.sidebar {
    transition: width 0.3s cubic-bezier(0.4,0,0.2,1), min-width 0.3s, padding 0.3s;
    z-index: 100;
}
.sidebar.collapsed {
    width: 0;
    min-width: 0;
    padding-left: 0;
    padding-right: 0;
    overflow: hidden;
    border-right: none;
}
#sidebar-toggle {
    position: fixed;
    top: 64px;
    left: 0;
    z-index: 200;
    background: #572424;
    color: #ffe0e0;
    border: none;
    border-radius: 0 6px 6px 0;
    padding: 8px 12px;
    font-size: 1.5em;
    cursor: pointer;
    transition: background 0.2s;
    box-shadow: 2px 2px 8px rgba(0,0,0,0.15);
}
#sidebar-toggle:hover {
    background: #a05a5a;
}
.main-content.sidebar-collapsed {
    margin-left: 0 !important;
    transition: margin-left 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* Modern CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Modern Dark Theme Color Palette */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --bg-card: #252525;
    --bg-gradient: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    
    /* Accent Colors */
    --accent-primary: #ff6b35;
    --accent-secondary: #f7931e;
    --accent-tertiary: #ffb347;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #b0b0b0;
    --text-accent: #ff6b35;
    
    /* Border and UI Colors */
    --border-color: #404040;
    --border-accent: #ff6b35;
    --progress-color: linear-gradient(90deg, #ff6b35, #f7931e);
    --shadow-color: rgba(0, 0, 0, 0.5);
    
    /* Interactive States */
    --hover-bg: #3a3a3a;
    --active-bg: #404040;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 12px;
    --border-radius-small: 6px;
    --box-shadow: 0 4px 20px var(--shadow-color);
    --box-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.7);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Typography */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    background-attachment: fixed;
    font-size: 16px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-weight: 400;
}

/* Layout Containers */
.main-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 1rem;
    min-height: 100vh;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem 0;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.header-content img {
    filter: brightness(1.3) contrast(1.1);
}

.music-staff {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    opacity: 0.9;
    filter: brightness(1.1) contrast(1.1);
}

/* Audio Player Section */
.audio-player-section {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.audio-controls {
    display: grid;
    grid-template-columns: auto auto 1fr auto auto;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1rem;
}

.play-pause-btn, .volume-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-accent);
    border-radius: 50%;
    padding: 0.6rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-pause-btn:hover, .volume-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(255, 107, 53, 0.3);
    border-color: var(--accent-secondary);
}

.play-pause-btn img, .volume-btn img {
    position: relative;
    z-index: 1;
    filter: brightness(1.1) contrast(1.0);
}

.time-display {
    display: flex;
    align-items: center;
}

.time-label {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 0.9rem;
    color: var(--text-accent);
    font-weight: 500;
    min-width: 45px;
    text-align: center;
    background: var(--bg-tertiary);
    padding: 0.3rem 0.6rem;
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Progress Bar Styles */
.progress-container {
    flex: 1;
    padding: 0 0.5rem;
}

.progressBarContainerDiv {
    position: relative;
    background: var(--bg-tertiary);
    height: 24px;
    width: 100%;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.progressBarContainerDiv:hover {
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3), 0 0 15px rgba(255, 107, 53, 0.2);
    border-color: var(--border-accent);
}

.progressBarDiv {
    background: var(--progress-color);
    height: 100%;
    width: 0;
    border-radius: 12px;
    transition: width 0.1s ease;
    position: relative;
    overflow: hidden;
}

.progressBarDiv::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.2) 0%, 
        rgba(255, 255, 255, 0.1) 50%, 
        rgba(255, 255, 255, 0.2) 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Volume Controls */
.volume-controls {
    position: relative;
}

.volume-slider {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-card);
    border: 2px solid var(--border-accent);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--box-shadow-hover);
    z-index: 100;
    margin-top: 0.5rem;
    min-width: 150px;
    backdrop-filter: blur(10px);
}

/* Ensure volume slider stays within viewport */
@media (max-width: 768px) {
    .volume-slider {
        right: 0;
        left: auto;
        transform: translateX(0);
        min-width: 140px;
    }
}

