.back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  color: #1f4e7a;
  text-decoration: none;
  box-shadow: 0 6px 16px -8px rgba(0, 30, 60, 0.18), 0 0 0 1px rgba(0,0,0,0.03);
  transition: all 0.2s ease;
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 1.5rem;
}
.back-btn:hover {
  background: #0b2b4a;
  color: #fff;
  transform: translateX(-3px);
  box-shadow: 0 10px 22px -10px rgba(11, 43, 74, 0.5);
}

.book-form {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #0b2b4a;
  }

  /* ---------- Header ---------- */
  .book-form .edit-header { margin-bottom: 2rem; }
  .book-form .edit-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: #0b2b4a;
    margin: 0 0 0.4rem 0;
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    flex-wrap: wrap;
  }
  .book-form .edit-header .subtitle {
    font-size: 0.95rem;
    color: #7b98b3;
    margin: 0;
  }

  /* ---------- Form card ---------- */
  .book-form .form-card {
    background: #fff;
    border-radius: 2rem;
    padding: 2.5rem 2.5rem 2rem 2.5rem;
    box-shadow: 0 15px 40px -18px rgba(0, 30, 60, 0.15), 0 0 0 1px rgba(0,0,0,0.03);
    max-width: 780px;
    margin: 0 auto;
  }

  /* ---------- Section separators ---------- */
  .book-form .form-section {
    padding-bottom: 1.75rem;
    margin-bottom: 1.75rem;
    border-bottom: 1px solid #edf2f7;
  }
  .book-form .form-section:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
  }

  /* ---------- Form groups ---------- */
  .book-form .form-group { margin-bottom: 1.5rem; }
  .book-form .form-group:last-child { margin-bottom: 0; }
  .book-form .form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #7b98b3;
    margin-bottom: 0.5rem;
    display: block;
  }
  .book-form .form-control {
    border: 1.5px solid #e0e9f2;
    border-radius: 0.9rem;
    padding: 0.85rem 1.1rem;
    font-size: 1rem;
    color: #0b2b4a;
    background: #fbfdff;
    transition: all 0.15s ease;
    box-shadow: none;
  }
  .book-form .form-control:focus {
    border-color: #3b7cbf;
    background: #fff;
    box-shadow: 0 0 0 4px rgba(59, 124, 191, 0.12);
  }
  .book-form .form-control::placeholder { color: #b0c3d6; }
  .book-form .book-category-select-wrap { position: relative; }
  .book-form select.book-category-select {
    appearance: none;
    -webkit-appearance: none;
    display: block;
    width: 100%;
    height: 3.25rem;
    padding: 0 2.85rem 0 1.1rem;
    line-height: 1.4;
    cursor: pointer;
  }
  .book-form .book-category-select-wrap > i {
    position: absolute;
    top: 50%;
    right: 1.05rem;
    color: #36556d;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1;
    pointer-events: none;
    transform: translateY(-50%);
  }
  .book-form textarea.form-control {
    min-height: 140px;
    resize: vertical;
    line-height: 1.6;
  }
  .book-form .form-text {
    display: block;
    margin-top: 0.4rem;
    font-size: 0.8rem;
    color: #8ba0b8;
    font-weight: 400;
  }

  /* ---------- Checkbox ---------- */
  .book-form .form-check {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background: #f6f9fc;
    border-radius: 1rem;
    padding: 1.1rem 1.25rem;
    border: 1.5px solid #e5edf5;
    margin-bottom: 1.5rem;
  }
  .book-form .form-check:last-child { margin-bottom: 0; }
  .book-form .form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.15rem;
    flex-shrink: 0;
    cursor: pointer;
    accent-color: #0b2b4a;
  }
  .book-form .form-check-input:checked {
    background-color: #0b2b4a;
    border-color: #0b2b4a;
  }
  .book-form .form-check-label {
    font-size: 1rem;
    font-weight: 600;
    color: #0b2b4a;
    cursor: pointer;
    text-transform: none;
    letter-spacing: 0;
    margin: 0;
  }
  .book-form .form-check .form-text { margin-top: 0.2rem; }

  /* ---------- Platforms ---------- */
  .book-form .platforms-block {
    background: #f6f9fc;
    border-radius: 1rem;
    padding: 1.25rem 1.5rem;
    border: 1.5px solid #e5edf5;
    margin-bottom: 1.5rem;
  }
  .book-form .platforms-block:last-child { margin-bottom: 0; }
  .book-form .platforms-block .label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #7b98b3;
    display: block;
    margin-bottom: 0.9rem;
  }
  .book-form .platforms-icons {
    font-size: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }
  .book-form .platforms-icons i {
    transition: transform 0.15s;
    cursor: default;
  }
  .book-form .platforms-icons i:hover { transform: translateY(-3px); }

