/* === 04_178 Messages & Notifications === */
.sf-msg-btn{margin-left:.5rem;border:1px solid #e5e7eb;border-radius:999px;background:#fff;padding:.25rem .6rem;cursor:pointer}
.sf-msg-center{position:fixed;right:1rem;bottom:1rem;width:min(92vw,960px);max-height:80vh;display:none;z-index:10000}
.sf-msg-center.open{display:block}
.sf-msg-center .pane{background:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.12);overflow:hidden;display:flex;flex-direction:column}
.sf-msg-center .head{display:flex;justify-content:space-between;align-items:center;padding:.5rem .75rem;border-bottom:1px solid #e5e7eb}
.sf-msg-center .cols{display:grid;grid-template-columns:240px 1fr;gap:0}
.sf-msg-center .threads{border-right:1px solid #e5e7eb;max-height:60vh;overflow:auto}
.sf-msg-center .threads .th{display:block;padding:.5rem .6rem;border-bottom:1px dashed #f1f5f9;text-decoration:none;color:#111}
.sf-msg-center .chat{display:flex;flex-direction:column;max-height:60vh}
.sf-msg-center .log{flex:1;overflow:auto;padding:.5rem}
.sf-msg-center .m{margin:.2rem 0}
.sf-msg-center .m .txt{display:inline-block;background:#f8fafc;border:1px solid #e5e7eb;border-radius:12px;padding:.35rem .6rem}
.sf-msg-center .m.mine .txt{background:#111;color:#fff;border-color:#111}
.sf-msg-center .composer{display:flex;gap:.5rem;padding:.5rem;border-top:1px solid #e5e7eb}
.sf-msg-center input{flex:1;border:1px solid #cbd5e1;border-radius:10px;padding:.4rem}
.sf-msg-center button{border:none;border-radius:10px;padding:.4rem .8rem;background:#111;color:#fff;cursor:pointer}