/* Library – books & audiobooks */
:root {
    --bg: #f5f0e8;
    --bg-card: #fffef9;
    --ink: #1a1814;
    --ink-muted: #5c5549;
    --accent: #2c5282;
    --accent-hover: #1a365d;
    --border: #e0d9ce;
    --radius: 8px;
    --font-sans: 'DM Sans', system-ui, sans-serif;
    --font-serif: 'Crimson Pro', Georgia, serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.5;
    color: var(--ink);
    background: var(--bg);
    min-height: 100vh;
}

.site-header {
    padding: 2rem 1.5rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.site-title {
    margin: 0;
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 600;
}

.site-tagline {
    margin: 0.5rem 0 0;
    font-size: 0.95rem;
    color: var(--ink-muted);
}

.main {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
}

.tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.tab {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--ink-muted);
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}

.tab:hover {
    color: var(--ink);
    background: var(--border);
}

.tab.active {
    color: var(--accent);
    background: rgba(44, 82, 130, 0.1);
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.sort-label {
    font-size: 0.875rem;
    color: var(--ink-muted);
}

.sort-btn {
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.875rem;
    color: var(--ink-muted);
    transition: background 0.15s, color 0.15s;
}

.sort-btn:hover {
    color: var(--ink);
    background: var(--border);
}

.sort-btn.active {
    color: var(--accent);
    font-weight: 500;
    background: rgba(44, 82, 130, 0.12);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.card-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.card-title {
    font-weight: 500;
    font-size: 1rem;
    line-height: 1.3;
    margin-bottom: 0.25rem;
    word-break: break-word;
}

.card-meta {
    font-size: 0.8rem;
    color: var(--ink-muted);
}

.empty {
    grid-column: 1 / -1;
    padding: 2rem;
    text-align: center;
    color: var(--ink-muted);
}

.empty code {
    background: var(--border);
    padding: 0.2em 0.5em;
    border-radius: 4px;
    font-size: 0.9em;
}

.site-footer {
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

.site-footer a {
    color: var(--accent);
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}

/* Reader (PDF) page */
.reader-page {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.reader-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.back-link, .download-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
}

.back-link:hover, .download-link:hover {
    text-decoration: underline;
}

.reader-title {
    margin: 0;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    flex: 1;
    min-width: 0;
    text-align: center;
}

.reader-wrap {
    flex: 1;
    min-height: 0;
    padding: 0.5rem;
    background: #525659;
    overflow: auto;
    position: relative;
}

.pdf-frame {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 4px;
    background: #fff;
}

.pdf-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 1.1rem;
}

.pdf-error {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    padding: 1.5rem;
}
.pdf-error a { color: #a5d6ff; }

.pdf-toolbar {
    position: sticky;
    top: 0;
    z-index: 10;
    flex-shrink: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.75rem 1.25rem;
    padding: 0.5rem 0.75rem;
    background: #3d4245;
    border-radius: 4px 4px 0 0;
}
.pdf-toolbar-group {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.pdf-toolbar-group .pdf-toolbar-group { gap: 0.5rem; }
.pdf-toolbar button {
    font-family: var(--font-sans);
    padding: 0.4rem 0.75rem;
    border-radius: 4px;
    border: 1px solid #5c6368;
    background: #525659;
    color: #fff;
    cursor: pointer;
}
.pdf-toolbar button:hover:not(:disabled) { background: #5c6368; }
.pdf-toolbar button:disabled { opacity: 0.5; cursor: not-allowed; }
.pdf-toolbar button#pdf-zoom-in,
.pdf-toolbar button#pdf-zoom-out { padding: 0.35rem 0.6rem; font-size: 1.1rem; line-height: 1; }
#pdf-page-info,
#pdf-zoom-info { color: #ccc; font-size: 0.9rem; min-width: 2.5em; text-align: center; }
.pdf-toolbar-search input {
    padding: 0.35rem 0.6rem;
    border: 1px solid #5c6368;
    border-radius: 4px;
    background: #525659;
    color: #fff;
    font-size: 0.9rem;
    width: 140px;
}
.pdf-toolbar-search input::placeholder { color: #9ca3af; }
.pdf-toolbar-search input:focus { outline: none; border-color: #7c8ba3; }
.pdf-toolbar-search button { padding: 0.35rem 0.5rem; font-size: 0.95rem; }

.pdf-pages {
    background: #525659;
    padding: 0.5rem;
    overflow: auto;
    min-height: 200px;
}
.pdf-page {
    position: relative;
    margin: 0 auto 0.5rem;
    background: #fff;
    border-radius: 2px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.pdf-page canvas { display: block; vertical-align: top; }
.pdf-text-layer {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
    line-height: 1;
}
.pdf-text-layer span {
    position: absolute;
    white-space: pre;
    color: transparent;
    pointer-events: none;
    transform-origin: 0 0;
}
.pdf-text-layer span.pdf-search-highlight {
    background: rgba(255, 255, 0, 0.4);
    border-radius: 1px;
    pointer-events: none;
}
.pdf-page-placeholder:empty { background: #4a4f52; }
.pdf-page-placeholder:not(:empty) { min-height: 0; }

/* Player (audiobook) page */
.player-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.player-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

.player-title {
    margin: 0.5rem 0 0;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
}

.player-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.player-card {
    max-width: 420px;
    width: 100%;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}

.player-art {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.audio-player {
    width: 100%;
    height: 48px;
    margin-bottom: 1rem;
}

.player-hint {
    margin: 0;
    font-size: 0.8rem;
    color: var(--ink-muted);
}