  /* ================================================
     IMAGE UPLOADER (identical to Edit page)
     ================================================ */
  .book-form .images-section { margin-bottom: 0; }

  .book-form .images-section .section-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #7b98b3;
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  .book-form .images-section .section-hint {
    font-size: 0.85rem;
    color: #8ba0b8;
    margin: 0 0 1.1rem 0;
    line-height: 1.5;
  }

  .book-form .dropzone {
    border: 2px dashed #c8dcee;
    border-radius: 1.25rem;
    padding: 2rem 1.5rem;
    text-align: center;
    background: #fbfdff;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
  }
  .book-form .dropzone:hover {
    border-color: #8db5db;
    background: #f3f8fd;
  }
  .book-form .dropzone.dragover {
    border-color: #3b7cbf;
    background: #e9f2fa;
    border-style: solid;
    box-shadow: 0 0 0 6px rgba(59, 124, 191, 0.08);
  }
  .book-form .dropzone.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
  }
  .book-form .dropzone .dz-icon {
    font-size: 2.4rem;
    color: #8db5db;
    display: block;
    margin-bottom: 0.6rem;
    transition: transform 0.2s;
  }
  .book-form .dropzone:hover .dz-icon { transform: translateY(-3px); }
  .book-form .dropzone .dz-title {
    font-size: 1rem;
    font-weight: 600;
    color: #0b2b4a;
    margin: 0 0 0.25rem 0;
  }
  .book-form .dropzone .dz-title .browse {
    color: #3b7cbf;
    text-decoration: underline;
    text-underline-offset: 3px;
  }
  .book-form .dropzone .dz-sub {
    font-size: 0.82rem;
    color: #8ba0b8;
    margin: 0;
  }
  .book-form .dropzone input[type="file"] { display: none; }

  .book-form .preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
  }
  .book-form .preview-grid:empty { display: none; }

  .book-form .preview-item {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    aspect-ratio: 2 / 3;
    background: #eef3f8;
    box-shadow: 0 6px 14px -8px rgba(0, 30, 60, 0.2), 0 0 0 1px rgba(0,0,0,0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    animation: fadeInUp 0.3s ease;
  }
  @keyframes fadeInUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  .book-form .preview-item:hover {
    box-shadow: 0 12px 24px -10px rgba(0, 30, 60, 0.35), 0 0 0 1px rgba(0,0,0,0.05);
  }
  .book-form .preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .book-form .preview-item .front-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #0b2b4a;
    color: #fff;
    font-size: 0.68rem;
    font-weight: 700;
    padding: 0.3rem 0.6rem;
    border-radius: 2rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 2;
  }
  .book-form .preview-item.is-front {
    box-shadow: 0 0 0 3px #3b7cbf, 0 12px 24px -10px rgba(59, 124, 191, 0.5);
  }

  .book-form .preview-item .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.0) 40%, rgba(0,0,0,0.75) 100%);
    opacity: 0;
    transition: opacity 0.2s ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 0.7rem;
    gap: 0.4rem;
  }
  .book-form .preview-item:hover .overlay,
  .book-form .preview-item:focus-within .overlay {
    opacity: 1;
  }
  .book-form .preview-item .overlay button {
    border: none;
    border-radius: 0.6rem;
    padding: 0.5rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    transition: background 0.15s, transform 0.1s;
    color: #fff;
  }
  .book-form .preview-item .overlay .btn-set-front {
    background: rgba(59, 124, 191, 0.95);
  }
  .book-form .preview-item .overlay .btn-set-front:hover {
    background: #3b7cbf;
  }
  .book-form .preview-item .overlay .btn-remove {
    background: rgba(176, 42, 42, 0.95);
  }
  .book-form .preview-item .overlay .btn-remove:hover {
    background: #b02a2a;
  }
  .book-form .preview-item .overlay button:active { transform: scale(0.97); }

  .book-form .image-counter {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: #5d7f9c;
    background: #eef3f8;
    padding: 0.3rem 0.75rem;
    border-radius: 2rem;
    margin-left: auto;
  }
  .book-form .image-counter.full { background: #fde8e8; color: #b02a2a; }

