/* ============================================
   VOCAB MASTER 2.0 - MODERN CYBERPUNK
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700&family=Noto+Sans+Bengali:wght@400;500;600;700&display=swap');

:root {
  --bg-dark: #050508;
  --bg-card: rgba(20, 25, 40, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.03);
  
  --neon-cyan: #00f5ff;
  --neon-pink: #ff006e;
  --neon-green: #00ff88;
  --neon-purple: #b829dd;
  --neon-yellow: #ffd700;
  
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  
  --gradient-1: linear-gradient(135deg, #00f5ff 0%, #b829dd 100%);
  --gradient-2: linear-gradient(135deg, #ff006e 0%, #b829dd 100%);
  --gradient-3: linear-gradient(135deg, #00ff88 0%, #00f5ff 100%);
  
  --shadow-cyan: 0 0 20px rgba(0, 245, 255, 0.3);
  --shadow-pink: 0 0 20px rgba(255, 0, 110, 0.3);
  
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-bangla: 'Noto Sans Bengali', sans-serif;
  
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Animated Background */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
}

.bg-mesh::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 245, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 0, 110, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(184, 41, 221, 0.1) 0%, transparent 60%);
  animation: mesh-rotate 20s ease-in-out infinite;
}

@keyframes mesh-rotate {
  0%, 100% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.1); }
}

.grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 1;
}

/* Floating Orbs */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  z-index: 0;
  animation: float 15s ease-in-out infinite;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: var(--neon-cyan);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.orb-2 {
  width: 300px;
  height: 300px;
  background: var(--neon-pink);
  bottom: -50px;
  left: -50px;
  animation-delay: -5s;
}

.orb-3 {
  width: 250px;
  height: 250px;
  background: var(--neon-purple);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Container */
.container {
  position: relative;
  z-index: 10;
  max-width: 480px;
  margin: 0 auto;
  padding: 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================
   NAVIGATION - MODERN PILL DESIGN
   ============================================ */

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 0.5rem 0.8rem;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  gap: 0.3rem;
}

.nav-item {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: var(--radius-sm);
}

.nav-item span {
  position: relative;
  z-index: 1;
}

.nav-item:hover {
  color: var(--text-primary);
}

.nav-item.active {
  color: var(--bg-dark);
}

.nav-item.active::before {
  opacity: 1;
}

/* ============================================
   FILTER TABS
   ============================================ */

.filter-tabs {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.filter-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem;
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-tab:hover {
  border-color: rgba(0, 245, 255, 0.3);
  background: rgba(0, 245, 255, 0.05);
}

.filter-tab.active {
  background: rgba(0, 245, 255, 0.15);
  border-color: var(--neon-cyan);
  box-shadow: var(--shadow-cyan);
}

.filter-tab .icon {
  font-size: 1.2rem;
}

.filter-tab .text {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.filter-tab.active .text {
  color: var(--neon-cyan);
}

.filter-tab .badge {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
}

.filter-tab.active .badge {
  background: var(--neon-cyan);
  color: var(--bg-dark);
}

/* ============================================
   STATS BAR
   ============================================ */

.stats-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.2rem;
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 1.2rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neon-cyan);
}

.stat-value.learned {
  color: var(--neon-green);
}

.stat-divider {
  width: 1px;
  height: 30px;
  background: rgba(255, 255, 255, 0.1);
}

.status-badge {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  background: rgba(0, 245, 255, 0.15);
  color: var(--neon-cyan);
  border: 1px solid rgba(0, 245, 255, 0.3);
}

.status-badge.learned {
  background: rgba(0, 255, 136, 0.15);
  color: var(--neon-green);
  border-color: rgba(0, 255, 136, 0.3);
}

/* ============================================
   MAIN CARD
   ============================================ */

.main-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.main-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
}

.card-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 245, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.main-card:hover .card-glow {
  opacity: 1;
}

/* Word Display */
.word-section {
  text-align: center;
  padding: 1.5rem 0;
  position: relative;
  z-index: 1;
}

.word-main {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 8vw, 3rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 3px;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.8rem;
  word-break: break-all;
  line-height: 1.2;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-shadow: 0 0 30px rgba(0, 245, 255, 0.3);
}

.word-pos {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 0.5rem 1.2rem;
  background: rgba(255, 0, 110, 0.15);
  border: 1px solid rgba(255, 0, 110, 0.3);
  color: var(--neon-pink);
  border-radius: 30px;
  margin-bottom: 1rem;
}

