/*
 * SANKALP Library — main.css
 * Palette: warm beige + deep forest green
 * --clr-bg        warm off-white parchment
 * --clr-surface   white cards
 * --clr-border    soft warm grey
 * --clr-ink       dark warm charcoal
 * --clr-muted     medium warm grey
 * --clr-green     deep forest green (primary action)
 * --clr-green-dk  darker green (hover)
 * --clr-green-lt  pale green tint (badges, backgrounds)
 * --clr-amber     warm amber (stars)
 */

/* ── Tokens ───────────────────────────────────────────────────────────── */
:root {
  --clr-bg:        #f5f0e8;
  --clr-surface:   #fffdf8;
  --clr-border:    #e0d9cc;
  --clr-ink:       #1e1e1a;
  --clr-muted:     #7a7060;
  --clr-green:     #2d5a3d;
  --clr-green-dk:  #1e3d2a;
  --clr-green-lt:  #eaf2ec;
  --clr-amber:     #b5860d;
  --clr-danger:    #8b2020;
  --clr-danger-lt: #fdf0f0;

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 3px rgba(30,30,26,.08);
  --shadow:    0 4px 16px rgba(30,30,26,.10);

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ── Reset ────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body.library-body {
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-ink);
  line-height: 1.65;
  font-size: 15px;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── Layout ───────────────────────────────────────────────────────────── */
.library-container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

/* ── Header ───────────────────────────────────────────────────────────── */
.library-header {
  background: var(--clr-green);
  color: #fff;
  padding: .875rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 3px solid var(--clr-green-dk);
}
.library-header__inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.library-header__brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  display: flex;
  align-items: center;
  gap: .5rem;
  white-space: nowrap;
  letter-spacing: .01em;
}
.library-header__brand i { font-size: 1.25rem; }

/* Header search */
.library-header__search { flex: 1; display: flex; min-width: 200px; max-width: 480px; }
.library-search-input {
  flex: 1;
  padding: .5rem 1rem;
  border: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  font-size: .875rem;
  font-family: var(--font-sans);
  background: rgba(255,255,255,.15);
  color: #fff;
  outline: none;
}
.library-search-input::placeholder { color: rgba(255,255,255,.6); }
.library-search-input:focus { background: rgba(255,255,255,.25); }
.library-search-btn {
  padding: .5rem .875rem;
  background: rgba(255,255,255,.2);
  color: #fff;
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  cursor: pointer;
  transition: background .15s;
}
.library-search-btn:hover { background: rgba(255,255,255,.3); }

/* Nav */
.library-nav { display: flex; gap: .25rem; margin-left: auto; }
.library-nav__link {
  color: rgba(255,255,255,.8);
  font-size: .875rem;
  padding: .35rem .75rem;
  border-radius: var(--radius-sm);
  transition: all .15s;
}
.library-nav__link:hover,
.library-nav__link.is-active {
  color: #fff;
  background: rgba(255,255,255,.15);
}

/* ── Main & footer ────────────────────────────────────────────────────── */
.library-main { padding: 2rem 0 5rem; min-height: calc(100vh - 60px); }
.library-footer {
  background: var(--clr-green-dk);
  color: rgba(255,255,255,.55);
  padding: 1.5rem 0;
  font-size: .8rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: .4rem;
}
.library-footer a { color: rgba(255,255,255,.7); }
.library-footer a:hover { color: #fff; }

/* ── Buttons ──────────────────────────────────────────────────────────── */
.library-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: all .15s;
  white-space: nowrap;
}
.library-btn--primary { background: var(--clr-green); color: #fff; border-color: var(--clr-green); }
.library-btn--primary:hover { background: var(--clr-green-dk); border-color: var(--clr-green-dk); }
.library-btn--outline { border-color: var(--clr-green); color: var(--clr-green); background: transparent; }
.library-btn--outline:hover { background: var(--clr-green); color: #fff; }
.library-btn--danger { background: var(--clr-danger); color: #fff; border-color: var(--clr-danger); }
.library-btn--danger:hover { filter: brightness(.9); }
.library-btn--sm { padding: .3rem .75rem; font-size: .8rem; }
.library-btn--lg { padding: .75rem 2rem; font-size: 1rem; }
.library-btn-icon {
  background: none; border: none; cursor: pointer;
  padding: .3rem; border-radius: 4px;
  color: var(--clr-muted); transition: color .15s;
}
.library-btn-icon:hover { color: var(--clr-ink); }
.library-btn-icon--danger:hover { color: var(--clr-danger); }
.library-btn-icon--verified { color: var(--clr-green); }

