/* Import Google Fonts: Outfit for English UI/labels, Noto Sans Kannada for Kannada text */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Kannada:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700&display=swap');

/* CSS Custom Properties for Modern Design System */
:root {
  --font-ui: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-kannada: 'Noto Sans Kannada', 'Segoe UI Kannada', sans-serif;

  /* Color Palette (Clean Warm Neutral with Violet/Indigo Accents) */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-color: #4f46e5;
  --accent-light: #e0e7ff;
  --accent-hover: #4338ca;
  --border-color: #e2e8f0;
  
  /* Drop shadow styles */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  
  /* Corners & Transitions */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  
  /* Default verse font size */
  --verse-font-size: 16px;
}

/* Reset and Core Layout */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-ui);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header & Glassmorphism */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  background: linear-gradient(135deg, var(--accent-color), #7c3aed);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.logo-section h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, var(--text-primary), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Controls Panel */
.controls-section {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.font-controls {
  display: flex;
  align-items: center;
  background-color: var(--bg-secondary);
  padding: 0.3rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  gap: 0.35rem;
}

.btn-ctrl {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.btn-ctrl:hover {
  color: var(--accent-color);
  background-color: var(--bg-tertiary);
}

.btn-ctrl:active {
  transform: scale(0.95);
}

.font-controls .btn-ctrl {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.font-controls .btn-ctrl:hover {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
  box-shadow: 0 2px 4px rgba(79, 70, 229, 0.2);
}

.font-size-badge {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-color);
  background-color: var(--accent-light);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  min-width: 54px;
  text-align: center;
  border: 1px solid rgba(79, 70, 229, 0.15);
  user-select: none;
}

/* Selectors Container */
.selectors-bar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 2rem;
  box-shadow: var(--shadow-sm);
}

.selectors-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1.25rem;
}

.select-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.select-wrapper label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.select-custom {
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.25rem;
  padding-right: 2.75rem;
}

.select-custom:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
  background-color: var(--bg-secondary);
}

.select-custom option {
  font-family: var(--font-ui);
  font-weight: normal;
  background-color: var(--bg-secondary);
}

/* Kannada language styling for book dropdown option */
.select-custom.kannada-font {
  font-family: var(--font-kannada);
}

/* Main Layout Grid */
main {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.reference-display {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.reference-title {
  font-family: var(--font-kannada);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.reference-english {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  background-color: var(--bg-tertiary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

/* Comparison Cards Grid */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  transition: all var(--transition-normal);
}

/* Adjust column layouts dynamically when cards count or screen size varies */
@media (min-width: 1024px) {
  .comparison-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  /* Centering the last 2 items if 5 items */
  .comparison-grid > *:nth-child(4) {
    grid-column: span 1;
  }
}

/* Card Styling */
.translation-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.translation-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-color);
  opacity: 0.75;
}

.translation-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(79, 70, 229, 0.2);
}

.translation-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.translation-label-kn {
  font-family: var(--font-kannada);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-color);
}

.translation-label-en {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  background-color: var(--bg-tertiary);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* Verse text with beautiful Kannada rendering */
.verse-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 80px;
}

.verse-text {
  font-family: var(--font-kannada);
  font-size: var(--verse-font-size);
  line-height: 1.8;
  color: var(--text-primary);
  word-break: break-word;
  transition: font-size var(--transition-fast) ease;
}

/* Custom placeholder for unavailable verse */
.verse-unavailable {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.verse-unavailable::before {
  content: '⚠️';
  font-style: normal;
}

/* Loading States / Skeletons */
.skeleton-card {
  height: 180px;
  position: relative;
}

.skeleton-card::before {
  display: none; /* remove accent bar on skeletons */
}

.skeleton-shine {
  animation: pulse-shine 1.5s infinite ease-in-out;
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    rgba(226, 232, 240, 0.6) 37%,
    var(--bg-tertiary) 63%
  );
  background-size: 400% 100%;
}

.skeleton-header-left {
  width: 50%;
  height: 1.25rem;
  border-radius: var(--radius-sm);
}

.skeleton-header-right {
  width: 20%;
  height: 1rem;
  border-radius: var(--radius-sm);
}

.skeleton-line {
  height: 1rem;
  margin-bottom: 0.75rem;
  border-radius: var(--radius-sm);
}

.skeleton-line-1 { width: 90%; }
.skeleton-line-2 { width: 95%; }
.skeleton-line-3 { width: 60%; }

@keyframes pulse-shine {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0 50%;
  }
}

/* Loading Spinner Overlay */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(248, 250, 252, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--accent-light);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-color);
}

/* Footer Section */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: auto;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Responsive Breakpoints */
@media (max-width: 1023px) {
  .comparison-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  header {
    padding: 0.75rem 1rem;
  }
  
  .header-container {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
  
  .controls-section {
    justify-content: space-between;
  }
  
  .selectors-bar {
    padding: 1rem;
  }
  
  .selectors-container {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  
  main {
    padding: 1rem;
    gap: 1rem;
  }
  
  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .translation-card {
    padding: 1.25rem;
  }
  
  .reference-display {
    align-items: center;
    gap: 0.5rem;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* ==========================================
   Dark Theme Overrides
   ========================================== */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-color: #818cf8;
  --accent-light: #312e81;
  --border-color: #334155;
}

[data-theme="dark"] header {
  background-color: rgba(30, 41, 59, 0.85);
  border-bottom-color: var(--border-color);
}

[data-theme="dark"] .select-custom {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23cbd5e1' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
}

[data-theme="dark"] .font-controls {
  background-color: var(--bg-tertiary);
}

/* ==========================================
   Navigation Buttons & Card Loaders
   ========================================== */
.nav-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  background-color: var(--accent-light);
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav-btn:active {
  transform: translateY(1px);
}

.card-loader {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100px;
}

.card-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--accent-light);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.85s linear infinite;
}