/* ==========================================================================
   Document Preview Styles
   Clean, modern, responsive HTML previews for Office, PDF & Text documents
   ========================================================================== */

/* --- Modal Global Reset & Typography --- */
#filePreviewModal {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

#filePreviewModal .modal-content {
    background-color: #f8f9fa;
    border: none;
    overflow: hidden;
}

#filePreviewModal .modal-header {
    border-bottom: 1px solid #dee2e6;
    background: #ffffff;
    z-index: 20;
    min-height: 56px;
    padding: 0.6rem 1.25rem;
}

#filePreviewModal .modal-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1e293b;
    letter-spacing: 0.2px;
}

#filePreviewModal #previewFileIcon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

#filePreviewModal #previewFileBadge {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.4px;
    padding: 0.2rem 0.55rem;
    text-transform: uppercase;
    flex-shrink: 0;
}

/* Download Button in Modal Header */
.preview-download-btn {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
    font-size: 0.825rem !important;
    font-weight: 600 !important;
    height: 34px;
    padding: 0 0.85rem !important;
    border-radius: 20px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0.4rem !important;
    white-space: nowrap !important;
    transition: all 0.15s ease !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08) !important;
    line-height: 1 !important;
    background-color: var(--chiro-blue, #1d4e89) !important;
    border-color: var(--chiro-blue, #1d4e89) !important;
    color: #ffffff !important;
    text-decoration: none !important;
}

.preview-download-btn:hover {
    background-color: #163d6b !important;
    border-color: #163d6b !important;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(29, 78, 137, 0.25) !important;
    color: #ffffff !important;
}

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

.preview-download-btn i {
    font-size: 0.875rem;
    line-height: 1;
}

/* Close button vertical alignment & styling */
.preview-modal-close {
    margin: 0 !important;
    width: 34px !important;
    height: 34px !important;
    padding: 0 !important;
    border-radius: 50% !important;
    background-color: #f1f3f5 !important;
    opacity: 0.75 !important;
    transition: all 0.15s ease !important;
    background-size: 11px !important;
    background-position: center !important;
    box-sizing: border-box !important;
}

.preview-modal-close:hover {
    opacity: 1 !important;
    background-color: #e2e6ea !important;
    transform: scale(1.05);
}

.preview-modal-close:focus {
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25) !important;
    outline: none !important;
}

@media (max-width: 576px) {
    #filePreviewModal .modal-header {
        padding: 0.5rem 0.75rem;
    }
    .preview-download-btn {
        height: 32px;
        padding: 0 0.65rem !important;
        font-size: 0.8rem !important;
    }
    .preview-modal-close {
        width: 32px !important;
        height: 32px !important;
    }
}

@media (max-width: 420px) {
    .preview-download-text {
        display: none;
    }
    .preview-download-btn {
        width: 32px !important;
        padding: 0 !important;
        border-radius: 50% !important;
    }
}

/* --- Word Document Preview (docx-preview & fallback) --- */
#previewDocContainer {
    background-color: #4a4d50;
    overflow-x: auto !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    overscroll-behavior: contain;
    touch-action: pan-x pan-y pinch-zoom;
}

.docx-stage-sizer {
    min-width: 100%;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: safe center;
    justify-content: flex-start;
    margin: 0 auto;
    box-sizing: border-box;
    position: relative;
    padding: 1.5rem 1rem;
}

.docx-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    transform-origin: top left;
    box-sizing: border-box;
    position: relative;
}

.docx-wrapper {
    background: transparent;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: safe center;
    min-height: 100%;
    box-sizing: border-box;
    width: max-content;
    min-width: 100%;
}

.docx-wrapper > section.docx {
    background: #ffffff;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.25);
    margin-bottom: 2rem;
    box-sizing: border-box;
    position: relative;
    flex-shrink: 0;
    margin-left: auto !important;
    margin-right: auto !important;
}

