:root {
  --bg: #ffffff;
  --surface: #f7f7f8;
  --border: #e4e4e7;
  --text: #18181b;
  --text-secondary: #52525b;
  --accent: #1d4ed8;
  --accent-border: #bfdbfe;
}

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

html {
  font-size: 16px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

header.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.brand {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.brand:hover {
  text-decoration: none;
}

nav.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

nav.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

nav.site-nav a:hover {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.badge {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 2px 10px;
  border: 1px dashed var(--accent);
  color: var(--accent);
  border-radius: 999px;
  background: transparent;
}

main {
  padding: 56px 0 64px;
}

h1 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 16px 0 16px;
}

h2 {
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 48px 0 12px;
  scroll-margin-top: 24px;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 28px 0 8px;
}

p {
  margin: 12px 0;
  color: var(--text-secondary);
}

p.lead {
  font-size: 1.15rem;
  color: var(--text);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

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

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

ul, ol {
  margin: 12px 0 12px 24px;
  color: var(--text-secondary);
}

li {
  margin: 6px 0;
}

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

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

.notice {
  border: 1px solid var(--accent-border);
  background: #eff6ff;
  border-radius: 8px;
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 0.92rem;
}

.notice code {
  background: #ffffff;
}

.status-line {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 32px 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.flow-step {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.92rem;
}

.flow-step:last-child {
  border-bottom: none;
}

.flow-step .step-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 4px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 24px 0;
}

@media (min-width: 720px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  background: var(--surface);
}

.card h3 {
  margin-top: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.card p {
  font-size: 0.88rem;
  margin: 8px 0;
}

.meta {
  display: block;
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.task-type {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin: 24px 0;
}

.task-type h3 {
  margin-top: 0;
}

.task-type dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px 16px;
  margin: 16px 0;
}

@media (min-width: 720px) {
  .task-type dl {
    grid-template-columns: 140px 1fr;
  }
}

.task-type dt {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-top: 2px;
}

.task-type dd {
  color: var(--text);
  font-size: 0.95rem;
}

.task-type dd code {
  display: inline-block;
  margin: 2px 4px 2px 0;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 48px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

footer.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

footer.site-footer a {
  color: var(--text-secondary);
}

footer.site-footer a:hover {
  color: var(--text);
}