/*
  Pingory guides stylesheet (D45).
  Shared by /blog and the four B1 guide pages. Visual language copied from
  /llms-txt-checker so the guide cluster reads as one site:
    - light/dark via html[data-theme]
    - accent #1faa6b (light) / #2bd585 (dark); text on solid accent is always #fff
    - system font stack only, no webfonts, no CDN
    - content column ~760px, code blocks dark on both themes
*/

:root {
  --bg: #f5f8f6;
  --bg-2: #eef3f0;
  --card: #ffffff;
  --border: #dbe4df;
  --accent: #1faa6b;
  --accent-soft: rgba(31, 170, 107, 0.10);
  --text: #16241d;
  --muted: #5d6b63;
  --nav-bg: rgba(245, 248, 246, 0.92);
  --warn: #7a5200;
  --warn-bg: #fdf3da;
  --code-bg: #101815;
  --code-border: #22302a;
  --code-text: #e6efe9;
}

[data-theme="dark"] {
  --bg: #0e1310;
  --bg-2: #151b17;
  --card: #161d18;
  --border: #2a322c;
  --accent: #2bd585;
  --accent-soft: rgba(43, 213, 133, 0.14);
  --text: #e6efe9;
  --muted: #9fb0a6;
  --nav-bg: rgba(14, 19, 16, 0.92);
  --warn: #f0c060;
  --warn-bg: rgba(240, 192, 96, 0.14);
  --code-bg: #0b100d;
  --code-border: #24312b;
  --code-text: #e6efe9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- top navigation ---------- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
}
.brand span { color: var(--accent); }
.spacer { margin-left: auto; }
.btn {
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 14px;
  font-size: .88rem;
  color: var(--text);
  white-space: nowrap;
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn-primary {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
#themeToggle {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  border-radius: 7px;
  padding: 5px 9px;
  line-height: 1.2;
}

/* ---------- layout ---------- */
.wrap { max-width: 760px; margin: 0 auto; padding: 34px 20px 64px; }
.wrap--wide { max-width: 860px; }

.kicker {
  margin: 0 0 8px;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
}
h1 { font-size: 2.02rem; line-height: 1.26; margin: 0 0 12px; letter-spacing: -.01em; }
.meta { margin: 0 0 6px; color: var(--muted); font-size: .88rem; }
.lede { font-size: 1.06rem; margin: 16px 0 0; }

article h2 {
  font-size: 1.34rem;
  line-height: 1.35;
  margin: 42px 0 12px;
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  font-weight: 700;
  scroll-margin-top: 72px;
}
article h3 { font-size: 1.02rem; margin: 24px 0 6px; font-weight: 700; }
p { margin: 0 0 13px; }
ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin: 0 0 7px; }
li > code, p > code, td > code, th > code { font-size: .88em; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 5px;
  font-size: .86em;
  word-break: break-word;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: .84rem;
  line-height: 1.62;
  margin: 0 0 16px;
}
pre code {
  background: none;
  border: 0;
  padding: 0;
  color: var(--code-text);
  font-size: inherit;
  white-space: pre;
  word-break: normal;
}

/* First paragraph under every H2: one sentence a reader (or an answer engine)
   can lift verbatim. Bold enough to read as the section's claim. */
.answer { font-weight: 600; }

/* ---------- tables ---------- */
.tablewrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  margin: 0 0 16px;
}
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: .89rem; }
caption { text-align: left; padding: 13px 15px 0; color: var(--muted); font-size: .82rem; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th {
  background: var(--accent-soft);
  font-weight: 700;
  white-space: nowrap;
  font-size: .84rem;
}
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
tbody th { font-weight: 600; }

