/* ==========================================================================
   NUPRC File Management — Design System & Theme Engine (Light & Dark)
   ========================================================================== */

:root, [data-bs-theme="light"] {
    --portal-primary: #025416;
    --portal-primary-hover: #013e10;
    --portal-primary-subtle: #ecfdf5;
    --portal-primary-text: #025416;
    --portal-surface: #ffffff;
    --portal-bg: #f8fafc;
    --portal-border: #e2e8f0;
    --portal-text: #0f172a;
    --portal-muted: #64748b;
    --portal-card-bg: #ffffff;
    --portal-sidebar-bg: #ffffff;
    --portal-sidebar-hover: #f1f5f9;
    --portal-sidebar-link: #475569;
    --portal-sidebar-active: #ecfdf5;
    --portal-table-head-bg: #f8fafc;
    --portal-table-head-color: #64748b;
    --portal-banner-bg: linear-gradient(135deg, #f8fbf9 0%, #edf7f0 100%);
    --portal-banner-border: #025416;
    --portal-modal-bg: #ffffff;
    --portal-input-bg: #ffffff;
    --portal-input-border: #cbd5e1;
    --portal-input-text: #0f172a;
    --portal-badge-bg: #f1f5f9;
    --portal-badge-text: #334155;
    --portal-code-bg: #f8fafc;
    --portal-dropdown-bg: #ffffff;
    --portal-dropdown-hover: #f1f5f9;
}

[data-bs-theme="dark"] {
    --portal-primary: #10b981;
    --portal-primary-hover: #059669;
    --portal-primary-subtle: rgba(16, 185, 129, 0.15);
    --portal-primary-text: #34d399;
    --portal-surface: #1e293b;
    --portal-bg: #0f172a;
    --portal-border: #334155;
    --portal-text: #f8fafc;
    --portal-muted: #94a3b8;
    --portal-card-bg: #1e293b;
    --portal-sidebar-bg: #1e293b;
    --portal-sidebar-hover: #334155;
    --portal-sidebar-link: #cbd5e1;
    --portal-sidebar-active: rgba(16, 185, 129, 0.18);
    --portal-table-head-bg: #1e293b;
    --portal-table-head-color: #94a3b8;
    --portal-banner-bg: linear-gradient(135deg, #132e1d 0%, #0d2114 100%);
    --portal-banner-border: #10b981;
    --portal-modal-bg: #1e293b;
    --portal-input-bg: #0f172a;
    --portal-input-border: #475569;
    --portal-input-text: #f8fafc;
    --portal-badge-bg: #334155;
    --portal-badge-text: #e2e8f0;
    --portal-code-bg: #0f172a;
    --portal-dropdown-bg: #1e293b;
    --portal-dropdown-hover: #334155;
}

html, body {
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--portal-bg);
    color: var(--portal-text);
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* Header & Navigation (Fixed / Non-scrolling) */
.navbar-custom {
    flex-shrink: 0;
    background: linear-gradient(135deg, #025416 0%, #01380e 100%);
    z-index: 1030;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
}

.navbar-brand-custom {
    font-weight: 800;
    color: #ffffff !important;
    letter-spacing: -0.02em;
}

/* Middle Layout Area (Fixed container between header and footer) */
.main-layout-wrapper {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: row;
    overflow: hidden;
    width: 100%;
}

/* Sidebar (Fixed in place / Non-scrolling with page) */
.sidebar-custom {
    width: 260px;
    min-width: 260px;
    max-width: 260px;
    background-color: var(--portal-sidebar-bg) !important;
    border-color: var(--portal-border) !important;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    flex-shrink: 0;
    transition: background-color 0.25s ease, border-color 0.25s ease;
}

/* Main Content (The ONLY element that scrolls!) */
.main-content-custom {
    flex: 1 1 auto;
    width: calc(100% - 260px);
    height: 100%;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 767.98px) {
    .main-content-custom {
        width: 100%;
    }
}

/* Custom Sleek Scrollbars */
.main-content-custom::-webkit-scrollbar,
.sidebar-custom::-webkit-scrollbar,
.upload-preview-list::-webkit-scrollbar,
.preview-code-box::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.main-content-custom::-webkit-scrollbar-track,
.sidebar-custom::-webkit-scrollbar-track,
.upload-preview-list::-webkit-scrollbar-track,
.preview-code-box::-webkit-scrollbar-track {
    background: transparent;
}

.main-content-custom::-webkit-scrollbar-thumb,
.sidebar-custom::-webkit-scrollbar-thumb,
.upload-preview-list::-webkit-scrollbar-thumb,
.preview-code-box::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, 0.25);
    border-radius: 4px;
}

