/* =========================================================
   BookShelf Manager – Frontend CSS
   Alle Farben/Radien über CSS-Variablen steuerbar
   ========================================================= */

:root {
    --bsm-accent:   #2563eb;
    --bsm-bg:       #ffffff;
    --bsm-text:     #1e293b;
    --bsm-card-bg:  #f8fafc;
    --bsm-radius:   12px;

    /* Abgeleitete Werte */
    --bsm-accent-light: color-mix(in srgb, var(--bsm-accent) 15%, transparent);
    --bsm-accent-hover: color-mix(in srgb, var(--bsm-accent) 85%, #000);
    --bsm-border:   color-mix(in srgb, var(--bsm-text) 15%, transparent);
    --bsm-shadow:   0 2px 12px color-mix(in srgb, var(--bsm-text) 8%, transparent);
    --bsm-shadow-lg:0 8px 32px color-mix(in srgb, var(--bsm-text) 12%, transparent);
    --bsm-muted:    color-mix(in srgb, var(--bsm-text) 50%, transparent);
    --bsm-font:     system-ui, -apple-system, "Segoe UI", sans-serif;
    --bsm-transition: 0.2s ease;
}

/* ── Basis ───────────────────────────────────────────────── */
.bsm-library,
.bsm-single-book,
.bsm-pdf-reader,
.bsm-categories,
.bsm-books-grid {
    font-family: var(--bsm-font);
    color: var(--bsm-text);
    box-sizing: border-box;
}
.bsm-library *,
.bsm-single-book * {
    box-sizing: border-box;
}

/* ── Library Header ──────────────────────────────────────── */
.bsm-library-header {
    margin-bottom: 2rem;
    text-align: center;
}
.bsm-lib-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    margin: 0 0 .4rem;
    color: var(--bsm-text);
}
.bsm-lib-sub {
    color: var(--bsm-muted);
    font-size: 1.05rem;
    margin: 0;
}

/* ── Toolbar ─────────────────────────────────────────────── */
.bsm-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .75rem;
    margin-bottom: 1.25rem;
    padding: .75rem 1rem;
    background: var(--bsm-card-bg);
    border: 1px solid var(--bsm-border);
    border-radius: var(--bsm-radius);
}
.bsm-search-wrap {
    position: relative;
    flex: 1 1 200px;
    min-width: 160px;
}
.bsm-search-input {
    width: 100%;
    padding: .55rem .55rem .55rem 2.2rem;
    border: 1px solid var(--bsm-border);
    border-radius: calc(var(--bsm-radius) - 4px);
    font-size: .9rem;
    background: var(--bsm-bg);
    color: var(--bsm-text);
    transition: border-color var(--bsm-transition), box-shadow var(--bsm-transition);
}
.bsm-search-input:focus {
    outline: none;
    border-color: var(--bsm-accent);
    box-shadow: 0 0 0 3px var(--bsm-accent-light);
}
.bsm-search-icon {
    position: absolute;
    left: .6rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: .9rem;
    pointer-events: none;
    opacity: .6;
}
.bsm-filters {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
}
.bsm-filter-select {
    padding: .5rem .75rem;
    border: 1px solid var(--bsm-border);
    border-radius: calc(var(--bsm-radius) - 4px);
    background: var(--bsm-bg);
    color: var(--bsm-text);
    font-size: .875rem;
    cursor: pointer;
    transition: border-color var(--bsm-transition);
}
.bsm-filter-select:focus {
    outline: none;
    border-color: var(--bsm-accent);
}
.bsm-view-toggle {
    display: flex;
    gap: .25rem;
    margin-left: auto;
}
.bsm-view-btn {
    padding: .45rem .7rem;
    border: 1px solid var(--bsm-border);
    border-radius: calc(var(--bsm-radius) - 6px);
    background: var(--bsm-bg);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: all var(--bsm-transition);
    color: var(--bsm-muted);
}
.bsm-view-btn.active,
.bsm-view-btn:hover {
    background: var(--bsm-accent);
    border-color: var(--bsm-accent);
    color: #fff;
}

/* ── Ergebniszahl ────────────────────────────────────────── */
.bsm-result-count {
    font-size: .85rem;
    color: var(--bsm-muted);
    margin: 0 0 1rem;
}

