/* ===============================
   ROOT VIEWER WRAPPER
================================ */
.epaper-viewer-wrapper {
    display: flex;
    width: 100%;
    height: calc(100vh - 100px);
    overflow: hidden;
    box-sizing: border-box;
}

/* ===============================
   LEFT THUMBNAIL PANEL (FIXED)
================================ */
.epaper-sidebar {
    width: 160px;
    min-width: 160px;
    max-width: 160px;

    flex: 0 0 160px;
    flex-shrink: 0;

    overflow-y: auto;
    overflow-x: hidden;

    background: #f5f5f5;
    padding: 10px;
    border-right: 1px solid #ddd;
    box-sizing: border-box;
}

.epaper-sidebar canvas {
    width: 100%;
    margin-bottom: 10px;
    cursor: pointer;
    border: 1px solid #ccc;
    box-sizing: border-box;
}

/* ===============================
   RIGHT VIEWER PANEL
================================ */
.epaper-main {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #ffffff;
}

/* ===============================
   TOOLBAR
================================ */
.epaper-toolbar {
    flex: 0 0 auto;
    padding: 8px;
    background: #fafafa;
    border-bottom: 1px solid #ddd;
    text-align: center;
}

.epaper-toolbar button {
    padding: 6px 10px;
    margin: 0 4px;
    font-size: 14px;
    cursor: pointer;
}

/* ===============================
   SCROLL CONTAINER
================================ */
.epaper-canvas-wrap {
    flex: 1 1 auto;
    min-width: 0;
    overflow: auto;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    background: #ffffff;
    cursor: grab;
}

.epaper-canvas-wrap.is-panning {
    cursor: grabbing;
    user-select: none;
}

/* ===============================
   PDF CANVAS
================================ */
#epaper-canvas {
    display: block;
    max-width: none;
    width: auto;
    height: auto;
}

/* ===============================
   MOBILE / TABLET
================================ */
@media (max-width: 1024px) {

    .epaper-viewer-wrapper {
        flex-direction: column;
        height: auto;
    }

    .epaper-main {
        order: 1;
    }

    .epaper-sidebar {
        order: 2;
        width: 100%;
        min-width: 100%;
        max-width: 100%;
        display: flex;
        flex-direction: row;
        overflow-x: auto;
        overflow-y: hidden;
        border-right: none;
        border-top: 1px solid #ddd;
    }

    .epaper-sidebar canvas {
        width: 90px;
        margin-right: 8px;
        margin-bottom: 0;
        flex-shrink: 0;
    }
    .epaper-canvas-wrap {
        justify-content: flex-start; /* no centering on mobile */
    }
}



@media (max-width: 480px) {
.epaper-toolbar button {
    padding: 0px 6px;
    margin: 0 3px;
    font-size: 13px;
    cursor: pointer;
}
.epaper-sidebar canvas {
        width: 35px;
        margin-right: 8px;
        margin-bottom: 0;
        flex-shrink: 0;
    }
}