/* ═══════════════════════════════════════════════════════════════
   PDF Viewer — Chrome-like design
   ═══════════════════════════════════════════════════════════════ */

/* ── CSS custom properties ─────────────────────────────────────── */
.ppv {
    --ppv-toolbar-h:        48px;
    --ppv-status-h:         26px;
    --ppv-sidebar-w:        168px;
    --ppv-thumb-w:          120px;

    /* colours */
    --ppv-toolbar-bg:       #3c4043;
    --ppv-toolbar-border:   rgba(0,0,0,0.5);
    --ppv-icon-color:       #dadce0;
    --ppv-icon-hover-bg:    rgba(255,255,255,0.12);
    --ppv-icon-active-bg:   rgba(255,255,255,0.22);
    --ppv-icon-active-color:#8ab4f8;
    --ppv-divider:          rgba(255,255,255,0.18);
    --ppv-stage-bg:         #525659;
    --ppv-sidebar-bg:       #424547;
    --ppv-sidebar-border:   rgba(0,0,0,0.4);
    --ppv-page-bg:          #ffffff;
    --ppv-page-shadow:      0 2px 16px rgba(0,0,0,0.55);
    --ppv-page-radius:      2px;
    --ppv-thumb-border:     rgba(255,255,255,0.1);
    --ppv-thumb-hover-bg:   rgba(255,255,255,0.08);
    --ppv-thumb-active-bg:  rgba(138,180,248,0.22);
    --ppv-thumb-active-ring:#8ab4f8;
    --ppv-overlay-bg:       rgba(40,42,45,0.88);
    --ppv-status-bg:        #2d3136;
    --ppv-status-color:     #bdc1c6;
    --ppv-input-bg:         rgba(255,255,255,0.08);
    --ppv-input-border:     rgba(255,255,255,0.22);
    --ppv-input-focus:      #8ab4f8;
    --ppv-error-color:      #f28b82;
    --ppv-accent:           #8ab4f8;
    --ppv-focus-ring:       0 0 0 2px rgba(138,180,248,0.55);
}

/* ── Root shell ─────────────────────────────────────────────────── */
.ppv {
    position: relative;
    display: flex;
    flex-direction: column;
    height: clamp(560px, 82vh, 1100px);
    background: var(--ppv-stage-bg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 13px;
    line-height: 1.4;
    color: var(--ppv-icon-color);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,0.3);
    user-select: none;
    -webkit-user-select: none;
}

.ppv[data-ppv-mode="home"] {
    height: clamp(380px, 60vh, 680px);
    box-shadow: 0 2px 12px rgba(0,0,0,0.22);
}

/* ── Toolbar ────────────────────────────────────────────────────── */
.ppv-toolbar {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    height: var(--ppv-toolbar-h);
    background: var(--ppv-toolbar-bg);
    border-bottom: 1px solid var(--ppv-toolbar-border);
    padding: 0 6px;
    gap: 2px;
    z-index: 10;
    box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

.ppv-toolbar__group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.ppv-toolbar__left  { flex-shrink: 0; }
.ppv-toolbar__right { flex-shrink: 0; margin-left: auto; }
.ppv-toolbar__center {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 1;
    justify-content: center;
    flex-wrap: nowrap;
    overflow: hidden;
}

.ppv-toolbar__divider {
    width: 1px;
    height: 22px;
    background: var(--ppv-divider);
    margin: 0 4px;
    flex-shrink: 0;
}

/* ── Toolbar buttons ─────────────────────────────────────────────── */
.ppv-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--ppv-icon-color);
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
    text-decoration: none;
    padding: 0;
}

.ppv-icon-btn {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.ppv-btn:hover:not(:disabled) {
    background: var(--ppv-icon-hover-bg);
    color: #fff;
}

.ppv-btn:focus-visible {
    outline: none;
    box-shadow: var(--ppv-focus-ring);
}

.ppv-btn:disabled {
    opacity: 0.38;
    cursor: not-allowed;
}

.ppv-btn.is-active {
    background: var(--ppv-icon-active-bg);
    color: var(--ppv-icon-active-color);
}

.ppv-btn.is-active:hover:not(:disabled) {
    background: var(--ppv-icon-active-bg);
}

/* ── Page navigation ─────────────────────────────────────────────── */
.ppv-page-nav {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0 4px;
}

.ppv-page-input {
    width: 44px;
    height: 28px;
    padding: 0 6px;
    border: 1px solid var(--ppv-input-border);
    border-radius: 4px;
    background: var(--ppv-input-bg);
    color: var(--ppv-icon-color);
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    text-align: center;
    -moz-appearance: textfield;
    appearance: textfield;
}

