/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --brune-primary: #e85d75;
  --brune-secondary: #f8a4b8;
  --brune-bg: #fff0f3;
  --brune-accent: #c2185b;
  --brune-glow: rgba(232, 93, 117, 0.25);

  --olivia-primary: #6366f1;
  --olivia-secondary: #a5b4fc;
  --olivia-bg: #eef2ff;
  --olivia-accent: #4338ca;
  --olivia-glow: rgba(99, 102, 241, 0.25);

  --lezen-color: #0d9488;
  --lezen-bg: #ccfbf1;
  --lezen-glow: rgba(13, 148, 136, 0.15);
  --rekenen-color: #ea580c;
  --rekenen-bg: #fff7ed;
  --rekenen-glow: rgba(234, 88, 12, 0.15);

  --success: #16a34a;
  --success-bg: #dcfce7;
  --error: #dc2626;
  --error-bg: #fef2f2;
  --text: #1e293b;
  --text-light: #64748b;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --card-shadow: 0 4px 20px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --card-shadow-hover: 0 12px 40px rgba(0,0,0,0.1), 0 2px 6px rgba(0,0,0,0.06);
  --radius: 20px;
  --radius-sm: 14px;

  --primary: var(--brune-primary);
  --secondary: var(--brune-secondary);
  --player-bg: var(--brune-bg);
  --accent: var(--brune-accent);
  --glow: var(--brune-glow);
}

body {
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

body.player-olivia {
  --primary: var(--olivia-primary);
  --secondary: var(--olivia-secondary);
  --player-bg: var(--olivia-bg);
  --accent: var(--olivia-accent);
  --glow: var(--olivia-glow);
}

/* === Animated background blobs === */
#app {
  position: relative;
  min-height: 100dvh;
}

#bg-blobs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: blobFloat 20s ease-in-out infinite;
}

.blob-1 {
  width: 300px; height: 300px;
  background: var(--primary);
  top: -80px; left: -60px;
  animation-delay: 0s;
}
.blob-2 {
  width: 250px; height: 250px;
  background: var(--secondary);
  bottom: -60px; right: -40px;
  animation-delay: -7s;
  animation-duration: 25s;
}
.blob-3 {
  width: 200px; height: 200px;
  background: var(--accent);
  top: 50%; left: 60%;
  animation-delay: -14s;
  animation-duration: 22s;
}

@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -40px) scale(1.1); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(40px, 30px) scale(1.05); }
}

/* === Screens === */
.screen {
  display: none;
  min-height: 100dvh;
  animation: fadeIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  z-index: 1;
}
.screen.active {
  display: flex;
  flex-direction: column;
  align-items: center;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
  0% { transform: scale(0.7); opacity: 0; }
  60% { transform: scale(1.08); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes bounceIn {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.15); }
  70% { transform: scale(0.95); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-8px) rotate(-1deg); }
  30% { transform: translateX(8px) rotate(1deg); }
  45% { transform: translateX(-6px); }
  60% { transform: translateX(6px); }
  75% { transform: translateX(-3px); }
}

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

@keyframes correctFlash {
  0% { background: var(--success); color: #fff; border-radius: 16px; }
  100% { background: transparent; color: var(--text); }
}

@keyframes wrongFlash {
  0% { background: var(--error); color: #fff; border-radius: 16px; }
  100% { background: transparent; color: var(--text); }
}

@keyframes confettiFall {
  0% { transform: translateY(-10px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes scoreJump {
  0% { transform: scale(1); }
  40% { transform: scale(1.4); }
  100% { transform: scale(1); }
}

@keyframes streakGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 152, 0, 0.4); }
  50% { box-shadow: 0 0 12px 4px rgba(255, 152, 0, 0.2); }
}

@keyframes wordSlideIn {
  from { transform: translateX(40px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes timerUrgent {
  0%, 100% { color: var(--error); transform: scale(1); }
  50% { color: #b91c1c; transform: scale(1.12); }
}

/* === Confetti === */
.confetti-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 10px;
  top: -10px;
  animation: confettiFall linear forwards;
}

/* === Player Select === */
.player-select-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px;
  width: 100%;
  max-width: 520px;
}

.app-title {
  font-size: 2.6rem;
  font-weight: 900;
  text-align: center;
  background: linear-gradient(135deg, var(--brune-primary) 0%, #f59e0b 30%, var(--olivia-primary) 70%, #06b6d4 100%);
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 40px;
  font-weight: 700;
}