/* ── Alerts ───────────────────────────────────────────────────────────── */
.library-alert { padding: .75rem 1rem; border-radius: var(--radius-sm); margin-bottom: 1rem; font-size: .875rem; border-left: 3px solid; }
.library-alert--success { background: var(--clr-green-lt); color: var(--clr-green-dk); border-color: var(--clr-green); }
.library-alert--error { background: var(--clr-danger-lt); color: var(--clr-danger); border-color: var(--clr-danger); }

/* ── Breadcrumb ───────────────────────────────────────────────────────── */
.library-breadcrumb { display: flex; gap: .5rem; align-items: center; color: var(--clr-muted); font-size: .825rem; margin-bottom: 1.5rem; }
.library-breadcrumb a { color: var(--clr-green); }
.library-breadcrumb a:hover { text-decoration: underline; }

/* ── Page titles / headers ────────────────────────────────────────────── */
.library-page-title { font-size: 1.7rem; font-weight: 800; letter-spacing: -.02em; }
.library-results-header {
  display: flex; align-items: center;
  justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.library-results-header__title { font-size: 1.3rem; font-weight: 700; }
.library-results-header__title em { font-style: normal; color: var(--clr-green); }

/* Tells the user what search actually did — spelling correction applied, results
   broadened, or matched on ISBN. Parent is a space-between flex row, so claim a
   full basis to break onto its own line rather than squeezing beside the title. */
.library-search-note {
  flex-basis: 100%;
  margin-top: -.25rem;
  font-size: .875rem;
  color: var(--clr-muted);
}
.library-search-note strong { color: var(--clr-ink); font-weight: 600; }

/* ── Typeahead ────────────────────────────────────────────────────────────
   The shell is injected by main.js around the search input purely to give the
   absolutely-positioned dropdown a positioning context. It must not disturb the
   input's own layout, hence display:contents-like sizing via flex:1 in the hero
   form and width:100% elsewhere. */
.library-suggest-shell { position: relative; flex: 1; min-width: 0; }

.library-suggest {
  position: absolute; z-index: 30;
  top: calc(100% + 4px); left: 0; right: 0;
  margin: 0; padding: .25rem;
  list-style: none;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-height: 20rem; overflow-y: auto;
  text-align: left;
}
.library-suggest[hidden] { display: none; }

.library-suggest__item {
  display: flex; align-items: baseline; gap: .6rem;
  padding: .5rem .65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.library-suggest__item.is-active,
.library-suggest__item:hover { background: var(--clr-green-lt); }

.library-suggest__value {
  color: var(--clr-ink); font-size: .9rem;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.library-suggest__hint {
  color: var(--clr-muted); font-size: .78rem;
  margin-left: auto; padding-left: .5rem;
  white-space: nowrap; flex-shrink: 0;
}

/* ── Sections ─────────────────────────────────────────────────────────── */
.library-section { margin-top: 2.5rem; }
.library-section__title {
  font-size: 1rem; font-weight: 700; margin-bottom: 1rem;
  color: var(--clr-ink); display: flex; align-items: center; gap: .75rem;
  padding-bottom: .5rem; border-bottom: 2px solid var(--clr-border);
}