.word-bangla {
  font-family: var(--font-bangla);
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 600;
  color: var(--neon-yellow);
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Info Sections */
.info-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
  flex: 1;
  overflow-y: auto;
}

.info-item {
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 1rem;
  transition: all 0.3s ease;
}

.info-item:hover {
  border-color: rgba(0, 245, 255, 0.2);
  background: rgba(0, 245, 255, 0.03);
}

.info-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.info-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan);
}

.info-dot.pink {
  background: var(--neon-pink);
  box-shadow: 0 0 10px var(--neon-pink);
}

.info-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.info-text {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.6;
  word-break: break-word;
}

.info-text.bangla {
  font-family: var(--font-bangla);
  font-size: 1rem;
}

/* Synonyms */
.synonyms-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.syn-tag {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.4rem 0.8rem;
  background: rgba(184, 41, 221, 0.15);
  border: 1px solid rgba(184, 41, 221, 0.3);
  color: var(--neon-purple);
  border-radius: 20px;
}

/* Controls */
.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: auto;
  padding-top: 1rem;
}

.nav-circle {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 2px solid rgba(0, 245, 255, 0.3);
  color: var(--neon-cyan);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.nav-circle:hover:not(:disabled) {
  background: var(--neon-cyan);
  color: var(--bg-dark);
  box-shadow: var(--shadow-cyan);
  transform: scale(1.1);
}

.nav-circle:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

.action-btn {
  flex: 1;
  max-width: 200px;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.action-btn.learn {
  background: var(--gradient-3);
  color: var(--bg-dark);
  box-shadow: 0 4px 15px rgba(0, 255, 136, 0.3);
}

.action-btn.learn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 255, 136, 0.4);
}

.action-btn.unlearn {
  background: var(--gradient-2);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 0, 110, 0.3);
}

.action-btn.unlearn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 0, 110, 0.4);
}

/* ============================================
   EXAM STYLES
   ============================================ */

.exam-mode-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.mode-option {
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.mode-option::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mode-option:hover {
  border-color: var(--neon-cyan);
  transform: translateY(-3px);
}

.mode-option:hover::before {
  opacity: 0.1;
}

.mode-content {
  position: relative;
  z-index: 1;
}

.mode-icon-large {
  font-size: 2.5rem;
  margin-bottom: 0.8rem;
}

.mode-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

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

/* Quiz Card */
.quiz-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
}

.quiz-progress {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.quiz-progress span {
  color: var(--neon-cyan);
  font-size: 1.2rem;
  font-weight: 700;
}

.quiz-word-display {
  font-family: var(--font-display);
  font-size: clamp(2rem, 10vw, 3.5rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-primary);
  margin-bottom: 2rem;
  text-shadow: 0 0 30px rgba(0, 245, 255, 0.3);
  word-break: break-all;
  line-height: 1.2;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.option-card {
  padding: 1.2rem;
  background: var(--bg-glass);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  font-family: var(--font-bangla);
  font-size: 1.1rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.option-card:hover:not(.disabled) {
  border-color: var(--neon-cyan);
  background: rgba(0, 245, 255, 0.05);
  transform: translateX(5px);
}

.option-card.correct {
  background: rgba(0, 255, 136, 0.15);
  border-color: var(--neon-green);
  color: var(--neon-green);
  animation: pulse-green 0.5s ease;
}

.option-card.wrong {
  background: rgba(255, 0, 110, 0.15);
  border-color: var(--neon-pink);
  color: var(--neon-pink);
  animation: shake 0.5s ease;
}

.option-card.reveal {
  background: rgba(0, 255, 136, 0.1);
  border-color: var(--neon-green);
  color: var(--neon-green);
}

.option-card.disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

@keyframes pulse-green {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

.feedback-msg {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
}

.feedback-msg.show {
  opacity: 1;
  transform: translateY(0);
}

.feedback-msg.correct {
  background: rgba(0, 255, 136, 0.15);
  color: var(--neon-green);
  border: 1px solid rgba(0, 255, 136, 0.3);
}

.feedback-msg.wrong {
  background: rgba(255, 0, 110, 0.15);
  color: var(--neon-pink);
  border: 1px solid rgba(255, 0, 110, 0.3);
}

