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

:root {
  --primary: #4A7CF7;
  --primary-dark: #2D5FCF;
  --primary-light: #7BA3FF;
  --amber: #F5A623;
  --amber-dark: #D4880F;
  --amber-light: #FFC145;
  --correct: #2ECC71;
  --incorrect: #E74C3C;
  --bg: #0B1120;
  --glass: rgba(74, 124, 247, 0.06);
  --glass-hover: rgba(74, 124, 247, 0.12);
  --glass-surface: rgba(74, 124, 247, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-strong: rgba(74, 124, 247, 0.2);
  --glass-border-accent: rgba(245, 166, 35, 0.25);
  --text: #E8EDF5;
  --text-secondary: #8899B4;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
  --blur: blur(16px) saturate(1.3);
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at 15% 30%, rgba(74, 124, 247, 0.1) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 20%, rgba(245, 166, 35, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(74, 124, 247, 0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 70%, rgba(245, 166, 35, 0.04) 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

body {
  max-width: 480px;
  margin: 0 auto;
  padding: 0;
  overflow-x: hidden;
}

/* ===== DECORATIVE ORBS ===== */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.bg-orb--blue {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(74, 124, 247, 0.15) 0%, transparent 70%);
  top: -80px;
  left: -100px;
}
.bg-orb--amber {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.1) 0%, transparent 70%);
  bottom: -60px;
  right: -80px;
}
.bg-orb--blue2 {
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(74, 124, 247, 0.08) 0%, transparent 70%);
  bottom: 30%;
  right: -50px;
}

/* ===== GLASS UTILITY ===== */
.glass {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

.glass-strong {
  background: var(--glass-hover);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-strong);
  box-shadow: var(--shadow);
}

/* ===== WAVE BAR (top bar Valentina) ===== */
.wave-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(11, 17, 32, 0.75);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--glass-border-strong);
}

.wave-bar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  min-height: 48px;
}

.wave-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--amber);
  white-space: nowrap;
  text-shadow: 0 0 20px rgba(245, 166, 35, 0.3);
}

.wave-label.hidden { display: none; }

.wave-container {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 24px;
}

.wave-container.hidden { display: none; }

.wave-el {
  width: 4px;
  height: 14px;
  background: var(--amber);
  border-radius: 2px;
  opacity: 0.15;
  transition: opacity 0.3s, transform 0.3s;
}

.wave-container.playing .wave-el {
  animation: waveAnim 0.5s ease-in-out infinite;
  opacity: 0.8;
}

.wave-container.playing .wave-el:nth-child(1) { animation-delay: 0.0s; height: 18px; }
.wave-container.playing .wave-el:nth-child(2) { animation-delay: 0.1s; height: 10px; }
.wave-container.playing .wave-el:nth-child(3) { animation-delay: 0.2s; height: 20px; }
.wave-container.playing .wave-el:nth-child(4) { animation-delay: 0.15s; height: 12px; }
.wave-container.playing .wave-el:nth-child(5) { animation-delay: 0.05s; height: 16px; }

@keyframes waveAnim {
  0%, 100% { transform: scaleY(0.5); }
  50% { transform: scaleY(1.3); }
}

.btn-unlock-audio {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  border-radius: 20px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(74, 124, 247, 0.3);
}

.btn-unlock-audio:active { transform: scale(0.96); }
.btn-unlock-audio:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-unlock-audio.hidden { display: none; }

/* ===== Controles de voz de Valentina (wave bar) ===== */
.wave-controls {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.wave-controls.hidden { display: none; }

.wave-btn {
  width: 46px;
  height: 46px;
  border: 1px solid var(--glass-border-strong);
  border-radius: 50%;
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--text);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.wave-btn:active { transform: scale(0.92); background: var(--glass-hover); }

.wave-btn-mic {
  width: 56px;
  height: 56px;
  border: 2px solid var(--primary);
  color: var(--primary);
  font-size: 24px;
}

.wave-btn-mic.recording {
  background: var(--incorrect);
  border-color: var(--incorrect);
  color: white;
  animation: pulse-rec 1.2s infinite;
}