/* ── Hero ─────────────────────────────────────────────────────────────── */
.library-hero { text-align: center; padding: 4rem 1rem 2.5rem; }
.library-hero__title { font-size: 2.75rem; font-weight: 900; letter-spacing: -.03em; line-height: 1.15; margin-bottom: .75rem; }
.library-hero__sub { color: var(--clr-muted); font-size: 1.05rem; margin-bottom: 2.25rem; }
.library-hero__form {
  display: flex; max-width: 580px;
  margin: 0 auto 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.library-hero__input {
  flex: 1; padding: .9rem 1.25rem;
  border: 2px solid var(--clr-border);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  font-size: 1rem; font-family: var(--font-sans);
  background: var(--clr-surface);
  outline: none;
  color: var(--clr-ink);
}
.library-hero__input:focus { border-color: var(--clr-green); }
.library-hero__form .library-btn--primary {
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: .9rem 1.75rem;
  font-size: 1rem;
}
.library-hero__hints {
  display: flex; gap: .75rem; justify-content: center;
  flex-wrap: wrap; color: var(--clr-muted); font-size: .85rem;
}
.library-hero__hints a { color: var(--clr-green); text-decoration: underline; }

/* ── Book list ────────────────────────────────────────────────────────── */
.library-book-list { display: flex; flex-direction: column; gap: .75rem; }

/* ── Book card ────────────────────────────────────────────────────────── */
.library-book-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  display: flex;
  gap: 1.1rem;
  align-items: flex-start;
  transition: box-shadow .15s, border-color .15s;
}
.library-book-card:hover { box-shadow: var(--shadow); border-color: #c8bfb0; }

/* Cover thumbnail in card */
.library-book-card__cover {
  width: 52px; height: 72px;
  flex-shrink: 0;
  border-radius: 4px;
  overflow: hidden;
  background: var(--clr-green-lt);
  border: 1px solid var(--clr-border);
}
.library-book-card__cover-img { width: 100%; height: 100%; object-fit: cover; }
.library-book-card__cover--fallback {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .85rem; color: var(--clr-green);
  background: var(--clr-green-lt);
}

.library-book-card__body { flex: 1; min-width: 0; }
.library-book-card__title { font-size: .975rem; font-weight: 700; margin-bottom: .2rem; line-height: 1.35; }
.library-book-card__link { color: var(--clr-ink); }
.library-book-card__link:hover { color: var(--clr-green); }
.library-book-card__author { font-size: .825rem; color: var(--clr-muted); margin-bottom: .5rem; }

.library-book-card__meta { display: flex; flex-wrap: wrap; gap: .35rem; }
.library-book-card__tag {
  font-size: .7rem; background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: 4px; padding: .15rem .45rem; color: var(--clr-muted);
  display: inline-flex; align-items: center; gap: .25rem;
}
.library-book-card__tag--call { font-family: var(--font-mono); background: var(--clr-green-lt); border-color: #b8d4be; color: var(--clr-green-dk); font-size: .68rem; }
.library-book-card__tag--type { background: #fef6e4; border-color: #e8d9a0; color: #7a5c00; }

.library-book-card__aside { display: flex; flex-direction: column; align-items: flex-end; gap: .6rem; flex-shrink: 0; }
.library-book-card__rating { display: flex; align-items: center; gap: .3rem; font-size: .825rem; }
.library-book-card__stars { color: var(--clr-amber); }
.library-book-card__rating-val { font-weight: 700; color: var(--clr-ink); }

/* ── Location grid ────────────────────────────────────────────────────── */
.library-location-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: .875rem; }
.library-location-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex; flex-direction: column; gap: .3rem;
  transition: border-color .15s, box-shadow .15s;
}
.library-location-card:hover { border-color: var(--clr-green); box-shadow: var(--shadow-sm); }
.library-location-card__name { font-weight: 700; font-size: .95rem; }
.library-location-card__count { color: var(--clr-muted); font-size: .78rem; }

/* ── Subject pills ────────────────────────────────────────────────────── */
.library-subject-list { display: flex; flex-wrap: wrap; gap: .45rem; }
.library-subject-pill {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 20px;
  padding: .3rem .85rem;
  font-size: .78rem;
  color: var(--clr-ink);
  display: inline-flex; align-items: center; gap: .4rem;
  transition: all .15s;
}
.library-subject-pill:hover { background: var(--clr-green); color: #fff; border-color: var(--clr-green); }
.library-subject-pill__count { color: var(--clr-muted); font-size: .7rem; }
.library-subject-pill:hover .library-subject-pill__count { color: rgba(255,255,255,.7); }

