:root {
  /* Default: Light Theme */
  --bg-primary: #f8fafc;
  --bg-sidebar: rgba(255, 255, 255, 0.75);
  --bg-navbar: rgba(255, 255, 255, 0.75);
  --bg-card: rgba(255, 255, 255, 0.8);
  --border-color: rgba(0, 0, 0, 0.08);
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --accent-primary: #6366f1;
  --accent-hover: #4f46e5;
  --accent-bg: rgba(99, 102, 241, 0.08);
  --accent-border: rgba(99, 102, 241, 0.15);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --glass-blur: blur(12px) saturate(190%);
  
  /* Bootstrap overrides */
  --bs-body-color: var(--text-primary);
  --bs-body-bg: var(--bg-primary);
  --bs-secondary-color: var(--text-secondary);
  --bs-secondary-rgb: 100, 116, 139;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0b0f19;
    --bg-sidebar: rgba(17, 24, 39, 0.7);
    --bg-navbar: rgba(11, 15, 25, 0.7);
    --bg-card: rgba(22, 30, 49, 0.65);
    --border-color: rgba(255, 255, 255, 0.06);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #818cf8;
    --accent-hover: #6366f1;
    --accent-bg: rgba(129, 140, 248, 0.12);
    --accent-border: rgba(129, 140, 248, 0.25);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px -1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    
    /* Bootstrap overrides for dark mode */
    --bs-secondary-rgb: 148, 163, 184;
  }
}

html {
    scrollbar-color: var(--border-color) var(--bg-primary);
}

@supports not (scrollbar-color: auto) {
  html::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  html::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
  }
  html::-webkit-scrollbar-track {
    background: var(--bg-primary);
  }
}

body {
    padding-top: 56px;
    background-color: var(--bg-primary) !important;
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Glassmorphism overrides for Navbar */
.navbar {
    background-color: var(--bg-navbar) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color) !important;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar-brand, .navbar-brand i {
    color: var(--text-primary) !important;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
}

.navbar-nav .nav-link:hover {
    color: var(--text-primary) !important;
}

/* Sidebar Styling */
.sidebar {
    position: fixed;
    top: 56px;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 20px 0 0;
    box-shadow: var(--shadow-sm) !important;
    background-color: var(--bg-sidebar) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--border-color) !important;
    overflow-y: auto;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

@media (max-width: 767.98px) {
    .sidebar {
        position: static;
        display: none;
    }
    .sidebar.show {
        display: block;
    }

    #topNavbar.collapse.show {
        background-color: var(--bg-navbar) !important;
        backdrop-filter: var(--glass-blur);
        -webkit-backdrop-filter: var(--glass-blur);
        padding: 1rem;
        border-bottom: 1px solid var(--border-color) !important;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        z-index: 1050;
    }

    #topNavbar .mx-auto.w-50 {
        width: 100% !important;
        margin-bottom: 1rem;
    }
}

.sidebar .nav-link {
    font-weight: 500;
    color: var(--text-secondary) !important;
    padding: 0.6rem 1.5rem;
    border-radius: 0 25px 25px 0;
    margin-right: 10px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar .nav-link:hover {
    background-color: var(--accent-bg) !important;
    color: var(--accent-primary) !important;
}

.sidebar .nav-link.active {
    color: var(--accent-primary) !important;
    background-color: var(--accent-bg) !important;
    font-weight: 600;
}

.sidebar .nav-link i {
    margin-right: 12px;
    font-size: 1.1rem;
}

.main-content {
    margin-left: 240px;
    padding: 24px;
}

@media (max-width: 767.98px) {
    .main-content {
        margin-left: 0;
    }
}

/* Cards & Modals */
.card {
    background-color: var(--bg-card) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-sm) !important;
    color: var(--text-primary) !important;
    border-radius: 12px !important;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md) !important;
}

.modal-content {
    background-color: var(--bg-card) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-lg) !important;
    color: var(--text-primary) !important;
    border-radius: 16px !important;
}

.modal-header, .modal-footer {
    border-color: var(--border-color) !important;
}

/* Custom Lists & Tables */
.table {
    color: var(--text-primary) !important;
}

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

.table-light {
    --bs-table-bg: var(--bg-primary) !important;
    --bs-table-color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
}

.file-item {
    border-radius: 8px;
    transition: all 0.2s ease;
}

.file-item:hover {
    background-color: var(--accent-bg) !important;
    transform: translateX(4px);
}

.file-item a {
    color: var(--text-primary) !important;
    transition: color 0.2s ease;
}

.file-item a:hover {
    color: var(--accent-primary) !important;
}

/* Dropdowns overrides */
.dropdown-menu {
    background-color: var(--bg-card) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-lg) !important;
    color: var(--text-primary) !important;
    border-radius: 8px !important;
}

.dropdown-item {
    color: var(--text-primary) !important;
    padding: 0.6rem 1.25rem;
    font-size: 0.9rem;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.dropdown-item:hover {
    background-color: var(--accent-bg) !important;
    color: var(--accent-primary) !important;
}

.dropdown-item i {
    width: 1.2rem;
}

/* Modern Form Controls */
.form-control, .form-select {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: 8px !important;
    transition: all 0.2s ease;
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-card) !important;
    border-color: var(--accent-primary) !important;
    box-shadow: 0 0 0 3px var(--accent-border) !important;
    color: var(--text-primary) !important;
}

