/* ==========================================================================
   header.css — แถบข้อมูลด้านบน / ส่วนหัว / เมนู
   ========================================================================== */

/* ---------- Top bar ---------- */
.topbar {
  background: var(--c-navy-2);
  color: #d8e5f7;
  font-size: 13px;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 40px;
}
.topbar__list { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; color: inherit; }
.topbar__item svg { width: 14px; height: 14px; flex: none; opacity: .85; }
a.topbar__item:hover { color: #fff; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s, border-color .25s;
}
.site-header.is-stuck { border-color: var(--c-line); box-shadow: var(--shadow-sm); }
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: var(--header-h);
}

.site-branding { display: flex; flex: none; align-items: center; gap: 12px; color: var(--c-navy); }
.site-branding img { width: auto; height: 46px; flex: none; }
.site-branding__text { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.site-branding__name,
.site-branding__tag { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.site-branding__name { font-size: 17px; font-weight: 700; }
.site-branding__tag { font-size: 12px; color: var(--c-muted); }

/* ---------- Main navigation ---------- */
.main-nav { margin-left: auto; }
.main-nav__list { display: flex; gap: 4px; }
.main-nav__link {
  position: relative;
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-navy);
  white-space: nowrap;
}
.main-nav__link::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--c-primary);
  transform: scaleX(0);
  transition: transform .25s var(--ease);
}
.main-nav__link:hover,
.main-nav__link.is-active { color: var(--c-primary); }
.main-nav__link:hover::after,
.main-nav__link.is-active::after { transform: scaleX(1); }

.site-header__cta { flex: none; }

/* ---------- Hamburger ---------- */
.menu-toggle {
  display: none;
  width: 44px; height: 44px;
  margin-left: auto;
  padding: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: #fff;
}
.menu-toggle span {
  display: block;
  width: 20px; height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: var(--c-navy);
  transition: transform .25s, opacity .25s;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.topbar p { margin: 0; }