/* ============================================
   EPUB Inventory — Cinematic Dark Theme
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── Design Tokens ────────────────────────────────────── */

:root {
  /* Backgrounds */
  --bg:             #08111F;
  --bg-secondary:   #0E1B2E;
  --surface:        rgba(20,35,60,0.72);
  --surface-solid:  #15263F;

  /* Primary — electric blue */
  --accent:         #2EA8FF;
  --accent-hover:   #5BC2FF;
  --accent-dark:    #0D6EFD;
  --accent-light:   rgba(46,168,255,0.08);
  --accent-glow:    rgba(46,168,255,0.28);

  /* Amber accent */
  --amber:          #F4A940;
  --amber-soft:     #FFD089;

  /* Status */
  --success:        #3EDB8D;
  --warning:        #FFB84D;
  --danger:         #FF5E73;

  /* Text */
  --text:           #F3F7FC;
  --text-secondary: #A8BDD6;
  --text-muted:     #7087A4;

  /* Borders & glow */
  --border:         rgba(86,160,255,0.18);
  --border-light:   rgba(86,160,255,0.08);
  --glow:           0 0 24px rgba(46,168,255,0.28);

  /* Shadows */
  --shadow-xs:      0 1px 2px rgba(0,0,0,0.3);
  --shadow:         0 2px 8px rgba(0,0,0,0.35);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:      0 12px 35px rgba(0,0,0,0.5);

  /* Radii */
  --radius:         18px;
  --radius-sm:      12px;
  --radius-xs:      10px;
  --transition:     180ms ease;
}

/* ── Reset ───────────────────────────────────────────── */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Inter, "Segoe UI", sans-serif;
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background:
        radial-gradient(circle at top left, #163B74 0%, transparent 35%),
        radial-gradient(circle at bottom right, #7A4713 0%, transparent 30%),
        linear-gradient(180deg, #08111F, #0A1424);
    background-attachment: fixed;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

/* ── Nav ─────────────────────────────────────────────── */

nav {
    height: 72px;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0 1.75rem;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(8,17,31,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

.menu-toggle {
    display: none;
}

.nav-drawer {
    display: contents;
}

.nav-backdrop {
    display: none;
}

.logo-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    object-fit: cover;
    object-position: center;
    border: 1px solid var(--border);
    box-shadow: var(--glow);
}

.nav-links {
    display: flex;
    gap: 0.25rem;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.45rem 0.8rem;
    border-radius: var(--radius-xs);
    transition: all var(--transition);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--text);
    background: var(--accent-light);
}

.search-bar {
    margin-left: auto;
}

.search-bar input {
    padding: 0.55rem 1.1rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 9999px;
    width: 260px;
    font-size: 0.875rem;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(46,168,255,0.18);
    background: rgba(255,255,255,0.06);
    width: 320px;
}

.nav-auth {
    margin-left: 0.25rem;
    padding: 0.4rem 0.9rem;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-xs);
    font-size: 0.85rem;
    border: 1px solid rgba(255,255,255,0.08);
}

/* ── Main ────────────────────────────────────────────── */

main {
    max-width: 1060px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
    color: var(--text);
}

h2 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 1.75rem 0 0.75rem;
    color: var(--text);
}

/* ── Glass card base ─────────────────────────────────── */

.glass {
    background: var(--surface);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.05),
        0 12px 35px rgba(0,0,0,0.35);
}

/* ── Stats Grid ──────────────────────────────────────── */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.05),
        0 8px 28px rgba(0,0,0,0.3);
    transition: all var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    border-color: rgba(91,194,255,0.4);
    box-shadow: var(--glow), 0 12px 35px rgba(0,0,0,0.35);
}

.stat-card-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--amber);
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* ── Language List ───────────────────────────────────── */