  /* ---------- Submit button ---------- */
  .book-form .form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 2rem;
    padding-top: 1.75rem;
    border-top: 1px solid #edf2f7;
  }
  .book-form .btn-submit {
    flex: 1;
    border-radius: 2rem;
    padding: 0.9rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    background: #0b2b4a;
    color: #fff;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    letter-spacing: -0.01em;
  }
  .book-form .btn-submit:hover {
    background: #123a5e;
    transform: translateY(-2px);
    box-shadow: 0 12px 24px -10px rgba(11, 43, 74, 0.45);
  }
  .book-form .btn-submit:active { transform: translateY(0); }

  .book-form .btn-cancel {
    border-radius: 2rem;
    padding: 0.9rem 1.75rem;
    font-weight: 600;
    font-size: 1rem;
    background: #fff;
    color: #5d7f9c;
    border: 1.5px solid #dde5ee;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: all 0.15s ease;
  }
  .book-form .btn-cancel:hover {
    background: #f6f9fc;
    border-color: #b8cfe4;
    color: #0b2b4a;
  }

  .book-form--edit .edit-header h2 .book-name {
    font-size: 1.35rem;
    font-weight: 600;
    color: #3b7cbf;
    font-style: italic;
    letter-spacing: -0.01em;
  }

  @media (max-width: 576px) {
    .book-form .form-card { padding: 1.75rem 1.25rem; }
    .book-form .edit-header h2 { font-size: 1.75rem; }
    .book-form--edit .edit-header h2 .book-name { font-size: 1.1rem; }
    .book-form .form-actions { flex-direction: column-reverse; }
    .book-form .preview-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  }

/* bump ?v=N in layout on change */


/* Shared book list, profile, and book-detail rules. */
.books-view {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #0b2b4a;
  }
.books-view .search-wrapper:focus-within {
    box-shadow: 0 12px 24px -8px rgba(13, 110, 253, 0.25), 0 0 0 2px rgba(13, 110, 253, 0.25);
  }
.books-view .search-wrapper .form-control::placeholder { color: #8ba0b8; }
.books-view .search-wrapper .btn-primary:hover {
    background: #123a5e;
    transform: scale(1.02);
  }
.books-view .book-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 22px 35px -12px rgba(0, 50, 90, 0.2), 0 0 0 1px rgba(13, 110, 253, 0.15);
  }
.books-view .book-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0) 55%, rgba(0,0,0,0.08) 100%);
    pointer-events: none;
  }
.books-view .book-cover:hover {
    filter: brightness(1.03) contrast(1.02);
  }
.books-view .book-title a:hover {
    color: #1a6fc4;
    text-decoration: underline;
    text-underline-offset: 3px;
  }
.books-view .empty-state i {
    font-size: 3.5rem;
    color: #b8d0e5;
    margin-bottom: 1rem;
    display: block;
  }
@media (max-width: 576px) {.books-view .book-grid { grid-template-columns: 1fr; }
}
@media (max-width: 576px) {.books-view .search-wrapper .btn-primary { padding: 0.75rem 1.25rem; }
}
@media (max-width: 992px) {.user-profile .profile-grid { grid-template-columns: 1fr; }
}
.user-profile .identity-card {
    background: #fff;
    border-radius: 1.75rem;
    padding: 2rem 1.75rem;
    box-shadow: 0 12px 30px -16px rgba(0, 30, 60, 0.15), 0 0 0 1px rgba(0,0,0,0.03);
    text-align: center;
    position: sticky;
    top: 1.5rem;
  }
.user-profile .avatar-ring img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    display: block;
  }
.user-profile .identity-name {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #0b2b4a;
    margin: 0.5rem 0 0.35rem 0;
    word-break: break-word;
  }
.user-profile .identity-email {
    font-size: 0.88rem;
    color: #5d7f9c;
    margin: 0 0 0.85rem 0;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    word-break: break-all;
  }
.user-profile .identity-email i { color: #8ba0b8; }
.user-profile .identity-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
  }
.user-profile .pill {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: 2rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border: 1px solid transparent;
    letter-spacing: 0.01em;
    white-space: nowrap;
  }
.user-profile .pill-verified {
    background: #e3f5ec;
    color: #0e6b3e;
    border-color: #c2ead7;
  }
.user-profile .identity-divider {
    height: 1px;
    background: #edf2f7;
    margin: 1.25rem 0;
    border: none;
  }
.user-profile .identity-section { text-align: left; }
.user-profile .identity-section .label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #7b98b3;
    margin-bottom: 0.4rem;
    display: block;
  }
.user-profile .identity-section .bio {
    font-size: 0.92rem;
    line-height: 1.55;
    color: #435e78;
    margin: 0;
    word-break: break-word;
  }
.user-profile .identity-section .meta-line {
    font-size: 0.9rem;
    color: #5d7f9c;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.45rem;
  }
.user-profile .identity-section .meta-line i { color: #8ba0b8; }
.user-profile .content-card {
    background: #fff;
    border-radius: 1.75rem;
    box-shadow: 0 12px 30px -16px rgba(0, 30, 60, 0.15), 0 0 0 1px rgba(0,0,0,0.03);
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }
.user-profile .tab-btn:hover {
    color: #1f4e7a;
    background: #f0f5fa;
  }
.user-profile .tab-btn.active {
    color: #0b2b4a;
    background: #fff;
  }
.user-profile .tab-btn.active::after {
    content: '';
    position: absolute;
    left: 0.9rem;
    right: 0.9rem;
    bottom: -1px;
    height: 2px;
    background: #0b2b4a;
    border-radius: 2px;
  }
.user-profile .tab-btn i { font-size: 1rem; }
.user-profile .tab-panel.active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.user-profile .avatar-ring .avatar-placeholder {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    color: #6d8295;
    font-size: 4.25rem;
}
.profile-photo-form { display: grid; justify-items: center; gap: .4rem; margin: 0 auto 1rem; color: #536c81; font-size: .82rem; }
.profile-photo-form input { max-width: 100%; font-size: .75rem; }
.profile-photo-form small { color: #718396; }
.profile-photo-form button { padding: .3rem .6rem; border: 1px solid #b9ccda; border-radius: .5rem; background: #f5f9fc; color: #36556d; font-family: inherit; font-size: .75rem; font-weight: 600; cursor: pointer; }