@media (max-width: 480px) {
    .volume-slider {
        right: 0;
        left: auto;
        transform: translateX(-20px); /* Pull it in from the edge */
        min-width: 120px;
    }
}

#volumeInput {
    width: 120px;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

@media (max-width: 480px) {
    #volumeInput {
        width: 80px;
    }
}

#volumeInput::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

#volumeInput::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(255, 107, 53, 0.5);
}

#volumeInput::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Now Playing Section */
.now-playing {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.now-playing-info {
    display: flex;
    align-items: center;
}

#nowPlayingTitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
    background: var(--bg-tertiary);
    padding: 0.6rem 1rem;
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.now-playing-image img {
    border-radius: var(--border-radius);
    border: 2px solid var(--border-accent);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.now-playing-image img:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
    border-color: var(--accent-secondary);
}

/* Instructions Section */
.instructions {
    text-align: center;
    margin-bottom: 2rem;
}

.instruction-text {
    font-size: 1.1rem;
    color: var(--text-accent);
    font-weight: 400;
    background: var(--bg-card);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: inline-block;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Music Grid */
.music-section {
    margin-bottom: 2rem;
}

.music-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

.music-item {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.2rem;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.music-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255, 107, 53, 0.05) 0%, 
        rgba(247, 147, 30, 0.05) 100%);
    opacity: 0;
    transition: var(--transition);
}

.music-item:hover::before {
    opacity: 1;
}

.music-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--border-accent);
}

.music-item-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.2rem;
    align-items: flex-start;
    position: relative;
    z-index: 1;
}

.music-item img {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-small);
    border: 2px solid var(--border-color);
    object-fit: cover;
    transition: var(--transition);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    /* Soften images to blend better with dark theme */
    filter: brightness(0.9) contrast(1.1) saturate(0.9);
}

.music-item:hover img {
    border-color: var(--border-accent);
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.2);
    filter: brightness(1) contrast(1.2) saturate(1);
}

.music-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    align-self: center;
}

.music-title {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 400;
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.music-filename {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    opacity: 0.8;
    line-height: 1.3;
    word-break: break-all;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        padding: 0.5rem;
    }
    
    .header-content img {
        max-width: 100%;
        height: auto;
    }
    
    .audio-controls {
        display: grid;
        grid-template-columns: auto auto 1fr auto;
        grid-template-rows: auto auto;
        gap: 0.75rem;
        align-items: center;
        margin-bottom: 1rem;
    }
    
    /* First row: Play button, elapsed time, remaining time, volume */
    .play-pause-btn { grid-column: 1; grid-row: 1; }
    .time-display:first-of-type { grid-column: 2; grid-row: 1; }
    .time-display:last-of-type { grid-column: 3; grid-row: 1; }
    .volume-controls { grid-column: 4; grid-row: 1; }
    
    /* Second row: Progress bar spans full width */
    .progress-container { 
        grid-column: 1 / -1; 
        grid-row: 2; 
        padding: 0;
        margin-top: 0.5rem;
    }
    
    .now-playing {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 0.5rem;
    }
    
    .music-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .audio-controls {
        grid-template-columns: auto 1fr auto auto;
        gap: 0.5rem;
    }
    
    /* Rearrange for very small screens */
    .play-pause-btn { grid-column: 1; grid-row: 1; }
    .time-display:first-of-type { grid-column: 2; grid-row: 1; justify-self: start; }
    .time-display:last-of-type { grid-column: 3; grid-row: 1; justify-self: end; }
    .volume-controls { grid-column: 4; grid-row: 1; }
    
    .progress-container { 
        grid-column: 1 / -1; 
        grid-row: 2; 
    }
}

/* Legacy class compatibility */
.timeInput {
    /* Legacy class - styles now handled by .time-label */
    color: var(--text-accent);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

/* Hidden elements */
#audiocontainer, #audioplayer {
    display: none;
}

/* Additional text contrast and accessibility */
a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* Scrollbar styling for dark theme */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-accent);
}