/* =============================================
   Bibliothèque École — SG Créations
   Palette : bleu marine / ciel — inspirée du Cahier journal
   ============================================= */

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

:root {
  --bg:         #EFF4FA;
  --surface:    #FFFFFF;
  --dark:       #0F1E2E;
  --mid:        #364F66;
  --light:      #6585A0;
  --border:     #C4D4E6;
  --accent:     #1A6FA8;
  --accent-h:   #1583CC;
  --accent-glow:rgba(26,111,168,.13);
  --warm:       #4A7A9B;
  --loan-col:   #C07840;
  --sky:        #6BBDE0;
  --radius:     12px;
  --shadow:     0 2px 18px rgba(15,30,46,.08), 0 1px 4px rgba(26,111,168,.05);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background:
    linear-gradient(135deg, rgba(147,210,255,.22), transparent 34%),
    linear-gradient(315deg, rgba(180,225,255,.32), transparent 40%),
    var(--bg);
  color: var(--dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 72px;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; }
button { border: 0; cursor: pointer; }

/* =============================================
   HEADER
   ============================================= */

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #0A1929;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.back-link {
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255,255,255,0.38);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}
.back-link:hover { color: var(--sky); }

.app-header h1 {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  text-align: center;
  flex: 1;
  letter-spacing: -0.01em;
}

.btn-add-quick {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: none;
  background: rgba(107,189,224,0.18);
  color: var(--sky);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.btn-add-quick:hover { background: rgba(107,189,224,0.32); }

/* =============================================
   REMINDER BANNER
   ============================================= */

.reminder-banner {
  background: linear-gradient(90deg, #1A4A6A, #1A6FA8);
  color: white;
  padding: 0 20px;
}

.reminder-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.reminder-item:last-child { border-bottom: none; }
.reminder-item-info { flex: 1; min-width: 0; }
.reminder-item-info strong { display: block; font-size: 0.88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.reminder-item-info span  { font-size: 0.78rem; opacity: 0.72; }
.reminder-item-actions { display: flex; gap: 6px; flex-shrink: 0; }

.btn-reminder {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.35);
  background: transparent;
  color: white;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}
.btn-reminder:hover   { background: rgba(255,255,255,0.14); }
.btn-reminder.solid   { background: rgba(255,255,255,0.18); }

/* =============================================
   BOTTOM NAVIGATION
   ============================================= */

.app-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  background: #0A1929;
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 0 4px;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 4px 8px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.32);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.66rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s;
  position: relative;
}
.nav-tab .tab-icon { width: 22px; height: 22px; flex-shrink: 0; }
.nav-tab.active    { color: var(--sky); }
.nav-tab.active .tab-icon-bar { display: block; }

.badge {
  position: absolute;
  top: 6px;
  right: calc(50% - 22px);
  min-width: 17px; height: 17px;
  background: var(--accent);
  color: white;
  border-radius: 50px;
  font-size: 0.62rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  padding: 0 4px;
}

/* =============================================
   MAIN / TAB PANES
   ============================================= */

.app-main {
  flex: 1;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px;
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.section-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

/* =============================================
   SHELF TOOLBAR
   ============================================= */

.shelf-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.filter-select {
  flex: 1;
  min-width: 120px;
  padding: 9px 28px 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--dark);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.84rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236585A0' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color 0.2s;
}
.filter-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

/* =============================================
   BOOKS GRID
   ============================================= */

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 14px;
}

.book-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  border: 1px solid var(--border);
  text-align: left;
}
.book-card:hover, .book-card:focus {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(15,30,46,.14), 0 2px 8px rgba(26,111,168,.1);
  outline: 2px solid var(--sky);
  outline-offset: 2px;
}

.book-cover {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  display: block;
}

.book-cover-placeholder {
  width: 100%;
  aspect-ratio: 2/3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #B8D8F0, #90BEE0);
  font-size: 2.5rem;
}

.book-card-info   { padding: 10px 11px 12px; }
.book-card-title  {
  font-size: 0.82rem; font-weight: 600; color: var(--dark);
  line-height: 1.3;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 3px;
}
.book-card-author { font-size: 0.74rem; color: var(--light); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.book-card-genre  {
  display: inline-block; margin-top: 6px;
  font-size: 0.67rem; font-weight: 600;
  color: var(--accent); background: var(--accent-glow);
  padding: 2px 8px; border-radius: 50px;
}

