/* ══════════════════════════════════════════════════════════════════
   style.css — ijoo.org Blog Theme
   Version   : 3.0.0
   Aesthetic : Editorial / fixed rail nav — inspired by Hydejack's
               sidebar + serif teaser-list layout, reinterpreted with
               [ijoo]'s own branding, colors and content model.
   Fonts     : Source Serif 4 (headings) + Inter (body/UI) + JetBrains Mono (meta)
   Layout    : Fixed dark sidebar rail + light editorial content column
══════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,500;8..60,600;8..60,700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ─── Tokens ─────────────────────────────────────────────────────── */
:root {
  --bg:            #f6f7fa;
  --bg-elevated:   #ffffff;
  --bg-elevated-2: #eef0f5;
  --bg-card:       #ffffff;

  --fg:            #14161c;
  --fg-mid:        #454957;
  --fg-muted:      #6d7185;
  --fg-ghost:      #9a9eb0;

  --accent:        #0f8a7c;
  --accent-dim:    rgba(15,138,124,.09);
  --accent-glow:   rgba(15,138,124,.25);
  --violet:        #6366f1;
  --violet-dim:    rgba(99,102,241,.08);

  --border:        rgba(13,15,20,.09);
  --border-strong: rgba(13,15,20,.16);

  /* Fixed rail (sidebar) — dark accent panel */
  --rail-w:        272px;
  --rail-bg:       #0a2e29;
  --rail-bg-2:     #0e3b34;
  --rail-fg:       #f3f6f5;
  --rail-fg-muted: rgba(243,246,245,.62);
  --rail-border:   rgba(255,255,255,.12);
  --rail-accent:   #4be8cf;

  --font-serif:    'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;
  --font-body:     'Inter', system-ui, sans-serif;

  --radius:        8px;
  --radius-lg:     12px;

  --shadow-sm:     0 1px 3px rgba(0,0,0,.3);
  --shadow-md:     0 8px 24px rgba(0,0,0,.35);
  --shadow-lg:     0 16px 48px rgba(0,0,0,.45);

  --transition:    .2s cubic-bezier(.4,0,.2,1);
}

/* ─── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

::selection { background: var(--accent-dim); color: var(--accent); }
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ════════════════════════════════════════════════════════════════
   RAIL — fixed sidebar (branding + site nav)
════════════════════════════════════════════════════════════════ */
.rail {
  position: fixed;
  top: 0; left: 0;
  width: var(--rail-w);
  height: 100vh;
  background: linear-gradient(165deg, var(--rail-bg-2), var(--rail-bg) 65%);
  color: var(--rail-fg);
  z-index: 400;
  overflow: hidden;
  transition: transform var(--transition);
}

.rail-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .55;
  pointer-events: none;
}

.rail-inner {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 40px 32px 28px;
  overflow-y: auto;
}

.rail-logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--rail-fg);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
}
.rail-logo .bracket { color: var(--rail-accent); }
.rail-logo-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--rail-accent);
  box-shadow: 0 0 8px rgba(75,232,207,.5);
  animation: pulse-dot 2.6s ease-in-out infinite;
}
@keyframes pulse-dot { 0%,100% { opacity:1; } 50% { opacity:.3; } }

.rail-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: .92rem;
  color: var(--rail-fg-muted);
  margin-top: 10px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rail-border);
}

.rail-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 24px;
}
.rail-link {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--rail-fg-muted);
  padding: 7px 0;
  width: fit-content;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.rail-link:hover { color: var(--rail-fg); border-color: var(--rail-border); }
.rail-link.active { color: var(--rail-fg); border-color: var(--rail-accent); }

.rail-footer {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--rail-border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.rail-meta {
  font-family: var(--font-mono);
  font-size: .64rem;
  color: rgba(243,246,245,.4);
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

/* Mobile toggle + backdrop */
.rail-toggle {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 500;
  width: 38px; height: 38px;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}
.rail-toggle-bar,
.rail-toggle-bar::before,
.rail-toggle-bar::after {
  content: '';
  display: block;
  width: 16px; height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.rail-toggle-bar { position: relative; }
.rail-toggle-bar::before { position: absolute; top: -5px; }
.rail-toggle-bar::after  { position: absolute; top: 5px; }

.rail-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,20,18,.45);
  z-index: 399;
  opacity: 0;
  transition: opacity var(--transition);
}

/* ════════════════════════════════════════════════════════════════
   CONTENT — editorial column
════════════════════════════════════════════════════════════════ */
.content {
  margin-left: var(--rail-w);
  min-height: 100vh;
}
.content-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 32px 96px;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--fg-ghost);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
}
.breadcrumb a { transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent); }

.page-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.08;
  color: var(--fg);
  margin-bottom: 14px;
}
.page-sub {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--fg-muted);
  max-width: 56ch;
  line-height: 1.6;
  margin-bottom: 8px;
}

/* ── Topic pills ── */
.topic-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.pill {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--fg-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 6px 13px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}
.pill:hover { border-color: var(--border-strong); color: var(--fg); }
.pill.active { background: var(--accent); border-color: var(--accent); color: #ffffff; }
.pill .count {
  font-size: .62rem;
  opacity: .7;
}

