/**
 * WP Interactive E-Paper — Frontend Viewer Styles.
 *
 * Two modes:
 *   1. OVERVIEW — Horizontal thumbnail grid of all pages
 *   2. PAGE VIEW — Full-width newspaper page with zoom/pan
 *
 * @since 1.0.0
 */

/* ==========================================================================
   CSS Variables (Design Tokens)
   ========================================================================== */

:root {
    --wpiep-bg: #0f1419;
    --wpiep-surface: #1a1f2e;
    --wpiep-surface-hover: #242b3d;
    --wpiep-border: #2d3548;
    --wpiep-text: #e8eaed;
    --wpiep-text-muted: #8b92a5;
    --wpiep-accent: #4a9eff;
    --wpiep-accent-hover: #6db3ff;
    --wpiep-hotspot-hover: rgba(74, 158, 255, 0.2);
    --wpiep-hotspot-border: rgba(74, 158, 255, 0.5);
    --wpiep-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --wpiep-radius: 8px;
    --wpiep-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --wpiep-toolbar-height: 50px;
    --wpiep-strip-height: 80px;
}

/* ==========================================================================
   Shared — Base Container & Theme Overrides
   ========================================================================== */

.wpiep-viewer {
    background: var(--wpiep-bg);
    color: var(--wpiep-text);
    font-family: var(--wpiep-font);
    margin: 0;
    padding: 0;
    position: relative;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.wpiep-viewer * {
    box-sizing: border-box;
}

/* Override theme container styles */
.wpiep-viewer-page .site-content,
.wpiep-viewer-page .entry-content,
.wpiep-viewer-page main,
.wpiep-viewer-page #primary,
.wpiep-viewer-page .content-area,
.wpiep-viewer-page .wpiep-main-content {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
    width: 100% !important;
}

/* ==========================================================================
   Shared — Header / Toolbar
   ========================================================================== */

.wpiep-viewer-header,
.wpiep-viewer-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: var(--wpiep-toolbar-height);
    background: var(--wpiep-surface);
    border-bottom: 1px solid var(--wpiep-border);
    flex-shrink: 0;
    gap: 16px;
    z-index: 10;
}

.wpiep-viewer-header-left,
.wpiep-toolbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.wpiep-viewer-title,
.wpiep-toolbar-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--wpiep-text);
    margin: 0;
    padding: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 250px;
    line-height: 1.4;
}

.wpiep-viewer-date {
    font-size: 12px;
    color: var(--wpiep-accent);
    font-weight: 500;
    white-space: nowrap;
    background: rgba(74, 158, 255, 0.1);
    padding: 3px 10px;
    border-radius: 12px;
}

.wpiep-viewer-header-center,
.wpiep-toolbar-center {
    flex-shrink: 0;
}

.wpiep-viewer-page-indicator {
    font-size: 13px;
    color: var(--wpiep-text-muted);
}

.wpiep-viewer-page-indicator strong {
    color: var(--wpiep-text);
    font-weight: 700;
}

.wpiep-viewer-header-right,
.wpiep-toolbar-right {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

/* ── Toolbar Buttons ── */

.wpiep-toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border: none;
    border-radius: 4px;
    color: var(--wpiep-text-muted);
    background: transparent;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
}

.wpiep-toolbar-btn:hover {
    background: var(--wpiep-surface-hover);
    color: var(--wpiep-text);
}

.wpiep-back-btn {
    color: var(--wpiep-accent);
    font-weight: 600;
}

.wpiep-back-btn:hover {
    color: var(--wpiep-accent-hover);
}

.wpiep-toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--wpiep-border);
    margin: 0 4px;
}

/* ── Page Switcher (in toolbar) ── */

.wpiep-page-switcher {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-wrap: wrap;
}

/* Dark-themed numbered pagination for page view toolbar */
.wpiep-pag-btn-dark,
.wpiep-pag-num-dark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    font-family: var(--wpiep-font);
    border: 1px solid var(--wpiep-border);
    background: transparent;
    color: var(--wpiep-text-muted);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: 30px;
    text-align: center;
    white-space: nowrap;
    border-radius: 3px;
}

.wpiep-pag-btn-dark:hover,
.wpiep-pag-num-dark:hover {
    background: var(--wpiep-surface-hover);
    color: var(--wpiep-text);
    text-decoration: none;
}

.wpiep-pag-active-dark {
    background: var(--wpiep-accent) !important;
    color: #fff !important;
    border-color: var(--wpiep-accent) !important;
    font-weight: 700;
}

/* ── Zoom Controls ── */

.wpiep-zoom-controls {
    display: flex;
    align-items: center;
    gap: 2px;
    background: var(--wpiep-bg);
    padding: 3px 5px;
    border-radius: 6px;
    border: 1px solid var(--wpiep-border);
}

