/* ==========================================================================
   Site header — Roadnote demo pages (demo/*.html)
   Announcement bar + main header + full-screen mobile menu.
   Markup: partials/site-header.html      Behaviour: js/components/site-header.js
   ≥ 960px : inline navigation
   < 960px : "Menu" button opens #mobile-nav
   ========================================================================== */

/* Announcement bar ------------------------------------------------------- */
.announcement {
  background: var(--inverse);
  color: var(--on-inverse);
  font-size: 14px;
}

.announcement__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 10px var(--gutter);
  text-align: center;
}

.announcement__tag {
  padding: 2px 8px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
}

.announcement__link {
  color: inherit;
  font-weight: 600;
  white-space: nowrap;
}

.announcement__link:hover {
  color: inherit;
}

/* Header ----------------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklab, var(--canvas) 88%, transparent);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px var(--gutter);
}

/* Logo */
.site-logo {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--ink);
}

.site-logo__mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--ink);
}

.site-logo__mark::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-bottom: 12px solid var(--canvas);
}

.site-logo__name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.02em;
}

/* Inline navigation */
.site-nav {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  min-width: 0;
  height: 40px;
  overflow: hidden;
}

.site-nav__link {
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav__link[aria-current="page"] {
  background: var(--surface-2);
}

/* Right-hand actions */
.site-header__actions {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 8px;
}

.site-header__login {
  padding: 10px 12px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__demo {
  padding: 10px 16px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__cta {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--action);
  color: var(--on-action);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__cta:hover {
  background: var(--action-hover);
  color: var(--on-action);
}

/* Menu button (mobile only) */
.site-header__menu-btn {
  display: none;
  min-width: 44px;
  min-height: 44px;
  margin-left: auto;
  padding: 0 16px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 600;
}

@media (max-width: 959px) {
  .site-nav,
  .site-header__actions {
    display: none;
  }

  .site-header__menu-btn {
    display: inline-block;
  }
}

/* Mobile menu (full-screen dialog) --------------------------------------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  padding: 16px var(--gutter) var(--gutter);
  overflow: auto;
  background: var(--canvas);
  color: var(--ink);
  animation: pop .24s ease-out;
}

.mobile-nav__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 52px;
}

.mobile-nav__title {
  font-family: var(--font-display);
  font-size: 21px;
}

.mobile-nav__close {
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 600;
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
  margin-top: 24px;
}

.mobile-nav__link {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -.03em;
  text-decoration: none;
}

.mobile-nav__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
  padding-top: 24px;
}

.mobile-nav__cta,
.mobile-nav__demo {
  padding: 16px;
  border-radius: 999px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}

.mobile-nav__cta {
  background: var(--action);
  color: var(--on-action);
  font-size: 17px;
}

.mobile-nav__cta:hover {
  color: var(--on-action);
}

.mobile-nav__demo {
  border: 1px solid var(--line-2);
}

.mobile-nav__login {
  padding: 12px;
  font-weight: 600;
  text-align: center;
}