* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --brown-dark: #5a4632;
  --brown-mid: #8B7355;
  --brown-light: #a0916f;
  --cream: #f5f0e8;
  --cream-dark: #e8dcc8;
  --green: #4CAF50;
  --orange: #FF9800;
  --red: #f44336;
  --blue: #2196F3;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--cream);
  color: var(--brown-dark);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

.screen {
  display: none;
  position: absolute;
  inset: 0;
  flex-direction: column;
}

.screen.active {
  display: flex;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: transform 0.1s, opacity 0.1s;
  min-height: 48px;
}

.btn:active {
  transform: scale(0.96);
  opacity: 0.9;
}

.btn-primary {
  background: var(--brown-dark);
  color: #fff;
}

.btn-secondary {
  background: var(--cream-dark);
  color: var(--brown-dark);
  border: 2px solid var(--brown-mid);
}

.btn-success {
  background: var(--green);
  color: #fff;
}

.btn-small {
  padding: 10px 20px;
  font-size: 14px;
  min-height: 40px;
}

/* Home Screen */
#screen-home {
  padding: 24px;
  overflow-y: auto;
}

.home-header {
  text-align: center;
  margin-bottom: 28px;
  padding-top: 20px;
}

.home-header h1 {
  font-size: 24px;
  color: var(--brown-dark);
  margin-bottom: 4px;
}

.home-header p {
  color: var(--brown-light);
  font-size: 14px;
}

.home-logo {
  width: 96px;
  height: 96px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
  position: relative;
  border-radius: 24px;
  background: radial-gradient(circle at 30% 20%, #60a5fa, #1d4ed8 58%, #1e3a8a 100%);
  box-shadow: 0 14px 26px rgba(30, 58, 138, 0.35);
}

.logo-mark {
  font-size: 38px;
  transform: translateY(-5px);
}

.logo-word {
  position: absolute;
  bottom: 10px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: rgba(248, 250, 252, 0.95);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 28px;
}

.stat-card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  border: 1px solid var(--cream-dark);
}

.stat-card .stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--brown-dark);
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--brown-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

.home-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.home-actions .btn {
  width: 100%;
}

/* Practice Screen */
#screen-practice {
  background: var(--cream);
}

.practice-header {
  padding: 12px 16px;
  background: #fff;
  border-bottom: 1px solid var(--cream-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  z-index: 10;
  gap: 10px;
}

.task-card {
  flex: 1;
  text-align: center;
}

.task-card .task-label {
  font-size: 17px;
  font-weight: 600;
  color: var(--brown-dark);
}

.task-counter {
  font-size: 12px;
  color: var(--brown-light);
}

.btn-view-toggle {
  border: 1px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.12);
  color: #f8fafc;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  height: 34px;
  padding: 0 14px;
}

.control-hint {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 12px;
  z-index: 14;
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: #f8fafc;
  font-size: 12px;
  border-radius: 10px;
  padding: 8px 10px;
  text-align: center;
  backdrop-filter: blur(3px);
  pointer-events: none;
}

.gait-badge {
  display: none;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-left: 8px;
  text-transform: uppercase;
}

.gait-walk { background: #e3f2fd; color: #1565C0; }
.gait-trot { background: #fff3e0; color: #e65100; }
.gait-canter { background: #fce4ec; color: #c62828; }

.arena-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#arena-canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.feedback-banner {
  position: absolute;
  bottom: 80px;
  left: 12px;
  right: 12px;
  background: #fff;
  border-radius: 16px;
  padding: 16px 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  display: none;
  z-index: 20;
}

.feedback-banner.show {
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideUp 0.3s ease-out;
}

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

.feedback-correct { border-left: 4px solid var(--green); }
.feedback-almost { border-left: 4px solid var(--orange); }
.feedback-incorrect { border-left: 4px solid var(--red); }

.feedback-icon {
  font-size: 28px;
  flex-shrink: 0;
}

.feedback-body {
  flex: 1;
}

.feedback-text {
  font-size: 14px;
  color: var(--brown-dark);
  font-weight: 500;
}

.feedback-score {
  font-size: 20px;
  font-weight: 700;
  color: var(--brown-dark);
  flex-shrink: 0;
}

.practice-actions {
  position: absolute;
  bottom: 16px;
  left: 12px;
  right: 12px;
  display: none;
  gap: 10px;
  z-index: 20;
}