/* Shared sign-in and sign-up presentation */
.auth-page {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Segoe UI', Roboto, sans-serif;
  color: #0b2b4a;
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.25rem;
}

.auth-card {
  position: relative;
  max-width: 480px;
  width: 100%;
  padding: 3rem 2.5rem 2.5rem 2.5rem;
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.32);
  -webkit-backdrop-filter: blur(34px) saturate(190%);
  backdrop-filter: blur(34px) saturate(190%);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.75) inset,
    0 -1px 0 rgba(255, 255, 255, 0.3) inset,
    0 0 0 1px rgba(255, 255, 255, 0.5),
    0 30px 60px -20px rgba(0, 30, 60, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.45);
}
.auth-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.4) 0%,
    rgba(255, 255, 255, 0) 35%,
    rgba(255, 255, 255, 0) 65%,
    rgba(255, 255, 255, 0.2) 100%
  );
  pointer-events: none;
  opacity: 0.85;
}
.auth-card--signup { max-width: 500px; }

.auth-icon {
  position: relative;
  width: 76px;
  height: 76px;
  border-radius: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  background: linear-gradient(160deg, rgba(255,255,255,0.75), rgba(255,255,255,0.3));
  -webkit-backdrop-filter: blur(20px) saturate(200%);
  backdrop-filter: blur(20px) saturate(200%);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.85) inset,
    0 0 0 1px rgba(255,255,255,0.55),
    0 20px 40px -16px rgba(59, 124, 191, 0.45);
}
.auth-icon--admin { margin-bottom: 1.1rem; }
.auth-icon i {
  font-size: 1.9rem;
  color: #1f4e7a;
  filter: drop-shadow(0 2px 6px rgba(31, 78, 122, 0.25));
}
.auth-header { text-align: center; }

.auth-title {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 0.4rem 0;
  text-align: center;
  background: linear-gradient(180deg, #0b2b4a 0%, #1e4770 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.auth-title--admin { font-size: 2rem; }
.auth-sub {
  font-size: 0.95rem;
  line-height: 1.5;
  color: rgba(11, 43, 74, 0.72);
  margin: 0 auto 1.75rem auto;
  max-width: 340px;
  text-align: center;
  font-weight: 400;
}

.auth-alert {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.85rem 1rem;
  border-radius: 0.85rem;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  line-height: 1.4;
  border: 1px solid transparent;
}
.auth-alert i {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 1px;
}
.auth-alert--success {
  background: rgba(227, 245, 236, 0.75);
  color: #0b5232;
  border-color: #b3dfc9;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.auth-alert--success i { color: #1d8b56; }
.auth-alert--danger {
  background: rgba(253, 232, 232, 0.75);
  color: #8b1e1e;
  border-color: #fccfcf;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.auth-alert--danger i { color: #b02a2a; }

