/* ── PDF Viewer Block — view.css ─────────────────────────────── */
.pdf-viewer-block {
    --pvb-bg:       #f4f4f2;
    --pvb-border:   #d6d3cd;
    --pvb-accent:   #c0392b;
    --pvb-text:     #2c2c2c;
    --pvb-muted:    #7a7775;
    --pvb-hover:    #e9e7e3;
    --pvb-radius:   6px;
    --pvb-sidebar:  220px;

    font-family: sans-serif;
    font-size: .9rem;
    color: var(--pvb-text);
    background: var(--pvb-bg);
    border: 1px solid var(--pvb-border);
    border-radius: var(--pvb-radius);
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,.10);
}

/* Title */
.pvb-title {
    margin: 0;
    padding: .7rem 1.1rem;
    font-size: 1.05rem;
    font-weight: 600;
    border-bottom: 1px solid var(--pvb-border);
    background: #fff;
}

/* Empty state */
.pvb-empty {
    padding: 2rem;
    color: var(--pvb-muted);
    text-align: center;
}

/* Layout */
.pvb-layout {
    display: flex;
    align-items: stretch;
}

/* ── Sidebar ── */
.pvb-sidebar {
    width: var(--pvb-sidebar);
    flex-shrink: 0;
    border-right: 1px solid var(--pvb-border);
    background: #faf9f7;
    overflow-y: auto;
}
.pvb-sidebar__heading {
    margin: 0;
    padding: .55rem .9rem;
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--pvb-muted);
    border-bottom: 1px solid var(--pvb-border);
}
.pvb-sidebar nav ul {
    list-style: none;
    margin: 0;
    padding: .3rem 0;
}
.pvb-sidebar nav li + li {
    border-top: 1px solid #ece9e4;
}
.pvb-index-link {
    display: flex;
    align-items: baseline;
    gap: .45rem;
    padding: .45rem .85rem;
    text-decoration: none;
    color: var(--pvb-text);
    transition: background .12s;
}
.pvb-index-link:hover,
.pvb-index-link.is-active {
    background: var(--pvb-hover);
    color: var(--pvb-accent);
}
.pvb-index-link.is-active { font-weight: 600; }
.pvb-index-link__page {
    font-size: .72rem;
    color: var(--pvb-muted);
    min-width: 1.6rem;
    flex-shrink: 0;
}

/* ── Main column ── */
.pvb-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

/* Search bar */
.pvb-search {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .45rem .7rem;
    border-bottom: 1px solid var(--pvb-border);
    background: #fff;
    flex-wrap: wrap;
}
.pvb-search__wrap {
    position: relative;
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 140px;
}
.pvb-search__icon {
    position: absolute;
    left: .5rem;
    color: var(--pvb-muted);
    pointer-events: none;
}
.pvb-search__input {
    width: 100%;
    padding: .35rem .35rem .35rem 1.9rem;
    border: 1px solid var(--pvb-border);
    border-radius: var(--pvb-radius);
    font-size: .85rem;
    background: var(--pvb-bg);
    outline: none;
    transition: border-color .12s;
}
.pvb-search__input:focus { border-color: var(--pvb-accent); }
.pvb-search__clear {
    position: absolute;
    right: .4rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--pvb-muted);
    font-size: .85rem;
    line-height: 1;
    padding: 0 .15rem;
}
.pvb-search__nav {
    display: flex;
    align-items: center;
    gap: .25rem;
}
.pvb-search__count {
    font-size: .76rem;
    color: var(--pvb-muted);
    white-space: nowrap;
    min-width: 4rem;
}

/* Toolbar */
.pvb-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 .7rem;
    height: 42px;
    background: #fff;
    border-bottom: 1px solid var(--pvb-border);
    gap: .4rem;
    flex-wrap: wrap;
}
.pvb-toolbar__left,
.pvb-toolbar__right {
    display: flex;
    align-items: center;
    gap: .3rem;
}

/* Shared button */
.pvb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 .45rem;
    background: var(--pvb-hover);
    border: 1px solid var(--pvb-border);
    border-radius: 4px;
    cursor: pointer;
    font-size: .82rem;
    color: var(--pvb-text);
    text-decoration: none;
    transition: background .12s;
    line-height: 1;
}
.pvb-btn:hover { background: #ddd9d3; }
.pvb-btn--sm { min-width: 24px; height: 24px; font-size: .8rem; }

.pvb-page-info {
    display: flex;
    align-items: center;
    gap: .3rem;
    font-size: .83rem;
    color: var(--pvb-muted);
    white-space: nowrap;
}
.pvb-page-input {
    width: 3rem;
    padding: .2rem .3rem;
    border: 1px solid var(--pvb-border);
    border-radius: 4px;
    font-size: .83rem;
    text-align: center;
    background: var(--pvb-bg);
}
.pvb-zoom-label {
    font-size: .78rem;
    color: var(--pvb-muted);
    min-width: 2.8rem;
    text-align: center;
}

/* Canvas wrap */
.pvb-canvas-wrap {
    position: relative;
    overflow: auto;
    background: #777;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}
.pvb-canvas {
    display: block;
    margin: 1rem auto;
    box-shadow: 0 4px 18px rgba(0,0,0,.3);
    background: #fff;
}

/* Text layer */
.pvb-text-layer {
    position: absolute;
    overflow: hidden;
    pointer-events: none;
    opacity: 1;
}
.pvb-text-layer span {
    position: absolute;
    white-space: pre;
    color: transparent;
    transform-origin: 0 0;
}
.pvb-text-layer .pvb-hl {
    background: rgba(255,210,50,.55);
    border-radius: 2px;
}
.pvb-text-layer .pvb-hl--cur {
    background: rgba(255,140,0,.70);
    outline: 2px solid rgba(255,140,0,.9);
}


@media (max-width: 640px) {

    /* Stack layout vertically, sidebar moves to bottom */
    .pvb-layout {
        flex-direction: column;
    }

    .pvb-sidebar {
        width: 100%;
        height: auto !important;
        border-right: none;
        border-top: 1px solid var(--pvb-border);
        order: 2;
        max-height: 220px;
    }

    .pvb-main {
        order: 1;
    }

    /* Taller, more tappable toolbar */
    .pvb-toolbar {
        height: auto;
        padding: .6rem .7rem;
        gap: .5rem;
    }

    .pvb-btn {
        min-width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .pvb-btn--sm {
        min-width: 32px;
        height: 32px;
    }

    .pvb-page-input {
        width: 3.2rem;
        padding: .3rem .3rem;
        font-size: .9rem;
    }

    .pvb-page-info {
        font-size: .88rem;
    }

    .pvb-zoom-label {
        font-size: .85rem;
    }

    /* Search bar a bit taller too */
    .pvb-search {
        padding: .55rem .7rem;
    }

    .pvb-search__input {
        font-size: .9rem;
        padding: .45rem .45rem .45rem 1.9rem;
    }

     .pvb-canvas-wrap {
        justify-content: flex-start;
    }
}