:root {
    --bg-dark: #0a0a12;
    --primary: #6d28d9;
    --accent: #d8b4fe;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: #a1a1aa;
    --font-main: 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100vh;
}

#isolation-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 3rem;
    box-sizing: border-box;
}

.isolation-section {
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
    /* Ensure horizontal scroll of children doesn't leak */
}

#ai-loader.hidden-view {
    display: none;
}

/* Background Effects */
.background-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.4;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -100px;
    left: -100px;
    animation: float 10s infinite alternate;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: #c026d3;
    bottom: -50px;
    right: -50px;
    animation: float 12s infinite alternate-reverse;
}

@keyframes float {
    from {
        transform: translate(0, 0);
    }

    to {
        transform: translate(40px, 40px);
    }
}

/* Global Layout */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* View State Management */
.view {
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.hidden-view {
    display: none !important;
}

.active-view {
    display: block;
    opacity: 1;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Shared Components */
.glass-header,
.glass-panel {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

.glass-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    margin-bottom: 1.5rem;
    position: sticky;
    top: 1rem;
    z-index: 100;
}

.header-main {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-back {
    font-size: 0.9rem;
    background: rgba(255, 255, 255, 0.08);
    padding: 0.35rem 0.8rem !important;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.highlight {
    color: var(--accent);
}

.breadcrumbs {
    color: var(--text-muted);
    font-size: 0.9rem;
}

h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #a5b4fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

p {
    color: var(--text-muted);
    line-height: 1.6;
}

/* Track Info Display */
.track-info-inner {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 2rem;
    text-align: left;
}

.track-info-art {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    background-size: cover;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    flex-shrink: 0;
}

.track-info-text h2 {
    margin: 0;
    font-size: 2rem;
    line-height: 1.1;
}

.track-info-text p {
    margin: 0;
    opacity: 0.7;
    font-size: 1.2rem;
    margin-top: 0.5rem;
}

/* Section 1: Browser */
.hero-text {
    text-align: center;
    margin-bottom: 2rem;
}

.search-container {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 0.25rem;
}

.search-input-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.search-input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    padding: 1rem 1.5rem;
    padding-right: 50px;
    border-radius: 30px;
    width: 100%;
    color: #fff;
    font-size: 1.1rem;
    font-family: inherit;
    outline: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.search-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(109, 40, 217, 0.3);
}

.clear-search-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.5);
    font-size: 18px;
    width: 28px;
    height: 28px;
    border-radius: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    padding: 0;
    line-height: 1;
    backdrop-filter: blur(10px);
}

.clear-search-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent);
    color: rgba(255, 255, 255, 0.9);
    transform: translateY(-50%) scale(1.1);
}


.track-grid {
    display: grid;
    grid-template-columns: repeat(6, 200px);
    grid-auto-columns: 200px;
    grid-template-rows: repeat(2, auto);
    grid-auto-flow: column;
    gap: 1.5rem;

    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;

    /* Hide scrollbar but keep functionality */
    scrollbar-width: none;
    -ms-overflow-style: none;

    /* 2 rows: card height (~360px) * 2 + gap (1.5rem) */
    max-height: calc(360px * 2 + 1.5rem);
    padding-top: 6px;
    padding-bottom: 1rem;

    /* Pull grid closer to edge (2rem main padding - 1rem = 1rem gap) */
    margin-right: -1rem;
    margin-left: -1rem;

    /* Dynamic Mask for Fade Effect */
    mask-image: linear-gradient(to right, black 100%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, black 100%, transparent 100%);
    transition: -webkit-mask-image 0.3s ease, mask-image 0.3s ease;
}

.track-grid.can-scroll-left {
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 60px, black 100%, transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, black 60px, black 100%, transparent 100%);
}

.track-grid.can-scroll-right {
    -webkit-mask-image: linear-gradient(to right, black 0%, black calc(100% - 60px), transparent 100%);
    mask-image: linear-gradient(to right, black 0%, black calc(100% - 60px), transparent 100%);
}

.track-grid.can-scroll-left.can-scroll-right {
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 60px, black calc(100% - 60px), transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, black 60px, black calc(100% - 60px), transparent 100%);
}

.track-grid::-webkit-scrollbar {
    display: none;
}

.track-grid .track-card {
    min-width: 200px;
    max-width: 200px;
}

.track-section-wrapper {
    position: relative;
    width: 100%;
    margin-bottom: 1.5rem;
}

.select-track-btn {
    width: 100%;
    margin-top: 1rem;
    padding: 0.8rem;
}

.select-track-btn:active {
    transform: scale(0.98);
}

.track-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    /* Flex column for bottom button alignment */
    display: flex;
    flex-direction: column;
    height: 100%;
    /* Ensure card fills grid height */
}

