/* ══════════════════════════════════════════════════════
   Osobní knihovna – main stylesheet
   ══════════════════════════════════════════════════════ */

/* ── Reset / Base ───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --color-bg:        #0f1117;
    --color-surface:   #1a1d27;
    --color-surface2:  #242736;
    --color-border:    #2e3144;
    --color-primary:   #6c63ff;
    --color-primary-h: #7d75ff;
    --color-danger:    #e05050;
    --color-success:   #45c07a;
    --color-warning:   #f0a030;
    --color-text:      #e2e4ef;
    --color-muted:     #8890aa;
    --color-badge-ebook:  #4a90d9;
    --color-badge-audio:  #e88c2a;
    --radius:          8px;
    --radius-sm:       4px;
    --shadow:          0 2px 12px rgba(0,0,0,.4);
    --transition:      .18s ease;
    --font:            'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.6;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-h); }

img { max-width: 100%; display: block; }

/* ── Navbar ─────────────────────────────────────────── */
.navbar {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: .75rem 1.5rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    white-space: nowrap;
}

.navbar-links {
    display: flex;
    gap: 1rem;
    flex: 1;
}

.navbar-links a {
    color: var(--color-muted);
    font-weight: 500;
    padding: .25rem .5rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.navbar-links a:hover,
.navbar-links a.active {
    color: var(--color-text);
    background: var(--color-surface2);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-left: auto;
    font-size: .9rem;
    color: var(--color-muted);
    white-space: nowrap;
}

/* ── Layout ─────────────────────────────────────────── */
.main-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 3rem;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
}

/* ── Buttons ────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .5rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), opacity var(--transition);
    text-decoration: none;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary  { background: var(--color-primary);  color: #fff; }
.btn-primary:hover { background: var(--color-primary-h); color: #fff; }

.btn-outline  {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-outline:hover { background: var(--color-surface2); color: var(--color-text); }

.btn-danger   { background: var(--color-danger); color: #fff; }
.btn-danger:hover { opacity: .85; }

.btn-sm { padding: .3rem .6rem; font-size: .8rem; }
.btn-full { width: 100%; justify-content: center; }

/* ── Forms ──────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: .35rem; font-size: .88rem; color: var(--color-muted); }

.form-control {
    width: 100%;
    padding: .5rem .75rem;
    background: var(--color-surface2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    font-size: .95rem;
    transition: border-color var(--transition);
    -webkit-appearance: none;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
}

textarea.form-control { resize: vertical; }

.form-select-sm {
    padding: .3rem .5rem;
    font-size: .85rem;
    width: auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

@media (max-width: 640px) {
    .form-grid, .form-row { grid-template-columns: 1fr; }
}

.form-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 1rem;
}

.form-actions {
    display: flex;
    gap: .75rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

/* ── Alerts ─────────────────────────────────────────── */
.alert {
    padding: .75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: .92rem;
}

.alert-error   { background: rgba(224,80,80,.15);  border: 1px solid var(--color-danger);  color: #ff8080; }
.alert-success { background: rgba(69,192,122,.12); border: 1px solid var(--color-success); color: #6de8a4; }

/* ── Auth ───────────────────────────────────────────── */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
    padding: 1rem;
}

.auth-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.auth-logo {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.auth-logo h1 { font-size: 1.4rem; margin-top: .5rem; color: var(--color-text); }

/* ── Search bar ─────────────────────────────────────── */
.search-bar {
    display: flex;
    gap: .75rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    align-items: center;
}

.search-input-wrap {
    position: relative;
    flex: 1;
    min-width: 200px;
}

.search-icon {
    position: absolute;
    left: .6rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-muted);
    pointer-events: none;
}

.search-input { padding-left: 2.2rem !important; }

/* ── Filters bar ────────────────────────────────────── */
.filters-bar {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding: .75rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.filters-group { display: flex; align-items: center; gap: .5rem; }
.filters-group label { font-size: .82rem; color: var(--color-muted); white-space: nowrap; }
.ml-auto { margin-left: auto; }

.filter-pills { display: flex; gap: .35rem; }

.pill {
    padding: .25rem .6rem;
    border-radius: 999px;
    font-size: .8rem;
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    transition: all var(--transition);
    white-space: nowrap;
}
.pill:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pill.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ── Results info ───────────────────────────────────── */
.results-info {
    font-size: .88rem;
    color: var(--color-muted);
    margin-bottom: .75rem;
}