/* ── Pagination ───────────────────────────────────────────────────────── */
.library-pagination { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-top: 2.5rem; }
.library-pagination__btn {
  padding: .45rem 1.1rem;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-green); font-size: .875rem;
  transition: all .15s;
}
.library-pagination__btn:hover { border-color: var(--clr-green); background: var(--clr-green); color: #fff; }
.library-pagination__info { color: var(--clr-muted); font-size: .825rem; }

/* ── Book detail page ─────────────────────────────────────────────────── */
.library-book-detail {
  display: grid;
  grid-template-columns: 160px 1fr 280px;
  gap: 2rem;
  margin-bottom: 2.5rem;
  align-items: start;
}
@media (max-width: 900px) {
  .library-book-detail { grid-template-columns: 130px 1fr; }
  .library-book-detail__location { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .library-book-detail { grid-template-columns: 1fr; }
}

/* Large cover on detail page */
.library-book-detail__cover {
  width: 100%;
  aspect-ratio: 2/3;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--clr-green-lt);
  border: 1px solid var(--clr-border);
}
.library-cover-img { width: 100%; height: 100%; object-fit: cover; }

/* Cover placeholder (detail page) */
.library-cover-placeholder {
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: .5rem; padding: 1rem;
  background: linear-gradient(160deg, var(--clr-green) 0%, var(--clr-green-dk) 100%);
  color: rgba(255,255,255,.9);
  text-align: center;
}
.library-cover-placeholder__callno { font-family: var(--font-mono); font-size: .65rem; color: rgba(255,255,255,.6); }
.library-cover-placeholder__initials { font-size: 2.5rem; font-weight: 900; line-height: 1; }
.library-cover-placeholder__author { font-size: .7rem; color: rgba(255,255,255,.7); }

.library-book-detail__title { font-size: 1.6rem; font-weight: 800; line-height: 1.25; margin-bottom: .5rem; letter-spacing: -.02em; }
.library-book-detail__author { font-size: 1rem; margin-bottom: 1rem; color: var(--clr-muted); }
.library-book-detail__author a { color: var(--clr-green); }
.library-book-detail__rating { display: flex; align-items: center; gap: .75rem; margin-bottom: 1.25rem; }
.library-stars { color: var(--clr-amber); letter-spacing: .04em; }

.library-book-detail__meta { width: 100%; border-collapse: collapse; font-size: .875rem; margin-top: 1rem; }
.library-book-detail__meta th { text-align: left; width: 90px; color: var(--clr-muted); padding: .45rem 0; font-weight: 500; vertical-align: top; }
.library-book-detail__meta td { padding: .45rem 0; border-bottom: 1px solid var(--clr-border); }
.library-book-detail__meta tr:last-child td { border-bottom: none; }

/* Location panel */
.library-location-panel {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.library-location-panel__title { font-size: .95rem; font-weight: 700; margin-bottom: 1rem; display: flex; align-items: center; gap: .5rem; color: var(--clr-ink); }
.library-location-panel__section { font-size: .85rem; color: var(--clr-muted); margin-bottom: .5rem; }
.library-location-panel__callno { font-family: var(--font-mono); font-size: 1.4rem; font-weight: 800; color: var(--clr-green); margin-bottom: .3rem; }
.library-location-panel__hint { font-size: .78rem; color: var(--clr-muted); margin-bottom: 1rem; }
.library-location-panel__copies { margin-bottom: .75rem; }

.library-availability { font-size: .8rem; font-weight: 700; padding: .3rem .85rem; border-radius: 20px; letter-spacing: .02em; }
.library-availability--in { background: var(--clr-green-lt); color: var(--clr-green-dk); }
.library-availability--out { background: var(--clr-danger-lt); color: var(--clr-danger); }

.library-copy-list { margin-top: .75rem; font-size: .825rem; }
.library-copy-list summary { cursor: pointer; color: var(--clr-green); font-size: .825rem; }
.library-copy-list ul { list-style: none; display: flex; flex-direction: column; gap: .3rem; margin-top: .5rem; }
.library-copy-list__item { display: flex; gap: .6rem; align-items: center; }
.library-copy-list__item code { background: var(--clr-bg); padding: .1rem .4rem; border-radius: 4px; font-size: .75rem; font-family: var(--font-mono); }

