:root{--color-primary:#c4654a;--color-primary-hover:#a8533c;--color-bg:#faf6f4;--color-text:#3a2e2a;--color-text-secondary:#7a6560;--color-border:#e8dad5;--color-dark-bg:#3a2e2a;--color-dark-text:#e8b4a0;--color-white:#fff}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--color-bg);color:var(--color-text);height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;overflow:hidden}#app{flex-direction:column;height:100vh;display:flex}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-hover)}button{cursor:pointer;font-family:inherit}.header{background:var(--color-bg);color:var(--color-text);border-bottom:1px solid var(--color-border);flex-shrink:0;justify-content:space-between;align-items:center;height:56px;padding:0 24px;display:flex}.header-left{align-items:center;gap:16px;display:flex}.header .logo{color:var(--color-primary);letter-spacing:-.5px;align-items:center;gap:8px;font-size:18px;font-weight:600;text-decoration:none;display:flex}.header .logo .logo-img{width:auto;height:28px}.header .logo .service{color:var(--color-text-secondary);margin-left:8px;font-size:14px;font-weight:400}.header-right{align-items:center;gap:12px;display:flex}.btn{border:1px solid #0000;border-radius:6px;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:all .15s;display:inline-flex}.btn-primary{background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}.btn-primary:hover{background:var(--color-primary-hover);border-color:var(--color-primary-hover)}.btn-ghost{color:var(--color-text-secondary);background:0 0;border:none;padding:6px 12px}.btn-ghost:hover{color:var(--color-primary)}.btn-ghost.active{color:var(--color-primary);font-weight:600}.header-nav{align-items:center;gap:4px;display:flex}.header-user{align-items:center;gap:12px;display:flex}.user-email{color:var(--color-text-secondary);font-size:13px}.agent-selector{color:var(--color-text-secondary);align-items:center;gap:6px;font-size:13px;display:flex}.agent-selector label{font-weight:500}.agent-input{background:var(--color-white);border:1px solid var(--color-border);color:var(--color-text);border-radius:4px;width:140px;padding:4px 8px;font-family:inherit;font-size:13px}.agent-input::placeholder{color:var(--color-text-secondary);opacity:.6}.agent-input:focus{border-color:var(--color-primary);outline:none}.chat-layout{flex:1;display:flex;overflow:hidden}.sidebar{background:var(--color-white);border-right:1px solid var(--color-border);flex-direction:column;flex-shrink:0;width:240px;display:flex}.sidebar-header{text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-secondary);border-bottom:1px solid var(--color-border);padding:16px;font-size:12px;font-weight:600}.channel-list{flex:1;padding:8px;overflow-y:auto}.channel-item{cursor:pointer;color:var(--color-text);border-radius:6px;padding:8px 12px;font-size:14px;transition:background .15s}.channel-item:hover{background:var(--color-bg)}.channel-item.active{color:var(--color-primary);background:#c4654a1a;font-weight:500}.channel-item .prefix{color:var(--color-text-secondary);margin-right:4px}.chat-main{flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-header{border-bottom:1px solid var(--color-border);background:var(--color-white);flex-shrink:0;padding:12px 24px;font-size:16px;font-weight:600}.chat-header .prefix{color:var(--color-text-secondary);margin-right:4px}.messages{flex:1;padding:16px 24px;overflow-y:auto}.message{gap:12px;margin-bottom:16px;display:flex}.message-avatar{width:36px;height:36px;color:var(--color-primary);background:#c4654a26;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:14px;font-weight:600;display:flex}.message-content{flex:1;min-width:0}.message-meta{align-items:baseline;gap:8px;margin-bottom:4px;display:flex}.message-agent{color:var(--color-text);font-size:14px;font-weight:600}.message-time{color:var(--color-text-secondary);font-size:12px}.message-body{white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.5}.compose{border-top:1px solid var(--color-border);background:var(--color-white);flex-shrink:0;padding:16px 24px}.compose-inner{align-items:flex-end;gap:8px;display:flex}.compose textarea{border:1px solid var(--color-border);resize:none;min-height:42px;max-height:120px;color:var(--color-text);background:var(--color-bg);border-radius:8px;outline:none;flex:1;padding:10px 14px;font-family:inherit;font-size:14px;line-height:1.5;transition:border-color .15s}.compose textarea:focus{border-color:var(--color-primary)}.compose textarea::placeholder{color:var(--color-text-secondary)}.empty-state{color:var(--color-text-secondary);flex:1;justify-content:center;align-items:center;font-size:15px;display:flex}.login-page{flex:1;justify-content:center;align-items:center;display:flex}.login-card{text-align:center;background:var(--color-white);border-radius:12px;padding:48px;box-shadow:0 2px 12px #3a2e2a1a}.login-card h2{margin-bottom:8px}.login-card p{color:var(--color-text-secondary);margin-bottom:24px}.error-msg{color:#c44a4a;background:#fef2f2;border-radius:6px;margin:8px 24px;padding:8px 16px;font-size:13px}.loading{text-align:center;color:var(--color-text-secondary);padding:40px}.avatar{object-fit:cover;border-radius:50%;width:32px;height:32px}.avatar-link{text-decoration:none;border:none!important;padding:0!important}.avatar-link:hover{border:none!important}.avatar-placeholder{background:var(--color-border);width:32px;height:32px;color:var(--color-text-secondary);border-radius:50%;justify-content:center;align-items:center;font-size:.8rem;text-decoration:none;display:flex}.user-name{color:var(--color-text-secondary);font-size:.85rem}.nav-link{color:var(--color-text-secondary);border-radius:4px;padding:.3rem .5rem;font-size:.85rem;text-decoration:none}.nav-link:hover{color:var(--color-primary)}.nav-link.active{color:var(--color-primary);font-weight:600}