/* Variables CSS para temas */
:root {
  /* Tema claro (predeterminado) */
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --text-primary: #333333;
  --text-secondary: #666666;
  --accent-color: #4caf50;
  --accent-hover: #45a049;
  --card-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  --border-color: #e0e0e0;
  --success-color: #4caf50;
  --success-bg: #e8f5e9;
  --error-color: #f44336;
  --error-bg: #ffebee;
  --header-bg: #ffffff;
  --footer-bg: #f5f7fa;
}

/* Tema oscuro */
.dark-theme {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --accent-color: #4caf50;
  --accent-hover: #66bb6a;
  --card-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
  --border-color: #333333;
  --success-color: #66bb6a;
  --success-bg: #1b5e20;
  --error-color: #ef5350;
  --error-bg: #b71c1c;
  --header-bg: #1e1e1e;
  --footer-bg: #121212;
}

/* Estilos generales */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease,
    opacity 0.3s ease;
}

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Selector de tema */
.theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background-color: var(--bg-secondary);
  border-radius: 20px;
  padding: 5px 10px;
  display: flex;
  align-items: center;
  cursor: pointer;
  box-shadow: var(--card-shadow);
  z-index: 100;
}

.theme-icon {
  padding: 5px;
  border-radius: 50%;
}

.dark-theme .light-icon,
:not(.dark-theme) .dark-icon {
  opacity: 0.5;
}

/* Header */
header {
  background-color: var(--header-bg);
  padding: 30px 20px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: relative;
}

.logo h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -1px;
}

.accent {
  color: var(--accent-color);
}

.tagline {
  color: var(--text-secondary);
  margin-top: 10px;
  font-size: 1.1rem;
}

.nav-buttons {
  margin-top: 15px;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 8px 15px;
  border-radius: 20px;
  background-color: var(--bg-secondary);
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease;
}

.btn-back:hover {
  transform: translateX(-5px);
}

.back-icon {
  margin-right: 5px;
  font-size: 1.2rem;
}

/* Main content */
main {
  flex: 1;
  padding: 30px 20px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.intro {
  text-align: center;
  margin-bottom: 40px;
}

.intro h2 {
  font-size: 1.8rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.intro p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Categorías */
.categories-grid {
  display: grid;
  gap: 25px;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.category {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 15px;
  box-shadow: var(--card-shadow);
  padding: 30px 20px;
  text-align: center;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 2px solid transparent;
}

.category:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  border-color: var(--accent-color);
}

.category-icon {
  font-size: 3rem;
  margin-bottom: 15px;
}

.category h3 {
  font-size: 1.3rem;
  font-weight: 600;
}

/* Juego */
.game-container {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.category-badge {
  background-color: var(--accent-color);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  display: inline-block;
  align-self: center;
  margin-bottom: 10px;
  box-shadow: var(--card-shadow);
}

.progress-container {
  background-color: var(--bg-secondary);
  border-radius: 10px;
  height: 30px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--card-shadow);
  margin-bottom: 10px;
}

.progress-bar {
  background-color: var(--accent-color);
  height: 100%;
  width: 0%;
  transition: width 0.5s ease;
}

.progress-text {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
}

.card {
  background-color: var(--bg-secondary);
  border-radius: 15px;
  padding: 25px;
  box-shadow: var(--card-shadow);
}

.card h2,
.card h3 {
  font-size: 1.3rem;
  margin-bottom: 15px;
  color: var(--text-primary);
  text-align: center;
}

.word-display {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-color);
  text-align: center;
  margin: 20px 0;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.word-hint {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 10px;
}

#controls-section {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Poppins", sans-serif;
  font-size: 1rem;
  font-weight: 500;
  color: white;
  padding: 12px 20px;
  background-color: var(--accent-color);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
  flex: 1;
  min-width: 200px;
}

button:hover {
  background-color: var(--accent-hover);
  transform: translateY(-3px);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  background-color: var(--text-secondary);
  cursor: not-allowed;
  transform: none;
}

.btn-icon {
  margin-right: 8px;
  font-size: 1.2rem;
}

.btn-recording.active {
  background-color: var(--error-color);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(244, 67, 54, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(244, 67, 54, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(244, 67, 54, 0);
  }
}

.btn-next {
  background-color: var(--accent-color);
  margin-top: 15px;
}

.attempt-display {
  min-height: 50px;
  padding: 15px;
  background-color: var(--bg-primary);
  border-radius: 10px;
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-display {
  min-height: 50px;
  padding: 15px;
  border-radius: 10px;
  text-align: center;
  font-size: 1.2rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
}

.success {
  color: var(--success-color);
  background-color: var(--success-bg);
}

.fail {
  color: var(--error-color);
  background-color: var(--error-bg);
}

.hidden {
  display: none;
}

/* Footer */
footer {
  background-color: var(--footer-bg);
  padding: 30px 20px;
  text-align: center;
  margin-top: auto;
}

.stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 20px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-color);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.copyright {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.copyright a {
  color: var(--accent-color);
  text-decoration: none;
}

.copyright a:hover {
  text-decoration: underline;
}

/* Animaciones */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

.card {
  animation: slideUp 0.5s ease forwards;
}

/* Media Queries */
@media (max-width: 768px) {
  .logo h1 {
    font-size: 2rem;
  }

  .categories-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
  }

  .category-icon {
    font-size: 2.5rem;
  }

  .word-display {
    font-size: 2rem;
  }

  button {
    padding: 10px 15px;
    font-size: 0.9rem;
  }

  .stats {
    flex-direction: column;
    gap: 15px;
  }
}

@media (max-width: 480px) {
  header {
    padding: 20px 15px;
  }

  .logo h1 {
    font-size: 1.8rem;
  }

  main {
    padding: 20px 15px;
  }

  .card {
    padding: 20px 15px;
  }

  .word-display {
    font-size: 1.8rem;
  }

  #controls-section {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}