/* vibe-coding-security — site styles
   Mobile-first. Breakpoints:
     ≤ 640px   phone           single col, hamburger nav
     641-900   tablet          single col content, hamburger nav, wider padding
     901-1199  small desktop   sidebar + content
     ≥ 1200px  large desktop   sidebar + content + right-rail TOC

   No JS dependencies beyond the menu-toggle handler in template.html.
   No web fonts. System fonts only. */

:root {
  /* Dark theme (default) */
  --bg: #0d1117;
  --bg-elev: #161b22;
  --bg-elev-2: #21262d;
  --fg: #c9d1d9;
  --fg-muted: #8b949e;
  --fg-strong: #f0f6fc;
  --accent: #ff7b72;
  --accent-2: #58a6ff;
  --border: #30363d;
  --border-strong: #484f58;
  --code-bg: #0a0d12;
  --link: #58a6ff;
  --link-hover: #79c0ff;

  --sev-critical: #f85149;
  --sev-high:     #ff8e3c;
  --sev-medium:   #d29922;
  --sev-low:      #56d364;

  --status-active:     #f85149;
  --status-contained:  #d29922;
  --status-patched:    #56d364;
  --status-mitigated:  #58a6ff;
  --status-ongoing:    #b392f0;
  --status-historical: #8b949e;

  --content-max: 760px;
  --sidebar-w: 280px;
  --toc-w: 240px;

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;

  --shadow-sm: 0 1px 0 rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-elev: #f6f8fa;
    --bg-elev-2: #eaeef2;
    --fg: #1f2328;
    --fg-muted: #59636e;
    --fg-strong: #0d1117;
    --accent: #cf222e;
    --accent-2: #0969da;
    --border: #d0d7de;
    --border-strong: #afb8c1;
    --code-bg: #f6f8fa;
    --link: #0969da;
    --link-hover: #0550ae;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Honor reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

.skip {
  position: absolute;
  left: -1000px;
  top: 0;
  background: var(--accent-2);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 1000;
  border-radius: 0 0 var(--r-md) 0;
  font-weight: 600;
}
.skip:focus { left: 0; }

a {
  color: var(--link);
  text-decoration: none;
}
a:hover { color: var(--link-hover); text-decoration: underline; }
a:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ────────── Topbar ────────── */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1rem;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  /* Safe area for iPhone notches */
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--fg-strong);
  min-height: 44px;
}
.brand:hover { text-decoration: none; }
.brand-mark { color: var(--accent); font-size: 1.25rem; line-height: 1; }
.brand-name {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9rem;
}

.topnav {
  display: none;
  gap: 1.5rem;
}
.topnav a {
  color: var(--fg);
  font-size: 0.95rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-weight: 500;
}
.topnav a:hover { color: var(--fg-strong); }
.topnav a.external::after {
  content: " ↗";
  color: var(--fg-muted);
  font-size: 0.85em;
  margin-left: 0.15em;
}

.menu-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: var(--r-md);
  font-size: 1.2rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.menu-toggle:hover { background: var(--bg-elev-2); }
.menu-toggle:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }

@media (min-width: 768px) {
  .brand-name { font-size: 0.95rem; }
  .topbar { padding: 0.75rem 1.5rem; }
}

@media (min-width: 900px) {
  .topnav { display: flex; }
  .menu-toggle { display: none; }
}

/* ────────── Layout ────────── */

.layout {
  display: grid;
  grid-template-columns: 1fr;
  min-height: calc(100vh - 60px);
}

.sidebar {
  display: none;
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem 3rem;
  overflow-y: auto;
}

.sidebar-inner { display: block; }

.sidebar a {
  display: flex;
  align-items: center;
  padding: 0.55rem 0.7rem;
  border-radius: var(--r-md);
  color: var(--fg);
  min-height: 40px;
  font-size: 0.92rem;
  line-height: 1.35;
}
.sidebar a:hover { background: var(--bg-elev-2); text-decoration: none; }
.sidebar a.active {
  background: var(--bg-elev-2);
  color: var(--fg-strong);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent-2);
}

.nav-home, .nav-alerts {
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.nav-alerts { color: var(--accent) !important; }
.nav-alerts.active { box-shadow: inset 3px 0 0 var(--accent); }

.nav-section { margin-top: 1.5rem; }
.nav-section-header {
  font-weight: 600 !important;
  text-transform: uppercase;
  font-size: 0.75rem !important;
  letter-spacing: 0.05em;
  color: var(--fg-muted) !important;
  padding: 0.4rem 0.7rem !important;
  min-height: 32px !important;
}
.nav-section-header.active {
  color: var(--fg-strong) !important;
  background: transparent !important;
  box-shadow: none !important;
}

