/**
 * SOP Cloud - Unified Dark Theme CSS
 * Professional, clean, and functional design
 * Consolidated from: dark-theme.css, style.css, workspace.css, and inline styles
 */

/* ═══════════════════════════════════════════════════════════════════════════════
   CSS VARIABLES - DARK THEME (BASE)
   ═══════════════════════════════════════════════════════════════════════════════ */

:root[data-bs-theme="dark"],
[data-bs-theme="dark"],
:root {
    /* Bootstrap Dark Theme Colors - Improved Contrast */
    --bs-body-bg: #0a0d12;
    --bs-body-color: #f1f5f9;
    --bs-border-color: #334155;
    --bs-secondary-bg: #1e293b;
    --bs-tertiary-bg: #334155;
    
    /* Primary Colors - Gray tones for dark theme */
    --sop-primary: #9ca3af;
    --sop-primary-hover: #d1d5db;
    --sop-primary-light: #e5e7eb;
    --sop-primary-dark: #6b7280;
    
    /* Accent Colors */
    --sop-accent: #a8a8a8;
    --sop-accent-hover: #c0c0c0;
    --sop-success: #34d399;
    --sop-warning: #fbbf24;
    --sop-danger: #f87171;
    --sop-info: #94a3b8;
    
    /* Text Colors - High Contrast for Dark Theme */
    --sop-text-primary: #f1f5f9;
    --sop-text-secondary: #cbd5e1;
    --sop-text-muted: #94a3b8;
    --sop-text-link: #d1d5db;
    --sop-text-link-hover: #e5e7eb;
    
    /* Background Colors - Better Separation */
    --sop-bg-primary: #0a0d12;
    --sop-bg-secondary: #1e293b;
    --sop-bg-tertiary: #334155;
    --sop-bg-card: #1e293b;
    --sop-bg-hover: #475569;
    
    /* Gradients - Gray tones for navbar */
    --sop-gradient-primary: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --sop-gradient-navbar: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --sop-gradient-success: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    --sop-gradient-danger: linear-gradient(135deg, #ef4444 0%, #f59e0b 100%);
    
    /* Shadows */
    --sop-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --sop-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --sop-shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --sop-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --sop-shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    
    /* Borders */
    --sop-border-radius: 0.75rem;
    --sop-border-radius-sm: 0.5rem;
    --sop-border-radius-lg: 1rem;
    --sop-border-width: 1px;
    
    /* Transitions */
    --sop-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sop-transition-fast: all 0.15s ease;
    --sop-transition-slow: all 0.5s ease;
    
    /* Spacing */
    --sop-spacing-xs: 0.25rem;
    --sop-spacing-sm: 0.5rem;
    --sop-spacing-md: 1rem;
    --sop-spacing-lg: 1.5rem;
    --sop-spacing-xl: 2rem;
    
    /* Admin Panel */
    --admin-sidebar-width: 260px;
    --admin-sidebar-collapsed-width: 80px;
    --admin-header-height: 60px;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.7;
    color: var(--sop-text-primary);
    background: var(--sop-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    margin: 0;
    padding: 0;
}

/* Links - Gray tones for dark theme */
a {
    color: var(--sop-text-link);
    text-decoration: none;
    transition: var(--sop-transition);
    font-weight: 500;
}

a:hover {
    color: var(--sop-text-link-hover);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--sop-primary);
    outline-offset: 2px;
    border-radius: 2px;
}

a:visited {
    color: var(--sop-accent);
}

/* Navbar Links - Already defined above, this is override */

/* Dropdown Links */
.dropdown-item {
    color: var(--sop-text-primary) !important;
}

.dropdown-item:hover {
    color: var(--sop-text-link) !important;
    background: var(--sop-bg-hover);
}

/* Footer Links */
footer a {
    color: var(--sop-text-secondary);
}

footer a:hover {
    color: var(--sop-text-link);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--sop-text-primary);
    margin-bottom: var(--sop-spacing-md);
    letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; font-weight: 800; }
h2 { font-size: 2rem; font-weight: 700; }
h3 { font-size: 1.75rem; font-weight: 700; }
h4 { font-size: 1.5rem; font-weight: 600; }
h5 { font-size: 1.25rem; font-weight: 600; }
h6 { font-size: 1rem; font-weight: 600; }

code, pre {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    background: var(--sop-bg-secondary);
    color: var(--sop-danger);
    padding: 0.2em 0.4em;
    border-radius: 0.25rem;
    font-size: 0.875em;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   LAYOUT COMPONENTS
   ═══════════════════════════════════════════════════════════════════════════════ */

