/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Pure black and white theme */
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-tertiary: #222222;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent-primary: #ffffff;
    --accent-secondary: #cccccc;
    --accent-success: #22c55e;
    --accent-error: #ef4444;
    --border-color: #333333;
    --border-hover: #555555;
    --radius: 8px;
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    transition: var(--transition);
}

/* Container */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.page-toggle {
    display: flex;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0.25rem;
}

.toggle-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: calc(var(--radius) - 2px);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.toggle-btn:hover {
    color: var(--text-primary);
}

.toggle-btn.active {
    background: var(--text-primary);
    color: var(--bg-primary);
}


.supported-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.supported-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* Main Content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.page-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

/* Convert Page */
.convert-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.convert-header {
    text-align: center;
}

.convert-header h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.convert-header p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.drop-zone {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.drop-zone:hover {
    border-color: var(--text-primary);
    background: var(--bg-tertiary);
}

.drop-zone.dragover {
    border-color: var(--text-primary);
    background: var(--bg-tertiary);
}

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

.drop-icon {
    font-size: 2rem;
    color: var(--text-secondary);
}

.drop-text p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.drop-hint {
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
}

.convert-queue {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.convert-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
}

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

.file-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.file-name {
    font-size: 0.85rem;
    color: var(--text-primary);
    font-weight: 500;
}

.file-details {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.convert-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.format-select {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    outline: none;
}

.convert-btn {
    background: var(--text-primary);
    border: none;
    color: var(--bg-primary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.convert-btn:hover {
    background: var(--text-secondary);
}

/* Upload Page */
.upload-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.upload-header {
    text-align: center;
}

.upload-header h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-header p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.upload-limits {
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    margin-top: 0.25rem !important;
}

.upload-zone {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.upload-zone:hover {
    border-color: var(--text-primary);
    background: var(--bg-tertiary);
}

.upload-zone.dragover {
    border-color: var(--text-primary);
    background: var(--bg-tertiary);
}

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

.upload-icon {
    font-size: 2rem;
    color: var(--text-secondary);
}

.upload-text p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.upload-hint {
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
}

.upload-queue {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.upload-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
}

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

.upload-progress {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.upload-progress-fill {
    height: 100%;
    background: var(--text-primary);
    width: 0%;
    transition: width 0.3s ease;
}

.uploaded-files {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.uploaded-item {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

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

.uploaded-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.uploaded-name {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

.uploaded-timer {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.share-link {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.share-url {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-family: monospace;
    outline: none;
    user-select: all;
}

.copy-btn {
    background: var(--text-primary);
    border: none;
    color: var(--bg-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    background: var(--text-secondary);
}

/* Input Section */
.input-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-container {
    display: flex;
    gap: 0.5rem;
}

#urlInput {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

#urlInput:focus {
    border-color: var(--text-primary);
}

#urlInput::placeholder {
    color: var(--text-muted);
}

#pasteBtn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.8rem 1rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

#pasteBtn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* Format Options */
.format-options {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.format-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.format-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.format-btn.active {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
}

/* Quality Options */
.quality-options {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1rem;
    margin-top: 1rem;
}

.quality-header {
    text-align: center;
    margin-bottom: 0.75rem;
}

.quality-header span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.quality-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.quality-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 0.8rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.quality-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.quality-btn.active {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
}


/* Results Section */
.results {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 1rem;
}

.video-info {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.video-thumbnail {
    width: 120px;
    height: 68px;
    border-radius: var(--radius);
    object-fit: cover;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

.video-details h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.video-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}


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

.download-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem 1rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.download-btn:hover {
    border-color: var(--text-primary);
    background: var(--bg-tertiary);
}

.download-btn .download-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.download-btn .download-quality {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Playlist Results */
.playlist-info {
    text-align: center;
    margin-bottom: 1.5rem;
}

.playlist-info h3 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.playlist-meta {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.playlist-preview {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.playlist-preview h4 {
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.playlist-scroll {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
}

.preview-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    transition: var(--transition);
}

.preview-item:hover {
    background: var(--bg-tertiary);
}

.preview-item:last-child {
    border-bottom: none;
}

/* Custom scrollbar for playlist */
.playlist-scroll::-webkit-scrollbar {
    width: 6px;
}

.playlist-scroll::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 3px;
}

.playlist-scroll::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.playlist-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

.preview-item .item-title {
    color: var(--text-primary);
    font-weight: 400;
}

.preview-item .item-duration {
    color: var(--text-muted);
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Progress */
.progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
}

.progress-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
}

.progress-details {
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    margin-top: 0.25rem !important;
}

.progress-bar {
    width: 100%;
    max-width: 300px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--text-primary);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 2px;
}

.progress-stats {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Error */
.error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
}

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

.error p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Footer */
.footer {
    margin-top: auto;
    padding-top: 2rem;
    text-align: center;
}

.footer p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer a:hover {
    color: var(--text-primary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
}

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

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.25rem;
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.terms-content {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.terms-content ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.terms-content li {
    margin-bottom: 0.5rem;
}

.terms-content strong {
    color: var(--text-primary);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 640px) {
    .container {
        padding: 1.5rem 1rem;
    }
    
    .header {
        margin-bottom: 3rem;
    }
    
    .logo h1 {
        font-size: 1.3rem;
    }
    
    .input-container {
        flex-direction: column;
    }
    
    .format-options {
        flex-wrap: wrap;
    }
    
    .video-info {
        flex-direction: column;
        text-align: center;
    }
    
    .video-thumbnail {
        align-self: center;
    }
}
/* Back Button */
.back-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 8px 15px;
    color: #888;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    color: white;
}