/* ============================================================
   SecureDrive - Complete Custom Stylesheet
   Google Drive style UI with dark/light theme support
   ============================================================ */

/* ============================================================
   CSS VARIABLES - Theme Colors
   ============================================================ */
:root {
    --sd-primary:        #4A90D9;
    --sd-primary-dark:   #2c6fad;
    --sd-primary-light:  #e8f1fb;
    --sd-secondary:      #6c757d;
    --sd-success:        #28a745;
    --sd-danger:         #dc3545;
    --sd-warning:        #ffc107;
    --sd-info:           #17a2b8;

    /* Light Theme */
    --sd-bg:             #f8f9fa;
    --sd-bg-card:        #ffffff;
    --sd-bg-sidebar:     #ffffff;
    --sd-bg-topbar:      #ffffff;
    --sd-bg-hover:       #f1f3f4;
    --sd-bg-selected:    #e8f1fb;

    --sd-text:           #202124;
    --sd-text-muted:     #5f6368;
    --sd-text-light:     #80868b;

    --sd-border:         #e0e0e0;
    --sd-border-light:   #f1f1f1;

    --sd-shadow:         0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
    --sd-shadow-hover:   0 4px 12px rgba(0,0,0,0.15);
    --sd-shadow-card:    0 2px 8px rgba(0,0,0,0.08);

    --sd-radius:         12px;
    --sd-radius-sm:      8px;
    --sd-radius-lg:      16px;

    --sd-sidebar-width:  260px;
    --sd-topbar-height:  64px;

    --sd-transition:     all 0.2s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --sd-bg:             #1a1a2e;
    --sd-bg-card:        #16213e;
    --sd-bg-sidebar:     #0f3460;
    --sd-bg-topbar:      #16213e;
    --sd-bg-hover:       #1e2a45;
    --sd-bg-selected:    #1a3a5c;

    --sd-text:           #e8eaed;
    --sd-text-muted:     #9aa0a6;
    --sd-text-light:     #6c7278;

    --sd-border:         #2d3748;
    --sd-border-light:   #1e2a3a;

    --sd-shadow:         0 1px 3px rgba(0,0,0,0.4);
    --sd-shadow-hover:   0 4px 12px rgba(0,0,0,0.5);
    --sd-shadow-card:    0 2px 8px rgba(0,0,0,0.3);
}

/* ============================================================
   GLOBAL RESET & BASE
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html { font-size: 15px; scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--sd-bg);
    color: var(--sd-text);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

a {
    color: var(--sd-primary);
    text-decoration: none;
    transition: var(--sd-transition);
}
a:hover { color: var(--sd-primary-dark); }

/* ============================================================
   LAYOUT - Main Structure
   ============================================================ */
.sd-wrapper {
    display: flex;
    min-height: 100vh;
}

.sd-main {
    flex: 1;
    margin-left: var(--sd-sidebar-width);
    padding-top: var(--sd-topbar-height);
    min-height: 100vh;
    background: var(--sd-bg);
    transition: margin-left 0.3s ease;
}

.sd-content {
    padding: 24px;
    max-width: 1400px;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sd-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sd-sidebar-width);
    height: 100vh;
    background: var(--sd-bg-sidebar);
    border-right: 1px solid var(--sd-border);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    overflow-y: auto;
    transition: transform 0.3s ease, background 0.3s ease;
    box-shadow: var(--sd-shadow);
}

.sd-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--sd-border);
    text-decoration: none;
}

.sd-sidebar-brand .brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--sd-primary), var(--sd-primary-dark));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    flex-shrink: 0;
}

.sd-sidebar-brand .brand-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--sd-text);
    letter-spacing: -0.3px;
}

/* Upload Button in Sidebar */
.sd-upload-btn {
    margin: 16px;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--sd-primary), var(--sd-primary-dark));
    color: white !important;
    border: none;
    border-radius: var(--sd-radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--sd-transition);
    box-shadow: 0 2px 8px rgba(74,144,217,0.4);
    text-decoration: none;
    justify-content: center;
}

.sd-upload-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(74,144,217,0.5);
    color: white !important;
}