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 20, 25, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease;
}

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

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--sop-bg-secondary);
    border-top: 4px solid var(--sop-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Page Progress Bar */
.page-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, #64748b 0%, #94a3b8 100%);
    z-index: 9998;
    transition: width 0.3s ease;
}

/* Navbar - Gray tones */
.navbar {
    background: var(--sop-gradient-navbar) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--sop-shadow-md);
    border-bottom: 1px solid var(--bs-border-color);
    padding: 0.75rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--sop-text-primary) !important;
    transition: var(--sop-transition);
    letter-spacing: -0.02em;
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--sop-primary-light) !important;
}

.navbar-nav .nav-link {
    font-weight: 500;
    position: relative;
    transition: var(--sop-transition);
    margin: 0 0.5rem;
    border-radius: var(--sop-border-radius);
    color: var(--sop-text-secondary) !important;
}

.navbar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--sop-text-primary) !important;
}

.navbar-nav .nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--sop-text-primary) !important;
}

/* Breadcrumbs */
.breadcrumb-container {
    background: var(--sop-bg-secondary);
    border-radius: var(--sop-border-radius);
    padding: var(--sop-spacing-md);
    margin-bottom: var(--sop-spacing-lg);
}

.breadcrumb {
    margin-bottom: 0;
    background: none;
    padding: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    font-weight: bold;
    color: var(--sop-text-muted);
}

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

.breadcrumb-item a:hover {
    color: var(--sop-text-link-hover);
    text-decoration: underline;
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
    padding-top: 2rem;
    padding-bottom: 2rem;
}

/* Footer */
footer {
    background: var(--sop-bg-secondary);
    color: var(--sop-text-primary);
    margin-top: auto;
    padding: 3rem 0 2rem;
}

footer h5,
footer h6 {
    color: var(--sop-text-primary);
    font-weight: 700;
    margin-bottom: var(--sop-spacing-md);
}

footer p,
footer span {
    color: var(--sop-text-secondary);
}

footer .container {
    border-top: 1px solid var(--bs-border-color);
}

/* Scroll to Top */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #475569 0%, #64748b 100%);
    color: white;
    border: 1px solid var(--bs-border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--sop-shadow);
    transition: var(--sop-transition);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--sop-shadow-lg);
}


/* ═══════════════════════════════════════════════════════════════════════════════
   CARDS & CONTAINERS
   ═══════════════════════════════════════════════════════════════════════════════ */

.card {
    background: var(--sop-bg-card);
    border: var(--sop-border-width) solid var(--bs-border-color);
    border-radius: var(--sop-border-radius);
    box-shadow: var(--sop-shadow);
    transition: var(--sop-transition);
}

.card:hover {
    box-shadow: var(--sop-shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background: var(--sop-bg-secondary);
    border-bottom: var(--sop-border-width) solid var(--bs-border-color);
    padding: var(--sop-spacing-lg);
    font-weight: 600;
    color: var(--sop-text-primary);
    border-radius: var(--sop-border-radius) var(--sop-border-radius) 0 0 !important;
}

.card-body {
    padding: var(--sop-spacing-lg);
}

/* Admin Cards */
.admin-card {
    background: var(--sop-bg-card);
    border-radius: var(--sop-border-radius);
    box-shadow: var(--sop-shadow);
    border: var(--sop-border-width) solid var(--bs-border-color);
    margin-bottom: var(--sop-spacing-lg);
}

.admin-card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: var(--sop-border-width) solid var(--bs-border-color);
    background: var(--sop-bg-secondary);
    color: var(--sop-text-primary);
    font-weight: 600;
    border-radius: var(--sop-border-radius) var(--sop-border-radius) 0 0;
}

.admin-card-body {
    padding: 1.5rem;
}

/* Stats Cards */
.stat-card {
    background: var(--sop-bg-card);
    border-radius: var(--sop-border-radius);
    padding: var(--sop-spacing-lg);
    box-shadow: var(--sop-shadow);
    border: var(--sop-border-width) solid var(--bs-border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--sop-shadow-md);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--sop-border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--sop-spacing-md);
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-card-label {
    color: var(--sop-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-card-value {
    color: var(--sop-text-primary);
}

/* Progress Container */
.progress-container {
    background: var(--sop-bg-secondary);
    border-radius: var(--sop-border-radius);
    padding: var(--sop-spacing-lg);
    margin: var(--sop-spacing-lg) 0;
    border: var(--sop-border-width) solid var(--bs-border-color);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════════════════════════════ */

