/* =========================================================
   ENCBYT IN-APP PREVIEW ENGINE — STYLESHEET v2.2
   Path: frontend/pwa/css/preview.css
   Security: Strict CSP Compliant (Zero Inline Styles)
   Target Engine: frontend/pwa/js/preview.js
   Features: Non-blocking, resizable, no-blur backdrop
   Fix: Removed !important from transform to allow JS drag/resize
   ========================================================= */

/* Backdrop Overlay — Non-Blocking, No Blur */
.preview-backdrop {
    position: fixed !important;
    inset: 0 !important;
    background: transparent !important;
    pointer-events: none !important;
    z-index: 999990 !important;
    animation: cvFadeIn 0.2s ease;
}

/* Modal Dialog Container — Resizable, Floating, Center-Default */
.preview-modal-dialog {
    position: fixed !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%);
    z-index: 999999 !important;
    background: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 16px !important;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.25), 0 0 0 1px rgba(226, 232, 240, 0.6) !important;
    width: 680px !important;
    height: 520px !important;
    min-width: 320px !important;
    min-height: 240px !important;
    max-width: 95vw !important;
    max-height: 90vh !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    pointer-events: auto !important;
    animation: cvScaleIn 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cvFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes cvScaleIn {
    from { transform: translate(-50%, -50%) scale(0.95); opacity: 0; }
    to { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* Interactive Resize Handle — bottom-right corner */
.preview-resize-handle {
    position: absolute !important;
    bottom: 0 !important;
    right: 0 !important;
    width: 18px !important;
    height: 18px !important;
    cursor: nwse-resize !important;
    background: linear-gradient(
        135deg,
        transparent 45%,
        #cbd5e1 45%,
        #cbd5e1 55%,
        transparent 55%
    ) !important;
    opacity: 0.6 !important;
    z-index: 10 !important;
    border-bottom-right-radius: 16px !important;
    touch-action: none !important;
    user-select: none !important;
}

.preview-resize-handle:hover {
    opacity: 1 !important;
    background: linear-gradient(
        135deg,
        transparent 45%,
        #2563eb 45%,
        #2563eb 55%,
        transparent 55%
    ) !important;
}

/* Modal Header Bar — Draggable */
.preview-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 12px 18px !important;
    background: #f8fafc !important;
    border-bottom: 1px solid #e2e8f0 !important;
    cursor: grab !important;
    user-select: none !important;
    flex-shrink: 0 !important;
}

.preview-header:active,
.preview-header.is-dragging {
    cursor: grabbing !important;
}

.preview-title {
    font-size: 14px !important;
    font-weight: 700 !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
    color: #0f172a !important;
    max-width: 480px !important;
    pointer-events: none !important;
}

.preview-close-btn {
    background: transparent !important;
    border: none !important;
    cursor: pointer !important;
    color: #64748b !important;
    font-size: 22px !important;
    line-height: 1 !important;
    padding: 2px 6px !important;
    border-radius: 6px !important;
    transition: all 0.15s ease !important;
    flex-shrink: 0 !important;
}

.preview-close-btn:hover {
    color: #ef4444 !important;
    background: #fee2e2 !important;
}

/* Modal Body Content Area */
.preview-body {
    padding: 20px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: 280px !important;
    flex: 1 !important;
    overflow: auto !important;
    background: #ffffff !important;
    box-sizing: border-box !important;
}

/* Image Viewer */
.preview-image {
    max-width: 100% !important;
    max-height: 100% !important;
    object-fit: contain !important;
    border-radius: 10px !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08) !important;
}

/* =========================================================
   IMAGE ZOOM  (toolbar + clipping stage)
   Layout for an image preview:
     .preview-zoom            column, fills .preview-body
       .preview-zoom-toolbar  "-  100%  +  Reset"
       .preview-zoom-stage    clips the scaled image
   ========================================================= */

/* While zooming we clip instead of scroll: the stage own panning keeps the
   image reachable, and a second scrollbar would fight the modal resize. */
.preview-body.preview-body--zoom {
    padding: 12px !important;
    overflow: hidden !important;
}

.preview-zoom {
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
    flex: 1 1 auto !important;
    align-self: stretch !important;
    width: 100% !important;
    height: 100% !important;
    min-width: 0 !important;
    min-height: 0 !important;
}

.preview-zoom-toolbar {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
    flex-shrink: 0 !important;
    padding: 6px 10px !important;
    background: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 10px !important;
    user-select: none !important;
}

.preview-zoom-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 32px !important;
    height: 32px !important;
    padding: 0 !important;
    background: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 8px !important;
    color: #475569 !important;
    font-size: 17px !important;
    font-weight: 700 !important;
    line-height: 1 !important;
    cursor: pointer !important;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease !important;
}

.preview-zoom-btn:hover:not(:disabled) {
    background: #eff6ff !important;
    border-color: #bfdbfe !important;
    color: #2563eb !important;
}

