/* Chapter Solver Pages CSS */

.chapter-hero {
  padding: 50px 0;
  text-align: center;
  background-color: var(--secondary-bg);
  border-radius: 0 0 20px 20px;
  margin-bottom: 40px;
}

.chapter-hero h1 {
  font-size: 2.2rem;
  margin-bottom: 15px;
  background: linear-gradient(to right, var(--accent-color), var(--accent-color-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.chapter-hero p {
  font-size: 1.1rem;
  max-width: 800px;
  margin: 0 auto 30px;
  color: var(--secondary-text);
}

.solver-container {
  background-color: var(--card-bg);
  border-radius: 10px;
  padding: 30px;
  margin-bottom: 40px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.solver-tabs {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.solver-tab {
  padding: 10px 20px;
  cursor: pointer;
  font-weight: 500;
  color: var(--secondary-text);
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
}

.solver-tab.active {
  color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
}

.solver-content {
  display: none;
}

.solver-content.active {
  display: block;
  animation: fadeIn 0.5s;
}

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

.learning-mode {
  margin-bottom: 30px;
}

.example-problem {
  background-color: var(--secondary-bg);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.example-problem h3 {
  color: var(--accent-color);
  margin-bottom: 15px;
  font-size: 1.2rem;
}

.solution-steps {
  margin-top: 20px;
}

.step {
  padding: 15px;
  margin-bottom: 15px;
  border-left: 3px solid var(--accent-color);
  background-color: rgba(0, 255, 255, 0.05);
  border-radius: 0 8px 8px 0;
  transition: all 0.3s;
  opacity: 0;
  transform: translateX(-20px);
}

.step.visible {
  opacity: 1;
  transform: translateX(0);
}

.step-number {
  font-weight: 700;
  color: var(--accent-color);
  margin-right: 10px;
}

.practice-mode {
  margin-bottom: 30px;
}

.input-container {
  margin-bottom: 20px;
}

.input-container label {
  display: block;
  margin-bottom: 10px;
  color: var(--secondary-text);
}

.problem-input {
  width: 100%;
  padding: 15px;
  background-color: var(--secondary-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--primary-text);
  font-family: 'Poppins', sans-serif;
  resize: vertical;
  min-height: 100px;
}

.solve-btn {
  background: linear-gradient(to right, var(--accent-color), var(--accent-color-2));
  color: #fff;
  border: none;
  padding: 12px 25px;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.solve-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 255, 255, 0.3);
}

.solve-btn i {
  margin-right: 8px;
}

.solution-result {
  margin-top: 30px;
  padding: 20px;
  background-color: var(--secondary-bg);
  border-radius: 8px;
  display: none;
}

.solution-result.visible {
  display: block;
  animation: slideDown 0.5s;
}

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

.math-formula {
  font-family: 'Cambria Math', serif;
  font-size: 1.1rem;
  line-height: 1.8;
}

.formula-animation {
  display: flex;
  justify-content: center;
  margin: 30px 0;
  height: 200px;
  position: relative;
}

.formula-animation svg {
  max-width: 100%;
  height: auto;
}

.related-concepts {
  margin-top: 40px;
}

.related-concepts h3 {
  color: var(--accent-color);
  margin-bottom: 20px;
  font-size: 1.3rem;
}

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

.concept-card {
  background-color: var(--secondary-bg);
  padding: 15px;
  border-radius: 8px;
  transition: all 0.3s;
}

.concept-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--border-glow);
}

.concept-card h4 {
  color: var(--accent-color-2);
  margin-bottom: 10px;
  font-size: 1.1rem;
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
  .chapter-hero h1 {
    font-size: 1.8rem;
  }
  
  .chapter-hero p {
    font-size: 1rem;
  }
  
  .solver-tabs {
    flex-direction: column;
  }
  
  .solver-tab {
    padding: 10px 0;
    border-bottom: none;
    border-left: 2px solid transparent;
    padding-left: 10px;
  }
  
  .solver-tab.active {
    border-bottom: none;
    border-left: 2px solid var(--accent-color);
  }
  
  .concepts-grid {
    grid-template-columns: 1fr;
  }
}