/* ============================================================
   Guide pages — the long-form articles.
   Built entirely on the tokens already in styles.css (--bg, --text,
   --line, --blue, --grad, --font-ui …), so these pages inherit the
   site's look instead of inventing a second design system.
   ============================================================ */

.gd { background: var(--bg); color: var(--text); font-family: var(--font-ui); }

/* ---------- top bar ---------- */
.gd-top {
  position: sticky; top: 0; z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 6, 10, 0.82);
  backdrop-filter: blur(14px);
}
.gd-top__in { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }

/* ---------- article frame ---------- */
.gd-article { padding: 34px 0 20px; max-width: 780px; margin: 0 auto; }

.gd-crumbs { font-size: 13px; color: var(--text-3); margin-bottom: 22px; }
.gd-crumbs a { color: var(--text-2); text-decoration: none; border-bottom: 1px solid var(--line-strong); }
.gd-crumbs a:hover { color: var(--text); }

.gd-hero { margin-bottom: 30px; }
.gd-h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.08; letter-spacing: -0.02em; margin: 14px 0 16px;
}
.gd-lead { font-size: 19px; line-height: 1.6; color: var(--text-2); margin: 0 0 16px; }
.gd-meta { font-size: 13px; color: var(--text-3); margin: 0; }

/* ---------- prose ---------- */
.gd-prose { font-size: 17px; line-height: 1.75; color: #dfe4ee; }
.gd-prose h2 {
  font-family: var(--font-display);
  font-size: 26px; line-height: 1.25; letter-spacing: -0.015em;
  margin: 44px 0 14px; padding-top: 26px; border-top: 1px solid var(--line);
}
.gd-prose h2:first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.gd-prose h3 { font-size: 19px; margin: 30px 0 10px; color: var(--text); }
.gd-prose p { margin: 0 0 18px; }
.gd-prose ul, .gd-prose ol { margin: 0 0 20px; padding-left: 22px; }
.gd-prose li { margin-bottom: 9px; }
.gd-prose li::marker { color: var(--blue); }
.gd-prose a { color: var(--blue); text-decoration: none; border-bottom: 1px solid rgba(91, 156, 255, 0.32); }
.gd-prose a:hover { border-bottom-color: var(--blue); }
.gd-prose strong { color: var(--text); font-weight: 600; }
.gd-prose code {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 0.88em; background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 6px; padding: 2px 6px; color: var(--cyan);
}
.gd-prose blockquote {
  margin: 26px 0; padding: 4px 0 4px 20px;
  border-left: 2px solid var(--blue); color: var(--text-2); font-style: italic;
}
.gd-prose blockquote p:last-child { margin-bottom: 0; }

/* a highlighted "try this" prompt block */
.gd-prompt {
  margin: 24px 0; padding: 18px 20px;
  background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--r-md);
  font-size: 16px; line-height: 1.6;
}
.gd-prompt__label {
  display: block; margin-bottom: 8px;
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--blue); font-weight: 600;
}
.gd-prompt p { margin: 0; }

/* ---------- comparison table ---------- */
.gd-table { width: 100%; border-collapse: collapse; margin: 8px 0 24px; font-size: 15px; }
.gd-table th, .gd-table td {
  text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top;
}
.gd-table thead th {
  font-size: 12px; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--text-3); font-weight: 600; border-bottom-color: var(--line-strong);
}
.gd-table tbody tr:hover { background: rgba(255, 255, 255, 0.02); }
.gd-table td:first-child { color: var(--text); font-weight: 500; }
.gd-scroll { overflow-x: auto; margin-bottom: 26px; }
.gd-scroll .gd-table { margin-bottom: 0; }

