:root{--chat-green:#176a3d;--chat-deep:#103f29;--chat-soft:#eef7f0;--chat-line:#d9e7dc;--chat-text:#193629;--chat-muted:#718078}
*{box-sizing:border-box}
body.chat-body{margin:0;background:#f4f7f3;color:var(--chat-text);font-family:Arial,Helvetica,sans-serif}
.chat-top{height:72px;padding:0 clamp(16px,4vw,42px);display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--chat-line)}
.chat-brand{display:flex;align-items:center;gap:11px;color:var(--chat-text);text-decoration:none}
.chat-brand img{width:42px;height:42px;border-radius:12px;object-fit:contain;background:#fff}
.chat-brand b,.chat-brand small{display:block}.chat-brand small{margin-top:2px;color:var(--chat-muted)}
.chat-back{color:var(--chat-green);font-weight:800;text-decoration:none;font-size:13px}
.chat-shell{max-width:1120px;margin:28px auto;padding:0 18px}
.chat-card{background:#fff;border:1px solid var(--chat-line);border-radius:20px;box-shadow:0 16px 45px rgba(27,71,44,.08);overflow:hidden}
.chat-login{max-width:760px;margin:42px auto}
.chat-login .login-hero{padding:28px 30px;background:linear-gradient(135deg,#144e32,#237a49);color:#fff}
.chat-login .login-hero span{font-size:10px;font-weight:900;letter-spacing:.13em;color:#cce8d3}
.chat-login .login-hero h1{margin:8px 0 8px;font:700 34px/1.1 Georgia,serif}
.chat-login .login-hero p{margin:0;color:#dbeee1;line-height:1.55}
.chat-login-form{padding:28px 30px}
.chat-login-form label{display:grid;gap:7px;margin-bottom:14px;font-size:12px;font-weight:800}
.chat-login-form input{height:44px;border:1px solid #cfddd2;border-radius:10px;padding:0 12px;font:inherit}
.chat-login-form button,.chat-send button{border:0;background:var(--chat-green);color:#fff;border-radius:10px;font-weight:800;cursor:pointer}
.chat-login-form button{height:44px;width:100%}
.chat-login-foot{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:15px;font-size:12px;color:var(--chat-muted)}
.chat-login-foot a{color:var(--chat-green);font-weight:800;text-decoration:none}
.chat-alert{padding:11px 13px;border-radius:10px;margin:0 0 14px;background:#fff0ec;color:#9b3c2b;font-size:12px}
.member-chat{display:grid;grid-template-rows:auto minmax(420px,64vh) auto}
.chat-head{padding:18px 20px;display:flex;justify-content:space-between;align-items:center;gap:14px;border-bottom:1px solid var(--chat-line);background:#fff}
.chat-head-user{display:flex;align-items:center;gap:11px;min-width:0}
.chat-avatar{display:grid;place-items:center;flex:0 0 42px;width:42px;height:42px;border-radius:14px;background:#e8f5eb;color:var(--chat-green);font-weight:900}
.chat-head h1{font-size:16px;margin:0}.chat-head p{font-size:11px;margin:4px 0 0;color:var(--chat-muted)}
.chat-status{display:inline-flex;align-items:center;gap:6px;font-size:10px;font-weight:800;color:#4d6c5b}
.chat-status i{width:8px;height:8px;border-radius:50%;background:#39a767}
.chat-messages{padding:22px;overflow:auto;background:linear-gradient(180deg,#f8fbf8,#f3f7f3)}
.chat-empty{text-align:center;padding:80px 20px;color:var(--chat-muted)}
.chat-empty strong{display:block;color:var(--chat-text);font-size:18px;margin-bottom:7px}
.chat-day{text-align:center;margin:12px 0;color:#849188;font-size:10px}
.msg{display:flex;margin:8px 0}
.msg.member{justify-content:flex-end}.msg.admin{justify-content:flex-start}
.msg-bubble{max-width:min(72%,620px);padding:10px 12px;border-radius:14px;line-height:1.45;font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere}
.msg.member .msg-bubble{background:var(--chat-green);color:#fff;border-bottom-right-radius:4px}
.msg.admin .msg-bubble{background:#fff;border:1px solid var(--chat-line);color:var(--chat-text);border-bottom-left-radius:4px}
.msg-meta{display:block;margin-top:5px;font-size:9px;opacity:.72;text-align:right}
.chat-send{display:grid;grid-template-columns:1fr auto;gap:10px;padding:14px 16px;border-top:1px solid var(--chat-line);background:#fff}
.chat-send textarea{min-height:44px;max-height:120px;resize:none;border:1px solid #cfddd2;border-radius:12px;padding:11px 12px;font:13px/1.4 Arial}
.chat-send button{min-width:92px;padding:0 18px}
.chat-note{padding:0 18px 14px;background:#fff;color:#89958d;font-size:9.5px}
@media(max-width:640px){
 .chat-shell{margin:0;padding:0}.chat-card{border-radius:0;border-left:0;border-right:0}
 .member-chat{grid-template-rows:auto minmax(420px,calc(100vh - 212px)) auto}
 .chat-top{height:62px}.chat-brand small{display:none}
 .chat-messages{padding:14px}.msg-bubble{max-width:86%}.chat-login{margin:18px auto}
 .chat-login .login-hero,.chat-login-form{padding:22px 18px}
}


/* V86 layout safety */
.member-chat{min-height:0}
.chat-messages{min-height:0}
.chat-send{flex-shrink:0}