/* =============================================================================
   pilot-changelog GitHub Pages — design tokens lifted from pilotprotocol.network
   so this site visually belongs to the same family. Self-contained: no Astro,
   no build step, just <link rel="stylesheet"> from index.html.
   ============================================================================= */

:root {
  --bg:        #0b0b0a;
  --bg-2:      #111110;
  --bg-deep:   #070706;
  --ink:       #eceae3;
  --ink-dim:   #8a8a83;
  --ink-faint: #3a3a37;
  --line:      #1d1d1b;
  --line-2:    #26261f;
  --accent:        oklch(0.88 0.22 125);
  --accent-ink:    #0b0b0a;
  --accent-dim:    oklch(0.88 0.22 125 / .18);
  --term-bg:       #060605;

  --serif: 'Instrument Serif', 'Times New Roman', serif;
  --sans:  'Inter Tight', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono:  'JetBrains Mono', ui-monospace, Menlo, monospace;

  --wrap-max: 1440px;

  color-scheme: dark;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { overflow-x: hidden; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (max-width: 640px) { body { font-size: 15px; } }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

::selection { background: var(--accent); color: var(--accent-ink); }

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

.wrap {
  max-width: var(--wrap-max);
  margin: 0 auto;
  padding: 0 48px;
  position: relative;
}
@media (max-width: 900px) { .wrap { padding: 0 28px; } }
@media (max-width: 520px) { .wrap { padding: 0 20px; } }

/* ============================================================
   NAV
   ============================================================ */

.nav-top {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-top .nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  gap: 16px;
}
.nav-top .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  color: var(--ink);
}
.nav-top .brand:hover { color: var(--ink); }
.nav-top .brand-text {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
}
.nav-top .brand-tag {
  display: block;
  font-style: italic;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: none;
  color: #8a8a8a;
  margin-top: 4px;
}
.nav-top .nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--ink-dim);
}
.nav-top .nav-link { color: var(--ink-dim); }
.nav-top .nav-link:hover { color: var(--ink); }

.nav-top .nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}
.nav-top .bots-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px;
  border: 1px dashed var(--line-2);
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.15s, border-color 0.15s, border-style 0.15s;
}
.nav-top .bots-link:hover {
  color: var(--ink);
  border-color: var(--ink);
  border-style: solid;
}

@media (max-width: 720px) {
  .nav-top .nav-links { display: none; }
}

/* ============================================================
   BLOG-LIST + CARDS
   ============================================================ */

.blog-list {
  max-width: 880px;
  margin: 0 auto;
  padding: 96px 32px 80px;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 16px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--ink-dim);
  display: inline-block;
}
.blog-list h1 {
  font-family: var(--sans);
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 12px;
}
.blog-list h1 em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
.blog-list .subtitle {
  color: var(--ink-dim);
  font-size: 17px;
  max-width: 60ch;
  line-height: 1.55;
  margin: 0 0 28px;
}

.rss-group {
  display: inline-flex;
  align-items: center;
  position: relative;
  margin-bottom: 24px;
  border: 1px solid var(--line);
  transition: border-color 0.2s;
}
.rss-group:hover { border-color: var(--ink-faint); }
.rss-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.15s;
}
.rss-btn:hover { color: var(--accent); }
.rss-divider {
  width: 1px;
  height: 16px;
  background: var(--line);
}

.status-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.status-pill {
  padding: 5px 12px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.status-pill strong {
  color: var(--ink);
  font-weight: 500;
}

.blog-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.filter-tab {
  padding: 6px 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.filter-tab:hover { color: var(--ink); border-color: var(--ink-faint); }
.filter-tab.active {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

#entry-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.entry-card {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.15s;
}
.entry-card .meta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 10px;
}
.entry-card .meta .date {
  color: var(--ink);
  font-weight: 500;
}
.entry-card .meta .tag {
  padding: 3px 8px;
  border: 1px solid var(--line);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  font-size: 10px;
}
.entry-card .meta .tag-protocol { color: var(--accent); border-color: var(--accent-dim); }
.entry-card .meta .tag-networks { color: #8be0ff; border-color: rgba(139,224,255,0.3); }
.entry-card .meta .tag-skills   { color: #ffb38b; border-color: rgba(255,179,139,0.3); }
.entry-card .meta .tag-infra    { color: #b8b8ff; border-color: rgba(184,184,255,0.3); }
.entry-card .meta .tag-ops      { color: #ff8bd0; border-color: rgba(255,139,208,0.3); }
.entry-card .meta .tag-docs     { color: var(--ink-dim); }

.entry-card .badge-flag {
  padding: 3px 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 500;
  letter-spacing: 0.1em;
}

.entry-card h3 {
  font-family: var(--sans);
  font-size: 22px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 12px;
}
.entry-card h3 a { color: inherit; }
.entry-card h3 a:hover { color: var(--accent); }

/* Single-entry page (per-entry permalink) */
.entry-page { padding-top: 56px; }
.entry-card.single {
  border-bottom: 0;
  padding: 24px 0 48px;
}
.entry-card.single h1 {
  font-family: var(--sans);
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 24px;
}
.entry-card.single .card-body {
  font-size: 17px;
  line-height: 1.7;
}
.entry-nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  padding: 24px 0 0;
  margin-top: 24px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.entry-nav-link {
  color: var(--ink-dim);
  padding: 6px 12px;
  border: 1px solid var(--line);
  transition: color 0.15s, border-color 0.15s;
}
.entry-nav-link:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}
.entry-card .card-body {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.6;
}
.entry-card .card-body p { margin: 0 0 12px; }
.entry-card .card-body p:last-child { margin-bottom: 0; }
.entry-card .card-body code {
  font-family: var(--mono);
  background: var(--bg-2);
  padding: 1px 5px;
  font-size: 0.86em;
  color: var(--accent);
  border: 1px solid var(--line);
}
.entry-card .card-links {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 11px;
  word-break: break-all;
}
.entry-card .card-links a {
  color: var(--ink-dim);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 3px;
}
.entry-card .card-links a:hover { color: var(--accent); }

.empty {
  padding: 64px 0;
  text-align: center;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (max-width: 720px) {
  .blog-list { padding: 72px 20px 56px; }
  .entry-card { padding: 24px 0; }
  .entry-card h3 { font-size: 20px; }
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.foot-grid h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 16px;
  font-weight: 500;
}
.foot-grid a {
  display: block;
  padding: 6px 0;
  color: var(--ink);
  font-size: 15px;
}
.foot-grid a:hover { color: var(--accent); }
.foot-about p {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.55;
}
.foot-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  flex-wrap: wrap;
  gap: 16px;
}
.foot-status {
  color: var(--ink-dim);
}
.foot-status:hover { color: var(--accent); }

@media (max-width: 900px) {
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 480px) {
  .foot-grid { grid-template-columns: 1fr; gap: 24px; }
  .site-footer { padding: 56px 0 32px; }
}