.form-container {
  max-width: 700px;
  margin: auto;
  padding: 20px;
  background: #f9f9f9;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.logo {
  width: 70px;
  height: 70px;
  position: absolute;
  top: 20px;
  left: 20px;
}
fieldset {
  border: 1px solid #ccc;
  padding: 15px;
  margin-bottom: 20px;
}
.required {
  color: red;
  margin-left: 2px;
  font-weight: bold;
}
legend {
  font-weight: bold;
}
label {
  display: block;
  margin-top: 10px;
  font-weight: 500;
}
input, select, textarea {
  width: 100%;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
input:required:invalid, select:required:invalid, textarea:required:invalid {
  border-color: #e74c3c;
}
button {
  background: #007bff;
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
}
.group-selection {
  display: flex;
  gap: 24px;
  margin-top: 8px;
  margin-bottom: 10px;
}
.group-selection label {
  display: flex;
  align-items: center;
  font-weight: 500;
  gap: 6px;
}
.performance-tables {
  display: flex;
  gap: 32px;
  justify-content: flex-start;
  flex-wrap: wrap;
}
.perf-table {
  border-collapse: collapse;
  min-width: 270px;
  margin-bottom: 10px;
  background: #fff;
}
.perf-table caption {
  font-weight: bold;
  margin-bottom: 4px;
  text-align: center;
  caption-side: top;
}
.perf-table th, .perf-table td {
  border: 1px solid #333;
  padding: 6px 10px;
  text-align: center;
  font-size: 1rem;
  position: relative;
  vertical-align: middle;
}
.perf-table th {
  background: #f3f3f3;
  font-weight: bold;
}
.perf-table input[type="text"] {
  width: 90px;
  padding: 4px 6px;
  font-size: 1rem;
  border: 1px solid #bbb;
  border-radius: 3px;
  text-align: center;
}
.perf-table input[type="number"] {
  width: 80px;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
  padding: 4px 6px;
  font-size: 1rem;
  border: 1px solid #bbb;
  border-radius: 3px;
  text-align: center;
  margin: 0;
  background: #fff;
}
.perf-input-cell {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}
@media (max-width: 700px) {
  .performance-tables {
    flex-direction: column;
    gap: 16px;
  }
  .perf-table {
    min-width: unset;
    width: 100%;
  }
}