@property --md-sys-color-primary { syntax: '<color>'; inherits: true; initial-value: #8C0082; }
@property --md-sys-color-background { syntax: '<color>'; inherits: true; initial-value: #FFF7FA; }
@property --md-sys-color-surface { syntax: '<color>'; inherits: true; initial-value: #FCEDF2; }
@property --md-sys-color-surface-variant { syntax: '<color>'; inherits: true; initial-value: #F4DDDF; }
@property --md-sys-color-on-surface-variant { syntax: '<color>'; inherits: true; initial-value: #524345; }
@property --md-sys-color-primary-container { syntax: '<color>'; inherits: true; initial-value: #FFD7F3; }
@property --md-sys-color-on-primary-container { syntax: '<color>'; inherits: true; initial-value: #390035; }
@property --md-sys-color-secondary-container { syntax: '<color>'; inherits: true; initial-value: #F9DEDC; }
@property --md-sys-color-on-secondary-container { syntax: '<color>'; inherits: true; initial-value: #412D2F; }
@property --md-sys-color-on-background { syntax: '<color>'; inherits: true; initial-value: #201A1B; }

:root {
    --md-sys-color-primary: #8C0082;
    --md-sys-color-background: #FFF7FA;
    --md-sys-color-on-background: #201A1B;
    --md-sys-color-surface: #FCEDF2;
    --md-sys-color-surface-variant: #F4DDDF;
    --md-sys-color-on-surface-variant: #524345;
    --md-sys-color-primary-container: #FFD7F3;
    --md-sys-color-on-primary-container: #390035;
    --md-sys-color-secondary-container: #F9DEDC;
    --md-sys-color-on-secondary-container: #412D2F;
    --md-sys-color-error: #B3261E;
    
    --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-xl: 2rem;
    --radius-lg: 1.5rem;
    --radius-md: 1rem;
    --radius-full: 9999px;
    
    --elevation-2: 0 4px 6px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.1);
    --elevation-4: 0 14px 28px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.05);

    transition: 
        --md-sys-color-primary 0.4s ease-out,
        --md-sys-color-background 0.4s ease-out,
        --md-sys-color-on-background 0.4s ease-out,
        --md-sys-color-surface 0.4s ease-out,
        --md-sys-color-surface-variant 0.4s ease-out,
        --md-sys-color-on-surface-variant 0.4s ease-out,
        --md-sys-color-primary-container 0.4s ease-out,
        --md-sys-color-on-primary-container 0.4s ease-out,
        --md-sys-color-secondary-container 0.4s ease-out,
        --md-sys-color-on-secondary-container 0.4s ease-out;
}

html { font-size: clamp(12px, 0.8vw + 0.5vh + 6px, 18px); }
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

.no-resize-transition * { transition: none !important; }

@keyframes viewFadeIn {
    0% { opacity: 0; transform: translateY(1.5rem); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes queueItemIn {
    0% { opacity: 0; transform: translateX(-1rem) scale(0.98); }
    100% { opacity: 1; transform: translateX(0) scale(1); }
}

.animate-queue-in {
    will-change: opacity, transform;
    animation: queueItemIn 0.25s cubic-bezier(0.2, 0, 0, 1) forwards;
}

@keyframes queueItemOut {
    0% { opacity: 1; transform: translateX(0) scale(1); }
    100% { opacity: 0; transform: translateX(1rem) scale(0.98); }
}

.animate-queue-out {
    will-change: opacity, transform;
    animation: queueItemOut 0.25s cubic-bezier(0.2, 0, 0, 1) forwards;
}

#ambient-bg {
    position: fixed; top: -5%; left: -5%; width: 110vw; height: 110vh;
    z-index: -1; filter: blur(80px); opacity: 0.25; 
    background-size: cover; background-position: center; 
    transition: background-image 2s ease-in-out, opacity 2s; pointer-events: none;
}

body, .panel, .bottom-bar, .action-btn, .search-box, .m3-tabs .tab, .back-btn, .ctrl-btn, .track-item, .icon-fallback, .bubble-btn {
    transition: background-color 0.4s ease-out, color 0.4s ease-out, border-color 0.4s ease-out, transform 0.1s cubic-bezier(0.2, 0, 0, 1);
}

button:active, .action-btn:active, .ctrl-btn:active, .tab:active, .track-main-click:active, .icon-btn-ghost:active {
    transform: scale(0.96) !important;
}

body { 
    font-family: var(--font-family); 
    background-color: var(--md-sys-color-background); 
    color: var(--md-sys-color-on-background); 
    height: 100vh; 
    overflow: hidden; 
    margin: 0; 
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.fade-out { opacity: 0 !important; }

