/* ==========================================================================
   REISTECH — HEADER
   ========================================================================== */

.site-header{
  position: fixed;
  top: 18px;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  justify-content: center;
  transition: transform .5s var(--ease), top .4s var(--ease);
}

.site-header.is-hidden{
  transform: translateY(-140%);
}

.header-inner{
  width: min(1160px, calc(100% - 40px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 14px 12px 22px;
  border-radius: 999px;
  background: rgba(14, 12, 20, .62);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 12px 40px -18px rgba(0,0,0,.7);
  transition: padding .4s var(--ease), background .4s var(--ease), box-shadow .4s var(--ease);
}

.site-header.is-scrolled .header-inner{
  padding-block: 8px;
  background: rgba(10, 9, 15, .78);
  box-shadow: 0 14px 40px -16px rgba(0,0,0,.85), 0 0 0 1px rgba(124,77,255,.06);
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand img{
  height: 30px;
  width: auto;
}
.brand-mark{
  /* fallback wordmark if logo.png is not yet supplied */
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.01em;
}
.brand-mark span{ color: var(--c-purple); }

.main-nav{
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a{
  position: relative;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--c-text-muted);
  transition: color .3s var(--ease), background .3s var(--ease);
}
.main-nav a:hover{
  color: var(--c-text);
  background: rgba(255,255,255,.05);
}
.main-nav a.is-active{
  color: var(--c-text);
  background: rgba(124,77,255,.14);
}

.header-cta{ display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.menu-toggle{
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--c-border-strong);
  background: transparent;
  align-items: center;
  justify-content: center;
  color: var(--c-text);
  flex-shrink: 0;
}

@media (max-width: 900px){
  .main-nav{ display: none; }
  .menu-toggle{ display: inline-flex; }
  .header-cta .btn-primary span.full{ display: none; }
}

/* --- mobile menu panel --- */
.mobile-menu{
  position: fixed;
  inset: 0;
  z-index: 190;
  background: rgba(6,5,9,.72);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s var(--ease);
}
.mobile-menu.is-open{ opacity: 1; pointer-events: auto; }

.mobile-menu-panel{
  position: absolute;
  top: 90px;
  left: 20px;
  right: 20px;
  background: var(--c-bg-elev);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-l);
  padding: 22px;
  transform: translateY(-16px) scale(.98);
  opacity: 0;
  transition: transform .45s var(--ease), opacity .45s var(--ease);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.8);
}
.mobile-menu.is-open .mobile-menu-panel{
  transform: translateY(0) scale(1);
  opacity: 1;
}

.mobile-menu-panel a{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 6px;
  font-family: var(--f-display);
  font-size: 20px;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-text);
}
.mobile-menu-panel a:last-of-type{ border-bottom: none; }
.mobile-menu-panel a svg{ opacity: .4; width: 16px; height: 16px; }

.mobile-menu-cta{ margin-top: 18px; display: flex; }
.mobile-menu-cta .btn{ width: 100%; }

@media (max-width: 768px) {
  .header-cta .btn-primary {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }
}