/* ============================================================
   PDF Piero v4 — Frontend CSS
   ============================================================ */

.pdf-piero-wrapper {
    --pp-cover-h:        260px;
    --pp-card-p:         20px;
    --pp-card-gap:       20px;
    --pp-card-radius:    4px;
    --pp-cols:           3;
    --pp-font:           inherit;
    --pp-title-sz:       17px;
    --pp-title-w:        600;
    --pp-meta-sz:        12px;
    --pp-desc-sz:        13px;
    --pp-card-bg:        #ffffff;
    --pp-card-border:    #e0e0e0;
    --pp-title-color:    #1a1a1a;
    --pp-meta-color:     #666666;
    --pp-desc-color:     #555555;
    --pp-cat-bg:         #f0f0f0;
    --pp-cat-color:      #444444;
    --pp-btn-bg:         #1a1a1a;
    --pp-btn-color:      #ffffff;
    --pp-placeholder-bg: #f5f5f5;
    --pp-filter-bg:      #f8f8f8;
    --pp-filter-border:  #d0d0d0;
    --pp-filter-text:    #333333;
    --pp-filter-active:  #1a1a1a;
    font-family: var(--pp-font);
    width: 100%;
    box-sizing: border-box;
}

/* ---- Filters bar ---- */
.pdf-piero-filters {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 28px;
    padding: 14px 16px;
    background: var(--pp-filter-bg);
    border: 1px solid var(--pp-filter-border);
    border-radius: var(--pp-card-radius);
    box-sizing: border-box;
}

.pdf-piero-search-form {
    display: flex;
    align-items: center;
    border: 1px solid var(--pp-filter-border);
    border-radius: calc(var(--pp-card-radius) - 1px);
    overflow: hidden;
    background: #ffffff;
    flex: 1;
    min-width: 160px;
    max-width: 280px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.06);
}

.pdf-piero-search {
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    padding: 9px 12px !important;
    font-size: 13px !important;
    font-family: var(--pp-font) !important;
    color: var(--pp-filter-text) !important;
    background: transparent !important;
    flex: 1;
    margin: 0 !important;
    min-height: unset !important;
    height: auto !important;
    width: 100% !important;
    display: block !important;
}

.pdf-piero-search::placeholder {
    color: #aaa;
}

.pdf-piero-search-btn {
    background: none;
    border: none;
    border-left: 1px solid var(--pp-filter-border);
    padding: 9px 12px;
    cursor: pointer;
    color: var(--pp-filter-text);
    display: flex;
    align-items: center;
    line-height: 1;
    opacity: 0.6;
    transition: opacity 0.15s;
}
.pdf-piero-search-btn:hover { opacity: 1; background: rgba(0,0,0,0.04); }

/* Category filters */
.pdf-piero-cat-filters {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

.pdf-piero-cat-btn {
    font-family: var(--pp-font);
    font-size: 11px;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    font-weight: 600;
    padding: 6px 12px;
    border: 1px solid var(--pp-filter-border);
    border-radius: 2px;
    text-decoration: none !important;
    color: var(--pp-filter-text) !important;
    background: #ffffff;
    transition: all 0.15s;
    display: inline-block;
    line-height: 1.4;
    cursor: pointer;
}

.pdf-piero-cat-btn:hover {
    background: var(--pp-filter-active);
    border-color: var(--pp-filter-active);
    color: #ffffff !important;
    text-decoration: none !important;
}

.pdf-piero-cat-btn.active {
    background: var(--pp-filter-active);
    border-color: var(--pp-filter-active);
    color: #ffffff !important;
}

/* Layout toggle */
.pdf-piero-layout-toggle {
    margin-left: auto;
    display: flex;
    gap: 4px;
    align-items: center;
}

.pdf-piero-toggle-btn {
    background: #ffffff;
    border: 1px solid var(--pp-filter-border);
    border-radius: 2px;
    padding: 7px 9px;
    cursor: pointer;
    color: var(--pp-filter-text);
    display: flex;
    align-items: center;
    transition: all 0.15s;
    line-height: 1;
}

.pdf-piero-toggle-btn:hover {
    background: var(--pp-filter-active);
    border-color: var(--pp-filter-active);
    color: #ffffff;
}

.pdf-piero-toggle-btn.active {
    background: var(--pp-filter-active);
    border-color: var(--pp-filter-active);
    color: #ffffff;
}

/* ---- Grid ---- */
.pdf-piero-grid {
    display: grid;
    grid-template-columns: repeat(var(--pp-cols, 3), 1fr);
    gap: var(--pp-card-gap, 20px);
}

/* ---- List ---- */
.pdf-piero-wrapper[data-layout="list"] .pdf-piero-grid {
    grid-template-columns: 1fr;
    gap: 12px;
}

