/* ============================================================================
   Shared marketing header
   ----------------------------------------------------------------------------
   Used by the static marketing pages (landing, demo) and by every
   worker-rendered public page (`cf/views.js` -> publicLayout/authLayout), so the
   navigation is byte-for-byte the same everywhere.

   It is self-contained on purpose: it does not depend on landing.css or
   app.css tokens, and its button/icon rules are scoped to `.site-header` so the
   two stylesheets cannot make the same header look different on different
   routes. Change the header here and every page follows.
   ========================================================================== */

:root { --header-height: 76px; }

.site-header {
  --hdr-ink: #0a1a2f;
  --hdr-ink-2: #14263f;
  --hdr-line: #e1e7f0;
  --hdr-line-strong: #c9d4e3;
  --hdr-paper-3: #f1f4f9;
  --hdr-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(253, 253, 255, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--hdr-ease), box-shadow 200ms var(--hdr-ease), background-color 200ms var(--hdr-ease);
}
.site-header.is-scrolled {
  background: rgba(253, 253, 255, 0.9);
  border-bottom-color: var(--hdr-line);
  box-shadow: 0 10px 30px -24px rgba(10, 26, 47, 0.35);
}

.site-header .nav-shell {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: 1220px;
  height: 100%;
  margin-inline: auto;
  padding-inline: clamp(20px, 4.4vw, 44px);
}

.site-header .brand { display: inline-flex; align-items: center; flex: none; }
.site-header .brand img { width: 126px; height: auto; }

.site-header .site-nav { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.site-header .site-nav a {
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--hdr-ink-2);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 160ms var(--hdr-ease), color 160ms var(--hdr-ease);
}
.site-header .site-nav a:hover { background: var(--hdr-paper-3); color: var(--hdr-ink); }
.site-header .site-nav a[aria-current='page'] { color: var(--hdr-ink); font-weight: 600; }

.site-header .nav-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.site-header .nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--hdr-line);
  border-radius: 10px;
  background: #fff;
  color: var(--hdr-ink);
  cursor: pointer;
}
.site-header .nav-toggle .icon { width: 20px; height: 20px; }
.site-header .nav-toggle-close { display: none; }
.site-header .nav-mobile-only { display: none; }
.site-header.nav-open .nav-toggle-open { display: none; }
.site-header.nav-open .nav-toggle-close { display: block; }
.site-header .nav-actions .nav-cta { display: inline-flex; }

/* Icons (the static pages use an inline sprite; the worker pages inline paths) */
.site-header .icon {
  width: 1.1em;
  height: 1.1em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Buttons: scoped copies of the marketing button, so app.css cannot restyle
   them blue-and-small on the worker-rendered pages. */
.site-header .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 50px;
  padding: 0 1.3rem;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 180ms var(--hdr-ease), background-color 180ms var(--hdr-ease),
    border-color 180ms var(--hdr-ease), box-shadow 180ms var(--hdr-ease), color 180ms var(--hdr-ease);
}
.site-header .btn .icon { transition: transform 200ms var(--hdr-ease); }
.site-header .btn:hover .icon { transform: translateX(2px); }

.site-header .btn--primary {
  background: var(--hdr-ink);
  color: #fff;
  box-shadow: 0 14px 30px -16px rgba(10, 26, 47, 0.7);
}
.site-header .btn--primary:hover { background: #13304f; transform: translateY(-1px); }
.site-header .btn--primary:active { transform: translateY(0); }

.site-header .btn--ghost {
  background: rgba(255, 255, 255, 0.7);
  border-color: var(--hdr-line-strong);
  color: var(--hdr-ink);
}
.site-header .btn--ghost:hover { background: #fff; border-color: var(--hdr-ink); transform: translateY(-1px); }

.site-header .btn--sm { min-height: 40px; padding: 0 1rem; font-size: 0.85rem; border-radius: 10px; }

@media (max-width: 900px) {
  :root { --header-height: 68px; }

  .site-header .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px clamp(20px, 4.4vw, 44px) 22px;
    background: #fdfdff;
    border-bottom: 1px solid var(--hdr-line);
    box-shadow: 0 24px 40px -30px rgba(10, 26, 47, 0.4);
  }
  .site-header .site-nav.is-open { display: flex; }
  .site-header .site-nav a { padding: 12px 10px; font-size: 1rem; }
  .site-header .site-nav .nav-mobile-only { display: block; font-weight: 600; }
  .site-header .nav-toggle { display: inline-flex; }
  .site-header .nav-actions .nav-cta { display: none; }
  .site-header .nav-shell { gap: 12px; }
}

@media (forced-colors: active) {
  .site-header { background: Canvas; border-bottom-color: CanvasText; }
  .site-header .site-nav a { color: LinkText; }
  .site-header .nav-toggle { background: Canvas; border-color: CanvasText; color: CanvasText; }
  .site-header .btn { border-color: ButtonText; background: Canvas; color: ButtonText; }
  .site-header .btn--primary { background: ButtonText; color: Canvas; }
  .site-header .brand img { forced-color-adjust: none; }
}