@media (hover: hover) {
    .track-card:hover {
        transform: translateY(-5px);
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(255, 255, 255, 0.3);
    }
}

/* Arrow Navigation */
.scroll-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;

    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

    color: var(--accent);
    cursor: pointer;

    display: flex;
    align-items: center;
    justify-content: center;

    transition: all 0.3s ease;
}

@media (hover: hover) {
    .scroll-arrow:hover {
        background: rgba(216, 180, 254, 0.2);
        border-color: var(--accent);
        box-shadow: 0 0 20px rgba(109, 40, 217, 0.3);
        transform: translateY(-50%) scale(1.1);
    }
}

.scroll-arrow:active {
    transform: translateY(-50%) scale(0.95);
}

.scroll-arrow-left {
    left: -24px;
}

.scroll-arrow-right {
    right: -24px;
}

.scroll-arrow.hidden {
    opacity: 0;
    pointer-events: none;
}

.scroll-arrow svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2.5;
}

.select-track-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--accent);
    color: #000;
    /* Reverting to black as per screenshot/theme */
    border: none;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    margin-top: auto;
    /* Pushes button to bottom */
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

@media (hover: hover) {
    .select-track-btn:hover {
        transform: scale(1.02);
        box-shadow: 0 4px 12px rgba(216, 180, 254, 0.4);
    }
}

.album-art-placeholder {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 12px;
    margin-bottom: 0.5rem;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    /* Prevent shrinking */
    background-color: rgba(255, 255, 255, 0.08);
    background-size: cover;
    background-position: center;
}

/* Grid sections fade in when images are ready */
.track-section-wrapper {
    opacity: 0;
    transition: opacity 0.4s ease;
}

.track-section-wrapper.images-ready {
    opacity: 1;
}

.search-results-grid {
    opacity: 0;
    transition: opacity 0.4s ease;
}

.search-results-grid.images-ready {
    opacity: 1;
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

@media (hover: hover) {
    .track-card:hover .card-overlay {
        opacity: 1;
    }
}

.track-card.playing .card-overlay {
    opacity: 1;
}

.play-btn-overlay {
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0;
    cursor: pointer;
    /* transform: scale(0.8); <-- Removed to fix size jump bug */
    transition: transform 0.2s ease, background 0.2s ease;
    position: relative;
    z-index: 10;
}

.play-btn-overlay:hover {
    transform: scale(1.2);
    /* Creates similar size to previous 50px * 1.1 scale */
}

/* Play/Pause Icon States */
.play-btn-overlay::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
}

/* PLAY icon (triangle) */
.play-btn-overlay.paused::before {
    width: 0;
    height: 0;
    border-left: 0.5em solid #000;
    border-top: 0.35em solid transparent;
    border-bottom: 0.35em solid transparent;
    margin-left: 0.1em;
}

/* PAUSE icon (two bars) */
.play-btn-overlay.playing::before {
    width: 0.15em;
    height: 0.7em;
    background: #000;
    box-shadow: 0.3em 0 0 #000;
    border: none;
    margin-left: -0.15em;
}

.track-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;

    /* Allow up to 1 line */
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;

    /* Allow up to 1 line */
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Section 2: Isolation (Stem List) */

/* Isolation Header Wrapper (Info + Guide) */
.isolation-header-wrapper {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    width: 100%;
}

#selected-track-info {
    flex: 0 0 40%;
    width: 40%;
    /* Percentage-based for consistent ratio with Sonic Guide */
    margin-bottom: 0;
    max-width: 100%;
}

#selected-track-info img {
    border-radius: 12px;
    /* Kept for legacy or fallback, but wrapper handles it */
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.track-cover-wrapper {
    position: relative;
    width: 250px;
    height: 250px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    flex-shrink: 0;
}

.track-cover-wrapper img {
    width: 100%;
    height: 100%;
    border-radius: 0;
    /* Wrapper handles radius via overflow:hidden */
    box-shadow: none;
    margin-bottom: 0;
}

@media (hover: hover) {
    .track-cover-wrapper:hover .card-overlay {
        opacity: 1;
    }
}

.track-cover-wrapper.playing .card-overlay {
    opacity: 1;
}

#selected-track-info h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

#selected-track-info p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.sonic-guide-box {
    /* Take straight remaining space */
    flex: 1;
    min-width: 0;
    /* Prevent layout shift during loading */
    /* CSS Grid/Flex overflow fix */
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 1.5rem;
    color: #e2e8f0;
    font-size: 1rem;
    line-height: 1.6;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.guide-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.sonic-guide-box h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0;
    font-size: 1.2rem;
    color: var(--accent);
}

