/* Pressbin default theme
 *
 * Themes override only :root tokens. The stable token contract is:
 *   --pb-bg, --pb-bg-alt, --pb-surface, --pb-border
 *   --pb-ink, --pb-ink-soft, --pb-ink-muted
 *   --pb-accent, --pb-accent-dim
 *   --pb-code-bg, --pb-code-text, --pb-code-inline
 *   --pb-font-serif, --pb-font-sans, --pb-font-mono
 */

:root {
  /* ── Color tokens (default = landing palette) ──────────────── */
  --pb-bg:      #F7F5F0;   /* page background  */
  --pb-bg-alt:  #EFECE4;   /* table headers, subtle alt surface */
  --pb-surface: #FFFFFF;   /* card / panel surface */
  --pb-border:  #E0DDD5;   /* rules, dividers, input borders */

  --pb-ink:      #0D0D0D;
  --pb-ink-soft: #3D3D3D;
  --pb-ink-muted:#888888;

  --pb-accent:    #1A1AFF;
  --pb-accent-dim: color-mix(in srgb, var(--pb-accent) 10%, white);

  --pb-code-bg:     #0D0D0D;
  --pb-code-text:   #CDD6F4;
  --pb-code-inline: color-mix(in srgb, var(--pb-accent) 8%, transparent);

  /* ── Font tokens (themes may override) ─────────────────────── */
  --pb-font-serif: 'Instrument Serif', Georgia, serif;
  --pb-font-sans:  'DM Sans', system-ui, sans-serif;
  --pb-font-mono:  'DM Mono', 'Courier New', monospace;

  /* ── Scale tokens (layout / typography) ────────────────────── */
  --pb-text-base:     1rem;
  --pb-text-sm:       0.875rem;
  --pb-leading:       1.7;
  --pb-leading-tight: 1.12;

  --pb-wrap:      860px;
  --pb-gap:       clamp(1rem, 4vw, 2rem);
  --pb-radius:    6px;
  --pb-radius-sm: 4px;

  --pb-shadow-sm: 0 1px 3px rgba(13, 13, 13, 0.06);
  --pb-shadow:    0 8px 24px rgba(13, 13, 13, 0.10);
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }
img  { max-width: 100%; height: auto; display: block; }

/* ── Body ───────────────────────────────────────────────────── */
.pb-body {
  min-height: 100vh;
  font-family: var(--pb-font-sans);
  font-size: var(--pb-text-base);
  line-height: var(--pb-leading);
  background: var(--pb-bg);
  color: var(--pb-ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ── Layout ─────────────────────────────────────────────────── */
.pb-main {
  max-width: var(--pb-wrap);
  margin: 0 auto;
  padding: 3rem var(--pb-gap) 4rem;
}

.pb-stack    { display: grid;  }


/* ── Typography utilities ───────────────────────────────────── */
.pb-h1 {
  font-family: var(--pb-font-serif);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: var(--pb-leading-tight);
  letter-spacing: -0.02em;
  font-weight: 400;
  margin: 0;
}

.pb-lead {
  margin: 0;
  color: var(--pb-ink-soft);
  font-size: 1.05rem;
  max-width: 70ch;
}

.pb-muted   { color: var(--pb-ink-muted); }
.pb-text-sm { font-size: var(--pb-text-sm); }

.pb-link { color: var(--pb-accent); text-decoration: none; }
.pb-link:hover { text-decoration: underline; }

/* ── Nav ────────────────────────────────────────────────────── */
.pb-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--pb-bg) 90%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--pb-border);
}

.pb-nav-inner {
  max-width: var(--pb-wrap);
  margin: 0 auto;
  padding: 0 var(--pb-gap);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 1rem;
}

.pb-nav-logo {
  font-family: var(--pb-font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--pb-ink);
  text-decoration: none;
  flex-shrink: 0;
}
.pb-nav-logo:hover { text-decoration: none; }

