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

body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

#datetime {
  text-align: center;
  margin-bottom: 20px;
  font-size: 1.2em;
}

form {
  display: flex;
  flex-direction: column;
}

.input-group {
  margin-bottom: 15px;
}

label {
  margin-bottom: 5px;
  font-weight: bold;
}

input {
  margin-bottom: 10px;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  width: 100%;
}

button {
  padding: 10px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #218838;
}

.charts {
  margin-top: 30px;
}

canvas {
  margin-bottom: 20px;
}

.share-button {
  display: block;
  margin: 20px auto;
  background-color: #007bff;
}

.share-button:hover {
  background-color: #0056b3;
}

#forehandLinks, #backhandLinks, #serveLinks, #volleyLinks, #overheadLinks {
  margin-bottom: 20px;
}

#forehandLinks a, #backhandLinks a, #serveLinks a, #volleyLinks a, #overheadLinks a {
  color: #007bff;
  text-decoration: none;
}

#forehandLinks a:hover, #backhandLinks a:hover, #serveLinks a:hover, #volleyLinks a:hover, #overheadLinks a:hover {
  text-decoration: underline;
}