/* Ensure highlights, marker colors, and text shading are clearly visible */
.docx-wrapper span[style*="background-color"],
.docx-paper span[style*="background-color"],
.docx-wrapper mark,
.docx-paper mark {
    border-radius: 2px;
    padding: 1px 2px;
}

/* Bullet points, summations, and list numbering symbols */
.docx-wrapper p[class*="-num-"]:before,
.docx-wrapper p[class*="-num-"]::before {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Segoe UI Symbol", "Apple Symbols", "Noto Sans Symbols", Arial, sans-serif !important;
    display: inline-block;
}

/* Responsive images and media in docx preview */
.docx-wrapper img, 
.docx-wrapper svg,
.docx-paper img {
    max-width: 100% !important;
    height: auto !important;
    object-fit: contain;
}

/* Responsive Table Wrapper */
.docx-table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 1rem 0;
}

.docx-table-responsive table,
.docx-wrapper table,
.docx-paper table {
    width: max-content;
    min-width: 100%;
    border-collapse: collapse;
}

/* Base typography */
.docx-wrapper p,
.docx-paper p,
.docx-wrapper li,
.docx-paper li {
    text-wrap: pretty;
    overflow-wrap: break-word;
    word-break: normal;
}

.docx-wrapper h1, .docx-wrapper h2, .docx-wrapper h3,
.docx-wrapper h4, .docx-wrapper h5, .docx-wrapper h6,
.docx-paper h1, .docx-paper h2, .docx-paper h3,
.docx-paper h4, .docx-paper h5, .docx-paper h6 {
    text-wrap: balance;
    overflow-wrap: break-word;
    word-break: normal;
}

@media (max-width: 768px) {
    .docx-stage-sizer {
        padding: 0.75rem 0.5rem !important;
    }
    
    .docx-wrapper > section.docx {
        margin-bottom: 1.25rem !important;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2) !important;
    }
}

.docx-preview-container {
    background-color: transparent;
    min-height: 100%;
    width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: safe center;
}

.docx-paper {
    background-color: #ffffff;
    color: #2b2f38;
    width: 794px;
    max-width: 100%;
    margin: 0 auto 2rem auto;
    padding: 3.5rem 3rem;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.22);
    border-radius: 4px;
    line-height: 1.65;
    font-size: 1.025rem;
    word-wrap: break-word;
    box-sizing: border-box;
    flex-shrink: 0;
    margin-left: auto !important;
    margin-right: auto !important;
}

@media (max-width: 768px) {
    .docx-paper {
        margin: 0 auto 1.5rem auto !important;
        padding: 2rem 1.5rem !important;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2) !important;
    }
}

.docx-paper h1, .docx-paper h2, .docx-paper h3, 
.docx-paper h4, .docx-paper h5, .docx-paper h6 {
    color: #1a202c;
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.docx-paper h1 { font-size: 1.85rem; border-bottom: 2px solid #e9ecef; padding-bottom: 0.5rem; }
.docx-paper h2 { font-size: 1.45rem; }
.docx-paper h3 { font-size: 1.25rem; }
.docx-paper h4 { font-size: 1.1rem; }

.docx-paper p {
    margin-bottom: 1rem;
}

.docx-paper img {
    max-width: 100% !important;
    height: auto !important;
    border-radius: 4px;
    margin: 1.25rem auto;
    display: block;
}

.docx-paper table {
    width: 100% !important;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.docx-paper table, .docx-paper th, .docx-paper td {
    border: 1px solid #dee2e6;
}

.docx-paper th {
    background-color: #f8f9fa;
    font-weight: 600;
    padding: 0.65rem 0.85rem;
}

.docx-paper td {
    padding: 0.55rem 0.85rem;
}

.docx-paper ul, .docx-paper ol {
    padding-left: 1.75rem;
    margin-bottom: 1.25rem;
}

.docx-paper li {
    margin-bottom: 0.4rem;
}

.docx-paper blockquote {
    border-left: 4px solid #0d6efd;
    padding-left: 1rem;
    margin-left: 0;
    color: #495057;
    font-style: italic;
}

