/* ==========================================================================
   magview.css — Reusable PDF viewer component
   Uses project design tokens from base.css (--uv-*)
   Usage: {% include "fragments/magview.html" with pdf_url=... title=... %}
   ========================================================================== */

/* ─── Viewer shell ─── */
.mg-viewer {
    display: flex;
    flex-direction: column;
    height: 680px;
    background: var(--uv-bg-warm);
    border: 1px solid var(--uv-border);
    border-radius: 10px;
    overflow: hidden;
}

/* ─── Toolbar ─── */
.mg-toolbar {
    height: 48px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    background: #fff;
    border-bottom: 1px solid var(--uv-border);
    gap: 4px;
    flex-shrink: 0;
    z-index: 10;
}

.mg-toolbar__title {
    font-size: 13px;
    font-weight: 600;
    color: var(--uv-text-dark);
    margin-right: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mg-toolbar__title svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: var(--uv-primary);
}

.mg-sep {
    width: 1px;
    height: 22px;
    background: var(--uv-border);
    margin: 0 4px;
    flex-shrink: 0;
}

/* ─── Buttons ─── */
.mg-btn {
    appearance: none;
    border: none;
    background: transparent;
    color: var(--uv-text-muted);
    width: 32px;
    height: 32px;
    border-radius: var(--uv-radius);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all .2s;
    flex-shrink: 0;
}

.mg-btn:hover {
    background: var(--uv-bg-warm);
    color: var(--uv-primary);
}

.mg-btn:active {
    transform: scale(.92);
}

.mg-btn.is-active {
    background: rgba(13, 110, 253, .08);
    color: var(--uv-primary);
}

.mg-btn:disabled {
    opacity: .3;
    cursor: default;
    pointer-events: none;
}

.mg-btn svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    stroke-width: 1.8;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Tooltips */
.mg-btn[data-tip] {
    position: relative;
}

.mg-btn[data-tip]::after {
    content: attr(data-tip);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: var(--uv-dark);
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all .15s;
    z-index: 50;
}

.mg-btn[data-tip]:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ─── Page indicator ─── */
.mg-pages {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--uv-text-muted);
    user-select: none;
    flex-shrink: 0;
}

.mg-pages__input {
    width: 40px;
    height: 26px;
    text-align: center;
    border: 1px solid var(--uv-border);
    border-radius: 4px;
    font-size: 13px;
    color: var(--uv-text-dark);
    background: #fff;
    outline: none;
    font-family: inherit;
    transition: border-color .2s;
}

.mg-pages__input:focus {
    border-color: var(--uv-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, .15);
}

/* ─── Zoom ─── */
.mg-zoom-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.mg-zoom-val {
    font-size: 11px;
    color: var(--uv-text-muted);
    min-width: 34px;
    text-align: center;
    user-select: none;
}

/* ─── Body ─── */
.mg-body {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* ─── Sidebar (thumbnails) ─── */
.mg-sidebar {
    width: 180px;
    background: #fff;
    border-right: 1px solid var(--uv-border);
    overflow-y: auto;
    padding: 10px 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
    transition: margin-left var(--uv-transition), opacity var(--uv-transition);
    scrollbar-width: thin;
    scrollbar-color: var(--uv-border) transparent;
}

.mg-sidebar.is-hidden {
    margin-left: -180px;
    opacity: 0;
    pointer-events: none;
}

.mg-thumb {
    cursor: pointer;
    border-radius: var(--uv-radius);
    overflow: hidden;
    border: 2px solid transparent;
    transition: border-color .2s, box-shadow .2s;
    flex-shrink: 0;
    position: relative;
}

.mg-thumb:hover {
    border-color: rgba(13, 110, 253, .3);
}

.mg-thumb.is-active {
    border-color: var(--uv-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, .15);
}

.mg-thumb canvas {
    display: block;
    width: 100%;
    height: auto;
    background: #fff;
}

.mg-thumb__num {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 10px;
    font-weight: 600;
    color: #fff;
    padding: 10px 0 3px;
    background: linear-gradient(transparent, rgba(0, 0, 0, .55));
}

/* ─── Viewport ─── */
.mg-viewport {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    background: #e9ecef;
}