#login-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background-color: var(--md-sys-color-background); display: flex; justify-content: center; align-items: center; z-index: 1000; padding: 1.25rem; }
#login-card { background-color: var(--md-sys-color-surface); border-radius: var(--radius-xl); padding: 2rem; width: 100%; max-width: 400px; box-shadow: var(--elevation-4); }
#login-card h2 { font-size: 1.5rem; margin-bottom: 1.5rem; text-align: center; }
.input-group { display: flex; flex-direction: column; margin-bottom: 1rem; }
.input-group label { font-size: 0.875rem; margin-bottom: 0.5rem; font-weight: 500; }
.input-group input { padding: 1rem; border-radius: var(--radius-lg); border: none; background-color: var(--md-sys-color-surface-variant); color: var(--md-sys-color-on-background); font-size: 1rem; outline: none; }
.input-group input:focus { box-shadow: 0 0 0 2px var(--md-sys-color-primary); }

.checkbox-group { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; }
.checkbox-group input { width: 1.125rem; height: 1.125rem; accent-color: var(--md-sys-color-primary); cursor: pointer; }
.checkbox-group label { font-size: 0.9rem; font-weight: 500; cursor: pointer; }

button.m3-btn { width: 100%; padding: 1rem; border-radius: var(--radius-full); border: none; background-color: var(--md-sys-color-on-primary-container); color: var(--md-sys-color-primary-container); font-size: 1rem; font-weight: 600; cursor: pointer; transition: opacity 0.2s, transform 0.1s; position: relative; overflow: hidden; }
button.m3-btn:hover { opacity: 0.9; }
#login-error { background-color: #F9DEDC; color: var(--md-sys-color-error); padding: 0.75rem; border-radius: 0.75rem; font-size: 0.85rem; margin-top: 1rem; text-align: center; display: none; }

#main-app { 
    display: none; 
    grid-template-rows: 1fr auto; 
    grid-template-columns: clamp(20rem, 25vw, 26rem) minmax(300px, 1fr) clamp(22rem, 32vw, 34rem); 
    gap: 1rem; padding: 1rem; height: 100vh; 
    transition: grid-template-columns 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.panel { background-color: var(--md-sys-color-surface); border-radius: var(--radius-xl); display: flex; flex-direction: column; overflow: hidden; box-shadow: var(--elevation-2); position: relative; transition: opacity 0.4s, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); will-change: transform, opacity; }

.sticky-header { padding: 1.5rem 1.5rem 0 1.5rem; flex-shrink: 0; z-index: 10; }

/* Hiding scrollbars completely natively */
.scrollable-content { 
    padding: 1rem 1.5rem 1.5rem 1.5rem; 
    flex-grow: 1; 
    overflow-y: auto; 
    overflow-x: hidden;
    min-height: 0;
    transform: translate3d(0,0,0);
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}
.scrollable-content::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.panel-title-wrapper { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; flex-wrap: wrap; gap: 0.5rem; }
.panel-title { font-size: 1.5rem; font-weight: 700; display: flex; align-items: center; gap: 0.5rem; margin: 0; }
.header-actions { display: flex; gap: 0.5rem; align-items: center; }

.search-container { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1rem; }
.search-box { display: flex; background: var(--md-sys-color-surface-variant); border-radius: var(--radius-full); padding: 0.25rem 1rem; align-items: center; gap: 0.5rem; }
.search-box input { flex: 1; border: none; background: transparent; padding: 0.75rem 0; font-size: 1rem; color: var(--md-sys-color-on-background); outline: none; }
.m3-tabs { display: flex; border-bottom: 1px solid var(--md-sys-color-surface-variant); }
.m3-tabs .tab { flex: 1; background: transparent; border: none; padding: 0.75rem 0; font-weight: 600; font-size: 0.9rem; color: var(--md-sys-color-on-surface-variant); cursor: pointer; position: relative; overflow: hidden; }
.m3-tabs .tab.active { color: var(--md-sys-color-primary); }
.m3-tabs .tab.active::after { content: ''; position: absolute; bottom: -1px; left: 0; right: 0; height: 3px; background: var(--md-sys-color-primary); border-radius: 3px 3px 0 0; }