/* --- PDF Document Preview (PDF.js Canvas) --- */
.pdf-preview-wrapper {
    background: transparent;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: safe center;
    min-height: 100%;
    box-sizing: border-box;
    width: max-content;
    min-width: 100%;
}

.pdf-pages-container {
    display: flex;
    flex-direction: column;
    align-items: safe center;
    width: 100%;
}

.pdf-page-card {
    background: #ffffff;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.25);
    margin-bottom: 1.75rem;
    box-sizing: border-box;
    position: relative;
    flex-shrink: 0;
    border-radius: 2px;
    overflow: hidden;
    margin-left: auto !important;
    margin-right: auto !important;
}

.pdf-page-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

@media (max-width: 768px) {
    .pdf-preview-wrapper {
        padding: 1rem 0.5rem !important;
        background: #4a4d50 !important;
    }

    .pdf-page-card {
        margin-bottom: 1.25rem !important;
        box-shadow: 0 3px 14px rgba(0, 0, 0, 0.2) !important;
    }
}

/* --- Excel Spreadsheet Preview --- */
.excel-preview-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: #f8f9fa;
    position: relative;
    overflow: hidden;
}

/* Two-row toolbar: tabs on top, search bar below */
.excel-toolbar {
    background: #ffffff;
    border-bottom: 1px solid #dee2e6;
    flex-shrink: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
}

/* ── Row 1: Sheet-tab carousel ── */
.excel-tabs-row {
    padding: 0.55rem 1rem 0;
    overflow: hidden;
    border-bottom: 1px solid #f0f2f4;
}

.excel-tab-carousel {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    scrollbar-width: none;          /* Firefox */
    -ms-overflow-style: none;       /* IE */
    padding-bottom: 0.55rem;
}

.excel-tab-carousel::-webkit-scrollbar {
    display: none;
}

.excel-tab-btn {
    scroll-snap-align: start;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    font-weight: 500;
    line-height: 1;
    padding: 0.3rem 0.75rem;
    height: 28px;
    border-radius: 20px;
    border: 1.5px solid #dee2e6;
    background: #f8f9fa;
    color: #495057;
    white-space: nowrap;
    cursor: pointer;
    transition: background 0.13s ease, border-color 0.13s ease, color 0.13s ease, box-shadow 0.13s ease;
    flex-shrink: 0;
}

.excel-tab-btn:hover {
    background: #e9ecef;
    border-color: #ced4da;
    color: #212529;
}

.excel-tab-btn.active {
    background: #198754;
    border-color: #198754;
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(25, 135, 84, 0.3);
}

.excel-tab-btn i {
    font-size: 0.8rem;
    opacity: 0.8;
}

.excel-tab-btn.active i {
    opacity: 1;
}

.excel-tab-label {
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Row 2: Search bar ── */
.excel-search-row {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.45rem 1rem;
}

.excel-search-wrap {
    flex: 1 1 auto;
    max-width: 260px;
}

.excel-search-icon {
    position: absolute;
    left: 0.65rem;
    top: 50%;
    transform: translateY(-50%);
    color: #adb5bd;
    font-size: 0.8rem;
    pointer-events: none;
}

.excel-search-input {
    padding-left: 1.85rem !important;
    font-size: 0.825rem !important;
    height: 30px !important;
    border-color: #dee2e6 !important;
}

.excel-search-input:focus {
    border-color: #86b7fe !important;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15) !important;
}

.excel-table-scroll {
    flex: 1 1 auto;
    overflow: auto;
    position: relative;
    background: #eef1f5;
    padding: 0.75rem;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x pan-y pinch-zoom;
    transform-origin: top left;
}

.excel-table {
    border-collapse: collapse !important;
    border-spacing: 0;
    font-size: 0.84rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    width: max-content;
    margin: 0;
    background: #ffffff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    border-radius: 4px;
}