/* Sidebar Navigation */
.sd-nav {
    list-style: none;
    padding: 8px 0;
    flex: 1;
}

.sd-nav-section {
    padding: 12px 20px 4px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--sd-text-light);
}

.sd-nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--sd-text-muted);
    border-radius: 0 24px 24px 0;
    margin-right: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--sd-transition);
    text-decoration: none;
}

.sd-nav-item a:hover {
    background: var(--sd-bg-hover);
    color: var(--sd-text);
}

.sd-nav-item.active a {
    background: var(--sd-bg-selected);
    color: var(--sd-primary);
    font-weight: 600;
}

.sd-nav-item a i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

/* Storage Bar in Sidebar */
.sd-storage-info {
    padding: 16px;
    border-top: 1px solid var(--sd-border);
    margin-top: auto;
}

.sd-storage-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--sd-text-muted);
    margin-bottom: 6px;
    font-weight: 500;
}

.sd-storage-bar {
    height: 6px;
    background: var(--sd-border);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 6px;
}

.sd-storage-fill {
    height: 100%;
    border-radius: 10px;
    transition: width 0.5s ease;
}

.sd-storage-text {
    font-size: 0.75rem;
    color: var(--sd-text-light);
    text-align: center;
}

/* ============================================================
   TOPBAR
   ============================================================ */
.sd-topbar {
    position: fixed;
    top: 0;
    left: var(--sd-sidebar-width);
    right: 0;
    height: var(--sd-topbar-height);
    background: var(--sd-bg-topbar);
    border-bottom: 1px solid var(--sd-border);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    z-index: 999;
    transition: left 0.3s ease, background 0.3s ease;
    box-shadow: var(--sd-shadow);
}

.sd-search-box {
    flex: 1;
    max-width: 600px;
    position: relative;
}

.sd-search-box input {
    width: 100%;
    padding: 10px 16px 10px 42px;
    background: var(--sd-bg);
    border: 1px solid var(--sd-border);
    border-radius: 24px;
    font-size: 0.9rem;
    color: var(--sd-text);
    outline: none;
    transition: var(--sd-transition);
}

.sd-search-box input:focus {
    border-color: var(--sd-primary);
    box-shadow: 0 0 0 3px rgba(74,144,217,0.15);
    background: var(--sd-bg-card);
}

.sd-search-box .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--sd-text-muted);
    font-size: 1rem;
}

.sd-topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.sd-icon-btn {
    width: 38px;
    height: 38px;
    border: none;
    background: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sd-text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--sd-transition);
    text-decoration: none;
}

.sd-icon-btn:hover {
    background: var(--sd-bg-hover);
    color: var(--sd-text);
}

.sd-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--sd-primary), var(--sd-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    flex-shrink: 0;
}

/* ============================================================
   FILE GRID & CARDS
   ============================================================ */
.sd-file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.sd-file-card {
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius);
    padding: 16px;
    cursor: pointer;
    transition: var(--sd-transition);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
    user-select: none;
}

.sd-file-card:hover {
    border-color: var(--sd-primary);
    box-shadow: var(--sd-shadow-hover);
    transform: translateY(-2px);
    background: var(--sd-bg-hover);
}

.sd-file-card.selected {
    border-color: var(--sd-primary);
    background: var(--sd-bg-selected);
}

.sd-file-card .file-icon {
    font-size: 2.8rem;
    line-height: 1;
}

.sd-file-card .file-name {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--sd-text);
    word-break: break-word;
    max-width: 100%;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sd-file-card .file-size {
    font-size: 0.72rem;
    color: var(--sd-text-light);
}

.sd-file-card .file-menu {
    position: absolute;
    top: 8px;
    right: 8px;
    opacity: 0;
    transition: var(--sd-transition);
}

.sd-file-card:hover .file-menu { opacity: 1; }

/* ============================================================
   FILE LIST VIEW
   ============================================================ */
.sd-file-list {
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius);
    overflow: hidden;
}

