min-height:1em}
.ok{color:var(--green);font-size:13px;margin-top:10px}
.link{background:none;border:0;color:var(--blue);padding:0;font-weight:600;align-self:flex-start}

/* ---------- buttons ---------- */
.btn{height:40px;padding:0 16px;border-radius:10px;border:1px solid transparent;font-weight:600}
.btn.primary{background:var(--blue);color:#fff}
.btn.primary:hover{filter:brightness(1.05)}
.btn.wide,.wide{width:100%}
.ghost{height:36px;padding:0 12px;border-radius:10px;border:1px solid var(--line-2);background:var(--surface);color:var(--ink);font-weight:600}
.ghost:hover{background:var(--surface-2)}
.icon-btn{width:24px;height:24px;border-radius:6px;border:0;background:transparent;color:inherit;opacity:.7;font-size:18px;line-height:1}
.icon-btn:hover{opacity:1;background:rgba(255,255,255,.08)}
.danger{color:var(--red)}

/* ---------- layout ---------- */
.app{display:grid;grid-template-columns:260px 1fr;height:100%}
.side{background:var(--side);color:var(--side-ink);display:flex;flex-direction:column;min-height:0}
.brand{padding:18px 18px 10px;font-weight:750;font-size:18px;letter-spacing:-.01em}
.me-card{display:flex;align-items:center;gap:10px;margin:0 12px 10px;padding:10px;border:0;border-radius:12px;background:rgba(255,255,255,.06);color:inherit;text-align:left}
.me-card:hover{background:rgba(255,255,255,.1)}
.me-text{min-width:0;display:flex;flex-direction:column}
.me-text b{font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.status{display:inline-flex;align-items:center;gap:6px;font-size:12px;opacity:.75}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#7b8aa8;flex:0 0 9px}
.dot.available{background:var(--green)}
.dot.away{background:var(--amber)}
.dot.offline{background:#7b8aa8}
.side-scroll{flex:1;overflow:auto;padding:4px 8px}
.side-sec{display:flex;align-items:center;justify-content:space-between;padding:12px 10px 6px;font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;opacity:.6}
.list{list-style:none;margin:0;padding:0}
.list li{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:9px;cursor:pointer;font-size:14px;min-width:0}
.list li:hover{background:rgba(255,255,255,.07)}
.list li.on{background:rgba(255,255,255,.14);color:#fff}
.list li .nm{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.list li .hash{opacity:.55;width:14px;text-align:center}
.list li.dim{opacity:.55}
.badge{min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:var(--blue);color:#fff;font-size:11.5px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}
.side-foot{padding:10px;display:flex;flex-direction:column;gap:8px;border-top:1px solid rgba(255,255,255,.08)}
.side-foot .ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12);color:var(--side-ink)}
.av{width:36px;height:36px;border-radius:50%;flex:0 0 36px;display:inline-grid;place-items:center;font-weight:700;font-size:12.5px;background:var(--blue-soft);color:var(--blue);overflow:hidden;background-size:cover;background-position:center}
.av img{width:100%;height:100%;object-fit:cover}
.av.sm{width:28px;height:28px;flex:0 0 28px;font-size:11px}

.main{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--bg)}
.chat-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 22px;background:var(--surface);border-bottom:1px solid var(--line)}
.chat-title h2{margin:0;font-size:17px;font-weight:750}
.chat-title .sub{color:var(--muted);font-size:12.5px}
.head-actions{display:flex;gap:8px}
.admin-note{padding:9px 22px;background:#fdebd9;color:#7a3a08;font-size:13px;border-bottom:1px solid #f5d2ad}
.feed{flex:1;overflow:auto;padding:16px 22px;display:flex;flex-direction:column;gap:2px;min-height:0}
.day{align-self:center;margin:12px 0 6px;font-size:12px;color:var(--muted);background:var(--surface);border:1px solid var(--line);padding:3px 10px;border-radius:999px}
.msg{display:grid;grid-template-columns:36px minmax(0,1fr);gap:10px;padding:6px 8px;border-radius:10px;position:relative}
.msg:hover{background:var(--surface)}
.msg.grouped{padding-top:1px}
.msg.grouped .av{visibility:hidden}
.msg .content{min-width:0}
.menu-btn{display:none}
.msg .head{display:flex;align-items:baseline;gap:8px}
.msg .who{font-weight:700}
.msg .time{color:var(--muted);font-size:11.5px}
.msg .edited{color:var(--muted);font-size:11px}
.msg .text{word-wrap:break-word;overflow-wrap:anywhere;white-space:normal}
.msg .text.del{color:var(--muted);font-style:italic}
.msg .gif{max-width:280px;max-height:220px;border-radius:10px;display:block;margin-top:4px}
.rx{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.chip{height:26px;padding:0 9px;border-radius:999px;border:1px solid var(--line-2);background:var(--surface);color:var(--ink);font-size:13px;display:inline-flex;align-items:center;gap:5px}
.chip.mine{border-color:var(--blue);background:var(--blue-soft)}
.chip.add{color:var(--muted)}
.acts{position:absolute;right:8px;top:-12px;display:none;gap:2px;background:var(--surface);border:1px solid var(--line-2);border-radius:9px;padding:2px;box-shadow:0 6px 16px rgba(0,0,0,.08)}
.msg:hover .acts{display:flex}
.acts button{height:28px;min-width:28px;padding:0 6px;border:0;background:transparent;border-radius:7px;color:var(--ink)}
.acts button:hover{background:var(--surface-2)}
.edit-box{width:100%;min-height:38px;padding:8px 10px;border-radius:10px;border:1px solid var(--blue);background:var(--surface);resize:vertical}