/* Subtle texture */
.mg-viewport::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.025'/%3E%3C/svg%3E");
    pointer-events: none;
}

/* Page spread */
.mg-spread {
    display: flex;
    gap: 4px;
    position: relative;
    z-index: 1;
    transition: transform .35s cubic-bezier(.22, 1, .36, 1), opacity .25s;
}

.mg-spread.flip-left {
    animation: mg-flipL .35s cubic-bezier(.22, 1, .36, 1);
}

.mg-spread.flip-right {
    animation: mg-flipR .35s cubic-bezier(.22, 1, .36, 1);
}

@keyframes mg-flipL {
    0%   { transform: translateX(30px); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}

@keyframes mg-flipR {
    0%   { transform: translateX(-30px); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}

/* Single page */
.mg-page {
    background: #fff;
    box-shadow: var(--uv-shadow-md);
    border-radius: 2px;
    overflow: hidden;
    line-height: 0;
    position: relative;
}

.mg-page canvas {
    display: block;
}

/* Spine shadow between spread pages */
.mg-spread[data-pages="2"] .mg-page:first-child::after {
    content: '';
    position: absolute;
    top: 0;
    right: -2px;
    bottom: 0;
    width: 5px;
    background: linear-gradient(90deg, rgba(0, 0, 0, .1), transparent);
    pointer-events: none;
}

.mg-spread[data-pages="2"] .mg-page:last-child::before {
    content: '';
    position: absolute;
    top: 0;
    left: -2px;
    bottom: 0;
    width: 5px;
    background: linear-gradient(270deg, rgba(0, 0, 0, .1), transparent);
    pointer-events: none;
    z-index: 1;
}

/* ─── Navigation arrows ─── */
.mg-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    width: 40px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, .85);
    border: 1px solid var(--uv-border);
    border-radius: var(--uv-radius);
    color: var(--uv-text-muted);
    cursor: pointer;
    transition: all .2s;
    backdrop-filter: blur(6px);
}

.mg-nav:hover {
    background: #fff;
    color: var(--uv-primary);
    border-color: rgba(13, 110, 253, .3);
    box-shadow: var(--uv-shadow-sm);
}

.mg-nav:active {
    transform: translateY(-50%) scale(.94);
}

.mg-nav--prev { left: 12px; }
.mg-nav--next { right: 12px; }

.mg-nav svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 1.8;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.mg-nav:disabled {
    opacity: .2;
    cursor: default;
    pointer-events: none;
}

/* ─── Loader ─── */
.mg-loader {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 20;
    background: #e9ecef;
    transition: opacity .4s;
}

.mg-loader.is-hidden {
    opacity: 0;
    pointer-events: none;
}

.mg-loader__spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--uv-border);
    border-top-color: var(--uv-primary);
    border-radius: 50%;
    animation: mg-spin .8s linear infinite;
}

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

.mg-loader__text {
    font-size: 13px;
    color: var(--uv-text-muted);
    font-weight: 500;
}

.mg-loader__bar {
    width: 180px;
    height: 3px;
    background: var(--uv-border);
    border-radius: 2px;
    overflow: hidden;
}

.mg-loader__fill {
    height: 100%;
    background: var(--uv-primary);
    border-radius: 2px;
    width: 0%;
    transition: width .3s;
}

/* ─── Zoomed state ─── */
.mg-viewport.is-zoomed {
    overflow: auto;
    cursor: grab;
}

.mg-viewport.is-zoomed:active {
    cursor: grabbing;
}

.mg-viewport.is-zoomed .mg-spread {
    margin: 20px;
}

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

/* ─── Responsive ─── */
@media (max-width: 767.98px) {
    .mg-viewer {
        height: 450px;
    }

    .mg-sidebar {
        display: none !important;
    }

    .mg-toolbar__title span {
        display: none;
    }

    .mg-nav {
        width: 34px;
        height: 56px;
    }

    .mg-nav--prev { left: 6px; }
    .mg-nav--next { right: 6px; }

    .mg-btn[data-tip]::after {
        display: none;
    }

    .mg-hide-mobile {
        display: none !important;
    }
}