.sd-file-list-header {
    display: grid;
    grid-template-columns: auto 1fr 120px 120px 100px;
    gap: 12px;
    padding: 10px 16px;
    background: var(--sd-bg);
    border-bottom: 1px solid var(--sd-border);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--sd-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sd-file-list-item {
    display: grid;
    grid-template-columns: auto 1fr 120px 120px 100px;
    gap: 12px;
    padding: 10px 16px;
    align-items: center;
    border-bottom: 1px solid var(--sd-border-light);
    transition: var(--sd-transition);
    cursor: pointer;
}

.sd-file-list-item:last-child { border-bottom: none; }

.sd-file-list-item:hover {
    background: var(--sd-bg-hover);
}

.sd-file-list-item .file-icon { font-size: 1.4rem; }

.sd-file-list-item .file-name {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--sd-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sd-file-list-item .file-meta {
    font-size: 0.78rem;
    color: var(--sd-text-muted);
}

/* ============================================================
   DRAG AND DROP UPLOAD ZONE
   ============================================================ */
.sd-drop-zone {
    border: 2px dashed var(--sd-border);
    border-radius: var(--sd-radius-lg);
    padding: 48px 24px;
    text-align: center;
    background: var(--sd-bg-card);
    transition: var(--sd-transition);
    cursor: pointer;
    position: relative;
}

.sd-drop-zone:hover,
.sd-drop-zone.drag-over {
    border-color: var(--sd-primary);
    background: var(--sd-primary-light);
}

.sd-drop-zone.drag-over {
    transform: scale(1.01);
}

.sd-drop-zone .drop-icon {
    font-size: 3rem;
    color: var(--sd-text-light);
    margin-bottom: 12px;
    transition: var(--sd-transition);
}

.sd-drop-zone:hover .drop-icon,
.sd-drop-zone.drag-over .drop-icon {
    color: var(--sd-primary);
    transform: scale(1.1);
}

.sd-drop-zone .drop-text {
    font-size: 1rem;
    color: var(--sd-text-muted);
    margin-bottom: 4px;
}

.sd-drop-zone .drop-subtext {
    font-size: 0.82rem;
    color: var(--sd-text-light);
}

.sd-drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

/* ============================================================
   UPLOAD PROGRESS
   ============================================================ */
.sd-upload-progress {
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius);
    padding: 16px;
    margin-top: 16px;
}

.sd-upload-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--sd-border-light);
}

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

.sd-upload-item .upload-name {
    flex: 1;
    font-size: 0.85rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sd-upload-item .upload-bar {
    flex: 2;
    height: 6px;
    background: var(--sd-border);
    border-radius: 10px;
    overflow: hidden;
}

.sd-upload-item .upload-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--sd-primary), var(--sd-primary-dark));
    border-radius: 10px;
    transition: width 0.3s ease;
}

.sd-upload-item .upload-status {
    font-size: 0.78rem;
    color: var(--sd-text-muted);
    white-space: nowrap;
    min-width: 60px;
    text-align: right;
}

/* ============================================================
   CARDS & PANELS
   ============================================================ */
.sd-card {
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius);
    box-shadow: var(--sd-shadow-card);
    overflow: hidden;
}

.sd-card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--sd-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.sd-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--sd-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sd-card-body { padding: 20px; }

/* ============================================================
   STAT CARDS (Dashboard)
   ============================================================ */
.sd-stat-card {
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--sd-transition);
    box-shadow: var(--sd-shadow-card);
}

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

.sd-stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--sd-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.sd-stat-icon.blue   { background: rgba(74,144,217,0.15); color: var(--sd-primary); }
.sd-stat-icon.green  { background: rgba(40,167,69,0.15);  color: var(--sd-success); }
.sd-stat-icon.orange { background: rgba(255,193,7,0.15);  color: var(--sd-warning); }
.sd-stat-icon.red    { background: rgba(220,53,69,0.15);  color: var(--sd-danger);  }

.sd-stat-info .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--sd-text);
    line-height: 1.2;
}

.sd-stat-info .stat-label {
    font-size: 0.8rem;
    color: var(--sd-text-muted);
    font-weight: 500;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.sd-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: var(--sd-radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--sd-transition);
    text-decoration: none;
    white-space: nowrap;
}

.sd-btn-primary {
    background: linear-gradient(135deg, var(--sd-primary), var(--sd-primary-dark));
    color: white;
    box-shadow: 0 2px 6px rgba(74,144,217,0.35);
}