#search-view, #detail-view, #lyrics-view { 
    position: relative;
    overflow: hidden;
    display: flex; flex-direction: column; height: 100%;
    animation: viewFadeIn 0.4s cubic-bezier(0.2, 0, 0, 1) forwards;
    will-change: transform, opacity;
}
@keyframes viewFadeOut {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(1.5rem); }
}
#detail-view, #lyrics-view { display: none; }

.back-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.5rem; font-weight: 700; font-size: 1.2rem; justify-content: space-between; }
.back-btn { background: var(--md-sys-color-surface-variant); color: var(--md-sys-color-on-surface-variant); border: none; width: 2.5rem; height: 2.5rem; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; cursor: pointer; position: relative; overflow: hidden; }
.back-btn:hover { background: var(--md-sys-color-secondary-container); }

.lyric-line { 
    opacity: 0.4; 
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.4s, color 0.4s; 
    padding: 0.6rem 1rem; 
    cursor: pointer; 
    border-radius: 1rem; 
    transform-origin: center; 
    font-weight: 700; 
    display: flex; 
    flex-direction: column; 
    gap: 0.25rem; 
    will-change: transform, opacity, color;
    transform: translateZ(0); 
    backface-visibility: hidden;
    position: relative; overflow: hidden;
}
.lyric-line:hover { background: var(--md-sys-color-surface-variant); opacity: 0.8; }
.lyric-line.active { 
    opacity: 1; 
    color: var(--md-sys-color-primary); 
    transform: scale(1.1) translateZ(0); 
}

.lyric-orig { font-size: 1.25rem; pointer-events: none; }
.lyric-trans { font-size: 0.95rem; font-weight: 500; opacity: 0.7; color: var(--md-sys-color-on-surface-variant); transition: opacity 0.4s ease; pointer-events: none; }
.lyric-line.active .lyric-trans { opacity: 0.9; }

@keyframes heartPop {
    0% { transform: scale(1); }
    25% { transform: scale(1.4) rotate(-8deg); }
    50% { transform: scale(0.9) rotate(8deg); }
    75% { transform: scale(1.15) rotate(-3deg); }
    100% { transform: scale(1) rotate(0); }
}

.icon-btn-ghost { background: transparent; border: none; color: var(--md-sys-color-on-background); opacity: 0.6; display: flex; align-items: center; justify-content: center; width: 3.5rem; height: 3.5rem; border-radius: var(--radius-full); cursor: pointer; transition: all 0.2s; position: relative; overflow: hidden; }
.icon-btn-ghost:hover { background: var(--md-sys-color-surface-variant); opacity: 1; }
.icon-btn-ghost.active { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); opacity: 1; }

.icon-btn-ghost.favorited { color: var(--md-sys-color-error); opacity: 1; }
.icon-btn-ghost.favorited .material-symbols-rounded { 
    font-variation-settings: 'FILL' 1; 
    animation: heartPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.track-list { display: flex; flex-direction: column; gap: 0.5rem; }
.track-item { display: flex; align-items: center; padding: 0.5rem; border-radius: var(--radius-md); gap: 0.5rem; transition: background-color 0.2s, opacity 0.2s; user-select: none; -webkit-user-select: none; }
.track-item:hover { background: var(--md-sys-color-surface-variant); }

.drag-handle { 
    cursor: grab; display: flex; align-items: center; justify-content: center;
    color: var(--md-sys-color-on-background); opacity: 0.5; 
    padding: 0.25rem 0.25rem 0.25rem 0.25rem; transition: opacity 0.2s, transform 0.2s; 
    user-select: none; -webkit-user-select: none; touch-action: none;
}
.track-item:hover .drag-handle { opacity: 1; }
.drag-handle:active { cursor: grabbing; transform: scale(0.9); }

.sortable-ghost { opacity: 0.2 !important; background: var(--md-sys-color-surface-variant) !important; }
.sortable-drag, .sortable-fallback { 
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.2) !important; 
    background: var(--md-sys-color-surface) !important; 
    cursor: grabbing !important; z-index: 9999 !important;
    opacity: 1 !important;
}

