/* Import JetBrains Mono */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Common tokens */
  --font-family: 'JetBrains Mono', monospace;
  --color-success: #66BB6A;
  --color-danger: #EF5350;
  --color-accent: #8B5E3C;
  --color-accent-hover: #A06D46;
  
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 40px;
  
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 12px;

  /* Dark Theme Variables (default) */
  --bg-color: #1C100A;          /* neutral (Espresso dark) */
  --surface-color: #3D2517;     /* surface (Rich Espresso) */
  --text-primary: #F5EBE0;      /* on-surface (Cream) */
  --text-secondary: #D5B99A;    /* secondary (Milky Coffee) */
  --border-color: #CBB29C;      /* border */
  --border-opacity: 0.3;
  --shadow-color: rgba(0, 0, 0, 0.6);
  --header-bg: #2C1A11;         /* dark header */
  --card-hover-bg: #4c3020;
  --badge-bg: #2C1A11;
  --badge-text: #EADBC8;
  --highlight-bg: rgba(139, 94, 60, 0.4);
  --scrollbar-track: #1C100A;
  --scrollbar-thumb: #8B5E3C;
}

body.light-theme {
  /* Light Theme Variables */
  --bg-color: #F5EBE0;          /* on-surface as light background */
  --surface-color: #FFFFFF;     /* white card backgrounds */
  --text-primary: #2C1A11;      /* primary (Dark Coffee) */
  --text-secondary: #8B5E3C;    /* accent as secondary text */
  --border-color: #CBB29C;      /* border */
  --border-opacity: 0.6;
  --shadow-color: rgba(44, 26, 17, 0.15);
  --header-bg: #EADBC8;         /* light cream header */
  --card-hover-bg: #F5EBE0;
  --badge-bg: #EADBC8;          /* cream badge */
  --badge-text: #2C1A11;
  --highlight-bg: rgba(213, 185, 154, 0.6);
  --scrollbar-track: #F5EBE0;
  --scrollbar-thumb: #CBB29C;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 0.95rem; /* body-md */
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-hover);
}

/* Main Container */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
header {
  background-color: var(--header-bg);
  border-bottom: 1px solid rgba(203, 178, 156, var(--border-opacity));
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px var(--shadow-color);
}

.header-title-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo-icon {
  font-size: 2.2rem;
  color: var(--color-accent);
  animation: pulse-glow 3s infinite ease-in-out;
}

@keyframes pulse-glow {
  0% { transform: scale(1); filter: drop-shadow(0 0 0px var(--color-accent)); }
  50% { transform: scale(1.05); filter: drop-shadow(0 0 8px var(--color-accent)); }
  100% { transform: scale(1); filter: drop-shadow(0 0 0px var(--color-accent)); }
}

.header-titles h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.header-titles p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Theme Switcher Toggle */
.theme-switch-container {
  display: flex;
  align-items: center;
  background-color: rgba(139, 94, 60, 0.15);
  border-radius: 30px;
  padding: 4px;
  border: 1px solid rgba(203, 178, 156, 0.3);
  position: relative;
  cursor: pointer;
  width: 90px;
  height: 38px;
  user-select: none;
}

.theme-switch-option {
  flex: 1;
  text-align: center;
  font-size: 0.9rem;
  z-index: 2;
  color: var(--text-secondary);
  transition: color 0.3s;
  display: flex;
  justify-content: center;
  align-items: center;
}

.theme-switch-option.active {
  color: var(--text-primary);
  font-weight: bold;
}

.theme-switch-slider {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 40px;
  height: 30px;
  background-color: var(--color-accent);
  border-radius: 20px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

body.light-theme .theme-switch-slider {
  transform: translateX(42px);
}

/* Layout Main Content */
main {
  flex: 1;
  padding: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Stats / Dashboard Panel */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.stat-card {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  box-shadow: 0 4px 10px var(--shadow-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--color-accent);
}

.stat-card.success::before {
  background-color: var(--color-success);
}

.stat-card.info::before {
  background-color: #42A5F5;
}

.stat-icon {
  font-size: 2rem;
  color: var(--color-accent);
  opacity: 0.8;
}

.stat-card.success .stat-icon {
  color: var(--color-success);
}

.stat-card.info .stat-icon {
  color: #42A5F5;
}

.stat-details h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.stat-details p {
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 2px;
}

