body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  margin: 0;
  background: #f7f8fc;
  color: #1f2330;
}
.container {
  max-width: 860px;
  margin: 32px auto;
  padding: 0 16px 40px;
}
.subtitle { color: #5f6681; margin-top: -6px; }
.card {
  background: white;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 6px 24px rgba(20, 28, 64, 0.08);
  margin-bottom: 18px;
}
.stack { display: grid; gap: 10px; }
input, textarea, button {
  font: inherit;
}
input, textarea {
  border: 1px solid #d6dbf3;
  border-radius: 10px;
  padding: 10px 12px;
}
button {
  width: fit-content;
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  background: #4f67ff;
  color: white;
}
.thread-list, .reply-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.thread-list li, .reply-list li {
  background: #fff;
  border: 1px solid #e7eaf8;
  border-radius: 10px;
  padding: 12px;
}
a { color: #304ad6; text-decoration: none; }
a:hover { text-decoration: underline; }
.meta { color: #68708f; font-size: 0.92rem; margin-top: 4px; }
.body { white-space: pre-wrap; line-height: 1.45; }