/* Material Design 3 Color Tokens */
:root {
  --md-sys-color-background: #171217;
  --md-sys-color-on-background: #EADFE6;
  --md-sys-color-surface: #1F1A1F;
  --md-sys-color-on-surface: #EADFE6;
  --md-sys-color-surface-variant: #4A454E;
  --md-sys-color-on-surface-variant: #D0C3CC;
  --md-sys-color-primary: #C4D1C2;
  --md-sys-color-on-primary: #2A3529;
  --md-sys-color-primary-container: #3E4A3D;
  --md-sys-color-on-primary-container: #C4D1C2;
  --md-sys-color-outline: #998D96;
  --md-sys-color-outline-variant: #4A454E;
  --md-sys-color-error: #FFB4AB;
  
  /* Custom tag colors */
  --temporal-tag: #FFB3BA;
  --temporal-tag-container: #4A1E23;
  --on-temporal-tag: #2A0E11;
  --on-temporal-tag-container: #FFB3BA;
  
  --regional-tag: #BAFFC9;
  --regional-tag-container: #1E4A29;
  --on-regional-tag: #0E2A15;
  --on-regional-tag-container: #BAFFC9;
  
  --discipline-tag: #BAE1FF;
  --discipline-tag-container: #1E3A4A;
  --on-discipline-tag: #0E1E2A;
  --on-discipline-tag-container: #BAE1FF;
  
  --genre-fiction-tag: #FFDFBA;
  --genre-fiction-tag-container: #4A3A1E;
  --on-genre-fiction-tag: #2A1E0E;
  --on-genre-fiction-tag-container: #FFDFBA;
  
  --genre-nonfiction-tag: #E1BAFF;
  --genre-nonfiction-tag-container: #3A1E4A;
  --on-genre-nonfiction-tag: #1E0E2A;
  --on-genre-nonfiction-tag-container: #E1BAFF;
}

/* Base styles */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Roboto', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  line-height: 1.5;
}

/* Material Design Typography */
.md-typescale-headline-large {
  font-size: 2rem;
  font-weight: 400;
  line-height: 2.5rem;
}

.md-typescale-headline-medium {
  font-size: 1.75rem;
  font-weight: 400;
  line-height: 2.25rem;
}

.md-typescale-title-large {
  font-size: 1.375rem;
  font-weight: 400;
  line-height: 1.75rem;
}

.md-typescale-title-medium {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5rem;
}

.md-typescale-body-large {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5rem;
}

.md-typescale-body-medium {
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.25rem;
}

.md-typescale-body-small {
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1rem;
}

.md-typescale-label-large {
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25rem;
}

.md-typescale-label-medium {
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1rem;
}

.md-typescale-label-small {
  font-size: 0.6875rem;
  font-weight: 500;
  line-height: 1rem;
}

/* Layout components */
.md-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem;
}

.md-app-bar {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: sticky;
  top: 0;
  z-index: 100;
}

.md-header-content {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.md-header-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.md-header-content h1 {
  flex: 1;
  margin: 0;
}

.md-search-bar {
  display: flex;
  align-items: center;
  background-color: var(--md-sys-color-surface-variant);
  border-radius: 28px;
  padding: 0.5rem 1rem;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}

.md-search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--md-sys-color-on-surface);
  font-size: 1rem;
}

.md-search-input::placeholder {
  color: var(--md-sys-color-on-surface-variant);
}

.md-icon-button {
  background: none;
  border: none;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
}

.md-icon-button:hover {
  background-color: var(--md-sys-color-outline-variant);
}

/* Filter chips */
.md-filter-section {
  margin-bottom: 1rem;
}

.md-filter-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

/* Custom scrollbar styling */
.md-filter-row::-webkit-scrollbar {
  height: 6px;
}

.md-filter-row::-webkit-scrollbar-track {
  background: var(--md-sys-color-surface-variant);
  border-radius: 3px;
}

.md-filter-row::-webkit-scrollbar-thumb {
  background: var(--md-sys-color-outline);
  border-radius: 3px;
}

.md-filter-row::-webkit-scrollbar-thumb:hover {
  background: var(--md-sys-color-on-surface-variant);
}

/* Firefox scrollbar styling */
.md-filter-row {
  scrollbar-width: thin;
  scrollbar-color: var(--md-sys-color-outline) var(--md-sys-color-surface-variant);
}

.md-filter-label {
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  min-width: fit-content;
  margin-right: 0.5rem;
}

.md-filter-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.75rem;
  border-radius: 16px;
  border: 1px solid var(--md-sys-color-outline);
  background-color: transparent;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  font-size: 0.875rem;
  font-weight: 500;
}

.md-filter-chip:hover {
  background-color: var(--md-sys-color-outline-variant);
}

