/*
 * PDF Viewer - Simulated native document reader (Evince/Okular-like)
 * Draggable OS window that renders real PDF pages via Mozilla PDF.js.
 * Styling is coherent with the rest of the pseudo-desktop.
 */

.pdf-viewer {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    width: 860px;
    height: 600px;
    background: rgba(30, 30, 50, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    box-shadow:
        0 24px 80px rgba(0, 0, 0, 0.6),
        0 0 60px rgba(0, 0, 0, 0.3);
    display: none;
    flex-direction: column;
    overflow: hidden;
    position: fixed;
    z-index: 1999;
    animation: pdfWindowOpen 0.2s ease-out;
}

.pdf-viewer.open {
    display: flex;
}

.pdf-viewer.active-window {
    z-index: 2000;
}

@keyframes pdfWindowOpen {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* === TITLE BAR === */
.pv-title-bar {
    display: flex;
    align-items: center;
    height: 38px;
    background: linear-gradient(180deg, rgba(45, 45, 68, 0.9) 0%, rgba(30, 30, 50, 0.9) 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px 12px 0 0;
    padding: 0 12px;
    user-select: none;
    cursor: grab;
    flex-shrink: 0;
}

.pv-title-bar:active {
    cursor: grabbing;
}

.pv-title-buttons {
    display: flex;
    gap: 8px;
    margin-right: 12px;
}

.pv-title-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: filter 0.15s;
}

.pv-title-btn:hover {
    filter: brightness(1.3);
}

.pv-title-btn.close { background: #ff5f56; }
.pv-title-btn.minimize { background: #ffbd2e; }
.pv-title-btn.maximize { background: #27c93f; }

.pv-title-text {
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    flex: 1;
    margin-right: 88px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* === TOP TOOLBAR (reader controls) === */
.pv-toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    background: rgba(24, 24, 42, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    flex-shrink: 0;
    flex-wrap: wrap;
}

.pv-toolbar .pv-sep {
    width: 1px;
    height: 22px;
    background: rgba(255, 255, 255, 0.12);
    margin: 0 4px;
}

.pv-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    min-width: 34px;
    height: 26px;
    padding: 0 8px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.13s;
    line-height: 1;
}

.pv-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.95);
}

.pv-btn:active {
    background: rgba(51, 255, 51, 0.18);
}

.pv-btn:disabled {
    opacity: 0.25;
    cursor: default;
    pointer-events: none;
}

.pv-btn.pv-active {
    background: rgba(51, 255, 51, 0.18);
    color: #33ff33;
}

.pv-toolbar .pv-zoom-indicator {
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
    min-width: 48px;
    text-align: center;
}

.pv-page-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 12.5px;
    font-family: 'Cascadia Code', 'Consolas', monospace;
}

.pv-page-input {
    width: 36px;
    height: 24px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 4px;
    color: #fff;
    text-align: center;
    font-size: 12px;
    font-family: inherit;
    outline: none;
}

.pv-page-input:focus {
    border-color: #33ff33;
}

.pv-page-total {
    color: rgba(255, 255, 255, 0.4);
}

/* === MAIN BODY (sidebar thumbnails + page canvas) === */
.pv-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

/* Secondary toolbar (page labels / mode) optional row above body */
/* === LEFT: PAGE THUMBNAILS SIDEBAR === */
.pv-thumbs {
    width: 150px;
    min-width: 150px;
    background: rgba(0, 0, 0, 0.22);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    overflow-y: auto;
    padding: 10px 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
}

.pv-thumb {
    border: 2px solid rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    overflow: hidden;
    transition: border-color 0.13s, box-shadow 0.13s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2px;
    position: relative;
}

.pv-thumb:hover {
    border-color: rgba(51, 255, 51, 0.6);
}

.pv-thumb.pv-thumb-active {
    border-color: #33ff33;
    box-shadow: 0 0 10px rgba(51, 255, 51, 0.35);
}

.pv-thumb canvas {
    width: 100%;
    height: auto;
    display: block;
}

.pv-thumb .pv-thumb-num {
    position: absolute;
    bottom: 3px;
    right: 5px;
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    font-size: 9px;
    padding: 1px 5px;
    border-radius: 8px;
    font-family: 'Cascadia Code','Consolas',monospace;
    pointer-events: none;
}

/* === RIGHT: PAGE RENDERING AREA === */
.pv-viewport {
    flex: 1;
    overflow: auto;
    background: #1b1b22;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(255,255,255,0.02) 0, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(85, 85, 120, 0.05) 0, transparent 50%);
    position: relative;
}

/* Continuous scroll wrap */
.pv-pages-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 20px 24px 60px;
    min-height: 100%;
}

.pv-page-canvas {
    background: #fff;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.55);
    border-radius: 2px;
    transition: width 0.15s ease;
}

.pv-loading, .pv-error {
    padding: 60px 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.pv-loading .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.12);
    border-top-color: #33ff33;
    border-radius: 50%;
    animation: pvSpin 0.8s linear infinite;
}

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

.pv-error .icon { font-size: 56px; }
.pv-error .pv-detail { font-size: 12px; color: rgba(255,255,255,0.3); word-break: break-all; max-width: 420px; }

/* === STATUS BAR === */
.pv-statusbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 3px 12px;
    background: rgba(0, 0, 0, 0.22);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    color: rgba(255, 255, 255, 0.35);
    font-size: 11px;
    flex-shrink: 0;
    user-select: none;
}

/* === SCROLLBARS === */
.pv-thumbs::-webkit-scrollbar,
.pv-viewport::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.pv-thumbs::-webkit-scrollbar-track,
.pv-viewport::-webkit-scrollbar-track {
    background: transparent;
}

.pv-thumbs::-webkit-scrollbar-thumb,
.pv-viewport::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 4px;
}

.pv-viewport::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.22); }

/* === RESPONSIVE === */
@media (max-width: 900px) {
    .pdf-viewer {
        width: calc(100% - 24px);
        height: calc(100vh - 90px);
        max-height: 640px;
    }
    .pv-title-text { width: auto; margin-right: 0; font-size: 12px; }
    .pv-thumbs { width: 110px; min-width: 110px; }
}

/* === MAXIMIZED: fill the whole viewport === */
.pdf-viewer.pv-maximized {
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: auto !important;
    height: auto !important;
    max-width: 100vw !important;
    border-radius: 0 !important;
    animation: none;
}

/* === HIDE the lateral page-thumbnail column ===
   (the main reading area then uses all of the body width) */
.pdf-viewer.pv-thumbs-hidden .pv-thumbs {
    display: none;
}

/* Red "Close" button styling inside dialogs */
.pv-btn.pv-danger {
    background: #c33;
    color: #fff;
}
.pv-btn.pv-danger:hover {
    background: #e04040;
}

/* === CONFIRM-BEFORE-CLOSE dialog === */
.pv-dialog-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    animation: pvDialogFade 0.15s ease-out;
}
@keyframes pvDialogFade {
    from { opacity: 0; }
    to { opacity: 1; }
}
.pv-dialog {
    width: min(320px, calc(100% - 40px));
    background: rgba(28, 28, 46, 0.97);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    padding: 18px 18px 16px;
    transform: scale(0.98);
    animation: pvDialogPop 0.14s ease-out forwards;
}
@keyframes pvDialogPop {
    to { transform: scale(1); }
}
.pv-dialog-title {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 8px;
}
.pv-dialog-msg {
    font-size: 12.5px;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.4;
    overflow-wrap: break-word;
    word-break: break-word;
}
.pv-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 18px;
}