.main-content-custom::-webkit-scrollbar-thumb:hover,
.sidebar-custom::-webkit-scrollbar-thumb:hover,
.upload-preview-list::-webkit-scrollbar-thumb:hover,
.preview-code-box::-webkit-scrollbar-thumb:hover {
    background: rgba(100, 116, 139, 0.45);
}

[data-bs-theme="dark"] .main-content-custom::-webkit-scrollbar-thumb,
[data-bs-theme="dark"] .sidebar-custom::-webkit-scrollbar-thumb,
[data-bs-theme="dark"] .upload-preview-list::-webkit-scrollbar-thumb,
[data-bs-theme="dark"] .preview-code-box::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.25);
}

[data-bs-theme="dark"] .main-content-custom::-webkit-scrollbar-thumb:hover,
[data-bs-theme="dark"] .sidebar-custom::-webkit-scrollbar-thumb:hover,
[data-bs-theme="dark"] .upload-preview-list::-webkit-scrollbar-thumb:hover,
[data-bs-theme="dark"] .preview-code-box::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.45);
}

/* Footer (Fixed Dock at bottom) */
.footer-custom {
    flex-shrink: 0;
    background-color: var(--portal-surface);
    border-top: 1px solid var(--portal-border) !important;
    color: var(--portal-muted);
    z-index: 1020;
    transition: background-color 0.25s ease, border-color 0.25s ease;
}

[data-bs-theme="dark"] .footer-custom {
    background-color: #1e293b;
    border-top-color: #334155 !important;
}

.font-monospace {
    font-family: 'JetBrains Mono', monospace !important;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1rem;
    color: var(--portal-sidebar-link);
    font-weight: 600;
    font-size: 0.88rem;
    border-radius: 0.6rem;
    text-decoration: none;
    transition: all 0.15s ease-in-out;
    margin-bottom: 0.25rem;
}

.sidebar-link:hover {
    background-color: var(--portal-sidebar-hover);
    color: var(--portal-primary);
}

.sidebar-link.active {
    background-color: var(--portal-sidebar-active);
    color: var(--portal-primary-text);
    font-weight: 700;
    border-left: 3px solid var(--portal-primary);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 20px;
    background-color: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #ffffff !important;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.theme-toggle-btn:hover {
    background-color: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.45);
}

/* Cards & Surfaces */
.card-custom {
    background-color: var(--portal-card-bg);
    border: 1px solid var(--portal-border) !important;
    border-radius: 1rem;
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.05);
    color: var(--portal-text);
    transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.2s ease;
}

[data-bs-theme="dark"] .card-custom {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.storage-banner-custom {
    background: var(--portal-banner-bg) !important;
    border-left: 4px solid var(--portal-banner-border) !important;
    border-radius: 1rem;
}

/* Buttons */
.btn-portal-primary {
    background-color: var(--portal-primary);
    border-color: var(--portal-primary);
    color: #ffffff !important;
    font-weight: 600;
    border-radius: 0.6rem;
    transition: all 0.2s ease;
}

.btn-portal-primary:hover {
    background-color: var(--portal-primary-hover);
    border-color: var(--portal-primary-hover);
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(2, 84, 22, 0.3);
}

[data-bs-theme="dark"] .btn-portal-primary {
    color: #022c0e !important;
    font-weight: 700;
}

[data-bs-theme="dark"] .btn-portal-primary:hover {
    color: #022c0e !important;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

/* File Cards */
.file-card {
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    cursor: pointer;
    background-color: var(--portal-surface);
    border-color: var(--portal-border) !important;
}

.file-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
    border-color: var(--portal-primary) !important;
}

.file-card.selected {
    border-color: var(--portal-primary) !important;
    background-color: var(--portal-sidebar-active) !important;
}

/* Tables & Headings */
[data-bs-theme="dark"] .table {
    --bs-table-bg: var(--portal-card-bg);
    --bs-table-color: var(--portal-text);
    --bs-table-border-color: var(--portal-border);
    --bs-table-hover-bg: #273549;
    --bs-table-hover-color: var(--portal-text);
}

.table-head-custom th {
    background-color: var(--portal-table-head-bg) !important;
    color: var(--portal-table-head-color) !important;
    border-bottom: 1px solid var(--portal-border) !important;
}

/* Modals */
.modal-content {
    background-color: var(--portal-modal-bg);
    color: var(--portal-text);
    border: 1px solid var(--portal-border);
}

