@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700&display=swap');

:root {
  --purple: #6C5CE7;
  --purple-dark: #5A4BD1;
  --yellow: #FDCB6E;
  --mint: #00CEC9;
  --mint-dark: #00B3AE;
  --coral: #FF7675;
  --white: #FFFFFF;
  --bg-light: #FFF9E6;
  --text-dark: #2D3436;
  --shadow: 0 8px 25px rgba(108, 92, 231, 0.15);
  --shadow-soft: 0 4px 15px rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: 'Nunito', sans-serif;
  background: linear-gradient(135deg, #FFF9E6 0%, #E8F8F5 100%);
  color: var(--text-dark);
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 0;
  overflow-x: hidden;
}

.app-container {
  max-width: 480px;
  margin: 0 auto;
  background: var(--white);
  min-height: 100vh;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.1);
  position: relative;
}

/* Screens */
.screen {
  display: none;
  flex-direction: column;
  min-height: 100vh;
  padding: 20px;
}

.screen.active {
  display: flex;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  margin-bottom: 20px;
}

.header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--purple);
}

.back-btn {
  background: var(--white);
  border: 2px solid #E0E0E0;
  color: var(--text-dark);
  padding: 8px 16px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.back-btn:hover {
  border-color: var(--purple);
  color: var(--purple);
}

/* Owl */
.owl-container {
  width: 200px;
  height: 200px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.owl-small {
  width: 80px;
  height: 80px;
}

/* Topics Grid */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.topic-card {
  background: linear-gradient(145deg, #FFFFFF, #F8F9FA);
  border-radius: 20px;
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow-soft);
  border: 3px solid transparent;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.topic-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow);
  border-color: var(--purple);
}

.topic-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-dark);
}

/* Buttons */
.primary-btn {
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: white;
  border: none;
  padding: 18px 32px;
  font-size: 18px;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  width: 100%;
  margin-top: 16px;
}

.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(108, 92, 231, 0.3);
}

.secondary-btn {
  background: transparent;
  color: var(--purple);
  border: 3px solid var(--purple);
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.secondary-btn:hover {
  background: var(--purple);
  color: white;
}

/* Practice */
.options-area {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.option-btn {
  background: var(--white);
  border: 3px solid #E0E0E0;
  padding: 20px 16px;
  border-radius: 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.option-btn:hover {
  border-color: var(--purple);
  transform: scale(1.02);
}

.option-btn.correct {
  background: #D4EDDA;
  border-color: #28A745;
  color: #155724;
  animation: pop 0.4s ease;
}

.option-btn.wrong {
  background: #F8D7DA;
  border-color: #DC3545;
  color: #721C24;
  animation: shake 0.4s ease;
}

@keyframes pop {
  0% { transform: scale(0.9); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

/* Feedback */
.feedback {
  display: none;
  padding: 16px 20px;
  border-radius: 16px;
  margin-top: 20px;
  font-weight: 600;
}

.feedback.show {
  display: block;
}

.feedback.correct {
  background: #D4EDDA;
  color: #155724;
  border: 2px solid #28A745;
}

.feedback.wrong {
  background: #F8D7DA;
  color: #721C24;
  border: 2px solid #DC3545;
}

/* Progress */
.progress-bar {
  width: 100%;
  height: 12px;
  background: #E9ECEF;
  border-radius: 999px;
  overflow: hidden;
  margin: 12px 0;
}

#progress-fill {
  height: 100%;
  background: linear-gradient(to right, var(--purple), var(--mint));
  width: 0%;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 999px;
}

/* Result */
.result-stats {
  display: flex;
  gap: 16px;
  margin: 24px 0;
}

.result-stats .stat {
  flex: 1;
  background: var(--bg-light);
  padding: 20px;
  border-radius: 16px;
  text-align: center;
}

/* Dashboard */
.dash-card {
  background: var(--white);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow-soft);
  margin-bottom: 20px;
}

#topic-progress-list .topic-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

#topic-progress-list .topic-row:last-child {
  margin-bottom: 0;
}

.dashboard-btn {
  background: linear-gradient(135deg, var(--mint), var(--mint-dark));
  color: white;
  border: none;
  padding: 14px 24px;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
}

/* Rule & Coach */
.rule-card {
  background: #FFF8E7;
  border-radius: 20px;
  padding: 24px;
  border: 3px solid #FFEAA7;
  margin-bottom: 20px;
}

.coach-says {
  background: var(--white);
  border: 3px solid var(--purple);
  border-radius: 20px;
  padding: 18px 22px;
  position: relative;
  margin: 16px 0;
  box-shadow: var(--shadow-soft);
}

.coach-says::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 30px;
  border: 12px solid transparent;
  border-top-color: var(--purple);
}

/* Voice Button */
.voice-btn {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 24px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease;
}

.voice-btn:active {
  transform: scale(0.9);
}

/* Age Select */
.age-select-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 40px 20px;
}

.age-card {
  width: 100%;
  padding: 32px 24px;
  border-radius: 24px;
  text-align: center;
  font-weight: 700;
  font-size: 20px;
  color: white;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.3s ease;
}

.age-card:hover {
  transform: scale(1.03);
}

.age-card.k2 { background: linear-gradient(135deg, #FDCB6E, #F39C12); }
.age-card.three5 { background: linear-gradient(135deg, #00CEC9, #00B894); }
.age-card.six8 { background: linear-gradient(135deg, #6C5CE7, #A55EEA); }

/* Footer Stats */
.footer-stats {
  display: flex;
  justify-content: space-around;
  padding: 20px 0;
  background: #F8F9FA;
  border-radius: 20px;
  margin-top: auto;
}

.footer-stats .stat {
  text-align: center;
}

/* Age card fixes */
.age-card {
  background: white;
  border-radius: 20px;
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  margin-bottom: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  transition: transform 0.2s, box-shadow 0.2s;
  border: 3px solid transparent;
}
.age-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.age-k2 { border-color: #FFB800; background: linear-gradient(135deg, #FFF8E1, #FFFDE7); }
.age-35 { border-color: #4CAF50; background: linear-gradient(135deg, #E8F5E9, #F1F8E9); }
.age-68 { border-color: #7C3AED; background: linear-gradient(135deg, #EDE9FE, #F5F3FF); }

.age-emoji { font-size: 3rem; margin-bottom: 8px; }
.age-label { font-size: 2rem; font-weight: 800; color: #1a1a2e; margin-bottom: 4px; }
.age-range { font-size: 1rem; font-weight: 700; color: #374151; margin-bottom: 8px; }
.age-topics { font-size: 0.85rem; color: #4B5563; font-weight: 600; }

.age-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 16px;
  width: 100%;
  max-width: 440px;
  margin: 0 auto;
}

.age-prompt {
  font-size: 1.1rem;
  font-weight: 700;
  color: #7C3AED;
  margin: 8px 0 20px;
}

.owl-emoji {
  font-size: 4rem;
  display: block;
  margin-bottom: 8px;
}

.home-actions {
  padding: 8px 16px;
  width: 100%;
  max-width: 440px;
}

.change-age-btn {
  background: none;
  border: 2px solid #7C3AED;
  color: #7C3AED;
  border-radius: 12px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  font-family: 'Nunito', sans-serif;
}