:root {
    --primary-color: #4CAF50;
    --primary-hover: #45a049;
    --primary-active: #3d8b40;
    --accent-color: #FF4081;
    --accent-hover: #f50057;
    --bg-color: #0a0a0a;
    --surface-color: rgba(15, 23, 42, 0.8);
    --surface-light: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --error-color: #ff4444;
    --success-color: #00C853;
    --warning-color: #FFA000;
    
    /* Animation durations */
    --transition-fast: 0.15s;
    --transition-normal: 0.25s;
    --transition-slow: 0.35s;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* Light theme variables */
[data-theme="light"] {
    --bg-color: #f5f5f5;
    --surface-color: rgba(255, 255, 255, 0.9);
    --surface-light: rgba(0, 0, 0, 0.1);
    --text-primary: #1a1a1a;
    --text-secondary: rgba(0, 0, 0, 0.7);
}

/* Loading screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.loader-circle {
    width: 48px;
    height: 48px;
    border: 3px solid var(--surface-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Header styles */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    z-index: 100;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--surface-light);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
}

/* Header controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-light);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.header-btn:hover {
    background: var(--surface-light);
    transform: translateY(-2px);
}

.header-btn.active {
    background: var(--primary-color);
    color: white;
}

/* Tooltips */
.tooltip {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface-color);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.header-btn:hover .tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Main content area */
.main-content {
    position: fixed;
    top: 80px;
    right: -420px;
    width: 400px;
    max-height: calc(100vh - 180px);
    z-index: 10;
    transition: all var(--transition-normal);
    padding: 1rem;
    pointer-events: none;
}

.main-content.visible {
    right: 1rem;
    pointer-events: all;
}

/* Upload area */
.upload-area {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(-20px);
    display: none;
}

.upload-area.visible {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

.upload-area.dragover {
    background: var(--surface-light);
    border: 2px dashed var(--primary-color);
}

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

.upload-content i {
    font-size: 3rem;
    color: var(--primary-color);
}

.upload-text h3 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.upload-progress {
    width: 100%;
    display: none;
}

.upload-progress.visible {
    display: block;
}

/* Progress bar container */
.progress-container {
    width: 100%;
    margin: 1rem 0;
    position: relative;
}

/* Main progress bar */
.progress-bar {
    position: relative;
    width: 100%;
    height: 4px;
    background: var(--surface-light);
    border-radius: 2px;
    cursor: pointer;
    overflow: visible;
}

/* Progress fill */
.progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--primary-color);
    border-radius: 2px;
    transition: width 0.1s ease;
}

/* Progress handle */
.progress-handle {
    position: absolute;
    top: 50%;
    left: 0;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border: 2px solid white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: var(--shadow-sm);
    pointer-events: none;
    z-index: 2;
    transition: transform 0.1s ease;
}

/* Progress handle hover effect */
.progress-bar:hover .progress-handle {
    transform: translate(-50%, -50%) scale(1.2);
}

/* Hide the default range input but keep it functional */
.seek-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    margin: 0;
    z-index: 1;
}

/* Active states for progress bar */
.progress-bar:active .progress-handle,
.progress-bar.dragging .progress-handle {
    transform: translate(-50%, -50%) scale(1.3);
    background: var(--primary-hover);
}

/* Mobile optimization */
@media (max-width: 768px) {
    .progress-handle {
        width: 16px;
        height: 16px;
    }
    
    .progress-bar {
        height: 6px;
    }
}

/* Playlist styles */
.playlist-container {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    opacity: 0;
    transform: translateY(-20px);
    display: none;
    transition: all var(--transition-normal);
}

.playlist-container.visible {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

.playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--surface-light);
}

.playlist-controls {
    display: flex;
    gap: 0.5rem;
}

.playlist-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--text-primary);
    background: var(--surface-light);
    border: 1px solid var(--surface-light);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.playlist-btn:hover {
    background: var(--surface-light);
    transform: translateY(-2px);
    color: var(--primary-color);
}