/* ── Books grid ─────────────────────────────────────── */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.book-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition);
    color: var(--color-text);
}

.book-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    color: var(--color-text);
}

.book-cover-wrap {
    position: relative;
    aspect-ratio: 2 / 3;
    background: var(--color-surface2);
    overflow: hidden;
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-cover-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-border);
}

.book-type-badge {
    position: absolute;
    top: .4rem;
    right: .4rem;
    padding: .15rem .4rem;
    border-radius: var(--radius-sm);
    font-size: .7rem;
}
.badge-ebook { background: var(--color-badge-ebook); color: #fff; }
.badge-audio { background: var(--color-badge-audio); color: #fff; }

.book-info {
    padding: .6rem .75rem .75rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: .2rem;
}

.book-title { font-weight: 600; font-size: .88rem; line-height: 1.35; }
.book-author { font-size: .78rem; color: var(--color-muted); }
.book-year   { font-size: .75rem; color: var(--color-muted); }
.book-rating { font-size: .8rem; color: var(--color-warning); letter-spacing: -.05em; }

.book-tags { display: flex; flex-wrap: wrap; gap: .25rem; margin-top: .25rem; }

/* ── Tags ───────────────────────────────────────────── */
.tag {
    display: inline-block;
    padding: .15rem .45rem;
    background: var(--color-surface2);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: .72rem;
    color: var(--color-muted);
    white-space: nowrap;
}

/* ── Pagination ─────────────────────────────────────── */
.pagination {
    display: flex;
    gap: .4rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.page-link {
    padding: .4rem .7rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: .88rem;
    color: var(--color-muted);
    transition: all var(--transition);
}

.page-link:hover { border-color: var(--color-primary); color: var(--color-primary); }
.page-link.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ── Empty state ────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--color-muted);
}

.empty-state h3 { margin: 1rem 0 .5rem; color: var(--color-text); }
.empty-state p  { margin-bottom: 1rem; }

/* ── Book detail ────────────────────────────────────── */
.detail-container { max-width: 960px; margin: 0 auto; }

.detail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: .5rem;
}

.detail-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

.detail-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 640px) {
    .detail-layout { grid-template-columns: 1fr; }
}

.detail-cover { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.detail-cover-placeholder {
    aspect-ratio: 2/3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface2);
    border-radius: var(--radius);
    color: var(--color-border);
}

.download-section { margin-top: 1rem; }
.download-section h3 { font-size: .9rem; margin-bottom: .5rem; color: var(--color-muted); }
.download-btn { flex-direction: column; gap: .1rem; padding: .6rem; text-align: center; }
.download-btn small { font-weight: 400; font-size: .75rem; opacity: .7; }
.download-btn + .download-btn { margin-top: .5rem; }

.detail-type-badge {
    display: inline-block;
    padding: .2rem .6rem;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 600;
    margin-bottom: .5rem;
}

.detail-title  { font-size: 1.7rem; font-weight: 700; line-height: 1.25; margin-bottom: .35rem; }
.detail-author { font-size: 1rem; color: var(--color-muted); margin-bottom: .75rem; }

.detail-rating { display: flex; align-items: center; gap: .5rem; margin-bottom: 1rem; }
.detail-rating .stars { color: var(--color-warning); font-size: 1.1rem; letter-spacing: .05em; }
.detail-rating .rating-num { color: var(--color-muted); font-size: .88rem; }

.meta-table { width: 100%; border-collapse: collapse; margin-bottom: 1rem; }
.meta-table th, .meta-table td { padding: .4rem 0; vertical-align: top; }
.meta-table th { width: 130px; color: var(--color-muted); font-weight: 500; font-size: .88rem; }
.meta-table td { font-size: .92rem; }

.detail-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: 1rem; }

.detail-description h3,
.detail-notes h3 { font-size: .95rem; color: var(--color-muted); margin-bottom: .35rem; }

.detail-description p,
.detail-notes p { font-size: .92rem; line-height: 1.7; }

.detail-notes {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--color-surface2);
    border-radius: var(--radius);
    border-left: 3px solid var(--color-primary);
}

/* ── Upload page ────────────────────────────────────── */
.upload-layout { max-width: 820px; margin: 0 auto; }

