:root{
  --bg:#eef1f7;
  --panel:#ffffff;
  --sidebar:#171f33;
  --sidebar-2:#1e2942;
  --sidebar-line:#2a3654;
  --accent:#4f6df5;
  --accent-2:#6f8bff;
  --text:#1b2337;
  --muted:#7b8499;
  --line:#e3e8f2;
  --ok:#28c07a;
  --danger:#e5484d;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;
}
button{font:inherit;cursor:pointer;border:0}
input,textarea{font:inherit;color:inherit}
.hidden{display:none !important}

/* ---------- auth ---------- */
.auth{
  min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:24px;
  background:
    radial-gradient(900px 500px at 15% 10%,rgba(111,139,255,.35),transparent 60%),
    radial-gradient(700px 500px at 85% 90%,rgba(79,109,245,.28),transparent 60%),
    linear-gradient(140deg,#141c31 0%,#1d2a4c 55%,#243463 100%);
}
.auth-card{
  width:min(400px,100%);background:var(--panel);border-radius:22px;padding:34px 32px 28px;
  box-shadow:0 30px 80px rgba(6,12,30,.45);
}
.logo{font-size:30px;font-weight:800;letter-spacing:2px;text-align:center}
.logo b{color:var(--accent)}
.sub{margin:8px 0 24px;text-align:center;color:var(--muted);font-size:13px}
.tabs{display:flex;gap:6px;background:#f1f4fa;padding:5px;border-radius:12px;margin-bottom:20px}
.tab{flex:1;padding:9px;border-radius:9px;background:transparent;color:var(--muted);font-weight:600;font-size:14px}
.tab.active{background:#fff;color:var(--text);box-shadow:0 2px 8px rgba(30,45,90,.1)}
#authForm{display:flex;flex-direction:column;gap:14px}
#authForm label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#4a556e;font-weight:600}
#authForm input{
  border:1px solid var(--line);border-radius:10px;padding:11px 12px;font-size:14px;outline:none;
  background:#fbfcff;transition:border-color .15s,box-shadow .15s;
}
#authForm input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,109,245,.14)}
.primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-weight:700;
  border-radius:10px;padding:11px 18px;box-shadow:0 8px 18px rgba(79,109,245,.28);
}
.primary:active{transform:translateY(1px)}
.primary:disabled{opacity:.55;cursor:default;box-shadow:none}
.hint{min-height:18px;margin:0;font-size:12.5px;color:var(--danger);text-align:center}

/* ---------- app ---------- */
.app{display:flex;height:100dvh;overflow:hidden}
.sidebar{
  width:300px;flex:0 0 300px;background:var(--sidebar);color:#e8edfa;display:flex;flex-direction:column;
  border-right:1px solid #0f1728;
}
.me{display:flex;align-items:center;gap:10px;padding:18px 16px 14px}
.avatar{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#5d7bff,#8f6bff);font-size:15px;flex:none;user-select:none;
}
.me .avatar{width:42px;height:42px;border-radius:13px}
.me-text{min-width:0;display:flex;flex-direction:column;line-height:1.25}
.me-text b{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.me-text small{color:#8b97b5;font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ghost{background:transparent;color:#9aa6c4;font-size:12px;padding:6px 8px;border-radius:8px}
.ghost:hover{background:rgba(255,255,255,.07);color:#fff}
.me .ghost{margin-left:auto}
.search{display:flex;gap:8px;align-items:center;padding:0 14px 12px}
.search input{
  width:100%;background:var(--sidebar-2);border:1px solid var(--sidebar-line);border-radius:10px;
  padding:9px 12px;color:#e8edfa;font-size:13px;outline:none;
}
.search input::placeholder{color:#7683a3}
.search input:focus{border-color:#41527e}
.section{
  padding:14px 18px 8px;font-size:11px;letter-spacing:1.2px;color:#7683a3;font-weight:700;
  display:flex;align-items:center;justify-content:space-between;text-transform:uppercase;
}
.count{font-size:11px;color:#5f6d8f;letter-spacing:0;font-weight:500}
.people{flex:1;overflow-y:auto;padding:2px 10px 14px}
.people::-webkit-scrollbar,.messages::-webkit-scrollbar{width:8px}
.people::-webkit-scrollbar-thumb{background:#2d3a5a;border-radius:8px}
.messages::-webkit-scrollbar-thumb{background:#ccd4e6;border-radius:8px}