.ppv-page-input::-webkit-outer-spin-button,
.ppv-page-input::-webkit-inner-spin-button { -webkit-appearance: none; }

.ppv-page-input:focus {
    outline: none;
    border-color: var(--ppv-input-focus);
    box-shadow: var(--ppv-focus-ring);
}

.ppv-page-input:disabled { opacity: 0.4; cursor: not-allowed; }

.ppv-page-sep  { color: rgba(255,255,255,0.45); font-size: 12px; }

.ppv-page-total {
    color: rgba(255,255,255,0.65);
    font-size: 12px;
    font-weight: 600;
    min-width: 22px;
    white-space: nowrap;
}

/* ── Zoom level display ──────────────────────────────────────────── */
.ppv-zoom-level {
    min-width: 46px;
    text-align: center;
    font-size: 12px;
    font-weight: 700;
    color: rgba(255,255,255,0.65);
    padding: 0 2px;
    white-space: nowrap;
}

/* ── Body: sidebar + stage ──────────────────────────────────────── */
.ppv-body {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ── Sidebar / thumbnail panel ──────────────────────────────────── */
.ppv-sidebar {
    width: var(--ppv-sidebar-w);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    background: var(--ppv-sidebar-bg);
    border-right: 1px solid var(--ppv-sidebar-border);
    overflow: hidden;
    transition: width 0.22s cubic-bezier(0.4,0,0.2,1);
}

.ppv.is-sidebar-collapsed .ppv-sidebar {
    width: 0;
    border-right-width: 0;
}

.ppv-thumbs {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 10px 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.2) transparent;
}

.ppv-thumbs::-webkit-scrollbar       { width: 5px; }
.ppv-thumbs::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.18); border-radius: 3px; }

/* ── Thumbnail button ────────────────────────────────────────────── */
.ppv-thumb {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 6px;
    border: 1px solid transparent;
    border-radius: 5px;
    background: transparent;
    color: rgba(255,255,255,0.55);
    font: inherit;
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    width: 100%;
    text-align: center;
}

.ppv-thumb:hover:not(:disabled) {
    background: var(--ppv-thumb-hover-bg);
    color: rgba(255,255,255,0.85);
    border-color: var(--ppv-thumb-border);
}

.ppv-thumb:focus-visible {
    outline: none;
    box-shadow: var(--ppv-focus-ring);
}

.ppv-thumb.is-active {
    background: var(--ppv-thumb-active-bg);
    border-color: var(--ppv-thumb-active-ring);
    color: var(--ppv-accent);
}

.ppv-thumb-canvas {
    display: block;
    width: auto;
    max-width: 100%;
    height: auto;
    min-height: 64px;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 2px;
    background: #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.45);
}

.ppv-thumb.is-rendering .ppv-thumb-canvas {
    opacity: 0.4;
}

/* ── Stage (main scroll area) ───────────────────────────────────── */
.ppv-stage {
    flex: 1;
    min-width: 0;
    min-height: 0;
    overflow: auto;
    background: var(--ppv-stage-bg);
    outline: none;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.22) transparent;
}

.ppv-stage::-webkit-scrollbar        { width: 8px; height: 8px; }
.ppv-stage::-webkit-scrollbar-track  { background: transparent; }
.ppv-stage::-webkit-scrollbar-thumb  { background: rgba(255,255,255,0.2); border-radius: 4px; }
.ppv-stage::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.35); }

.ppv-stage-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 20px 16px;
    min-height: 100%;
}

/* Single-page layout: centre vertically too */
.ppv-stage-inner.is-single {
    justify-content: center;
    min-height: 100%;
}

/* ── Page card ──────────────────────────────────────────────────── */
.ppv-page {
    position: relative;
    background: var(--ppv-page-bg);
    box-shadow: var(--ppv-page-shadow);
    border-radius: var(--ppv-page-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}

.ppv-page-num {
    position: absolute;
    top: 5px;
    left: 7px;
    font-size: 10px;
    font-weight: 700;
    color: rgba(0,0,0,0.28);
    pointer-events: none;
    user-select: none;
    line-height: 1;
}

/* Loading shimmer while page renders */
.ppv-page:not(.is-rendered)::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
        rgba(230,230,230,0) 0%,
        rgba(200,200,200,0.6) 50%,
        rgba(230,230,230,0) 100%);
    background-size: 200% 100%;
    animation: ppv-shimmer 1.4s infinite;
}

@keyframes ppv-shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position:  200% 0; }
}