.guide-toggle-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: #fff;
    /* Changed from var(--text-muted) for visibility */
    width: 36px;
    /* Increased from 32px */
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.guide-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--accent);
    transform: scale(1.1);
}

.toggle-icon {
    font-size: 0.9rem;
    /* Increased from 0.7rem */
    transition: transform 0.3s ease;
}

.sonic-guide-content {
    margin-top: 1rem;
    opacity: 1;
    transition: opacity 0.3s ease;
}




.guide-item {
    margin-bottom: 1rem;
    line-height: 1.5;
}

.guide-item:last-child {
    margin-bottom: 0;
}

.guide-item.sub-item {
    margin-left: 2rem;
    font-size: 0.95em;
    color: #cbd5e1;
    margin-bottom: 0.5rem;
}

/* Removed: bold/purple styling no longer needed for plain text guides */
/* .guide-label {
    color: var(--accent);
    font-weight: 700;
} */

.guide-loading {
    color: var(--text-muted);
    font-style: italic;
    animation: pulse 1.5s infinite;
}

/* Confidence Info Button */
.confidence-info-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    padding: 0;
    flex-shrink: 0;
}

.confidence-info-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
    color: var(--accent);
    transform: scale(1.1);
}

.confidence-info-btn:active {
    transform: scale(0.95);
}

/* Confidence Popover */
.confidence-popover {
    position: absolute;
    top: 45px;
    right: 0;
    background: rgba(20, 20, 30, 0.95);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    z-index: 1000;
    white-space: nowrap;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Make guide-header position relative for popover positioning */
.sonic-guide-box .guide-header {
    position: relative;
}

.back-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s;
    padding: 0;
}

.back-btn:hover {
    color: #fff;
}

#isolation-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

/* Stem Rows */
.stem-row {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stem-row:hover {
    background: rgba(255, 255, 255, 0.06);
}

.stem-row.playing {
    border-color: var(--accent);
    background: rgba(109, 40, 217, 0.15);
    box-shadow: 0 0 20px rgba(109, 40, 217, 0.1);
}

/* Full Mix Special Styling */
.full-mix-row {
    margin-bottom: 2rem;
    background: linear-gradient(90deg, rgba(20, 20, 30, 0.6) 0%, rgba(109, 40, 217, 0.1) 100%);
}

.stem-label,
.stem-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 180px;
    /* Reduced from 220px */
    flex-shrink: 0;
}

.solo-btn {
    width: auto;
    /* Changed from fixed 45px */
    height: 45px;
    padding: 0 1.25rem;
    /* Added horizontal padding */
    border-radius: 25px;
    /* Softer pill shape */
    border: 2px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    white-space: nowrap;
    /* Prevent text wrapping inside button */
}

.solo-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.02);
}

.stem-row.playing .solo-btn {
    background: var(--accent);
    border-color: var(--accent);
    color: #000;
    box-shadow: 0 0 15px rgba(109, 40, 217, 0.6);
}

.stem-label span:last-child,
.stem-info h3 {
    font-weight: 600;
    font-size: 1.1rem;
    color: #fff;
    margin: 0;
}

.stem-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
}

/* Stems CSS removed */

/* Tutorial styles removed/hidden */
.hidden-view {
    display: none !important;
}

/* Media Queries */
@media (max-width: 768px) {
    /* main {
        padding: 1rem;
    } */

    /* Header rules moved to global scope for consistency */

    .header-main {
        gap: 0.8rem;
    }

    /* h1 {
        font-size: 2.2rem;
    } */

    /* .hero-text {
        margin-bottom: 2rem;
    } */

    .search-input {
        font-size: 1rem;
    }

    .search-container {
        gap: 0.25rem;
    }

    /* Top Tracks header - single line layout */
    .section-divider {
        flex-wrap: nowrap;
        /* Force single line instead of wrap */
        gap: 0.3rem;
        /* Minimal gap between elements */
        align-items: center;
    }

    /* Country selector - compact with flag only (JS modifies text) */
    #country-selector {
        font-size: 0.9rem;
        /* Match desktop font size */
        padding: 0.3rem 0.6rem;
        width: 3.5rem;
        /* Fixed width - doesn't expand when opened */
        margin-left: 0;
        /* Remove previous margin */
    }

    /* Genre selector - compact text */
    #genre-selector {
        font-size: 0.9rem;
        /* Match desktop and country selector */
        padding: 0.3rem 0.6rem;
        min-width: auto;
        max-width: none;
        /* Remove previous 50% constraint */
        margin-left: 0;
    }

    .track-grid {
        grid-template-columns: repeat(4, 160px);
        grid-auto-columns: 160px;
        gap: 1rem;
        max-height: calc(290px * 2 + 1rem);
        /* Pull grid closer to edge (1rem main padding - 0.5rem = 0.5rem gap) */
        margin-right: -0.5rem;
        margin-left: -0.5rem;
    }