.chan,.person{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:11px;cursor:pointer;position:relative;
}
.chan{color:#dfe6f8;font-weight:600;font-size:14px}
.chan .icon{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#3d56a8,#5b78e0);display:grid;place-items:center;font-size:15px}
.chan:hover,.person:hover{background:rgba(255,255,255,.06)}
.chan.active,.person.active{background:linear-gradient(135deg,rgba(79,109,245,.35),rgba(79,109,245,.18));box-shadow:inset 0 0 0 1px rgba(120,145,255,.35)}
.person .avatar{width:34px;height:34px;border-radius:10px;font-size:13px}
.person .p-text{min-width:0;flex:1;display:flex;flex-direction:column;line-height:1.3}
.person .p-text b{font-size:13.5px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.person .p-text small{font-size:11.5px;color:#7f8cab;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.presence{width:9px;height:9px;border-radius:50%;background:#4a5878;flex:none;border:2px solid var(--sidebar);box-sizing:content-box}
.presence.on{background:var(--ok);box-shadow:0 0 0 3px rgba(40,192,122,.12)}
.badge{
  min-width:19px;height:19px;border-radius:10px;background:var(--danger);color:#fff;font-size:11px;font-weight:700;
  display:grid;place-items:center;padding:0 6px;flex:none;
}

/* ---------- chat ---------- */
.main{flex:1;min-width:0;display:flex;flex-direction:column;background:#f6f8fc}
.chat-head{
  height:64px;flex:none;display:flex;align-items:center;gap:12px;padding:0 20px;background:#fff;
  border-bottom:1px solid var(--line);
}
.peer{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.peer b{font-size:15px}
.peer small{font-size:12px;color:var(--muted)}
.conn{margin-left:auto;font-size:11.5px;padding:5px 10px;border-radius:20px;background:#eef1f7;color:var(--muted);display:flex;align-items:center;gap:6px}
.conn::before{content:"";width:7px;height:7px;border-radius:50%;background:#b9c2d6}
.conn.online{background:rgba(40,192,122,.1);color:#17945c}
.conn.online::before{background:var(--ok);box-shadow:0 0 0 3px rgba(40,192,122,.16)}
.conn.offline{background:rgba(229,72,77,.09);color:#c33b40}
.conn.offline::before{background:var(--danger)}
.menu{display:none;color:var(--text);font-size:18px;padding:6px 10px}

.messages{flex:1;overflow-y:auto;padding:22px 24px 8px;display:flex;flex-direction:column;gap:2px}
.day{text-align:center;margin:14px 0 10px;font-size:11.5px;color:#9aa3b8}
.day span{background:#e9edf6;padding:3px 10px;border-radius:10px}
.row{display:flex;gap:10px;margin:5px 0;align-items:flex-end;animation:pop .16s ease-out}
.row.mine{flex-direction:row-reverse}
.row .avatar{width:32px;height:32px;border-radius:9px;font-size:12px}
.body{max-width:min(66%,620px);display:flex;flex-direction:column;gap:4px}
.row.mine .body{align-items:flex-end}
.meta{font-size:11.5px;color:#98a1b6;padding:0 4px}
.bubble{
  background:#fff;border:1px solid var(--line);padding:9px 13px;border-radius:13px 13px 13px 4px;
  font-size:14px;line-height:1.55;white-space:pre-wrap;word-break:break-word;box-shadow:0 1px 2px rgba(24,38,74,.04);
}
.row.mine .bubble{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border:0;
  border-radius:13px 13px 4px 13px;box-shadow:0 6px 16px rgba(79,109,245,.22);
}
.bubble.pending{opacity:.75}
.bubble .state{display:block;margin-top:3px;font-size:10.5px;opacity:.65;text-align:right}
@keyframes pop{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

.typing{height:24px;padding:0 26px;font-size:12px;color:var(--muted);flex:none}
.composer{
  flex:none;display:flex;gap:10px;align-items:flex-end;padding:12px 20px 18px;background:#fff;border-top:1px solid var(--line);
}
.composer textarea{
  flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:11px 14px;font-size:14px;line-height:1.5;
  max-height:150px;outline:none;background:#fbfcff;
}
.composer textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,109,245,.12)}
.composer .primary{padding:11px 20px;border-radius:11px;flex:none}

