/* Variables necesarias */
:root {
  --primary-color: rgba(1, 1, 1, 0.9);
  --secondary-color: #ff8c42;
  --accent-color: #4a6fa5;
  --infinitive-color: #4caf50;
  --gerund-color: #2196f3;
  --both-color: #9c27b0;
  --white: #ffffff;
  --black: #000000;
  --light-gray: #f5f5f5;
  --dark-gray: #333333;
  --correct-color: #4caf50;
  --incorrect-color: #f44336;
  --warning-color: #ff9800;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --border-radius: 12px;
}

/* Reset básico */
* {
  font-family: "Poppins", sans-serif;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--primary-color);
  padding: 0 10%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border-bottom: 2px solid var(--secondary-color);
  transition: all 0.3s ease;
}

.header:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--white);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  letter-spacing: 1px;
}

.navigation ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.header .navigation ul li {
  float: left;
  position: relative;
}

.header .navigation ul li a {
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
  text-decoration: none;
  padding: 22px 20px;
  display: block;
  transition: all 0.3s ease;
}

.header .navigation ul li a:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  color: var(--black);
}

#toggle,
.header label {
  display: none;
  cursor: pointer;
}

.menu {
  width: 28px;
  height: 28px;
  filter: brightness(0) invert(1);
}

/* Animación para el menú desplegable */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Ajuste para el body debido al header fijo */
body {
  padding-top: 80px;
  background-color: var(--light-gray);
  color: var(--dark-gray);
  line-height: 1.6;
}

/* Estilos generales del contenedor */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* Sección de Instrucciones */
.instructions-section {
  background-color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 30px;
}

.instructions-section h1 {
  color: var(--accent-color);
  margin-bottom: 20px;
  font-size: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.instructions-section h2 {
  color: var(--dark-gray);
  margin-bottom: 15px;
  font-size: 22px;
}

.instructions-container p {
  margin-bottom: 25px;
  font-size: 17px;
  color: #555;
}

.rules-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
  margin-bottom: 30px;
}

.rule-card {
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  padding: 20px;
  border-top: 4px solid;
}

.infinitive-rule {
  border-top-color: var(--infinitive-color);
}

.gerund-rule {
  border-top-color: var(--gerund-color);
}

.both-rule {
  border-top-color: var(--both-color);
}

.rule-card h3 {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
}

.infinitive-rule h3 {
  color: var(--infinitive-color);
}

.gerund-rule h3 {
  color: var(--gerund-color);
}

.both-rule h3 {
  color: var(--both-color);
}

.verb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 15px 0;
}

.verb-tag {
  background-color: var(--white);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.infinitive-rule .verb-tag {
  border-left: 3px solid var(--infinitive-color);
}

.gerund-rule .verb-tag {
  border-left: 3px solid var(--gerund-color);
}

.both-rule .verb-tag {
  border-left: 3px solid var(--both-color);
}

.example {
  background-color: var(--white);
  padding: 12px;
  border-radius: 8px;
  margin-top: 10px;
  border-left: 3px solid var(--secondary-color);
}

.highlight {
  color: var(--secondary-color);
  font-weight: 600;
}

.game-types {
  margin: 30px 0;
}

.game-types h3 {
  color: var(--dark-gray);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.game-modes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.mode-card {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border-radius: var(--border-radius);
  padding: 25px;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
}

.mode-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
}

.mode-card i {
  font-size: 40px;
  color: var(--accent-color);
  margin-bottom: 15px;
}

.mode-card h4 {
  color: var(--dark-gray);
  margin-bottom: 10px;
  font-size: 18px;
}

.mode-card p {
  font-size: 14px;
  color: #666;
}

.start-button-container {
  text-align: center;
  margin-top: 30px;
}

/* Botones */
.btn-primary, .btn-secondary, .option-btn, .check-btn {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-primary {
  background-color: var(--secondary-color);
  color: var(--black);
}

.btn-primary:hover {
  background-color: #e67e22;
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
  background-color: var(--accent-color);
  color: var(--white);
}

.btn-secondary:hover {
  background-color: #3a5a8a;
  transform: translateY(-3px);
}

.btn-secondary:disabled {
  background-color: #cccccc;
  cursor: not-allowed;
  transform: none;
}

/* Sección de Clasificación */
.classification-section {
  background-color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 30px;
}