    .track-grid .track-card {
        min-width: 160px;
        max-width: 160px;
    }

    /* .scroll-arrow {
        display: none;
    } */

    .scroll-arrow svg {
        width: 20px;
        height: 20px;
    }

    .scroll-arrow-left {
        left: -20px;
    }

    .scroll-arrow-right {
        right: -20px;
    }

    .isolation-header-wrapper {
        /* flex-direction: column;  <-- REMOVED to prevent jump */
        /* align-items: center; */
        /* gap: 1rem; */
    }

    /* #selected-track-info { width: 100%; } <-- REMOVED */

    #selected-track-info .track-cover-wrapper {
        width: 200px;
        height: 200px;
    }

    #isolation-container {
        padding-bottom: 4rem;
    }

    /* Make track card play buttons visible and tappable on mobile */
    .track-card .card-overlay {
        opacity: 0;
        background: transparent;
    }

    .track-card .play-btn-overlay {
        opacity: 1;
        width: 35px;
        height: 35px;
        transform: none;
    }

    .track-card.playing .card-overlay {
        opacity: 1;
    }

    .stem-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1rem;
    }

    .stem-label,
    .stem-info {
        width: 100%;
        margin-bottom: 0;
    }

    .stem-content,
    .stem-controls {
        width: 100%;
        height: 50px;
        justify-content: center;
    }

    .isolate-btn {
        width: 100%;
        padding: 0.8rem;
    }

    .stem-info h3 {
        font-size: 1rem;
    }

    .stem-icon {
        font-size: 1.5rem;
    }

    .search-results-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)) !important;
        justify-content: flex-start;
        gap: 1rem !important;
    }

    .search-results-grid .track-card {
        width: 100% !important;
        max-width: 200px !important;
        min-width: 150px !important;
        justify-self: start !important;
    }

    .ghost-track-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)) !important;
        justify-content: flex-start;
        gap: 1rem !important;
    }

    .ghost-track-grid .track-card {
        width: 100% !important;
        max-width: 200px !important;
        min-width: 150px !important;
        justify-self: start !important;
    }
}

@media (max-width: 768px) {
    .clear-search-btn {
        right: 8%;
    }
}

@media (max-width: 480px) {
    .stem-row {
        gap: 0.8rem;
    }

    .stem-icon {
        font-size: 1.3rem;
        width: 30px;
    }

    .search-container {
        flex-direction: row;
        gap: 0.25rem !important;
        align-items: center;
        width: 100%;
    }

    .search-input-wrapper {
        flex: 1;
        max-width: none;
    }

    .search-input {
        width: 100%;
        font-size: 16px;
        -webkit-appearance: none;
        appearance: none;
    }

    /* Further compact the header for smaller screens */
    .section-divider {
        gap: 0.25rem;
    }

    #country-selector {
        font-size: 0.9rem;
        /* Match desktop font size */
        padding: 0.25rem 0.5rem;
        width: 3.25rem;
        /* Fixed width - doesn't expand when opened */
    }

    #genre-selector {
        font-size: 0.9rem;
        /* Match desktop and country selector */
        padding: 0.25rem 0.5rem;
    }

    .track-grid {
        grid-template-columns: repeat(3, 140px);
        grid-auto-columns: 140px;
        gap: 1rem;
        max-height: calc(252px * 2 + 1rem);
        /* Pull grid closer to edge (1rem main padding - 0.5rem = 0.5rem gap) */
        margin-right: -0.5rem;
    }

    .track-grid .track-card {
        min-width: 140px;
        max-width: 140px;
    }

    .scroll-arrow {
        width: 36px;
        height: 36px;
    }

    .scroll-arrow svg {
        width: 18px;
        height: 18px;
    }

    .scroll-arrow-left {
        left: -18px;
    }

    .scroll-arrow-right {
        right: -18px;
    }

    .track-title {
        font-size: 0.95rem;
        -webkit-line-clamp: 1;
        line-clamp: 1;
    }

    .track-artist {
        font-size: 0.85rem;
        -webkit-line-clamp: 1;
        line-clamp: 1;
    }

    .select-track-btn {
        padding: 0.6rem;
        font-size: 0.9rem;
    }

    .home-mode-toggle-container {
        margin-top: 1.5rem;
        margin-bottom: 2rem;
    }

    .home-mode-toggle {
        padding: 3px !important;
        gap: 3px !important;
        border-radius: 20px !important;
    }

    .home-toggle-option {
        padding: 0.5rem 0.8rem !important;
        font-size: 0.82rem !important;
        border-radius: 17px !important;
    }

