* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: #0d1117;
  color: #c9d1d9;
  line-height: 1.7;
}

a {
  color: #2ea043;
  text-decoration: none;
}

a:hover {
  color: #3fb950;
  text-decoration: underline;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ── nav ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid #21262d;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 12px;
}

nav .logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: #f0f6fc;
}

nav .logo::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #238636;
  margin-right: 8px;
  vertical-align: middle;
  margin-top: -2px;
}

nav .links {
  display: flex;
  gap: 20px;
}

nav .links a {
  color: #8b949e;
}

nav .links a:hover {
  color: #c9d1d9;
  text-decoration: none;
}

/* ── header ── */
header {
  text-align: center;
  padding: 60px 0 40px;
}

header h1 {
  font-size: 3rem;
  font-weight: 800;
  color: #f0f6fc;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

header p {
  font-size: 1.15rem;
  color: #8b949e;
  max-width: 600px;
  margin: 0 auto;
}

.badge {
  display: inline-block;
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 20px;
  padding: 4px 14px;
  font-size: .8rem;
  color: #8b949e;
  margin: 12px 4px;
}

.badge b {
  color: #2ea043;
}

.top-links {
  margin-top: 24px;
}

.top-links a {
  display: inline-block;
  background: #238636;
  color: #fff;
  padding: 10px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: .95rem;
  text-decoration: none;
  margin: 0 6px;
  transition: background .15s;
}

.top-links a:hover {
  background: #2ea043;
  text-decoration: none;
  color: #fff;
}

.top-links a.alt {
  background: transparent;
  border: 1px solid #30363d;
  color: #c9d1d9;
}

.top-links a.alt:hover {
  background: #161b22;
  border-color: #2ea043;
  color: #2ea043;
}

/* ── page titles ── */
h1 {
  font-size: 2rem;
  color: #f0f6fc;
  margin-bottom: 8px;
}

.subtitle {
  color: #8b949e;
  margin-bottom: 32px;
}

/* ── sections ── */
section {
  margin: 48px 0;
}

section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #f0f6fc;
  border-left: 3px solid #238636;
  padding-left: 12px;
}

section h3 {
  font-size: 1.15rem;
  color: #e6edf3;
  margin: 20px 0 8px;
}

section p,
section li {
  color: #8b949e;
  font-size: .92rem;
}

section ul {
  padding-left: 20px;
  margin: 8px 0;
}

section li {
  margin-bottom: 4px;
}

section code {
  font-size: .85em;
  background: #161b22;
  padding: 2px 6px;
  border-radius: 4px;
  color: #d2a8ff;
}

/* ── cards ── */
.card {
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.1rem;
  color: #f0f6fc;
  margin-bottom: 8px;
}

.card h4 {
  color: #f0f6fc;
  margin-bottom: 6px;
  font-size: 1rem;
}

.card p,
.card li {
  color: #8b949e;
  font-size: .92rem;
}

.card ul {
  padding-left: 20px;
  margin-top: 6px;
}

.card li {
  margin-bottom: 4px;
}

/* ── flow ── */
.flow {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin: 20px 0;
}

.flow .step {
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: .85rem;
  color: #c9d1d9;
  text-align: center;
  flex: 1;
  min-width: 100px;
}

.flow .arrow {
  color: #30363d;
  font-size: 1.2rem;
  flex: 0;
}

/* ── code ── */
pre {
  background: #0d1117;
  border: 1px solid #21262d;
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-size: .84rem;
  line-height: 1.6;
  color: #c9d1d9;
  margin: 12px 0;
}

pre .k {
  color: #2ea043;
}

pre .s {
  color: #a5d6ff;
}

pre .n {
  color: #d2a8ff;
}

pre .c {
  color: #484f58;
}

/* ── try ── */
.try {
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
}

.try textarea {
  width: 100%;
  min-height: 120px;
  background: #0d1117;
  border: 1px solid #30363d;
  border-radius: 8px;
  color: #c9d1d9;
  font-family: 'Cascadia Code', Consolas, monospace;
  font-size: .85rem;
  padding: 12px;
  resize: vertical;
}

.try .row {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.try select,
.try button {
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid #30363d;
  font-size: .9rem;
}

.try select {
  background: #0d1117;
  color: #c9d1d9;
  flex: 1;
  min-width: 140px;
}

.try button {
  background: #238636;
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
  min-width: 140px;
  transition: background .15s;
}

.try button:hover {
  background: #2ea043;
}

.try button:disabled {
  opacity: .5;
  cursor: not-allowed;
}

#result {
  margin-top: 16px;
  min-height: 60px;
}

/* ── toc ── */
.toc {
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 40px;
}

.toc h2 {
  font-size: 1.15rem;
  color: #f0f6fc;
  margin-bottom: 12px;
}

.toc ol {
  padding-left: 20px;
  color: #8b949e;
  font-size: .9rem;
  line-height: 2;
}

.toc ol a {
  color: #2ea043;
}

/* ── tables ── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: .88rem;
}

thead {
  background: #161b22;
}

th,
td {
  text-align: left;
  padding: 10px 14px;
  border: 1px solid #21262d;
}

th {
  color: #f0f6fc;
  font-weight: 600;
}

td {
  color: #8b949e;
}

td code {
  color: #d2a8ff;
  background: #0d1117;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: .82rem;
}

.tag {
  display: inline-block;
  background: #161b22;
  color: #2ea043;
  border: 1px solid #1a3325;
  border-radius: 4px;
  padding: 1px 6px;
  font-size: .78rem;
  margin-left: 6px;
}

/* ── footer ── */
footer {
  text-align: center;
  color: #484f58;
  font-size: .8rem;
  padding: 40px 0 24px;
  border-top: 1px solid #21262d;
  margin-top: 48px;
}

footer a {
  color: #8b949e;
}

footer a:hover {
  color: #2ea043;
}