.classification-section h2 {
  color: var(--accent-color);
  margin-bottom: 25px;
  font-size: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.classification-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.category-box {
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  padding: 20px;
  border-top: 4px solid;
}

.infinitive-box {
  border-top-color: var(--infinitive-color);
}

.gerund-box {
  border-top-color: var(--gerund-color);
}

.both-box {
  border-top-color: var(--both-color);
}

.category-box h3 {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
}

.infinitive-box h3 {
  color: var(--infinitive-color);
}

.gerund-box h3 {
  color: var(--gerund-color);
}

.both-box h3 {
  color: var(--both-color);
}

.verbs-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 100px;
  padding: 15px;
  background-color: var(--white);
  border-radius: 8px;
  border: 2px dashed #ddd;
}

.practice-tip {
  padding: 20px;
  background-color: #f0f7ff;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--accent-color);
}

.practice-tip h4 {
  color: var(--dark-gray);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Sección del Juego */
.game-section {
  background-color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 30px;
}

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  background-color: var(--light-gray);
  padding: 15px 20px;
  border-radius: var(--border-radius);
  flex-wrap: wrap;
  gap: 15px;
}

.game-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.mode-indicator {
  background-color: var(--accent-color);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
}

.score-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 100px;
}

.score-label {
  font-size: 14px;
  color: #777;
  margin-bottom: 5px;
}

.score {
  font-size: 32px;
  font-weight: 700;
  color: var(--secondary-color);
}

.progress-container {
  flex-grow: 1;
  max-width: 300px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: #e0e0e0;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  background-color: var(--accent-color);
  width: 10%;
  transition: width 0.3s ease;
}

#question-counter {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark-gray);
}

.game-card {
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  padding: 30px;
}

.active-game {
  display: block;
}

.question-container {
  margin-bottom: 30px;
}

.question-container h3 {
  color: var(--dark-gray);
  margin-bottom: 20px;
  font-size: 20px;
}

/* Juego de Clasificación */
.draggable-verbs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
  padding: 20px;
  background-color: var(--white);
  border-radius: var(--border-radius);
  border: 2px dashed #ddd;
  min-height: 100px;
}

.draggable-verb {
  background-color: var(--white);
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: move;
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.draggable-verb:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 10px rgba(0,0,0,0.15);
}

.draggable-verb.dragging {
  opacity: 0.5;
}

.drop-zones {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.drop-zone {
  background-color: var(--white);
  border-radius: var(--border-radius);
  padding: 20px;
  border: 3px dashed;
  min-height: 150px;
  transition: all 0.3s ease;
}

.drop-zone h4 {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
}

.infinitive-drop {
  border-color: var(--infinitive-color);
}

.infinitive-drop h4 {
  color: var(--infinitive-color);
}

.gerund-drop {
  border-color: var(--gerund-color);
}

.gerund-drop h4 {
  color: var(--gerund-color);
}

.both-drop {
  border-color: var(--both-color);
}

.both-drop h4 {
  color: var(--both-color);
}

.drop-zone.drag-over {
  background-color: rgba(0, 0, 0, 0.05);
  transform: scale(1.02);
}

.dropped-verbs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 80px;
}

/* Juego de Completar */
.sentence-text {
  background-color: var(--white);
  padding: 25px;
  border-radius: var(--border-radius);
  font-size: 22px;
  font-weight: 600;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border: 2px solid var(--accent-color);
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
  margin-bottom: 25px;
}

.option-btn {
  background-color: var(--white);
  color: var(--dark-gray);
  padding: 20px;
  text-align: left;
  border: 2px solid #ddd;
  font-size: 18px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 15px;
}

.option-btn:hover {
  border-color: var(--accent-color);
  background-color: #f0f7ff;
}

.option-btn.correct-answer {
  background-color: #d4edda;
  border-color: var(--correct-color);
  color: #155724;
}

.option-btn.incorrect-answer {
  background-color: #f8d7da;
  border-color: var(--incorrect-color);
  color: #721c24;
}

.option-number {
  background-color: var(--accent-color);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.feedback-container {
  margin-bottom: 25px;
}

.feedback {
  padding: 15px;
  border-radius: var(--border-radius);
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.feedback.correct {
  background-color: #d4edda;
  color: #155724;
  border-left: 4px solid var(--correct-color);
}

.feedback.incorrect {
  background-color: #f8d7da;
  color: #721c24;
  border-left: 4px solid var(--incorrect-color);
}