    .empty-state-message {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .empty-state-message p {
        font-size: 0.95rem;
    }

    .search-results-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)) !important;
        justify-content: flex-start;
        gap: 1rem !important;
    }

    .search-results-grid .track-card {
        width: 100% !important;
        max-width: 180px !important;
        min-width: 130px !important;
        justify-self: start !important;
    }

    .ghost-track-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)) !important;
        justify-content: flex-start;
        gap: 1rem !important;
    }

    .ghost-track-grid .track-card {
        width: 100% !important;
        max-width: 180px !important;
        min-width: 130px !important;
        justify-self: start !important;
    }

    .streaming-links-header {
        font-size: 0.8rem;
        margin-bottom: 0.6rem;
    }

    .streaming-pill img {
        width: 1.2rem;
        height: 1.2rem;
    }
}

/* Section Headers */
.section-divider {
    display: flex;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin: 1.5rem 0 0.75rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--glass-border);
    position: relative;
    letter-spacing: -0.01em;
}

.section-divider::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--accent);
    box-shadow: 0 0 12px rgba(216, 180, 254, 0.6);
}

.section-divider span {
    background: transparent;
    padding: 0;
}

/* Country Selector Dropdown */
.country-select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 0.4rem 1rem;
    color: var(--text-main);
    font-size: 0.9rem;
    font-family: var(--font-main);
    margin-left: 1rem;
    cursor: pointer;
    outline: none;
    transition: all 0.2s ease;
}

.country-select:hover,
.country-select:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.15);
}

.country-select option {
    background: #1a1a2e;
    color: #fff;
}

/* Waveform Handles & Selection */
/* Waveform handles removed */

/* Mode toggle removed */

/* Home Toggle (Discover / Favorites) */
.home-mode-toggle-container {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    margin-bottom: 1.5rem;
}

.home-mode-toggle {
    display: flex;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 4px;
    gap: 4px;
    border: 1px solid var(--glass-border);
    width: fit-content;
}

.home-toggle-option {
    padding: 0.6rem 1.8rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
    background: transparent;
    border: none;
    transition: all 0.2s;
    font-weight: 500;
    white-space: nowrap;
    font-family: inherit;
}

.home-toggle-option.active {
    background: var(--accent);
    color: #000;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.home-toggle-option:hover:not(.active) {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

/* Home Tab Content */
.home-tab-content {
    display: none;
}

.home-tab-content.active {
    display: block;
}

/* Search Results Grid - Full width, vertical expansion */
.search-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    width: 100%;
    padding-bottom: 2rem;
}

.search-results-grid .track-card {
    width: 100%;
    max-width: 250px;
    min-width: auto;
    justify-self: center;
}

/* Favorites Empty State */
.favorites-empty-state {
    position: relative;
}

.empty-state-message {
    text-align: center;
    padding: 1rem 1.5rem;
    margin-bottom: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.empty-state-message p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

/* Ghost Track Cards */
.ghost-track-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    width: 100%;
    padding-bottom: 2rem;
}

.ghost-track-grid .track-card {
    width: 100%;
    max-width: 250px;
    min-width: auto;
    justify-self: center;
}

.ghost-card {
    opacity: 0.4;
    filter: blur(2px);
    pointer-events: none;
    user-select: none;
}

.ghost-card:hover {
    transform: none;
    background: rgba(255, 255, 255, 0.05);
}

.ghost-card .track-title,
.ghost-card .track-artist {
    color: transparent;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.2) 50%, rgba(255, 255, 255, 0.1) 100%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
    border-radius: 4px;
}

.ghost-card .select-track-btn {
    opacity: 0.5;
    cursor: not-allowed;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

/* Lucky Button */
.lucky-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    flex-shrink: 0;
}

.lucky-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
    border-color: var(--accent);
    box-shadow: 0 0 15px rgba(216, 180, 254, 0.3);
}

.lucky-btn.spinning {
    animation: spin 1s linear infinite;
    pointer-events: none;
    opacity: 0.7;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* --- Track Header & Metadata (New) --- */
/* --- Track Header & Metadata (New) --- */
.track-header-layout {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    /* Fill parent container */

    /* Unified Background Styling */
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Row 1: Cover Art + Song Name + Artist Name (horizontal) */
.track-info-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1.5rem;
    container-type: inline-size;
    container-name: track-row;
}

.track-info-row .track-cover-wrapper {
    /* All layouts: 45% */
    width: 45% !important;
    height: auto !important;
    aspect-ratio: 1;
    flex-shrink: 0;
}

.track-text-container {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
    min-width: 0;
    /* Allow text truncation */
}