.lang-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 0.75rem;
}

.lang-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.9rem 1.1rem;
    background: linear-gradient(
        180deg,
        rgba(31,142,255,0.08),
        rgba(21,38,63,0.75)
    );
    backdrop-filter: blur(12px);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text);
    border: 1px solid rgba(46,168,255,0.14);
    transition: all var(--transition);
}

.lang-item:hover {
    transform: translateY(-3px);
    border-color: rgba(91,194,255,0.4);
    box-shadow: var(--glow);
}

.lang-count {
    color: var(--amber);
    font-size: 0.875rem;
    font-weight: 700;
}

/* ── Browse List ─────────────────────────────────────── */

.browse-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.browse-item {
    display: flex;
    align-items: center;
    padding: 0.6rem 0.85rem;
    background: var(--surface);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-xs);
    border: 1px solid transparent;
    transition: all var(--transition);
}

.browse-item:hover {
    background: rgba(46,168,255,0.08);
    border-color: rgba(46,168,255,0.25);
}

.browse-link {
    flex: 1;
    display: flex;
    justify-content: space-between;
    text-decoration: none;
    color: var(--text);
    min-width: 0;
}

.browse-count {
    color: var(--amber);
    flex-shrink: 0;
    margin-left: 1rem;
    font-size: 0.875rem;
    font-weight: 700;
}

.btn-download-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    margin-left: 0.5rem;
    background: rgba(255,255,255,0.05);
    color: var(--text-secondary);
    border-radius: var(--radius-xs);
    text-decoration: none;
    font-size: 0.9rem;
    flex-shrink: 0;
    transition: all var(--transition);
    border: 1px solid rgba(255,255,255,0.08);
}

.btn-download-sm:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(46,168,255,0.35);
}

/* ── Author Filter ──────────────────────────────────── */

.author-filter {
    margin-bottom: 1.25rem;
}

.filter-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.filter-wrapper::before {
    content: '';
    position: absolute;
    left: 1rem;
    width: 18px;
    height: 18px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237087A4' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E");
    background-size: contain;
    pointer-events: none;
    transition: opacity 0.2s;
}

.author-filter input {
    width: 100%;
    padding: 0.85rem 2.5rem 0.85rem 3rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 9999px;
    font-size: 0.95rem;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.author-filter input::placeholder {
    color: var(--text-muted);
}

.author-filter input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(46,168,255,0.18);
}

.author-filter input:focus ~ .filter-clear,
.filter-clear.visible {
    opacity: 1;
    pointer-events: auto;
}

.filter-clear {
    position: absolute;
    right: 0.75rem;
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(255,255,255,0.06);
    color: var(--text-muted);
    border-radius: 50%;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
}

.filter-clear:hover {
    background: rgba(255,255,255,0.12);
    color: var(--text);
}

.filter-status {
    margin-top: 0.5rem;
    padding-left: 0.25rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    min-height: 1.2em;
}

/* ── Letter Navigation ──────────────────────────────── */

.letter-nav {
    position: sticky;
    top: 72px;
    z-index: 10;
    display: flex;
    flex-wrap: wrap;
    gap: 0.2rem;
    padding: 0.6rem 0;
    background: rgba(8,17,31,0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    margin-bottom: 0.75rem;
}

.letter-link {
    display: inline-block;
    min-width: 1.7rem;
    padding: 0.25rem 0.4rem;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
    border-radius: var(--radius-xs);
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.06);
    transition: all var(--transition);
}

.letter-link:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    box-shadow: 0 2px 12px rgba(46,168,255,0.35);
}

.letter-section {
    scroll-margin-top: 8rem;
}

.letter-header {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    padding: 0.5rem 0.85rem;
    margin: 0.85rem 0 0.35rem;
    background: rgba(46,168,255,0.08);
    border-radius: var(--radius-xs);
}

/* ── Title List ──────────────────────────────────────── */

.title-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.title-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0.85rem;
    background: var(--surface);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-xs);
    text-decoration: none;
    color: var(--text);
    border: 1px solid transparent;
    transition: all var(--transition);
}