.preview-zoom-btn:focus-visible {
    outline: 2px solid #2563eb !important;
    outline-offset: 1px !important;
}

.preview-zoom-btn:disabled {
    opacity: 0.4 !important;
    cursor: not-allowed !important;
}

.preview-zoom-level {
    min-width: 56px !important;
    text-align: center !important;
    font-size: 12px !important;
    font-weight: 700 !important;
    color: #475569 !important;
    font-variant-numeric: tabular-nums !important;
}

.preview-zoom-reset {
    width: auto !important;
    padding: 0 12px !important;
    font-size: 12px !important;
}

/* The clipping viewport. touch-action:none hands pan/pinch to the JS instead
   of letting the browser scroll the page underneath. */
.preview-zoom-stage {
    position: relative !important;
    flex: 1 1 auto !important;
    min-height: 0 !important;
    overflow: hidden !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    background: #ffffff !important;
    border-radius: 10px !important;
    cursor: grab !important;
    touch-action: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
}

.preview-zoom-stage.is-panning {
    cursor: grabbing !important;
}

.preview-zoom-stage .preview-image {
    transform-origin: center center !important;
    will-change: transform !important;
    /* The stage handles gestures, so the image must not swallow them. */
    pointer-events: none !important;
    -webkit-user-drag: none !important;
    /* Clear of the box-shadow so the edge is easy to see while panning. */
    margin: 0 !important;
}

/* Video Player */
.preview-video {
    width: 100% !important;
    max-height: 100% !important;
    background: #000000 !important;
    border-radius: 10px !important;
    outline: none !important;
}

/* Audio Player Container */
.preview-audio-container {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    padding: 20px 0 !important;
    gap: 16px !important;
}

.preview-audio-icon {
    font-size: 48px !important;
    color: #8b5cf6 !important;
}

.preview-audio {
    width: 90% !important;
    max-width: 440px !important;
    outline: none !important;
}

/* Document & PDF Frame */
.preview-frame {
    width: 100% !important;
    height: 100% !important;
    border: none !important;
    border-radius: 10px !important;
    background: #f8fafc !important;
}

/* Text and Code Viewer */
.preview-text-box {
    width: 100% !important;
    height: 100% !important;
    overflow: auto !important;
    padding: 14px !important;
    background: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 10px !important;
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace !important;
    font-size: 12.5px !important;
    line-height: 1.6 !important;
    color: #1e293b !important;
    white-space: pre-wrap !important;
    word-break: break-word !important;
    box-sizing: border-box !important;
}

/* Fallback Container for Unsupported Binary Files */
.preview-fallback {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    text-align: center !important;
    padding: 20px !important;
}

.preview-fallback-icon {
    font-size: 52px !important;
    color: #2563eb !important;
    margin-bottom: 14px !important;
}

.preview-fallback-desc {
    font-size: 13.5px !important;
    color: #64748b !important;
    margin: 0 0 18px 0 !important;
    line-height: 1.4 !important;
}

/* Error State */
.preview-error {
    color: #ef4444 !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    text-align: center !important;
}

/* Responsive Rules */
@media (max-width: 768px) {
    .preview-modal-dialog {
        width: calc(100vw - 40px) !important;
        height: calc(100vh - 80px) !important;
        max-width: 95vw !important;
        max-height: 90vh !important;
    }

    .preview-title {
        max-width: 260px !important;
    }
}

/* ═══════════════════════════════════════════════════════════════
   DARK MODE — PREVIEW MODAL
   ═══════════════════════════════════════════════════════════════ */

[data-theme="dark"] .preview-modal-dialog,
body.dark-mode .preview-modal-dialog {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-color) !important;
}

[data-theme="dark"] .preview-header,
body.dark-mode .preview-header {
    background: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .preview-title,
[data-theme="dark"] .preview-subtitle,
body.dark-mode .preview-title,
body.dark-mode .preview-subtitle {
    color: var(--text-main) !important;
}

[data-theme="dark"] .preview-close-btn,
body.dark-mode .preview-close-btn {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .preview-close-btn:hover,
body.dark-mode .preview-close-btn:hover {
    color: var(--text-main) !important;
}

[data-theme="dark"] .preview-resize-handle,
body.dark-mode .preview-resize-handle {
    background: linear-gradient(
        135deg,
        transparent 45%,
        var(--text-secondary) 45%,
        var(--text-secondary) 55%,
        transparent 55%
    ) !important;
}

[data-theme="dark"] .preview-image-box,
[data-theme="dark"] .preview-text-box,
body.dark-mode .preview-image-box,
body.dark-mode .preview-text-box {
    background: var(--bg-page) !important;
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .preview-text-box,
body.dark-mode .preview-text-box {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .preview-fallback-icon,
body.dark-mode .preview-fallback-icon {
    color: var(--accent-primary) !important;
}

[data-theme="dark"] .preview-fallback-desc,
body.dark-mode .preview-fallback-desc {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .preview-error,
body.dark-mode .preview-error {
    color: #f87171 !important;
}