.sd-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74,144,217,0.45);
    color: white;
}

.sd-btn-outline {
    background: transparent;
    border: 1.5px solid var(--sd-border);
    color: var(--sd-text-muted);
}

.sd-btn-outline:hover {
    border-color: var(--sd-primary);
    color: var(--sd-primary);
    background: var(--sd-primary-light);
}

.sd-btn-danger {
    background: linear-gradient(135deg, #dc3545, #b02a37);
    color: white;
    box-shadow: 0 2px 6px rgba(220,53,69,0.35);
}

.sd-btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(220,53,69,0.45);
    color: white;
}

.sd-btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* ============================================================
   FORMS
   ============================================================ */
.sd-form-group {
    margin-bottom: 18px;
}

.sd-form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--sd-text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.sd-form-control {
    width: 100%;
    padding: 11px 14px;
    background: var(--sd-bg);
    border: 1.5px solid var(--sd-border);
    border-radius: var(--sd-radius-sm);
    font-size: 0.9rem;
    color: var(--sd-text);
    outline: none;
    transition: var(--sd-transition);
}

.sd-form-control:focus {
    border-color: var(--sd-primary);
    background: var(--sd-bg-card);
    box-shadow: 0 0 0 3px rgba(74,144,217,0.12);
}

.sd-form-control::placeholder { color: var(--sd-text-light); }

.sd-form-control.is-invalid { border-color: var(--sd-danger); }
.sd-form-control.is-valid   { border-color: var(--sd-success); }

/* ============================================================
   ALERTS
   ============================================================ */
.alert-sd-success {
    background: rgba(40,167,69,0.1);
    border-color: rgba(40,167,69,0.3);
    color: #1a6b30;
}

.alert-sd-danger {
    background: rgba(220,53,69,0.1);
    border-color: rgba(220,53,69,0.3);
    color: #842029;
}

.alert-sd-warning {
    background: rgba(255,193,7,0.1);
    border-color: rgba(255,193,7,0.3);
    color: #856404;
}

.alert-sd-info {
    background: rgba(23,162,184,0.1);
    border-color: rgba(23,162,184,0.3);
    color: #0c5460;
}

[data-theme="dark"] .alert-sd-success { color: #75dd91; }
[data-theme="dark"] .alert-sd-danger  { color: #f1aeb5; }
[data-theme="dark"] .alert-sd-warning { color: #ffe69c; }
[data-theme="dark"] .alert-sd-info    { color: #9eeaf9; }

/* ============================================================
   MODALS
   ============================================================ */
.sd-modal .modal-content {
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius-lg);
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.sd-modal .modal-header {
    border-bottom: 1px solid var(--sd-border);
    padding: 18px 24px;
}

.sd-modal .modal-footer {
    border-top: 1px solid var(--sd-border);
    padding: 16px 24px;
}

.sd-modal .modal-title {
    font-weight: 600;
    color: var(--sd-text);
}

/* ============================================================
   TABLES (Admin Panel)
   ============================================================ */
.sd-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.sd-table th {
    padding: 10px 16px;
    background: var(--sd-bg);
    border-bottom: 2px solid var(--sd-border);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--sd-text-muted);
    text-align: left;
    white-space: nowrap;
}

.sd-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--sd-border-light);
    color: var(--sd-text);
    vertical-align: middle;
}

.sd-table tr:hover td { background: var(--sd-bg-hover); }
.sd-table tr:last-child td { border-bottom: none; }

/* ============================================================
   BADGES & TAGS
   ============================================================ */
.sd-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.sd-badge-success { background: rgba(40,167,69,0.12);  color: #28a745; }
.sd-badge-danger  { background: rgba(220,53,69,0.12);  color: #dc3545; }
.sd-badge-warning { background: rgba(255,193,7,0.12);  color: #d39e00; }
.sd-badge-info    { background: rgba(23,162,184,0.12); color: #17a2b8; }
.sd-badge-primary { background: rgba(74,144,217,0.12); color: var(--sd-primary); }

/* ============================================================
   LOGIN / AUTH PAGES
   ============================================================ */
.sd-auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 20px;
}

