/* ==========================================================================
   SPELLING BEE PRACTICE APP - PREMIUM CSS DESIGN
   ========================================================================== */

/* Design Tokens & Custom Variables */
:root {
  --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Color Palette - Vibrant Dark Mode */
  --bg-primary: #080b11;
  --bg-secondary: #0e131f;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Neon Accents */
  --accent-cyan: hsl(190, 100%, 50%);
  --accent-cyan-rgb: 0, 242, 254;
  --accent-purple: hsl(265, 95%, 65%);
  --accent-purple-rgb: 157, 78, 221;
  --accent-orange: hsl(35, 100%, 50%);
  
  /* Context Colors */
  --color-easy: hsl(150, 80%, 42%);
  --color-easy-bg: rgba(16, 185, 129, 0.15);
  --color-intermediate: hsl(45, 95%, 50%);
  --color-intermediate-bg: rgba(245, 158, 11, 0.15);
  --color-hard: hsl(350, 90%, 60%);
  --color-hard-bg: rgba(239, 68, 68, 0.15);
  
  --color-success: hsl(142, 70%, 45%);
  --color-success-bg: rgba(34, 197, 94, 0.1);
  --color-danger: hsl(350, 80%, 55%);
  --color-danger-bg: rgba(239, 68, 68, 0.1);
  
  /* Glassmorphism Styles */
  --glass-bg: rgba(15, 23, 42, 0.55);
  --glass-border: rgba(255, 255, 255, 0.07);
  --glass-border-focus: rgba(0, 242, 254, 0.35);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  
  /* Dimensions */
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
}

/* Base Resets & Typography */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
}

/* Background Glowing Blurs */
.bg-blur {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  opacity: 0.3;
  pointer-events: none;
}

.bg-blur-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-cyan) 0%, transparent 70%);
  top: -150px;
  right: -100px;
}

.bg-blur-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
  bottom: -200px;
  left: -150px;
}

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

::-webkit-scrollbar-track {
  background: rgba(8, 11, 17, 0.5);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 242, 254, 0.4);
}

/* Core Container */
.app-container {
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 2rem;
}

/* ==========================================================================
   HEADER COMPONENT
   ========================================================================== */
.app-header {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 10;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.logo-area {
  display: flex;
  flex-direction: column;
}

.badge {
  display: inline-block;
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  background: linear-gradient(135deg, rgba(var(--accent-cyan-rgb), 0.15), rgba(var(--accent-purple-rgb), 0.15));
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

#app-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Age selector toggle style in header */
.age-selector-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--glass-border);
  padding: 0.25rem;
  border-radius: var(--border-radius-md);
  backdrop-filter: blur(8px);
}

.age-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-left: 0.5rem;
}

.age-toggle-group {
  display: flex;
  gap: 0.25rem;
}

.age-btn {
  padding: 0.45rem 1rem;
  background: transparent;
  border: none;
  font-family: var(--font-primary);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: calc(var(--border-radius-md) - 4px);
  transition: all var(--transition-fast);
}

.age-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.age-btn.active {
  background: var(--text-primary);
  color: var(--bg-primary);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Primary Tab Navigation */
.app-nav {
  display: flex;
  padding: 0.35rem;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
  border-radius: var(--border-radius-md);
  align-self: flex-start;
  gap: 0.25rem;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border-radius: calc(var(--border-radius-md) - 4px);
  transition: all var(--transition-fast);
}

.nav-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.nav-tab.active {
  color: var(--bg-primary);
  background: var(--text-primary);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.tab-icon {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   LAYOUT SECTIONS
   ========================================================================== */
.app-content {
  flex: 1;
}

.tab-content {
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.tab-content.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* Card Container Styles */
.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: var(--glass-shadow);
  padding: 2rem;
  transition: transform var(--transition-normal), border var(--transition-normal);
}

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  border-radius: var(--border-radius-sm);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
  color: var(--bg-primary);
  border: none;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-tertiary {
  background: transparent;
  border: 1px dashed var(--glass-border);
  color: var(--text-secondary);
}

.btn-tertiary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: rgba(var(--accent-cyan-rgb), 0.05);
}

.btn-success {
  background: var(--color-success);
  color: var(--text-primary);
}