/* ---------- boundary / note boxes ---------- */
.boundary {
  border-left: 3px solid var(--warn);
  background: var(--warn-bg);
  border-radius: 0 10px 10px 0;
  padding: 13px 16px;
  margin: 0 0 16px;
  font-size: .93rem;
}
.boundary p:last-child { margin: 0; }
.boundary strong { color: var(--warn); }
aside.note {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 10px;
  padding: 13px 16px;
  margin: 0 0 16px;
  font-size: .9rem;
  color: var(--muted);
}
aside.note p:last-child { margin: 0; }

/* ---------- cards (blog index) ---------- */
.cards { display: grid; gap: 14px; margin: 0 0 18px; }
.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 17px 19px;
  color: var(--text);
}
.card:hover { border-color: var(--accent); text-decoration: none; }
.card h2 {
  font-size: 1.08rem;
  margin: 0 0 6px;
  border: 0;
  padding: 0;
  line-height: 1.4;
}
.card h3 {
  font-size: 1.05rem;
  margin: 0 0 6px;
  line-height: 1.4;
}
.card p { margin: 0; color: var(--muted); font-size: .92rem; }
.card .kicker { margin-bottom: 6px; }

/* closing verification line */
.meta-end { margin-top: 26px; }

/* ---------- CTA ---------- */
.cta {
  background: var(--card);
  border: 1px solid var(--accent);
  border-radius: 14px;
  padding: 22px 22px 24px;
  margin: 30px 0 0;
  text-align: center;
}
.cta h2 {
  border: 0;
  padding: 0;
  margin: 0 0 8px;
  font-size: 1.16rem;
}
.cta p { color: var(--muted); font-size: .93rem; margin: 0 0 14px; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta a.cta-main {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 11px 24px;
  font-weight: 700;
  font-size: .96rem;
}
.cta a.cta-main:hover { text-decoration: none; opacity: .92; }
.cta a.cta-alt {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 22px;
  font-size: .96rem;
  color: var(--text);
}
.cta a.cta-alt:hover { border-color: var(--accent); text-decoration: none; }

/* ---------- related links ---------- */
.related {
  border-top: 1px solid var(--border);
  margin: 36px 0 0;
  padding-top: 18px;
}
.related h2, .related h3 { border: 0; padding: 0; font-size: 1.02rem; margin: 0 0 10px; }
.sources { margin: 30px 0 0; padding: 14px 16px; border-radius: 10px; background: var(--bg-2); }
.sources h3 { border: 0; padding: 0; font-size: .95rem; margin: 0 0 8px; }
.sources ul { padding-left: 20px; margin: 0; font-size: .88rem; line-height: 1.65; }
.sources a { color: var(--accent); }
.related ul { padding-left: 20px; margin: 0; }

/* ---------- FAQ ---------- */
details.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  margin: 0 0 10px;
  padding: 0 16px;
}
details.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding: 13px 0;
  list-style: none;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after { content: '+'; float: right; color: var(--accent); font-weight: 700; }
details.faq-item[open] summary::after { content: '−'; }
details.faq-item p { padding-bottom: 2px; margin-top: 0; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 56px;
  padding: 26px 20px 32px;
  text-align: center;
  color: var(--muted);
  font-size: .88rem;
}
.site-footer nav { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 10px; }
.site-footer p { margin: 0 0 8px; }
.site-footer p:last-child { margin: 0; }

@media (max-width: 760px) {
  .wrap { padding: 26px 16px 52px; }
  h1 { font-size: 1.62rem; }
  article h2 { font-size: 1.2rem; margin-top: 34px; }
  .topnav { padding: 10px 14px; gap: 8px; flex-wrap: wrap; }
  .topnav .btn { padding: 6px 10px; font-size: .82rem; }
  table { min-width: 520px; }
  .tablewrap { -webkit-overflow-scrolling: touch; }
  .cta { padding: 18px 16px 20px; }
  .cta-actions { flex-direction: column; }
  .cta a.cta-main, .cta a.cta-alt { width: 100%; }
}

@media (max-width: 420px) {
  .topnav .brand span { display: none; }
  h1 { font-size: 1.45rem; }
}