.sd-auth-card {
    background: white;
    border-radius: var(--sd-radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

[data-theme="dark"] .sd-auth-card {
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
}

.sd-auth-logo {
    text-align: center;
    margin-bottom: 28px;
}

.sd-auth-logo .logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--sd-primary), var(--sd-primary-dark));
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin-bottom: 12px;
    box-shadow: 0 8px 24px rgba(74,144,217,0.4);
}

.sd-auth-logo h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--sd-text);
    margin: 0;
}

.sd-auth-logo p {
    font-size: 0.88rem;
    color: var(--sd-text-muted);
    margin: 4px 0 0;
}

/* Password strength meter */
.sd-password-strength {
    height: 4px;
    border-radius: 4px;
    margin-top: 6px;
    transition: var(--sd-transition);
}

.strength-weak   { background: var(--sd-danger);  width: 25%; }
.strength-fair   { background: var(--sd-warning); width: 50%; }
.strength-good   { background: var(--sd-info);    width: 75%; }
.strength-strong { background: var(--sd-success); width: 100%; }

/* ============================================================
   BREADCRUMB
   ============================================================ */
.sd-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--sd-text-muted);
    flex-wrap: wrap;
    margin-bottom: 16px;
}

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

.sd-breadcrumb a:hover { color: var(--sd-primary); }

.sd-breadcrumb .separator {
    color: var(--sd-text-light);
    font-size: 0.75rem;
}

.sd-breadcrumb .current {
    color: var(--sd-text);
    font-weight: 600;
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.sd-empty-state {
    text-align: center;
    padding: 64px 24px;
    color: var(--sd-text-muted);
}

.sd-empty-state .empty-icon {
    font-size: 4rem;
    color: var(--sd-border);
    margin-bottom: 16px;
}

.sd-empty-state h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--sd-text-muted);
    margin-bottom: 8px;
}

.sd-empty-state p {
    font-size: 0.88rem;
    color: var(--sd-text-light);
    margin-bottom: 20px;
}

/* ============================================================
   CONTEXT MENU
   ============================================================ */
.sd-context-menu {
    position: fixed;
    background: var(--sd-bg-card);
    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius-sm);
    box-shadow: var(--sd-shadow-hover);
    z-index: 9999;
    min-width: 180px;
    overflow: hidden;
    animation: contextFadeIn 0.12s ease;
}

@keyframes contextFadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 1; transform: scale(1); }
}

.sd-context-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-size: 0.88rem;
    color: var(--sd-text);
    cursor: pointer;
    transition: var(--sd-transition);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.sd-context-menu-item:hover { background: var(--sd-bg-hover); }
.sd-context-menu-item.danger { color: var(--sd-danger); }
.sd-context-menu-divider {
    height: 1px;
    background: var(--sd-border);
    margin: 4px 0;
}

/* ============================================================
   ADMIN PANEL SPECIFIC
   ============================================================ */
.sd-admin-topbar {
    background: linear-gradient(135deg, #1a1a2e, #0f3460);
    color: white;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
}

.sd-admin-badge {
    background: rgba(255,193,7,0.2);
    color: #ffc107;
    border: 1px solid rgba(255,193,7,0.3);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================================
   SCROLLBAR STYLING
   ============================================================ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--sd-border);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--sd-text-light); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 992px) {
    .sd-sidebar {
        transform: translateX(-100%);
    }

    .sd-sidebar.open {
        transform: translateX(0);
    }

    .sd-main {
        margin-left: 0;
    }

    .sd-topbar {
        left: 0;
    }

    .sd-file-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .sd-file-list-header,
    .sd-file-list-item {
        grid-template-columns: auto 1fr 80px 80px;
    }
}

@media (max-width: 576px) {
    .sd-content { padding: 16px; }

    .sd-auth-card { padding: 28px 20px; }

    .sd-file-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 10px;
    }

    .sd-stat-card { padding: 14px; }
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cursor-pointer { cursor: pointer; }
.no-select { user-select: none; }

.gap-2  { gap: 8px; }
.gap-3  { gap: 12px; }

.overlay-spinner {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
}