* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background: #e5e5e5;
  margin: 0;
  padding: 20px;
}

.app {
  width: 360px;
  margin: auto;
  background: #f7f7f7;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  overflow: hidden;
}

.header {
  background: linear-gradient(#444, #111);
  color: white;
  text-align: center;
  padding: 15px;
  font-weight: bold;
  font-size: 18px;
}

.content {
  padding: 20px;
}

label {
  display: block;
  margin-top: 12px;
  margin-bottom: 5px;
  font-size: 14px;
  color: #333;
}


input, select {
  width: 100%;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 14px;
}


button {
  width: 100%;
  padding: 12px;
  margin-top: 15px;
  border-radius: 6px;
  border: none;
  font-size: 16px;
  cursor: pointer;
}

button.primary {
  background: #ffffff;
  border: 1px solid #ccc;
  font-weight: bold;
}

button.secondary {
  background: #ffffff;
  border: 1px solid #ccc;
  font-weight: bold;
}


.keypad {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.keypad button {
  padding: 15px;
  font-size: 18px;
  background: white;
  border: 1px solid #ccc;
  border-radius: 6px;
}


.keypad .delete {
  background: #ddd;
  grid-column: span 2;
}


.exercise-list {
  margin-top: 20px;
  background: #eee;
  padding: 15px;
  border-radius: 6px;
  font-size: 14px;
}

.exercise-list p {
  margin: 5px 0;
}


.submit-btn {
  margin-top: 10px;
  background: #fff;
  border: 1px solid #aaa;
  font-weight: bold;
}

.keypad {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.keypad button {
  padding: 15px;
  font-size: 18px;
  background: white;
  border: 1px solid #ccc;
  border-radius: 6px;
  cursor: pointer;
}

.keypad button:active {
  background: #ddd;
}

.keypad .delete {
  grid-column: span 2;
  background: #e0e0e0;
}