:root {
    --transition-smooth: all 0.45s cubic-bezier(0.25, 1, 0.5, 1);
    --transition-fast: all 0.25s ease;
}

/* --------------------------------------------------------------------------
   FILTER TABS
   -------------------------------------------------------------------------- */
.download-tabs {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.download-tab-btn {
    padding: 0.65rem 1.5rem;
    background: #f8fafc;
    border: 1.5px solid #e2e8f0;
    border-radius: 100px;
    font-size: 0.88rem;
    font-weight: 700;
    color: #475569;
    cursor: pointer;
    transition: var(--transition-fast);
}

.download-tab-btn:hover {
    background: #ffffff;
    border-color: var(--primary);
    color: var(--primary);
}

.download-tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.3);
}

/* --------------------------------------------------------------------------
   BOOKLET DOCUMENT CARD DESIGN (VIEW ONLY)
   -------------------------------------------------------------------------- */
.download-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.25rem;
}

.download-doc-card {
    background: #ffffff;
    border: 1.5px solid #f1f5f9;
    border-radius: 28px;
    padding: 26px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.015);
    transition: transform 0.45s cubic-bezier(0.25, 1, 0.5, 1), box-shadow 0.45s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.download-doc-card-top {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), #3b82f6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.download-doc-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-border, #bfdbfe);
    box-shadow: 0 24px 48px rgba(var(--primary-rgb), 0.12), 0 8px 16px rgba(0, 0, 0, 0.04);
}

.download-doc-card:hover .download-doc-card-top {
    transform: scaleX(1);
}

/* Card Header row with badges */
.download-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.doc-category-badge {
    font-size: 0.72rem;
    font-weight: 750;
    color: var(--primary);
    background: rgba(var(--primary-rgb), 0.08);
    padding: 4px 12px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.doc-file-type {
    font-size: 0.65rem;
    color: #ffffff;
    background: var(--primary); /* View Blue */
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

/* Document Visual Preview Box */
.download-doc-visual-wrap {
    width: 100%;
    height: 220px;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 18px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
}

.download-doc-visual-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    display: block;
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    user-select: none;
    -webkit-user-drag: none;
}

/* For format icons (pdf, doc, video icons), use clean centered display */
.download-doc-visual-wrap img[src*="document-icons"] {
    width: 76px;
    height: 76px;
    object-fit: contain;
}

.download-doc-card:hover .download-doc-visual-wrap img {
    transform: scale(1.05);
}

/* ── Video thumbnail element inside card ── */
.download-doc-visual-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    display: block;
    pointer-events: none; /* card click handles viewer open */
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    user-select: none;
}

.download-doc-card:hover .download-doc-visual-video {
    transform: scale(1.05);
}

/* Icon fallback when video fails to load */
.download-doc-visual-icon-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
}

.download-doc-visual-icon-fallback img {
    width: 72px;
    height: 72px;
    object-fit: contain;
}

/* Play badge overlay on video cards */
.download-doc-video-play-badge {
    position: absolute;
    bottom: 10px;
    left: 10px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(var(--primary-rgb, 2, 132, 199), 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    padding-left: 2px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.35);
    z-index: 3;
    transition: transform 0.2s ease, background 0.2s ease;
}

.download-doc-card:hover .download-doc-video-play-badge {
    transform: scale(1.15);
    background: var(--primary, #0284c7);
}

/* Title text */
.download-doc-card h3 {
    font-size: 1.05rem;
    font-weight: 750;
    color: var(--secondary, #0f2341);
    line-height: 1.45;
    margin-bottom: 0.75rem;
    flex-grow: 1;
    transition: color 0.3s ease;
}

.download-doc-card:hover h3 {
    color: var(--primary);
}

/* Document Description: Hidden by default, show ONLY on hover */
.download-doc-desc {
    font-size: 0.82rem;
    color: #64748b;
    line-height: 1.5;
    margin: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transform: translateY(4px);
    transition: opacity 0.3s cubic-bezier(0.2, 0, 0, 1),
                max-height 0.35s cubic-bezier(0.2, 0, 0, 1),
                transform 0.3s cubic-bezier(0.2, 0, 0, 1),
                margin 0.25s ease;
    pointer-events: none;
}

.download-doc-card:hover .download-doc-desc {
    opacity: 1;
    max-height: 100px;
    transform: translateY(0);
    margin-top: 4px;
    margin-bottom: 1rem;
    pointer-events: auto;
}

/* Card footer details & action row */
.download-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f1f5f9;
    padding-top: 18px;
    margin-top: auto;
}

