:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-arabic: 'Amiri', serif;
  
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  
  --brand-color: #0d9488;
  --brand-hover: #0f766e;
  --border-color: #e2e8f0;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  
  --brand-color: #14b8a6;
  --brand-hover: #2dd4bf;
  --border-color: #334155;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.logo-icon {
  color: var(--brand-color);
}

.nav-actions {
  display: flex;
  gap: 0.5rem;
}

.breadcrumb-container {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 1.5rem;
  font-size: 0.9rem;
}

.crumb {
  color: var(--brand-color);
  cursor: pointer;
}

.crumb.active {
  color: var(--text-secondary);
  cursor: default;
}

.crumb-separator {
  margin: 0 0.5rem;
  color: var(--text-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.btn:hover {
  background: var(--bg-hover);
}

.btn-icon {
  padding: 0.5rem;
}

.btn-back {
  margin-right: 0.75rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background-color: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
}

.btn-back:hover {
  border-color: var(--brand-color);
  color: var(--brand-color);
}

.search-container {
  position: relative;
  margin-bottom: 2rem;
}

.search-input {
  width: 100%;
  padding: 0.8rem 1rem 0.8rem 2.8rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-size: 1rem;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
}

.hidden {
  display: none !important;
}

.category-title {
  margin: 1.5rem 0 0.75rem 0;
  color: var(--brand-color);
}

.books-grid-category {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.book-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s;
}

.book-card:hover {
  transform: translateY(-2px);
  border-color: var(--brand-color);
}

.book-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.book-arabic {
  font-family: var(--font-arabic);
  color: var(--brand-color);
  font-size: 1.1rem;
}

.chapters-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
}

.chapter-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.chapter-item:hover {
  border-color: var(--brand-color);
}

.chapter-badge {
  background: var(--bg-hover);
  padding: 0.25rem 0.6rem;
  border-radius: 12px;
  font-size: 0.8rem;
}

.hadith-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-top {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.hadith-tag {
  background: var(--brand-color);
  color: white;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
}

.hadith-grade {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.arabic-text {
  font-family: var(--font-arabic);
  font-size: 1.4rem;
  line-height: 2.2;
  direction: rtl;
  margin-bottom: 1rem;
}

.english-text {
  margin-bottom: 1rem;
}

.reference-box {
  background: var(--bg-hover);
  padding: 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
}

/* Word Highlight for Search Matches */
mark.highlight-search {
  background-color: #fef08a;
  color: #854d0e;
  padding: 0 4px;
  border-radius: 4px;
  font-weight: 700;
}

[data-theme="dark"] mark.highlight-search {
  background-color: #854d0e;
  color: #fef08a;
}