.pb-nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.pb-nav-link {
  font-size: 0.9rem;
  color: var(--pb-ink-soft);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0;
  border-radius: 0;
  background: none;
  transition: color 0.15s;
}
.pb-nav-link:hover { color: var(--pb-ink); text-decoration: none; background: none; }

.pb-icon { width: 16px; height: 16px; }

/* ── Footer ─────────────────────────────────────────────────── */
.pb-footer {
  background: var(--pb-ink);
  color: rgba(255, 255, 255, 0.3);
  font-family: var(--pb-font-mono);
  font-size: 0.75rem;
  text-align: center;
  padding: 2rem var(--pb-gap);
  margin-top: 4rem;
  max-width: unset;
  border-top: none;
}

/* ── Search ─────────────────────────────────────────────────── */
.pb-search { width: 100%; }

.pb-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--pb-border);
  border-radius: var(--pb-radius);
  background: var(--pb-surface);
  color: var(--pb-ink);
  font: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.pb-input:focus {
  border-color: var(--pb-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--pb-accent) 14%, transparent);
}
.pb-input::placeholder { color: var(--pb-ink-muted); }

.pb-search-empty {
  padding: 0.9rem 1.1rem;
  background: var(--pb-surface);
  border: 1px solid var(--pb-border);
  border-radius: var(--pb-radius);
  font-size: var(--pb-text-sm);
  color: var(--pb-ink-muted);
}
.pb-search-panel {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.75rem;
}
.pb-search-header {
  margin: 0;
  font-size: var(--pb-text-sm);
  color: var(--pb-ink-muted);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--pb-border);
}
.pb-search-results { margin-top: 1rem; display: grid; gap: 0.75rem; }

/* ── Post list ──────────────────────────────────────────────── */
.pb-posts { display: grid; gap: 0; }

.pb-post-card {
  position: relative;       /* anchor for stretched link */
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--pb-border);
}
.pb-posts .pb-post-card:last-child { border-bottom: none; }
.pb-post-card-compact { padding: 0.85rem 0; }

/* Title link — stretched to cover the whole card */
.pb-post-title {
  margin: 0 0 0.3rem;
  font-family: var(--pb-font-serif);
  font-size: 1.3rem;
  line-height: 1.25;
  font-weight: 400;
}
.pb-post-title a {
  color: var(--pb-ink);
  text-decoration: none;
  transition: color 0.15s;
}
.pb-post-title a::after {
  content: '';
  position: absolute;
  inset: 0;
}
.pb-post-card:hover .pb-post-title a { color: var(--pb-accent); }

/* Meta and tags sit above the stretched link */
.pb-post-meta {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.75rem;
  font-family: var(--pb-font-mono);
  color: var(--pb-ink-muted);
  margin-bottom: 0.45rem;
}
.pb-post-summary {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--pb-ink-soft);
  font-size: 0.9rem;
  line-height: 1.65;
  max-width: 68ch;
}

/* ── Tags ───────────────────────────────────────────────────── */
.pb-tags { display: inline-flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }

/* Tags must sit above the .pb-post-title stretched link */
.pb-tag {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--pb-radius-sm);
  border: 1px solid color-mix(in srgb, var(--pb-accent) 20%, var(--pb-border));
  background: var(--pb-accent-dim);
  color: var(--pb-accent);
  font-family: var(--pb-font-mono);
  font-size: 0.72rem;
  text-decoration: none;
  white-space: nowrap;
}
.pb-tag:hover {
  background: color-mix(in srgb, var(--pb-accent) 16%, transparent);
  text-decoration: none;
}

/* ── Pills (tags index page) ────────────────────────────────── */
.pb-pills { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.pb-pill {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: var(--pb-radius);
  background: var(--pb-surface);
  color: var(--pb-ink-soft);
  text-decoration: none;
  font-family: var(--pb-font-mono);
  font-size: 0.82rem;
  border: 1px solid var(--pb-border);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.pb-pill:hover {
  background: var(--pb-accent-dim);
  color: var(--pb-accent);
  border-color: color-mix(in srgb, var(--pb-accent) 25%, var(--pb-border));
  text-decoration: none;
}