#selected-track-info .track-title-inline {
    /* Font scales with container width (cover art is 45% of container) */
    font-size: clamp(1rem, 6cqi, 5rem);
    font-weight: 700;
    margin: 0;
    line-height: 1.2;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

#selected-track-info .artist-name-inline {
    /* Font scales with container width */
    font-size: clamp(0.8rem, 4cqi, 4rem);
    color: var(--text-muted);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* Row 2: Favorite Button (Now inside text container) */
.track-fav-row {
    display: flex;
    align-items: center;
    /* justify-content handled inline or by parent */
}

/* Row 3: Streaming Links (already styled) */

.track-cover-art {
    /* Used inside wrapper */
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    object-fit: cover;
}

/* Old .track-details rules - no longer used with new layout */

.track-metadata-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 0.75rem;
}

.track-metadata-grid {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 1.5rem;
    justify-content: start;
    margin-top: 1rem;
}

.meta-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
}

.meta-icon {
    font-size: 1.5rem;
}

.meta-value {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Streaming Links Box */
.streaming-links-box {
    width: 100%;
}

.streaming-links-header {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    margin-top: 0.25rem;
    width: 100%;
}

.streaming-links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
}

/* Ensure icons fit on one row */
.streaming-links-grid .meta-pill {
    padding: 0.5rem 0.6rem !important;
}

.streaming-pill {
    padding: 0.5rem;
    cursor: pointer;
    text-decoration: none;
}

.streaming-icon {
    width: 1.2rem;
    height: 1.2rem;
    display: block;
}

.streaming-icon.external-icon {
    object-fit: contain;
    /* Invert filter to make black icons white if needed, but these are likely colored */
    /* Adjust as needed based on the actual SVG content */
}


/* Mobile Responsive */
@media (max-width: 768px) {
    #selected-track-info {
        width: 100%;
        flex: auto;
    }

    .track-header-layout,
    .sonic-guide-box {
        width: 100%;
        flex: auto;
    }

    /* .track-header-layout inherited from global (column) */

    .isolation-header-wrapper {
        flex-direction: column;
        gap: 1.5rem;
    }

    /* .track-header-layout {
        padding: 1rem;
        gap: 0.75rem;
    } */

    /* .track-info-row {
        gap: 1rem;
    } */

    /* Track info font/cover rules moved to 640px breakpoint for cleaner structure */

    .track-metadata-grid {
        gap: 0.5rem;
        grid-template-columns: 1fr;
    }

    .meta-item {
        flex-direction: row;
        align-items: center;
        gap: 0.5rem;
    }

    /* .streaming-links-box {
        margin-top: 1rem;
    } */

    /* .streaming-links-grid {
        gap: 0.5rem;
    } */

    /* .streaming-icon {
        width: 1.2rem;
        height: 1.2rem;
    } */
}

/* --- Metadata Pills --- */
.guide-metadata-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.meta-pill {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #e2e8f0;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.meta-pill:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.meta-pill.placeholder {
    /* Remove fixed height to let content sizing take over */
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.6;
    }

    50% {
        opacity: 0.3;
    }

    100% {
        opacity: 0.6;
    }
}

.meta-pill.animate-in {
    animation: fadeScaleIn 0.4s ease-out backwards;
}

@keyframes fadeScaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Favorites System */
.fav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.5rem;
    transition: all 0.2s ease;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fav-btn:hover {
    color: var(--accent);
    transform: scale(1.1);
}

.fav-btn.active {
    color: #ef4444;
    /* Red for heart */
    filter: drop-shadow(0 0 8px rgba(239, 68, 68, 0.4));
    animation: heartPop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.fav-btn.active svg {
    fill: currentColor;
}

@keyframes heartPop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.3);
    }

    100% {
        transform: scale(1);
    }
}

/* Quick Favorite Button on Cards */
.card-fav-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 20;
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.track-card:hover .card-fav-btn,
.card-fav-btn.active {
    opacity: 1;
    transform: translateY(0);
}

.card-fav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: scale(1.1);
}

.card-fav-btn.active {
    color: #ef4444;
    background: rgba(0, 0, 0, 0.6);
}

.card-fav-btn.active svg {
    fill: currentColor;
}

/* Card Actions Container */
.card-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
    /* Push to bottom of card */
    width: 100%;
}

/* Updated Select Button (Flex Child) */
.track-card .select-track-btn {
    flex: 1;
    /* Take remaining space */
    margin-top: 0;
    /* Reset margin since container handles spacing */
}

/* Updated Favorite Button (Static Config) */
.card-fav-btn {
    position: static !important;
    /* Override absolute */
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.05);
    /* Match card theme */
    border: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 1 !important;
    /* Always visible */
    transform: none !important;
}

.card-fav-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    color: white;
}

