:root {
  color-scheme: light;
  --ink: #16201d;
  --muted: #5d6965;
  --line: #cfd8d3;
  --paper: #fbfbf7;
  --panel: #ffffff;
  --accent: #2f6f5e;
  --accent-strong: #194b40;
  --warn: #8a5a12;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  background:
    linear-gradient(90deg, rgba(22, 32, 29, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(22, 32, 29, 0.04) 1px, transparent 1px),
    var(--paper);
  background-size: 24px 24px;
  color: var(--ink);
}

.page {
  width: min(960px, calc(100% - 32px));
  margin: 32px auto;
  padding: 28px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  box-shadow: 0 18px 42px rgba(22, 32, 29, 0.08);
}

.masthead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

h1,
h2 {
  margin: 0;
  line-height: 1.2;
}

h1 {
  font-size: clamp(28px, 4vw, 42px);
}

h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.topnav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.ask-form,
.toolbar,
.panel,
.answer,
.feedback-form {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 18px;
  margin-top: 18px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
}

textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--line);
  padding: 12px;
  font: inherit;
  color: var(--ink);
  background: #fffefb;
}

select {
  width: min(280px, 100%);
  border: 1px solid var(--line);
  padding: 10px;
  font: inherit;
  color: var(--ink);
  background: #fffefb;
}

fieldset {
  margin: 0 0 14px;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 8px;
  font-weight: 800;
}

.inline-choice {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 16px;
  font-weight: 600;
}

button {
  margin-top: 12px;
  border: 0;
  background: var(--accent-strong);
  color: #fff;
  padding: 10px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--accent);
}

pre {
  white-space: pre-wrap;
  margin: 0;
  background: #f1f4ef;
  border-left: 4px solid var(--accent);
  padding: 16px;
  line-height: 1.65;
}

.answer-meta,
.notice {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--muted);
}

.notice {
  color: var(--warn);
  font-weight: 700;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 0;
}

.status-grid div {
  border: 1px solid var(--line);
  padding: 12px;
  background: #fffefb;
}

dt {
  color: var(--muted);
  font-size: 13px;
}

dd {
  margin: 4px 0 0;
  font-weight: 800;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th,
.data-table td {
  border: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #f1f4ef;
  color: var(--muted);
  font-weight: 800;
}

.empty-state {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 640px) {
  .page {
    width: 100%;
    margin: 0;
    min-height: 100vh;
    padding: 20px;
    border-left: 0;
    border-right: 0;
  }

  .masthead {
    display: block;
  }

  .topnav {
    justify-content: flex-start;
    margin-top: 12px;
  }
}