.playlist-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Light theme adjustments */
[data-theme="light"] .playlist-btn {
    background: var(--surface-light);
    border-color: var(--surface-light);
    color: var(--text-primary);
}

[data-theme="light"] .playlist-btn:hover {
    background: var(--surface-light);
    color: var(--primary-color);
}

[data-theme="light"] .playlist-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Track list */
.tracks-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 0.5rem;
}

.playlist-item {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.playlist-item:hover {
    background: var(--surface-light);
    transform: translateX(4px);
}

.playlist-item.active {
    background: var(--primary-color);
    color: white;
}

/* Player controls */
.controls-container {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 800px;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--surface-light);
    z-index: 100;
}

.now-playing-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.track-artwork {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: var(--radius-md);
    background: var(--surface-light);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid var(--surface-light);
}

.track-artwork i {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.track-artwork img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.music-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.control-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.control-btn:hover:not(:disabled) {
    background: var(--surface-light);
    transform: scale(1.1);
}

.play-pause-btn {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
}

.play-pause-btn:hover:not(:disabled) {
    background: var(--primary-hover);
}

/* Volume control */
.volume-control {
    position: relative;
    margin-left: auto;
}

.volume-slider-container {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    padding: 1rem;
    background: var(--surface-color);
    border: 1px solid var(--surface-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.volume-control:hover .volume-slider-container {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-8px);
}

/* Volume slider track */
.volume-slider-container .volume-track {
    position: relative;
    width: 100%;
    height: 4px;
    background: var(--surface-light);
    border-radius: 2px;
    overflow: hidden;
}

/* Volume progress bar */
.volume-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--primary-color);
    border-radius: 2px;
    pointer-events: none;
}

/* Volume handle */
.volume-handle {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    pointer-events: none;
}

/* Volume input range styling */
#volume {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    margin: 0;
    padding: 0;
}

/* Keyboard shortcuts */
.keyboard-shortcuts {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--surface-light);
    z-index: 90;
}

.shortcut-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.key {
    background: var(--surface-light);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    min-width: 24px;
    text-align: center;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .main-content {
        width: 100%;
        right: -100%;
        padding: 1rem;
    }

    .main-content.visible {
        right: 0;
    }

    .controls-container {
        bottom: 0;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        padding: 1rem;
    }

    .keyboard-shortcuts {
        display: none;
    }

    .volume-control {
        display: none;
    }
}

/* Animations */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

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

::-webkit-scrollbar-track {
    background: var(--surface-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-primary);
}

/* Fix visualization dropdown */
.viz-type-dropdown {
    position: fixed;
    top: 70px;
    right: 16px;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    z-index: 99;
    width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    border: 1px solid var(--surface-light);
}

.viz-type-dropdown.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.viz-type-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.viz-type-options button {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    text-align: left;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    width: 100%;
}

.viz-type-options button:hover {
    background: var(--surface-light);
}

.viz-type-options button.active {
    background: var(--primary-color);
    color: white;
}

.viz-type-options button i {
    width: 20px;
    text-align: center;
}

/* Fix main content area */
.main-content {
    position: fixed;
    top: 80px;
    right: -420px;
    width: 400px;
    max-height: calc(100vh - 180px);
    z-index: 10;
    transition: all var(--transition-normal);
    padding: 1rem;
    pointer-events: none;
}

.main-content.visible {
    right: 1rem;
    pointer-events: all;
}

/* Fix upload area and playlist container */
.upload-area,
.playlist-container {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--surface-light);
    backdrop-filter: blur(12px);
    margin-bottom: 1rem;
    overflow: hidden;
}

/* Fix controls container */
.controls-container {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 800px;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--surface-light);
    z-index: 100;
}

/* Fix header */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    z-index: 100;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--surface-light);
}

/* Fix buttons and controls */
.header-btn,
.control-btn,
.playlist-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--surface-light);
}