/* Control Panel (Search, Filters, View toggle) */
.control-panel {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  box-shadow: 0 4px 10px var(--shadow-color);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.search-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}

.search-box-wrapper {
  position: relative;
  flex: 1;
  min-width: 280px;
}

.search-box-wrapper i {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
}

.search-input {
  width: 100%;
  padding: 12px var(--spacing-md) 12px 42px;
  background-color: var(--bg-color);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.95rem;
  outline: none;
}

.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 8px rgba(139, 94, 60, 0.4);
}

.filters-group {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.filter-btn {
  background-color: var(--bg-color);
  color: var(--text-secondary);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  border-radius: var(--radius-md);
  padding: 10px 18px;
  font-family: var(--font-family);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
}

.filter-btn:hover {
  background-color: rgba(139, 94, 60, 0.15);
  color: var(--text-primary);
}

.filter-btn.active {
  background-color: var(--color-accent);
  color: #F5EBE0;
  border-color: var(--color-accent);
}

.view-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-left: auto;
}

.view-toggle-btn {
  background-color: var(--bg-color);
  color: var(--text-secondary);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
}

.view-toggle-btn:hover, .view-toggle-btn.active {
  background-color: var(--color-accent);
  color: #F5EBE0;
  border-color: var(--color-accent);
}

/* Grid layout of Cards */
.columns-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 768px) {
  .columns-grid {
    grid-template-columns: 1fr;
  }
}

.col-card {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  box-shadow: 0 4px 10px var(--shadow-color);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.col-card:hover {
  transform: translateY(-4px);
  background-color: var(--card-hover-bg);
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(139, 94, 60, 0.25);
}

.card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.col-badge {
  background-color: var(--color-accent);
  color: #F5EBE0;
  font-size: 1.5rem;
  font-weight: 700;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 6px rgba(0,0,0,0.2);
}

.col-index-tag {
  background-color: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(203, 178, 156, 0.2);
}

.col-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.col-subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.col-subtitle.first-half {
  color: #66BB6A; /* Green for 1-e pivrichya */
}

.col-subtitle.second-half {
  color: #42A5F5; /* Blue for 2-e pivrichya */
}

.col-title-text {
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.4;
  word-break: break-word;
}

.card-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  border-top: 1px solid rgba(203, 178, 156, 0.15);
  padding-top: var(--spacing-sm);
  margin-top: auto;
}

.action-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.95rem;
  padding: 6px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.action-btn:hover {
  color: var(--color-accent-hover);
  background-color: rgba(139, 94, 60, 0.1);
}

/* Table View Layout */
.table-view-container {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  box-shadow: 0 4px 10px var(--shadow-color);
  overflow-x: auto;
}

table.columns-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 700px;
}

table.columns-table th, table.columns-table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid rgba(203, 178, 156, 0.15);
}

table.columns-table th {
  background-color: rgba(139, 94, 60, 0.08);
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

table.columns-table tr:hover {
  background-color: var(--card-hover-bg);
}

table.columns-table td.col-letter-cell {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-accent);
}

table.columns-table .table-action-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

table.columns-table .table-action-btn:hover {
  color: var(--color-accent-hover);
  background-color: rgba(139, 94, 60, 0.1);
}

/* Highlight Search Match */
mark.search-highlight {
  background-color: var(--highlight-bg);
  color: var(--text-primary);
  border-bottom: 1px solid var(--color-accent);
  padding: 0 2px;
  border-radius: 2px;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--text-secondary);
}

.empty-state i {
  font-size: 3.5rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  opacity: 0.7;
}

.empty-state h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  background-color: var(--color-accent);
  color: #F5EBE0;
  padding: 12px var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  background-color: var(--color-success);
}

/* Footer */
footer {
  text-align: center;
  padding: var(--spacing-lg);
  margin-top: auto;
  border-top: 1px solid rgba(203, 178, 156, var(--border-opacity));
  font-size: 0.8rem;
  color: var(--text-secondary);
  background-color: rgba(44, 26, 17, 0.2);
}