.next-btn-large {
  width: 100%;
  margin-top: 1rem;
  padding: 1.2rem;
  background: var(--gradient-1);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--bg-dark);
  cursor: pointer;
  transition: all 0.3s ease;
}

.next-btn-large:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-cyan);
}

/* Results */
.results-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
}

.score-ring {
  width: 160px;
  height: 160px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  background: conic-gradient(var(--neon-cyan) var(--score-percent), rgba(255,255,255,0.1) 0);
  padding: 8px;
}

.score-ring::before {
  content: '';
  position: absolute;
  inset: 8px;
  background: var(--bg-card);
  border-radius: 50%;
}

.score-content {
  position: relative;
  z-index: 1;
}

.score-value {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.score-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

.result-stat {
  background: var(--bg-glass);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.result-stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.result-stat-value.correct { color: var(--neon-green); }
.result-stat-value.wrong { color: var(--neon-pink); }
.result-stat-value.total { color: var(--neon-cyan); }

.result-stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-message {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.wrong-words-box {
  background: rgba(255, 0, 110, 0.1);
  border: 1px solid rgba(255, 0, 110, 0.2);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: 1.5rem;
  max-height: 200px;
  overflow-y: auto;
}

.wrong-words-title {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--neon-pink);
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.wrong-word-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  margin-bottom: 0.5rem;
}

.wrong-word-en {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--neon-pink);
  text-transform: uppercase;
}

.wrong-word-bn {
  font-family: var(--font-bangla);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.result-actions {
  display: flex;
  gap: 1rem;
}

.result-btn {
  flex: 1;
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.result-btn.primary {
  background: var(--gradient-1);
  color: var(--bg-dark);
}

.result-btn.secondary {
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

.result-btn:hover {
  transform: translateY(-2px);
}

/* ============================================
   HOME PAGE
   ============================================ */

.hero-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 0;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 12vw, 4rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 5px;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  animation: title-glow 3s ease-in-out infinite;
}

@keyframes title-glow {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.2); }
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  letter-spacing: 1px;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-bottom: 3rem;
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--neon-cyan);
  text-shadow: var(--shadow-cyan);
}

.hero-stat-value.learned {
  color: var(--neon-green);
  text-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 0.3rem;
}

.hero-actions {
  display: grid;
  gap: 1rem;
  width: 100%;
  max-width: 320px;
}

.hero-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.5rem;
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.hero-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.hero-btn.learn::before {
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.1), transparent);
}

.hero-btn.exam::before {
  background: linear-gradient(135deg, rgba(255, 0, 110, 0.1), transparent);
}

.hero-btn:hover::before {
  opacity: 1;
}

.hero-btn:hover {
  border-color: var(--neon-cyan);
  transform: translateX(5px);
}

.hero-btn-icon {
  font-size: 2rem;
}

.hero-btn-content {
  text-align: left;
}

.hero-btn-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.2rem;
}

.hero-btn.learn .hero-btn-title {
  color: var(--neon-green);
}

.hero-btn.exam .hero-btn-title {
  color: var(--neon-pink);
}

.hero-btn-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================
   MODAL
   ============================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal-sheet {
  background: var(--bg-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  width: 100%;
  max-width: 480px;
  max-height: 80vh;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.modal-overlay.show .modal-sheet {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.modal-close:hover {
  background: rgba(255, 0, 110, 0.2);
  color: var(--neon-pink);
  border-color: var(--neon-pink);
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}

.word-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.word-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
}

.word-item:hover {
  border-color: rgba(0, 245, 255, 0.3);
  background: rgba(0, 245, 255, 0.05);
}

.word-item.learned {
  border-color: rgba(0, 255, 136, 0.2);
  background: rgba(0, 255, 136, 0.05);
}

.word-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.word-en {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-primary);
}

.word-bn {
  font-family: var(--font-bangla);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.word-check {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 136, 0.15);
  color: var(--neon-green);
  font-size: 0.9rem;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Loading */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loading-screen.hide {
  opacity: 0;
  pointer-events: none;
}

.loader {
  width: 60px;
  height: 60px;
  border: 3px solid rgba(0, 245, 255, 0.1);
  border-top-color: var(--neon-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1.5rem;
}

.loading-text {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--neon-cyan);
  letter-spacing: 2px;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Utilities */
.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 245, 255, 0.3);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 245, 255, 0.5);
}