:root {
  color-scheme: light dark;

  --bg: #f5f6f8;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #16181d;
  --muted: #626873;
  --accent: #2f6feb;
  --accent-text: #ffffff;
  --danger: #c0392b;
  --code-bg: #f0f2f5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1114;
    --surface: #171a1f;
    --border: #272c34;
    --text: #e7eaee;
    --muted: #939aa5;
    --accent: #5b8dff;
    --accent-text: #0f1114;
    --danger: #ff7a6b;
    --code-bg: #1e222a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 48px 20px 64px;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.shell { max-width: 680px; margin: 0 auto; }

.head { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }

.mark {
  width: 34px; height: 34px; flex: none; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #7aa2ff);
}

h1 { font-size: 20px; font-weight: 600; margin: 0; letter-spacing: -0.01em; }
.sub { margin: 2px 0 0; font-size: 13px; color: var(--muted); }

.form { margin-bottom: 18px; }

.label {
  display: block; font-size: 12px; font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 8px;
}

.field { display: flex; gap: 8px; }

.input {
  flex: 1; min-width: 0;
  padding: 11px 14px;
  font: 15px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 9px;
  outline: none; transition: border-color .15s, box-shadow .15s;
}
.input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgb(47 111 235 / 0.16); }
.input.invalid { border-color: var(--danger); box-shadow: 0 0 0 3px rgb(192 57 43 / 0.14); }

.go {
  padding: 11px 20px; font: 600 14px/1.4 inherit;
  color: var(--accent-text); background: var(--accent);
  border: 0; border-radius: 9px; cursor: pointer;
  transition: filter .15s;
}
.go:hover { filter: brightness(1.07); }
.go:active { filter: brightness(0.94); }

.hint { margin: 9px 2px 0; font-size: 13px; color: var(--muted); min-height: 20px; }
.hint.error { color: var(--danger); }

.examples { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 32px; }
.examples-label { font-size: 12px; color: var(--muted); margin-right: 2px; }

.chip {
  padding: 5px 11px; font: 13px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--muted); background: var(--surface);
  border: 1px solid var(--border); border-radius: 999px; cursor: pointer;
  transition: color .15s, border-color .15s;
}
.chip:hover { color: var(--accent); border-color: var(--accent); }

.panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 22px; margin-bottom: 16px;
}
.panel h2 { font-size: 14px; font-weight: 600; margin: 0 0 10px; }
.panel h2 + ul { margin-top: 0; }
.panel h2:not(:first-child) { margin-top: 20px; }
.panel p { margin: 0 0 12px; }
.panel p:last-child { margin-bottom: 0; }

.list { margin: 0; padding-left: 20px; }
.list li { margin-bottom: 6px; }
.list li:last-child { margin-bottom: 0; }

.muted { color: var(--muted); }

pre {
  margin: 0 0 12px; padding: 12px 14px; overflow-x: auto;
  background: var(--code-bg); border-radius: 8px;
}
pre code { font-size: 13px; }

code {
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg); padding: 1px 5px; border-radius: 4px;
}
pre code { background: none; padding: 0; }

.foot { margin-top: 24px; text-align: center; }
.status { font-size: 12px; color: var(--muted); }
.status.ok::before { content: "\25CF"; color: #2ea043; margin-right: 6px; }
.status.down::before { content: "\25CF"; color: var(--danger); margin-right: 6px; }