* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, "Segoe UI", Arial, sans-serif;
  background: #f2f4f8;
  margin: 0;
  padding: 2rem 1rem;
  color: #1f2933;
}

.card {
  max-width: 640px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem 2rem 2rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

h1 {
  margin-top: 0;
  font-size: 1.5rem;
}

.desc {
  color: #52606d;
  line-height: 1.5;
}

.step {
  border-top: 1px solid #e4e7eb;
  padding-top: 1rem;
  margin-top: 1rem;
}

h2 {
  font-size: 1.05rem;
  margin: 0 0 0.75rem;
}

button {
  background: #3b82f6;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover {
  background: #2563eb;
}

button:disabled {
  background: #9db2ce;
  cursor: not-allowed;
}

textarea {
  width: 100%;
  border: 1px solid #cbd2d9;
  border-radius: 8px;
  padding: 0.6rem;
  font-size: 0.95rem;
  resize: vertical;
  margin-bottom: 0.75rem;
}

.hint {
  font-size: 0.85rem;
  color: #7b8794;
}

code {
  background: #eef2f7;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0.75rem;
}

th, td {
  border: 1px solid #e4e7eb;
  padding: 0.5rem;
  text-align: left;
  font-size: 0.9rem;
}

th {
  background: #f7f9fc;
}

.status {
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: #2f855a;
}