/* Shared site header nav (landing + how-to pages). Behaviour lives in js/site-nav.js.
 *
 * Markup: <header class="cz-header [cz-header--light] is-compact"> > .cz-header-inner >
 *   .cz-brand, .cz-menu-button, nav.cz-nav (ul.cz-nav-links, .cz-nav-actions), .cz-header-cta
 *
 * Nothing wraps. js/site-nav.js adds .is-compact to the header when the full row does not
 * fit (longer BM labels, extra links), so there is no fixed breakpoint to maintain.
 * Pages own the header background, brand size and inner width; this file owns the nav.
 * Themes are colour tokens only: dark is the default, .cz-header--light for light pages.
 */
.cz-header {
  --nav-fg: #FBFAF7;
  --nav-fg-muted: #B8C2BC;
  --nav-hover-bg: rgba(255, 255, 255, .08);
  --nav-accent: #48A848;
  --nav-line: rgba(255, 255, 255, .22);
  --nav-pill-bg: #FBFAF7;
  --nav-pill-fg: #101820;
  --nav-panel-bg: #FDFDFC;
  --nav-panel-fg: #101820;
  --nav-panel-muted: #4A5560;
  --nav-panel-hover: #F9F7F3;
  --nav-drawer-bg: #101820;
  --nav-drawer-fg: #FBFAF7;
  --nav-drawer-muted: #B8C2BC;
  --nav-drawer-line: #26313A;
  --nav-drawer-accent: #48A848;
  --nav-drawer-pill-bg: #FBFAF7;
  --nav-drawer-pill-fg: #101820;
  --nav-drawer-shadow: 0 16px 24px rgba(0, 0, 0, .4);
}
.cz-header--light {
  --nav-fg: #101820;
  --nav-fg-muted: rgba(16, 24, 32, .6);
  --nav-hover-bg: rgba(16, 24, 32, .06);
  --nav-accent: #2E7F36;
  --nav-line: rgba(16, 24, 32, .2);
  --nav-pill-bg: #101820;
  --nav-pill-fg: #FBFAF7;
  --nav-drawer-bg: #FDFDFC;
  --nav-drawer-fg: #101820;
  --nav-drawer-muted: #4A5560;
  --nav-drawer-line: #E3E6E1;
  --nav-drawer-accent: #2E7F36;
  --nav-drawer-pill-bg: #101820;
  --nav-drawer-pill-fg: #FBFAF7;
  --nav-drawer-shadow: 0 1px 2px rgba(16, 24, 32, .06), 0 12px 24px -10px rgba(16, 24, 32, .22);
}

.cz-header-inner { display: flex; align-items: center; gap: 24px; }
.cz-brand { display: flex; flex-shrink: 0; margin-right: auto; }

/* Desktop row */
.cz-nav { display: flex; align-items: center; gap: 16px; }
.cz-nav-links { display: flex; align-items: center; gap: 2px; margin: 0; padding: 0; list-style: none; }
.cz-nav-links > li > a, .cz-dd-trigger { display: inline-flex; align-items: center; gap: 6px; padding: 10px 12px; border: 0; border-radius: 10px; background: none; font-family: inherit; font-size: 15px; font-weight: 500; line-height: 1.2; white-space: nowrap; text-decoration: none; color: var(--nav-fg); cursor: pointer; transition: background-color .2s, color .2s; }
.cz-nav-links > li > a:hover, .cz-dd-trigger:hover, .cz-dd-trigger[aria-expanded="true"] { background: var(--nav-hover-bg); }
.cz-nav-links > li > a[aria-current="page"] { font-weight: 600; box-shadow: inset 0 -2px 0 var(--nav-accent); border-radius: 10px 10px 0 0; }
.cz-dd-trigger svg { transition: transform .2s; }
.cz-dd-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }
.cz-dd { position: relative; }
.cz-dd-panel { position: absolute; top: calc(100% + 10px); left: 50%; translate: -50% 0; z-index: 2; min-width: 280px; margin: 0; padding: 8px; list-style: none; border-radius: 14px; background: var(--nav-panel-bg); box-shadow: 0 1px 2px rgba(16, 24, 32, .06), 0 12px 24px -10px rgba(16, 24, 32, .22); }
.cz-dd-panel[hidden] { display: none; }
.cz-dd-panel a { display: flex; flex-direction: column; padding: 10px 12px; border-radius: 10px; text-decoration: none; color: var(--nav-panel-fg); font-weight: 600; font-size: 15px; line-height: 1.35; }
.cz-dd-panel a:hover { background: var(--nav-panel-hover); }
.cz-dd-panel a[aria-current="page"] { background: var(--nav-panel-hover); }
.cz-dd-panel small { font-weight: 400; font-size: 13px; color: var(--nav-panel-muted); }
.cz-nav-actions { display: flex; align-items: center; gap: 16px; }
.cz-lang { display: inline-flex; padding: 2px; border: 1px solid var(--nav-line); border-radius: 999px; }
.cz-lang a { padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; line-height: 1.4; text-decoration: none; white-space: nowrap; color: var(--nav-fg-muted); }
.cz-lang a:hover { color: var(--nav-fg); }
.cz-lang a[aria-current="page"] { background: var(--nav-pill-bg); color: var(--nav-pill-fg); }
.cz-lang-long { display: none; }
.cz-login { font-size: 15px; font-weight: 600; white-space: nowrap; text-decoration: none; color: var(--nav-fg); }
.cz-login:hover { color: var(--nav-accent); }
.cz-header-cta { flex-shrink: 0; white-space: nowrap; }