.track-main-click { display: flex; align-items: center; flex: 1; gap: 0.75rem; cursor: pointer; border-radius: var(--radius-md); transition: transform 0.15s; position: relative; overflow: hidden; }

.track-info-small { flex: 1; overflow: hidden; pointer-events: none; }
.track-info-small .title { font-weight: 600; font-size: 0.95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-info-small .artist { font-size: 0.8rem; opacity: 0.8; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.action-group { display: flex; gap: 0.375rem; }
.action-btn { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); border: none; width: 2.75rem; height: 2.75rem; border-radius: var(--radius-full); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: transform 0.1s, background-color 0.4s, color 0.4s; flex-shrink: 0; position: relative; overflow: hidden; }
.action-btn:hover { filter: brightness(0.95); }
.action-btn.remove { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }

.image-wrapper { position: relative; width: 3rem; height: 3rem; border-radius: 0.5rem; background: var(--md-sys-color-primary-container); display: flex; justify-content: center; align-items: center; overflow: hidden; flex-shrink: 0; pointer-events: none; }

.center-stage { 
    padding: clamp(1rem, 2vh, 1.5rem); 
    background-color: transparent; 
    box-shadow: none; 
    align-items: center; 
    justify-content: center; 
    overflow: hidden; 
}

.huge-art-wrapper { 
    position: relative; 
    width: 100%; 
    max-width: 32rem; 
    max-height: calc(100vh - 24rem); 
    aspect-ratio: 1; 
    margin-bottom: clamp(1rem, 3vh, 2.5rem); 
    perspective: 1500px;
    cursor: pointer;
    z-index: 10;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 1;
    min-height: 0;
}

.lyrics-mobile-overlay {
    width: 100%; 
    height: auto !important;
    max-width: 32rem; 
    max-height: calc(100vh - 24rem); 
    aspect-ratio: 1; 
    margin-bottom: clamp(1rem, 3vh, 2.5rem); 
    flex-shrink: 1;
    min-height: 0;
    border-radius: var(--radius-xl);
    background: var(--md-sys-color-surface-variant);
    box-shadow: var(--elevation-2);
    overflow: hidden;
}

.huge-art-wrapper:hover {
    transform: translateY(-8px);
}

.art-flip-inner {
    position: relative; width: 100%; height: 100%;
    transition: transform 0.7s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
    transform-style: preserve-3d;
    border-radius: var(--radius-xl);
    box-shadow: var(--elevation-2);
}

.huge-art-wrapper:hover .art-flip-inner {
    box-shadow: var(--elevation-4);
}

.art-flip-inner.flipped { 
    transform: rotateY(180deg); 
}

.art-front, .art-back {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: background-color 0.4s ease-out;
}

.art-front *, .art-back * {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.art-front {
    background: var(--md-sys-color-secondary-container);
    display: flex; justify-content: center; align-items: center;
    transform: rotateY(0deg) translateZ(1px); 
}

.art-back {
    background: var(--md-sys-color-surface-variant); 
    color: var(--md-sys-color-on-surface-variant);
    transform: rotateY(180deg) translateZ(1px); 
    padding: 2.5rem;
    display: flex; flex-direction: column; gap: 1rem;
    overflow-y: auto; text-align: left;
    
    scrollbar-width: none; 
    -ms-overflow-style: none; 
}

.art-back::-webkit-scrollbar { display: none; }

#art-back-content {
    transition: opacity 0.3s ease;
    opacity: 1;
}

.bio-text { 
    font-size: 0.95rem; opacity: 0.85; line-height: 1.5; 
}

.bubble-container { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.bubble-btn { 
    background: var(--md-sys-color-primary-container); 
    color: var(--md-sys-color-on-primary-container); 
    border: none; padding: 0.5rem 1rem; border-radius: var(--radius-full); 
    font-size: 0.85rem; font-weight: 600; cursor: pointer; 
    transition: transform 0.15s, filter 0.2s, background-color 0.4s ease-out, color 0.4s ease-out; 
    display: flex; align-items: center;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; 
}

.bubble-btn:hover { filter: brightness(0.9); transform: scale(0.96); }

.spinner { position: absolute; width: 1.25rem; height: 1.25rem; border: 3px solid var(--md-sys-color-surface-variant); border-top-color: var(--md-sys-color-primary); border-radius: 50%; animation: spin 1s linear infinite; }
.huge-spinner { width: 3rem; height: 3rem; border-width: 4px; }
@keyframes spin { to { transform: rotate(360deg); } }

