.app-side-col {
    grid-column: 1;
    grid-row: 1 / 3;
    width: 260px;
    min-width: 0;
    flex-shrink: 0;
    
}


.app-side-col.collapsed,
html.sidebar-collapsed .app-side-col {
    width: var(--side-w, 260px);
}



.app-side {
    
    --side-item-margin-y: 2px;
    --side-item-gap: 10px;
    --side-item-pad-y: 8px;
    --side-item-fs: 14px;
    --side-ic-size: 36px;
    --side-ic-radius: 10px;
    --side-ic-fs: 16px;
    --side-sec-mt: 16px;
    --side-sec-mt-first: 26px;
    --side-sec-mb: 8px;
    --side-sub-pad-y: 8px;
    --side-sub-pad-l: 60px;
    --side-sub-fs: 13px;

    
    --side-grp-dur: .32s;
    --side-grp-ease: cubic-bezier(.4, 0, .2, 1);

    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 260px;             
    background: var(--color-bg-sidebar);
    border-right: 1px solid var(--color-sidebar-border);
    
    padding: 84px 0 12px;
    overflow-y: auto;
    overflow-x: hidden;
    
    scrollbar-gutter: stable;
    display: none;
    flex-direction: column;
    z-index: 100;
    transform: translateX(0);
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}


.app-side-col.collapsed .app-side,
html.sidebar-collapsed .app-side-col .app-side {
    transform: translateX(-100%);
}


.app-side::-webkit-scrollbar { width: 6px; }
.app-side::-webkit-scrollbar-track { background: transparent; }
.app-side::-webkit-scrollbar-thumb { 
    background: var(--color-border-strong); 
    border-radius: 3px; 
}
.app-side::-webkit-scrollbar-thumb:hover { background: var(--color-text-dim); }


.app-side > .app-side-section-title,
.app-side > .app-side-item,
.app-side > .app-side-group { flex-shrink: 0; }



.app-side-group { display: block; margin: 0; }

.app-side-section-title {
    margin: var(--side-sec-mt) 24px var(--side-sec-mb);
    padding: 0;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-sidebar-text-dim);
    opacity: 1;
    
    transition: margin var(--side-grp-dur) var(--side-grp-ease);
}
.app-side-section-title:first-of-type { margin-top: var(--side-sec-mt-first); }



.app-side-item {
    display: flex;
    align-items: center;
    gap: var(--side-item-gap);
    padding: var(--side-item-pad-y) 16px;
    border-radius: var(--radius-sm);
    font-size: var(--side-item-fs);
    font-weight: 500;
    margin: var(--side-item-margin-y) 12px;
    color: var(--color-sidebar-text);
    text-decoration: none;
    
    transition:
        background-color .2s ease,
        color .2s ease,
        padding var(--side-grp-dur) var(--side-grp-ease),
        margin var(--side-grp-dur) var(--side-grp-ease);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}


.app-side-item:hover,
.app-side-item.active:hover {
    background: transparent;
    color: var(--color-text-title);
    font-weight: 500;
    transform: none;
}
[data-theme="dark"] .app-side-item:hover,
[data-theme="dark"] .app-side-item.active:hover {
    color: var(--color-accent);
}


.app-side-item.active {
    background: transparent;
    color: var(--color-text-title);
    font-weight: 500;
}
[data-theme="dark"] .app-side-item.active {
    color: var(--color-accent);
}



.app-side-item .ic {
    width: var(--side-ic-size);
    height: var(--side-ic-size);
    border-radius: var(--side-ic-radius);
    background: var(--color-sidebar-hover);
    font-size: var(--side-ic-fs);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, color 0.2s ease;
    flex-shrink: 0;
}

.app-side-item:hover .ic,
.app-side-item.active:hover .ic {
    background: var(--color-sidebar-hover);
    color: var(--color-text-title);
    transform: none;
}
[data-theme="dark"] .app-side-item:hover .ic,
[data-theme="dark"] .app-side-item.active:hover .ic {
    color: var(--color-accent);
}