.auth-card .form-group { margin-bottom: 1.1rem; }
.auth-card label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(11, 43, 74, 0.7);
  margin-bottom: 0.45rem;
  display: block;
}
.auth-card .form-control {
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  border-radius: 0.85rem;
  padding: 0.8rem 1rem;
  font-size: 0.98rem;
  color: #0b2b4a;
  background: rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: all 0.18s ease;
  box-shadow: none;
  width: 100%;
}
.auth-card .form-control:focus {
  border-color: rgba(74, 125, 255, 0.55);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 0 0 4px rgba(74, 125, 255, 0.18);
  outline: none;
}
.auth-card .form-control::placeholder { color: rgba(11, 43, 74, 0.4); }
.auth-card .form-text {
  font-size: 0.78rem;
  color: rgba(11, 43, 74, 0.6);
  margin-top: 0.35rem;
  display: block;
}

.auth-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 1.5rem 0 1.25rem 0;
  flex-wrap: wrap;
}
.auth-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: #3b7cbf;
  text-decoration: none;
  transition: color 0.15s;
}
.auth-link:hover {
  color: #1f4e7a;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.auth-submit {
  width: 100%;
  border-radius: 999px;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: #fff;
  border: none;
  cursor: pointer;
  background: linear-gradient(180deg, #2a6ec9 0%, #0b2b4a 100%);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.25) inset,
    0 8px 20px -8px rgba(11, 43, 74, 0.55);
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.auth-submit:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.3) inset,
    0 12px 26px -10px rgba(11, 43, 74, 0.65);
}
.auth-submit:active {
  transform: translateY(0);
  filter: brightness(0.96);
}
.auth-submit--admin { margin-top: 0.5rem; }

.auth-terms {
  font-size: 0.75rem;
  color: rgba(11, 43, 74, 0.55);
  text-align: center;
  margin: 1rem 0 0 0;
  line-height: 1.5;
}

.auth-role {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #1f4e7a;
  background: rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.7) inset,
    0 4px 12px -6px rgba(0, 30, 60, 0.15);
  margin-bottom: 1.25rem;
}
.auth-role i { font-size: 0.8rem; color: #3b7cbf; }

.auth-back {
  display: flex;
  justify-content: center;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.5);
}
.auth-back a {
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(11, 43, 74, 0.7);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.15s;
}
.auth-back a:hover {
  color: #3b7cbf;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.auth-back a i { font-size: 0.9rem; }

