/********************************************************
 * Biblioteka Minimalist Stylesheet
 * Inspired by petras.kudaras.lt
 ********************************************************/

/* ============================================
   1. CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Colors - Warm minimalism */
  --color-text: #1a1a1a;
  --color-background: #fefefe;
  --color-link: #2563eb;
  --color-link-visited: #7c3aed;
  --color-link-hover: #1e40af;
  --color-border: #d4d4d4;
  --color-muted: #737373;
  --color-accent: #8b5cf6;
  --color-success: #059669;

  /* Typography */
  --font-family-serif: 'Iowan Old Style', 'Palatino Linotype', 'URW Palladio L', P052, serif;
  --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family: var(--font-family-sans);
  --font-size-base: 17px;
  --line-height-base: 1.65;

  /* Spacing scale */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Layout */
  --max-width: 1200px;
  --container-padding: 2rem;
}

/* ============================================
   2. RESET & BASE STYLES
   ============================================ */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
  padding: var(--spacing-xxl) 0;
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-serif);
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: 2.25rem; letter-spacing: -0.025em; }
h2 { font-size: 1.75rem; letter-spacing: -0.02em; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.2rem; }
h5 { font-size: 1.05rem; }
h6 { font-size: 0.95rem; }

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

a:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

a:visited {
  color: var(--color-link);
}

small, .small {
  font-size: 0.875rem;
}

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

/* ============================================
   4. LAYOUT
   ============================================ */
.container,
.container-fluid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  width: 100%;
}

/* ============================================
   5. HEADER & NAVIGATION
   ============================================ */
header {
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-md) 0;
}

.header-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-family: var(--font-family-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.site-title:visited {
  color: var(--color-accent);
}

.site-title:hover {
  color: var(--color-link);
}

.mobile-buttons {
  display: none;
  gap: var(--spacing-sm);
}

.mobile-menu-toggle,
.mobile-filter-toggle {
  background: none;
  border: 2px solid var(--color-text);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-text);
  border-radius: 4px;
}

.mobile-menu-toggle:hover,
.mobile-filter-toggle:hover {
  background: var(--color-text);
  color: #fff;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  align-items: baseline;
  font-size: 0.95rem;
}

header nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}

header nav a:visited {
  color: var(--color-text);
}

header nav a:hover {
  color: var(--color-link);
  border-bottom-color: var(--color-link);
}

header nav form {
  display: inline;
  margin: 0;
}

header nav button[type="submit"] {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-link);
  text-decoration: none;
  cursor: pointer;
  font: inherit;
}

header nav button[type="submit"]:hover {
  text-decoration: underline;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  header {
    padding: var(--spacing-sm) 0;
  }

  .mobile-buttons {
    display: flex;
  }

  header nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-background);
    border-bottom: 2px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-md);
    z-index: 1000;
  }

  header nav.show {
    display: flex;
  }

  header nav a {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
  }

  header nav a:last-of-type {
    border-bottom: none;
  }

  header nav form {
    width: 100%;
    padding: var(--spacing-sm) 0;
  }

  header nav button[type="submit"] {
    width: 100%;
    text-align: left;
  }

  header {
    position: relative;
  }
}

/* ============================================
   6. FOOTER
   ============================================ */
footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xxl);
}

footer p {
  color: var(--color-muted);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

footer p:last-child {
  margin-bottom: 0;
}

/* ============================================
   7. FORMS
   ============================================ */
/* Form max-width only for simple forms (login, etc), not for book forms */
form:not(.book-form) {
  max-width: 800px;
}

/* Fixed buttons in sidebar - always visible at top */
.sticky-buttons {
  position: fixed;
  top: 6rem;
  z-index: 1000;
  background-color: var(--color-background);
  padding: var(--spacing-md);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* On desktop, position in sidebar area with proper width */
@media (min-width: 992px) {
  .sticky-buttons {
    /* Calculate right position to align with container sidebar */
    right: max(1rem, calc((100vw - 1140px) / 2 + 1rem));
    /* Width should be 1/4 of container minus some spacing */
    width: min(250px, calc(1140px * 0.25 - 3rem));
  }
}

