/* AIAgentThreats - clean, professional, fast */
:root {
  --bg: #0f1115;
  --surface: #171a21;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #2a2f3a;
  --radius: 8px;
  --max: 1100px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 17px;
}

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.logo:hover { text-decoration: none; color: var(--accent); }

nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

nav a:hover { color: var(--text); }

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 36rem;
  margin-bottom: 1.75rem;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none !important;
}

.btn:hover { background: var(--accent-hover); }

/* Posts */
section { padding: 2.5rem 0; }

h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.post-card .meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.post-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.post-card h3 a { color: var(--text); }
.post-card h3 a:hover { color: var(--accent); }

.post-card p { color: var(--muted); font-size: 0.95rem; }

/* Trust row */
.trust-row {
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
  margin-top: 2rem;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid a { color: var(--muted); display: inline-block; margin-bottom: 0.35rem; }
.footer-grid a:hover { color: var(--text); }

.copyright {
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

/* Article pages */
.article {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.article h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.article .meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.article h2 {
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
}

.article p, .article ul, .article ol {
  margin-bottom: 1.25rem;
}

.article ul, .article ol {
  padding-left: 1.5rem;
}

.article li { margin-bottom: 0.4rem; }

.article blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
  color: var(--muted);
  margin: 1.5rem 0;
}

/* Forms */
.form-group { margin-bottom: 1.25rem; }
label { display: block; margin-bottom: 0.35rem; font-weight: 500; }
input[type="email"], input[type="text"] {
  width: 100%;
  max-width: 400px;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
}

/* Responsive */
@media (max-width: 700px) {
  .site-header .container { flex-direction: column; align-items: flex-start; }
  nav { gap: 0.9rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero { padding: 2.5rem 0 2rem; }
}

/* Added: accessibility, article furniture, glossary */
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--accent); color: #fff; padding: 0.5rem 1rem; z-index: 200; }
.skip-link:focus { left: 1rem; top: 1rem; }
.logo { display: inline-flex; align-items: center; gap: 0.5rem; }
.logo-mark { width: 24px; height: 24px; }
nav a[aria-current="page"] { color: var(--text); }
.more { margin-top: 1.5rem; color: var(--muted); }
.breadcrumbs { font-size: 0.85rem; color: var(--muted); margin-bottom: 1rem; }
.breadcrumbs a { color: var(--muted); }
.article .lede { font-size: 1.1rem; }
.hero-img { width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); margin: 0.5rem 0 2rem; display: block; }
.article h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
.article code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.88em; background: var(--surface); border: 1px solid var(--border); border-radius: 4px; padding: 0.05rem 0.3rem; overflow-wrap: anywhere; }
.faq h3 { margin-top: 1.25rem; }
.related { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.5rem 1.25rem 0.25rem; margin: 2rem 0; }
.related h2 { margin-top: 1rem; }
.sources { font-size: 0.92rem; overflow-wrap: anywhere; }
.rule { margin: 2.5rem 0; border: none; border-top: 1px solid var(--border); }
.footnote { color: var(--muted); font-size: 0.9rem; }
.toc { font-size: 0.92rem; color: var(--muted); }
.glossary dt { font-weight: 700; font-size: 1.15rem; margin-top: 1.75rem; scroll-margin-top: 5rem; }
.glossary dt .anchor { color: var(--text); }
.glossary dd { margin: 0.4rem 0 0; }
.glossary .src { color: var(--muted); font-size: 0.9rem; }
.signup-box { margin: 2rem 0; padding: 1.5rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.signup-box h2 { margin-top: 0; }
:target { scroll-margin-top: 5rem; }
.signup-form { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.signup-form label { flex-basis: 100%; font-weight: 600; }
.signup-form input[type="email"] { flex: 1 1 260px; padding: 0.65rem 0.8rem; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius); font: inherit; }
.signup-form input[type="email"]:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.signup-form button { cursor: pointer; border: 0; font: inherit; }
.signup-form .form-note { flex-basis: 100%; margin: 0; color: var(--muted); font-size: 0.9rem; }