/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    flex-shrink: 0;
    transition: width 0.3s ease;
    position: relative;
}

.sidebar.collapsed {
    width: 80px;
    padding: var(--spacing-lg) var(--spacing-sm);
}

.brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .brand {
    justify-content: center;
}

.sidebar.collapsed .brand-text {
    display: none;
}

.brand span {
    color: var(--accent-primary);
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-item {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: var(--spacing-md) 0;
}

.sidebar.collapsed .nav-text {
    display: none;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.nav-item.active {
    background-color: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

/* Sidebar Footer & Toggle */
.sidebar-footer {
    /* Container is now just a placeholder for the absolute button */
    height: 0;
    padding: 0;
    margin: 0;
}

.sidebar.collapsed .sidebar-footer {
    justify-content: center;
}

.sidebar-toggle-btn {
    position: absolute;
    top: 50%;
    right: -12px;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-soft);
    z-index: 100;
    transition: all 0.2s ease;
    padding: 0;
}

.sidebar-toggle-btn:hover {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px rgba(108, 92, 231, 0.5);
    transform: translateY(-50%) scale(1.1);
}

.sidebar-toggle-btn .toggle-icon {
    font-size: 10px;
    transition: transform 0.3s ease;
}

.sidebar.collapsed .toggle-icon {
    transform: rotate(180deg);
}

/* Collapsed User Profile */
.sidebar.collapsed .user-profile {
    background: transparent;
    padding: var(--spacing-sm) 0;
    justify-content: center;
}

.sidebar.collapsed .user-info,
.sidebar.collapsed .btn-logout {
    display: none;
}

.sidebar.collapsed .user-avatar {
    width: 32px;
    height: 32px;
    margin: 0;
}