.btn-success:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

.btn-danger {
  background: var(--color-danger);
  color: var(--text-primary);
}

.btn-danger:hover {
  filter: brightness(1.1);
}

.text-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.text-btn:hover {
  color: var(--accent-cyan);
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  color: var(--accent-cyan);
  background: rgba(var(--accent-cyan-rgb), 0.1);
  border-color: var(--accent-cyan);
  transform: scale(1.05);
}

.icon {
  width: 20px;
  height: 20px;
}

.btn-icon {
  width: 16px;
  height: 16px;
}

.btn-icon-right {
  width: 16px;
  height: 16px;
}

.inline-icon {
  width: 14px;
  height: 14px;
  display: inline;
  vertical-align: middle;
  margin: 0 2px;
}

.w-full {
  width: 100%;
}

/* ==========================================================================
   TAB 1: WORD EXPLORER VIEW
   ========================================================================== */
.search-and-filters {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .search-and-filters {
    grid-template-columns: 1.2fr 1.8fr;
    align-items: center;
  }
}

/* Search Box styling */
.search-box {
  position: relative;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

#word-search {
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 2.75rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

#word-search:focus {
  border-color: var(--accent-cyan);
  background: rgba(15, 23, 42, 0.8);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.clear-btn {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.35rem;
  cursor: pointer;
}

.clear-btn:hover {
  color: var(--text-primary);
}

/* Difficulty Filters */
.filter-tabs {
  display: flex;
  overflow-x: auto;
  gap: 0.5rem;
  padding-bottom: 8px; /* for scrollbars */
  scrollbar-width: thin; /* Firefox */
}

.filter-tabs::-webkit-scrollbar {
  height: 4px;
}

.filter-tabs::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
}

.filter-tab {
  flex-shrink: 0;
  padding: 0.75rem 1.1rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--glass-border);
  background: rgba(15, 23, 42, 0.4);
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

/* Active states matching specific filters */
.filter-tab.active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.3);
}

/* Custom colors for special categories when active */
.filter-tab.active[data-filter="easy"] {
  background: var(--color-easy-bg);
  color: var(--color-easy);
  border-color: var(--color-easy);
}

.filter-tab.active[data-filter="intermediate"] {
  background: var(--color-intermediate-bg);
  color: var(--color-intermediate);
  border-color: var(--color-intermediate);
}

.filter-tab.active[data-filter="hard"] {
  background: var(--color-hard-bg);
  color: var(--color-hard);
  border-color: var(--color-hard);
}

.filter-tab.active:not([data-filter="all"]):not([data-filter="easy"]):not([data-filter="intermediate"]):not([data-filter="hard"]) {
  background: rgba(var(--accent-purple-rgb), 0.15);
  color: var(--accent-purple);
  border-color: var(--accent-purple);
}

/* Results metadata */
.results-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 0.5rem;
}

.keyboard-hint {
  display: none;
}

@media (min-width: 600px) {
  .keyboard-hint {
    display: inline-block;
    opacity: 0.8;
  }
}

/* Words Grid */
.words-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

/* Word Card Item */
.word-card {
  background: rgba(22, 28, 45, 0.45);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.word-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(22, 28, 45, 0.6);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.word-card-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.word-index {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
}

.word-spelling {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.word-card-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.speak-word-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid transparent;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.speak-word-btn:hover {
  background: rgba(var(--accent-cyan-rgb), 0.15);
  color: var(--accent-cyan);
  transform: scale(1.1);
}

/* Indicator Stripe on the left edge */
.word-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}

/* Different color markers based on sub categories */
.word-card.difficulty-easy::before {
  background: var(--color-easy);
}
.word-card.difficulty-intermediate::before {
  background: var(--color-intermediate);
}
.word-card.difficulty-hard::before {
  background: var(--color-hard);
}
.word-card.topic-word::before {
  background: var(--accent-purple);
}

/* Empty search state */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-secondary);
}

.empty-icon {
  width: 64px;
  height: 64px;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.empty-state h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

/* ==========================================================================
   TAB 2: PRACTICE VIEW (INTERACTIVE MODE)
   ========================================================================== */
.practice-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 992px) {
  .practice-layout {
    grid-template-columns: 1.8fr 1.2fr;
  }
}

.practice-card {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  overflow: hidden;
}

/* Top bar of practice card */
.practice-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1.25rem;
}

.difficulty-picker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.difficulty-picker .label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.difficulty-toggle-group {
  display: flex;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--glass-border);
  padding: 0.2rem;
  border-radius: var(--border-radius-sm);
}