.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 2.5rem;
    text-align: center;
    transition: border-color var(--transition), background var(--transition);
    cursor: pointer;
    margin-bottom: 1rem;
}

.upload-zone.drag-over {
    border-color: var(--color-primary);
    background: rgba(108,99,255,.06);
}

.drop-icon { margin-bottom: .75rem; color: var(--color-muted); }
.drop-hint { font-size: .82rem; color: var(--color-muted); margin-top: .4rem; }
.link-btn  { color: var(--color-primary); cursor: pointer; font-weight: 600; }

.file-input-label {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    margin-top: .75rem;
    padding: .5rem 1.25rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    font-size: .9rem;
}
.file-input-label:hover { background: var(--color-primary-h); }
.file-input-label input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.file-info {
    margin-top: .75rem;
    padding: .5rem .75rem;
    background: var(--color-surface2);
    border-radius: var(--radius-sm);
    font-size: .88rem;
    color: var(--color-success);
}

.progress-wrap {
    margin-bottom: 1rem;
}

.progress-bar {
    height: 6px;
    background: var(--color-surface2);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 999px;
    transition: width .2s ease;
}

.progress-text {
    font-size: .8rem;
    color: var(--color-muted);
    margin-top: .25rem;
    text-align: center;
}

.metadata-section {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.metadata-section h3 { margin-bottom: .75rem; font-size: .95rem; }

.meta-search-bar {
    display: flex;
    gap: .5rem;
    align-items: center;
    flex-wrap: wrap;
}

.meta-search-bar input { flex: 1; min-width: 160px; }

.checkbox-label { display: flex; align-items: center; gap: .3rem; font-size: .88rem; white-space: nowrap; }

.meta-results {
    margin-top: 1rem;
    max-height: 320px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.meta-result-item {
    display: flex;
    gap: .75rem;
    padding: .6rem;
    background: var(--color-surface2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color var(--transition);
    align-items: flex-start;
}

.meta-result-item:hover { border-color: var(--color-primary); }

.meta-thumb {
    width: 36px;
    height: 54px;
    object-fit: cover;
    border-radius: 3px;
    flex-shrink: 0;
    background: var(--color-border);
}

.meta-thumb-placeholder {
    width: 36px;
    height: 54px;
    background: var(--color-border);
    border-radius: 3px;
    flex-shrink: 0;
}

.meta-info { flex: 1; min-width: 0; }
.meta-info strong { font-size: .88rem; display: block; }
.meta-info small  { color: var(--color-muted); font-size: .78rem; }

.meta-source {
    font-size: .72rem;
    padding: .1rem .35rem;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    white-space: nowrap;
}

.cover-preview { display: flex; align-items: center; gap: .75rem; margin-bottom: .5rem; }

/* ── Admin ──────────────────────────────────────────── */
.admin-layout { display: grid; grid-template-columns: 1fr 360px; gap: 2rem; align-items: start; }

@media (max-width: 768px) { .admin-layout { grid-template-columns: 1fr; } }

.users-table-wrap h3 { margin-bottom: .75rem; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .88rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.data-table th, .data-table td {
    padding: .6rem .75rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th { font-weight: 600; color: var(--color-muted); background: var(--color-surface2); }
.data-table tr:last-child td { border-bottom: none; }

.table-actions { display: flex; gap: .35rem; flex-wrap: wrap; }

.badge {
    padding: .1rem .45rem;
    border-radius: 999px;
    font-size: .75rem;
    background: var(--color-surface2);
    border: 1px solid var(--color-border);
}
.badge-admin { background: rgba(108,99,255,.2); border-color: var(--color-primary); color: var(--color-primary); }

/* ── Spinner ────────────────────────────────────────── */
.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .7s linear infinite;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

.meta-searching {
    color: var(--color-muted);
    font-size: .88rem;
    padding: .5rem;
    text-align: center;
}

/* ── Utilities ──────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Responsive tweaks ──────────────────────────────── */
@media (max-width: 768px) {
    .navbar { flex-wrap: wrap; gap: .5rem; }
    .navbar-links { flex: 0 0 100%; order: 3; }
    .books-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
    .filters-bar { flex-direction: column; align-items: flex-start; }
    .ml-auto { margin-left: 0; }
}

@media (max-width: 480px) {
    .books-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Scrollbar ──────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-surface); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 999px; }