:root {
  --violet-50: #f5f3ff;
  --violet-100: #ede9fe;
  --violet-200: #ddd6fe;
  --violet-300: #c4b5fd;
  --violet-400: #a78bfa;
  --violet-500: #8b5cf6;
  --violet-600: #7c3aed;
  --violet-700: #6d28d9;
  --violet-800: #5b21b6;
  --lilac-300: #d8b4fe;
  --lilac-400: #c084fc;
  --ink: #2e1065;
  --ink-soft: #4c1d95;
  --bg: #faf8ff;
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  overscroll-behavior-y: none;
  -webkit-font-smoothing: antialiased;
}

#app {
  min-height: 100vh;
  min-height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, .font-display {
  font-family: 'Poppins', sans-serif;
}

/* Scrollbar discreta */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-thumb { background: var(--violet-300); border-radius: 4px; }

/* Sfondo con gradiente viola/lilla soft */
.bg-brand-gradient {
  background: linear-gradient(160deg, var(--violet-600) 0%, var(--violet-500) 45%, var(--lilac-400) 100%);
}
.bg-brand-soft {
  background: linear-gradient(160deg, var(--violet-100) 0%, #ffffff 60%);
}

.card {
  background: #ffffff;
  border-radius: 22px;
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.08), 0 1px 3px rgba(124, 58, 237, 0.06);
  border: 1px solid rgba(124, 58, 237, 0.06);
}

.btn-primary {
  background: linear-gradient(135deg, var(--violet-600), var(--violet-500));
  color: white;
  font-weight: 700;
  border-radius: 16px;
  padding: 14px 24px;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s;
  border: none;
  font-family: 'Poppins', sans-serif;
}
.btn-primary:active { transform: scale(0.97); box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3); }
.btn-primary:disabled { opacity: 0.45; box-shadow: none; }

.btn-secondary {
  background: var(--violet-50);
  color: var(--violet-700);
  font-weight: 700;
  border-radius: 16px;
  padding: 14px 24px;
  border: 1.5px solid var(--violet-200);
  transition: transform 0.15s ease, background 0.15s;
  font-family: 'Poppins', sans-serif;
}
.btn-secondary:active { transform: scale(0.97); background: var(--violet-100); }

.btn-secondary-inverse {
  background: rgba(255,255,255,0.15);
  color: white;
  font-weight: 700;
  border-radius: 16px;
  padding: 14px 24px;
  border: 1.5px solid rgba(255,255,255,0.3);
  transition: transform 0.15s ease, background 0.15s;
  font-family: 'Poppins', sans-serif;
}
.btn-secondary-inverse:active { transform: scale(0.97); background: rgba(255,255,255,0.25); }

.badge-level {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Poppins', sans-serif;
  font-weight: 800;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--violet-600), var(--lilac-400));
  color: white;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

.option-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1.5px solid var(--violet-200);
  background: white;
  font-weight: 600;
  color: var(--ink-soft);
  transition: all 0.15s ease;
  font-size: 15px;
}
.option-btn:active { transform: scale(0.98); }
.option-btn.selected {
  border-color: var(--violet-500);
  background: var(--violet-50);
  color: var(--violet-700);
}
.option-btn.correct {
  border-color: #22c55e;
  background: #f0fdf4;
  color: #15803d;
}
.option-btn.incorrect {
  border-color: #ef4444;
  background: #fef2f2;
  color: #b91c1c;
}

.mic-btn {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--violet-600), var(--violet-500));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
  border: none;
  transition: all 0.2s ease;
}
.mic-btn.recording {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5);
  animation: pulse-record 1.4s infinite;
}
@keyframes pulse-record {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5); }
  70% { box-shadow: 0 0 0 18px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.progress-bar-track {
  height: 8px;
  background: var(--violet-100);
  border-radius: 8px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--violet-500), var(--lilac-400));
  border-radius: 8px;
  transition: width 0.4s ease;
}

.lesson-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.spinner {
  border: 3px solid var(--violet-100);
  border-top-color: var(--violet-600);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.fade-in { animation: fadeIn 0.35s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

input[type="text"], textarea, input[type="tel"], input[type="password"] {
  font-family: 'Nunito', sans-serif;
}

.pin-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--violet-300);
  transition: all 0.15s;
}
.pin-dot.filled {
  background: var(--violet-600);
  border-color: var(--violet-600);
}

#pin-dots.shake {
  animation: shake-anim 0.45s ease;
}
@keyframes shake-anim {
  10%, 90% { transform: translateX(-8px); }
  20%, 80% { transform: translateX(8px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}

.pin-key {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: white;
  border: 1.5px solid var(--violet-200);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Poppins', sans-serif;
}
.pin-key:active { background: var(--violet-100); transform: scale(0.95); }