.practice-actions .btn {
  flex: 1;
}

.btn-end-session {
  position: absolute;
  top: 54px;
  right: 12px;
  z-index: 15;
  background: rgba(255,255,255,0.9);
  color: var(--brown-mid);
  border: 1px solid var(--cream-dark);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
  font-family: var(--font);
  font-weight: 600;
}

/* Settings Screen */
#screen-settings {
  padding: 24px;
  overflow-y: auto;
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.settings-header h2 {
  font-size: 22px;
}

.setting-group {
  margin-bottom: 20px;
}

.setting-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--brown-dark);
  margin-bottom: 8px;
}

.setting-group select,
.setting-group input[type="checkbox"] {
  font-family: var(--font);
}

.setting-group select {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 2px solid var(--cream-dark);
  background: #fff;
  font-size: 15px;
  color: var(--brown-dark);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238B7355' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--cream-dark);
}

.toggle-row label {
  margin-bottom: 0;
}

.toggle-switch {
  position: relative;
  width: 48px;
  height: 28px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--cream-dark);
  border-radius: 28px;
  transition: 0.2s;
}

.toggle-slider:before {
  content: '';
  position: absolute;
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--green);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(20px);
}

.settings-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.settings-actions .btn {
  flex: 1;
}

/* Summary Screen */
#screen-summary {
  padding: 24px;
  overflow-y: auto;
}

.summary-header {
  text-align: center;
  margin-bottom: 24px;
  padding-top: 20px;
}

.summary-header h2 {
  font-size: 22px;
  margin-bottom: 4px;
}

.summary-score-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 20px auto;
  font-size: 32px;
  font-weight: 700;
  color: var(--brown-dark);
}

.summary-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.summary-stat {
  background: #fff;
  border-radius: 10px;
  padding: 14px;
  text-align: center;
  border: 1px solid var(--cream-dark);
}

.summary-stat .value {
  font-size: 24px;
  font-weight: 700;
}

.summary-stat .label {
  font-size: 11px;
  color: var(--brown-light);
  text-transform: uppercase;
  margin-top: 4px;
}

.summary-stat.correct .value { color: var(--green); }
.summary-stat.almost .value { color: var(--orange); }
.summary-stat.incorrect .value { color: var(--red); }

.summary-info {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  border: 1px solid var(--cream-dark);
}

.summary-info h4 {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--brown-light);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.summary-info p {
  font-size: 14px;
  color: var(--brown-dark);
  line-height: 1.5;
}

.summary-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}

.summary-actions .btn {
  width: 100%;
}

.left-handed .btn-end-session {
  right: auto;
  left: 12px;
}

.left-handed .practice-actions {
  flex-direction: row-reverse;
}

.left-handed .practice-header {
  flex-direction: row-reverse;
}

@media (min-width: 600px) {
  #screen-home, #screen-settings, #screen-summary {
    max-width: 480px;
    margin: 0 auto;
    position: relative;
  }
}

/* Modern refresh */
:root {
  --bg-main: radial-gradient(circle at 10% 0%, #1f2937 0%, #0f172a 55%, #020617 100%);
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: rgba(255, 255, 255, 0.96);
  --text-main: #0f172a;
  --text-sub: #475569;
  --accent: #2563eb;
  --accent-2: #22d3ee;
}

html, body {
  background: var(--bg-main);
  color: var(--text-main);
}

#screen-home, #screen-settings, #screen-summary {
  background: linear-gradient(180deg, rgba(255,255,255,0.75), rgba(255,255,255,0.92));
  backdrop-filter: blur(8px);
}

.home-header h1 {
  font-size: 32px;
  letter-spacing: -0.02em;
}

.home-header p { color: var(--text-sub); }

.stat-card {
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.stat-card .stat-value { color: #0b3a75; }

.btn {
  border-radius: 14px;
  box-shadow: 0 8px 20px rgba(15,23,42,0.16);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #4f46e5);
}

.btn-secondary {
  background: linear-gradient(135deg, #e2e8f0, #f8fafc);
  color: #0f172a;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.practice-header {
  background: linear-gradient(90deg, rgba(15,23,42,0.9), rgba(30,41,59,0.86));
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.task-card .task-label,
.task-counter {
  color: rgba(248, 250, 252, 0.96);
}

#screen-practice {
  background: #0f172a;
}

.feedback-banner {
  border: 1px solid rgba(148,163,184,0.3);
  background: var(--surface-strong);
}