.book-lent-badge {
  position: absolute; top: 7px; right: 7px;
  background: var(--loan-col); color: white;
  font-size: 0.62rem; font-weight: 700;
  padding: 3px 7px; border-radius: 50px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
}

/* =============================================
   LOANS STATS BAR
   ============================================= */

.loans-stats {
  display: flex; gap: 12px;
  margin-bottom: 20px; flex-wrap: wrap;
}

.stat-chip {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 50px;
  padding: 7px 16px;
  font-size: 0.82rem; font-weight: 600;
  color: var(--mid);
  box-shadow: var(--shadow);
}
.stat-chip.overdue {
  border-color: rgba(181,99,90,0.35);
  color: #B5635A;
  background: rgba(181,99,90,0.05);
}

/* =============================================
   EMPTY STATE
   ============================================= */

.empty-state { text-align: center; padding: 60px 20px; }
.empty-icon  { font-size: 3rem; margin-bottom: 12px; line-height: 1; }
.empty-title { font-size: 1rem; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.empty-sub   { font-size: 0.86rem; color: var(--light); margin-bottom: 22px; line-height: 1.6; }

/* =============================================
   ADD TAB
   ============================================= */

.add-intro   { max-width: 380px; margin: 0 auto; }
.add-methods { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 10px 0; }

.add-method-card {
  width: 100%;
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  padding: 22px 20px;
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  font-family: 'DM Sans', sans-serif;
  color: var(--dark);
  box-shadow: var(--shadow);
}
.add-method-card:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 6px 20px rgba(26,111,168,.12);
}

.method-icon              { font-size: 2.2rem; }
.add-method-card strong   { font-size: 0.94rem; font-weight: 600; }
.add-method-card span     { font-size: 0.78rem; color: var(--light); }

.method-divider {
  font-size: 0.78rem; color: var(--light); width: 100%;
  text-align: center; position: relative;
}
.method-divider::before, .method-divider::after {
  content: ''; position: absolute; top: 50%; width: 42%;
  height: 1px; background: var(--border);
}
.method-divider::before { left: 0; }
.method-divider::after  { right: 0; }

.isbn-row               { display: flex; gap: 8px; width: 100%; }
.isbn-row .text-input   { flex: 1; }

.btn-text {
  background: none; border: none;
  color: var(--accent); font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem; font-weight: 500;
  cursor: pointer; padding: 4px 0;
  transition: color 0.2s;
}
.btn-text:hover { color: var(--warm); }

/* =============================================
   SCANNER
   ============================================= */

.scanner-wrap   { max-width: 400px; margin: 0 auto; text-align: center; }
.scan-hint      { font-size: 0.85rem; color: var(--light); margin-bottom: 14px; line-height: 1.5; }

#reader { border-radius: var(--radius); overflow: hidden; background: #111; }
#reader__scan_region { border-radius: var(--radius); }
#reader__dashboard   { font-family: 'DM Sans', sans-serif !important; }
#reader__dashboard_section_swaplink { color: var(--accent) !important; }
#html5-qrcode-button-camera-permission,
#html5-qrcode-button-camera-start,
#html5-qrcode-button-camera-stop {
  font-family: 'DM Sans', sans-serif !important;
  background: var(--accent) !important;
  color: white !important;
  border: none !important;
  border-radius: 50px !important;
  padding: 8px 18px !important;
  cursor: pointer !important;
}

.btn-stop {
  margin-top: 12px; width: 100%;
  padding: 11px; background: rgba(15,30,46,0.06);
  border: 1.5px solid var(--border); border-radius: 50px;
  font-family: 'DM Sans', sans-serif; font-size: 0.88rem;
  font-weight: 500; color: var(--dark); cursor: pointer;
  transition: background 0.2s;
}
.btn-stop:hover { background: rgba(15,30,46,0.11); }

/* =============================================
   BOOK FORM
   ============================================= */

.book-form    { max-width: 480px; margin: 0 auto; }
.form-header  { margin-bottom: 22px; }
.form-header h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.25rem; font-weight: 600; color: var(--dark);
}

.form-layout {
  display: flex; gap: 18px; align-items: flex-start; margin-bottom: 24px;
}