/* ════════════════════════════════════════════════════════════════
   POST LIST — teaser rows
════════════════════════════════════════════════════════════════ */
.post-list { display: flex; flex-direction: column; }

.post-row {
  padding: 30px 0;
  border-bottom: 1px solid var(--border);
  animation: fadeSlideUp .4s both;
}
.post-row:first-child { padding-top: 0; }
.post-row:last-child { border-bottom: none; }

.post-row-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.post-cat {
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 2px 8px;
  border-radius: 3px;
}
.post-date,
.post-rtime {
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--fg-ghost);
}
.post-rtime::before { content: '·'; margin-right: 8px; }

.post-row-title {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.01em;
  margin-bottom: 10px;
}
.post-row-title a { transition: color var(--transition); background-image: linear-gradient(var(--accent), var(--accent)); background-repeat: no-repeat; background-position: 0 100%; background-size: 0 1px; }
.post-row-title a:hover { color: var(--accent); }

.post-row-excerpt {
  font-family: var(--font-body);
  font-size: .96rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 62ch;
  margin-bottom: 14px;
}

.post-row-cta {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: .02em;
  padding-bottom: 1px;
  border-bottom: 1px solid var(--border-strong);
  transition: color var(--transition), border-color var(--transition);
}
.post-row-cta span { display: inline-block; transition: transform var(--transition); }
.post-row-cta:hover { color: var(--accent); border-color: var(--accent); }
.post-row-cta:hover span { transform: translateX(3px); }

.list-empty {
  padding: 40px 0;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--fg-ghost);
}

/* ════════════════════════════════════════════════════════════════
   LOADING / ERROR
════════════════════════════════════════════════════════════════ */
.loading-state,
.error-state {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 0;
  gap: 14px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: .78rem;
}

.spinner {
  width: 22px; height: 22px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

.btn-retry {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  padding: 8px 18px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  background: transparent;
  letter-spacing: .04em;
  transition: all var(--transition);
}
.btn-retry:hover { background: var(--accent); color: #ffffff; }

/* ════════════════════════════════════════════════════════════════
   PAGINATION
════════════════════════════════════════════════════════════════ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 32px 0 0;
  margin-top: 8px;
}
.page-btn {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--fg-mid);
  background: var(--bg-elevated);
  letter-spacing: .02em;
  transition: all var(--transition);
}
.page-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.page-btn:disabled { opacity: .3; cursor: not-allowed; }
.page-info {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--fg-ghost);
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ════════════════════════════════════════════════════════════════
   ARTICLE PAGE
════════════════════════════════════════════════════════════════ */
.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.article-cat {
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 2px 8px;
  border-radius: 3px;
}
.article-date,
.article-rtime {
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--fg-ghost);
}
.article-rtime::before { content: '·'; margin-right: 8px; }

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.2vw, 2.9rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--fg);
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

/* Image + sidenote row */
.article-media {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  margin-bottom: 36px;
}
.article-img-wrap {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  flex: 1 1 68%;
  aspect-ratio: 16 / 10;
  background: var(--bg-elevated-2);
}
.article-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}
.article-sidenote {
  flex: 1 1 28%;
  padding-top: 4px;
}
.sidenote-label {
  display: block;
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-ghost);
  margin-bottom: 8px;
}
.article-sidenote p {
  font-family: var(--font-serif);
  font-size: .92rem;
  line-height: 1.55;
  color: var(--fg-muted);
}

/* ── Body — full width WordPress HTML ── */
.article-body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--fg-mid);
}
.article-body p { margin-bottom: 1.4em; }
.article-body h1, .article-body h2,
.article-body h3, .article-body h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--fg);
  margin: 1.6em 0 .6em;
}
.article-body h2 {
  font-size: 1.5rem;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
}
.article-body h3 { font-size: 1.25rem; }
.article-body h4 { font-size: 1.05rem; }
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(15,138,124,.4);
}
.article-body a:hover { text-decoration-color: var(--accent); }
.article-body strong { font-weight: 700; color: var(--fg); }
.article-body ul, .article-body ol { padding-left: 1.5em; margin-bottom: 1.4em; }
.article-body li { margin-bottom: .45em; }
.article-body blockquote {
  border-left: 2px solid var(--accent);
  padding: 4px 20px;
  margin: 1.8em 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--fg-mid);
}
.article-body pre {
  background: #0c0d11;
  color: #a8ecd9;
  padding: 20px 22px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .85rem;
  line-height: 1.65;
  margin-bottom: 1.4em;
  border: 1px solid var(--border);
}
.article-body pre::before {
  content: '// CODE';
  display: block;
  font-size: .62rem;
  color: var(--rail-accent);
  letter-spacing: .1em;
  margin-bottom: 10px;
  opacity: .7;
}
.article-body code {
  font-family: var(--font-mono);
  font-size: .85em;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 1px 5px;
  border-radius: 3px;
}
.article-body pre code { background: none; padding: 0; color: inherit; }
.article-body img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 1.6em 0;
  border: 1px solid var(--border);
}
.article-body hr { border: none; border-top: 1px solid var(--border); margin: 2.5em 0; }
.article-body figure { margin: 2em 0; }
.article-body figcaption {
  text-align: center;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--fg-ghost);
  margin-top: 8px;
}
.article-body table { width: 100%; border-collapse: collapse; margin-bottom: 1.4em; font-size: .875rem; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.article-body th {
  background: var(--violet-dim);
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .04em;
}