.title-item:hover {
    background: rgba(46,168,255,0.08);
    border-color: rgba(46,168,255,0.25);
}

.title-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.title-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.title-author {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.title-meta {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-shrink: 0;
    margin-left: 1rem;
}

.title-lang {
    font-size: 0.75rem;
    background: rgba(46,168,255,0.12);
    color: var(--accent);
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    font-weight: 600;
}

.title-size {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.title-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.title-meta-inline {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Filter Bar ──────────────────────────────────────── */

.filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.4rem 0.85rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    text-decoration: none;
    background: rgba(255,255,255,0.04);
    color: var(--text-secondary);
    border: 1px solid rgba(255,255,255,0.08);
    transition: all var(--transition);
    font-weight: 500;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(46,168,255,0.35);
}

/* ── Pagination ──────────────────────────────────────── */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.pagination-btn {
    padding: 0.4rem 1rem;
    border-radius: var(--radius-xs);
    background: var(--surface);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text);
    font-size: 0.85rem;
    transition: all var(--transition);
}

.pagination-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 2px 12px rgba(46,168,255,0.2);
}

.pagination-info {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Duplicate Groups ───────────────────────────────── */

.dup-group {
    background: var(--surface);
    backdrop-filter: blur(18px);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 8px 28px rgba(0,0,0,0.3);
}

.dup-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 0.85rem;
    background: rgba(46,168,255,0.08);
    flex-wrap: wrap;
}

.dup-title {
    font-weight: 600;
    color: var(--text);
}

.dup-author {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.dup-count {
    margin-left: auto;
    font-size: 0.75rem;
    background: var(--amber);
    color: #000;
    padding: 0.15rem 0.6rem;
    border-radius: 9999px;
    font-weight: 700;
}

.dup-copies {
    display: flex;
    flex-direction: column;
}

.dup-copy {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.85rem;
    text-decoration: none;
    color: var(--text);
    border-top: 1px solid rgba(255,255,255,0.05);
    transition: background var(--transition);
}

.dup-copy:hover {
    background: rgba(46,168,255,0.06);
}

.dup-filesize {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 5rem;
    flex-shrink: 0;
}

.dup-filepath {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

/* ── Breadcrumb ──────────────────────────────────────── */

.back-link {
    display: inline-block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.2rem;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-xs);
    transition: all var(--transition);
}

.back-link:hover {
    color: var(--accent);
    background: rgba(46,168,255,0.08);
}

.breadcrumb {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

.breadcrumb a:hover {
    color: var(--accent);
}

/* ── Search Form ─────────────────────────────────────── */

.search-form {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.search-form input {
    flex: 1;
    padding: 0.7rem 1.1rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.search-form input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(46,168,255,0.18);
}

.search-form button {
    padding: 0.7rem 1.75rem;
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition);
    box-shadow: 0 6px 20px rgba(46,168,255,0.35);
    font-family: inherit;
}

.search-form button:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #3DAEFF, #74D4FF);
    box-shadow: 0 8px 25px rgba(46,168,255,0.45);
}

.results-count {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* ── Search Author Groups ───────────────────────────── */

.search-author-group {
    margin-bottom: 1.5rem;
}

.search-author-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0.85rem;
    background: rgba(14,27,46,0.8);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    border-bottom: 2px solid var(--accent);
}

.search-author-info {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}

.search-author-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text);
}

.search-author-count {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.search-author-group .title-list {
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

/* ── Reader (page header) ────────────────────────────── */

.reader-header {
    margin-bottom: 0.6rem;
}

.reader-header-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.reader-header-title {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    min-width: 0;
    flex: 1;
}

.reader-header-title h1 {
    margin-bottom: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reader-author {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
}

.reader-meta {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.reader-layout {
    display: flex;
    gap: 1.5rem;
    min-height: 60vh;
}