.md-filter-chip.selected {
  border-color: transparent;
}

/* Tag-specific colors */
.md-filter-chip.temporal {
  border-color: var(--temporal-tag);
  color: var(--temporal-tag);
}

.md-filter-chip.temporal.selected {
  background-color: var(--temporal-tag-container);
  color: var(--on-temporal-tag-container);
}

.md-filter-chip.regional {
  border-color: var(--regional-tag);
  color: var(--regional-tag);
}

.md-filter-chip.regional.selected {
  background-color: var(--regional-tag-container);
  color: var(--on-regional-tag-container);
}

.md-filter-chip.discipline {
  border-color: var(--discipline-tag);
  color: var(--discipline-tag);
}

.md-filter-chip.discipline.selected {
  background-color: var(--discipline-tag-container);
  color: var(--on-discipline-tag-container);
}

.md-filter-chip.genre-fiction {
  border-color: var(--genre-fiction-tag);
  color: var(--genre-fiction-tag);
}

.md-filter-chip.genre-fiction.selected {
  background-color: var(--genre-fiction-tag-container);
  color: var(--on-genre-fiction-tag-container);
}

.md-filter-chip.genre-nonfiction {
  border-color: var(--genre-nonfiction-tag);
  color: var(--genre-nonfiction-tag);
}

.md-filter-chip.genre-nonfiction.selected {
  background-color: var(--genre-nonfiction-tag-container);
  color: var(--on-genre-nonfiction-tag-container);
}

/* Book cards */
.md-book-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.md-book-card {
  background-color: var(--md-sys-color-surface);
  border-radius: 12px;
  padding: 1rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  transition: all 0.2s ease;
  cursor: pointer;
}

.md-book-card:hover {
  border-color: var(--md-sys-color-outline);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.md-book-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.md-book-icon {
  width: 40px;
  height: 40px;
  background-color: var(--md-sys-color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-primary);
  flex-shrink: 0;
}

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

.md-book-title {
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  margin: 0 0 0.25rem 0;
}

.md-book-author {
  color: var(--md-sys-color-on-surface-variant);
  margin: 0 0 0.5rem 0;
}

.md-book-description {
  color: var(--md-sys-color-on-surface-variant);
  margin: 0.5rem 0;
  line-height: 1.4;
}

.md-book-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.md-tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid;
}

.md-tag-chip.temporal {
  background-color: var(--temporal-tag-container);
  color: var(--on-temporal-tag-container);
  border-color: var(--temporal-tag-container);
}

.md-tag-chip.regional {
  background-color: var(--regional-tag-container);
  color: var(--on-regional-tag-container);
  border-color: var(--regional-tag-container);
}

.md-tag-chip.discipline {
  background-color: var(--discipline-tag-container);
  color: var(--on-discipline-tag-container);
  border-color: var(--discipline-tag-container);
}

.md-tag-chip.genre-fiction {
  background-color: var(--genre-fiction-tag-container);
  color: var(--on-genre-fiction-tag-container);
  border-color: var(--genre-fiction-tag-container);
}

.md-tag-chip.genre-nonfiction {
  background-color: var(--genre-nonfiction-tag-container);
  color: var(--on-genre-nonfiction-tag-container);
  border-color: var(--genre-nonfiction-tag-container);
}

/* Utility classes */
.md-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  color: var(--md-sys-color-on-surface-variant);
}

.md-error {
  background-color: var(--md-sys-color-error);
  color: var(--md-sys-color-on-background);
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem 0;
}

.md-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0.75rem 0;
  color: var(--md-sys-color-on-surface-variant);
}

.md-clear-filters {
  background: none;
  border: none;
  color: var(--md-sys-color-primary);
  cursor: pointer;
  text-decoration: underline;
  font-size: 0.875rem;
}

.md-expand-button {
  background: none;
  border: none;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  margin-left: 0.5rem;
}

.md-expand-button:hover {
  background-color: var(--md-sys-color-outline-variant);
}

/* Responsive design */
@media (max-width: 768px) {
  .md-container {
    padding: 0.5rem;
  }
  
  .md-book-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .md-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

/* Modal styles */
.md-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.md-modal {
  background-color: var(--md-sys-color-surface);
  border-radius: 12px;
  max-width: 500px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.md-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.md-modal-header h2 {
  margin: 0;
  color: var(--md-sys-color-on-surface);
}

.md-modal-content {
  padding: 1.5rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

.md-modal-content p {
  margin: 0 0 1rem 0;
}

.md-modal-content p:last-child {
  margin-bottom: 0;
}

/* Hide/show content */
.hidden {
  display: none;
}

.collapsed {
  max-height: 3rem;
  overflow: hidden;
}