/* ── Pagination ─────────────────────────────────────────────── */
.pb-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--pb-border);
}

/* ── Post detail — white reading card ───────────────────────── */
.pb-main > article {
  background: var(--pb-surface);
  border: 1px solid var(--pb-border);
  border-radius: var(--pb-radius);
  padding: 2.5rem clamp(1.5rem, 4vw, 3rem);
}

.pb-post-header {
  padding-bottom: 1.75rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--pb-border);
}

.pb-post-h1 {
  margin: 0;
  font-family: var(--pb-font-serif);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: var(--pb-leading-tight);
  letter-spacing: -0.02em;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

/* ── Prose (rendered Markdown) ──────────────────────────────── */
.pb-prose {
  color: var(--pb-ink-soft);
  font-size: 1.0625rem;
  line-height: 1.85;
}
.pb-prose > :first-child { margin-top: 0; }

.pb-prose h1,
.pb-prose h2,
.pb-prose h3,
.pb-prose h4 {
  color: var(--pb-ink);
  font-family: var(--pb-font-serif);
  line-height: var(--pb-leading-tight);
  font-weight: 400;
  margin: 2.1em 0 0.6em;
}
.pb-prose h1 { font-size: 2rem; }
.pb-prose h2 {
  font-size: 1.5rem;
  border-bottom: 1px solid var(--pb-border);
  padding-bottom: 0.25em;
}
.pb-prose h3 { font-size: 1.2rem; }
.pb-prose h4 { font-size: 1rem; font-family: var(--pb-font-sans); font-weight: 600; }

.pb-prose p { margin: 0 0 1.25em; }

.pb-prose a {
  color: var(--pb-accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--pb-accent) 35%, transparent);
  text-underline-offset: 3px;
}
.pb-prose a:hover { text-decoration-color: var(--pb-accent); }

.pb-prose ul,
.pb-prose ol {
  padding-left: 1.4em;
  margin: 0 0 1.25em;
}
.pb-prose li { margin: 0.25em 0; }

.pb-prose blockquote {
  margin: 1.6em 0;
  padding: 0.6em 0 0.6em 1.1em;
  border-left: 3px solid var(--pb-accent);
  color: var(--pb-ink-muted);
  font-style: italic;
}
.pb-prose blockquote p { margin: 0; }

.pb-prose code {
  font-family: var(--pb-font-mono);
  font-size: 0.875em;
  background: var(--pb-code-inline);
  padding: 0.15em 0.4em;
  border-radius: var(--pb-radius-sm);
  color: var(--pb-accent);
}
.pb-prose pre {
  background: var(--pb-code-bg);
  color: var(--pb-code-text);
  border-radius: var(--pb-radius);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.6em 0;
  line-height: 1.7;
}
.pb-prose pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: 0.85em;
}

.pb-prose hr {
  border: 0;
  border-top: 1px solid var(--pb-border);
  margin: 2.3em 0;
}

.pb-prose table {
  width: 100%;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
  margin: 1.6em 0;
  font-size: var(--pb-text-sm);
}
.pb-prose thead tr { background: var(--pb-bg-alt); }
.pb-prose th,
.pb-prose td {
  padding: 0.65em 1rem;
  border-bottom: 1px solid var(--pb-border);
  text-align: left;
}
.pb-prose tr:last-child td { border-bottom: none; }
.pb-prose th {
  font-family: var(--pb-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--pb-ink-muted);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .pb-main { padding-top: 2rem; padding-bottom: 2.5rem; }
  .pb-nav-links a:nth-child(2) { display: none; }
  .pb-main > article {
    padding: 1.5rem 1.25rem;
    border-left: none;
    border-right: none;
    border-radius: 0;
    margin-left: calc(-1 * var(--pb-gap));
    margin-right: calc(-1 * var(--pb-gap));
  }
  .pb-prose pre {
    border-radius: 0;
    margin-left: -1.25rem;
    margin-right: -1.25rem;
  }
}