.player-cards {
  display: flex;
  gap: 20px;
  width: 100%;
}

.player-card {
  flex: 1;
  border: none;
  border-radius: 24px;
  padding: 32px 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s;
  box-shadow: var(--card-shadow);
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.player-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  opacity: 0;
  transition: opacity 0.3s;
}

.player-card:hover::before, .player-card:focus::before {
  opacity: 1;
}

.player-card:hover, .player-card:focus {
  transform: translateY(-6px) scale(1.03);
  box-shadow: var(--card-shadow-hover);
}

.player-card:active {
  transform: scale(0.96);
}

.player-brune {
  background: linear-gradient(160deg, #fff5f7, #ffffff, #fff0f3);
  border: 2px solid var(--brune-secondary);
}
.player-brune::before {
  background: radial-gradient(circle at 50% 120%, var(--brune-glow), transparent 70%);
}

.player-olivia {
  background: linear-gradient(160deg, #eef2ff, #ffffff, #e8eaf6);
  border: 2px solid var(--olivia-secondary);
}
.player-olivia::before {
  background: radial-gradient(circle at 50% 120%, var(--olivia-glow), transparent 70%);
}

.player-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: 900;
  color: #fff;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.player-brune .player-avatar {
  background: linear-gradient(135deg, #f472b6, var(--brune-accent));
}

.player-olivia .player-avatar {
  background: linear-gradient(135deg, #818cf8, var(--olivia-accent));
}

.player-name {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text);
  position: relative;
  z-index: 1;
}

.player-group {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(0,0,0,0.04);
  position: relative;
  z-index: 1;
}

/* === Menu === */
.menu-container, .sub-menu-container {
  width: 100%;
  max-width: 520px;
  padding: 24px;
}

.menu-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.menu-header h2 {
  flex: 1;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.greeting {
  flex: 1;
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.btn-back {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 2px solid #e2e8f0;
  background: var(--card-bg);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  font-family: inherit;
  color: var(--text);
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.btn-back:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--player-bg);
  transform: scale(1.05);
}

.streak-badge {
  display: none;
  padding: 8px 16px;
  border-radius: 24px;
  font-size: 0.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
  animation: streakGlow 2s ease-in-out infinite;
  letter-spacing: 0.01em;
}

.streak-badge.visible {
  display: block;
}

.stats-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.stat-chip {
  background: var(--player-bg);
  padding: 8px 16px;
  border-radius: 24px;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--primary);
  border: 1px solid var(--secondary);
}

.menu-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.menu-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px 28px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  box-shadow: var(--card-shadow);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  font-family: inherit;
  width: 100%;
  position: relative;
  overflow: hidden;
  background: var(--card-bg);
}

.menu-card::after {
  content: '';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0,0,0,0.04);
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-card:hover, .menu-card:focus {
  transform: translateY(-3px) scale(1.01);
  box-shadow: var(--card-shadow-hover);
}

.menu-card:active {
  transform: scale(0.98);
}

.card-lezen {
  background: linear-gradient(135deg, var(--lezen-bg) 0%, #ffffff 100%);
  border-left: 5px solid var(--lezen-color);
}
.card-lezen:hover {
  box-shadow: 0 8px 30px var(--lezen-glow), var(--card-shadow);
}

.card-rekenen {
  background: linear-gradient(135deg, var(--rekenen-bg) 0%, #ffffff 100%);
  border-left: 5px solid var(--rekenen-color);
}
.card-rekenen:hover {
  box-shadow: 0 8px 30px var(--rekenen-glow), var(--card-shadow);
}

.menu-card-icon {
  font-size: 2.4rem;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.menu-card-title {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--text);
}

.menu-card-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 600;
}

/* === Exercise List === */
.exercise-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exercise-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  background: var(--card-bg);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  font-family: inherit;
  width: 100%;
  border: 1px solid #f1f5f9;
}

.exercise-item:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
  border-color: var(--secondary);
}

.exercise-item:active {
  transform: scale(0.98);
}

.exercise-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.exercise-icon.lezen {
  background: linear-gradient(135deg, var(--lezen-color), #2dd4bf);
}