.nav-section-items {
  list-style: none;
  margin: 0.25rem 0 0;
  padding: 0;
  border-left: 1px solid var(--border);
  margin-left: 0.7rem;
}
.nav-section-items li { margin: 0; }
.nav-section-items li a {
  font-size: 0.88rem;
  padding-left: 1rem;
  min-height: 36px;
}

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-left: 0.5rem;
  background: var(--fg-muted);
  flex-shrink: 0;
}
.dot-critical { background: var(--sev-critical); }
.dot-high     { background: var(--sev-high); }
.dot-medium   { background: var(--sev-medium); }
.dot-low      { background: var(--sev-low); }

/* Tablet: still hamburger, but show desktop topnav from 900 */

@media (min-width: 900px) {
  .layout {
    grid-template-columns: var(--sidebar-w) 1fr;
  }
  .sidebar { display: block; }
}

@media (min-width: 1200px) {
  .layout {
    grid-template-columns: var(--sidebar-w) 1fr var(--toc-w);
  }
}

/* Mobile sidebar drawer */
body.nav-open .sidebar {
  display: block;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  overflow-y: auto;
  padding-bottom: max(3rem, env(safe-area-inset-bottom));
}

@media (min-width: 900px) {
  body.nav-open .sidebar {
    position: static;
  }
}

/* ────────── Content ────────── */

.content {
  padding: 1.5rem 1rem 4rem;
  max-width: 100%;
  min-width: 0;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
}

article {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-header {
  margin: 0 0 1.5rem;
}
.page-title {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.2;
  color: var(--fg-strong);
  font-weight: 700;
  letter-spacing: -0.01em;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* Page actions (View raw / Edit on GitHub) */
.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
}
.page-action {
  display: inline-flex;
  align-items: center;
  font-size: 0.8rem;
  padding: 0.25rem 0.65rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--fg-muted);
  min-height: 44px;
}
.page-action:hover {
  background: var(--bg-elev-2);
  color: var(--fg);
  text-decoration: none;
}

.footer-formats {
  margin-top: 0.5rem;
  font-size: 0.78rem;
  color: var(--fg-muted);
}
.footer-formats a {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (min-width: 640px) {
  .content { padding: 2rem 1.5rem 4rem; }
  .page-title { font-size: 1.9rem; }
}
@media (min-width: 900px) {
  .content { padding: 2.5rem 2.5rem 5rem; }
  .page-title { font-size: 2.1rem; }
}
@media (min-width: 1200px) {
  .content { padding: 2.5rem 3rem 5rem; }
}

/* ────────── Breadcrumb (tablet, no sidebar visible) ────────── */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin: 0 0 1rem;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
}
.breadcrumb a { color: var(--fg-muted); }
.breadcrumb a:hover { color: var(--fg); }
.breadcrumb span { color: var(--border-strong); }

@media (min-width: 900px) {
  .breadcrumb { display: none; }
}

/* ────────── Meta bar (advisory frontmatter) ────────── */

.meta {
  display: block;
  padding: 1rem 1.1rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin: 1rem 0 0;
  font-size: 0.88rem;
  color: var(--fg);
}

.meta-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.meta-rows {
  display: grid;
  gap: 0.5rem 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 540px) {
  .meta-rows {
    grid-template-columns: max-content 1fr;
  }
}

.meta-row {
  display: contents;
}

.meta-label {
  color: var(--fg-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

@media (min-width: 540px) {
  .meta-label { padding-top: 2px; }
}

.meta-row time { color: var(--fg-strong); font-variant-numeric: tabular-nums; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.4rem;
}

.chip {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--fg);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  white-space: nowrap;
}
.chip-tag {
  font-size: 0.72rem;
  color: var(--fg-muted);
  background: transparent;
}
.chip-eco { border-color: var(--accent-2); }

.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #0d1117;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.badge-sev-critical { background: var(--sev-critical); color: #fff; }
.badge-sev-high     { background: var(--sev-high); color: #fff; }
.badge-sev-medium   { background: var(--sev-medium); }
.badge-sev-low      { background: var(--sev-low); }

.badge-status-active     { background: var(--status-active); color: #fff; }
.badge-status-contained  { background: var(--status-contained); }
.badge-status-patched    { background: var(--status-patched); }
.badge-status-mitigated  { background: var(--status-mitigated); color: #fff; }
.badge-status-ongoing    { background: var(--status-ongoing); color: #fff; }
.badge-status-historical { background: var(--status-historical); color: #fff; }

/* ────────── TOC (right rail at ≥1200px, hidden below) ────────── */

.toc {
  display: none;
  padding: 2.5rem 1.5rem 2.5rem 0.5rem;
  font-size: 0.85rem;
  position: sticky;
  top: 60px;
  align-self: flex-start;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