.wpiep-zoom-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: none;
    background: transparent;
    color: var(--wpiep-text-muted);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0;
}

.wpiep-zoom-btn:hover {
    background: var(--wpiep-surface-hover);
    color: var(--wpiep-text);
}

.wpiep-zoom-btn:active {
    transform: scale(0.95);
}

.wpiep-zoom-level {
    font-size: 11px;
    font-weight: 600;
    color: var(--wpiep-text);
    min-width: 40px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* Edition navigation buttons (prev/next edition by date) */
.wpiep-edition-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border: 1px solid var(--wpiep-border);
    border-radius: 4px;
    color: var(--wpiep-text-muted);
    background: transparent;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
}

.wpiep-edition-nav-btn:hover {
    background: var(--wpiep-surface-hover);
    color: var(--wpiep-text);
    border-color: var(--wpiep-accent);
}

.wpiep-archive-link {
    color: var(--wpiep-accent);
    font-weight: 600;
    border: 1px solid rgba(74, 158, 255, 0.25);
    border-radius: 4px;
    padding: 5px 12px;
}

.wpiep-archive-link:hover {
    background: rgba(74, 158, 255, 0.1);
    border-color: var(--wpiep-accent);
}


/* =========================================================================
   MODE 1: OVERVIEW — All pages as clickable thumbnails
   ========================================================================== */

.wpiep-viewer--overview {
    min-height: 100vh;
}

.wpiep-overview-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 24px;
    padding: 32px 24px 48px;
    direction: rtl; /* RTL: Page 1 on right, last page on left */
}

.wpiep-overview-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--wpiep-text);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    border-radius: var(--wpiep-radius);
    overflow: hidden;
    cursor: pointer;
    flex: 1 1 0;
    min-width: 180px;
    max-width: 400px;
}

.wpiep-overview-card:hover {
    transform: translateY(-6px);
    z-index: 2;
}

.wpiep-overview-card:hover .wpiep-overview-card-image {
    box-shadow: 0 8px 32px rgba(74, 158, 255, 0.15), 0 4px 16px rgba(0, 0, 0, 0.3);
    border-color: var(--wpiep-accent);
}

.wpiep-overview-card:hover .wpiep-overview-card-label {
    color: var(--wpiep-accent);
}

.wpiep-overview-card-image {
    width: 100%;
    border: 2px solid var(--wpiep-border);
    border-radius: var(--wpiep-radius);
    overflow: hidden;
    background: #222;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
    box-shadow: var(--wpiep-shadow);
}

.wpiep-overview-card-image img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.wpiep-overview-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 3/4;
    background: var(--wpiep-surface);
    color: var(--wpiep-text-muted);
    font-size: 48px;
    font-weight: 700;
}

.wpiep-overview-card-label {
    margin-top: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--wpiep-text-muted);
    transition: color 0.2s ease;
    direction: ltr; /* Labels in LTR even in RTL grid */
}


/* =========================================================================
   MODE 2: PAGE VIEW — Full-width newspaper page
   ========================================================================== */

.wpiep-viewer--page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ── Page Container: Full-width image ── */

.wpiep-page-container {
    flex: 1;
    overflow: auto;
    background: var(--wpiep-bg);
}

.wpiep-viewer--page .wpiep-panzoom-parent {
    width: 100%;
    overflow: hidden;
}

.wpiep-viewer--page .wpiep-panzoom-element {
    position: relative;
    display: block;
    width: 100%;
    line-height: 0;
    transform-origin: 0 0;  /* Top-left origin for panzoom */
}

.wpiep-viewer--page .wpiep-page-image {
    display: block;
    width: 100%;
    height: auto;
    user-select: none;
    -webkit-user-drag: none;
}


/* =========================================================================
   Clickable Hotspot Overlay
   ========================================================================== */

.wpiep-hotspot-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.wpiep-hotspot {
    position: absolute;
    display: block;
    pointer-events: auto;
    border: 2px solid transparent;
    background: transparent;
    transition: all 0.2s ease;
    cursor: pointer;
    text-decoration: none;
    z-index: 2;
}

.wpiep-hotspot:hover {
    background: var(--wpiep-hotspot-hover);
    border-color: var(--wpiep-hotspot-border);
    box-shadow: inset 0 0 0 1px var(--wpiep-hotspot-border);
}

/* ── Hotspot Tooltip ── */

.wpiep-hotspot-tooltip {
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.88);
    color: #fff;
    font-size: 12px;
    font-family: var(--wpiep-font);
    line-height: 1.4;
    padding: 5px 10px;
    border-radius: 4px;
    white-space: nowrap;
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s ease, visibility 0.15s ease;
    pointer-events: none;
    z-index: 10;
}