@keyframes pulse-rec {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5); }
  50% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
}

.wave-status {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}

.wave-status.hidden { display: none; }

/* Botón cerrar ✕ compartido por los modales del dashboard */
.btn-close-chat {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 8px;
  transition: background 0.2s;
}

.btn-close-chat:active { background: var(--glass-hover); }

/* Aviso de texto a voz desactivado */
.tts-warning-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  margin: 0 0 10px;
}

#tts-warning-modal .btn-primary {
  width: 100%;
  margin-top: 6px;
}

/* Dashboard Valentina card */
.valentina-card {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-accent);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.valentina-card h3 {
  font-size: 16px;
  color: var(--amber);
  margin-bottom: 8px;
}

.valentina-card p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.btn-valentina-talk {
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-dark) 100%);
  color: white;
  border: none;
  border-radius: 24px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
}

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

.btn-back-dash {
  display: inline-block;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  margin-right: 10px;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.2s;
}

.btn-back-dash:active { background: var(--glass); }

.screen {
  display: none;
  padding: 20px;
  min-height: 100vh;
  flex-direction: column;
  position: relative;
  z-index: 1;
}

.screen.active {
  display: flex;
}

/* Loading */
#screen-loading {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(74, 124, 247, 0.15);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Error */
#screen-error {
  justify-content: center;
  align-items: center;
  text-align: center;
}

#screen-error h2 { color: var(--incorrect); margin-bottom: 12px; }

/* Welcome / Demo */
.welcome-card, .question-card, .result-card, .video-card {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.welcome-avatar { font-size: 64px; text-align: center; margin-bottom: 16px; }

/* Welcome — Activar a Valentina */
.hidden { display: none !important; }

#screen-welcome {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.welcome-activate {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 24px;
}

.welcome-logo {
  font-size: 72px;
  line-height: 1;
  filter: drop-shadow(0 0 24px rgba(74, 124, 247, 0.45));
  animation: welcome-pulse 2.4s ease-in-out infinite;
}

@keyframes welcome-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

.welcome-activate h2 {
  font-size: 24px;
  margin: 0;
  color: var(--text);
}

.welcome-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 8px;
}

.btn-activar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--primary);
  border: none;
  border-radius: 999px;
  padding: 14px 28px;
  cursor: pointer;
  box-shadow: 0 8px 32px rgba(74, 124, 247, 0.4);
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn-activar:active {
  transform: scale(0.96);
  box-shadow: 0 4px 16px rgba(74, 124, 247, 0.3);
}

.btn-play-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  font-size: 18px;
  color: #fff;
  padding-left: 4px;
}

.btn-play-text {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: #fff;
  text-transform: uppercase;
}

/* Activando — spinner de progreso mientras suena la bienvenida */
.activando {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.activando-spinner {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 4px solid rgba(74, 124, 247, 0.2);
  border-top-color: var(--primary);
  animation: activando-spin 0.9s linear infinite;
}

@keyframes activando-spin {
  to { transform: rotate(360deg); }
}

.activando-text {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin: 0;
}

.input-name {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-sm);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--text);
  font-size: 16px;
  margin: 16px 0;
  outline: none;
  transition: border-color 0.2s;
}

.input-name::placeholder { color: var(--text-secondary); opacity: 0.6; }
.input-name:focus { border-color: var(--primary); }

/* Question */
.question-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
}

.question-badge {
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-dark) 100%);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  display: inline-block;
  margin-bottom: 12px;
  color: white;
  font-weight: 600;
}

.question-num { font-size: 14px; color: var(--text-secondary); }
.question-cat {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--primary-light);
}

.question-text {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 20px;
  color: var(--text);
}

.question-img, .result-img {
  width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  border: 1px solid var(--glass-border);
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.option-btn {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 52px;
}

.option-btn:active, .option-btn:focus {
  border-color: var(--primary);
  background: rgba(74, 124, 247, 0.15);
  box-shadow: 0 0 20px rgba(74, 124, 247, 0.15);
}