/* ── Grid ────────────────────────────────────────────────── */
.bsm-books-grid {
    display: grid;
    gap: 1.25rem;
}
.bsm-books-grid.bsm-view-grid {
    grid-template-columns: repeat(var(--bsm-cols, 3), 1fr);
}
.bsm-books-grid[data-cols="2"].bsm-view-grid { --bsm-cols: 2; }
.bsm-books-grid[data-cols="3"].bsm-view-grid { --bsm-cols: 3; }
.bsm-books-grid[data-cols="4"].bsm-view-grid { --bsm-cols: 4; }

.bsm-books-grid.bsm-view-list {
    grid-template-columns: 1fr;
}

/* ── Buchkarte ───────────────────────────────────────────── */
.bsm-book-card {
    background: var(--bsm-card-bg);
    border: 1px solid var(--bsm-border);
    border-radius: var(--bsm-radius);
    overflow: hidden;
    transition: transform var(--bsm-transition), box-shadow var(--bsm-transition);
    position: relative;
    display: flex;
    flex-direction: column;
}
.bsm-book-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--bsm-shadow-lg);
}

/* Grid-Karte */
.bsm-book-card.bsm-card-grid .bsm-card-cover-wrap {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--bsm-border);
}
.bsm-book-card.bsm-card-grid .bsm-card-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
}
.bsm-book-card.bsm-card-grid:hover .bsm-card-cover {
    transform: scale(1.04);
}

/* Listen-Karte */
.bsm-book-card.bsm-card-list {
    flex-direction: row;
}
.bsm-book-card.bsm-card-list .bsm-card-cover-wrap {
    width: 90px;
    flex-shrink: 0;
    position: relative;
    background: var(--bsm-border);
}
.bsm-book-card.bsm-card-list .bsm-card-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.bsm-book-card.bsm-card-list .bsm-card-body {
    padding: 1rem;
}

/* Cover Placeholder */
.bsm-card-cover-placeholder,
.bsm-cover-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    background: var(--bsm-accent-light);
    width: 100%;
    height: 100%;
    min-height: 160px;
}

/* Badges */
.bsm-badge-featured {
    position: absolute;
    top: .6rem;
    left: .6rem;
    background: var(--bsm-accent);
    color: #fff;
    font-size: .7rem;
    font-weight: 700;
    padding: .2em .6em;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: .05em;
    z-index: 2;
}
.bsm-status-badge {
    position: absolute;
    bottom: .6rem;
    right: .6rem;
    font-size: .7rem;
    font-weight: 600;
    padding: .2em .65em;
    border-radius: 999px;
    z-index: 2;
}
.bsm-st-reading  { background: #fef3c7; color: #92400e; }
.bsm-st-done     { background: #d1fae5; color: #065f46; }
.bsm-st-wish     { background: #ede9fe; color: #4c1d95; }
.bsm-st-unread   { background: var(--bsm-border); color: var(--bsm-muted); }

/* Card Body */
.bsm-card-body {
    padding: .9rem;
    display: flex;
    flex-direction: column;
    gap: .4rem;
    flex: 1;
}
.bsm-card-title {
    font-size: .95rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.3;
}
.bsm-card-title a {
    color: var(--bsm-text);
    text-decoration: none;
    transition: color var(--bsm-transition);
}
.bsm-card-title a:hover {
    color: var(--bsm-accent);
}
.bsm-card-author {
    font-size: .82rem;
    color: var(--bsm-muted);
    margin: 0;
}
.bsm-card-excerpt {
    font-size: .85rem;
    color: var(--bsm-muted);
    margin: 0;
    line-height: 1.5;
}
.bsm-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
}
.bsm-meta-tag {
    font-size: .75rem;
    color: var(--bsm-muted);
    background: var(--bsm-accent-light);
    padding: .1em .5em;
    border-radius: 999px;
}
.bsm-card-terms {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem;
    margin-top: auto;
}
.bsm-term-chip {
    font-size: .72rem;
    padding: .2em .6em;
    border-radius: 999px;
    background: var(--bsm-accent-light);
    color: var(--bsm-accent);
    text-decoration: none;
    font-weight: 600;
    transition: background var(--bsm-transition);
}
.bsm-term-chip:hover {
    background: var(--bsm-accent);
    color: #fff;
}
.bsm-genre-chip {
    background: color-mix(in srgb, #8b5cf6 12%, transparent);
    color: #6d28d9;
}
.bsm-genre-chip:hover { background: #8b5cf6; color:#fff; }

