*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #000;
  --surface: #111;
  --border: #333;
  --text: #fff;
  --muted: #b3b3b3;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0 auto;
  padding: clamp(16px, 4vw, 40px);
  max-width: 960px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica Neue, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-wrap: break-word;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  line-height: 1.15;
}

h2 {
  margin: 36px 0 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: clamp(1.1rem, 3vw, 1.3rem);
}

h3 {
  margin: 20px 0 4px;
  font-size: 1rem;
}

p,
li {
  color: var(--muted);
  font-size: 0.98rem;
}

p {
  margin: 0 0 12px;
}

ul,
ol {
  margin: 0 0 12px;
  padding-left: 22px;
}

li {
  margin-bottom: 4px;
}

strong {
  color: var(--text);
}

.subtitle {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: 1.05rem;
}

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

code {
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.note {
  margin: 20px 0;
  padding-left: 14px;
  border-left: 3px solid var(--text);
}

.note p {
  margin: 0;
  color: var(--text);
}

/* Tabs */
[role="tablist"] {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

[role="tab"] {
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  padding: 10px 14px;
  white-space: nowrap;
}

[role="tab"][aria-selected="true"] {
  color: var(--text);
  border-bottom-color: var(--text);
}

[hidden] {
  display: none !important;
}

/* Forms */
form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 12px 16px;
}

label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.9rem;
  font-weight: 600;
}

input,
textarea,
select {
  width: 100%;
  padding: 9px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  font-size: 1rem;
}

textarea {
  min-height: 70px;
  resize: vertical;
}

:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 16px 0;
}

button.action {
  padding: 9px 16px;
  background: var(--text);
  border: 1px solid var(--text);
  border-radius: 6px;
  color: var(--bg);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}

button.action.secondary {
  background: none;
  border-color: var(--border);
  color: var(--text);
}

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

pre {
  margin: 0 0 12px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1.45;
  overflow-x: auto;
}

pre code {
  font-size: inherit;
}

pre.prompt {
  max-height: 560px;
  overflow: auto;
  white-space: pre-wrap;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
}

figure {
  margin: 0 0 16px;
}

figcaption {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

ul.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 16px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

ul.gallery li {
  margin: 0;
}

table {
  display: block;
  max-width: 100%;
  margin: 0 0 16px;
  border-collapse: collapse;
  overflow-x: auto;
}

th,
td {
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--text);
}

footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  pre {
    padding: 10px;
    font-size: 0.8rem;
  }
}