/* Opción marcada en preguntas multirrespuesta */
.option-btn.selected {
  border-color: var(--amber);
  background: rgba(245, 166, 35, 0.2);
  box-shadow: 0 0 18px rgba(245, 166, 35, 0.2);
}

/* Hint "Selecciona todas las respuestas correctas" */
.question-multi-hint {
  color: var(--amber-light);
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 10px;
}

/* Botón "Responder" de las multirrespuesta */
.btn-confirmar-multi {
  margin-top: 14px;
  width: 100%;
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(74, 124, 247, 0.3);
}

.btn-primary:active { transform: scale(0.97); }

.btn-pista {
  background: transparent;
  border: 1px dashed var(--glass-border-strong);
  border-radius: var(--radius-sm);
  padding: 10px;
  color: var(--amber);
  font-size: 14px;
  cursor: pointer;
  width: 100%;
  margin-top: 8px;
  transition: background 0.2s;
}

.btn-pista:active { background: rgba(245, 166, 35, 0.1); }

.preguntas-restantes {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 12px;
}

/* Result */
.result-card { text-align: center; }
.result-card.correct {
  border-color: var(--correct);
  box-shadow: 0 0 30px rgba(46, 204, 113, 0.15);
}
.result-card.incorrect {
  border-color: var(--incorrect);
  box-shadow: 0 0 30px rgba(231, 76, 60, 0.15);
}
.result-title-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.result-icon { font-size: 48px; margin-bottom: 12px; }
.btn-escuchar-explicacion {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border: none;
  border-radius: 16px;
  padding: 6px 12px;
  min-width: 96px;
  cursor: pointer;
  line-height: 1.15;
  box-shadow: 0 4px 16px rgba(74, 124, 247, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-escuchar-explicacion .bee-icon {
  font-size: 15px;
  line-height: 1;
}
.btn-escuchar-explicacion .bee-label {
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
}
.btn-escuchar-explicacion:active { transform: scale(0.96); }
.result-explicacion {
  font-size: 15px;
  line-height: 1.6;
  text-align: justify;
  margin: 16px 0;
  color: var(--text);
  max-height: 32vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding-right: 4px;
}

.result-explicacion::-webkit-scrollbar { width: 6px; }
.result-explicacion::-webkit-scrollbar-thumb {
  background: var(--glass-border-strong);
  border-radius: 3px;
}
.racha {
  font-size: 18px;
  margin: 12px 0;
  color: var(--amber);
}

/* Onboarding demo — progreso */
.demo-progress {
  margin-bottom: 16px;
}

.demo-progress-label {
  display: block;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.demo-progress-bar {
  height: 6px;
  border-radius: 3px;
  background: var(--glass-border);
  overflow: hidden;
}

.demo-progress-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  transition: width 0.3s ease;
}

/* Semi-dashboard borrador */
#screen-demo-results { padding-bottom: 24px; }

.dash-borrador {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.dash-title {
  font-size: 20px;
  margin: 0 0 4px;
  color: var(--text);
  text-align: center;
}

.dash-sub {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  margin: 0 0 20px;
}

.dash-top {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
}

.dash-donut {
  width: 108px;
  height: 108px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dash-donut-center {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.dash-donut-pct {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.dash-donut-label {
  font-size: 11px;
  color: var(--text-secondary);
}

.dash-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}

.dash-stat {
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 12px 8px;
  text-align: center;
}

.dash-stat.correct { border-color: rgba(46, 204, 113, 0.35); }
.dash-stat.incorrect { border-color: rgba(231, 76, 60, 0.35); }

.dash-stat-value {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}

.dash-stat.correct .dash-stat-value { color: var(--correct); }
.dash-stat.incorrect .dash-stat-value { color: var(--incorrect); }

.dash-stat-label {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.dash-filas {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dash-row {
  display: flex;
  gap: 12px;
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.dash-row.correct { border-left-color: var(--correct); }
.dash-row.incorrect { border-left-color: var(--incorrect); }

.dash-row-icon {
  font-size: 20px;
  line-height: 1.2;
  flex-shrink: 0;
  align-self: center;
}

.dash-row-num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--glass-border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  align-self: center;
}

