/* ==========================================================================
   Poetic Verses - Premium CSS Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
  /* Harmonious Color Palette */
  --bg-gradient-start: #0a0813;
  --bg-gradient-end: #141125;
  --panel-bg: rgba(20, 17, 37, 0.6);
  --card-bg: rgba(30, 26, 54, 0.45);
  --card-hover-bg: rgba(41, 36, 73, 0.65);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);
  
  --text-primary: #f1f0f5;
  --text-secondary: #a9a6c2;
  --text-muted: #74718f;
  
  /* Vibrant Accent Gradients */
  --accent-primary: #8b5cf6;
  --accent-primary-gradient: linear-gradient(135deg, #a78bfa, #8b5cf6);
  --accent-secondary: #06b6d4;
  --accent-secondary-gradient: linear-gradient(135deg, #22d3ee, #06b6d4);
  --accent-active-gradient: linear-gradient(135deg, #f43f5e, #ec4899);
  
  --glow-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --card-shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.25);
  --hover-shadow: 0 12px 40px 0 rgba(139, 92, 246, 0.25);
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   Base Styles & Reset
   ========================================================================== */

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

body {
  font-family: 'Outfit', sans-serif;
  background: radial-gradient(circle at 50% 0%, #1e183a 0%, var(--bg-gradient-start) 50%, var(--bg-gradient-end) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  padding-bottom: 80px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-gradient-start);
}
::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ==========================================================================
   Header Section (Hero)
   ========================================================================== */

.hero-header {
  text-align: center;
  margin-bottom: 50px;
  position: relative;
}

.hero-logo {
  display: inline-block;
  font-family: 'Playfair Display', serif;
  font-size: 3.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff 0%, #a78bfa 50%, #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-weight: 300;
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   Dashboard Panel (Stats & Filters)
   ========================================================================== */

.dashboard-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 32px;
  margin-bottom: 40px;
  box-shadow: var(--glow-shadow);
}

/* Stats Block */
.stats-row {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 28px;
}

.stat-item {
  text-align: center;
  flex: 1;
  min-width: 150px;
}

.stat-val {
  font-family: 'Playfair Display', serif;
  font-size: 2.8rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #fff 30%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 4px;
}

/* Search and Sort Toolbar */
.toolbar {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

.search-input {
  width: 100%;
  padding: 16px 20px 16px 52px;
  background: rgba(10, 8, 19, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-smooth);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
  background: rgba(10, 8, 19, 0.8);
}

.search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: 1.2rem;
}

.sort-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sort-select {
  padding: 16px 24px;
  background: rgba(10, 8, 19, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  outline: none;
  transition: var(--transition-smooth);
}

.sort-select:focus, .sort-select:hover {
  border-color: var(--accent-primary);
}

/* Tag Cloud (Filters) */
.filter-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.filter-title {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
}

.clear-btn {
  font-size: 0.85rem;
  color: var(--accent-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  font-weight: 500;
  display: none; /* Shown dynamically via JS */
}

.clear-btn:hover {
  color: #22d3ee;
  text-decoration: underline;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.tag-chip {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: var(--transition-bounce);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tag-checkbox {
  accent-color: var(--accent-primary);
  width: 14px;
  height: 14px;
  cursor: pointer;
  border-radius: 4px;
  transition: var(--transition-smooth);
}

.tag-chip.active .tag-checkbox {
  accent-color: #fff;
}

.tag-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.tag-chip.active {
  background: var(--accent-primary-gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.tag-count {
  font-size: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-muted);
  padding: 2px 7px;
  border-radius: 10px;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.tag-chip:hover .tag-count {
  color: var(--text-secondary);
}

.tag-chip.active .tag-count {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

/* ==========================================================================
   Verses Container (Responsive Grid)
   ========================================================================== */

.verses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 28px;
  min-height: 200px;
  transition: var(--transition-smooth);
}

/* Empty State */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
  background: var(--panel-bg);
  border: 1px dashed var(--border-color);
  border-radius: 24px;
}

.empty-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.8rem;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

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

/* Verse Card Design */
.verse-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition-bounce);
}

/* Subtle corner gradient glowing on hover */
.verse-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 100% 0%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition-smooth);
  pointer-events: none;
}

