/* --- Header & Menu --- */
#chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background-color: var(--header-bg);
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-medium);
    position: sticky;
    top: 0;
    z-index: 10;
    width: 100%;
    height: 60px; /* Fixed height for header */
}

#header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

#menu-button, #theme-toggle, #persona-button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-medium);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: color 0.3s, background-color 0.3s;
}

#menu-button:hover, #theme-toggle:hover, #persona-button:hover {
    background-color: var(--light-gray);
}

body.dark-theme #menu-button:hover, 
body.dark-theme #theme-toggle:hover,
body.dark-theme #persona-button:hover {
    background-color: var(--dark-light-gray);
}

/* --- Header Updates --- */
#chat-header {
    justify-content: space-between;
}

#header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

#chat-menu-button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-medium);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: color 0.3s, background-color 0.3s;
}

#chat-menu-button:hover {
    background-color: var(--light-gray);
}

body.dark-theme #chat-menu-button:hover {
    background-color: var(--dark-light-gray);
}

/* Header user avatar style */
.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Chat Character Indicator in header */
.chat-character-indicator {
    display: flex;
    align-items: center;
    background-color: var(--light-gray);
    padding: 4px 8px;
    border-radius: 16px;
    margin-left: 12px;
    cursor: pointer;
    transition: background-color 0.2s;
}

body.dark-theme .chat-character-indicator {
    background-color: var(--dark-light-gray);
}

.chat-character-indicator:hover {
    background-color: var(--medium-gray);
}

body.dark-theme .chat-character-indicator:hover {
    background-color: var(--dark-medium-gray);
}

.chat-character-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: 6px;
}

.chat-character-name {
    font-size: 0.9em;
    color: var(--text-dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100px;
}