/* Form Controls */
[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background-color: var(--portal-input-bg);
    border-color: var(--portal-input-border);
    color: var(--portal-input-text);
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    background-color: var(--portal-input-bg);
    border-color: var(--portal-primary);
    color: var(--portal-input-text);
    box-shadow: 0 0 0 0.25rem rgba(16, 185, 129, 0.25);
}

[data-bs-theme="dark"] .input-group-text {
    background-color: #1e293b;
    border-color: var(--portal-input-border);
    color: var(--portal-muted);
}

/* Dropdowns */
.dropdown-menu {
    background-color: var(--portal-dropdown-bg);
    border: 1px solid var(--portal-border);
    color: var(--portal-text);
}

.dropdown-item {
    color: var(--portal-text);
}

.dropdown-item:hover {
    background-color: var(--portal-dropdown-hover);
    color: var(--portal-primary);
}

/* Badges & Text Adaptation */
[data-bs-theme="dark"] .text-dark {
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .text-secondary,
[data-bs-theme="dark"] .text-muted {
    color: #94a3b8 !important;
}

[data-bs-theme="dark"] .bg-light {
    background-color: #1e293b !important;
}

[data-bs-theme="dark"] .bg-white {
    background-color: #1e293b !important;
}

[data-bs-theme="dark"] .border {
    border-color: var(--portal-border) !important;
}

[data-bs-theme="dark"] .border-top {
    border-top-color: var(--portal-border) !important;
}

[data-bs-theme="dark"] .border-bottom {
    border-bottom-color: var(--portal-border) !important;
}

[data-bs-theme="dark"] .badge.bg-light {
    background-color: var(--portal-badge-bg) !important;
    color: var(--portal-badge-text) !important;
    border-color: var(--portal-border) !important;
}

/* ==========================================================================
   Drag & Drop Multiple File Upload Component
   ========================================================================== */
.upload-dropzone {
    border: 2px dashed var(--portal-border);
    border-radius: 12px;
    background-color: var(--portal-surface);
    padding: 28px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    user-select: none;
}

.upload-dropzone:hover {
    border-color: var(--portal-primary);
    background-color: var(--portal-primary-subtle);
}

.upload-dropzone.drag-active {
    border-color: var(--portal-primary) !important;
    background-color: var(--portal-primary-subtle) !important;
    transform: scale(1.01);
    box-shadow: 0 8px 24px rgba(2, 84, 22, 0.15);
}

[data-bs-theme="dark"] .upload-dropzone.drag-active {
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.25);
}

.upload-dropzone-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--portal-primary-subtle);
    color: var(--portal-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 12px;
    transition: transform 0.2s ease;
}

.upload-dropzone:hover .upload-dropzone-icon {
    transform: translateY(-3px);
}

.upload-preview-list {
    max-height: 220px;
    overflow-y: auto;
    border: 1px solid var(--portal-border);
    border-radius: 10px;
    background-color: var(--portal-surface);
}

.upload-preview-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-bottom: 1px solid var(--portal-border);
    transition: background-color 0.15s ease;
}

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

.upload-preview-item:hover {
    background-color: var(--portal-sidebar-hover);
}

.upload-thumb-box {
    width: 38px;
    height: 38px;
    border-radius: 6px;
    object-fit: cover;
    background-color: var(--portal-primary-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--portal-primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.upload-remove-btn {
    border: none;
    background: transparent;
    color: var(--portal-muted);
    font-size: 1.1rem;
    padding: 2px 6px;
    border-radius: 4px;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.upload-remove-btn:hover {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
}

/* ==========================================================================
   Universal In-System File Preview Modal
   ========================================================================== */
.preview-canvas-box {
    background: repeating-conic-gradient(#f1f5f9 0% 25%, #ffffff 0% 50%) 50% / 20px 20px;
    border: 1px solid var(--portal-border);
    border-radius: 12px;
    min-height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

[data-bs-theme="dark"] .preview-canvas-box {
    background: repeating-conic-gradient(#0f172a 0% 25%, #1e293b 0% 50%) 50% / 20px 20px;
}

.preview-img-target {
    max-height: 520px;
    max-width: 100%;
    object-fit: contain;
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 6px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.preview-code-box {
    background-color: #0f172a;
    color: #38bdf8;
    border-radius: 10px;
    padding: 18px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.84rem;
    max-height: 520px;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.55;
    border: 1px solid #334155;
}

.preview-doc-card {
    padding: 48px 24px;
    text-align: center;
    background-color: var(--portal-surface);
    border: 1px solid var(--portal-border);
    border-radius: 12px;
}

.preview-doc-icon {
    width: 84px;
    height: 84px;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2.8rem;
    margin-bottom: 16px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}