* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  color: #1f2937;
}

main {
  min-height: 100vh;
  padding: 32px 16px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.panel {
  width: 100%;
  max-width: 800px;
  background: white;
  border: 1px solid #d9dee5;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

h1 {
  margin: 0 0 24px;
  font-size: 28px;
  color: #111827;
}

h2 {
  margin: 32px 0 12px;
  font-size: 20px;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 8px;
}

h3 {
  margin: 24px 0 8px;
  font-size: 17px;
  color: #374151;
}

label {
  display: block;
  margin: 16px 0 6px;
  font-weight: 700;
  font-size: 14px;
}

input,
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font: inherit;
  background: white;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

button {
  margin-top: 18px;
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  background: #2563eb;
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

button:active {
  transform: translateY(1px);
}

#feedback-list,
#response-list {
  margin-top: 12px;
  padding-left: 20px;
}

#feedback-list li,
#response-list li {
  margin: 8px 0;
  padding: 10px 12px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  line-height: 1.4;
}

br {
  display: none;
}