.wpiep-hotspot-tooltip:empty {
    display: none;
}

.wpiep-hotspot:hover .wpiep-hotspot-tooltip {
    opacity: 1;
    visibility: visible;
}

.wpiep-hotspot-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: rgba(0, 0, 0, 0.88);
}


/* =========================================================================
   Bottom Page Thumbnail Strip (Page View Mode)
   ========================================================================== */

.wpiep-page-strip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    height: var(--wpiep-strip-height);
    background: var(--wpiep-surface);
    border-top: 1px solid var(--wpiep-border);
    overflow-x: auto;
    overflow-y: hidden;
    flex-shrink: 0;
    justify-content: center;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--wpiep-border) transparent;
}

.wpiep-page-strip::-webkit-scrollbar {
    height: 4px;
}

.wpiep-page-strip::-webkit-scrollbar-track {
    background: transparent;
}

.wpiep-page-strip::-webkit-scrollbar-thumb {
    background: var(--wpiep-border);
    border-radius: 2px;
}

.wpiep-page-thumb {
    position: relative;
    flex-shrink: 0;
    width: 46px;
    height: 60px;
    border: 2px solid var(--wpiep-border);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--wpiep-bg);
}

.wpiep-page-thumb:hover {
    border-color: var(--wpiep-accent);
    transform: translateY(-2px);
}

.wpiep-page-thumb img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.wpiep-thumb-active {
    border-color: var(--wpiep-accent);
    box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.3);
}

.wpiep-thumb-num {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 9px;
    font-weight: 700;
    color: #fff;
    background: rgba(0, 0, 0, 0.6);
    padding: 1px 0;
    line-height: 1.4;
}

.wpiep-thumb-placeholder {
    font-size: 14px;
    font-weight: 700;
    color: var(--wpiep-text-muted);
}


/* =========================================================================
   Empty/Error States
   ========================================================================== */

.wpiep-viewer-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    padding: 40px;
    text-align: center;
    background: var(--wpiep-bg);
}

.wpiep-viewer-empty p {
    color: var(--wpiep-text-muted);
    font-size: 16px;
}

.wpiep-error {
    color: #d63638;
    padding: 20px;
    text-align: center;
}


/* =========================================================================
   Responsive
   ========================================================================== */

@media screen and (max-width: 768px) {
    /* ── Toolbar ── */
    .wpiep-viewer-header,
    .wpiep-viewer-toolbar {
        padding: 0 10px;
        height: 44px;
        gap: 8px;
    }

    .wpiep-viewer-title,
    .wpiep-toolbar-title {
        font-size: 13px;
        max-width: 100px;
    }

    .wpiep-viewer-date {
        display: none;
    }

    .wpiep-toolbar-divider {
        display: none;
    }

    .wpiep-back-btn span,
    .wpiep-back-btn svg + * {
        display: none; /* Hide text, keep icon */
    }

    .wpiep-zoom-controls {
        gap: 0;
        padding: 2px;
    }

    .wpiep-zoom-btn {
        width: 26px;
        height: 26px;
    }

    .wpiep-zoom-level {
        font-size: 10px;
        min-width: 34px;
    }

    /* ── Overview ── */
    .wpiep-overview-grid {
        gap: 12px;
        padding: 16px 12px 24px;
    }

    .wpiep-overview-card {
        min-width: 140px;
    }

    .wpiep-overview-card-label {
        font-size: 12px;
    }

    /* ── Page Strip ── */
    .wpiep-page-strip {
        height: 64px;
        padding: 6px 10px;
        gap: 6px;
        justify-content: flex-start;
    }

    .wpiep-page-thumb {
        width: 38px;
        height: 50px;
    }
}

@media screen and (max-width: 480px) {
    .wpiep-viewer-header-center,
    .wpiep-overview-hint {
        display: none;
    }

    .wpiep-overview-grid {
        flex-direction: column;
        align-items: center;
    }

    .wpiep-overview-card {
        max-width: 100%;
        width: 100%;
    }
}


/* =========================================================================
   RTL Support
   ========================================================================== */

[dir="rtl"] .wpiep-back-btn svg {
    transform: scaleX(-1);
}

[dir="rtl"] .wpiep-page-switcher .wpiep-toolbar-btn:first-child svg {
    transform: scaleX(-1);
}

[dir="rtl"] .wpiep-page-switcher .wpiep-toolbar-btn:last-child svg {
    transform: scaleX(-1);
}


/* =========================================================================
   Print — Hide controls, show image only
   ========================================================================== */

@media print {
    .wpiep-viewer-header,
    .wpiep-viewer-toolbar,
    .wpiep-zoom-controls,
    .wpiep-page-strip {
        display: none !important;
    }

    .wpiep-viewer {
        background: #fff;
        min-height: auto;
    }

    .wpiep-page-image {
        width: 100%;
        max-height: none;
        box-shadow: none;
    }
}