:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1a1d22;
  --muted: #5f6673;
  --line: #d7dde6;
  --accent: #0c6e62;
  --danger: #b3261e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 0%, #eaf9f6, #f4f5f7 40%);
}

.inner {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.topbar {
  border-bottom: 1px solid var(--line);
  background: #ffffffd9;
  backdrop-filter: blur(5px);
}

.topbar .inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
}

.brand {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

nav {
  display: flex;
  gap: 12px;
  align-items: center;
}

a {
  color: var(--accent);
}

main.inner {
  padding: 24px 0 48px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 18px;
}

.narrow {
  max-width: 640px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.full {
  grid-column: 1 / -1;
}

.stack {
  display: grid;
  gap: 8px;
}

label {
  font-size: 0.9rem;
  color: var(--muted);
}

input,
select,
textarea,
button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  font: inherit;
}

button {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

button.danger {
  background: var(--danger);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 10px 6px;
  vertical-align: top;
}

pre {
  background: #f8fafc;
  border: 1px solid var(--line);
  padding: 12px;
  border-radius: 10px;
  overflow-x: auto;
  white-space: pre-wrap;
}

.ok {
  color: #12643b;
}

.err {
  color: var(--danger);
}

.inline {
  width: auto;
}

.thread {
  border-top: 1px solid var(--line);
  margin-top: 12px;
  padding-top: 12px;
}

@media (max-width: 840px) {
  .grid {
    grid-template-columns: 1fr;
  }
}