:root {
  --bg: #f4f1ea;
  --ink: #1c2430;
  --muted: #5c6570;
  --card: #fffdf8;
  --line: #d9d1c3;
  --accent: #1f6b5a;
  --accent2: #c45c26;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  padding: 28px 32px 8px;
}
h1 { margin: 0; font-size: 28px; letter-spacing: 0.04em; }
h1 span { font-weight: 500; color: var(--accent); }
.sub { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 16px 32px 40px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 22px 18px;
  box-shadow: 0 8px 24px rgba(40, 30, 10, 0.04);
}
.gate { max-width: 480px; margin: 40px auto; }
h2 { margin: 0 0 8px; font-size: 18px; }
h2 small { font-weight: 400; color: var(--muted); margin-left: 8px; }
.hint { margin: 0 0 12px; color: var(--muted); font-size: 14px; line-height: 1.55; }
textarea, input, pre {
  width: 100%;
  font: inherit;
  color: var(--ink);
}
textarea, input[type="password"] {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  background: #fff;
}
textarea { resize: vertical; line-height: 1.55; }
pre {
  min-height: 380px;
  max-height: 62vh;
  overflow: auto;
  white-space: pre-wrap;
  background: #faf7f1;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  line-height: 1.65;
  margin: 0 0 12px;
}
.row { display: flex; gap: 10px; margin-top: 12px; align-items: center; }
button {
  appearance: none;
  border: 0;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 15px;
  cursor: pointer;
}
button.ghost { background: #efe8dc; color: var(--ink); }
button:disabled { opacity: 0.55; cursor: wait; }
.foot { color: var(--accent2); font-size: 13px; margin: 10px 0 0; }
.err { color: #b42318; min-height: 1.2em; }
.hidden { display: none !important; }
@media (max-width: 900px) {
  main { grid-template-columns: 1fr; padding: 12px 16px 32px; }
  header { padding: 20px 16px 8px; flex-direction: column; align-items: flex-start; }
}