.doc-metadata {
    display: flex;
    flex-direction: column;
}

.meta-download-text {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
}

.download-doc-card:hover .meta-download-text {
    color:var(--primary);
}

.btn-download-action {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(2, 132, 199, 0.08);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    border: none;
    box-shadow: 0 4px 10px rgba(2, 132, 199, 0.1);
    text-decoration: none !important;
    cursor: pointer;
}

.download-doc-card:hover .btn-download-action {
    background:var(--primary);
    color: var(--primary-bg) !important;
    transform: scale(1.08);
    box-shadow: 0 8px 20px rgba(2, 132, 199, 0.25);
}

/* --------------------------------------------------------------------------
   SECURE READ-ONLY DOCUMENT VIEWER MODAL
   -------------------------------------------------------------------------- */
.doc-viewer-modal {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    user-select: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
}

.doc-viewer-modal.open {
    opacity: 1;
    visibility: visible;
}

.doc-viewer-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    cursor: pointer;
}

.doc-viewer-container {
    position: relative;
    width: 92vw;
    max-width: 1050px;
    height: 90vh;
    background: #ffffff;
    border-radius: 18px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 10;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: modalScaleUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScaleUp {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Viewer Header */
.doc-viewer-header {
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.doc-viewer-title-box {
    display: flex;
    align-items: center;
    gap: 12px;
    overflow: hidden;
}

.doc-viewer-badge {
    font-size: 0.72rem;
    font-weight: 750;
    color: var(--primary, #0284c7);
    background: rgba(var(--primary-rgb), 0.1);
    padding: 4px 10px;
    border-radius: 6px;
    text-transform: uppercase;
    white-space: nowrap;
}

.doc-viewer-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 380px;
}

.doc-viewer-protected-tag {
    font-size: 0.72rem;
    font-weight: 600;
    color: #64748b;
    background: #f1f5f9;
    padding: 3px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

/* Viewer Toolbar */
.doc-viewer-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.doc-tool-btn {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #475569;
    cursor: pointer;
    transition: all 0.2s ease;
}

.doc-tool-btn:hover {
    background: #f1f5f9;
    color: var(--primary);
    border-color: #cbd5e1;
}

.doc-zoom-level {
    font-size: 0.8rem;
    font-weight: 700;
    color: #475569;
    min-width: 45px;
    text-align: center;
}

.doc-viewer-close-btn {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #ef4444;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: 6px;
}

.doc-viewer-close-btn:hover {
    background: #ef4444;
    color: #ffffff;
}

/* Viewer Body (Scrollable, Canvas Protected) */
.doc-viewer-body {
    flex: 1;
    background: #0f172a;
    overflow-y: auto !important;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 28px 16px;
    position: relative;
}

/* Custom Scrollbar for Viewer Body */
.doc-viewer-body::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.doc-viewer-body::-webkit-scrollbar-track {
    background: #1e293b;
}

.doc-viewer-body::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 4px;
}

.doc-viewer-body::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Multi-Page Canvas Container for PDF.js */
.doc-viewer-pages-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.pdf-page-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 100%;
}

.pdf-page-canvas {
    display: block;
    max-width: 100%;
    height: auto !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    border-radius: 4px;
    background: #ffffff;
    pointer-events: none;
    user-select: none;
    transition: transform 0.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.pdf-page-number-tag {
    margin-top: 8px;
    font-size: 0.72rem;
    font-weight: 700;
    color: #94a3b8;
    background: rgba(30, 41, 59, 0.8);
    padding: 2px 10px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.doc-viewer-page-count {
    font-size: 0.72rem;
    font-weight: 700;
    color: #0284c7;
    background: rgba(2, 132, 199, 0.1);
    padding: 3px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

/* Loading Spinner */
.doc-loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: #e2e8f0;
    font-size: 0.88rem;
    font-weight: 600;
    min-height: 240px;
}

.doc-spinner-ring {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255, 255, 255, 0.15);
    border-top-color: #38bdf8;
    border-radius: 50%;
    animation: docSpin 0.8s linear infinite;
}

@keyframes docSpin {
    to { transform: rotate(360deg); }
}

.doc-error-msg {
    color: #f87171;
    font-size: 0.9rem;
    padding: 20px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.doc-viewer-canvas-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    background: #ffffff;
    border-radius: 6px;
    overflow: hidden;
}

.doc-viewer-img {
    display: block;
    max-width: 100%;
    max-height: 72vh;
    object-fit: contain;
    transition: transform 0.2s cubic-bezier(0.25, 1, 0.5, 1);
    transform-origin: center center;
    pointer-events: none;
    -webkit-user-drag: none;
}

.doc-viewer-video-wrapper {
    position: relative;
    display: none;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 380px;
    padding: 20px;
    background: #000000;
    border-radius: 12px;
}