.card-fav-btn.active {
    background: rgba(239, 68, 68, 0.15);
    /* Red tint */
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* Ensure icons are centered */
.card-fav-btn svg {
    pointer-events: none;
}

/* Rectangular Favorite Button */
.card-fav-btn {
    position: static !important;
    width: auto !important;
    /* Allow growing */
    min-width: 48px;
    /* Square-ish minimum */
    height: auto !important;
    /* Match flex height */
    aspect-ratio: 1;
    /* Keep it roughly square if icon only, or remove for full rect */

    border-radius: 8px !important;
    /* Match Select button */

    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);

    opacity: 1 !important;
    transform: none !important;

    /* Ensure icon centering */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    /* Let flex/aspect controls size */
}

/* Ensure both buttons stretch to same height in the flex container */
.card-actions {
    align-items: stretch;
    /* Stretch children to fill height */
}

.card-fav-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    color: white;
}

.card-fav-btn.active {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* Fix height: Ensure button takes height from sibling Select button, not aspect ratio */
.card-fav-btn {
    aspect-ratio: auto !important;
    padding: 0 1.2rem !important;
    /* Rectangular shape via padding */
    width: auto !important;
    min-width: auto !important;
    height: auto !important;
    /* Follow flex stretch */
}

/* Ensure flex container stretches both to same height */
/* The Select button (with text) will define the natural height of the row */
.card-actions {
    align-items: stretch !important;
}

/* Mobile Overflow Fix for Card Actions */
@media (max-width: 480px) {
    .track-card {
        padding: 0.6rem !important;
        /* More space for content */
    }

    .card-actions {
        gap: 0.4rem !important;
    }

    .card-fav-btn {
        padding: 0 0.5rem !important;
        /* Tighter padding */
        min-width: 36px !important;
    }

    .select-track-btn {
        padding: 0.5rem 0.2rem !important;
        /* Compact padding */
        font-size: 0.85rem;
    }
}

/* Tablet Overflow Fix (Extend Mobile Styles up to 1024px) */
@media (max-width: 1024px) {
    .track-card {
        padding: 0.6rem !important;
    }

    .card-actions {
        gap: 0.4rem !important;
    }

    .card-fav-btn {
        padding: 0 0.5rem !important;
        min-width: 36px !important;
    }

    .select-track-btn {
        padding: 0.5rem 0.2rem !important;
        font-size: 0.85rem;
    }

    .scroll-arrow {
        display: none;
    }
}

/* Theme Favorite Button (Purple instead of Red) */
.card-fav-btn.active,
.fav-btn.active {
    color: var(--accent) !important;
    background: rgba(216, 180, 254, 0.15) !important;
    border-color: rgba(216, 180, 254, 0.3) !important;
    filter: drop-shadow(0 0 5px rgba(216, 180, 254, 0.3)) !important;
}

/* Hover state for active button */
.card-fav-btn.active:hover,
.fav-btn.active:hover {
    background: rgba(216, 180, 254, 0.25) !important;
    color: #fff !important;
}

/* Styling Select Button to Match Favorite Button (Glass Style) */
.select-track-btn {
    background: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    color: #fff !important;
    /* White text instead of black */
    font-weight: 500 !important;
    /* Slightly lighter weight */
    transform: none !important;
    /* Remove any default transforms */
    box-shadow: none !important;
    transition: all 0.2s ease !important;
}

/* Match Hover State of Favorite Button */
.select-track-btn:hover {
    background: rgba(255, 255, 255, 0.15) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    transform: none !important;
    /* Prevent scaling */
    box-shadow: none !important;
    /* Prevent shadow */
    color: #fff !important;
}

/* Ensure active state (click) feels responsive */
.select-track-btn:active {
    background: rgba(255, 255, 255, 0.1) !important;
    transform: scale(0.98) !important;
}

/* Revert Select Button to Original Visuals but Keep Static Hover */
.select-track-btn {
    background: var(--accent) !important;
    border: none !important;
    color: #000 !important;
    font-weight: 700 !important;
    opacity: 1;
}

/* Hover: Keep the "No Animation" behavior (match favorite button mechanics) */
.select-track-btn:hover {
    background: var(--accent) !important;
    /* Keep same color */
    transform: none !important;
    /* NO scaling */
    box-shadow: none !important;
    /* NO shadow */
    filter: brightness(1.1);
    /* Subtle brightness boost instead of movement */
}

.select-track-btn:active {
    transform: scale(0.98) !important;
    /* Keep click feedback */
}

/* Remove White Highlight on Hover */

/* 1. Select Button: Keep text Black on hover */
.select-track-btn:hover {
    color: #000 !important;
}

/* 2. Inactive Favorite Button: Keep original greyish text */
.card-fav-btn:hover {
    color: rgba(255, 255, 255, 0.7) !important;
}

