.sidebar {
    width: 240px;
    height: 100vh;
    background-color: rgba(var(--sidebar-bg-color-rgb), var(--sidebar-bg-opacity));
    border-right: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    left: 0;
    padding: 2rem 0;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease-in-out, background-color 0.5s ease, border-color 0.5s ease;
    overflow-y: auto;
    flex-shrink: 0;
    z-index: 50;
    backdrop-filter: blur(var(--blur-strength));
    -webkit-backdrop-filter: blur(var(--blur-strength));
}
.sidebar-header {
    display: flex;
    align-items: center;
    padding: 0 1.5rem 2rem 1.5rem;
    position: relative;
}
.logo {
    display: flex;
    align-items: center;
    flex-grow: 1;
    justify-content: center;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.logo:hover {
    transform: scale(1.05);
}
.logo-image {
    max-height: 40px;
    width: auto;
}
.sidebar .menu-toggle {
    display: none; 
}
.logo-text {
    font-size: 1.5rem;
    font-weight: 600;
}
.logo-highlight {
    background-color: var(--accent-color);
    color: #ffffff;
    padding: 2px 8px;
    border-radius: 6px;
    margin-left: 8px;
    transition: background-color 0.5s ease, color 0.5s ease;
}
.main-content {
    flex-grow: 1;
    padding: 3rem 4rem;
    margin-left: 0;
    transition: all 0.3s ease-in-out;
    max-width: calc(100% - 240px);
    flex-shrink: 1;
    background-color: transparent;
    display: flex;
    flex-direction: column;
    position: relative;
}
.search-container,
#categories-container,
.about-container {
    max-width: 1400px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}
.search-container {
    transition: max-width 0.4s ease-in-out;
}
#mobile-menu-toggle-placeholder {
    display: none;
    margin-bottom: 2rem;
    display: flex;
    justify-content: flex-start;
}
.main-footer {
    padding: 2rem 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    text-align: center;
    margin-top: auto;
}
.main-footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: opacity 0.3s ease;
}
.main-footer a:hover {
    opacity: 0.8;
}