.reader-toc {
    width: 220px;
    flex-shrink: 0;
    background: var(--surface);
    backdrop-filter: blur(18px);
    border-radius: var(--radius-sm);
    padding: 1rem;
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 8px 28px rgba(0,0,0,0.3);
    max-height: 75vh;
    overflow-y: auto;
}

.reader-toc h3 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.reader-toc ul {
    list-style: none;
}

.reader-toc li {
    margin-bottom: 0.25rem;
}

.reader-toc a {
    display: block;
    padding: 0.35rem 0.6rem;
    border-radius: var(--radius-xs);
    text-decoration: none;
    color: var(--text);
    font-size: 0.85rem;
    line-height: 1.3;
    transition: all var(--transition);
}

.reader-toc a:hover {
    background: rgba(46,168,255,0.08);
    color: var(--accent);
}

.reader-toc li.active a {
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    font-weight: 500;
}

.reader-content {
    flex: 1;
    min-width: 0;
}

.chapter-content {
    background: var(--surface);
    backdrop-filter: blur(18px);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 12px 35px rgba(0,0,0,0.35);
    line-height: 1.8;
    font-size: 1rem;
}

.chapter-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-xs);
}

.chapter-content h1, .chapter-content h2, .chapter-content h3 {
    margin: 1.5rem 0 0.75rem;
    color: var(--text);
}

.chapter-content p {
    margin-bottom: 1rem;
}

.reader-empty {
    color: var(--text-muted);
    font-style: italic;
}

.chapter-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding: 0.75rem 0;
}

.btn-nav {
    padding: 0.5rem 1.1rem;
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border-radius: var(--radius-xs);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(46,168,255,0.3);
}

.btn-nav:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #3DAEFF, #74D4FF);
    box-shadow: 0 6px 20px rgba(46,168,255,0.4);
}

.btn-nav.disabled {
    background: rgba(255,255,255,0.06);
    color: var(--text-muted);
    cursor: default;
    pointer-events: none;
    box-shadow: none;
}

.chapter-info {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ── Download Button ─────────────────────────────────── */

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.1rem;
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border-radius: var(--radius-xs);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(46,168,255,0.3);
}

.btn-download:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(46,168,255,0.45);
    color: #fff;
}

.author-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.85rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.author-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* ── Footer ──────────────────────────────────────────── */

footer {
    text-align: center;
    padding: 2rem 1.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 3rem;
}

/* ── Auth Pages ─────────────────────────────────────── */

.auth-container {
    max-width: 400px;
    margin: 4rem auto;
    padding: 2.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    backdrop-filter: blur(18px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 12px 35px rgba(0,0,0,0.35);
}

.auth-container h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.auth-container > p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.auth-form label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text);
}

.auth-form input[type="text"],
.auth-form input[type="password"],
.auth-form select {
    width: 100%;
    padding: 0.65rem 0.85rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xs);
    font-size: 0.95rem;
    box-sizing: border-box;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(46,168,255,0.18);
    background: rgba(255,255,255,0.06);
}

.auth-form button {
    width: 100%;
    padding: 0.7rem;
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border: none;
    border-radius: var(--radius-xs);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 6px 20px rgba(46,168,255,0.35);
    font-family: inherit;
}

.auth-form button:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #3DAEFF, #74D4FF);
}

.auth-error {
    background: rgba(255,94,115,0.1);
    color: var(--danger);
    border: 1px solid rgba(255,94,115,0.2);
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-xs);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.auth-message {
    background: rgba(62,219,141,0.1);
    color: var(--success);
    border: 1px solid rgba(62,219,141,0.2);
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-xs);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* ── Admin Page ─────────────────────────────────────── */

.admin-container {
    max-width: 700px;
    margin: 2rem auto;
}

.admin-container h1 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.admin-container h2 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.5rem;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.admin-table th {
    text-align: left;
    border-bottom: 2px solid var(--border);
    padding: 0.5rem 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.admin-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.role-badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.role-admin {
    background: rgba(46,168,255,0.15);
    color: var(--accent);
}