.toc-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  margin: 0 0 0.8rem;
  font-weight: 700;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--border);
}
.toc-list li {
  margin: 0;
}
.toc-list a {
  display: block;
  padding: 0.3rem 0.75rem;
  color: var(--fg-muted);
  line-height: 1.4;
  border-left: 2px solid transparent;
  margin-left: -1px;
}
.toc-list a:hover {
  color: var(--fg);
  text-decoration: none;
  border-left-color: var(--border-strong);
}
.toc-d3 a { padding-left: 1.5rem; font-size: 0.82rem; }

@media (min-width: 1200px) {
  body.has-toc .toc { display: block; }
}

/* ────────── Markdown body ────────── */

.markdown-body {
  font-size: 1rem;
  line-height: 1.7;
}

.markdown-body > *:first-child { margin-top: 0; }

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  color: var(--fg-strong);
  margin: 2rem 0 0.75rem;
  line-height: 1.3;
  font-weight: 600;
  scroll-margin-top: 80px;
}
.markdown-body h2 {
  font-size: 1.35rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
  margin-top: 2.75rem;
}
.markdown-body h3 { font-size: 1.1rem; }
.markdown-body h4 { font-size: 1rem; color: var(--fg); }

.markdown-body p { margin: 0.85rem 0; word-wrap: break-word; }
.markdown-body ul, .markdown-body ol { padding-left: 1.5rem; margin: 0.85rem 0; }
.markdown-body li { margin: 0.4rem 0; }
.markdown-body li > p { margin: 0.25rem 0; }
.markdown-body li > ul, .markdown-body li > ol { margin: 0.25rem 0; }

.markdown-body blockquote {
  margin: 1.25rem 0;
  padding: 0.6rem 1rem;
  border-left: 4px solid var(--accent-2);
  background: var(--bg-elev);
  color: var(--fg-muted);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.markdown-body blockquote p { margin: 0.4rem 0; }

.markdown-body code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--bg-elev-2);
  padding: 0.15em 0.4em;
  border-radius: var(--r-sm);
  word-break: break-word;
}
.markdown-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.9rem 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.55;
  -webkit-overflow-scrolling: touch;
  margin: 1rem 0;
}
.markdown-body pre code {
  background: transparent;
  padding: 0;
  font-size: 1em;
  word-break: normal;
  white-space: pre;
}

.markdown-body a { word-break: break-word; }
.markdown-body a code { color: var(--link); }

/* Tables — scroll on mobile, fit on desktop */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.9rem;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}
@media (min-width: 700px) {
  .markdown-body table { display: table; }
}
.markdown-body th, .markdown-body td {
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.markdown-body th + th, .markdown-body td + td {
  border-left: 1px solid var(--border);
}
.markdown-body th {
  background: var(--bg-elev);
  font-weight: 600;
  color: var(--fg-strong);
  position: sticky;
  top: 0;
}
.markdown-body tr:last-child td { border-bottom: 0; }
.markdown-body tr:nth-child(even) td { background: var(--bg-elev); }

.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--r-md);
}

/* codehilite tokens (Pygments) — minimal palette */
.code .k, .code .kn, .code .kd, .code .kc { color: #ff7b72; }
.code .s, .code .s1, .code .s2, .code .sb { color: #a5d6ff; }
.code .c, .code .c1, .code .cm { color: #8b949e; font-style: italic; }
.code .nb, .code .nc { color: #d2a8ff; }
.code .nf, .code .nx { color: #d2a8ff; }
.code .mi, .code .mf, .code .mh { color: #79c0ff; }
.code .o, .code .ow { color: #ff7b72; }
.code .err { color: var(--accent); }

@media (prefers-color-scheme: light) {
  .code .k, .code .kn, .code .kd, .code .kc { color: #cf222e; }
  .code .s, .code .s1, .code .s2, .code .sb { color: #0a3069; }
  .code .c, .code .c1, .code .cm { color: #6e7781; }
  .code .nb, .code .nc, .code .nf, .code .nx { color: #8250df; }
  .code .mi, .code .mf, .code .mh { color: #0550ae; }
  .code .o, .code .ow { color: #cf222e; }
}

/* ────────── Footer ────────── */

.footer {
  max-width: var(--content-max);
  margin: 4rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.85rem;
  text-align: center;
}
.footer a { color: var(--fg-muted); }
.footer a:hover { color: var(--fg); }

/* ────────── Print ────────── */

@media print {
  .topbar, .sidebar, .toc, .footer, .menu-toggle, .skip, .breadcrumb { display: none !important; }
  .layout { grid-template-columns: 1fr !important; }
  .content { padding: 0 !important; }
  article { max-width: 100% !important; }
  a { color: inherit; text-decoration: underline; }
  .markdown-body a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
}