.excel-table th, .excel-table td {
    border: 1px solid #dcdfe6 !important;
    padding: 0.45rem 0.75rem !important;
    min-width: 65px;
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: middle;
    color: #212529;
    box-sizing: border-box;
}

/* First row is header row: styled like Excel column header */
.excel-table tr:first-child td,
.excel-table tr:first-child th {
    background-color: #e9ecef !important;
    font-weight: 600 !important;
    color: #343a40 !important;
    position: sticky;
    top: 0;
    z-index: 5;
    border-bottom: 2px solid #ced4da !important;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.excel-table tr:nth-child(even):not(:first-child) td {
    background-color: #f8fafc;
}

.excel-table tr:hover td {
    background-color: #e8f4fd !important;
}

/* Expanded cell when tapped on mobile */
.excel-table td.cell-expanded {
    white-space: normal !important;
    max-width: none !important;
    background-color: #fff9db !important;
    word-break: break-word;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 2;
    position: relative;
}

/* --- Floating Zoom & Page Navigation Toolbar --- */
.preview-zoom-toolbar {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(33, 37, 41, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 6px 12px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 1055;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.18);
    user-select: none;
    max-width: 95vw;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.preview-zoom-toolbar .preview-page-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.preview-zoom-toolbar .toolbar-separator {
    width: 1px;
    height: 18px;
    background: rgba(255, 255, 255, 0.25);
    margin: 0 4px;
}

.preview-zoom-toolbar .zoom-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    font-size: 1.1rem;
    line-height: 1;
    transition: background 0.15s ease, transform 0.1s ease;
}

.preview-zoom-toolbar .zoom-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    color: #ffffff;
}

.preview-zoom-toolbar .zoom-btn:active {
    transform: scale(0.92);
}

.preview-zoom-toolbar .zoom-btn-label {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 600;
    min-width: 54px;
    text-align: center;
    padding: 4px 10px;
    letter-spacing: 0.3px;
    border-radius: 20px;
}

.preview-zoom-toolbar .zoom-btn-label:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

@media (max-width: 768px) {
    .preview-zoom-toolbar {
        bottom: 12px;
        padding: 5px 8px;
        gap: 4px;
    }

    .preview-zoom-toolbar .zoom-btn {
        width: 30px;
        height: 30px;
        font-size: 0.95rem;
    }

    .preview-zoom-toolbar .zoom-btn-label {
        font-size: 0.78rem;
        min-width: 48px;
        padding: 3px 6px;
    }
}

/* --- PowerPoint Presentation Preview --- */
.pptx-preview-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: #18191c;
    color: #f8f9fa;
}

.pptx-toolbar {
    background: #232529;
    border-bottom: 1px solid #34373d;
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    gap: 0.5rem;
}

.pptx-stage {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 1rem;
    position: relative;
    user-select: none;
    touch-action: pan-y;
}

@media (max-width: 768px) {
    .pptx-stage {
        padding: 0.5rem;
    }
}

.pptx-canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    background: #ffffff;
    border-radius: 6px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
    transition: transform 0.15s ease;
}

.pptx-thumb-strip {
    background: #141517;
    border-top: 1px solid #2b2d33;
    padding: 0.6rem 1rem;
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    flex-shrink: 0;
}

.pptx-thumb-btn {
    cursor: pointer;
    border-radius: 6px;
    border: 2px solid transparent;
    padding: 0.25rem 0.6rem;
    background: #2a2d33;
    color: #ced4da;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all 0.15s ease;
}

.pptx-thumb-btn:hover {
    background: #373b42;
    color: #ffffff;
}

.pptx-thumb-btn.active {
    border-color: #0d6efd;
    background: #0d6efd;
    color: #ffffff;
    font-weight: bold;
}

/* --- Plain Text / Code Preview --- */
.text-preview-container {
    background: #ffffff;
    height: 100%;
    padding: 1.5rem;
    overflow: auto;
}

.text-preview-code {
    font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    color: #212529;
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
}

/* Error Fallback Card */
#previewError {
    z-index: 20;
}