.dash-row-body { flex: 1; min-width: 0; }

.dash-row-question {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

.dash-row-detail {
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

.dash-row-detail .incorrect { color: var(--incorrect); }
.dash-row-detail .correct { color: var(--correct); }

.dash-row-explicacion {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}

.dash-row-audio {
  align-self: flex-start;
  background: var(--glass);
  border: 1px solid var(--glass-border-strong);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.2s;
}

.dash-row-audio:active { background: var(--glass-hover); }

/* Footer con Continuar con Google */
.demo-google-footer {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  background: #fff;
  color: #333;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-google:active { transform: scale(0.97); }

.btn-google-g {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: conic-gradient(#EA4335 0 25%, #FBBC05 0 50%, #34A853 0 75%, #4285F4 0 100%);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
  padding: 2px;
}

.demo-google-note {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 12px 0 0;
}

/* Plans */
#screen-plans { padding-bottom: 40px; }

#screen-plans h2 {
  text-align: center;
  margin-bottom: 8px;
  color: var(--text);
}

.plan-card {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.plan-card:active {
  border-color: var(--amber);
  box-shadow: 0 0 24px rgba(245, 166, 35, 0.15);
}

/* Durante el procesamiento de pago (backoff con Flow): bloquea el doble-click */
.plan-card.disabled,
.plan-card.disabled:active {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  border-color: var(--glass-border-strong);
  box-shadow: none;
}

.plan-name { font-size: 18px; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.plan-desc { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }
.plan-price {
  font-size: 24px;
  font-weight: 700;
  color: var(--amber);
  text-shadow: 0 0 20px rgba(245, 166, 35, 0.2);
}

/* Chat */
#screen-chat {
  padding: 0;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(11, 17, 32, 0.75);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--glass-border-strong);
  position: sticky;
  top: 0;
  z-index: 10;
}

.chat-header h2 { font-size: 18px; }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.4;
}

.message.valentina {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.message.user {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  color: white;
  box-shadow: 0 4px 12px rgba(74, 124, 247, 0.3);
}

.chat-input-area {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(11, 17, 32, 0.75);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-top: 1px solid var(--glass-border-strong);
  position: sticky;
  bottom: 0;
}

.chat-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--glass-border-strong);
  border-radius: 24px;
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

.chat-input::placeholder { color: var(--text-secondary); opacity: 0.6; }
.chat-input:focus { border-color: var(--primary); }

.chat-send-btn, .chat-mic-btn {
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(74, 124, 247, 0.3);
  transition: transform 0.2s;
}

.chat-send-btn:active, .chat-mic-btn:active { transform: scale(0.92); }

.chat-mic-btn {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-strong);
  box-shadow: none;
}

.chat-mic-btn.recording { background: var(--incorrect); border-color: var(--incorrect); }

/* Dashboard */
.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.dashboard-user { display: flex; align-items: center; gap: 12px; }

.dashboard-user .avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(74, 124, 247, 0.3);
}

.donuts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 8px;
}

.donut-card {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 14px 12px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.donut-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.donut-chart {
  display: flex;
  justify-content: center;
}

.donut-svg {
  width: 110px;
  height: 110px;
}

.donut-center {
  font-size: 24px;
  font-weight: 700;
  fill: var(--text);
}

.donut-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 6px;
}

.aprendizaje-msg {
  margin: 0 0 16px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.45;
  text-align: center;
}

.aprendizaje-msg.muted {
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

.aprendizaje-msg.warn {
  background: rgba(245, 166, 35, 0.08);
  border: 1px solid rgba(245, 166, 35, 0.35);
  color: var(--amber-light);
}

.aprendizaje-msg.ok {
  background: rgba(46, 204, 113, 0.08);
  border: 1px solid rgba(46, 204, 113, 0.35);
  color: var(--correct);
}