.verse-card:hover {
  background: var(--card-hover-bg);
  border-color: var(--border-hover);
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--hover-shadow);
}

.verse-card:hover::before {
  opacity: 1;
}

/* Card Header (Card number and Copy button) */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.verse-number {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 1px;
}

.card-actions {
  display: flex;
  gap: 8px;
}

.action-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.action-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

/* Copy Animation Feedback */
.action-btn.copied {
  color: #34d399 !important;
  background: rgba(52, 211, 153, 0.15) !important;
}

/* Card Content (Verse text) */
.verse-text-content {
  font-family: 'Playfair Display', serif;
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: 24px;
  white-space: pre-line; /* Preserves newlines formatted in JSON */
  line-height: 1.6;
}

/* Card Footer (Author & Tag chips) */
.card-footer {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 18px;
}

.verse-author {
  font-size: 0.95rem;
  color: var(--accent-secondary);
  font-weight: 500;
  margin-bottom: 12px;
  display: inline-block;
}

.verse-author:empty::before {
  content: 'Neznámý autor';
  color: var(--text-muted);
  font-style: italic;
}

.verse-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.mini-tag {
  font-size: 0.75rem;
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.mini-tag:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.mini-tag.active {
  background: var(--accent-primary-gradient);
  border-color: transparent;
  color: #fff;
}

/* ==========================================================================
   Random Verse Panel (Bottom Floating Bar)
   ========================================================================== */

.random-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(30, 26, 54, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  padding: 8px 12px 8px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  z-index: 100;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  transition: var(--transition-bounce);
}

.random-bar:hover {
  transform: translateX(-50%) translateY(-2px);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 24px 60px rgba(139, 92, 246, 0.3);
}

.random-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.random-btn {
  background: var(--accent-active-gradient);
  border: none;
  border-radius: 40px;
  color: #fff;
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-bounce);
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.3);
  display: flex;
  align-items: center;
  gap: 8px;
}

.random-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(244, 63, 94, 0.5);
}

/* ==========================================================================
   Modal Dialogs (Random Verse Reveal)
   ========================================================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(6, 4, 12, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  padding: 20px;
}

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

.modal-content {
  background: radial-gradient(circle at 50% 0%, rgba(41, 36, 73, 0.95) 0%, rgba(20, 17, 37, 0.98) 100%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 32px;
  width: 100%;
  max-width: 650px;
  padding: 40px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.8), 0 0 100px rgba(139, 92, 246, 0.25);
  position: relative;
  transform: translateY(40px) scale(0.95);
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  right: 24px;
  top: 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.5rem;
  transition: var(--transition-smooth);
}

.modal-close:hover {
  color: #fff;
  transform: rotate(90deg);
}

.modal-header-tag {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-weight: 700;
  border-bottom: 2px solid var(--accent-secondary);
  padding-bottom: 4px;
}

.modal-verse-text {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-style: italic;
  line-height: 1.6;
  color: #fff;
  margin-bottom: 30px;
  white-space: pre-line;
  text-align: center;
}

.modal-verse-author {
  font-size: 1.1rem;
  color: var(--accent-secondary);
  text-align: center;
  font-weight: 500;
  margin-bottom: 30px;
}

.modal-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.modal-btn {
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
}

.modal-btn-primary {
  background: var(--accent-primary-gradient);
  border: none;
  color: #fff;
}

.modal-btn-primary:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.modal-btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.modal-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 900px) {
  .verses-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
  }
  .app-container {
    padding: 20px 16px;
  }
  .hero-logo {
    font-size: 2.8rem;
  }
}

@media (max-width: 600px) {
  .verses-grid {
    grid-template-columns: 1fr;
  }
  .hero-logo {
    font-size: 2.3rem;
  }
  .dashboard-panel {
    padding: 20px;
  }
  .stats-row {
    flex-direction: column;
    gap: 16px;
  }
  .stat-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    padding-bottom: 16px;
  }
  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .random-bar {
    width: calc(100% - 32px);
    border-radius: 20px;
    padding: 8px 12px 8px 16px;
    justify-content: space-between;
  }
  .random-text {
    display: none;
  }
  .random-btn {
    width: 100%;
    justify-content: center;
  }
  .modal-content {
    padding: 24px;
  }
  .modal-verse-text {
    font-size: 1.3rem;
  }
}