.role-user {
    background: rgba(62,219,141,0.12);
    color: var(--success);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border: none;
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: all var(--transition);
    padding: 0.3rem 0.7rem;
    font-size: 0.8rem;
    font-weight: 500;
}

.btn-danger:hover {
    background: #ff7a8a;
}

.btn-small {
    padding: 0.25rem 0.65rem;
    font-size: 0.8rem;
}

.admin-add-form .form-row {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.admin-add-form .form-row > div {
    flex: 1;
    min-width: 120px;
}

.admin-add-form label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    font-size: 0.85rem;
}

.admin-add-form input,
.admin-add-form select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xs);
    box-sizing: border-box;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    font-family: inherit;
}

.admin-add-form button {
    padding: 0.5rem 1.1rem;
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border: none;
    border-radius: var(--radius-xs);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition);
    font-family: inherit;
}

.admin-add-form button:hover {
    background: linear-gradient(135deg, #3DAEFF, #74D4FF);
}

/* ── Usage / Activity ───────────────────────────────── */

.usage-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.usage-card {
    background: var(--surface);
    backdrop-filter: blur(18px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 8px 28px rgba(0,0,0,0.3);
}

.usage-card:hover {
    transform: translateY(-2px);
    border-color: rgba(91,194,255,0.4);
    box-shadow: var(--glow);
}

.usage-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--amber);
    letter-spacing: -0.03em;
}

.usage-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.usage-feed td {
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.usage-time {
    white-space: nowrap;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.usage-dim {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.action-badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.action-view {
    background: rgba(46,168,255,0.12);
    color: var(--accent);
}

.action-search {
    background: rgba(62,219,141,0.12);
    color: var(--success);
}

.action-render {
    background: rgba(46,168,255,0.12);
    color: var(--accent);
}

.action-download {
    background: rgba(244,169,64,0.12);
    color: var(--amber);
}

.action-download_author {
    background: rgba(244,169,64,0.12);
    color: var(--amber);
}

/* ── Edit Metadata ──────────────────────────────────── */

.isbn-lookup {
    max-width: 500px;
    margin: 1rem auto 0;
    padding: 1.25rem;
    background: var(--surface);
    backdrop-filter: blur(18px);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.isbn-lookup label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.isbn-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.isbn-row input {
    flex: 1;
    padding: 0.55rem 0.75rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xs);
    font-size: 0.95rem;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.isbn-row input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(46,168,255,0.18);
}

.isbn-row button {
    padding: 0.55rem 1.1rem;
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border: none;
    border-radius: var(--radius-xs);
    font-size: 0.9rem;
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
    font-family: inherit;
}

.isbn-row button:hover {
    background: linear-gradient(135deg, #3DAEFF, #74D4FF);
}

.isbn-row button:disabled {
    background: rgba(255,255,255,0.06);
    color: var(--text-muted);
    cursor: default;
    box-shadow: none;
}

#isbn-status {
    font-size: 0.85rem;
    white-space: nowrap;
}

#isbn-status.loading {
    color: var(--text-muted);
}

#isbn-status.success {
    color: var(--success);
}

#isbn-status.error {
    color: var(--danger);
}

.edit-form {
    max-width: 500px;
    margin: 1rem auto;
}

.form-group {
    margin-bottom: 1.1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text);
}

.form-group input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xs);
    font-size: 0.95rem;
    box-sizing: border-box;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(46,168,255,0.18);
    background: rgba(255,255,255,0.06);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.form-actions button {
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, #1F8EFF, #4EC6FF);
    color: #fff;
    border: none;
    border-radius: var(--radius-xs);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(46,168,255,0.3);
    font-family: inherit;
}

.form-actions button:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #3DAEFF, #74D4FF);
}