.difficulty-btn {
  padding: 0.35rem 0.75rem;
  font-family: var(--font-primary);
  font-size: 0.75rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: calc(var(--border-radius-sm) - 2px);
  transition: all var(--transition-fast);
}

.difficulty-btn.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

/* Dynamic dropdown styles for Category C in practice */
.select-wrapper-sm {
  position: relative;
  display: inline-block;
}

.select-wrapper-sm::after {
  content: '▼';
  font-size: 0.55rem;
  color: var(--text-secondary);
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

#practice-topic-select {
  appearance: none;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 0.4rem 2rem 0.4rem 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.8rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

#practice-topic-select:focus {
  border-color: var(--accent-cyan);
}

/* Badges for active word */
.difficulty-badge {
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  letter-spacing: 0.05em;
}

.difficulty-badge.easy {
  color: var(--color-easy);
  background: var(--color-easy-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.difficulty-badge.intermediate {
  color: var(--color-intermediate);
  background: var(--color-intermediate-bg);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.difficulty-badge.hard {
  color: var(--color-hard);
  background: var(--color-hard-bg);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.difficulty-badge.topic {
  color: var(--accent-purple);
  background: rgba(var(--accent-purple-rgb), 0.15);
  border: 1px solid rgba(var(--accent-purple-rgb), 0.3);
}

/* Center area: audio click buttons */
.speaker-action-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 0;
}

.big-pulse-btn {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
  border: none;
  color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 0 30px rgba(0, 242, 254, 0.25);
  transition: transform var(--transition-spring), box-shadow var(--transition-normal);
  position: relative;
}

.big-pulse-btn::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--accent-cyan);
  top: 0;
  left: 0;
  opacity: 0;
  animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.big-pulse-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 0 40px rgba(0, 242, 254, 0.5);
}

.big-pulse-btn:active {
  transform: scale(0.96);
}

.big-pulse-btn.speaking::after {
  opacity: 1;
}

.play-icon {
  width: 38px;
  height: 38px;
  margin-left: 2px; /* Visual centering adjustment for play triangles */
}

.audio-controls-row {
  margin-top: 0.5rem;
}

.action-caption {
  font-size: 0.85rem;
  color: var(--text-muted);
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.95);
    opacity: 0.8;
  }
  50% {
    opacity: 0.3;
  }
  100% {
    transform: scale(1.35);
    opacity: 0;
  }
}

/* Spelling Input Field Form */
.spelling-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.input-wrapper {
  display: flex;
  gap: 0.75rem;
}

#spelling-input {
  flex: 1;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1rem 1.25rem;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  outline: none;
  transition: all var(--transition-fast);
}

#spelling-input:focus {
  border-color: var(--accent-cyan);
  background: rgba(15, 23, 42, 0.8);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
}

#spelling-input::placeholder {
  letter-spacing: normal;
  font-size: 1.05rem;
  font-weight: 400;
}

#spelling-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Clues controls row */
.clues-actions {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.clues-actions .btn {
  flex: 1;
  min-width: 130px;
}

/* Visual Blueprint spaces for letters */
.spelling-blueprint {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding: 0.5rem;
}

.blueprint-char {
  width: 28px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 700;
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
  color: var(--accent-cyan);
  transition: border var(--transition-fast);
  text-transform: uppercase;
}

.blueprint-char.revealed {
  border-bottom-color: var(--accent-purple);
  animation: reveal-pop 0.3s var(--transition-spring);
}

@keyframes reveal-pop {
  0% { transform: scale(0.6); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* Feedback Response Card View */
.feedback-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem;
  border-radius: var(--border-radius-md);
  margin-top: 0.5rem;
  animation: feedback-slide-in 0.4s var(--transition-spring);
}

.feedback-panel.success {
  background: var(--color-success-bg);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.feedback-panel.danger {
  background: var(--color-danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.feedback-content {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.feedback-icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  flex-shrink: 0;
}

.feedback-panel.success .feedback-icon-box {
  background: rgba(34, 197, 94, 0.2);
  color: var(--color-success);
}

.feedback-panel.danger .feedback-icon-box {
  background: rgba(239, 68, 68, 0.2);
  color: var(--color-danger);
}

