/* Reset some default styles */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #e9f0f7;
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  align-items: flex-start;
}

.container {
  background: #fff;
  max-width: 600px;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  padding: 30px 40px;
}

h2 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 25px;
  font-weight: 700;
  letter-spacing: 1px;
}

form {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 30px;
}

input[type='text'],
input[type='number'],
select {
  flex: 1 1 100%;
  padding: 12px 15px;
  border: 2px solid #d1d9e6;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

input[type='text']:focus,
input[type='number']:focus,
select:focus {
  border-color: #4caf50;
  outline: none;
  box-shadow: 0 0 8px rgba(76, 175, 80, 0.3);
}

input[type='submit'] {
  background-color: #4caf50;
  color: white;
  border: none;
  padding: 14px 0;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  flex: 1 1 100%;
  transition: background-color 0.3s ease;
}

input[type='submit']:hover {
  background-color: #43a047;
}

table {
  width: 100%;
  border-collapse: collapse;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  border-radius: 12px;
  overflow: hidden;
}

thead {
  background-color: #4caf50;
  color: white;
}

th,
td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid #e0e0e0;
  font-size: 1rem;
}

tbody tr:hover {
  background-color: #f1f9f1;
}

tfoot td {
  font-weight: 700;
  font-size: 1.1rem;
  background-color: #f9f9f9;
  border-top: 2px solid #4caf50;
}

.delete-btn {
  background: #ff4757;
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
}

.delete-btn:hover {
  background: #ff3742;
}

/* Responsive */
@media (min-width: 600px) {

  form input[type='text'],
  form select,
  form input[type='number'] {
    flex: 1 1 calc(33.333% - 10px);
  }

  form input[type='submit'] {
    flex: 1 1 100%;
  }
}