.btn-cancel {
    padding: 0.6rem 1.5rem;
    background: rgba(255,255,255,0.05);
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xs);
    font-size: 0.95rem;
    text-decoration: none;
    text-align: center;
    transition: all var(--transition);
}

.btn-cancel:hover {
    background: rgba(255,255,255,0.1);
}

.edit-warning {
    margin-top: 0.5rem;
    color: var(--amber);
    background: rgba(244,169,64,0.1);
    border: 1px solid rgba(244,169,64,0.25);
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-xs);
    font-size: 0.85rem;
}

.btn-edit {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.45rem 1rem;
    background: rgba(255,255,255,0.05);
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xs);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
}

.btn-edit:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text);
}

.reader-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.75rem;
}

/* ── Bulk Edit ───────────────────────────────────────── */

.bulk-info {
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.bulk-preview {
    margin: 1.5rem 0;
}

.bulk-preview h3 {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.bulk-book-list {
    list-style: none;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    background: var(--surface);
}

.bulk-book-list li {
    padding: 0.5rem 0.85rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-size: 0.9rem;
}

.bulk-book-list li:last-child {
    border-bottom: none;
}

.btn-confirm {
    padding: 0.6rem 1.5rem;
    background: var(--success);
    color: #000;
    border: none;
    border-radius: var(--radius-xs);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.btn-confirm:hover {
    filter: brightness(1.1);
    box-shadow: 0 4px 16px rgba(62,219,141,0.35);
}

.bulk-results {
    margin-top: 1rem;
}

.bulk-results-summary {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    font-size: 1rem;
}

.bulk-ok { color: var(--success); }
.bulk-warn { color: var(--amber); }
.bulk-err { color: var(--danger); }

.bulk-section {
    margin-bottom: 1.5rem;
}

.bulk-section h3 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.bulk-list {
    list-style: none;
    max-height: 250px;
    overflow-y: auto;
    border-radius: var(--radius-xs);
    padding: 0.6rem 0.85rem;
    font-size: 0.85rem;
    line-height: 1.6;
}

.bulk-warn-list {
    background: rgba(244,169,64,0.1);
    border: 1px solid rgba(244,169,64,0.25);
}

.bulk-err-list {
    background: rgba(255,94,115,0.1);
    border: 1px solid rgba(255,94,115,0.2);
}

/* ── Documentation ───────────────────────────────────── */

.docs-container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.docs-container h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.docs-container h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.docs-container h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.docs-container p {
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.docs-container code {
    background: rgba(255,255,255,0.06);
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-xs);
    font-size: 0.88em;
}

.docs-toc {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.2rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.docs-toc strong {
    font-weight: 600;
}

.docs-toc a {
    color: var(--accent);
    text-decoration: none;
}

.docs-toc a:hover {
    text-decoration: underline;
}

.docs-note {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(46,168,255,0.08);
    border: 1px solid rgba(46,168,255,0.2);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    line-height: 1.6;
}

.docs-container kbd {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xs);
    font-family: inherit;
    font-size: 0.85rem;
    box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

/* ── Pipeline Logs (/admin/logs) ──────────────────────── */

.logs-layout {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.log-index {
    position: sticky;
    top: 5rem;
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.log-index h2 {
    font-size: 0.95rem;
    margin: 0 0 0.5rem;
}

.log-index-item {
    display: flex;
    gap: 0.6rem;
    align-items: flex-start;
    padding: 0.5rem;
    border-radius: var(--radius-xs);
    color: inherit;
    text-decoration: none;
    transition: background var(--transition);
}

.log-index-item:hover {
    background: rgba(46,168,255,0.08);
}

.log-index-text {
    display: flex;
    flex-direction: column;
    line-height: 1.35;
}

.log-index-text small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.status-dot {
    width: 0.65rem;
    height: 0.65rem;
    border-radius: 50%;
    margin-top: 0.3rem;
    flex: none;
}