.app-side-item.active .ic {
    background: var(--color-sidebar-hover);
    color: var(--color-text-title);
    box-shadow: none;
}
[data-theme="dark"] .app-side-item.active .ic {
    color: var(--color-accent);
}



.app-side-item-text {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}



.app-side-caret {
    font-size: 12px;
    opacity: 0.5;
    margin-left: auto;
    transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.2s ease;
    flex-shrink: 0;
    color: var(--color-text-dim);
}

.app-side-item:hover .app-side-caret {
    opacity: 1;
    color: var(--color-accent);
}


.app-side-group.expanded > .app-side-toggle-item .app-side-caret {
    transform: rotate(90deg);
}

.app-side-toggle-item { cursor: pointer; }



.app-side-children {
    
    margin: 0 24px;
    padding: 0;
    border-left: none;
    
    display: grid;
    grid-template-rows: 0fr;
    overflow: hidden;
    
    transition: grid-template-rows var(--side-grp-dur) var(--side-grp-ease);
}


.app-side-group.expanded > .app-side-children {
    grid-template-rows: 1fr;
}


.app-side-children-inner {
    min-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: visibility 0s linear var(--side-grp-dur);
}
.app-side-group.expanded > .app-side-children .app-side-children-inner {
    visibility: visible;
    transition-delay: 0s;
}

.app-side-subitem {
    display: flex;
    align-items: center;
    gap: 8px;
    
    padding: var(--side-sub-pad-y) 14px var(--side-sub-pad-y) var(--side-sub-pad-l);
    border-radius: var(--radius-sm);
    font-size: var(--side-sub-fs);
    margin: 1px 0;            
    color: var(--color-sidebar-text);
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, opacity 0.2s ease;
    cursor: pointer;
    opacity: 0.85;
}

.app-side-subitem:hover {
    background: var(--color-sidebar-hover);
    color: var(--color-accent);
    opacity: 1;
}

.app-side-subitem.active {
    background: var(--color-sidebar-active-bg);
    color: var(--color-sidebar-active-text);
    font-weight: 500;
    opacity: 1;
}




.app-side-toggle-btn {
    position: fixed;
    top: 0;
    left: 260px;
    width: 22px;
    height: 100vh;
    background: transparent;
    border: none;
    border-radius: 0;
    cursor: pointer;
    z-index: 101;
    display: none;
    align-items: center;
    justify-content: center;
    color: #2196F3; 
    font-size: 18px;
    padding: 0;
    margin: 0;
    box-shadow: none;
    outline: none;            
}


.app-side-toggle-btn:focus,
.app-side-toggle-btn:focus-visible {
    outline: none;
}

.app-side-toggle-btn:hover {
    background: rgba(33, 150, 243, 0.08); 
    color: #1565C0; 
    width: 22px;
    border-radius: 0;
    padding: 0;
    margin: 0;
    box-shadow: none;
}


.app-side-toggle-icon {
    width: 22px;
    height: 80px;
    background: transparent;
    border-radius: 0 2px 2px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    letter-spacing: 2px;
    line-height: 1;
}


.app-side-toggle-btn:hover .app-side-toggle-icon {
    background: rgba(33, 150, 243, 0.2); 
}


.app-side-col.collapsed .app-side-toggle-btn,
html.sidebar-collapsed .app-side-col .app-side-toggle-btn {
    left: 0;
    border-radius: 0 10px 10px 0;
}








.app-drawer-mask { position: fixed; inset: 0; background: var(--overlay); z-index: 1500; opacity: 0; visibility: hidden; transition: opacity .25s ease; }
.app-drawer-mask.open { opacity: 1; visibility: visible; }
.app-drawer {
    position: fixed; top: 0; left: 0; bottom: 0; width: 280px; max-width: 82vw;
    background: var(--color-bg-sidebar); border-right: 1px solid var(--color-sidebar-border);
    z-index: 1600; transform: translateX(-100%); transition: transform .28s ease;
    display: none; flex-direction: column; padding: 12px 0 24px; overflow-y: auto;
}
.app-drawer.open { transform: translateX(0); }
.app-drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; border-bottom: 1px solid var(--color-sidebar-border); }
.app-drawer-title { font-size: 16px; font-weight: 700; color: var(--color-text-title); }
.app-drawer-close { border: none; background: transparent; color: var(--color-sidebar-text-dim); font-size: 22px; line-height: 1; cursor: pointer; padding: 0 6px; }
.app-drawer-body { padding: 12px 16px; flex: 1; }
.app-drawer-section { display: flex; flex-direction: column; gap: 2px; margin-top: 8px; }
.app-drawer-link { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: var(--radius-sm); color: var(--color-sidebar-text); text-decoration: none; font-size: 15px; transition: all .2s; }
.app-drawer-link:hover { background: var(--color-sidebar-hover); color: var(--color-accent); }