.join{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 22px;background:var(--surface);border-top:1px solid var(--line);color:var(--muted)}
.composer{display:flex;align-items:flex-end;gap:8px;padding:12px 18px;background:var(--surface);border-top:1px solid var(--line)}
.composer textarea{flex:1;min-height:40px;max-height:140px;padding:10px 12px;resize:none;border-radius:12px}
.tool{height:40px;min-width:40px;padding:0 8px;border-radius:10px;border:1px solid var(--line-2);background:var(--surface);font-weight:700;font-size:13px}
.tool:hover{background:var(--surface-2)}
.send{height:40px}

/* ---------- popups ---------- */
.pop{position:fixed;z-index:50;background:var(--surface);border:1px solid var(--line-2);border-radius:14px;box-shadow:0 18px 40px rgba(0,0,0,.18);padding:10px;width:300px;max-height:340px;overflow:auto}
.emoji-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:4px}
.emoji-grid button{height:34px;border:0;background:transparent;border-radius:8px;font-size:20px}
.emoji-grid button:hover{background:var(--surface-2)}
.gif-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:8px}
.gif-grid img{width:100%;border-radius:8px;cursor:pointer;display:block;aspect-ratio:4/3;object-fit:cover;background:var(--surface-2)}
.pop input{width:100%;height:36px;padding:0 10px;border-radius:9px;border:1px solid var(--line-2);background:var(--surface);color:var(--ink)}

.modal{position:fixed;inset:0;background:rgba(7,12,28,.5);display:flex;align-items:center;justify-content:center;padding:16px;z-index:60}
.modal-card{width:100%;max-width:460px;max-height:90vh;overflow:auto;background:var(--surface);color:var(--ink);border-radius:16px;padding:22px;box-shadow:0 30px 70px rgba(0,0,0,.3);display:flex;flex-direction:column;gap:12px}
.modal-card h3{margin:0;font-size:18px}
.modal-card .row{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.check-list{display:flex;flex-direction:column;gap:4px;max-height:260px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:6px}
.check-list label{flex-direction:row;align-items:center;font-weight:500;padding:6px;border-radius:8px}
.check-list label:hover{background:var(--surface-2)}
.check-list input{width:16px;height:16px;accent-color:var(--blue)}
.tabs{display:flex;gap:6px;flex-wrap:wrap}
.tabs button{height:32px;padding:0 12px;border-radius:999px;border:1px solid var(--line-2);background:var(--surface);color:var(--ink);font-weight:600}
.tabs button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.tbl{width:100%;border-collapse:collapse}
.tbl td,.tbl th{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;font-size:13.5px}
.tbl th{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11.5px;font-weight:700;background:var(--surface-2);border:1px solid var(--line-2)}
.tag.warn{background:#fdebd9;color:#9a4d0d;border-color:#f5d2ad}
.tag.red{background:#fde8e6;color:#9b2f29;border-color:#f5c4c0}
.tag.ok{background:#e6f7ef;color:#1f7a52;border-color:#bfe8d3}
.temp{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:20px;letter-spacing:.08em;background:var(--surface-2);border:1px dashed var(--line-2);border-radius:10px;padding:12px;text-align:center;user-select:all}
.privacy-box{border:1px solid var(--line);border-radius:12px;padding:12px;background:var(--surface-2);font-size:13px}
.mention{color:var(--blue);background:var(--blue-soft);border-radius:5px;padding:0 4px;font-weight:600}
.msg.mentioned{background:rgba(201,154,46,.14)}
.msg.mentioned:hover{background:rgba(201,154,46,.2)}
.badge.men{background:var(--red);margin-right:4px}
.mrow{display:flex;align-items:center;gap:10px;width:100%;border:0;background:transparent;padding:8px;border-radius:9px;text-align:left;color:var(--ink)}
.mrow:hover,.mrow.on{background:var(--surface-2)}
.mrow small{color:var(--muted)}
.build{font-size:11px;opacity:.55;text-align:center;padding:2px 0 4px;color:var(--side-ink)}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--navy);color:#fff;padding:10px 16px;border-radius:12px;z-index:90;box-shadow:0 12px 30px rgba(0,0,0,.25);max-width:90vw}

@media (max-width:820px){
  .app{grid-template-columns:1fr}
  .side{display:none}
  .app.show-side .side{display:flex;position:fixed;inset:0;z-index:40;width:280px}
  .chat-head{padding:12px 14px}
  .feed{padding:12px 12px}
  .composer{padding:10px 10px}
  .acts{display:flex}
  .admin-note{padding:8px 14px}
}