/* ── Reviews ──────────────────────────────────────────────────────────── */
.library-review-form {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.library-review-form__title { font-size: .95rem; font-weight: 700; margin-bottom: 1rem; }
.library-review-form__actions { display: flex; gap: .75rem; margin-top: .875rem; }

.library-textarea {
  width: 100%; padding: .75rem 1rem;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-size: .875rem; font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-ink);
  resize: vertical; outline: none;
}
.library-textarea:focus { border-color: var(--clr-green); background: var(--clr-surface); }

/* CSS-only star picker (RTL trick) */
.library-star-picker { display: flex; flex-direction: row-reverse; justify-content: flex-end; gap: .2rem; margin-bottom: .875rem; }
.library-star-picker input { display: none; }
.library-star-picker label { font-size: 1.75rem; color: var(--clr-border); cursor: pointer; transition: color .1s; }
.library-star-picker label:hover,
.library-star-picker label:hover ~ label,
.library-star-picker input:checked ~ label { color: var(--clr-amber); }

.library-reviews { display: flex; flex-direction: column; gap: .875rem; margin-top: 1rem; }
.library-review {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
}
.library-review__header { display: flex; align-items: center; gap: .75rem; margin-bottom: .4rem; flex-wrap: wrap; }
.library-review__name { font-weight: 700; font-size: .875rem; }
.library-review__date { font-size: .775rem; }
.library-review__text { font-size: .875rem; color: var(--clr-muted); line-height: 1.6; }

/* ── Course grid ──────────────────────────────────────────────────────── */
.library-course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: .875rem; }
.library-course-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  display: flex; flex-direction: column; gap: .3rem;
  transition: border-color .15s, box-shadow .15s;
}
.library-course-card:hover { border-color: var(--clr-green); box-shadow: var(--shadow-sm); }
.library-course-card__code { font-family: var(--font-mono); font-size: .875rem; font-weight: 800; color: var(--clr-green); }
.library-course-card__title { font-size: .85rem; color: var(--clr-ink); line-height: 1.35; }
.library-course-card__sem { font-size: .75rem; color: var(--clr-muted); margin-top: .2rem; }

/* ── Badges ───────────────────────────────────────────────────────────── */
.library-badge { font-size: .68rem; font-weight: 700; padding: .2rem .6rem; border-radius: 20px; letter-spacing: .03em; text-transform: uppercase; }
.library-badge--primary { background: var(--clr-green); color: #fff; }
.library-badge--textbook { background: var(--clr-green-lt); color: var(--clr-green-dk); }
.library-badge--alternative { background: #fef6e4; color: #7a5c00; }
.library-badge--supplementary { background: var(--clr-bg); color: var(--clr-muted); border: 1px solid var(--clr-border); }

/* ── Admin layout ─────────────────────────────────────────────────────── */
.library-admin-layout { display: grid; grid-template-columns: 280px 1fr; gap: 1.5rem; margin-top: 1.5rem; }
@media (max-width: 768px) { .library-admin-layout { grid-template-columns: 1fr; } }

.library-admin-sidebar {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  height: fit-content;
  position: sticky; top: 80px;
}
.library-admin-sidebar__title { font-weight: 800; font-size: .95rem; margin-bottom: 1rem; }
.library-admin-filter { display: flex; gap: .5rem; margin-bottom: .875rem; }

.library-admin-course-list { list-style: none; max-height: 400px; overflow-y: auto; margin-bottom: 1rem; display: flex; flex-direction: column; gap: .15rem; }
.library-admin-course-list__item { display: flex; align-items: center; justify-content: space-between; border-radius: var(--radius-sm); padding: .3rem .4rem; }
.library-admin-course-list__item:hover, .library-admin-course-list__item.is-active { background: var(--clr-green-lt); }
.library-admin-course-list__item a { flex: 1; font-size: .82rem; color: var(--clr-ink); }
.library-admin-course-list__item a strong { color: var(--clr-green); display: block; font-family: var(--font-mono); font-size: .78rem; }