.app-drawer-link.active { background: var(--color-sidebar-hover); color: var(--color-accent); font-weight: 600; }
.app-drawer-reward { padding: 16px; }




.app-side-music {
    margin-top: auto;          
    flex-shrink: 0;
    padding: 8px 10px 10px;
    border-top: 1px solid var(--color-sidebar-border);
}

.app-side-music-status {
    margin-top: 6px;
    font-size: 11px;
    line-height: 1.4;
    text-align: center;
    color: var(--color-sidebar-text-dim);
}
.app-side-music-status:empty { display: none; }
.app-side-music[data-state="error"] .app-side-music-status { color: var(--color-danger); }


.mp-loading {
    padding: 30px 0;
    text-align: center;
    font-size: 12px;
    color: var(--color-sidebar-text-dim);
}
.mp-loading:empty { display: none; }
.app-side-music[data-state="loading"] .mp { display: none; }
.app-side-music:not([data-state="loading"]) .mp-loading { display: none; }



.mp {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);   
    align-items: start;
    column-gap: 8px;
    row-gap: 6px;
}
.mp-col {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;               
}


.mp-cover {
    position: relative;
    width: 64px;
    height: 64px;
    flex: 0 0 64px;
    align-self: flex-start;
    border-radius: var(--radius-sm);
    background: var(--color-sidebar-hover);
    background-size: cover;
    background-position: center;
    
    background-image: none;
}
.mp-cover-play {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 0;
    border: 0;
    border-radius: var(--radius-sm);
    
    background: rgba(0, 0, 0, .32);
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    opacity: 0;
    transition: opacity .15s ease;
}

.mp:hover .mp-cover-play,
.mp-cover-play:focus-visible { opacity: 1; }
.mp-cover-play:hover { background: rgba(0, 0, 0, .45); }
.mp-cover-play:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; }



.mp-name,
.mp-artist {
    overflow: hidden;
    white-space: nowrap;
}
.mp-name {
    font-size: 11.5px;
    line-height: 1.35;
    color: var(--color-sidebar-text);
}
.mp-artist {
    font-size: 10px;
    line-height: 1.35;
    color: var(--color-sidebar-text-dim);
}

.mp-artist.is-empty { display: none; }

.mp-name-tx,
.mp-artist-tx {
    display: inline-block;
    white-space: nowrap;
    will-change: transform;
}

.mp-name.is-overflow .mp-name-tx,
.mp-artist.is-overflow .mp-artist-tx {
    
    animation: mp-marquee var(--mp-marquee-dur, 8s) linear infinite;
}

.mp-name:hover .mp-name-tx,
.mp-name:focus-within .mp-name-tx,
.mp-artist:hover .mp-artist-tx,
.mp-artist:focus-within .mp-artist-tx { animation-play-state: paused; }

@media (prefers-reduced-motion: reduce) {
    .mp-name.is-overflow .mp-name-tx,
    .mp-artist.is-overflow .mp-artist-tx { animation: none; }
}

@keyframes mp-marquee {
    0%, 8%             { transform: translateX(0); }
    50%, 58%           { transform: translateX(calc(var(--mp-marquee-shift, 0px) * -1)); }
    100%               { transform: translateX(0); }
}