/* Stars */
.bsm-card-stars,
.bsm-single-stars {
    display: flex;
    gap: .1rem;
}
.bsm-star { color: var(--bsm-border); font-size: 1rem; }
.bsm-star.filled { color: #f59e0b; }

/* Buttons */
.bsm-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
    margin-top: auto;
    padding-top: .5rem;
}
.bsm-btn {
    display: inline-flex;
    align-items: center;
    gap: .3em;
    padding: .45em .9em;
    border-radius: calc(var(--bsm-radius) - 4px);
    font-size: .8rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--bsm-transition);
    line-height: 1.4;
}
.bsm-btn-primary {
    background: var(--bsm-accent);
    color: #fff;
}
.bsm-btn-primary:hover {
    background: var(--bsm-accent-hover);
    color: #fff;
}
.bsm-btn-outline {
    background: transparent;
    color: var(--bsm-accent);
    border: 1.5px solid var(--bsm-accent);
}
.bsm-btn-outline:hover {
    background: var(--bsm-accent);
    color: #fff;
}
.bsm-btn-pdf {
    background: #f0fdf4;
    color: #166534;
    border: 1.5px solid #bbf7d0;
}
.bsm-btn-pdf:hover { background: #166534; color:#fff; border-color:#166534; }
.bsm-btn-block { display: flex; width: 100%; justify-content: center; }

/* ── Paginierung ─────────────────────────────────────────── */
.bsm-pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .35rem;
    margin-top: 2rem;
}
.bsm-page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: calc(var(--bsm-radius) - 4px);
    border: 1px solid var(--bsm-border);
    background: var(--bsm-bg);
    color: var(--bsm-text);
    text-decoration: none;
    font-size: .875rem;
    font-weight: 600;
    transition: all var(--bsm-transition);
}
.bsm-page-btn:hover,
.bsm-page-btn.active {
    background: var(--bsm-accent);
    border-color: var(--bsm-accent);
    color: #fff;
}

/* ── Keine Ergebnisse ────────────────────────────────────── */
.bsm-no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1rem;
    color: var(--bsm-muted);
}
.bsm-no-icon { font-size: 3rem; display: block; margin-bottom: .5rem; }

/* ── Einzelbuch ──────────────────────────────────────────── */
.bsm-single-book {
    max-width: 960px;
    margin: 0 auto;
}
.bsm-single-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
}
.bsm-single-cover {
    display: flex;
    flex-direction: column;
    gap: .75rem;
}
.bsm-cover-img {
    width: 100%;
    border-radius: var(--bsm-radius);
    box-shadow: var(--bsm-shadow-lg);
}
.bsm-single-title {
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 800;
    margin: 0 0 .4rem;
    line-height: 1.2;
}
.bsm-single-author {
    font-size: 1rem;
    color: var(--bsm-muted);
    margin: 0 0 .75rem;
}
.bsm-single-terms {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    margin-bottom: 1rem;
}
.bsm-details-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .9rem;
    margin-bottom: 1.5rem;
}
.bsm-details-table th,
.bsm-details-table td {
    padding: .5rem .75rem;
    border-bottom: 1px solid var(--bsm-border);
    text-align: left;
}
.bsm-details-table th {
    width: 130px;
    color: var(--bsm-muted);
    font-weight: 600;
}
.bsm-single-description {
    line-height: 1.7;
    margin-bottom: 1.5rem;
}
.bsm-opinion-box {
    background: var(--bsm-card-bg);
    border-left: 4px solid var(--bsm-accent);
    border-radius: 0 var(--bsm-radius) var(--bsm-radius) 0;
    padding: 1rem 1.25rem;
    margin-top: 1.5rem;
}
.bsm-opinion-box h4 { margin: 0 0 .5rem; font-size: .9rem; color: var(--bsm-muted); }
.bsm-opinion-box blockquote { margin: 0; font-style: italic; line-height: 1.65; }
.bsm-single-stars {
    justify-content: center;
    font-size: 1.4rem;
}
.bsm-rating-num {
    font-size: .85rem;
    color: var(--bsm-muted);
    margin-left: .4rem;
}

/* ── PDF-Abschnitt ───────────────────────────────────────── */
.bsm-pdf-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--bsm-border);
}
.bsm-pdf-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