.plan-time-wrap {
  margin: 0 0 16px;
}

/* Aviso de tiempo de respuesta vs examen: mismo estilo visual que
   .aprendizaje-msg (muted/warn/ok). Va encima de la barra del plan. */
.plan-time-msg {
  margin: 0 0 12px;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.4;
}
.plan-time-msg.muted {
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
}
.plan-time-msg.warn {
  background: rgba(245, 166, 35, 0.08);
  border: 1px solid rgba(245, 166, 35, 0.35);
  color: var(--amber-light);
}
.plan-time-msg.ok {
  background: rgba(46, 204, 113, 0.08);
  border: 1px solid rgba(46, 204, 113, 0.35);
  color: var(--correct);
}

/* Aviso de plan VENCIDO: tarjeta notoria que reemplaza al botón Practicar. */
.plan-vencido-msg {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin: 0 0 16px;
  padding: 18px 16px;
  border-radius: 14px;
  background: rgba(231, 76, 60, 0.10);
  border: 2px solid rgba(231, 76, 60, 0.55);
}
.plan-vencido-icono {
  font-size: 28px;
  line-height: 1;
}
.plan-vencido-titulo {
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
}
.plan-vencido-fecha {
  font-size: 14px;
  font-weight: 700;
  color: #FF6B6B;
  text-transform: capitalize;
  margin: 4px 0 12px;
}
.btn-adquirir-plan {
  display: inline-block;
  background: linear-gradient(135deg, #E74C3C, #FF6B6B);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 10px;
  text-decoration: none;
}

.plan-time-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.plan-time-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.plan-time-fill {
  height: 100%;
  border-radius: 999px;
  width: 0;
  transition: width 0.5s ease;
}

/* Semáforo de tiempo del plan: verde <70%, amarillo 70-90%, rojo >=90% */
.plan-time-fill.verde {
  background: linear-gradient(90deg, #27AE60, #2ECC71);
}

.plan-time-fill.amarillo {
  background: linear-gradient(90deg, #F5A623, #FFC145);
}

.plan-time-fill.rojo {
  background: linear-gradient(90deg, #E74C3C, #FF6B6B);
}

.progress-chart {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.progress-chart svg {
  width: 100%;
  height: auto;
  display: block;
  max-height: 230px;
}

.progress-chart-empty {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 18px 8px;
}

.progress-meta-line {
  stroke: var(--amber);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
  opacity: 0.75;
}

.progress-meta-label {
  fill: var(--amber-light);
  font-size: 10px;
}

.progress-grid-line {
  stroke: rgba(255, 255, 255, 0.09);
  stroke-width: 1;
}

.progress-grid-line.meta {
  stroke: var(--amber);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
  opacity: 0.75;
}

.progress-y-label {
  fill: var(--text-secondary);
  font-size: 9px;
}

.progress-axis-label {
  fill: var(--text-secondary);
  font-size: 9px;
}

.progress-point {
  stroke: var(--bg);
  stroke-width: 1.5;
}

.progress-point.inactivo {
  opacity: 0.4;
}

.progress-resumen {
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.plan-info {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
}

.plan-badge {
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-dark) 100%);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  color: white;
  font-weight: 600;
}

.plan-preguntas { color: var(--text-secondary); }
.plan-expira { color: var(--text-secondary); font-size: 12px; }

/* ===== Encabezado de sección con botón ===== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 20px;
}

.section-header .section-title {
  margin: 0;
  flex: 1;
}

.section-title {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 12px;
  color: var(--text);
  border-left: 3px solid var(--amber);
  padding-left: 12px;
}

.category-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.category-label { min-width: 100px; font-size: 13px; color: var(--text); }

.bar-track {
  flex: 1;
  height: 8px;
  background: rgba(74, 124, 247, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 4px;
  transition: width 0.5s;
  box-shadow: 0 0 12px rgba(74, 124, 247, 0.3);
}

.category-pct { font-size: 12px; color: var(--text-secondary); min-width: 50px; text-align: right; }

.history-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  transition: background 0.2s;
}

.history-icon { font-size: 16px; }
.history-text { flex: 1; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
.history-date { font-size: 11px; color: var(--text-secondary); white-space: nowrap; }

.achievement {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  transition: background 0.2s;
}