.article-nav { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--border); }
.back-link {
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .03em;
  transition: opacity .2s;
}
.back-link:hover { opacity: .7; }

/* ════════════════════════════════════════════════════════════════
   TOOL — WireGuard AllowedIPs Calculator (wireguard.php)
════════════════════════════════════════════════════════════════ */
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.tool-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--fg-mid);
  margin-bottom: 8px;
}
.tool-field label span {
  font-family: var(--font-body);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--fg-ghost);
  font-size: .75rem;
}

.tool-field textarea {
  width: 100%;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: .85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated-2);
  color: var(--fg);
  resize: vertical;
  line-height: 1.6;
  transition: border-color var(--transition), background var(--transition);
}
.tool-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-elevated);
}

.tool-presets { margin-top: 10px; }
.tool-presets p {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--fg-ghost);
  margin-bottom: 6px;
}
.preset-btns { display: flex; flex-wrap: wrap; gap: 6px; }
.preset-btn {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 600;
  padding: 4px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--fg-muted);
  transition: all var(--transition);
}
.preset-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

.tool-actions { display: flex; align-items: center; gap: 12px; margin-top: 18px; }
.btn-primary {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .78rem;
  letter-spacing: .02em;
  padding: 10px 22px;
  background: var(--accent);
  color: #ffffff;
  border-radius: var(--radius);
  transition: opacity var(--transition);
}
.btn-primary:hover { opacity: .88; }
.btn-secondary {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 600;
  padding: 10px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg-mid);
  transition: all var(--transition);
}
.btn-secondary:hover { border-color: var(--border-strong); color: var(--fg); }

.tool-error {
  display: none;
  margin-top: 16px;
  padding: 10px 14px;
  background: rgba(220,38,38,.07);
  border: 1px solid rgba(220,38,38,.3);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .8rem;
  color: #b91c1c;
}
.tool-error.visible { display: block; }

.tool-result-card {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}
.tool-result-card.visible { display: block; }

.tool-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.tool-result-header h2 {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--fg-mid);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  background: var(--bg-elevated-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg-mid);
  transition: all var(--transition);
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied { background: var(--accent-dim); color: var(--accent); border-color: var(--accent); }

.tool-result-box {
  background: var(--bg-elevated-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 13px 15px;
  font-family: var(--font-mono);
  font-size: .85rem;
  line-height: 1.8;
  color: var(--fg);
  word-break: break-all;
  white-space: pre-wrap;
}

.tool-result-meta { display: flex; gap: 24px; margin-top: 12px; flex-wrap: wrap; }
.tool-result-meta .meta-item {
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--fg-muted);
}
.tool-result-meta strong { color: var(--fg); }

.tool-snippet { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 20px; }
.tool-snippet h3 {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--fg-mid);
  margin-bottom: 10px;
}
.snippet-box {
  background: #0c0d11;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 15px 17px;
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.85;
  color: #cdd6f4;
}
.snippet-box .kw { color: #89b4fa; }
.snippet-box .val { color: var(--rail-accent); }
.snippet-box .comment { color: #6c7086; }

.tool-info {
  padding: 20px 24px;
  background: var(--accent-dim);
  border: 1px solid rgba(15,138,124,.22);
  border-radius: var(--radius-lg);
}
.tool-info h2 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
}
.tool-info ul {
  padding-left: 1.3em;
  font-family: var(--font-body);
  font-size: .88rem;
  color: var(--fg-mid);
  line-height: 1.8;
}
.tool-info code {
  font-family: var(--font-mono);
  font-size: .85em;
  background: var(--bg-elevated);
  padding: 1px 5px;
  border-radius: 3px;
}

@media (max-width: 560px) {
  .tool-grid { grid-template-columns: 1fr; }
  .tool-card, .tool-result-card { padding: 18px; }
}

/* ════════════════════════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .rail {
    transform: translateX(-100%);
    width: min(var(--rail-w), 82vw);
    box-shadow: var(--shadow-lg);
  }
  .rail.open { transform: translateX(0); }
  .rail-backdrop.open { display: block; opacity: 1; }
  .rail-toggle { display: flex; }

  .content { margin-left: 0; }
  .content-inner { padding: 76px 22px 72px; }

  .article-media { flex-direction: column; }
  .article-sidenote { padding-top: 0; }
}

@media (max-width: 480px) {
  .content-inner { padding: 72px 16px 56px; }
  .post-row-title { font-size: 1.25rem; }
  .article-img-wrap { aspect-ratio: 16 / 9; }
}