.top-nav {
    height: 60px;
    background-color: var(--top-nav-bg, #fff);
    border-bottom: 1px solid var(--border-color, #ddd);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.top-nav-left {
    display: flex;
    gap: 8px;
    align-items: center;
}

.top-nav-right {
    display: flex;
    gap: 16px;
    align-items: center;
}

.nav-btn {
    padding: 10px 16px;
    background-color: #000;
    border: 1px solid #000;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    background-color: #222;
    border-color: #222;
    color: #fff;
}

.nav-btn.active {
    background-color: #000;
    color: #fff;
    border-color: #000;
}

.btn-icon {
    font-size: 16px;
}

.btn-text {
    display: inline-block;
}

@media (max-width: 768px) {
    .btn-text {
        display: none;
    }

    .nav-btn {
        padding: 8px 12px;
    }
}

.settings-dropdown {
    position: relative;
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    font-size: 20px;
    color: var(--text-primary, #333);
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    color: var(--primary-color, #007bff);
}

.dropdown-content {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    background-color: white;
    border: 1px solid var(--border-color, #ddd);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    min-width: 180px;
}

.dropdown-username {
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary, #666);
    border-bottom: 1px solid var(--border-color, #ddd);
    border-radius: 6px 6px 0 0;
}

.dropdown-content button {
    width: 100%;
    padding: 12px 16px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary, #333);
    transition: background-color 0.2s ease;
}

.dropdown-content button:first-child {
    border-radius: 0;
}

.dropdown-content button:last-child {
    border-radius: 0 0 6px 6px;
}

.dropdown-content button:hover {
    background-color: var(--hover-bg, #e9ecef);
}

.dropdown-content hr {
    margin: 8px 0;
    border: none;
    border-top: 1px solid var(--border-color, #ddd);
}

.dropdown-content button:last-child:hover {
    background-color: var(--error-light, #ffebee);
    color: var(--error-color, #dc3545);
}

.collapse-toggle {
    margin-left: auto;
}

.top-nav-collapsed {
    height: 40px;
    background-color: var(--top-nav-bg, #fff);
    border-bottom: 1px solid var(--border-color, #ddd);
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.expand-toggle {
    font-size: 18px;
}