:root {
    --bg-base: #0b0f19;
    --bg-surface: #111827;
    --bg-surface-elevated: #1f2937;
    --bg-hover: #374151;
    --border: #374151;
    --border-light: #4b5563;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --accent-glow: rgba(56, 189, 248, 0.2);
    --folder: #f59e0b;
    --file: #60a5fa;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Navigation */
.site-header {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0.875rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.brand-badge {
    background: linear-gradient(135deg, #0284c7, #38bdf8);
    color: #fff;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 800;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

/* Main Container */
.main-wrapper {
    flex: 1;
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.25rem;
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #fff;
    margin-bottom: 0.5rem;
}

.hero-title span {
    background: linear-gradient(90deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Search Box Container */
.search-card {
    position: relative;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.search-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.select-control {
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

.select-control:focus {
    border-color: var(--accent);
}

.input-wrapper {
    flex: 1;
    min-width: 240px;
    position: relative;
}

.search-input {
    width: 100%;
    height: 100%;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s;
}

.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-primary {
    background-color: var(--accent);
    color: #0b0f19;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: #fff;
}

.btn-primary:active {
    transform: scale(0.98);
}

/* Autocomplete Suggestions Box */
.suggestions-box {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    max-height: 420px;
    overflow-y: auto;
    z-index: 100;
}

.suggestion-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: var(--text-primary);
    transition: background-color 0.15s;
    cursor: pointer;
}

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

.suggestion-item:hover, .suggestion-item.active {
    background-color: var(--bg-hover);
}

.suggestion-content {
    flex: 1;
    min-width: 0;
}

.suggestion-name {
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.suggestion-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    gap: 0.5rem;
    margin-top: 0.15rem;
}

.suggestion-size {
    font-family: monospace;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-left: auto;
    white-space: nowrap;
}

/* Metrics Cards */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.metric-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: #fff;
    margin-top: 0.25rem;
}

/* Breadcrumb Navigation */
.breadcrumb-bar {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    overflow-x: auto;
    white-space: nowrap;
    font-size: 0.875rem;
}

.breadcrumb-item a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 600;
}

.breadcrumb-sep {
    color: var(--text-muted);
}

/* Data Table */
.table-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th {
    background-color: #141c2e;
    padding: 0.875rem 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
    vertical-align: middle;
}

.data-table tr:hover td {
    background-color: var(--bg-hover);
}

.item-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--text-primary);
    text-decoration: none;
    word-break: break-all;
    font-weight: 500;
}

.item-link:hover {
    color: var(--accent);
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-category {
    background-color: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
    border: 1px solid rgba(56, 189, 248, 0.25);
}

.size-text {
    font-family: monospace;
    color: #cbd5e1;
    font-size: 0.85rem;
}

.btn-action {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.btn-action:hover {
    border-color: var(--accent);
    color: #fff;
    background-color: var(--bg-surface-elevated);
}

/* Pagination */
.pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

/* Icons */
.icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.icon-folder { color: var(--folder); }
.icon-file { color: var(--file); }
.icon-video { color: #a78bfa; }
.icon-archive { color: #f43f5e; }
.icon-exe { color: #10b981; }
.icon-doc { color: #f59e0b; }

/* Progress bar for category stats */
.progress-bar-wrap {
    width: 100%;
    background-color: var(--bg-surface-elevated);
    border-radius: 9999px;
    height: 8px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #38bdf8, #818cf8);
    border-radius: 9999px;
}

/* Toast alert */
.toast-msg {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: #10b981;
    color: #fff;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-msg.show {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }
    .hero-title {
        font-size: 1.75rem;
    }
    .search-form {
        flex-direction: column;
    }
    .data-table thead {
        display: none;
    }
    .data-table, .data-table tbody, .data-table tr, .data-table td {
        display: block;
        width: 100%;
    }
    .data-table tr {
        margin-bottom: 0.75rem;
        border-bottom: 2px solid var(--border);
        padding: 0.5rem;
    }
    .data-table td {
        padding: 0.4rem 0.5rem;
        border-bottom: none;
    }
}