.exercise-icon.rekenen {
  background: linear-gradient(135deg, var(--rekenen-color), #fb923c);
}

.exercise-info-text {
  flex: 1;
  min-width: 0;
}

.exercise-item-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text);
}

.exercise-item-desc {
  font-size: 0.78rem;
  color: var(--text-light);
  font-weight: 600;
  margin-top: 1px;
}

.exercise-best {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--primary);
  background: var(--player-bg);
  padding: 5px 12px;
  border-radius: 16px;
  white-space: nowrap;
  flex-shrink: 0;
  border: 1px solid var(--secondary);
}

/* === Exercise Screens === */
.exercise-container {
  width: 100%;
  max-width: 520px;
  padding: 20px;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.exercise-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 2px solid #f1f5f9;
  margin-bottom: 16px;
}

.exercise-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.exercise-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.timer {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.timer.warning {
  animation: timerUrgent 0.6s ease infinite;
}

.score-display {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--success);
  min-width: 52px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.score-display.jump {
  animation: scoreJump 0.3s ease;
}

/* === Progress bar (under header during exercises) === */
.progress-bar-container {
  width: 100%;
  height: 6px;
  background: #f1f5f9;
  border-radius: 3px;
  margin-bottom: 8px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 1s linear;
}

/* === DMT === */
.dmt-word-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.dmt-instruction {
  text-align: center;
  padding: 32px 24px;
}

.dmt-instruction p {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 32px;
  line-height: 1.7;
  max-width: 340px;
}

.btn-start {
  padding: 18px 56px;
  font-size: 1.3rem;
  font-weight: 900;
  border: none;
  border-radius: 60px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 6px 24px var(--glow), 0 2px 8px rgba(0,0,0,0.1);
  font-family: inherit;
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}

.btn-start::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: shimmer 2s linear infinite;
  background-size: 200% 100%;
}

.btn-start:hover {
  transform: scale(1.06);
  box-shadow: 0 8px 32px var(--glow), 0 4px 12px rgba(0,0,0,0.12);
}

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

.dmt-active {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  width: 100%;
}

.word-display {
  font-size: 3.4rem;
  font-weight: 900;
  color: var(--text);
  text-align: center;
  padding: 32px 24px;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: wordSlideIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: -0.02em;
  border-radius: 20px;
  width: 100%;
}

.word-display.flash-correct {
  animation: correctFlash 0.35s ease;
}

.word-display.flash-wrong {
  animation: wrongFlash 0.35s ease, shake 0.4s ease;
}

.word-buttons {
  display: flex;
  gap: 16px;
  width: 100%;
  max-width: 380px;
}

.btn-word {
  flex: 1;
  padding: 20px;
  font-size: 1.1rem;
  font-weight: 800;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.btn-correct {
  background: var(--success-bg);
  color: var(--success);
  border-color: #bbf7d0;
}
.btn-correct:hover {
  background: #bbf7d0;
  border-color: var(--success);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(22, 163, 74, 0.15);
}
.btn-correct:active {
  transform: scale(0.95);
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}

.btn-wrong {
  background: var(--error-bg);
  color: var(--error);
  border-color: #fecaca;
}
.btn-wrong:hover {
  background: #fecaca;
  border-color: var(--error);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.15);
}
.btn-wrong:active {
  transform: scale(0.95);
  background: var(--error);
  color: #fff;
  border-color: var(--error);
}

/* === Keyboard hints === */
.keyboard-hint {
  font-size: 0.7rem;
  color: var(--text-light);
  text-align: center;
  margin-top: -8px;
  font-weight: 600;
  opacity: 0.7;
}

.key-badge {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  font-size: 0.65rem;
  background: #f8fafc;
  font-weight: 700;
  margin: 0 2px;
}

/* === Rekenen === */
.rekenen-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.rek-active {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  width: 100%;
}

.sum-display {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text);
  text-align: center;
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: wordSlideIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: -0.02em;
  padding: 16px;
  border-radius: 16px;
  width: 100%;
}

.answer-area {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 300px;
}

.answer-input {
  flex: 1;
  font-size: 2rem;
  font-weight: 900;
  text-align: center;
  border: 3px solid #e2e8f0;
  border-radius: var(--radius-sm);
  padding: 14px;
  outline: none;
  font-family: inherit;
  transition: all 0.2s;
  -moz-appearance: textfield;
  background: var(--card-bg);
  color: var(--text);
  letter-spacing: -0.01em;
}

