/* AI Tool Intelligence — preview site styles. Single file, no external deps. */
:root {
  --fg: #1b1d22;
  --fg-soft: #4b5160;
  --muted: #6b7280;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --border: #e3e5ea;
  --accent: #1f4ed8;
  --accent-soft: #eaf0ff;
  --warn-bg: #fff7e0;
  --warn-border: #f1d98a;
  --warn-fg: #6b4a00;
  --code-bg: #f1f3f6;
  --max-w: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

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

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.site-header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 20px 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.site-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.site-nav a {
  margin-left: 14px;
  color: var(--fg-soft);
  font-size: 14px;
}
.site-nav a:first-child { margin-left: 0; }
.site-nav a:hover { color: var(--accent); }

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px 20px 56px;
}

h1, h2, h3, h4 {
  color: var(--fg);
  line-height: 1.25;
  margin-top: 1.8em;
  margin-bottom: 0.5em;
  letter-spacing: -0.01em;
}
h1 { font-size: 30px; margin-top: 0.2em; }
h2 { font-size: 22px; border-top: 1px solid var(--border); padding-top: 1.2em; }
h3 { font-size: 18px; }

p, ul, ol, blockquote { margin: 0 0 1em; }

ul, ol { padding-left: 1.4em; }
li { margin-bottom: 0.35em; }

blockquote {
  border-left: 3px solid var(--border);
  padding: 0.4em 0.9em;
  color: var(--fg-soft);
  background: var(--bg-soft);
  margin: 0 0 1.2em;
  border-radius: 0 4px 4px 0;
}
blockquote p:last-child { margin-bottom: 0; }

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

.preview-banner {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-fg);
  padding: 12px 14px;
  border-radius: 6px;
  margin: 0 0 24px;
  font-size: 14px;
}
.preview-banner strong { color: #4a3300; }

.card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.card-list li {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  background: var(--bg-soft);
}
.card-list a { display: block; font-weight: 600; }
.card-list .desc {
  display: block;
  color: var(--fg-soft);
  font-size: 14px;
  margin-top: 4px;
  font-weight: 400;
}

.section-head {
  margin: 2em 0 0.6em;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 1.4em;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 20px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
.site-footer a { color: var(--muted); text-decoration: underline; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.4em;
  font-size: 15px;
}
th, td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
th { background: var(--bg-soft); }

@media (max-width: 520px) {
  body { font-size: 16px; }
  h1 { font-size: 26px; }
  h2 { font-size: 20px; }
  main { padding: 22px 16px 44px; }
}