/* Wrapper for Frontend */
.app-frontend {
    height: 94vh;
    margin: 3vh;
    display: flex;
    flex-direction: column;
    border: 1px solid #d1d7db;
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}
.app-frontend .frontend-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1.5rem;
    background: #f0f2f5;
    border-bottom: 1px solid #d1d7db;
    color: #333;
    height: 60px;
}
.app-frontend .brand { display: flex; align-items: center; gap: 10px; font-weight: bold; }
.app-frontend .frontend-app-shell { 
    display: flex; 
    flex: 1;
    overflow: hidden; 
    background: #fff;
}
.app-frontend .contacts-panel { 
    width: 350px; 
    border-right: 1px solid #d1d7db; 
    display: flex; 
    flex-direction: column;
    overflow-y: auto;
}
.app-frontend .contacts-search-box { padding: 10px; border-bottom: 1px solid #f0f2f5; }
.app-frontend .contact-item { 
    display: flex; 
    align-items: center; 
    padding: 12px 15px; 
    border-bottom: 1px solid #f2f2f2;
    cursor: pointer;
    transition: background 0.2s;
}
.app-frontend .contact-item:hover, .app-frontend .contact-item.active { background: #f5f6f6; }
.app-frontend .contact-avatar { 
    width: 45px; 
    height: 45px; 
    border-radius: 50%; 
    background: #00a884; 
    color: #fff; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-weight: bold;
    margin-right: 15px;
}
.app-frontend .contact-info { flex: 1; overflow: hidden; }
.app-frontend .contact-actions { cursor: pointer; color: #54656f; padding: 5px; }
.app-frontend .chat-panel { flex: 1; background: #e5ddd5; display: flex; flex-direction: column;}
.app-frontend .frontend-chat-header { 
    padding: 10px 15px; 
    background: #f0f2f5; 
    display: flex; 
    align-items: center;
    border-bottom: 1px solid #d1d7db;
}
.app-frontend .frontend-chat-body { flex: 1; padding: 20px; overflow-y: auto; display: flex; flex-direction: column;}
.app-frontend .frontend-chat-input-wrapper { padding: 10px; background: #f0f2f5; }

/* Message Bubble */
.message-bubble {
    position: relative;
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 4px;
    max-width: 70%;
    cursor: context-menu;
}
.message-bubble .msg-actions {
    display: none;
    position: absolute;
    top: 5px;
    right: 5px;
    z-index: 10;
}
.message-bubble:hover .msg-actions { display: block; }
.msg-time { font-size: 0.7rem; color: #999; margin-top: 4px; text-align: right; }
.dropdown-menu { font-size: 0.9rem; }