/* --- Custom properties --------------------------------------------------- */

:root {
  --color-fg: #111;
  --color-bg: #fff;
  --color-link: #0055aa;
  --color-muted: #666;
  --color-code-bg: #f5f5f5;
  --color-border: #ddd;
  --color-focus: #0055aa;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-fg: #ddd;
    --color-bg: #111;
    --color-link: #6ba3d6;
    --color-muted: #999;
    --color-code-bg: #1a1a1a;
    --color-border: #333;
    --color-focus: #6ba3d6;
  }
}

/* --- Reset + base typography --------------------------------------------- */

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--color-fg);
  background: var(--color-bg);
  max-inline-size: 640px;
  margin-inline: auto;
  padding-block: var(--space-xl);
  padding-inline: var(--space-md);
  line-height: 1.6;
}

/* --- Shared elements ----------------------------------------------------- */

a {
  color: var(--color-link);
  text-underline-offset: 0.15em;
}

a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

h1 {
  font-size: 1.4rem;
  margin-block-end: var(--space-xs);
}

h2 {
  font-size: 1.1rem;
  margin-block: var(--space-lg) var(--space-sm);
}

time {
  color: var(--color-muted);
  font-size: 0.85em;
}

nav {
  margin-block-start: var(--space-xl);
  font-size: 0.85rem;
  color: var(--color-muted);
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* --- Index: description, node/post lists --------------------------------- */

p.desc {
  color: var(--color-muted);
  margin-block-end: var(--space-lg);
}

main ul {
  list-style: none;
}

main ul li {
  margin-block-end: 0.4rem;
}

/* --- Join: ordered steps, code blocks, copy buttons ---------------------- */

.join h1 {
  margin-block-end: var(--space-sm);
}

.join p {
  margin-block-end: var(--space-md);
}

.join ol {
  list-style: none;
  counter-reset: step;
}

.join ol > li {
  margin-block-end: var(--space-lg);
  position: relative;
}

.join ol > li::before {
  counter-increment: step;
  content: counter(step) ". ";
  font-weight: 600;
}

.join ol h2 {
  display: inline;
  font-size: 1rem;
  font-weight: 600;
  margin-block: 0;
}

.join pre {
  position: relative;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding-block: 0.75rem;
  padding-inline: 1rem;
  padding-inline-end: 4rem;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-all;
  margin-block: var(--space-sm) 0;
}

.join .copy-btn {
  position: absolute;
  inset-block-start: 0.4rem;
  inset-inline-end: 0.4rem;
  background: var(--color-border);
  border: none;
  border-radius: 3px;
  padding-block: 0.2rem;
  padding-inline: 0.5rem;
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--color-fg);
  transition: opacity 0.2s ease;
}

.join .copy-btn:hover {
  opacity: 0.8;
}

.join .copy-btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.join .copy-btn.copied {
  background: var(--color-link);
  color: var(--color-bg);
}

@media (prefers-reduced-motion: reduce) {
  .join .copy-btn {
    transition: none;
  }
}