.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#232c44;color:#fff;
  padding:9px 16px;border-radius:10px;font-size:13px;box-shadow:0 10px 30px rgba(0,0,0,.25);z-index:50;
  animation:pop .18s ease-out;
}
.scrim{position:fixed;inset:0;background:rgba(12,18,34,.45);z-index:8}

@media (max-width:820px){
  .sidebar{position:fixed;inset:0 auto 0 0;z-index:9;transform:translateX(-102%);transition:transform .22s ease;box-shadow:20px 0 50px rgba(0,0,0,.3)}
  .app.open .sidebar{transform:none}
  .menu{display:block}
  .messages{padding:16px 14px 6px}
  .body{max-width:78%}
  .composer{padding:10px 12px 14px}
}
/* ---------- roles / admin ---------- */
.role-chip{
  display:inline-block;margin-top:3px;padding:1px 7px;border-radius:8px;font-size:10.5px;
  font-weight:700;letter-spacing:.5px;width:fit-content;line-height:1.6;
}
.role-chip.owner{background:linear-gradient(135deg,#f6c453,#ef8f2f);color:#3b2400;box-shadow:0 2px 8px rgba(240,150,40,.28)}
.role-chip.admin{background:rgba(79,109,245,.16);color:#5b76ff;border:1px solid rgba(79,109,245,.28)}
.sidebar .role-chip.admin{color:#9db1ff;border-color:rgba(120,145,255,.35);background:rgba(79,109,245,.2)}
.admin-btn{
  background:rgba(79,109,245,.1);color:#3f5ae0;font-weight:700;font-size:12.5px;
  padding:7px 12px;border-radius:9px;border:1px solid rgba(79,109,245,.18);
}
.admin-btn:hover{background:rgba(79,109,245,.18);color:#2d45c9}
.mute-bar{
  flex:none;margin:0 20px 8px;padding:9px 12px;border-radius:10px;text-align:center;
  background:#fff6e8;border:1px solid #ffe2bf;color:#9a5b00;font-size:12.5px;font-weight:600;
}
.composer textarea:disabled{background:#f1f3f8;color:#9aa3b8;cursor:not-allowed}
.composer button:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}

.modal{position:fixed;inset:0;z-index:40;background:rgba(10,16,30,.55);display:flex;align-items:center;justify-content:center;padding:20px;backdrop-filter:blur(2px)}
.modal-card{
  width:min(540px,100%);max-height:82dvh;overflow-y:auto;background:#fff;border-radius:18px;
  padding:22px 24px 18px;box-shadow:0 30px 80px rgba(8,14,30,.45);animation:pop .18s ease-out;
}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.modal-head b{font-size:17px}
.modal-close{font-size:22px;line-height:1;color:#8b95ab;padding:2px 8px}
.modal-close:hover{background:#f0f3fa;color:#2b3450}
.modal-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px solid var(--line)}
.modal-row-text{display:flex;flex-direction:column;gap:4px}
.modal-row-text b{font-size:14px}
.modal-row-text small{color:var(--muted);font-size:12px;line-height:1.5}
.modal-title{margin:16px 0 6px;font-size:11px;letter-spacing:1.2px;color:#8b95ab;font-weight:700;text-transform:uppercase}
.modal-hint{margin:14px 0 0;font-size:12px;color:var(--muted);line-height:1.6}
.switch{position:relative;display:inline-block;width:46px;height:26px;flex:none}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:#d8deec;border-radius:999px;transition:background .18s;cursor:pointer}
.switch span::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,.2);transition:transform .18s}
.switch input:checked + span{background:var(--accent)}
.switch input:checked + span::after{transform:translateX(20px)}
.member-list{max-height:300px;overflow-y:auto;padding-right:4px}
.member{display:flex;align-items:center;gap:10px;padding:8px 2px}
.member .avatar{width:32px;height:32px;border-radius:9px;font-size:12px}
.member .m-text{flex:1;min-width:0;display:flex;flex-direction:column;line-height:1.3}
.member .m-text b{font-size:13.5px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.member .m-text small{font-size:11.5px;color:var(--muted)}
.member select{
  border:1px solid var(--line);background:#fbfcff;border-radius:8px;padding:5px 8px;font-size:12.5px;
  color:#33405c;outline:none;
}
.member select:focus{border-color:var(--accent)}
.member .role-label{font-size:11.5px;font-weight:700;color:#8b95ab}
.load-more{display:block;margin:2px auto 10px;padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#5a6b8c;font-size:12px}
.load-more:hover{border-color:#c3cee4;color:#35466a}