@media (max-width: 576px) {
  .auth-page { padding: 2rem 1rem; }
  .auth-card { padding: 2.25rem 1.5rem; border-radius: 26px; }
  .auth-title,
  .auth-title--admin { font-size: 1.75rem; }
  .auth-icon { width: 64px; height: 64px; border-radius: 20px; }
  .auth-icon i { font-size: 1.55rem; }
  .auth-actions { flex-direction: column-reverse; align-items: stretch; }
  .auth-link { text-align: center; }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .auth-card { background: rgba(255, 255, 255, 0.85); }
  .auth-card .form-control { background: rgba(255, 255, 255, 0.95); }
  .auth-role { background: rgba(255, 255, 255, 0.85); }
}
.user-profile .panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    color: #0b2b4a;
    margin: 0 0 0.3rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
.user-profile .panel-sub {
    font-size: 0.9rem;
    color: #8ba0b8;
    margin: 0 0 1.5rem 0;
  }
.user-profile .books-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
.user-profile .book-row {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    gap: 1rem;
    align-items: center;
    background: #fbfdff;
    border: 1px solid #e5edf5;
    border-radius: 1rem;
    padding: 0.75rem 0.9rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.18s ease;
  }
.user-profile .book-row:hover {
    background: #f0f5fa;
    border-color: #c8dcee;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -12px rgba(0, 50, 90, 0.2);
    color: inherit;
  }
.user-profile .book-info { min-width: 0; }
.user-profile .book-title {
    font-size: 1rem;
    font-weight: 700;
    color: #0b2b4a;
    margin: 0 0 0.2rem 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: -0.01em;
  }
.user-profile .book-author {
    font-size: 0.82rem;
    color: #7b98b3;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
.user-profile .book-author strong {
    color: #5d7f9c;
    font-weight: 600;
  }
.user-profile .book-side {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.4rem;
    flex-shrink: 0;
  }
.user-profile .book-assigned {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 0.7rem;
    border-radius: 2rem;
    background: #fff3e0;
    color: #b85c00;
    border: 1px solid #ffe0b5;
    letter-spacing: 0.02em;
    text-transform: uppercase;
  }
.user-profile .book-open {
    color: #8ba0b8;
    font-size: 1rem;
    transition: color 0.15s, transform 0.15s;
  }
.user-profile .book-row:hover .book-open {
    color: #3b7cbf;
    transform: translate(2px, -2px);
  }
.user-profile .field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
  }
@media (max-width: 640px) {.user-profile .field-grid { grid-template-columns: 1fr; }
}
.user-profile .field { margin-bottom: 1rem; }
.user-profile .field.full { grid-column: 1 / -1; }
.user-profile .empty-books {
    background: #fbfdff;
    border: 1px dashed #d8e4ef;
    border-radius: 1.25rem;
    padding: 3rem 1.5rem;
    text-align: center;
    color: #7b98b3;
  }
.user-profile .empty-books i {
    font-size: 3rem;
    color: #b8d0e5;
    margin-bottom: 0.75rem;
    display: block;
  }
.user-profile .empty-books p {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
  }
.user-profile .empty-books .hint {
    font-size: 0.85rem;
    color: #8ba0b8;
    margin-top: 0.4rem;
    font-weight: 400;
  }
.book-detail {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #0b2b4a;
  }
.book-detail .search-wrapper {
    background: #fff;
    border-radius: 2rem;
    padding: 0.5rem 0.5rem 0.5rem 1.25rem;
    box-shadow: 0 8px 20px -8px rgba(0, 20, 30, 0.12), 0 0 0 1px rgba(0,0,0,0.02);
    display: flex;
    align-items: center;
    transition: box-shadow 0.2s;
    margin-top: 2rem;
    margin-bottom: 2rem;
  }
.book-detail .search-wrapper:focus-within {
    box-shadow: 0 12px 24px -8px rgba(13, 110, 253, 0.25), 0 0 0 2px rgba(13, 110, 253, 0.25);
  }
.book-detail .search-wrapper .form-control::placeholder { color: #8ba0b8; }
.book-detail .search-wrapper .btn-primary:hover {
    background: #123a5e;
    transform: scale(1.02);
  }
.book-detail .platforms .platform-icons {
    font-size: 1.9rem;
    display: flex;
    gap: 0.9rem;
    flex-wrap: wrap;
  }
.book-detail .platforms .platform-icons i {
    transition: transform 0.15s;
    cursor: default;
  }
.book-detail .platforms .platform-icons i:hover {
    transform: translateY(-3px);
  }
.book-detail .empty-state {
    background: #fff;
    border-radius: 2rem;
    padding: 4rem 2rem;
    text-align: center;
    box-shadow: 0 10px 30px -10px rgba(0, 20, 40, 0.08);
    border: 1px solid #e5edf5;
    color: #5d7f9c;
  }
.book-detail .empty-state i {
    font-size: 4rem;
    color: #b8d0e5;
    margin-bottom: 1rem;
    display: block;
  }
.book-detail .empty-state p {
    font-size: 1.15rem;
    font-weight: 500;
    margin: 0;
  }

/* bump ?v=N in layout on change */

/* Keep native ebook upload controls aligned within their rounded fields. */
.book-form .ebook-upload-section input[type="file"].form-control {
  display: flex;
  align-items: center;
  min-height: 3.25rem;
  padding: 0.4rem 0.65rem;
  line-height: 1.4;
  overflow: hidden;
}

.book-form .ebook-upload-section input[type="file"].form-control::file-selector-button {
  flex: 0 0 auto;
  margin: 0 0.75rem 0 0;
  padding: 0.55rem 0.85rem;
  line-height: 1.25;
  border: 0;
  border-radius: 0.55rem;
  vertical-align: middle;
}

.book-form .ebook-upload-section input[type="file"].form-control::-webkit-file-upload-button {
  margin: 0 0.75rem 0 0;
  padding: 0.55rem 0.85rem;
  line-height: 1.25;
  border: 0;
  border-radius: 0.55rem;
}
.tag-choice-list { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag-choice { cursor: pointer; }
.tag-choice input { position: absolute; opacity: 0; }
.tag-choice span { display: inline-block; padding: .4rem .75rem; border: 1px solid #cbd9e4; border-radius: 999px; background: #fff; color: #36556d; font-size: .85rem; }
.tag-choice input:checked + span { border-color: #21669b; background: #e8f3fb; color: #155783; }
.tag-choice input:focus-visible + span { outline: 2px solid #21669b; outline-offset: 2px; }