/* ---------- FAQ ---------- */
.gd-faq { margin-top: 46px; }
.gd-faq > h2 {
  font-family: var(--font-display); font-size: 24px; margin: 0 0 6px; padding-top: 30px;
  border-top: 1px solid var(--line);
}
.gd-faq__item {
  border: 1px solid var(--line); border-radius: var(--r-sm);
  margin-bottom: 10px; background: var(--surface); overflow: hidden;
}
.gd-faq__item summary {
  cursor: pointer; list-style: none; padding: 15px 18px;
  font-size: 16px; font-weight: 600; color: var(--text);
  display: flex; justify-content: space-between; gap: 14px; align-items: center;
}
.gd-faq__item summary::-webkit-details-marker { display: none; }
.gd-faq__item summary::after { content: "+"; color: var(--blue); font-size: 20px; font-weight: 400; line-height: 1; }
.gd-faq__item[open] summary::after { content: "\2013"; }
.gd-faq__body { padding: 0 18px 16px; color: var(--text-2); font-size: 15.5px; line-height: 1.7; }
.gd-faq__body p { margin: 0 0 10px; }
.gd-faq__body p:last-child { margin: 0; }

/* ---------- related guides ---------- */
.gd-related { margin-top: 46px; }
.gd-related > h2 {
  font-family: var(--font-display); font-size: 24px; margin: 0 0 16px;
  padding-top: 30px; border-top: 1px solid var(--line);
}
.gd-rel-grid { display: grid; gap: 12px; }
.gd-rel {
  display: block; padding: 16px 18px; border: 1px solid var(--line); border-radius: var(--r-sm);
  background: var(--surface); text-decoration: none;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.gd-rel:hover { border-color: var(--line-strong); background: var(--surface-2); transform: translateY(-2px); }
.gd-rel strong { display: block; font-size: 16px; color: var(--text); margin-bottom: 4px; font-weight: 600; }
.gd-rel span { font-size: 14px; color: var(--text-2); line-height: 1.55; }

/* ---------- closing CTA ---------- */
.gd-cta {
  margin: 46px 0 0; padding: 28px;
  border: 1px solid var(--line-strong); border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(91, 156, 255, 0.10), rgba(169, 123, 255, 0.05));
}
.gd-cta h2 { font-family: var(--font-display); font-size: 22px; margin: 0 0 8px; }
.gd-cta p { color: var(--text-2); margin: 0 0 18px; font-size: 16px; line-height: 1.6; }
.gd-cta__row { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---------- footer ---------- */
.gd-foot {
  border-top: 1px solid var(--line); margin-top: 60px; padding: 26px 0 44px;
  font-size: 14px; color: var(--text-3);
}
.gd-foot__in { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; }
.gd-foot a { color: var(--text-2); text-decoration: none; }
.gd-foot a:hover { color: var(--text); }
.gd-foot nav { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- light theme ---------- */
@media (prefers-color-scheme: light) {
  .gd-top { background: rgba(255, 255, 255, 0.86); border-bottom-color: rgba(0, 0, 0, 0.10); }
  .gd-prose { color: #262b36; }
  .gd-prose strong, .gd-h1, .gd-faq__item summary, .gd-rel strong { color: #0d1117; }
  .gd-prose h2, .gd-faq > h2, .gd-related > h2 { border-top-color: rgba(0, 0, 0, 0.10); }
  .gd-prompt, .gd-faq__item, .gd-rel { background: #fff; border-color: rgba(0, 0, 0, 0.10); }
  .gd-rel:hover { background: #f6f8fc; }
  .gd-faq__body, .gd-lead { color: #4a5261; }
  .gd-foot { border-top-color: rgba(0, 0, 0, 0.10); }
  .gd-table th, .gd-table td { border-bottom-color: rgba(0, 0, 0, 0.10); }
  .gd-table thead th { border-bottom-color: rgba(0, 0, 0, 0.18); }
}

/* ---------- narrow screens ---------- */
@media (max-width: 640px) {
  .gd-article { padding: 24px 18px 10px; }
  .gd-top__in { height: 60px; }
  .gd-prose { font-size: 16.5px; }
  .gd-cta { padding: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .gd-rel { transition: none; }
  .gd-rel:hover { transform: none; }
}