.input-group-text {
    background-color: var(--bg-primary) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-secondary) !important;
}

/* Touch targets for mobile */
@media (max-width: 767.98px) {
    .btn-link {
        padding: 10px;
    }

    .file-item {
        padding-top: 8px;
        padding-bottom: 8px;
    }

    .main-content {
        padding: 12px;
    }

    .container-fluid {
        padding-left: 12px;
        padding-right: 12px;
    }

    .btn-toolbar {
        flex-wrap: nowrap;
    }
}

.workspace-area {
    min-height: 400px;
    cursor: default;
}

#mobileFab {
    transition: transform 0.2s, background-color 0.2s;
}

#mobileFab:active {
    transform: scale(0.9);
}

#workspaceContextMenu {
    min-width: 180px;
}

/* Grid View Improvements */
.grid-item {
    position: relative;
    border-radius: 12px !important;
    overflow: hidden !important;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease, border-color 0.3s ease;
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    padding: 0 !important;
}

.grid-selection-checkbox {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 30;
    width: 1.25rem !important;
    height: 1.25rem !important;
    cursor: pointer;
    background-color: var(--bg-card) !important;
    border: 2px solid var(--border-color) !important;
}

.grid-selection-checkbox:checked {
    background-color: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
}

.grid-item:hover, .grid-item:focus-within {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-lg) !important;
    z-index: 50;
    border-color: var(--accent-primary) !important;
}

.grid-thumbnail-wrapper {
    position: relative;
    width: 100%;
    padding-top: 100%; /* 1:1 Aspect Ratio */
    background: var(--bg-primary) !important;
}

.grid-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.grid-item:hover .grid-thumbnail {
    transform: scale(1.05);
}

.grid-icon-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.grid-file-info {
    background: var(--bg-card) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    color: var(--text-primary) !important;
    padding: 10px 12px;
    font-size: 0.85rem;
    font-weight: 500;
    position: absolute;
    bottom: 0;
    width: 100%;
    z-index: 10;
    border-top: 1px solid var(--border-color) !important;
}

.grid-file-info a {
    color: var(--text-primary) !important;
}

.grid-file-info .dropdown-menu {
    z-index: 1060;
}

.grid-download-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 20;
    opacity: 0;
    transition: opacity 0.2s;
}

.grid-item:hover .grid-download-overlay {
    opacity: 1;
}

.grid-download-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color) !important;
    transition: background 0.2s, color 0.2s, transform 0.2s;
}

.grid-download-btn:hover {
    background: var(--accent-primary) !important;
    color: white !important;
    transform: scale(1.1);
}

/* Buttons customizations */
.btn-primary {
    background-color: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
    color: white !important;
    border-radius: 20px !important;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--accent-hover) !important;
    border-color: var(--accent-hover) !important;
    box-shadow: 0 0 0 3px var(--accent-border) !important;
}

.btn-outline-secondary {
    color: var(--text-secondary) !important;
    border-color: var(--border-color) !important;
    transition: all 0.2s ease;
    border-radius: 20px !important;
}

.btn-outline-secondary:hover {
    background-color: var(--accent-bg) !important;
    color: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
}

/* Fix dropdown clipping in responsive tables */
.table-responsive {
    overflow: visible !important;
}

body.drag-over::after {
    content: "Drop files to upload";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(99, 102, 241, 0.15) !important;
    border: 4px dashed var(--accent-primary) !important;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-primary) !important;
    pointer-events: none;
}

@media (max-width: 767.98px) {
    .table-responsive {
        overflow: visible !important;
        overflow-x: visible !important;
        -webkit-overflow-scrolling: touch;
    }
}

/* Explicit text-muted & form-text overrides */
.text-muted, .text-secondary, .form-text {
    color: var(--text-secondary) !important;
    --bs-text-opacity: 1 !important;
}

/* Fix bg-white and bg-light overrides in dark mode */
@media (prefers-color-scheme: dark) {
    .bg-white {
        background-color: var(--bg-card) !important;
        color: var(--text-primary) !important;
    }
    .bg-light {
        background-color: var(--bg-primary) !important;
        color: var(--text-primary) !important;
    }
    .text-dark {
        color: var(--text-primary) !important;
    }
    .card-header.bg-white {
        background-color: transparent !important;
        border-bottom: 1px solid var(--border-color) !important;
    }
}

/* Explicit style overrides for file inputs and switch checkboxes */
.form-control::file-selector-button {
    background-color: var(--bg-primary) !important;
    color: var(--text-primary) !important;
    border: none;
    border-right: 1px solid var(--border-color) !important;
    padding: 0.375rem 0.75rem;
    margin-top: -0.375rem;
    margin-bottom: -0.375rem;
    margin-left: -0.75rem;
    margin-right: 0.75rem;
    transition: background-color 0.2s ease;
}

.form-control::file-selector-button:hover {
    background-color: var(--accent-bg) !important;
    color: var(--accent-primary) !important;
}

.form-check-input {
    background-color: var(--bg-primary) !important;
    border: 1.5px solid var(--text-secondary) !important;
    border-color: var(--text-secondary) !important;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-check-input:checked {
    background-color: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
}

.form-check-input:focus {
    border-color: var(--accent-primary) !important;
    box-shadow: 0 0 0 3px var(--accent-border) !important;
}