/* ==========================================================================
   NAVBAR.CSS — Announcement, Topbar, Header, Navbar, Mobile Button, Sticky
   ========================================================================== */

/* ---------- Announcement Bar ---------- */
.announcement{
  height: var(--announce-height);
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
}
.announcement__inner{
  height: 100%;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-size: .85rem; font-weight: 600;
  flex-wrap: wrap;
}
.announcement__link{
  display: inline-flex; align-items: center; gap: 4px;
  font-weight: 700; text-decoration: underline; text-underline-offset: 3px;
}
.announcement__close{
  position: absolute; right: 20px;
  color: #fff; opacity: .8; font-size: 1rem;
}

/* ---------- Topbar ---------- */
.topbar{
  height: var(--topbar-height);
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
  font-size: .82rem;
  color: var(--color-text-muted);
}
.topbar__inner{ height: 100%; display: flex; align-items: center; justify-content: space-between; }
.topbar__left, .topbar__right{ display: flex; align-items: center; gap: 24px; }
.topbar__item{ display: inline-flex; align-items: center; gap: 6px; }
.topbar__item svg{ width: 14px; height: 14px; color: var(--color-primary); }

/* ---------- Header / Navbar ---------- */
.header{
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky; top: 0; z-index: 500;
  transition: box-shadow var(--transition-base), height var(--transition-base);
}
.header.is-sticky{
  box-shadow: var(--shadow-sm);
  height: 68px;
}
.header__inner{
  height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand{ display: flex; align-items: center; gap: 10px; }
.brand__logo{ height: 34px; width: auto; }
.brand__text{ display: flex; flex-direction: column; line-height: 1.1; }
.brand__name{ font-family: var(--font-heading); font-weight: 800; font-size: 1.25rem; color: var(--color-brand); }
.brand__sub{ font-size: .7rem; color: var(--color-secondary); font-weight: 700; letter-spacing: .02em; display: inline-flex; align-items: center; gap: 3px; }
.brand__sub svg{ width: 11px; height: 11px; }

.navbar{ display: flex; align-items: center; gap: 8px; }
.navbar__link{
  position: relative;
  padding: 10px 16px;
  font-weight: 600; font-size: .95rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}
.navbar__link:hover{ color: var(--color-primary); }
.navbar__link.is-active{ color: var(--color-primary); }
.navbar__link.is-active::after{
  content: '';
  position: absolute; left: 16px; right: 16px; bottom: 2px;
  height: 2px; background: var(--color-primary); border-radius: var(--radius-pill);
}

/* ---------- Dropdown (for future submenu) ---------- */
.has-dropdown{ position: relative; }
.dropdown{
  position: absolute; top: calc(100% + 10px); left: 0;
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all var(--transition-fast);
}
.has-dropdown:hover .dropdown{ opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown__link{ display: block; padding: 10px 12px; border-radius: var(--radius-sm); font-size: .9rem; font-weight: 600; }
.dropdown__link:hover{ background: var(--color-bg-soft); color: var(--color-primary); }

/* ---------- Header Actions ---------- */
.header__actions{ display: flex; align-items: center; gap: 12px; }
.theme-toggle{
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--color-bg-soft);
  color: var(--color-text);
  transition: background var(--transition-fast);
}
.theme-toggle:hover{ background: var(--color-border); }
.theme-toggle svg{ width: 18px; height: 18px; }
.theme-toggle .icon-moon{ display: none; }
[data-theme="dark"] .theme-toggle .icon-sun{ display: none; }
[data-theme="dark"] .theme-toggle .icon-moon{ display: inline-flex; }

.hamburger{
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-bg-soft);
}
.hamburger span, .hamburger::before, .hamburger::after{ display: none; }
.hamburger svg{ width: 20px; height: 20px; }

/* ---------- Responsive placeholders (full rules in responsive.css) ---------- */
@media (max-width: 992px){
  .navbar{ display: none; }
  .hamburger{ display: inline-flex; }
  .topbar__left .topbar__item:nth-child(2){ display: none; }
}