.dot-ok      { background: var(--success); }
.dot-warn    { background: var(--amber); }
.dot-error   { background: var(--danger); }
.dot-missing { background: var(--text-muted); }

.logs-meta {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 0.75rem 0 0;
}

.log-section {
    margin-bottom: 2rem;
}

.log-filename {
    font-weight: normal;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.log-tail {
    background: rgba(8,17,31,0.8);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    max-height: 32rem;
    overflow-y: auto;
}

.log-line {
    white-space: pre-wrap;
    word-break: break-word;
    padding: 0.05rem 0.4rem;
    border-radius: 3px;
}

.log-ts {
    color: var(--text-muted);
}

.log-line.log-error {
    color: var(--danger);
    background: rgba(255,94,115,0.08);
}

.log-line.log-warn {
    color: var(--amber);
    background: rgba(244,169,64,0.07);
}

.log-line.log-ok {
    color: var(--success);
}

.logs-missing {
    color: var(--text-muted);
    font-style: italic;
}

/* ── Status Badges ──────────────────────────────────── */

.badge {
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.badge.success {
    background: rgba(62,219,141,0.12);
    color: var(--success);
}

.badge.warning {
    background: rgba(255,184,77,0.12);
    color: var(--warning);
}

.badge.error {
    background: rgba(255,94,115,0.12);
    color: var(--danger);
}

/* ── Tables ─────────────────────────────────────────── */

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
    padding: 14px 18px;
}

td {
    padding: 18px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

tr:hover {
    background: rgba(46,168,255,0.04);
}

/* ── Progress ────────────────────────────────────────── */

.progress {
    height: 8px;
    border-radius: 999px;
    background: rgba(255,255,255,0.06);
    overflow: hidden;
}

.progress .bar {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, #1F8EFF, #59C7FF);
    box-shadow: 0 0 12px rgba(46,168,255,0.55);
}

/* ── Responsive ──────────────────────────────────────── */

@media (max-width: 900px) {
    .logs-layout {
        grid-template-columns: 1fr;
    }

    .log-index {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
    }

    .log-index h2 {
        width: 100%;
    }
}

/* ── Mobile (≤768px) ──────────────────────────────────── */

@media (max-width: 768px) {
    nav {
        padding: 0 0.75rem;
        gap: 0.75rem;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .logo .logo-text {
        display: none;
    }

    .menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 4px;
        width: 40px;
        height: 40px;
        padding: 8px;
        background: none;
        border: none;
        cursor: pointer;
        flex-shrink: 0;
        -webkit-tap-highlight-color: transparent;
    }

    .menu-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
        transition: all 300ms ease;
    }

    .menu-toggle.open span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .menu-toggle.open span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.open span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    .nav-drawer {
        position: fixed;
        top: 72px;
        left: 0;
        bottom: 0;
        width: 280px;
        z-index: 200;
        background: rgba(8,17,31,0.97);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border-right: 1px solid rgba(255,255,255,0.06);
        transform: translateX(-100%);
        transition: transform 300ms ease;
        overflow-y: auto;
        padding: 1rem 0;
        display: block;
    }

    .nav-drawer.open {
        transform: translateX(0);
    }

    .nav-drawer .nav-links {
        flex-direction: column;
        gap: 0;
    }

    .nav-drawer .nav-links a {
        display: block;
        padding: 0.75rem 1.25rem;
        border-radius: 0;
        font-size: 0.95rem;
        border-bottom: 1px solid rgba(255,255,255,0.04);
    }

    .nav-drawer .nav-links a:last-child {
        border-bottom: none;
    }

    .nav-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        top: 72px;
        z-index: 190;
        background: rgba(0,0,0,0.5);
    }

    .nav-drawer.open ~ .nav-backdrop {
        display: block;
    }

    .search-bar {
        flex: 1;
        min-width: 0;
    }

    .search-bar input {
        width: 100%;
    }

    .search-bar input:focus {
        width: 100%;
    }
}