/* Sidebar Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 320px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(0);
}

.sidebar.hidden {
    transform: translateX(-100%);
}

.sidebar-header {
    height: 72px;
    /* Match header height roughly */
    padding: 0 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}

.close-sidebar-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}

.close-sidebar-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.main-content {
    flex: 1;
    margin-left: 320px;
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: calc(100% - 320px);
}

.main-content.expanded {
    margin-left: 0;
    width: 100%;
}

/* Override Header/Main sizing for new layout */
.header,
.main,
.footer {
    width: 100%;
    max-width: 800px;
}

.header-left {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    position: relative;
}

.toggle-sidebar-btn {
    position: absolute;
    left: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    pointer-events: none;
}

.main-content.expanded .toggle-sidebar-btn {
    opacity: 1;
    pointer-events: auto;
}

/* Enhanced Library Items */
.library-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.library-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.library-item:hover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.05);
}

.library-item h4 {
    margin-bottom: 4px;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.library-item p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Mini Videos in Sidebar */
.mini-videos {
    display: flex;
    gap: 6px;
    margin-top: 10px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.mini-videos::-webkit-scrollbar {
    height: 4px;
}

.mini-videos::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

.mini-video-link {
    flex-shrink: 0;
    width: 80px;
    height: 45px;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
    background: #000;
    display: block;
}

.mini-video-link video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    }

    .sidebar.visible {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        width: 100%;
    }

    .toggle-sidebar-btn {
        opacity: 1;
        pointer-events: auto;
        position: static;
        /* In flow on mobile */
    }

    .header-left {
        justify-content: flex-start;
    }

    .logo {
        margin: 0 auto;
        padding-right: 40px;
    }
}