.btn {
    border-radius: var(--sop-border-radius-sm);
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    transition: var(--sop-transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, #475569 0%, #64748b 100%);
    color: white;
    box-shadow: var(--sop-shadow-sm);
    border: 1px solid var(--bs-border-color);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #64748b 0%, #94a3b8 100%);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--sop-shadow);
    border-color: var(--sop-primary-light);
}

.btn-outline-primary {
    border: 2px solid var(--sop-primary);
    color: var(--sop-text-primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--sop-primary);
    color: white;
    transform: translateY(-1px);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(0);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   FORM ELEMENTS
   ═══════════════════════════════════════════════════════════════════════════════ */

.form-control,
.form-select {
    background: var(--sop-bg-secondary);
    border: var(--sop-border-width) solid var(--bs-border-color);
    color: var(--sop-text-primary);
    border-radius: var(--sop-border-radius-sm);
    padding: 0.625rem 1rem;
    transition: var(--sop-transition);
}

.form-control:focus,
.form-select:focus {
    background: var(--sop-bg-tertiary);
    border-color: var(--sop-primary);
    color: var(--sop-text-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

.form-control::placeholder {
    color: var(--sop-text-muted);
}

.form-label {
    color: var(--sop-text-primary);
    font-weight: 500;
    margin-bottom: var(--sop-spacing-sm);
}

.input-group-text {
    background: var(--sop-bg-secondary);
    border-color: var(--bs-border-color);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   TABLES & DATATABLES
   ═══════════════════════════════════════════════════════════════════════════════ */

.table {
    border-radius: var(--sop-border-radius-sm);
    overflow: hidden;
}

.table thead {
    background: var(--sop-bg-secondary);
}

.table thead th {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--sop-text-secondary);
    border-bottom: 2px solid var(--bs-border-color);
    background: var(--sop-bg-secondary);
}

.table tbody td {
    color: var(--sop-text-primary);
}

.table tbody tr {
    transition: background-color 0.2s ease;
}

.table tbody tr:hover {
    background-color: var(--sop-bg-hover);
}

.table-hover tbody tr:hover {
    background-color: var(--sop-bg-hover);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   UPLOAD ZONE
   ═══════════════════════════════════════════════════════════════════════════════ */

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

.upload-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s;
}

.upload-zone:hover {
    border-color: var(--sop-primary);
    background-color: var(--sop-bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--sop-shadow);
}

.upload-zone:hover::before {
    left: 100%;
}

.upload-zone.dragover {
    border-color: var(--sop-primary);
    background-color: var(--sop-bg-hover);
    border-style: solid;
    transform: scale(1.02);
    box-shadow: var(--sop-shadow-lg);
}

.upload-zone.uploading {
    pointer-events: none;
    opacity: 0.7;
}

.upload-zone.success {
    border-color: var(--sop-success);
    background-color: rgba(16, 185, 129, 0.05);
}

.upload-zone.error {
    border-color: var(--sop-danger);
    background-color: rgba(239, 68, 68, 0.05);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.upload-zone-compact {
    position: relative;
}

.upload-zone-compact > div {
    background: var(--sop-bg-secondary);
    border: 2px dashed var(--bs-border-color);
    border-radius: var(--sop-border-radius);
    transition: var(--sop-transition);
    cursor: pointer;
}

.upload-zone-compact > div:hover {
    border-color: var(--sop-primary);
    background: var(--sop-bg-tertiary);
    transform: translateY(-2px);
}

.upload-zone-compact > div.drag-over {
    border-color: var(--sop-primary);
    background: var(--sop-bg-tertiary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* File Items */
.file-item {
    border: 1px solid var(--bs-border-color);
    border-radius: var(--sop-border-radius);
    padding: var(--sop-spacing-md);
    margin-bottom: 0.5rem;
    background: var(--sop-bg-card);
    transition: var(--sop-transition);
}

.file-item:hover {
    border-color: var(--sop-primary);
    box-shadow: var(--sop-shadow);
    transform: translateY(-1px);
}

/* Drop Zone Overlay */
#drop-zone-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(59, 130, 246, 0.9);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

#drop-zone-overlay .content {
    text-align: center;
    color: white;
    font-size: 1.5rem;
}

#drop-zone-overlay .content i {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: block;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   PROGRESS BARS
   ═══════════════════════════════════════════════════════════════════════════════ */

