/* site.css — shared site chrome: header, nav, footer, buttons.
   Loaded by every static page (and both build_guides.py templates) so the
   navbar, wordmark and footer are pixel-identical everywhere. Page-specific
   styles stay in each page's own <style> block; this file owns only the
   chrome and is deliberately namespaced (.site-header, .site-footer, .s-btn,
   .shell) so per-page element selectors cannot restyle it. */

:root {
  --paper:#F7F5EF; --paper-deep:#EFECE3; --ink:#191813; --ink-soft:#5C5A52;
  --rule:#D9D5C9; --brand:#24405E; --brand-deep:#172C42; --mark:#F5D547;
  --action:#B3372B; --warning:#B97A1C; --ok:#2E7D4F; --na:#8E8C85;
  --serif:'Fraunces',Georgia,serif; --sans:'Public Sans',system-ui,sans-serif;
  --mono:'Spline Sans Mono',ui-monospace,monospace;
}

.shell { max-width: 1080px; margin: 0 auto; padding: 0 1.75rem; }

/* ---- Buttons (pill shape, reserved for actions) ---- */
.s-btn { font-family: var(--sans); font-size: 0.88rem; font-weight: 500; line-height: 1.2; border-radius: 999px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 0.45rem; transition: background 0.15s, border-color 0.15s, color 0.15s; }
.s-btn-primary { background: var(--brand); color: #fff; padding: 0.65rem 1.4rem; border: 1px solid var(--brand); }
.s-btn-primary:hover { background: var(--brand-deep); }
.s-btn-ghost { background: none; color: var(--ink); border: 1px solid var(--rule); padding: 0.65rem 1.3rem; }
.s-btn-ghost:hover { border-color: var(--ink-soft); }

/* ---- Wordmark ---- */
/* Scoped under the chrome containers (higher specificity than any page's own
   .wordmark rule) so the logo renders identically on every page. */
.site-header .wordmark, .site-footer .wordmark { font-family: var(--serif); font-size: 1.35rem; font-weight: 500; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; flex-shrink: 0; border: none; }
.site-header .wordmark .dot, .site-footer .wordmark .dot { color: var(--ok); }

/* ---- Header ---- */
/* display/height/padding set explicitly to beat leftover per-page
   `header { ... }` element rules. */
.site-header { display: block; border-bottom: 1px solid var(--rule); position: sticky; top: 0; background: var(--paper); z-index: 40; max-width: none; margin: 0; padding: 0; height: auto; }
.site-header .head-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 2rem; position: relative; max-width: 1080px; margin: 0 auto; padding: 0 1.75rem; }
.site-nav { display: flex; align-items: center; gap: 2rem; flex: 1; }
.site-nav a { border: none; }
.nav-links { display: flex; align-items: center; gap: 0.25rem; flex: 1; }
.nav-item { position: relative; display: flex; align-items: center; }
.nav-item > button { font-family: var(--sans); font-size: 0.88rem; color: var(--ink-soft); background: none; border: none; cursor: pointer; padding: 0.5rem 0.6rem; display: flex; align-items: center; gap: 0.35rem; }
.nav-item > button:hover, .nav-item > button[aria-expanded="true"] { color: var(--ink); }
.nav-item .caret { font-size: 0.6rem; transition: transform 0.12s; }
.nav-item > button[aria-expanded="true"] .caret { transform: rotate(180deg); }
.nav-menu { position: absolute; top: 100%; left: 0; margin-top: 14px; min-width: 16rem; background: var(--paper); border: 1px solid var(--rule); box-shadow: 0 8px 20px rgba(25,24,19,.08); padding: 0.6rem; display: none; flex-direction: column; gap: 0.1rem; }
.nav-item.open .nav-menu { display: flex; }
.nav-menu a { display: block; padding: 0.55rem 0.7rem; border-radius: 3px; text-decoration: none; color: var(--ink); font-size: 0.86rem; font-family: var(--sans); }
.nav-menu a:hover { background: var(--paper-deep); }
.nav-menu a .d { display: block; font-size: 0.76rem; color: var(--ink-soft); margin-top: 0.15rem; }
.tag-beta { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.05em; color: var(--warning); border: 1px solid var(--warning); padding: 1px 6px; border-radius: 999px; margin-left: 0.35rem; vertical-align: 1px; }
.nav-account { display: flex; align-items: center; gap: 1.4rem; flex-shrink: 0; }
.nav-account a.login { font-size: 0.88rem; font-family: var(--sans); color: var(--ink-soft); text-decoration: none; }
.nav-account a.login:hover { color: var(--ink); }

/* Burger (mobile only) */
.nav-burger { display: none; background: none; border: none; cursor: pointer; padding: 0.6rem 0 0.6rem 0.6rem; flex-direction: column; gap: 5px; }
.nav-burger span { display: block; width: 20px; height: 2px; background: var(--ink); transition: transform 0.15s, opacity 0.15s; }
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .site-header .head-inner { gap: 1rem; }
  .nav-burger { display: flex; }
  .site-nav { display: none; }
  .site-header.open .site-nav { display: block; position: absolute; top: 100%; left: 0; right: 0; background: var(--paper); border-bottom: 1px solid var(--rule); padding: 0.75rem 1.75rem 1.5rem; max-height: calc(100vh - 64px); overflow-y: auto; }
  .nav-links { display: block; }
  .nav-item { display: block; }
  .nav-item > button { pointer-events: none; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft); padding: 1.1rem 0 0.35rem; }
  .nav-item .caret { display: none; }
  .nav-menu { display: flex; position: static; margin: 0; border: none; box-shadow: none; padding: 0; min-width: 0; background: none; }
  .nav-menu a { padding: 0.55rem 0; }
  .nav-account { margin-top: 1.4rem; padding-top: 1.4rem; border-top: 1px solid var(--rule); gap: 1.2rem; }
}

/* ---- Footer ---- */
.site-footer { background: var(--paper-deep); border-top: 1px solid var(--rule); margin-top: auto; padding: 3.5rem 0 2rem; font-family: var(--sans); }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2.5rem; }
.foot-brand p { font-size: 0.82rem; color: var(--ink-soft); line-height: 1.6; margin: 0.9rem 0 0; max-width: 26rem; }
.foot-col h3 { font-family: var(--mono); font-size: 0.66rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-soft); margin: 0 0 0.9rem; }
.foot-col a { display: block; font-size: 0.86rem; color: var(--ink); text-decoration: none; padding: 0.28rem 0; border: none; }
.foot-col a:hover { color: var(--brand); }
.foot-legal { display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; border-top: 1px solid var(--rule); margin-top: 2.75rem; padding-top: 1.5rem; font-size: 0.74rem; color: var(--ink-soft); }
.foot-legal a { color: var(--ink-soft); }

@media (max-width: 860px) {
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .foot-brand { grid-column: 1 / -1; }
}