.track-img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.25s ease-out; }
.track-img.loaded { opacity: 1; }
.icon-fallback { position: absolute; top: 0; left: 0; width: 100%; height: 100%; color: var(--md-sys-color-primary); display: flex; align-items: center; justify-content: center; }

.now-playing-info { width: 100%; text-align: center; display: flex; flex-direction: column; align-items: center; flex-shrink: 0; }

.now-playing-info .title, .now-playing-info .artist, .now-playing-info .album {
    transition: font-size 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.now-playing-info .title { font-size: 2.5rem; font-weight: 800; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
.now-playing-info .artist { font-size: 1.25rem; opacity: 0.8; margin-bottom: 0.25rem; }
.now-playing-info .album { font-size: 1rem; opacity: 0.6; }

.now-playing-actions {
    display: flex; justify-content: center; align-items: center; gap: 2rem;
    width: 100%; max-width: 26rem; margin-top: 1.5rem;
}

.bottom-bar { grid-column: 1 / -1; background: var(--md-sys-color-on-primary-container); color: var(--md-sys-color-primary-container); border-radius: var(--radius-xl); padding: 1rem 2rem; display: flex; align-items: center; justify-content: space-between; box-shadow: var(--elevation-4); gap: 1.5rem; z-index: 100; position: relative; }
.player-controls { display: flex; align-items: center; gap: 1rem; }
.ctrl-btn { background: none; border: none; color: var(--md-sys-color-primary-container); cursor: pointer; padding: 0.75rem; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; transition: color 0.4s ease-out; position: relative; overflow: hidden; }
.ctrl-btn.play-pause { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); padding: 1rem; transition: background-color 0.4s ease-out, color 0.4s ease-out; }

@media (hover: hover) {
    .ctrl-btn:hover { background: rgba(255, 255, 255, 0.15); }
    .ctrl-btn.play-pause:hover { filter: brightness(0.9); }
    .ctrl-btn:active { background: rgba(255, 255, 255, 0.25); }
    .ctrl-btn.play-pause:active { filter: brightness(0.8); }
}
.ctrl-btn.play-pause .material-symbols-rounded { font-size: 2.25rem; pointer-events: none; }
.ctrl-btn.active { color: #FFB4E6; background: rgba(255, 180, 230, 0.2); }
.ctrl-btn .material-symbols-rounded { pointer-events: none; }

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: rippleAnim 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: currentColor;
    opacity: 0.15;
    pointer-events: none;
}
@keyframes rippleAnim {
    to { transform: scale(4); opacity: 0; }
}

.progress-wrapper { flex: 1; display: flex; align-items: center; gap: 1rem; font-variant-numeric: tabular-nums; font-size: 0.9rem; max-width: 45rem; }
.progress-bar-container { position: relative; flex: 1; height: 2rem; display: flex; align-items: center; }
.progress-bar-bg { width: 100%; height: 0.75rem; background: rgba(255, 255, 255, 0.2); border-radius: var(--radius-full); position: relative; pointer-events: none; }

.progress-bar-fill { 
    height: 100%; background-color: var(--md-sys-color-primary-container); width: 0%; border-radius: var(--radius-full); position: relative; 
    transition: background-color 0.4s ease-out; 
}

.progress-bar-fill::before { 
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 12'%3E%3Cpath d='M0 6 Q 15 0, 30 6 T 60 6' fill='none' stroke='white' stroke-width='3' stroke-linecap='round'/%3E%3Cpath d='M0 6 Q 15 12, 30 6 T 60 6' fill='none' stroke='rgba(255,255,255,0.5)' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E");
    background-size: 60px 100%; animation: wave-slide 1s linear infinite; 
    opacity: 0; transition: opacity 0.6s ease; pointer-events: none;
    clip-path: inset(0 0 0 0 round var(--radius-full)); 
}

.progress-orb {
    position: absolute; top: -0.375rem; right: -0.75rem; width: 1.5rem; height: 1.5rem;
    background-color: var(--md-sys-color-primary-container);
    border-radius: 50%; box-shadow: 0 2px 8px rgba(0,0,0,0.3); pointer-events: none;
    transition: border-radius 0.6s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.4s ease-out;
    animation: spin-only 3s linear infinite;
}