.attach{font-size:20px;line-height:1;color:#7b8499;padding:8px 10px;border-radius:10px;flex:none}
.attach:hover{background:#f0f3fa;color:#4f6df5}
.upload-bar{flex:none;display:flex;align-items:center;gap:10px;margin:0 20px 8px;padding:8px 12px;background:#f4f7ff;border:1px solid #dfe6fb;border-radius:10px;font-size:12px;color:#4a5a80}
.upload-track{flex:1;height:6px;background:#e2e8f8;border-radius:99px;overflow:hidden}
.upload-track i{display:block;height:100%;width:0;background:linear-gradient(90deg,#4f6df5,#6f8bff);transition:width .15s}
#uploadName{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bubble.media{padding:5px}
.media-img{display:block;max-width:320px;max-height:320px;border-radius:9px;cursor:zoom-in;background:#eef1f7}
.media-video{display:block;max-width:420px;max-height:320px;border-radius:9px;background:#000}
.bubble-text{display:block;margin-top:6px;white-space:pre-wrap;word-break:break-word}
.meta{display:flex;align-items:center;gap:6px}
.msg-del{margin-left:6px;background:none;border:0;padding:0;font-size:11px;color:#b8c0d0;cursor:pointer}
.msg-del:hover{color:var(--danger)}

/* ---------- announcements ---------- */
.announce-btn{background:rgba(245,180,60,.12);color:#9a6a10;font-weight:700;font-size:12.5px;padding:7px 12px;border-radius:9px;border:1px solid rgba(245,180,60,.25)}
.announce-btn:hover{background:rgba(245,180,60,.2);color:#7d5508}
.announce-bar{
  flex:none;display:flex;align-items:center;gap:10px;padding:10px 20px;background:#fffaef;
  border-bottom:1px solid #f3e3c0;cursor:pointer;
}
.announce-bar:hover{background:#fff6e2}
.pin-icon{font-size:15px;flex:none}
.announce-summary{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px;line-height:1.35}
.announce-summary b{font-size:13px;color:#7a5410;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.announce-summary span{font-size:12.5px;color:#8f7140;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.announce-more{flex:none;color:#9a6a10;font-size:12px;padding:4px 8px;border-radius:8px}
.announce-more:hover{background:rgba(245,180,60,.16);color:#7d5508}

.announce-list{display:flex;flex-direction:column;gap:10px;max-height:320px;overflow-y:auto;margin:6px 0 10px}
.announce-item{background:#fffaef;border:1px solid #f3e3c0;border-radius:12px;padding:12px 14px}
.announce-item h4{margin:0 0 6px;font-size:14px;color:#6f4c0d}
.announce-item p{margin:0;font-size:13px;line-height:1.6;color:#5b4a2a;white-space:pre-wrap;word-break:break-word}
.announce-item .a-meta{display:flex;align-items:center;gap:8px;margin-top:8px;font-size:11.5px;color:#a08a63}
.announce-item .a-del{margin-left:auto;background:none;border:0;color:#c0a87c;font-size:11.5px;cursor:pointer;padding:0}
.announce-item .a-del:hover{color:var(--danger)}
.announce-empty{text-align:center;color:var(--muted);font-size:13px;padding:18px 0}
.announce-compose{border-top:1px solid var(--line);padding-top:12px;display:flex;flex-direction:column;gap:10px}
.announce-input,.announce-textarea{
  width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:13.5px;
  outline:none;background:#fbfcff;color:var(--text);font-family:inherit;
}
.announce-input:focus,.announce-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,109,245,.12)}
.announce-textarea{min-height:100px;resize:vertical;line-height:1.6}
.announce-compose .primary{align-self:flex-end;padding:9px 18px;border-radius:10px}.msg-pin{margin-left:6px;background:none;border:0;padding:0;font-size:11px;color:#c8a45e;cursor:pointer}
.msg-pin:hover{color:#9a7416}
.empty-hint{display:flex;align-items:center;justify-content:center;height:100%;padding:24px;color:#8b95a5;font-size:14px;line-height:1.8;text-align:center}

.search input{flex:1;min-width:0}
.sound-toggle{flex:none;width:38px;height:38px;padding:0;font-size:16px;line-height:1;border-radius:10px}
.sound-toggle:hover{background:rgba(120,145,255,.18)}