:root {
    /* Colors - Indigo/Violet Theme (from pckeeper.es) */
    --indigo-400: #818cf8;
    --indigo-500: #6366f1;
    --indigo-600: #4f46e5;
    --indigo-700: #4338ca;
    --violet-400: #a78bfa;
    --violet-500: #8b5cf6;
    --violet-600: #7c3aed;

    /* Slate Colors */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;

    /* Semantic Colors */
    --bg-primary: #0f172a;
    --bg-secondary: var(--slate-900);
    --bg-tertiary: var(--slate-800);
    --text-primary: var(--slate-50);
    --text-secondary: var(--slate-300);
    --text-muted: var(--slate-400);
    --accent-primary: var(--indigo-500);
    --accent-secondary: var(--violet-500);
    --border-color: rgba(255, 255, 255, 0.08);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #0f172a;
    background-image:
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Glassmorphism utility - pckeeper.es style */
.glass {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header - pckeeper.es style */
.header {
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #f8fafc 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Navigation Tabs */
.tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-base);
}

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

.tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

/* Cards - pckeeper.es glassmorphism */
.card {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.2);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-sm);
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

/* Buttons - pckeeper.es gradients */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(30, 41, 59, 0.5);
    color: var(--slate-300);
    border: 1px solid rgba(100, 116, 139, 0.5);
}

.btn-secondary:hover {
    background: rgba(100, 116, 139, 0.5);
    color: white;
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid #ef4444;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
}

/* Icon-only Buttons - pckeeper.es style */
.btn-icon {
    background: transparent;
    border: none;
    color: var(--slate-300);
    cursor: pointer;
    padding: 0.6rem;
    border-radius: 50%;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.btn-icon:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--indigo-400);
    transform: translateY(-2px);
}

.btn-icon-danger:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}


/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.video-card {
    padding: 0;
    overflow: hidden;
}

.video-thumbnail {
    width: 100%;
    height: 150px;
    object-fit: cover;
    background: var(--slate-800);
}

.video-info {
    padding: var(--spacing-md);
}

.video-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.video-meta {
    display: flex;
    gap: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.video-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Code Block */
.code-block {
    background: var(--slate-950);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-sm) 0;
    position: relative;
}

.code-block pre {
    margin: 0;
    overflow-x: auto;
    color: var(--text-secondary);
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
}

.copy-btn {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    padding: var(--spacing-md);
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

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

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--slate-800);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: var(--spacing-sm) 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--indigo-500) 0%, var(--violet-500) 100%);
    transition: width var(--transition-slow);
}

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

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

.fade-in {
    animation: fadeIn var(--transition-slow) ease;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .header h1 {
        font-size: 2rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .tabs {
        overflow-x: auto;
    }
}

/* Custom Scrollbar - pckeeper.es style */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #0f172a;
}

::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

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

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

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

/* --- IMPROVED FILE BROWSER STYLES --- */



.file-browser {

    display: flex;

    flex-direction: column;

    gap: var(--spacing-md);

}



.browser-controls {

    display: flex;

    justify-content: space-between;

    align-items: center;

    padding: var(--spacing-sm);

    background: rgba(15, 23, 42, 0.3);

    border-radius: var(--radius-md);

    border: 1px solid var(--border-color);

}



.breadcrumbs {

    display: flex;

    align-items: center;

    gap: var(--spacing-xs);

    font-size: 0.9rem;

    color: var(--text-secondary);

    overflow-x: auto;

    white-space: nowrap;

    padding-bottom: 2px;

}



.breadcrumb-item {

    cursor: pointer;

    transition: color var(--transition-fast);

    padding: 2px 6px;

    border-radius: var(--radius-sm);

}



.breadcrumb-item:hover {

    color: var(--accent-primary);

    background: rgba(255, 255, 255, 0.05);

}



.breadcrumb-item.active {

    color: var(--accent-primary);

    font-weight: 700;

    cursor: default;

}



.breadcrumb-item.active:hover {

    background: none;

}



.separator {

    color: var(--text-muted);

    font-size: 0.8rem;

}



.btn-icon {

    background: transparent;

    border: none;

    color: var(--text-secondary);

    cursor: pointer;

    padding: var(--spacing-xs);

    border-radius: var(--radius-sm);

    transition: all var(--transition-fast);

    display: flex;

    align-items: center;

    justify-content: center;

}



.btn-icon:hover {

    color: var(--text-primary);

    background: rgba(255, 255, 255, 0.1);

}



#upload-file-list,

#file-list {

    display: grid;

    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));

    gap: var(--spacing-md);

    padding: var(--spacing-sm);

    background: rgba(15, 23, 42, 0.4);

    border-radius: var(--radius-md);

    border: 1px solid var(--border-color);

    min-height: 200px;

    max-height: 400px;

    overflow-y: auto;

}



.file-item {

    display: flex;

    flex-direction: column;

    align-items: center;

    justify-content: center;

    text-align: center;

    gap: var(--spacing-xs);

    padding: var(--spacing-sm);

    background: rgba(255, 255, 255, 0.03);

    border: 1px solid transparent;

    border-radius: var(--radius-md);

    cursor: pointer;

    transition: all var(--transition-base);

    min-height: 150px;

    position: relative;

    overflow: hidden;

}



.file-checkbox-wrapper {

    position: absolute;

    top: 0.5rem;

    left: 0.5rem;

    z-index: 10;

}



.file-checkbox {

    width: 1.2rem;

    height: 1.2rem;

    cursor: pointer;

    accent-color: var(--accent-primary);

    background: rgba(0,0,0,0.5);

    border-radius: 4px;

}



.file-item:hover {

    background: rgba(255, 255, 255, 0.08);

    transform: translateY(-4px);

    border-color: var(--accent-primary);

    box-shadow: var(--shadow-lg);

}



.file-item.directory {

    background: rgba(100, 116, 139, 0.1);

}



.file-item.directory:hover {

    background: rgba(100, 116, 139, 0.2);

}



.file-item.selected {

    background: rgba(99, 102, 241, 0.2);

    border-color: var(--accent-primary);

    transform: translateY(-2px);

    box-shadow: var(--shadow-md);

}



.file-icon {

    font-size: 3rem;

    margin-bottom: var(--spacing-sm);

    transition: transform var(--transition-base);

}



.file-item:hover .file-icon {

    transform: scale(1.1);

}



.file-item.directory .file-icon {

    color: var(--accent-secondary);

}



.file-item.file .file-icon {

    color: var(--accent-primary);

}



.file-info {

    width: 100%;

    word-break: break-word;

}



.file-name {

    font-size: 0.9rem;

    font-weight: 500;

    color: var(--text-primary);

    line-height: 1.3;

    display: -webkit-box;

    -webkit-line-clamp: 3;

    -webkit-box-orient: vertical;

    overflow: hidden;

}



.file-size {

    font-size: 0.8rem;

    color: var(--text-muted);

    margin-top: 4px;

}



.import-btn {

    margin-top: var(--spacing-sm);

    width: calc(100% - 2 * var(--spacing-sm));

    position: absolute;

    bottom: var(--spacing-sm);

    left: var(--spacing-sm);

    justify-content: center;

    opacity: 0;

    transform: translateY(10px);

    transition: all var(--transition-base);

}



.file-item:hover .import-btn {

    opacity: 1;

    transform: translateY(0);

}



.loading-spinner {

    grid-column: 1 / -1;

    display: flex;

    justify-content: center;

    align-items: center;

    padding: var(--spacing-xl);

    color: var(--text-muted);

    font-style: italic;

}