*{box-sizing:border-box}body{margin:0;font:14px/1.5 -apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:#0f1218;color:#e6e8ee}
.hidden{display:none!important}.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#0f1218}
.card{background:#181c25;padding:28px;border-radius:12px;display:flex;flex-direction:column;gap:10px;width:320px}
input,select,textarea,button{font:inherit;color:inherit;background:#222837;border:1px solid #2e3547;border-radius:8px;padding:7px 9px;width:100%}
button{background:#3a6df0;border:none;cursor:pointer;width:auto}button:hover{filter:brightness(1.1)}button.sm{padding:3px 9px;font-size:12px}button.ghost{background:transparent;border:1px solid #2e3547}
.err{color:#ff6b6b}.layout{display:grid;grid-template-columns:270px 1fr 320px;height:100vh}
.col{overflow:auto;padding:12px;border-right:1px solid #222837}.right{border-right:none;border-left:1px solid #222837}
.brand{font-size:20px;font-weight:700;margin-bottom:10px}.brand small{font-size:12px;color:#8a93a8;font-weight:400}
h3{font-size:13px;color:#8a93a8;margin:14px 0 6px;display:flex;justify-content:space-between;align-items:center}
section{margin-bottom:6px}details{margin:6px 0}details>*{margin-top:6px}
.list{list-style:none;padding:0;margin:0}.list li{padding:6px 8px;border-radius:6px;cursor:pointer;display:flex;justify-content:space-between;gap:6px;align-items:center}
.list li:hover{background:#1c2130}.list li.active{background:#26304a}.list.small li{font-size:12px;cursor:default}
.list li .x{color:#8a93a8;cursor:pointer}.muted{color:#8a93a8;font-size:12px}
.mid{display:flex;flex-direction:column;padding:0}.mid header{padding:12px 16px;border-bottom:1px solid #222837;font-weight:600}
#chat{flex:1;overflow:auto;padding:16px}.msg{margin-bottom:14px;max-width:900px}.msg .who{font-size:12px;color:#8a93a8;margin-bottom:3px}
.msg .body{background:#181c25;padding:10px 12px;border-radius:10px;white-space:pre-wrap;word-break:break-word}
.msg.user .body{background:#1f3160}.phase{text-align:center;color:#c6a64a;font-size:12px;margin:10px 0}
.composer{border-top:1px solid #222837;padding:10px 16px;display:grid;grid-template-columns:1fr auto;gap:8px}
#mentionBar{grid-column:1/3;display:flex;gap:6px;flex-wrap:wrap}#mentionBar span{background:#222837;border-radius:12px;padding:1px 9px;font-size:12px;cursor:pointer}
.board{font-size:12px;max-height:40vh;overflow:auto}.board div{border-left:3px solid #3a6df0;padding:4px 8px;margin-bottom:6px;background:#161a22;white-space:pre-wrap}
.board b{color:#9fb6ff}.row{display:flex;gap:6px;align-items:center;margin-top:6px}.row input{flex:1}
.tag{font-size:11px;color:#8a93a8}
@media(max-width:900px){.layout{grid-template-columns:1fr}.left,.right{max-height:40vh}}