.form-cover-preview {
  flex-shrink: 0; width: 90px; height: 136px; border-radius: 8px;
  background: linear-gradient(145deg, #B8D8F0, #90BEE0);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem; color: var(--light); text-align: center; line-height: 1.4; overflow: hidden;
}
.form-cover-preview img { width: 100%; height: 100%; object-fit: cover; }

.form-fields { flex: 1; display: flex; flex-direction: column; gap: 13px; }

.field-group { display: flex; flex-direction: column; gap: 5px; }
.field-group label {
  font-size: 0.76rem; font-weight: 700; color: var(--mid);
  text-transform: uppercase; letter-spacing: 0.5px;
}

.text-input {
  padding: 10px 12px;
  border: 1.5px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--dark);
  font-family: 'DM Sans', sans-serif; font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s; width: 100%;
}
.text-input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.text-input::placeholder { color: rgba(101,133,160,0.45); }

.form-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* =============================================
   BUTTONS
   ============================================= */

.btn-primary {
  padding: 11px 22px;
  background: var(--accent); color: white;
  border: none; border-radius: 50px;
  font-family: 'DM Sans', sans-serif; font-size: 0.9rem; font-weight: 700;
  cursor: pointer; transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(26,111,168,.28);
  letter-spacing: 0.01em;
}
.btn-primary:hover { background: var(--accent-h); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(26,111,168,.35); }

.btn-secondary {
  padding: 11px 22px;
  background: rgba(15,30,46,0.05); color: var(--mid);
  border: 1.5px solid var(--border); border-radius: 50px;
  font-family: 'DM Sans', sans-serif; font-size: 0.9rem; font-weight: 600;
  cursor: pointer; transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.btn-secondary:hover { border-color: var(--mid); color: var(--dark); background: rgba(15,30,46,0.08); }

.btn-sm { padding: 7px 14px; font-size: 0.8rem; }

.btn-danger {
  padding: 11px 22px;
  background: transparent; color: #B22222;
  border: 1.5px solid rgba(178,34,34,0.25); border-radius: 50px;
  font-family: 'DM Sans', sans-serif; font-size: 0.88rem; font-weight: 500;
  cursor: pointer; transition: all 0.2s; width: 100%;
}
.btn-danger:hover { background: rgba(178,34,34,0.07); border-color: rgba(178,34,34,0.45); }

.btn-outline-accent {
  padding: 11px 22px;
  background: transparent; color: var(--accent);
  border: 1.5px solid var(--accent); border-radius: 50px;
  font-family: 'DM Sans', sans-serif; font-size: 0.9rem; font-weight: 600;
  cursor: pointer; transition: background 0.2s, color 0.2s;
}
.btn-outline-accent:hover { background: var(--accent); color: white; }

/* =============================================
   API LOADING SPINNER
   ============================================= */

.api-loading { text-align: center; padding: 50px 20px; }
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  margin: 0 auto 14px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.api-loading p { font-size: 0.88rem; color: var(--light); }

/* =============================================
   LOANS LIST
   ============================================= */

.loan-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  display: flex; gap: 14px; padding: 14px; align-items: flex-start;
  margin-bottom: 12px;
}

.loan-cover {
  width: 52px; height: 78px; border-radius: 6px; flex-shrink: 0;
  background: linear-gradient(145deg, #B8D8F0, #90BEE0);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; overflow: hidden;
}
.loan-cover img { width: 100%; height: 100%; object-fit: cover; border-radius: 6px; }

.loan-info  { flex: 1; min-width: 0; }
.loan-title { font-size: 0.9rem; font-weight: 600; color: var(--dark); margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.loan-author { font-size: 0.78rem; color: var(--light); margin-bottom: 8px; }
.loan-meta  { font-size: 0.78rem; color: var(--mid); margin-bottom: 10px; line-height: 1.5; }
.loan-meta strong { color: var(--loan-col); }
.loan-overdue { color: #B5635A !important; font-weight: 600; }

.loan-student-class {
  display: inline-block; font-size: 0.7rem; font-weight: 600;
  padding: 2px 8px; background: var(--accent-glow); color: var(--accent);
  border-radius: 50px; margin-bottom: 8px;
}