/* On tablets and smaller, center the buttons */
@media (max-width: 991px) {
  .sticky-buttons {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: auto;
  }
}

fieldset {
  border: none;
  padding: 0;
  margin: var(--spacing-xl) 0;
}

legend {
  font-size: 1.25rem;
  font-weight: normal;
  padding: 0;
  margin-bottom: var(--spacing-md);
}

label,
.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  margin-top: var(--spacing-md);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="file"],
select,
textarea,
.form-control,
.form-select {
  width: 100%;
  border: 1px solid var(--color-border);
  padding: var(--spacing-sm);
  font-family: inherit;
  font-size: inherit;
  background: var(--color-background);
  color: var(--color-text);
  border-radius: 0;
  box-shadow: none;
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  margin-right: var(--spacing-xs);
}

textarea {
  min-height: 100px;
  resize: vertical;
}

button,
input[type="submit"],
.btn,
a.btn {
  background: #fff !important;
  border: 2px solid var(--color-text) !important;
  padding: var(--spacing-sm) var(--spacing-lg);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  text-decoration: none !important;
  display: inline-block;
  color: var(--color-text) !important;
  border-radius: 4px;
  box-shadow: none !important;
  transition: all 0.2s ease;
}

button:hover,
input[type="submit"]:hover,
.btn:hover,
a.btn:hover {
  background: var(--color-text) !important;
  border-color: var(--color-text) !important;
  color: #fff !important;
  text-decoration: none !important;
}

/* Neutralize all Bootstrap button variants */
.btn-primary,
.btn-secondary,
.btn-danger,
.btn-warning,
.btn-success,
.btn-info,
.btn-light,
.btn-dark,
.btn-outline-primary,
.btn-outline-secondary,
.btn-outline-danger,
.btn-outline-warning {
  background: #fff !important;
  border: 2px solid var(--color-text) !important;
  color: var(--color-text) !important;
  box-shadow: none !important;
  border-radius: 4px;
  font-weight: 600;
}

.btn-primary:hover,
.btn-secondary:hover,
.btn-danger:hover,
.btn-warning:hover,
.btn-success:hover,
.btn-info:hover,
.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-outline-danger:hover,
.btn-outline-warning:hover {
  background: var(--color-text) !important;
  color: #fff !important;
  border-color: var(--color-text) !important;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
}

/* ============================================
   8. BOOK LIST & GRID
   ============================================ */
.book-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.book-item {
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.book-item:last-child {
  border-bottom: none;
}

.book-item-content {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.book-item-text {
  flex: 1;
}

.book-item-image {
  flex-shrink: 0;
  width: 150px;
}

.book-item-image img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--color-border);
}

.book-item h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.book-item h3 a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: none;
}

.book-item h3 a:hover {
  color: var(--color-link);
  border-bottom: 2px solid var(--color-link);
}

.book-item .authors,
.book-item .meta {
  color: var(--color-muted);
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

.book-item .price {
  font-weight: 600;
  color: var(--color-success);
  font-size: 1.1rem;
}

/* Filter sidebar */
.filter-sidebar {
  padding: var(--spacing-lg);
  background: #fafafa;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: var(--spacing-xl);
}

.filter-sidebar h5 {
  margin-top: 0;
  font-weight: 600;
  font-family: var(--font-family-serif);
}

/* Align results header with filter sidebar */
.col-lg-9 > .d-flex h2 {
  margin-top: 0;
}

/* Mobile filter sidebar */
@media (max-width: 991px) {
  .filter-sidebar-wrapper {
    display: none;
  }

  .filter-sidebar-wrapper.show {
    display: block;
  }
}

/* ============================================
   9. BOOK DETAIL
   ============================================ */
.book-detail {
  max-width: 800px;
}

.book-images {
  margin: var(--spacing-xl) 0;
}

.book-images img {
  max-width: 100%;
  height: auto;
  margin-bottom: var(--spacing-md);
  display: block;
}

.caption {
  color: var(--color-muted);
  font-size: 0.875rem;
  margin-top: calc(var(--spacing-sm) * -1);
  margin-bottom: var(--spacing-md);
}

/* Carousel */
.carousel {
  margin: var(--spacing-xl) 0;
}

.carousel-inner {
  text-align: center;
}

.carousel-item {
  text-align: center;
}

.carousel-item img {
  max-width: 100%;
  max-height: 70vh;
  height: auto;
  width: auto;
  display: inline-block;
  object-fit: contain;
}

