/* Global Styles */
:root {
  --primary-color: #2196f3;
  --secondary-color: #ffc107;
  --text-color: #333;
  --background-color: #f5f5f5;
  --card-background: #ffffff;
}

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
}

/* Landing Page */
.landing-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
}

.landing-content {
  text-align: center;
  max-width: 1200px;
  width: 100%;
}

h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.feature-card {
  background: var(--card-background);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-card i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 5px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn-primary:hover {
  background-color: #1976d2;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--card-background);
  padding: 2rem;
  border-radius: 10px;
  width: 90%;
  max-width: 500px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="tel"] {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
}

/* Result Panel */
.result-panel {
  position: fixed;
  left: 20px;
  top: 20px;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  width: 350px;
  max-height: 80vh;
  overflow-y: auto;
}

.result-panel h3 {
  color: var(--primary-color);
  margin-bottom: 15px;
}

.route-option {
  background: #f8f9fa;
  padding: 15px;
  margin-bottom: 15px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.route-option:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.route-option h4 {
  color: var(--primary-color);
  margin-bottom: 10px;
}

.route-option p {
  margin: 5px 0;
  font-size: 0.9rem;
  color: #666;
}

/* Graph Container */
#graphContainer {
  display: none;
  width: 100%;
  height: 100vh;
  background: white;
}

/* Route Selection Panel */
.route-panel {
  position: fixed;
  right: 20px;
  top: 20px;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  width: 300px;
  z-index: 1000;
}

.route-panel h3 {
  color: var(--primary-color);
  margin-bottom: 15px;
}

.route-panel select {
  width: 100%;
  padding: 12px;
  margin-bottom: 15px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
  background: white;
}

.route-panel select:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .modal-content {
    width: 95%;
    margin: 10px;
  }

  .route-panel,
  .result-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    width: 100%;
    max-height: 50vh;
    border-radius: 10px 10px 0 0;
  }

  #graphContainer {
    height: 50vh;
  }
}