:root {
  --ink: #1a2330;
  --muted: #5a6573;
  --line: #c9d2dc;
  --panel: #f4f7fa;
  --accent: #0b5f8a;
  --code: #0e1620;
  --code-bg: #eef2f6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #d9e8f2 0%, transparent 55%),
    linear-gradient(180deg, #f8fafc 0%, #eef2f6 100%);
  min-height: 100vh;
}

header, main, footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0;
}

.brand {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

h1 {
  margin: 0.2rem 0 0.4rem;
  font-family: "IBM Plex Serif", Georgia, serif;
  font-weight: 600;
  font-size: 2rem;
}

.lede { margin: 0 0 1rem; color: var(--muted); }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1rem 1.1rem 1.15rem;
  margin-bottom: 1rem;
}

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

.panel h3 {
  margin: 1rem 0 0.4rem;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 600;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: end;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--muted);
}

input, select, textarea, button {
  font: inherit;
}

input, select, textarea {
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0.4rem 0.5rem;
  background: #fff;
  color: var(--ink);
  min-width: 8rem;
}

input.wide { min-width: 22rem; }

textarea {
  width: 100%;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.85rem;
  line-height: 1.4;
}

.actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

button {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 3px;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
}

button:hover { filter: brightness(1.05); }

.code {
  margin: 0;
  padding: 0.75rem;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.8rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--code);
  min-height: 3rem;
}

footer {
  padding-bottom: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.muted { color: var(--muted); }
.small { font-size: 0.8rem; margin: 0.4rem 0 0; }
button.inline { margin-top: 1.1rem; }

.table-wrap { margin-top: 0.85rem; overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  background: #fff;
}
th, td {
  border: 1px solid var(--line);
  padding: 0.35rem 0.5rem;
  text-align: left;
}
th { background: #e8eef3; }
td button {
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
}

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