:root {
  color-scheme: dark;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  background: #0e1116;
  color: #eef2f8;

  --accent: #6fb6ff;
  --muted: #a3b0c2;
  --line: #242b36;
  --code-bg: #151920;
  --ok: #69d39b;
  --err: #ff9a91;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  padding: 56px 32px;
}

main {
  width: min(760px, 100%);
  margin: 0 auto;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 6.4vw, 62px);
  font-weight: 760;
  letter-spacing: -0.02em;
  line-height: 0.98;
  overflow-wrap: anywhere;
}

p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

section {
  margin-top: 72px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 18px;
  font-size: 22px;
}

h3 {
  margin: 28px 0 10px;
  color: var(--accent);
  font-size: 14px;
  text-transform: uppercase;
}

pre {
  overflow-x: auto;
  margin: 0 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--code-bg);
  padding: 16px;
}

code {
  color: #eef2f8;
  font-family: var(--mono);
  font-size: 14px;
}

p code,
dd code {
  color: var(--accent);
}

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

dl {
  display: grid;
  grid-template-columns: minmax(120px, 190px) 1fr;
  gap: 12px 20px;
  margin: 0;
}

dt {
  color: #eef2f8;
  font-family: var(--mono);
  font-size: 14px;
}

dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

/* --------------------------------------------------------- playground */

.pg {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--code-bg);
  padding: 18px;
}

.pg-label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pg-label em {
  color: var(--accent);
  font-style: normal;
  letter-spacing: 0;
  text-transform: none;
}

.pg select,
.pg textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0e1116;
  color: #eef2f8;
  font-family: var(--mono);
  font-size: 14px;
  padding: 9px 10px;
}

.pg select {
  margin-bottom: 18px;
}

.pg textarea {
  margin-bottom: 18px;
  resize: vertical;
  line-height: 1.5;
}

.pg-input {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0e1116;
  padding: 0 10px;
}

.pg-input:focus-within {
  border-color: var(--accent);
}

.caret {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
}

.pg-input input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  color: #eef2f8;
  font-family: var(--mono);
  font-size: 15px;
  padding: 11px 0;
}

.pg-out {
  margin-bottom: 18px;
}

.pg-out pre {
  margin: 0;
  background: #0e1116;
  color: var(--muted);
}

#result-output {
  color: var(--ok);
  font-size: 15px;
}

#result-output.err {
  color: var(--err);
}

#result-output.idle {
  color: var(--muted);
}

.pg-check {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #eef2f8;
  font-size: 14px;
  cursor: pointer;
}

.pg-check input {
  accent-color: var(--accent);
  margin: 0;
  cursor: pointer;
}

.pg-check.disabled {
  color: var(--muted);
  cursor: not-allowed;
}

.pg-check.disabled input {
  cursor: not-allowed;
}

.pg-note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.pg-note:empty {
  display: none;
}

.status {
  margin: 12px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
}

@media (max-width: 560px) {
  body {
    padding: 40px 20px;
  }

  dl {
    grid-template-columns: 1fr;
  }

  dd {
    margin-bottom: 8px;
  }
}