.achievement.locked { opacity: 0.4; }
.achievement-icon { font-size: 24px; }
.achievement-info { flex: 1; }
.achievement-name { font-size: 14px; font-weight: 600; color: var(--text); }
.achievement-desc { font-size: 12px; color: var(--text-secondary); }

/* Toast */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(11, 17, 32, 0.88);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--text);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border-strong);
  font-size: 14px;
  transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
  z-index: 9999;
  max-width: calc(100% - 40px);
  text-align: center;
  box-shadow: var(--shadow);
}

.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== Dialog de pago exitoso (centrado) ===== */
.payment-success-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.payment-success-modal.show {
  opacity: 1;
  pointer-events: auto;
}

.payment-success-dialog {
  background: linear-gradient(180deg, rgba(74, 124, 247, 0.14), rgba(11, 17, 32, 0.96));
  border: 1px solid var(--glass-border-accent);
  border-radius: var(--radius);
  padding: 32px 24px;
  max-width: 340px;
  width: calc(100% - 48px);
  text-align: center;
  box-shadow: var(--shadow);
  transform: scale(0.88);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}

.payment-success-modal.show .payment-success-dialog {
  transform: scale(1);
}

.payment-success-icon {
  font-size: 56px;
  margin-bottom: 12px;
  animation: payment-pop 0.45s cubic-bezier(0.32, 0.72, 0, 1);
}

.payment-success-dialog h2 {
  font-size: 22px;
  color: var(--text);
  margin-bottom: 8px;
}

.payment-success-dialog p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

@keyframes payment-pop {
  0% { transform: scale(0.4); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

/* Empty state */
.empty-state {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  padding: 32px;
}

/* Video container */
.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
  margin: 16px 0;
  border: 1px solid var(--glass-border);
}

.video-container iframe, .video-container video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Utilities */
.btn-logout {
  background: #dc2626;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid rgba(220, 38, 38, 0.5);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.2s;
}

.btn-logout:active { background: #b91c1c; }

.btn-start-quiz {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  border-radius: var(--radius);
  padding: 18px 24px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  margin-top: 16px;
  margin-bottom: 20px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(74, 124, 247, 0.35);
}

.btn-start-quiz:active { transform: scale(0.97); }

/* Correct / Incorrect status pills */
.status-correct, .status-incorrect {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.status-correct {
  background: rgba(46, 204, 113, 0.15);
  color: var(--correct);
  border: 1px solid rgba(46, 204, 113, 0.3);
}
.status-incorrect {
  background: rgba(231, 76, 60, 0.15);
  color: var(--incorrect);
  border: 1px solid rgba(231, 76, 60, 0.3);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--glass-border-strong);
  border-radius: 2px;
}

/* ===== LEGAL PAGES (Términos y Privacidad) ===== */
.legal-page {
  padding: 0 0 80px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.legal-header {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--glass-border-strong);
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 12px;
}

.legal-header-back {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  color: var(--text);
  text-decoration: none;
  font-size: 18px;
  flex-shrink: 0;
  transition: background 0.2s;
}

.legal-header-back:active { background: var(--glass-hover); }

.legal-header-info { flex: 1; }

.legal-header-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.legal-header-sub {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.legal-header-badge {
  font-size: 10px;
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-dark) 100%);
  color: white;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  white-space: nowrap;
}

.legal-container {
  padding: 16px 20px;
  max-width: 480px;
  margin: 0 auto;
}

.legal-hero {
  text-align: center;
  padding: 24px 0 20px;
}

.legal-hero h1 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
}

.legal-hero p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.legal-hero-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.legal-toc {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.legal-toc-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--amber);
  margin-bottom: 12px;
  text-shadow: 0 0 20px rgba(245, 166, 35, 0.15);
}

.legal-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.legal-toc-list li {
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.legal-toc-list li:last-child { border-bottom: none; }

.legal-toc-list a {
  color: var(--primary-light);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
  display: block;
  padding: 2px 0;
}

.legal-toc-list a:active { color: var(--amber); }

.legal-section {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  scroll-margin-top: 70px;
}

.legal-section h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--glass-border);
}

.legal-section h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--amber);
  margin: 14px 0 8px;
}