.feedback-text-box h3 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.feedback-details {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.spelling-breakdown {
  font-family: monospace;
  font-size: 1.05rem;
  margin-top: 0.25rem;
}

.correct-reveal {
  color: var(--color-success);
  font-weight: 700;
}

.wrong-guess {
  color: var(--color-danger);
  text-decoration: line-through;
}

@keyframes feedback-slide-in {
  0% { opacity: 0; transform: translateY(15px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* Sidebar Elements (Stats & History) */
.practice-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Stats dashboard */
.stats-card h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 0.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.stat-box {
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--glass-border);
  padding: 1rem 0.5rem;
  border-radius: var(--border-radius-md);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-box.highlight {
  border-color: rgba(255, 153, 0, 0.3);
  background: rgba(255, 153, 0, 0.05);
}

.stat-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.stat-box.highlight .stat-val {
  color: var(--accent-orange);
  text-shadow: 0 0 10px rgba(255, 153, 0, 0.2);
}

.stat-lbl {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* Custom progress bar */
.progress-bar-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.progress-track {
  height: 8px;
  background: rgba(15, 23, 42, 0.6);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 10px;
  width: 0%;
  transition: width var(--transition-normal);
}

/* History Card list */
.card-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 0.5rem;
}

.card-header-flex h2 {
  font-size: 1.25rem;
  font-weight: 700;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 2px;
}

.history-empty {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  padding: 2rem 0;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  background: rgba(15, 23, 42, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  font-size: 0.85rem;
  animation: list-slide-in 0.3s var(--transition-spring);
}

.history-item-word {
  font-weight: 600;
}

.history-item-result {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
}

.history-item-result.success {
  color: var(--color-easy);
}

.history-item-result.danger {
  color: var(--color-danger);
}

@keyframes list-slide-in {
  0% { transform: translateX(10px); opacity: 0; }
  100% { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   SETTINGS DRAWER MODAL COMPONENT
   ========================================================================== */
.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(3, 7, 18, 0.7);
  backdrop-filter: blur(8px);
  z-index: 99;
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

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

.drawer {
  width: 100%;
  max-width: 400px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--glass-border);
  height: 100%;
  display: flex;
  flex-direction: column;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.drawer-overlay.active .drawer {
  transform: translateX(0);
}

.drawer-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-header h2 {
  font-size: 1.35rem;
  font-weight: 700;
}

.close-drawer-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.75rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background var(--transition-fast), color var(--transition-fast);
}

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

.drawer-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Config Layouts */
.config-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.config-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.field-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.mb-3 {
  margin-bottom: 0.75rem;
}

/* Beautiful custom select */
.select-wrapper {
  position: relative;
}

.select-wrapper::after {
  content: '▼';
  font-size: 0.65rem;
  color: var(--text-secondary);
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

#voice-select {
  width: 100%;
  appearance: none;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  transition: border var(--transition-fast);
}

#voice-select:focus {
  border-color: var(--accent-cyan);
}

/* Custom sliders */
.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-val {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

input[type="range"] {
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(15, 23, 42, 0.8);
  border-radius: 10px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-primary);
  cursor: pointer;
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.4);
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

.drawer-divider {
  border: none;
  border-top: 1px solid var(--glass-border);
  margin: 0.5rem 0;
}

.danger-zone {
  border: 1px solid rgba(239, 68, 68, 0.15);
  background: rgba(239, 68, 68, 0.02);
  padding: 1rem;
  border-radius: var(--border-radius-md);
}

.danger-zone h3 {
  font-size: 0.95rem;
  color: var(--color-hard);
  font-weight: 700;
}

/* ==========================================================================
   FOOTER SECTION
   ========================================================================== */
.app-footer {
  text-align: center;
  padding: 1.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   RESPONSIVE DESIGN CORRECTIONS
   ========================================================================== */
@media (max-width: 576px) {
  #app-title {
    font-size: 1.75rem;
  }
  
  .app-container {
    padding: 1rem;
    gap: 1.5rem;
  }
  
  .card {
    padding: 1.25rem;
  }
  
  .clues-actions {
    flex-direction: column;
  }
  
  .clues-actions .btn {
    width: 100%;
  }
  
  .input-wrapper {
    flex-direction: column;
  }
  
  #check-spelling-btn {
    width: 100%;
    margin-top: 0.25rem;
  }
  
  .age-selector-container {
    width: 100%;
    justify-content: space-between;
  }
}