.loan-actions { display: flex; flex-wrap: wrap; gap: 6px; }

.btn-loan-action {
  font-size: 0.76rem; font-weight: 600;
  padding: 5px 12px; border-radius: 50px;
  border: 1.5px solid var(--border);
  background: transparent; color: var(--mid);
  cursor: pointer; transition: all 0.2s;
}
.btn-loan-action:hover { border-color: var(--mid); color: var(--dark); background: rgba(15,30,46,0.04); }
.btn-loan-action.primary { background: var(--accent); border-color: var(--accent); color: white; }
.btn-loan-action.primary:hover { background: var(--accent-h); border-color: var(--accent-h); }

/* =============================================
   STUDENTS TAB
   ============================================= */

.students-actions-top {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-bottom: 4px;
}
.students-actions-top .section-title { margin-bottom: 0; }

.students-io-btns { display: flex; gap: 8px; flex-shrink: 0; margin-top: 4px; }

/* Import depuis cahier-journal */
.btn-import-cj {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 14px; font-size: 0.8rem; font-weight: 600;
  background: rgba(26,111,168,.08); color: var(--accent);
  border: 1.5px solid rgba(26,111,168,.25); border-radius: 50px;
  cursor: pointer; transition: all 0.2s; white-space: nowrap;
  font-family: 'DM Sans', sans-serif;
}
.btn-import-cj:hover { background: var(--accent); color: white; border-color: var(--accent); }

.class-section {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  margin-bottom: 16px; overflow: hidden;
}

.class-section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 13px 16px; border-bottom: 1px solid var(--border);
  background: rgba(26,111,168,.03);
}

.class-section-title {
  font-family: 'Playfair Display', serif;
  font-size: 1rem; font-weight: 600; color: var(--dark);
}

.class-count { font-size: 0.76rem; color: var(--light); font-weight: 400; margin-left: 6px; }

.btn-add-student {
  font-size: 0.76rem; font-weight: 600;
  padding: 5px 12px; border-radius: 50px;
  border: 1.5px solid var(--accent);
  background: transparent; color: var(--accent);
  cursor: pointer; transition: all 0.2s; white-space: nowrap;
}
.btn-add-student:hover { background: var(--accent); color: white; }

.student-list { list-style: none; }

.student-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.student-row:last-child { border-bottom: none; }
.student-row:hover { background: rgba(26,111,168,.03); }

.student-row-name { font-size: 0.88rem; font-weight: 500; color: var(--dark); }

.btn-delete-student {
  background: none; border: none; cursor: pointer;
  color: var(--light); font-size: 0.8rem; padding: 4px 8px;
  border-radius: 6px; transition: color 0.2s, background 0.2s;
}
.btn-delete-student:hover { color: #B22222; background: rgba(178,34,34,0.07); }

.new-class-wrap { text-align: center; padding: 20px 0 8px; }

/* =============================================
   AUTOCOMPLETE / BORROWER CHIP
   ============================================= */

.autocomplete-wrap { position: relative; }
.borrower-field    { display: flex; flex-direction: column; gap: 6px; }

.borrower-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-glow);
  border: 1.5px solid rgba(26,111,168,.3);
  border-radius: 50px; padding: 6px 12px 6px 14px;
  font-size: 0.86rem; font-weight: 600; color: var(--accent); width: fit-content;
}

.borrower-chip-remove {
  background: none; border: none; cursor: pointer;
  color: var(--accent); font-size: 1rem; line-height: 1;
  padding: 0; opacity: 0.6; transition: opacity 0.15s;
}
.borrower-chip-remove:hover { opacity: 1; }

.autocomplete-list {
  position: absolute; top: calc(100% + 4px); left: 0; right: 0; z-index: 50;
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: 10px; box-shadow: 0 8px 28px rgba(15,30,46,0.13);
  list-style: none; max-height: 200px; overflow-y: auto;
}

.autocomplete-item {
  padding: 10px 14px; cursor: pointer; font-size: 0.88rem; color: var(--dark);
  border-bottom: 1px solid var(--border); transition: background 0.15s;
  display: flex; justify-content: space-between; align-items: center;
}
.autocomplete-item:last-child { border-bottom: none; }
.autocomplete-item:hover,
.autocomplete-item[aria-selected="true"] { background: var(--accent-glow); }

.autocomplete-item-class { font-size: 0.74rem; color: var(--light); font-weight: 400; }