.progress {
    height: 8px;
    background: var(--sop-bg-secondary);
    border-radius: var(--sop-border-radius);
    overflow: hidden;
    box-shadow: inset var(--sop-shadow-sm);
}

.progress-bar {
    background: linear-gradient(135deg, #64748b 0%, #94a3b8 100%);
    border-radius: var(--sop-border-radius);
    transition: width 0.6s ease;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progress-shimmer 2s infinite;
}

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

.progress-bar-striped {
    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
    background-size: 1rem 1rem;
}

.progress-bar-animated {
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    0% { background-position: 1rem 0; }
    100% { background-position: 0 0; }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   SPINNERS
   ═══════════════════════════════════════════════════════════════════════════════ */

.spinner-border {
    width: 2rem;
    height: 2rem;
    border-width: 0.25em;
    border-color: var(--sop-primary);
    border-right-color: transparent;
    animation: spinner-border 0.75s linear infinite;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.2em;
}

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}

.spinner-grow {
    width: 2rem;
    height: 2rem;
    background-color: var(--sop-primary);
    opacity: 0;
    animation: spinner-grow 0.75s linear infinite;
    border-radius: 50%;
}

.spinner-grow-sm {
    width: 1rem;
    height: 1rem;
}

@keyframes spinner-grow {
    0% { transform: scale(0); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: scale(1); opacity: 0; }
}

.spinner-pulse {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--sop-gradient-primary);
    animation: spinner-pulse 1.5s ease-in-out infinite;
}

@keyframes spinner-pulse {
    0%, 100% { transform: scale(0.8); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   BADGES & ALERTS
   ═══════════════════════════════════════════════════════════════════════════════ */

.badge {
    padding: 0.375rem 0.75rem;
    border-radius: var(--sop-border-radius-sm);
    font-weight: 500;
    font-size: 0.75rem;
}

.badge.bg-primary {
    background: var(--sop-gradient-primary) !important;
}

.badge.bg-success {
    background: var(--sop-success) !important;
}

.badge.bg-info {
    background: var(--sop-info) !important;
}

.alert {
    border-radius: var(--sop-border-radius);
    border: none;
    box-shadow: var(--sop-shadow);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--sop-success);
    border-left: 4px solid var(--sop-success);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--sop-danger);
    border-left: 4px solid var(--sop-danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--sop-warning);
    border-left: 4px solid var(--sop-warning);
}

.alert-info {
    background: rgba(6, 182, 212, 0.1);
    color: var(--sop-info);
    border-left: 4px solid var(--sop-info);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   ADMIN PANEL SPECIFIC
   ═══════════════════════════════════════════════════════════════════════════════ */

/* Admin Sidebar */
.admin-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--admin-sidebar-width);
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    color: #fff;
    z-index: 1000;
    transition: all 0.3s ease;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
}

.admin-sidebar.collapsed {
    width: var(--admin-sidebar-collapsed-width);
}

.admin-sidebar-header {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-sidebar-header h4 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
}

.admin-sidebar.collapsed .admin-sidebar-header h4 {
    display: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
}

.admin-sidebar-menu {
    padding: 1rem 0;
}

.sidebar-menu-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.sidebar-menu-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-left-color: var(--sop-primary);
}

.sidebar-menu-item.active {
    background: rgba(59, 130, 246, 0.2);
    color: #fff;
    border-left-color: var(--sop-primary);
}

.sidebar-menu-item i {
    width: 24px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.admin-sidebar.collapsed .sidebar-menu-item span {
    display: none;
}

.admin-sidebar.collapsed .sidebar-menu-item {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar-menu-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 0.5rem 1.5rem;
}

.admin-sidebar.collapsed .sidebar-menu-divider {
    margin: 0.5rem 1rem;
}

/* Disk Status Widget */
.disk-status-widget {
    margin: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-sidebar.collapsed .disk-status-widget {
    display: none;
}

.disk-status-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.disk-status-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.disk-status-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981 0%, #f59e0b 70%, #ef4444 100%);
    transition: width 0.3s ease;
}

.disk-status-text {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Admin Main Content */
.admin-main {
    margin-left: var(--admin-sidebar-width);
    transition: margin-left 0.3s ease;
    min-height: 100vh;
}

.admin-main.sidebar-collapsed {
    margin-left: var(--admin-sidebar-collapsed-width);
}