/* 3. Active Favorite Button: Keep Purple text */
.card-fav-btn.active:hover,
.fav-btn.active:hover {
    color: var(--accent) !important;
}

/* Fix Flicker: Prevent color transition lag */
.card-fav-btn {
    transition-property: background, border-color, transform, box-shadow !important;
    /* Exclude 'color' from transition to prevent white flash interp */
}

/* Hard override to ensure no white text leaks through */
.card-fav-btn:hover {
    color: rgba(255, 255, 255, 0.7) !important;
}

.card-fav-btn.active,
.card-fav-btn.active:hover {
    color: var(--accent) !important;
}

/* Fix Grid Flicker: Disable fade mask on Desktop */
@media (min-width: 1025px) {

    .track-grid,
    .track-grid.can-scroll-left,
    .track-grid.can-scroll-right,
    .track-grid.can-scroll-left.can-scroll-right {
        mask-image: none !important;
        -webkit-mask-image: none !important;
    }
}

/* Unify Main Favorite Button (.fav-btn) to Match Card Button (.card-fav-btn) */
.fav-btn {
    /* Match dimensions and shape */
    width: auto !important;
    height: 36px !important;
    /* Match card button height */
    padding: 0 0.8rem !important;
    border-radius: 8px !important;

    /* Match Visuals (Glass) */
    background: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    color: rgba(255, 255, 255, 0.7);

    /* Flex alignment */
    display: flex;
    align-items: center;
    justify-content: center;

    /* Transitions (exclude color to prevent flicker) */
    transition-property: background, border-color, transform, box-shadow !important;
    transition-duration: 0.2s;
    transform: none !important;
    /* Remove old scale effect */
}

.fav-btn:hover {
    background: rgba(255, 255, 255, 0.15) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    color: rgba(255, 255, 255, 0.7) !important;
    /* Keep greyish unless active */
}

/* Active State (Purple) */
.fav-btn.active {
    color: var(--accent) !important;
    background: rgba(216, 180, 254, 0.15) !important;
    border-color: rgba(216, 180, 254, 0.3) !important;
    filter: drop-shadow(0 0 5px rgba(216, 180, 254, 0.3)) !important;
    animation: none !important;
    /* Remove old pop animation */
}

.fav-btn.active:hover {
    color: var(--accent) !important;
    background: rgba(216, 180, 254, 0.25) !important;
}

/* Ensure SVG matches size */
.fav-btn svg {
    width: 18px;
    height: 18px;
    pointer-events: none;
}

/* Old layout rules - no longer needed with new 3-row structure */

/* Favorite Button in Track Details */
#track-fav-btn {
    margin: 0;
}

/* Metadata Pills in Sonic Guide Box */
#sonic-guide-box .track-metadata-pills {
    justify-content: flex-start;
    margin: 1rem 0 0.5rem 0;
}

/* Tablet responsive adjustments (641px - 1024px only) */
@media (max-width: 1024px) and (min-width: 641px) {

    /* Keep horizontal layout like desktop */
    /* .isolation-header-wrapper {
        flex-direction: row;
        align-items: stretch;
        gap: 1.5rem;
    } */

    /* #selected-track-info {
        flex: 0 0 40%;
        width: auto;
    } */

    /* .sonic-guide-box {
        flex: 1;
    } */

    /* .track-header-layout {
        gap: 1rem;
    } */

    /* .track-info-row {
        gap: 1.25rem;
    } */

    .track-info-row .track-cover-wrapper {
        width: 45% !important;
        height: auto !important;
        aspect-ratio: 1;
    }

    /* Font sizes now handled by container queries */

    #track-fav-btn {
        width: 100%;
        max-width: 200px;
    }

    #sonic-guide-box .track-metadata-pills {
        justify-content: flex-start;
    }

    .sonic-guide-box {
        width: 100%;
        /* Force full width on mobile to prevent shrink-to-fit on loading */
    }
}

@media (max-width: 640px) {
    .isolation-header-wrapper {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .glass-header {
        margin-bottom: 1rem;
    }

    h1 {
        font-size: 2.2rem;
        /* Reduced from 3.5rem at 640px instead of 768px */
    }

    #selected-track-info {
        width: 100%;
        flex: 0 0 auto;
        margin-bottom: 0;
    }

    .track-info-row .track-cover-wrapper {
        width: 45% !important;
    }

    /* Font sizes now handled by container queries */
}

.hidden-waveforms {
    display: none !important;
}

/* Loading Spinner */
.loader {
    display: none;
    /* Hidden by default */
    padding: 100px 0;
    align-items: center;
    justify-content: center;
}

.loader::before {
    content: '';
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top: 3px solid #fff;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}