.is-playing .progress-orb { border-radius: 40% 60% 60% 40% / 50% 40% 60% 50%; }
.is-playing::before { opacity: 1; }

@keyframes wave-slide { from { background-position: 0 0; } to { background-position: -60px 0; } }
@keyframes spin-only { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

#seek-slider {
    position: absolute; width: 100%; height: 100%; top: 0; left: 0; margin: 0;
    opacity: 0; cursor: pointer; -webkit-appearance: none; z-index: 10;
}
#seek-slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 1.5rem; height: 1.5rem; border-radius: 50%; cursor: grab; }
#seek-slider:active::-webkit-slider-thumb { cursor: grabbing; }

.volume-wrapper { display: flex; align-items: center; gap: 0.25rem; min-width: 7.5rem; }
.volume-slider { -webkit-appearance: none; width: 6.25rem; height: 0.375rem; background: rgba(255, 255, 255, 0.2); border-radius: var(--radius-full); outline: none; }
.volume-slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 1rem; height: 1rem; border-radius: 50%; background: var(--md-sys-color-primary-container); cursor: pointer; }

.queue-banner {
    position: absolute; bottom: 1.5rem; left: 1.5rem; right: 1.5rem;
    background: var(--md-sys-color-on-primary-container); color: var(--md-sys-color-primary-container);
    padding: 1rem; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; gap: 0.5rem;
    cursor: pointer; font-weight: 700; box-shadow: var(--elevation-4);
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    opacity: 0; pointer-events: none; transform: translateY(2rem) scale(0.95); z-index: 20;
}
.queue-banner:hover { filter: brightness(1.2); }
.queue-banner.show { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }

.mobile-only-btn { display: none; }
#reduced-queue-toggle-btn { display: none !important; }

@media (max-width: 1200px) and (min-width: 851px) {
    #reduced-queue-toggle-btn { display: flex !important; }
    #main-app {
        grid-template-columns: minmax(300px, 1.5fr) minmax(300px, 1fr);
        grid-template-rows: 1fr 1fr auto;
        transition: grid-template-rows 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    .center-stage { grid-column: 1; grid-row: 1 / 3; }
    #discover-panel { grid-column: 2; grid-row: 1; }
    #queue-panel { 
        grid-column: 2; grid-row: 2; opacity: 1; transform: scale(1) translateY(0);
        transition: opacity 0.3s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), margin 0.4s ease, padding 0.4s ease, min-height 0.4s ease, visibility 0.4s; overflow: hidden;
    }
    #main-app.queue-hidden-reduced { grid-template-rows: 1fr 0fr auto; }
    #main-app.queue-hidden-reduced #queue-panel { 
        opacity: 0; visibility: hidden; pointer-events: none; transform: scale(0.95) translateY(-20px); min-height: 0; margin-top: -1rem; padding-top: 0; padding-bottom: 0; border: none;
    }
}

@media (min-width: 851px) {
    /* Floating FAB hidden on large screens anyway, but now entirely removed */
}

/* --- Settings Popover --- */
#settings-menu {
    border: 1px solid color-mix(in srgb, var(--md-sys-color-on-surface-variant) 20%, transparent);
    background: color-mix(in srgb, var(--md-sys-color-surface) 90%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    padding: 0.5rem;
    
    /* JS Positioning used instead of Anchor Positioning */
    position: absolute;
    margin: 0;
    
    flex-direction: column;
    gap: 0.25rem;
}
#settings-menu:is(:popover-open, .\:popover-open) {
    display: flex;
    animation: popoverFadeIn 0.2s cubic-bezier(0.2, 0, 0, 1) forwards;
}
@keyframes popoverFadeIn {
    0% { opacity: 0; transform: translateY(-0.5rem) scale(0.95); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}
#settings-menu::backdrop { background: transparent; }
.settings-item {
    display: flex; align-items: center; justify-content: center; gap: 0.75rem;
    padding: 0.75rem 1.25rem; border: none; background: transparent;
    color: var(--md-sys-color-on-background); font-size: 0.95rem; font-weight: 600;
    border-radius: var(--radius-md); cursor: pointer; transition: background 0.2s;
    white-space: nowrap; width: 100%;
}
.settings-item:hover { background: color-mix(in srgb, var(--md-sys-color-on-surface-variant) 10%, transparent); }
.settings-item .material-symbols-rounded { font-size: 1.25rem; color: var(--md-sys-color-primary); }