.legal-section p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.legal-section p:last-child { margin-bottom: 0; }

.legal-section ul, .legal-section ol {
  margin: 8px 0 12px;
  padding-left: 20px;
}

.legal-section li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.legal-section strong {
  color: var(--text);
  font-weight: 600;
}

.legal-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  margin-right: 4px;
}

.legal-tag--blue {
  background: rgba(74, 124, 247, 0.15);
  color: var(--primary-light);
  border: 1px solid rgba(74, 124, 247, 0.25);
}

.legal-tag--amber {
  background: rgba(245, 166, 35, 0.15);
  color: var(--amber);
  border: 1px solid rgba(245, 166, 35, 0.25);
}

.legal-tag--green {
  background: rgba(46, 204, 113, 0.15);
  color: var(--correct);
  border: 1px solid rgba(46, 204, 113, 0.25);
}

.legal-highlight {
  background: rgba(74, 124, 247, 0.08);
  border-left: 3px solid var(--primary);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 14px 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.legal-footer {
  text-align: center;
  padding: 24px 20px 32px;
  border-top: 1px solid var(--glass-border);
  margin-top: 12px;
}

.legal-footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.legal-footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}

.legal-footer-links a:active { color: var(--primary-light); }

.legal-footer-copy {
  font-size: 11px;
  color: var(--text-secondary);
  opacity: 0.5;
}

.legal-updated {
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  opacity: 0.6;
  margin-bottom: 8px;
}

/* App footer on main pages */
.app-footer {
  text-align: center;
  padding: 20px 20px 24px;
  margin-top: 20px;
  border-top: 1px solid var(--glass-border);
  position: relative;
  z-index: 1;
}

.app-footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 10px;
}

.app-footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 12px;
  transition: color 0.2s;
  opacity: 0.6;
}

.app-footer-links a:active { opacity: 1; color: var(--primary-light); }

.app-footer-copy {
  font-size: 11px;
  color: var(--text-secondary);
  opacity: 0.4;
}

/* Back to top */
.legal-back-top {
  display: block;
  text-align: center;
  padding: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  margin-top: 8px;
  transition: color 0.2s;
}

.legal-back-top:active { color: var(--amber); }

/* Responsive */
@media (min-width: 481px) {
  body { padding: 20px 0; }
  .screen { border-radius: var(--radius); }
  .legal-page { max-width: 720px; margin: 0 auto; }
  .legal-container { max-width: 680px; }
}

/* ===== Pantalla de login (usuario registrado sin sesión) ===== */
.login-pantalla {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 70vh;
  padding: 32px 24px;
  gap: 12px;
}

.login-logo {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  margin-bottom: 12px;
  /* Resplandor alrededor del logo */
  box-shadow:
    0 0 22px rgba(74, 124, 247, 0.85),
    0 0 50px rgba(74, 124, 247, 0.55),
    0 0 90px rgba(74, 124, 247, 0.35);
}

.login-titulo {
  font-size: 26px;
  font-weight: 700;
  margin: 0;
  color: var(--text);
}

.login-sub {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0 0 20px;
  max-width: 320px;
}

/* "Clase B" destacada: amarillo brillante, más grande y más gruesa */
.login-clase-b {
  font-size: 1.2em;
  font-weight: 900;
  color: #FFD700;
}

.login-note {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 16px;
}

/* Aviso legal resaltado bajo el botón de Google (aceptación de términos) */
.login-legal-aviso {
  margin-top: 18px;
  padding: 10px 14px;
  width: 100%;
  max-width: 340px;
  border: 1px solid var(--amber);
  border-radius: 10px;
  background: rgba(245, 166, 35, 0.10);
  color: var(--amber);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-align: center;
  line-height: 1.4;
}

/* Enlaces legales pequeños bajo el botón de Google (login) */
.login-legal {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}
.login-legal a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.login-legal a:active { color: var(--primary-light); }
.login-legal-sep { opacity: 0.6; }