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

footer a:hover {
  text-decoration: underline;
}

/* Modal Popup for Details */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(203, 178, 156, var(--border-color));
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  width: 90%;
  max-width: 650px;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  transform: scale(0.85);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.show .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(203, 178, 156, 0.2);
  padding-bottom: var(--spacing-sm);
}

.modal-title-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.3rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close-btn:hover {
  background-color: rgba(239, 83, 80, 0.1);
  color: var(--color-danger);
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.modal-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.modal-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.modal-value {
  font-size: 1rem;
  line-height: 1.5;
  white-space: pre-line;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
  border-top: 1px solid rgba(203, 178, 156, 0.2);
  padding-top: var(--spacing-md);
}

.primary-btn {
  background-color: var(--color-accent);
  color: #F5EBE0;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
}

.primary-btn:hover {
  background-color: var(--color-accent-hover);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in-item {
  animation: fadeIn 0.4s ease forwards;
}

/* Responsiveness */
@media (max-width: 768px) {
  header {
    padding: var(--spacing-xs) var(--spacing-md);
    flex-direction: row;
    gap: var(--spacing-sm);
    justify-content: space-between;
    align-items: center;
  }
  
  .header-title-section {
    flex-direction: row;
    gap: var(--spacing-sm);
    align-items: center;
  }
  
  .logo-icon {
    font-size: 1.4rem;
  }
  
  .header-titles h1 {
    font-size: 0.95rem;
    line-height: 1.2;
  }
  
  .header-titles p {
    display: none;
  }
  
  .theme-switch-container {
    width: 70px;
    height: 30px;
    padding: 3px;
  }
  
  .theme-switch-slider {
    top: 3px;
    left: 3px;
    width: 30px;
    height: 22px;
  }
  
  body.light-theme .theme-switch-slider {
    transform: translateX(34px);
  }
  
  .search-filter-row {
    flex-direction: column;
    align-items: stretch;
  }
  
  .view-actions {
    margin-left: 0;
    justify-content: center;
  }
}

/* Instructions Styles */
.col-instruction-section {
  margin-top: var(--spacing-sm);
  background-color: rgba(139, 94, 60, 0.08);
  border-left: 3px solid var(--color-accent);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
}

.instruction-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 2px;
  letter-spacing: 0.03em;
}

.instruction-content {
  color: var(--text-primary);
  line-height: 1.4;
  font-size: 0.8rem;
}

body.light-theme .col-instruction-section {
  background-color: rgba(213, 185, 154, 0.25);
}

/* Pair Columns Layout for Grid View */
.columns-pair-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: stretch;
}

.col-card-empty-placeholder {
  visibility: hidden;
}

@media (max-width: 768px) {
  .columns-pair-row {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  .col-card-empty-placeholder {
    display: none;
  }
}

/* Letters Navigation Panel */
.letters-navigation-panel {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid rgba(203, 178, 156, var(--border-opacity));
  box-shadow: 0 4px 10px var(--shadow-color);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.letters-navigation-panel .nav-title {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.letters-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0;
}

.letter-nav-link {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  background-color: rgba(139, 94, 60, 0.1);
  border: 1px solid rgba(203, 178, 156, 0.25);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  user-select: none;
}

.letter-nav-link:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(139, 94, 60, 0.3);
}

.letter-nav-link:active {
  transform: translateY(0);
}

/* Highlight Flash Animation for targets */
@keyframes flash-animation {
  0% {
    background-color: rgba(139, 94, 60, 0.45);
    box-shadow: 0 0 15px var(--color-accent);
    transform: scale(1.015);
  }
  50% {
    background-color: rgba(139, 94, 60, 0.25);
    box-shadow: 0 0 10px var(--color-accent);
    transform: scale(1.008);
  }
  100% {
    background-color: var(--surface-color);
    box-shadow: 0 4px 10px var(--shadow-color);
    transform: scale(1);
  }
}

.col-card.highlight-flash {
  animation: flash-animation 1.5s ease-out;
}

@keyframes table-flash-animation {
  0% {
    background-color: rgba(139, 94, 60, 0.4);
  }
  100% {
    background-color: transparent;
  }
}

tr.highlight-flash {
  animation: table-flash-animation 1.5s ease-out;
}