body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    /* Premium Subtle Gradient Background */
    background: linear-gradient(to top, #dfe9f3 0%, white 100%);
    background-attachment: fixed;
    color: #1a1a1a;
    overflow: hidden; /* App-like feel */
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* WinUI 3 Acrylic / Mica Material Simulation */
.mica-effect {
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(125%);
}

.acrylic-panel {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(30px);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* Range Slider Styling (WinUI style) */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: #0078d4; /* Windows Blue */
    cursor: pointer;
    margin-top: -6px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: #e0e0e0;
    border-radius: 2px;
}

input[type=range]:focus::-webkit-slider-runnable-track {
    background: #ccc;
}

/* Utilities */
.text-win-blue {
    color: #0078d4;
}

.bg-win-blue {
    background-color: #0078d4;
}

.hover-bg-subtle:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

.active-bg-subtle:active {
    background-color: rgba(0, 0, 0, 0.08);
}

.card-hover {
    transition: all 0.2s ease;
}
.card-hover:hover {
    background-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

/* Loader */
.loader {
    border: 3px solid #f3f3f3;
    border-radius: 50%;
    border-top: 3px solid #0078d4;
    width: 24px;
    height: 24px;
    -webkit-animation: spin 1s linear infinite; /* Safari */
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Lyric View */
/* Marquee Animation */
@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.animate-marquee {
    display: inline-block;
    white-space: nowrap;
    animation: marquee 10s linear infinite;
    padding-right: 50px; /* Space for loop */
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

@keyframes slideDownFade {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-slide-down {
    animation: slideDownFade 0.2s ease-out forwards;
}

.mask-image-gradient-bottom {
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 15%, black 85%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, black 15%, black 85%, transparent 100%);
}

.lyric-line {
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.4s, color 0.4s;
    opacity: 0.6;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 600;
    transform: scale(1);
    cursor: pointer;
    /* Layout safety for scaling */
    max-width: 80%; 
    margin-left: auto; 
    margin-right: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
    /* Performance */
    will-change: transform, opacity;
    backface-visibility: hidden;
}

.lyric-line:hover {
    opacity: 1;
}

.lyric-line.active {
    opacity: 1;
    color: #ffffff;
    transform: scale(1.2); /* Reduced slightly from 1.3 to prevent edge clipping */
    font-weight: 800;
    /* text-shadow is expensive, consider removing if lag persists, but keeping for now */
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    margin: 20px auto; /* Ensure centering */
}

.no-scrollbar::-webkit-scrollbar {
    display: none;
}

.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* Reusable Component Classes (Refactoring) */

/* Glassmorphism Surface */
.winui-glass {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(229, 231, 235, 0.5); /* gray-200 with opacity */
}

/* Icon Button */
.btn-icon-base {
    transition: all 0.2s ease;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon-base:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary Action Button */
.btn-primary {
    background-color: #0078d4;
    color: white;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background-color: #0063b1;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-primary:active {
    transform: scale(0.96);
}

/* Text Truncation */
.text-truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}



@media (max-width: 768px) {
    .mobile-controls-hidden {
        display: none !important;
    }
}