/* 1. Sidebar */
.sidebar {
    grid-area: sidebar;
    background-color: #000000;
    padding: 24px 8px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.sidebar .logo {
    font-size: 1.5em;
    font-weight: bold;
    padding: 0 16px 20px 16px;
    color: #ffffff;
}

.sidebar-nav ul li a,
.sidebar-nav ul li button {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    font-size: 0.9em;
    font-weight: bold;
    border-radius: 4px;
    margin-bottom: 8px;
}

.sidebar-nav ul li a.active,
.sidebar-nav ul li button.active {
    background-color: #282828;
    color: #ffffff;
}

.sidebar-nav ul li a svg,
.sidebar-nav ul li button svg {
    margin-right: 16px;
    width: 24px;
    height: 24px;
}

.sidebar-playlists {
    padding: 20px 16px 0 16px;
    border-top: 1px solid #282828;
    margin-top: 10px;
    flex-grow: 1;
    /* Allow playlists to take remaining space and scroll */
    overflow-y: auto;
}

.sidebar-playlists h4 {
    font-size: 0.75em;
    text-transform: uppercase;
    letter-spacing: .1em;
    margin-bottom: 10px;
    color: #b3b3b3;
}

.sidebar-playlists ul li a {
    display: block;
    padding: 8px 0;
    font-size: 0.85em;
    color: #b3b3b3;
}

.sidebar-playlists ul li a:hover {
    color: #ffffff;
}

.create-playlist-btn {
    font-size: 0.9em !important;
    font-weight: bold !important;
    color: #b3b3b3 !important;
}

.create-playlist-btn:hover {
    color: #ffffff !important;
}

.create-playlist-btn .plus-icon {
    background-color: #b3b3b3;
    color: #000;
    width: 24px;
    height: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2em;
    margin-right: 16px;
    border-radius: 2px;
}

.create-playlist-btn:hover .plus-icon {
    background-color: #ffffff;
}

/* Nút bật/tắt menu cho mobile (ban đầu ẩn trên desktop) */
.menu-toggle-btn {
    display: none;
    /* Sẽ được hiển thị bởi media query */
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 1001;
    background-color: rgba(30, 30, 30, 0.8);
    color: #fff;
    border: 1px solid #555;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 1.2em;
    cursor: pointer;
}

.menu-toggle-btn:hover {
    background-color: rgba(50, 50, 50, 0.9);
}