:root {
  color-scheme: light;
  --bg: #f4f6f9;
  --panel: #ffffff;
  --ink: #16191f;
  --muted: #5b6370;
  --line: #d9dee5;
  --accent: #2457d6;
  --accent-ink: #ffffff;
  --code-bg: #f0f3f7;
  --error: #b42318;
  --warning-bg: #fff6e0;
  --warning-ink: #7a4b00;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #101216;
    --panel: #181b21;
    --ink: #eceef2;
    --muted: #a1a8b3;
    --line: #2b3039;
    --accent: #7aa2ff;
    --accent-ink: #0d1424;
    --code-bg: #20242c;
    --error: #ff8a80;
    --warning-bg: #3a2c0c;
    --warning-ink: #ffd27a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 var(--sans);
}

[hidden] {
  display: none !important;
}

.shell {
  width: min(760px, 100% - 32px);
  margin: 0 auto;
  padding: 40px 0 64px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 6px 0 8px;
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1.15;
}

h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

h3 {
  margin: 20px 0 6px;
  font-size: 14px;
}

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

.small {
  font-size: 13px;
}

.strong {
  margin: 0;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.panel,
.card {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.stack {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 4px;
  font-weight: 600;
}

input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: inherit;
  font: inherit;
}

button {
  padding: 9px 16px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button.ghost {
  background: transparent;
  color: var(--accent);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.between {
  justify-content: space-between;
  gap: 12px;
}

.gap {
  gap: 10px;
  margin: 12px 0;
}

.token-box,
.snippet {
  margin: 0 0 8px;
  padding: 12px;
  border-radius: 8px;
  background: var(--code-bg);
  font: 13px/1.5 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.token-box {
  margin-bottom: 10px;
  font-size: 14px;
}

.error {
  margin: 12px 0 0;
  color: var(--error);
}

.warning {
  margin: 12px 0 0;
  padding: 12px 14px;
  border-radius: 8px;
  background: var(--warning-bg);
  color: var(--warning-ink);
}