.ppv-page.is-rendered::after { display: none; }

.ppv-canvas {
    display: block;
    width: auto;
    height: auto;
}

.ppv-page:not(.is-rendered) .ppv-canvas {
    visibility: hidden;
}

/* ── Overlay (initial loading) ──────────────────────────────────── */
.ppv-overlay {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    background: var(--ppv-overlay-bg);
    color: #e8eaed;
    font-size: 14px;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.ppv.is-loading .ppv-overlay {
    opacity: 1;
    pointer-events: auto;
}

.ppv-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255,255,255,0.15);
    border-top-color: var(--ppv-accent);
    border-radius: 50%;
    animation: ppv-spin 0.75s linear infinite;
}

@keyframes ppv-spin {
    to { transform: rotate(360deg); }
}

.ppv-overlay-msg { margin: 0; }

/* ── Status bar ─────────────────────────────────────────────────── */
.ppv-statusbar {
    flex-shrink: 0;
    height: var(--ppv-status-h);
    display: flex;
    align-items: center;
    padding: 0 12px;
    background: var(--ppv-status-bg);
    color: var(--ppv-status-color);
    font-size: 11.5px;
    font-weight: 600;
    border-top: 1px solid rgba(0,0,0,0.4);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.ppv.is-error .ppv-statusbar {
    color: var(--ppv-error-color);
}

/* ── Fullscreen ─────────────────────────────────────────────────── */
.ppv:fullscreen,
.ppv:-webkit-full-screen {
    height: 100vh;
    max-height: none;
    border-radius: 0;
}

.ppv:fullscreen .ppv-stage,
.ppv:-webkit-full-screen .ppv-stage {
    max-height: none;
}

/* show compress icon when in fullscreen */
.ppv:fullscreen .ppv-icon-expand,
.ppv:-webkit-full-screen .ppv-icon-expand   { display: none; }
.ppv:fullscreen .ppv-icon-compress,
.ppv:-webkit-full-screen .ppv-icon-compress { display: block !important; }

/* ── No-JS fallback ─────────────────────────────────────────────── */
.ppv-noscript {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px 24px;
    text-align: center;
    color: #e8eaed;
    font-size: 15px;
}

.ppv-noscript a {
    display: inline-block;
    padding: 10px 24px;
    background: var(--ppv-accent);
    color: #202124;
    border-radius: 6px;
    font-weight: 700;
    text-decoration: none;
}

/* ═══ Responsive ════════════════════════════════════════════════ */

/* ── Tablet (≤ 1100px): collapse sidebar by default ─────────────── */
@media (max-width: 1100px) {
    .ppv:not(:fullscreen) {
        height: clamp(500px, 78vh, 900px);
    }

    .ppv-toolbar__center { gap: 1px; }
}

/* ── Mobile (≤ 700px): stack sidebar below, hide some toolbar items */
@media (max-width: 700px) {
    .ppv {
        height: clamp(480px, 88svh, 780px);
    }

    .ppv-toolbar {
        height: auto;
        min-height: var(--ppv-toolbar-h);
        flex-wrap: wrap;
        padding: 4px 6px;
        gap: 4px;
    }

    .ppv-toolbar__left  { order: 1; }
    .ppv-toolbar__center { order: 2; width: 100%; justify-content: center; flex-wrap: wrap; }
    .ppv-toolbar__right  { order: 3; margin-left: 0; }

    .ppv-toolbar__divider { display: none; }

    .ppv-sidebar {
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 15;
        box-shadow: 2px 0 12px rgba(0,0,0,0.5);
    }

    .ppv.is-sidebar-collapsed .ppv-sidebar { width: 0; overflow: hidden; }

    .ppv-thumbs {
        flex-direction: row;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 8px;
        max-height: none;
        height: 100%;
    }

    .ppv-thumb { flex: 0 0 80px; }

    .ppv-icon-btn { width: 32px; height: 32px; }

    .ppv-page-input { width: 38px; }

    .ppv-stage-inner { padding: 12px 8px; gap: 10px; }
}

/* ── Tiny screens (≤ 400px) ─────────────────────────────────────── */
@media (max-width: 400px) {
    .ppv-zoom-level { display: none; }
}

/* ═══ Dark-mode site integration ════════════════════════════════ */
body.dark-mode .ppv {
    --ppv-toolbar-bg:       #282a2d;
    --ppv-stage-bg:         #35373a;
    --ppv-sidebar-bg:       #2c2f33;
    --ppv-status-bg:        #1e2023;
    --ppv-overlay-bg:       rgba(20,22,25,0.9);
}