.library-admin-create summary { cursor: pointer; color: var(--clr-green); font-size: .85rem; font-weight: 600; }
.library-admin-create__form { display: flex; flex-direction: column; gap: .5rem; margin-top: .75rem; padding-top: .75rem; border-top: 1px solid var(--clr-border); }

.library-admin-main { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius); padding: 1.5rem; }
.library-admin-main__title { font-size: 1.05rem; font-weight: 800; margin-bottom: 1.25rem; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.library-admin-add-book { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--clr-border); }
.library-admin-add-book h3 { font-size: .95rem; font-weight: 700; margin-bottom: .875rem; }
.library-admin-book-search { display: flex; gap: .5rem; margin-bottom: 1rem; }

.library-admin-table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.library-admin-table th { text-align: left; padding: .5rem .75rem; border-bottom: 2px solid var(--clr-border); color: var(--clr-muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; }
.library-admin-table td { padding: .6rem .75rem; border-bottom: 1px solid var(--clr-bg); vertical-align: middle; }
.library-admin-table tr:hover td { background: var(--clr-bg); }
.library-admin-table--sm td, .library-admin-table--sm th { padding: .4rem .5rem; }

/* ── Stats bar ────────────────────────────────────────────────────────── */
.library-stats-bar { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.library-stat { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius); padding: 1rem 1.5rem; text-align: center; flex: 1; min-width: 110px; }
.library-stat__value { display: block; font-size: 1.75rem; font-weight: 900; color: var(--clr-green); letter-spacing: -.02em; }
.library-stat__label { font-size: .72rem; color: var(--clr-muted); text-transform: uppercase; letter-spacing: .06em; }

/* ── Inputs ───────────────────────────────────────────────────────────── */
.library-input {
  padding: .5rem .875rem;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-size: .875rem; font-family: var(--font-sans);
  background: var(--clr-bg); color: var(--clr-ink);
  outline: none; width: 100%;
}
.library-input:focus { border-color: var(--clr-green); background: var(--clr-surface); }
.library-input--sm { font-size: .825rem; padding: .35rem .7rem; }

/* ── Browse page header ───────────────────────────────────────────────── */
.library-browse-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }

/* ── Misc ─────────────────────────────────────────────────────────────── */
.library-muted { color: var(--clr-muted); }
.library-link { color: var(--clr-green); }
.library-link:hover { text-decoration: underline; }
.library-link--sm { font-size: .825rem; }

.library-empty { text-align: center; padding: 4rem 2rem; }
.library-empty__icon { font-size: 3rem; color: var(--clr-border); display: block; margin-bottom: 1rem; }
.library-empty__title { font-size: 1.25rem; font-weight: 700; margin-bottom: .5rem; }
.library-empty__text { color: var(--clr-muted); margin-bottom: 1.5rem; }

/* ── Responsive tweaks ────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .library-hero__title { font-size: 1.9rem; }
  .library-hero__form { flex-direction: column; box-shadow: none; }
  .library-hero__input, .library-hero__form .library-btn--primary {
    border-radius: var(--radius-sm); border: 2px solid var(--clr-border);
    width: 100%;
  }
  .library-book-card { flex-wrap: wrap; }
  .library-book-card__aside { flex-direction: row; width: 100%; justify-content: flex-end; }

  /* Header stacks: brand + search share the top row, the nav drops to its own
     full-width strip below (was display:none, which stranded mobile users with
     no way to reach Browse / Course Shelf / back to the portal). */
  .library-header__inner { gap: .6rem .9rem; }
  .library-header__brand { font-size: 1rem; }
  .library-header__search { order: 2; min-width: 0; max-width: none; }
  .library-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: .4rem;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .library-nav::-webkit-scrollbar { display: none; }
  .library-nav__link {
    flex: none;
    white-space: nowrap;
    background: rgba(255,255,255,.1);
    padding: .4rem .8rem;
  }
}

/* Wide data tables should scroll inside their own box, never the page. */
@media (max-width: 768px) {
  .library-admin-table { display: block; overflow-x: auto; white-space: nowrap; }
}