/* Admin Header */
.admin-header {
    height: var(--admin-header-height);
    background: var(--sop-bg-card);
    border-bottom: var(--sop-border-width) solid var(--bs-border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    box-shadow: var(--sop-shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

.admin-content {
    padding: 2rem;
}

/* Admin Sidebar Scrollbar */
.admin-sidebar::-webkit-scrollbar {
    width: 6px;
}

.admin-sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.admin-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.admin-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   MODALS & DROPDOWNS
   ═══════════════════════════════════════════════════════════════════════════════ */

.modal-content {
    border-radius: var(--sop-border-radius-lg);
    border: none;
    box-shadow: var(--sop-shadow-xl);
    background: var(--sop-bg-card);
}

.modal-header {
    border-bottom: var(--sop-border-width) solid var(--bs-border-color);
    padding: 1.5rem;
    background: var(--sop-bg-secondary);
    border-radius: var(--sop-border-radius-lg) var(--sop-border-radius-lg) 0 0;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: var(--sop-border-width) solid var(--bs-border-color);
    padding: 1.5rem;
}

.dropdown-menu {
    border-radius: var(--sop-border-radius-sm);
    border: var(--sop-border-width) solid var(--bs-border-color);
    box-shadow: var(--sop-shadow-md);
    padding: 0.5rem;
    background: var(--sop-bg-card);
}

.dropdown-item {
    border-radius: var(--sop-border-radius-sm);
    padding: 0.5rem 0.75rem;
    transition: all 0.2s ease;
    color: var(--sop-text-primary);
}

.dropdown-item:hover {
    background: var(--sop-bg-hover);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   PAGINATION
   ═══════════════════════════════════════════════════════════════════════════════ */

.pagination {
    gap: 0.25rem;
}

.page-link {
    border-radius: var(--sop-border-radius-sm);
    border: var(--sop-border-width) solid var(--bs-border-color);
    color: var(--sop-text-primary);
    transition: all 0.2s ease;
    background: var(--sop-bg-secondary);
}

.page-link:hover {
    background: var(--sop-bg-hover);
    border-color: var(--sop-primary);
    color: var(--sop-text-primary);
}

.page-item.active .page-link {
    background: var(--sop-primary);
    border-color: var(--sop-primary);
    color: white;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   LIST GROUPS
   ═══════════════════════════════════════════════════════════════════════════════ */

.list-group-item {
    background: var(--sop-bg-secondary);
    border-color: var(--bs-border-color);
    color: var(--sop-text-primary);
    transition: var(--sop-transition);
}

.list-group-item:hover {
    background: var(--sop-bg-hover);
    transform: translateX(4px);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════════════════════════════════ */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

.slide-in {
    animation: slideIn 0.3s ease;
}

.slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   UTILITIES
   ═══════════════════════════════════════════════════════════════════════════════ */

.text-muted {
    color: var(--sop-text-muted) !important;
}

.bg-light {
    background: var(--sop-bg-secondary) !important;
}

.border {
    border-color: var(--bs-border-color) !important;
}

.shadow-sm {
    box-shadow: var(--sop-shadow-sm) !important;
}

.text-primary {
    color: var(--sop-primary) !important;
}

/* Selection */
::selection {
    background: var(--sop-primary);
    color: white;
}

::-moz-selection {
    background: var(--sop-primary);
    color: white;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bs-border-color);
    border-radius: 5px;
}

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

/* Toast */
.toast {
    border: none;
    border-radius: var(--sop-border-radius);
    box-shadow: var(--sop-shadow-lg);
    background: var(--sop-bg-card);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--sop-text-muted);
}

.empty-state i {
    font-size: 4rem;
    opacity: 0.3;
    margin-bottom: 1rem;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .upload-zone {
        padding: 2rem 1rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .scroll-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
    
    main {
        padding-top: 1rem;
        padding-bottom: 1rem;
    }
    
    .card-body {
        padding: var(--sop-spacing-md);
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.show {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .upload-zone {
        padding: 1.5rem 0.75rem;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   PRINT STYLES
   ═══════════════════════════════════════════════════════════════════════════════ */

@media print {
    .navbar,
    .scroll-to-top,
    .progress-container,
    .admin-sidebar,
    .admin-header,
    .btn,
    .dropdown {
        display: none !important;
    }
    
    main {
        padding-top: 0;
    }
    
    .admin-main {
        margin-left: 0 !important;
    }
    
    .admin-card {
        box-shadow: none;
        border: 1px solid var(--bs-border-color);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   ACCESSIBILITY
   ═══════════════════════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}