/* ── PDF-Reader ──────────────────────────────────────────── */
.bsm-pdf-reader {
    border: 1px solid var(--bsm-border);
    border-radius: var(--bsm-radius);
    overflow: hidden;
    background: #1a1a2e;
    color: #fff;
}
.bsm-pdf-toolbar {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
    padding: .6rem .9rem;
    background: #16213e;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.bsm-pdf-nav,
.bsm-pdf-zoom,
.bsm-pdf-actions {
    display: flex;
    align-items: center;
    gap: .35rem;
}
.bsm-pdf-actions { margin-left: auto; }
.bsm-pdf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,.2);
    background: rgba(255,255,255,.07);
    color: #e2e8f0;
    cursor: pointer;
    font-size: .95rem;
    text-decoration: none;
    transition: all var(--bsm-transition);
}
.bsm-pdf-btn:hover:not(:disabled) {
    background: var(--bsm-accent);
    border-color: var(--bsm-accent);
    color: #fff;
}
.bsm-pdf-btn:disabled { opacity: .35; cursor: default; }
.bsm-pdf-page-info {
    display: flex;
    align-items: center;
    gap: .3rem;
    font-size: .82rem;
    color: #94a3b8;
}
.bsm-pdf-page-input {
    width: 44px;
    padding: .25rem .35rem;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 5px;
    background: rgba(255,255,255,.1);
    color: #fff;
    text-align: center;
    font-size: .82rem;
}
.bsm-pdf-page-input::-webkit-outer-spin-button,
.bsm-pdf-page-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.bsm-pdf-zoom span {
    font-size: .8rem;
    min-width: 3.5ch;
    text-align: center;
    color: #94a3b8;
}
.bsm-pdf-canvas-wrap {
    overflow: auto;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background: #0f0f23;
    padding: 1rem;
}
.bsm-pdf-canvas {
    display: block;
    max-width: 100%;
    box-shadow: 0 4px 32px rgba(0,0,0,.5);
}
.bsm-pdf-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: #94a3b8;
}
.bsm-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255,255,255,.15);
    border-top-color: var(--bsm-accent);
    border-radius: 50%;
    animation: bsm-spin .7s linear infinite;
    margin-bottom: .75rem;
}
@keyframes bsm-spin { to { transform: rotate(360deg); } }

/* ── Kategorien-Cloud ────────────────────────────────────── */
.bsm-categories {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}
.bsm-cat-item {
    display: inline-flex;
    align-items: center;
    gap: .4em;
    padding: .4em 1em;
    border-radius: 999px;
    background: var(--bsm-card-bg);
    border: 1px solid var(--bsm-border);
    color: var(--bsm-text);
    text-decoration: none;
    font-size: .875rem;
    transition: all var(--bsm-transition);
}
.bsm-cat-item:hover {
    background: var(--bsm-accent);
    border-color: var(--bsm-accent);
    color: #fff;
}
.bsm-cat-count {
    font-size: .72rem;
    background: var(--bsm-accent-light);
    color: var(--bsm-accent);
    border-radius: 999px;
    padding: .1em .5em;
}
.bsm-cat-item:hover .bsm-cat-count {
    background: rgba(255,255,255,.2);
    color: #fff;
}
.bsm-cat-style-list .bsm-cat-item {
    width: 100%;
    border-radius: var(--bsm-radius);
    justify-content: space-between;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
    .bsm-books-grid.bsm-view-grid[data-cols="4"] { grid-template-columns: repeat(3,1fr); }
    .bsm-single-layout { grid-template-columns: 180px 1fr; gap: 1.5rem; }
}
@media (max-width: 680px) {
    .bsm-books-grid.bsm-view-grid { grid-template-columns: repeat(2,1fr) !important; }
    .bsm-single-layout { grid-template-columns: 1fr; }
    .bsm-single-cover { flex-direction: row; flex-wrap: wrap; align-items: flex-start; }
    .bsm-cover-img { width: 120px; }
    .bsm-toolbar { flex-direction: column; align-items: stretch; }
    .bsm-view-toggle { align-self: flex-end; }
    .bsm-filters { flex-direction: column; }
}
@media (max-width: 440px) {
    .bsm-books-grid.bsm-view-grid { grid-template-columns: 1fr !important; }
}

/* ── Fehler ──────────────────────────────────────────────── */
.bsm-error {
    padding: 1rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--bsm-radius);
    color: #991b1b;
    font-size: .9rem;
}