/* --- Dialogs --- */
#logout-dialog, #translation-dialog, #changelog-dialog {
    position: fixed; inset: 0; margin: auto;
    border: 1px solid color-mix(in srgb, var(--md-sys-color-on-surface-variant) 20%, transparent);
    background: color-mix(in srgb, var(--md-sys-color-surface) 95%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-xl); padding: 2rem 1.5rem; max-width: 90vw; width: 350px;
    box-shadow: var(--elevation-4); color: var(--md-sys-color-on-background); text-align: center;
    
    opacity: 0; transform: scale(0.95);
    transition-property: opacity, transform, display, overlay;
    transition-duration: 0.3s; transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
    transition-behavior: allow-discrete;
}
#logout-dialog[open], #translation-dialog[open], #changelog-dialog[open] {
    opacity: 1;
    transform: scale(1);
    @starting-style { opacity: 0; transform: scale(0.95); }
}
#logout-dialog::backdrop, #translation-dialog::backdrop, #changelog-dialog::backdrop {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: background 0.3s ease, backdrop-filter 0.3s ease;
}
#logout-dialog[open]::backdrop, #translation-dialog[open]::backdrop, #changelog-dialog[open]::backdrop {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    @starting-style { background: rgba(0, 0, 0, 0); backdrop-filter: blur(0px); -webkit-backdrop-filter: blur(0px); }
}
.dialog-content { display: flex; flex-direction: column; align-items: center; gap: 1rem; margin-bottom: 2rem; }
.dialog-icon { font-size: 3rem; color: var(--md-sys-color-primary); }
.dialog-content h3, .dialog-content p { margin: 0; }
.dialog-content p { font-size: 0.95rem; opacity: 0.8; }
.dialog-actions { display: flex; gap: 0.75rem; justify-content: center; }
.dialog-btn {
    padding: 0.75rem 1.5rem; border-radius: var(--radius-full); border: none; min-width: 100px;
    font-weight: 600; cursor: pointer; transition: opacity 0.2s, transform 0.1s;
}
.dialog-btn:active { transform: scale(0.95); }
.dialog-btn.secondary { background: var(--md-sys-color-surface-variant); color: var(--md-sys-color-on-surface-variant); }
.dialog-btn.primary { background: var(--md-sys-color-error); color: #FFF; }
.dialog-btn:hover { opacity: 0.9; }

@media (max-width: 850px) {
    #main-app { display: flex; flex-direction: column; height: 100dvh; padding: 0; gap: 0; }
    .desktop-lyrics-controls { display: none !important; }
    .panel { border-radius: 0; }
    .center-stage { flex: 1; display: flex; flex-direction: column; justify-content: center; padding: 1rem; }
    .huge-art-wrapper, .lyrics-mobile-overlay { margin-bottom: 1.5rem; max-width: 85vw; max-height: calc(100dvh - 20rem); width: 100%; aspect-ratio: 1; border-radius: var(--radius-xl); }
    .now-playing-info .title { font-size: 1.8rem; }
    .bottom-bar { border-radius: var(--radius-xl) var(--radius-xl) 0 0; flex-wrap: wrap; justify-content: center; gap: 0.25rem; padding: 1rem 1rem calc(0.5rem + env(safe-area-inset-bottom)) 1rem; }
    .player-controls { gap: 0.25rem; }
    .progress-wrapper { min-width: 100%; order: -1; margin-bottom: 0.25rem; }
    .volume-wrapper { display: none; }
    .mobile-only-btn { display: flex; }
    
    #discover-panel, #queue-panel {
        position: fixed; top: 25dvh; left: 0; right: 0; bottom: calc(14rem + env(safe-area-inset-bottom)); margin: 0.75rem; z-index: 90; box-shadow: var(--elevation-4); border-radius: var(--radius-xl);
        opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(3rem) scale(0.95); transform-origin: bottom center;
        transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease-out, visibility 0s 0.5s; 
    }
    
    #discover-panel.mobile-active, #queue-panel.mobile-active {
        opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0) scale(1);
        transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease-out, visibility 0s 0s; 
    }
}