.answer-input::-webkit-outer-spin-button,
.answer-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.answer-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--glow);
}

.answer-input.correct {
  border-color: var(--success);
  background: var(--success-bg);
  box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.12);
}

.answer-input.wrong {
  border-color: var(--error);
  background: var(--error-bg);
  animation: shake 0.35s ease;
  box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.12);
}

.btn-submit {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
  font-family: inherit;
  box-shadow: 0 4px 12px var(--glow);
}

.btn-submit:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 20px var(--glow);
}
.btn-submit:active { transform: scale(0.94); }

.feedback {
  font-size: 1.05rem;
  font-weight: 800;
  min-height: 36px;
  text-align: center;
  transition: all 0.2s;
}

.feedback.correct { color: var(--success); }
.feedback.wrong { color: var(--error); }

/* === Streak indicator during exercise === */
.streak-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 800;
  color: #f59e0b;
  min-height: 24px;
}

.streak-fire {
  font-size: 1rem;
  animation: pulse 0.6s ease infinite;
}

/* === Results === */
.results-container {
  width: 100%;
  max-width: 520px;
  padding: 32px 24px;
  text-align: center;
}

.results-header {
  margin-bottom: 28px;
}

.results-header h2 {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.results-header p {
  color: var(--text-light);
  font-weight: 600;
  font-size: 1rem;
}

.results-emoji {
  font-size: 5rem;
  margin-bottom: 16px;
  animation: bounceIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}

.results-stats {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.result-stat {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  padding: 18px 24px;
  box-shadow: var(--card-shadow);
  min-width: 100px;
  border: 1px solid #f1f5f9;
}

.result-stat-value {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.result-stat-label {
  font-size: 0.75rem;
  color: var(--text-light);
  font-weight: 700;
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.results-detail {
  text-align: left;
  margin-bottom: 28px;
}

.result-improvement {
  background: var(--success-bg);
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 12px;
  font-weight: 700;
  color: #15803d;
  font-size: 0.9rem;
}

.result-new-best {
  background: linear-gradient(135deg, #fef9c3, #fff7ed);
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
  font-weight: 800;
  color: #b45309;
  font-size: 0.95rem;
  animation: popIn 0.4s ease;
}

.wrong-words-section {
  margin-top: 20px;
}

.wrong-words-section h4 {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 10px;
  font-weight: 700;
}

.wrong-words-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.wrong-word-chip, .wrong-answer-chip {
  background: var(--error-bg);
  color: var(--error);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  border: 1px solid #fecaca;
}

.results-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-action {
  padding: 16px 32px;
  border-radius: 60px;
  border: none;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit;
  letter-spacing: 0.01em;
}

.btn-retry {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 6px 20px var(--glow);
  position: relative;
  overflow: hidden;
}

.btn-retry::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  animation: shimmer 2.5s linear infinite;
  background-size: 200% 100%;
}

.btn-retry:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 28px var(--glow);
}
.btn-retry:active { transform: scale(0.96); }

.btn-menu {
  background: #f1f5f9;
  color: var(--text);
  border: 1px solid #e2e8f0;
}

.btn-menu:hover {
  background: #e2e8f0;
  transform: translateY(-1px);
}

/* === Responsive === */
@media (max-width: 400px) {
  .app-title { font-size: 2rem; }
  .player-cards { flex-direction: column; gap: 14px; }
  .player-card { padding: 24px 16px; }
  .player-avatar { width: 64px; height: 64px; font-size: 1.8rem; }
  .word-display { font-size: 2.6rem; padding: 20px 16px; }
  .sum-display { font-size: 2.2rem; }
  .answer-input { font-size: 1.6rem; }
  .timer { font-size: 1.7rem; }
  .results-emoji { font-size: 3.5rem; }
  .blob { filter: blur(60px); }
}

@media (min-width: 600px) {
  .exercise-container, .menu-container, .sub-menu-container, .results-container {
    margin: 0 auto;
  }
}

/* === Touch/mobile optimizations === */
@media (hover: none) {
  .keyboard-hint { display: none; }
  .btn-word { padding: 22px; font-size: 1.15rem; }
  .btn-correct:hover, .btn-wrong:hover {
    transform: none;
    box-shadow: none;
  }
}