/* Fix progress bars */
.progress-bar {
    background: var(--surface-light);
    border: 1px solid var(--surface-light);
    overflow: hidden;
}

.progress-handle {
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border: 2px solid white;
    box-shadow: var(--shadow-md);
}

/* Fix volume control */
.volume-slider-container {
    width: 120px;
    padding: 1rem;
    background: var(--surface-color);
    border: 1px solid var(--surface-light);
}

/* Fix tooltips */
.tooltip {
    background: var(--surface-color);
    border: 1px solid var(--surface-light);
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    white-space: nowrap;
    pointer-events: none;
}

/* Fix keyboard shortcuts panel */
.keyboard-shortcuts {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--surface-light);
    z-index: 90;
}

/* Fix toast notifications */
.error-toast {
    position: fixed;
    top: 90px;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--surface-light);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-normal);
}

.error-toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.error-toast.error {
    border-color: var(--error-color);
    color: var(--error-color);
}

.error-toast.success {
    border-color: var(--success-color);
    color: var(--success-color);
}

/* Fix light theme colors */
[data-theme="light"] {
    --surface-light: rgba(0, 0, 0, 0.1);
    --surface-color: rgba(255, 255, 255, 0.9);
}

/* Prevent content shifting */
body {
    overflow: hidden;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
}

canvas {
    position: fixed !important;
    top: 0;
    left: 0;
    z-index: 1;
}

/* Add these styles for the no-tracks message */
.no-tracks-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
}

.no-tracks-message i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.no-tracks-message p {
    margin: 0 0 1rem 0;
}

.no-tracks-message .upload-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.no-tracks-message .upload-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

/* Style the file input and upload button */
#audio-upload {
    display: none;  /* Hide the default input */
}

.upload-content .upload-btn,
.no-tracks-message .upload-btn {
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.upload-content .upload-btn:hover,
.no-tracks-message .upload-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

/* Fix dark mode control buttons */
[data-theme="dark"] .control-btn {
    background: var(--surface-light);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .control-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Fix volume button styling */
.volume-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-light);
    color: var(--text-primary);
    border: 1px solid var(--surface-light);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.volume-btn:hover {
    background: var(--surface-light);
    transform: translateY(-2px);
}

/* Dark mode volume button */
[data-theme="dark"] .volume-btn {
    background: var(--surface-light);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .volume-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Volume slider improvements */
.volume-slider-container {
    width: 120px;
    padding: 1rem;
    background: var(--surface-color);
    border: 1px solid var(--surface-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Volume progress bar */
.volume-progress {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
    pointer-events: none;
}

/* Volume handle */
.volume-handle {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    pointer-events: none;
}

/* Volume input range styling */
#volume {
    width: 100%;
    -webkit-appearance: none;
    background: transparent;
    cursor: pointer;
}

#volume::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: var(--surface-light);
    border-radius: 2px;
    border: none;
}

#volume::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 0;
    width: 0;
}

#volume::-moz-range-track {
    width: 100%;
    height: 4px;
    background: var(--surface-light);
    border-radius: 2px;
    border: none;
}

#volume::-moz-range-thumb {
    height: 0;
    width: 0;
    border: none;
}

/* Playlist item artwork */
.playlist-item .track-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
}

.playlist-item .track-number {
    width: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.playlist-item .track-artwork {
    width: 40px;
    height: 40px;
    min-width: 40px;
}

/* Active track styling */
.playlist-item.active .track-artwork {
    border-color: var(--primary-color);
}

.playlist-item.active .track-artwork i {
    color: var(--primary-color);
}

/* Now playing info artwork */
.now-playing-info .track-artwork {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: var(--radius-md);
}

.now-playing-info .track-artwork i {
    font-size: 1.75rem;
}

/* Dark mode adjustments */
[data-theme="dark"] .track-artwork {
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .playlist-item.active .track-artwork {
    border-color: var(--primary-color);
    background: rgba(76, 175, 80, 0.1);
}