.pdf-piero-wrapper[data-layout="list"] .pdf-piero-card {
    flex-direction: row;
    align-items: stretch;
}

.pdf-piero-wrapper[data-layout="list"] .pdf-piero-card-cover {
    width: 140px;
    min-width: 140px;
    height: auto !important;
    aspect-ratio: unset;
    border-bottom: none;
    border-right: 1px solid var(--pp-card-border);
}

.pdf-piero-wrapper[data-layout="list"] .pdf-piero-card-cover img,
.pdf-piero-wrapper[data-layout="list"] .pp-pdf-canvas {
    height: 100% !important;
    width: 100% !important;
}

/* ---- Card ---- */
.pdf-piero-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--pp-card-border);
    border-radius: var(--pp-card-radius);
    overflow: hidden;
    transition: box-shadow 0.2s, transform 0.2s;
    background: var(--pp-card-bg);
    font-family: var(--pp-font);
}

.pdf-piero-card:hover {
    box-shadow: 0 6px 24px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

/* ---- Cover ---- */
.pdf-piero-card-cover {
    position: relative;
    width: 100%;
    aspect-ratio: var(--pp-cover-aspect, 3/4);
    overflow: hidden;
    background: var(--pp-placeholder-bg);
    flex-shrink: 0;
}

.pdf-piero-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
}

/* Canvas fills cover naturally */
.pp-pdf-canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
    object-fit: cover;
    object-position: top;
}

/* Loader */
.pp-canvas-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.25;
    pointer-events: none;
}

/* Placeholder */
.pdf-piero-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--pp-meta-color);
    opacity: 0.4;
    font-family: var(--pp-font);
    font-size: 11px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Category badge */
.pdf-piero-card-cat {
    position: absolute;
    top: 10px;
    left: 10px;
    font-family: var(--pp-font);
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 700;
    padding: 4px 10px;
    background: var(--pp-cat-bg);
    color: var(--pp-cat-color);
    border-radius: 2px;
    line-height: 1.4;
    border: 1px solid rgba(0,0,0,0.08);
}

/* ---- Card body ---- */
.pdf-piero-card-body {
    padding: var(--pp-card-p, 20px);
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    font-family: var(--pp-font);
}

.pdf-piero-card-title {
    font-family: var(--pp-font) !important;
    font-size: var(--pp-title-sz, 17px) !important;
    font-weight: var(--pp-title-w, 600) !important;
    line-height: 1.3 !important;
    margin: 0 0 4px !important;
    color: var(--pp-title-color) !important;
    padding: 0 !important;
}

.pdf-piero-card-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.pdf-piero-card-meta p {
    font-family: var(--pp-font) !important;
    font-size: var(--pp-meta-sz, 12px) !important;
    margin: 0 !important;
    line-height: 1.5 !important;
    color: var(--pp-meta-color) !important;
    padding: 0 !important;
}

.pp-label {
    font-size: 10px !important;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 700 !important;
    color: var(--pp-meta-color) !important;
    opacity: 0.55;
    margin-right: 5px;
    display: inline;
}

.pdf-piero-card-desc {
    font-family: var(--pp-font) !important;
    font-size: var(--pp-desc-sz, 13px) !important;
    line-height: 1.65 !important;
    margin: 0 !important;
    color: var(--pp-desc-color) !important;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    padding: 0 !important;
}

/* Download button */
.pdf-piero-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: auto;
    padding: 9px 16px;
    font-family: var(--pp-font) !important;
    font-size: 11px !important;
    font-weight: 700 !important;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    text-decoration: none !important;
    border-radius: var(--pp-card-radius);
    border: 1px solid var(--pp-btn-bg);
    background: var(--pp-btn-bg);
    color: var(--pp-btn-color) !important;
    align-self: flex-start;
    transition: opacity 0.15s, transform 0.15s;
    line-height: 1;
    cursor: pointer;
}

.pdf-piero-card-btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
    text-decoration: none !important;
    color: var(--pp-btn-color) !important;
}

/* ---- Empty state ---- */
.pdf-piero-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 64px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    font-family: var(--pp-font);
    font-size: 15px;
    color: var(--pp-meta-color);
    opacity: 0.5;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .pdf-piero-grid { grid-template-columns: repeat(2, 1fr) !important; }
}
@media (max-width: 540px) {
    .pdf-piero-grid { grid-template-columns: 1fr !important; }
    .pdf-piero-filters { gap: 8px; }
    .pdf-piero-search-form { max-width: 100%; }
    .pdf-piero-wrapper[data-layout="list"] .pdf-piero-card { flex-direction: column; }
    .pdf-piero-wrapper[data-layout="list"] .pdf-piero-card-cover {
        width: 100%;
        height: 200px !important;
        border-right: none;
        border-bottom: 1px solid var(--pp-card-border);
    }
}