.feedback.hint {
  background-color: #fff3cd;
  color: #856404;
  border-left: 4px solid var(--warning-color);
}

.game-controls {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.score-summary {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 25px;
  padding-top: 20px;
  border-top: 2px solid #eee;
}

.summary-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
}

.correct-icon {
  color: var(--correct-color);
  font-size: 20px;
}

.incorrect-icon {
  color: var(--incorrect-color);
  font-size: 20px;
}

/* Sección de Práctica */
.practice-section {
  background-color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 30px;
}

.practice-section h2 {
  color: var(--accent-color);
  margin-bottom: 25px;
  font-size: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.practice-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

@media (max-width: 992px) {
  .practice-container {
    grid-template-columns: 1fr;
  }
}

.exercise-card {
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  padding: 25px;
}

.exercise-card h3 {
  color: var(--dark-gray);
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.writing-exercise {
  margin-top: 20px;
}

.exercise-item {
  background-color: var(--white);
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 15px;
  border-left: 3px solid var(--accent-color);
}

.exercise-item p {
  margin-bottom: 10px;
  font-size: 16px;
}

.answer-input {
  width: 100%;
  padding: 10px;
  border: 2px solid #ddd;
  border-radius: 6px;
  font-size: 16px;
  margin-bottom: 10px;
  transition: border-color 0.3s;
}

.answer-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.check-btn {
  padding: 8px 16px;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.3s;
}

.check-btn:hover {
  background-color: #3a5a8a;
}

.quick-reference {
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  padding: 25px;
}

.quick-reference h3 {
  color: var(--dark-gray);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.reference-tables {
  margin-bottom: 25px;
}

.reference-table {
  background-color: var(--white);
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
  border-top: 3px solid;
}

.reference-table:nth-child(1) {
  border-top-color: var(--infinitive-color);
}

.reference-table:nth-child(2) {
  border-top-color: var(--gerund-color);
}

.reference-table:nth-child(3) {
  border-top-color: var(--both-color);
}

.reference-table h4 {
  margin-bottom: 10px;
  font-size: 16px;
}

.reference-table:nth-child(1) h4 {
  color: var(--infinitive-color);
}

.reference-table:nth-child(2) h4 {
  color: var(--gerund-color);
}

.reference-table:nth-child(3) h4 {
  color: var(--both-color);
}

.verb-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.verb-ref {
  background-color: #f8f9fa;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
}

.memory-tip {
  padding: 20px;
  background-color: #f0f7ff;
  border-radius: 8px;
  border-left: 4px solid var(--warning-color);
}

.memory-tip h4 {
  color: var(--dark-gray);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.memory-tip p {
  margin-bottom: 10px;
  font-size: 14px;
}

/* Footer */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  text-align: center;
  padding: 25px;
  margin-top: 30px;
}

.footer p {
  margin-bottom: 10px;
}

.copyright {
  font-size: 14px;
  color: #aaa;
}

/* Media Queries para responsive */
@media (max-width: 950px) {
  .header label {
    display: initial;
  }

  .header {
    padding: 15px 10%;
  }

  .header .navigation {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-color);
    display: none;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }

  .header .navigation ul li {
    width: 100%;
  }

  .header .navigation ul li a {
    padding: 12px 20px;
    font-size: 18px;
  }

  #toggle:checked ~ .navigation {
    display: block;
    animation: slideDown 0.4s ease-out;
  }
  
  .game-header {
    flex-direction: column;
    text-align: center;
  }
  
  .game-info {
    flex-direction: column;
    gap: 10px;
  }
  
  .drop-zones {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .rules-overview {
    grid-template-columns: 1fr;
  }
  
  .game-modes {
    grid-template-columns: 1fr;
  }
  
  .classification-container {
    grid-template-columns: 1fr;
  }
  
  .options-grid {
    grid-template-columns: 1fr;
  }
  
  .game-controls {
    flex-direction: column;
  }
  
  .btn-primary, .btn-secondary, .option-btn {
    width: 100%;
  }
  
  .score-summary {
    flex-direction: column;
    gap: 15px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 22px;
  }

  .header {
    padding: 12px 5%;
  }
  
  .sentence-text {
    font-size: 18px;
    padding: 15px;
  }
  
  .draggable-verbs {
    justify-content: center;
  }
}