.carousel-caption-below {
  padding: var(--spacing-md) 0;
  background: none;
  color: var(--color-muted);
  position: static;
  text-align: center;
}

.carousel-caption-below p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Carousel controls - minimalist style */
.carousel-control-prev,
.carousel-control-next {
  width: 50px;
  opacity: 0.7;
  transition: opacity 0.2s ease;
  border: none !important;
  background: none !important;
  box-shadow: none !important;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
  opacity: 1;
  background-color: rgba(0, 0, 0, 0.05) !important;
  border: none !important;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
  width: auto;
  height: auto;
  background-image: none;
  font-size: 2rem;
  font-weight: 300;
  color: var(--color-text);
}

.carousel-control-prev-icon::before {
  content: "‹";
}

.carousel-control-next-icon::before {
  content: "›";
}

/* Carousel indicators - minimalist style */
.carousel-indicators {
  position: relative;
  bottom: auto;
  margin-top: var(--spacing-md);
  margin-bottom: 0;
}

.carousel-indicators [data-bs-target] {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-border);
  border: none;
  opacity: 1;
  margin: 0 4px;
  transition: all 0.2s ease;
}

.carousel-indicators [data-bs-target].active {
  background-color: var(--color-accent) !important;
  width: 10px;
  height: 10px;
}

.carousel-indicators [data-bs-target]:hover {
  background-color: var(--color-muted);
}

/* Image modal overlay */
.image-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  z-index: 9999;
  cursor: pointer;
}

.image-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-modal img {
  max-width: 95%;
  max-height: 95%;
  object-fit: contain;
  cursor: default;
}

.image-modal .close-modal {
  position: absolute;
  top: 20px;
  right: 40px;
  font-size: 3rem;
  color: #fff;
  cursor: pointer;
  font-weight: 300;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.image-modal .close-modal:hover {
  opacity: 1;
}

dl {
  margin: var(--spacing-lg) 0;
}

dt {
  font-weight: bold;
  margin-top: var(--spacing-md);
}

dt:first-child {
  margin-top: 0;
}

dd {
  margin: 0;
  margin-bottom: var(--spacing-sm);
}

/* Private information section with background */
.private-info {
  background-color: #f5f5f5;
  border-left: 3px solid var(--color-border);
}

.private-info dl {
  margin: 0;
}

.private-info dt:first-child {
  margin-top: 0;
}

/* Book content (descriptions, notes, sidebar, list items) uses serif font like titles */
.book-content,
.wiki-content,
.col-lg-4 dl,
.book-item-text {
  font-family: var(--font-family-serif);
  font-size: 1.05rem;
  line-height: 1.6;
}

.col-lg-4 h5 {
  font-family: var(--font-family-serif);
}

/* ============================================
   10. PAGINATION
   ============================================ */
.pagination {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  list-style: none;
}

.pagination .page-item {
  display: inline;
}

.pagination .page-link {
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  background: #fff;
  border: 2px solid var(--color-text);
  color: var(--color-text);
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.2s ease;
  display: inline-block;
}

.pagination .page-link:hover {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
  text-decoration: none;
}

.pagination .page-item.active .page-link {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
  text-decoration: none;
}

/* ============================================
   11. MESSAGES & ALERTS
   ============================================ */
.messages {
  margin-bottom: var(--spacing-lg);
}

.alert {
  padding: var(--spacing-md);
  border-left: 3px solid var(--color-accent);
  background: #f5f3ff;
  margin-bottom: var(--spacing-md);
  border-radius: 0;
}

.alert-success,
.alert-info,
.alert-warning,
.alert-danger {
  background: none;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

/* ============================================
   12. TABLES
   ============================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
}

th, td {
  text-align: left;
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: bold;
}

thead th {
  border-bottom: 2px solid var(--color-border);
}

/* ============================================
   13. BOOTSTRAP OVERRIDES
   ============================================ */
/* Neutralize Bootstrap cards */
.card {
  border: none;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
}

.card-header,
.card-footer {
  background: transparent;
  border: none;
}

.card-body {
  padding: 0;
}

.card-title {
  font-weight: normal;
}

.card-text {
  color: var(--color-text);
}

/* Neutralize Bootstrap badges */
.badge {
  background: none;
  color: inherit;
  font-weight: normal;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