/* Hamburger */
.cz-menu-button { display: none; width: 44px; height: 44px; padding: 0; border: 1.5px solid var(--nav-line); border-radius: 10px; background: var(--nav-hover-bg); color: var(--nav-fg); cursor: pointer; align-items: center; justify-content: center; transition: border-color .2s, background-color .2s, color .2s; }
.cz-hamburger { position: relative; display: flex; flex-direction: column; justify-content: center; align-items: center; width: 20px; height: 14px; gap: 6px; pointer-events: none; }
.cz-hamburger-bar { display: block; width: 20px; height: 2px; border-radius: 2px; background-color: currentColor; transform-origin: center; transition: transform .25s cubic-bezier(0.4, 0, 0.2, 1); }
.cz-menu-button[aria-expanded="true"] .cz-hamburger-bar:first-child { transform: translateY(4px) rotate(45deg); }
.cz-menu-button[aria-expanded="true"] .cz-hamburger-bar:last-child { transform: translateY(-4px) rotate(-45deg); }

/* Compact: Get started stays in the bar; everything else moves into the drawer.
   Inner goes static so the drawer spans the full header width; children keep stacking above
   any header background layers. */
.is-compact .cz-header-inner { position: static; gap: 12px; }
.is-compact .cz-header-inner > * { position: relative; z-index: 1; }
.is-compact .cz-menu-button { display: inline-flex; order: 3; }
.is-compact .cz-nav { display: none; position: absolute; z-index: 3; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; max-height: calc(100dvh - 72px); overflow-y: auto; padding: 16px 32px 24px; background: var(--nav-drawer-bg); border-bottom: 1px solid var(--nav-drawer-line); box-shadow: var(--nav-drawer-shadow); }
.is-compact .cz-nav.is-open { display: flex; }
.is-compact .cz-nav-links { flex-direction: column; align-items: stretch; }
.is-compact .cz-nav-links > li > a, .is-compact .cz-dd-trigger { width: 100%; justify-content: space-between; padding: 12px 0; font-size: 18px; border-radius: 0; color: var(--nav-drawer-fg); }
.is-compact .cz-nav-links > li > a[aria-current="page"] { box-shadow: none; color: var(--nav-drawer-accent); }
.is-compact .cz-nav-links > li > a:hover, .is-compact .cz-dd-trigger:hover, .is-compact .cz-dd-trigger[aria-expanded="true"] { background: none; color: var(--nav-drawer-accent); }
.is-compact .cz-dd-panel { position: static; translate: none; min-width: 0; padding: 0 0 8px 12px; background: none; box-shadow: none; }
.is-compact .cz-dd-panel a { color: var(--nav-drawer-fg); font-size: 16px; padding: 10px 0; }
.is-compact .cz-dd-panel a:hover, .is-compact .cz-dd-panel a[aria-current="page"] { background: none; color: var(--nav-drawer-accent); }
.is-compact .cz-dd-panel small { color: var(--nav-drawer-muted); }
.is-compact .cz-nav-actions { order: -1; flex-direction: column; align-items: stretch; gap: 12px; padding-bottom: 16px; margin-bottom: 8px; border-bottom: 1px solid var(--nav-drawer-line); }
.is-compact .cz-lang { display: flex; border-color: var(--nav-drawer-line); }
.is-compact .cz-lang a { flex: 1; padding: 8px 10px; text-align: center; font-size: 14px; color: var(--nav-drawer-muted); }
.is-compact .cz-lang a[aria-current="page"] { background: var(--nav-drawer-pill-bg); color: var(--nav-drawer-pill-fg); }
.is-compact .cz-lang-short { display: none; }
.is-compact .cz-lang-long { display: inline; }
.is-compact .cz-login { padding: 10px; text-align: center; border: 1px solid var(--nav-drawer-line); border-radius: 12px; color: var(--nav-drawer-fg); }
@media (max-width: 599px) {
  .is-compact .cz-nav { padding: 16px 20px 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .cz-hamburger-bar, .cz-dd-trigger svg { transition: none !important; }
}