.doc-viewer-video-player {
    max-width: 100%;
    max-height: 70vh;
    border-radius: 8px;
    outline: none;
}

/* Viewer Footer */
.doc-viewer-footer {
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
    padding: 10px 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   RESPONSIVE LAYOUT ADJUSTMENTS
   -------------------------------------------------------------------------- */
@media (max-width: 1199px) {
    .download-cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 767px) {
    .download-page-section {
        padding: 60px 0;
    }

    .download-tabs {
        margin-bottom: 2.5rem;
        gap: 0.5rem;
    }

    .download-tab-btn {
        padding: 0.5rem 1.25rem;
        font-size: 0.8rem;
    }

    .download-cards-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .download-doc-card {
        padding: 20px;
    }

    .download-doc-visual-wrap {
        height: 160px;
        margin-bottom: 15px;
    }

    .doc-viewer-container {
        width: 96vw;
        height: 94vh;
        border-radius: 12px;
    }

    .doc-viewer-title {
        max-width: 150px;
        font-size: 0.95rem;
    }

    .doc-viewer-protected-tag {
        display: none;
    }

    .doc-viewer-body {
        padding: 12px;
    }
}

/* ==========================================================================
   Section Intro Header (Matching Blog Page Design Exactly)
   ========================================================================== */
.download-section-header {
    text-align: center;
    margin-bottom: 50px;
}

.download-section-header h2 {
    font-size: 2.25rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.download-section-header p {
    color: #64748b;
    max-width: 720px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.6;
}

/* ==========================================================================
   Download Empty State - Identical to Blog Empty State Design
   ========================================================================== */
.download-empty-state-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 10px 0 50px 0;
    grid-column: 1 / -1;
}

.download-empty-state {
    text-align: center;
    padding: 56px 36px;
    background: #ffffff;
    border-radius: 24px;
    border: 1px solid rgba(var(--primary-rgb, 38, 59, 117), 0.12);
    box-shadow: 0 20px 48px -10px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.02);
    margin: 20px auto;
    max-width: 580px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.download-cards-grid .download-empty-state {
    grid-column: 1 / -1;
    width: 100%;
    margin: 20px auto;
}

.download-empty-state::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary, #263b75) 0%, #f97316 100%);
}

.download-empty-state:hover {
    transform: translateY(-4px);
    box-shadow: 0 26px 54px -10px rgba(15, 23, 42, 0.12), 0 6px 18px rgba(15, 23, 42, 0.04);
}

.download-empty-icon-box {
    width: 84px;
    height: 84px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(var(--primary-rgb, 38, 59, 117), 0.08) 0%, rgba(249, 115, 22, 0.12) 100%);
    color: var(--primary, #263b75);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    border: 1px solid rgba(var(--primary-rgb, 38, 59, 117), 0.15);
    box-shadow: 0 10px 24px -4px rgba(var(--primary-rgb, 38, 59, 117), 0.12);
}

.download-empty-icon-box svg {
    color: var(--primary, #263b75);
    stroke: currentColor;
    transition: transform 0.3s ease;
}

.download-empty-state:hover .download-empty-icon-box svg {
    transform: scale(1.08) rotate(-4deg);
}

.download-empty-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(var(--primary-rgb, 38, 59, 117), 0.07);
    color: var(--primary, #263b75);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 4px 14px;
    border-radius: 100px;
    margin-bottom: 14px;
    border: 1px solid rgba(var(--primary-rgb, 38, 59, 117), 0.15);
}

.download-empty-state h3,
.download-empty-state h4,
.download-empty-title {
    font-size: 1.55rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0 0 10px 0;
    letter-spacing: -0.015em;
    line-height: 1.25;
}

.download-empty-state p,
.download-empty-desc {
    color: #64748b;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 26px 0;
    max-width: 440px;
}

.download-empty-action {
    display: flex;
    justify-content: center;
}

.download-empty-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary, #263b75);
    color: #ffffff !important;
    font-weight: 600;
    font-size: 0.92rem;
    padding: 11px 26px;
    border-radius: 50px;
    text-decoration: none !important;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 6px 18px rgba(var(--primary-rgb, 38, 59, 117), 0.28);
}

.download-empty-btn:hover {
    background: #0f172a;
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.22);
    color: #ffffff !important;
}

.download-empty-btn svg {
    transition: transform 0.25s ease;
}

.download-empty-btn:hover svg {
    transform: translateX(-3px);
}

@media (max-width: 576px) {
    .download-section-header h2 {
        font-size: 1.75rem;
    }
    .download-empty-state {
        padding: 40px 20px;
        border-radius: 20px;
    }
    .download-empty-state h3,
    .download-empty-state h4,
    .download-empty-title {
        font-size: 1.35rem;
    }
}