.badge.bg-primary,
.badge.bg-secondary,
.badge.bg-success,
.badge.bg-danger,
.badge.bg-warning,
.badge.bg-info {
  background: none;
  color: var(--color-text);
}

/* Tag-style badges with remove button */
#selected-categories .badge,
#selected-conditions .badge,
#selected-categories-form .badge {
  background: #f0f0f0;
  color: var(--color-text);
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
}

#selected-categories .badge .btn-close,
#selected-conditions .badge .btn-close,
#selected-categories-form .badge .btn-close {
  font-size: 0.6rem;
  opacity: 0.5;
}

#selected-categories .badge .btn-close:hover,
#selected-conditions .badge .btn-close:hover,
#selected-categories-form .badge .btn-close:hover {
  opacity: 1;
}

/* Modal styling */
.modal-content {
  border: 2px solid var(--color-border);
  border-radius: 4px;
  box-shadow: none;
}

.modal-header {
  border-bottom: 2px solid var(--color-border);
  background: #fafafa;
}

.modal-footer {
  border-top: 1px solid var(--color-border);
  background: #fafafa;
}

.modal-title {
  font-family: var(--font-family-serif);
  font-weight: 600;
  color: var(--color-text);
}

.btn-close {
  opacity: 0.5;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  width: auto;
  height: auto;
}

.btn-close::before {
  content: "×";
  display: block;
}

.btn-close:hover {
  opacity: 1;
}

/* Neutralize navbar */
.navbar {
  background: transparent !important;
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
}

.navbar-brand {
  font-weight: normal;
  font-size: inherit;
  color: var(--color-link);
}

.navbar-dark,
.navbar-light {
  background: transparent !important;
}

.nav-link {
  color: var(--color-link);
  text-decoration: none;
}

.nav-link:hover {
  color: var(--color-link);
  text-decoration: underline;
}

/* Remove Bootstrap icons if any remain */
.bi::before {
  content: '';
  display: none;
}

/* Dropdown menus */
.dropdown-menu {
  border: 1px solid var(--color-border);
  border-radius: 0;
  box-shadow: none;
}

.dropdown-item {
  color: var(--color-text);
}

.dropdown-item:hover {
  background: var(--color-border);
}

/* ============================================
   14. UTILITY CLASSES
   ============================================ */
.text-center {
  text-align: center;
}

.text-end,
.text-md-end {
  text-align: right;
}

.d-flex {
  display: flex;
}

.d-inline {
  display: inline;
}

.d-inline-block {
  display: inline-block;
}

.d-block {
  display: block;
}

.d-none {
  display: none;
}

.justify-content-center {
  justify-content: center;
}

.justify-content-between {
  justify-content: space-between;
}

.align-items-center {
  align-items: center;
}

.flex-column {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-2 {
  gap: var(--spacing-sm);
}

.mb-0 { margin-bottom: 0; }
.mb-1, .mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3, .mb-4 { margin-bottom: var(--spacing-md); }
.mb-5 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1, .mt-2 { margin-top: var(--spacing-sm); }
.mt-3, .mt-4 { margin-top: var(--spacing-md); }
.mt-5 { margin-top: var(--spacing-lg); }

.me-1, .me-2 { margin-right: var(--spacing-sm); }
.ms-1, .ms-2 { margin-left: var(--spacing-sm); }

.p-0 { padding: 0; }
.p-1, .p-2 { padding: var(--spacing-sm); }
.p-3, .p-4 { padding: var(--spacing-md); }
.p-5 { padding: var(--spacing-lg); }

.py-1, .py-2 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-3, .py-4 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-5 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

/* ============================================
   15. RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --spacing-xxl: 2rem;
  }

  header nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .filter-sidebar {
    margin-bottom: var(--spacing-lg);
  }

  table {
    font-size: 0.875rem;
  }

  th, td {
    padding: var(--spacing-xs);
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 0.75rem;
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.125rem; }
}

/* ============================================
   16. PRINT STYLES
   ============================================ */
@media print {
  header nav,
  footer,
  .filter-sidebar,
  button,
  .btn {
    display: none;
  }

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

  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
}