/* ===== Instalación PWA: banner + modal ===== */
.install-banner {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 250;
  background: rgba(11, 17, 32, 0.94);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transform: translateY(140%);
  transition: transform 0.35s ease;
  pointer-events: none;
}

.install-banner.show {
  transform: translateY(0);
  pointer-events: auto;
}

.install-banner-content {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
}

.install-banner-icon {
  font-size: 26px;
  flex-shrink: 0;
}

.install-banner-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.install-banner-text strong {
  color: var(--text);
  font-size: 14px;
  line-height: 1.3;
}

.install-banner-text span {
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.3;
}

.install-banner-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.install-banner-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 15px;
  cursor: pointer;
  padding: 4px;
  align-self: flex-start;
  flex-shrink: 0;
}

.install-modal {
  position: fixed;
  inset: 0;
  z-index: 310;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.install-modal.show {
  opacity: 1;
  pointer-events: auto;
}

.install-modal-dialog {
  background: var(--bg);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  max-width: 340px;
  width: calc(100% - 48px);
  text-align: center;
  box-shadow: var(--shadow);
  transform: scale(0.88);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}

.install-modal.show .install-modal-dialog {
  transform: scale(1);
}

.install-modal-dialog h3 {
  color: var(--text);
  margin-bottom: 14px;
  font-size: 18px;
}

.install-pasos {
  text-align: left;
  color: var(--text-secondary);
  padding-left: 20px;
  margin-bottom: 20px;
  font-size: 14px;
  line-height: 1.8;
}

.install-pasos li strong {
  color: var(--text);
}

.install-pasos li.hidden {
  display: none;
}

.footer-install-link {
  color: var(--amber);
}

/* Boton del toast de nueva version */
.toast-btn {
  background: #A8E6B5;
  color: #1A1D2E;
  border: none;
  border-radius: 8px;
  padding: 0;
  font-weight: 800;
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
  width: 100px;
  height: 40px;
  max-width: 160px;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

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

/* ===== Boton "Ver mas" (historial) ===== */
.btn-ver-mas {
  display: inline-block;
  padding: 8px 14px;
  background: var(--glass-hover);
  border: 1px solid rgba(74, 124, 247, 0.55);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-ver-mas:active {
  background: var(--glass-hover);
}

/* ===== Modal historial completo ===== */
.history-modal {
  position: fixed;
  inset: 0;
  z-index: 310;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.history-modal.show {
  opacity: 1;
  pointer-events: auto;
}

.history-modal-dialog {
  background: var(--bg);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-lg);
  max-width: 420px;
  width: calc(100% - 32px);
  max-height: 82vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transform: scale(0.92);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
  overflow: hidden;
}

.history-modal.show .history-modal-dialog {
  transform: scale(1);
}

.history-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--glass-border);
}

.history-modal-header h3 {
  color: var(--text);
  font-size: 16px;
  margin: 0;
}

.history-modal-filters {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--glass-border);
}

.filter-chip {
  flex: 1;
  padding: 8px 10px;
  background: var(--glass);
  border: 1px solid var(--glass-border-strong);
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.filter-chip.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 8px rgba(74, 124, 247, 0.35);
}

.filter-chip:active {
  transform: scale(0.97);
}

.history-modal-list {
  overflow-y: auto;
  padding: 12px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.history-modal-item {
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--incorrect);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

.history-modal-item.correct {
  border-left-color: var(--correct);
}

.history-modal-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.history-modal-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  flex: 1;
}

.history-modal-date {
  font-size: 11px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.history-modal-q {
  font-size: 13px;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 6px;
}

.history-modal-answer {
  font-size: 12px;
  color: var(--text-secondary);
}

.history-modal-answer strong {
  color: var(--incorrect);
}

.history-modal-answer.correct strong {
  color: var(--correct);
}

.history-modal-audio-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 8px;
  margin-left: auto;
  padding: 7px 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(74, 124, 247, 0.3);
  transition: transform 0.2s;
}

.history-modal-audio-btn:active {
  transform: scale(0.96);
}

.history-modal-meta {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.history-loading {
  color: var(--text-secondary);
  text-align: center;
  padding: 20px;
  font-size: 13px;
}