.mp-bar {
    position: relative;
    width: 100%;
    height: 3px;
    margin-top: 1px;
    border-radius: 2px;
    background: var(--color-sidebar-hover);
    cursor: pointer;
    touch-action: none;         
}
.mp-bar-loaded,
.mp-bar-played {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    border-radius: 2px;
    width: 0;
}
.mp-bar-loaded { background: var(--color-sidebar-hover); filter: brightness(.85); }
.mp-bar-played { background: var(--color-accent); }
.mp-bar-thumb {
    position: absolute;
    top: 50%;
    left: 0;
    width: 10px;
    height: 10px;
    margin: -5px 0 0 -5px;
    border-radius: 50%;
    background: var(--color-accent);
    opacity: 0;                 
    transition: opacity .15s ease;
    pointer-events: none;
}
.mp-bar:hover .mp-bar-thumb,
.mp-bar:focus-visible .mp-bar-thumb,
.mp-bar.is-dragging .mp-bar-thumb { opacity: 1; }
.mp-bar:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }


.mp-time {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    line-height: 1;
    color: var(--color-sidebar-text-dim);
    font-variant-numeric: tabular-nums;  
}


.mp-ctl {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1px;
    margin-top: 0;
}

.mp-vol-wrap {
    position: relative;
    display: flex;
    flex: 0 0 auto;
}
.mp-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
    padding: 0;
    border: 0;
    border-radius: var(--radius-sm);         
    background: transparent;
    color: var(--color-sidebar-text);
    font-size: 13px;
    cursor: pointer;
    transition: background .15s ease, color .15s ease;
}
.mp-btn:hover { background: var(--color-sidebar-hover); color: var(--color-accent); }
.mp-btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 1px; }
.mp-btn[disabled] { opacity: .4; cursor: not-allowed; }
.mp-btn[disabled]:hover { background: transparent; color: var(--color-sidebar-text); }


.mp-play-btn.mp-btn { color: var(--color-accent); }


.mp-vol-btn { width: 20px; height: 20px; font-size: 14px; }


.mp-i-pause.is-hidden,
.mp-i-play.is-hidden,
.mp-i-mute.is-hidden,
.mp-i-vol.is-hidden { display: none; }


.mp-vol-bar {
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    width: 8px;
    height: 0;
    border-radius: 4px;
    background: var(--color-sidebar-hover);
    cursor: pointer;
    touch-action: none;
    overflow: hidden;
    transition: height .18s ease;
}
.mp-vol-bar.is-open { height: 56px; }

.mp-vol-bar.is-dragging { transition: none; }
.mp-vol-fill {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 0;                 
    border-radius: 4px;
    background: var(--color-accent);
}
.mp-vol-bar:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }


.mp-list-btn { margin-left: auto; flex: 0 0 auto; }


.mp-list {
    grid-column: 1 / -1;       
    max-height: 200px;          
    overflow-y: auto;
    overscroll-behavior: contain;   
    border-top: 1px solid var(--color-sidebar-border);
}
.mp-list[hidden] { display: none; }
.mp-list[hidden] { display: none; }
.mp-list-ol {
    margin: 0;
    padding: 4px 0;
    list-style: none;
}
.mp-list-li {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 6px;
    font-size: 11.5px;
    line-height: 1.3;
    color: var(--color-sidebar-text);
    cursor: pointer;
    border-radius: var(--radius-sm);
}
.mp-list-li:hover { background: var(--color-sidebar-hover); }
.mp-list-li.is-current { color: var(--color-accent); }
.mp-list-idx {
    flex: 0 0 auto;
    width: 16px;
    text-align: right;
    color: var(--color-sidebar-text-dim);
    font-variant-numeric: tabular-nums;
}
.mp-list-li.is-current .mp-list-idx { color: var(--color-accent); }
.mp-list-title {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.mp-list-dur {
    flex: 0 0 auto;
    color: var(--color-sidebar-text-dim);
    font-variant-numeric: tabular-nums;
}



html.sidebar-collapsed .app-side-music .mp,
html.sidebar-collapsed .app-side-music .mp-loading,
html.sidebar-collapsed .app-side-music-status { display: none; }
html.sidebar-collapsed .app-side-music { padding-bottom: 12px; }

.auth-fullscreen .app-side-music,
.member-center .app-side-music { display: none; }