/* =============================================
   MODALS
   ============================================= */

.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,25,41,0.52);
  display: flex; align-items: flex-end; justify-content: center;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--bg);
  border-radius: 20px 20px 0 0;
  width: 100%; max-width: 500px;
  max-height: 90vh; overflow-y: auto;
  padding: 24px 20px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 0));
  position: relative;
  animation: slideUp 0.26s cubic-bezier(.25,.8,.25,1);
}

@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.modal-sm { max-height: 70vh; }

.modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 30px; height: 30px; border-radius: 50%; border: none;
  background: var(--border); color: var(--dark);
  font-size: 1.2rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s; line-height: 1;
}
.modal-close:hover { background: #aabccf; }

.modal-body h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.2rem; font-weight: 600; color: var(--dark); margin-bottom: 20px;
}
.modal-body .field-group { margin-bottom: 16px; }

.input-with-unit { display: flex; align-items: center; gap: 8px; }
.input-with-unit .text-input { flex: 1; }
.unit { font-size: 0.85rem; color: var(--light); white-space: nowrap; }

.import-textarea { min-height: 100px; resize: vertical; font-size: 0.78rem; font-family: monospace; }

/* Book detail */
.book-detail-cover {
  width: 100%; max-height: 220px; object-fit: cover;
  border-radius: 12px; margin-bottom: 16px;
}
.book-detail-cover-placeholder {
  width: 100%; height: 160px;
  background: linear-gradient(145deg, #B8D8F0, #90BEE0);
  border-radius: 12px; display: flex; align-items: center;
  justify-content: center; font-size: 4rem; margin-bottom: 16px;
}
.book-detail-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem; font-weight: 600; color: var(--dark);
  margin-bottom: 4px; line-height: 1.2;
}
.book-detail-author { font-size: 0.9rem; color: var(--mid); margin-bottom: 14px; }
.book-detail-meta   { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 18px; }
.meta-chip {
  font-size: 0.76rem; font-weight: 600;
  padding: 4px 12px; border-radius: 50px;
  background: var(--accent-glow); color: var(--accent);
}

.book-detail-lent-info {
  background: rgba(192,120,64,0.07);
  border: 1px solid rgba(192,120,64,0.2);
  border-radius: 10px; padding: 12px 14px; margin-bottom: 18px;
  font-size: 0.86rem; color: var(--mid); line-height: 1.6;
}
.book-detail-lent-info strong { color: var(--loan-col); }

.book-detail-actions { display: flex; flex-direction: column; gap: 9px; }
.book-detail-actions .btn-primary,
.book-detail-actions .btn-secondary { width: 100%; text-align: center; }

/* =============================================
   TOAST
   ============================================= */

.toast {
  position: fixed;
  bottom: calc(72px + 14px); left: 50%; transform: translateX(-50%);
  background: #0A1929; color: white;
  padding: 10px 22px; border-radius: 50px;
  font-size: 0.84rem; font-weight: 500; z-index: 300;
  white-space: nowrap;
  animation: toastAnim 3s ease forwards;
  box-shadow: 0 4px 20px rgba(10,25,41,0.28);
}

@keyframes toastAnim {
  0%   { opacity: 0; transform: translateX(-50%) translateY(8px); }
  12%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  78%  { opacity: 1; }
  100% { opacity: 0; }
}

/* =============================================
   DESKTOP / RESPONSIVE
   ============================================= */

@media (min-width: 600px) {
  .books-grid { grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); }
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
    padding-top: 96px;
  }

  .app-header {
    position: fixed;
    top: 0;
    height: 52px;
  }

  .app-nav {
    position: fixed;
    top: 52px; bottom: auto; left: 50%; transform: translateX(-50%);
    width: 100%; max-width: 760px;
    border-top: none;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    padding: 0; height: 44px;
  }

  .nav-tab { flex-direction: row; gap: 7px; font-size: 0.8rem; padding: 0 16px; }
  .nav-tab .tab-icon { width: 17px; height: 17px; }

  .badge { position: static; transform: none; margin-left: 2px; }

  .modal-overlay { align-items: center; padding: 20px; }
  .modal { border-radius: 20px; max-height: 82vh; }

  .toast { bottom: 24px; }

  .books-grid { grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); }
}