/* Header / Navigation */
.site-header{
  position: fixed;
  inset: 0 0 auto 0;
  /* Keep header/nav above all sections (especially mobile drawers/overlays) */
  z-index: 1000;
  background: transparent;
  transition: background var(--dur-2) var(--ease-standard), border-color var(--dur-2) var(--ease-standard);
}
.site-header.scrolled{
  background: rgba(0,0,0,.22);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
}
.header-inner{
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding-block: var(--header-pad-y);
  transition: min-height var(--dur-2) var(--ease-standard), padding var(--dur-2) var(--ease-standard);

  /* Ensure the hamburger remains clickable even when the overlay is visible */
  position: relative;
  z-index: 1002;
}

.site-header.scrolled .header-inner{
  min-height: var(--header-h-compact);
  padding-block: var(--header-pad-y-compact);
}
.brand img{
  width: var(--brand-w);
  height: auto;
  transition: width var(--dur-2) var(--ease-standard);
}
.site-header.scrolled .brand img{
  width: var(--brand-w-compact);
}

.nav-toggle-btn{
  width: 46px;
  height: 40px;
  display: inline-grid;
  place-content: center;
  gap: 6px;
  border: 1px solid var(--border-soft);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--dur-1) var(--ease-out), background var(--dur-2) var(--ease-standard), border-color var(--dur-2) var(--ease-standard);
}
.nav-toggle-btn:hover{ background: rgba(255,255,255,.07); border-color: var(--border); }
.nav-toggle-btn:active{ transform: scale(.98); }
.nav-toggle-btn span{
  width: 18px;
  height: 2px;
  background: var(--fg);
  border-radius: 2px;
}

.main-nav{
  --nav-w: min(360px, 86vw);
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: var(--nav-w);
  padding: calc(var(--header-h) + 18px) 18px 18px;
  background: rgba(13,15,18,.98);
  border-left: 1px solid var(--border-soft);
  transform: translateX(110%);
  transition: transform var(--dur-3) var(--ease-out);
  box-shadow: var(--shadow-md);

  /* Above overlay */
  z-index: 1001;
}
.main-nav.is-open{ transform: translateX(0); }
.main-nav ul{ list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.main-nav a{
  display: block;
  padding: 12px 12px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  color: var(--fg);
  font-weight: 500;
  letter-spacing: .3px;
  transition: background var(--dur-2) var(--ease-standard), border-color var(--dur-2) var(--ease-standard);
}
.main-nav a:hover{ background: rgba(255,255,255,.06); border-color: var(--border-soft); }

.nav-overlay{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-2) var(--ease-standard);

  /* Below drawer, above page */
  z-index: 1000;
}
.nav-overlay.is-open{ opacity: 1; pointer-events: auto; }

/* Desktop nav */
@media (min-width: 960px){
  .nav-toggle-btn{ display: none; }
  .main-nav{
    position: static;
    transform: none;
    height: auto;
    width: auto;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .nav-overlay{ display: none; }
  .main-nav ul{ display: flex; align-items: center; gap: 6px; }
  .main-nav a{ padding: 10px 12px; }
}

/* Buttons */
.btn-cta{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--fg);
  font-weight: 600;
  letter-spacing: .25px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-2) var(--ease-out), background var(--dur-2) var(--ease-standard), border-color var(--dur-2) var(--ease-standard);
}
.btn-cta:hover{ background: rgba(255,255,255,.10); border-color: rgba(255,255,255,.22); transform: translateY(-1px); }
.btn-cta:active{ transform: translateY(0); }
.btn-cta .arrow{ transition: transform var(--dur-2) var(--ease-out); }
.btn-cta:hover .arrow{ transform: translateX(2px); }

/* Badges */
.badge{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-soft);
  background: rgba(255,255,255,.04);
  font-size: .85rem;
}

/* Form elements */
input, textarea, button{ font: inherit; color: inherit; }
input, textarea{
  width: 100%;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius-md);
  padding: 12px 12px;
  outline: none;
  transition: border-color var(--dur-2) var(--ease-standard), background var(--dur-2) var(--ease-standard);
}
input:focus, textarea:focus{ border-color: rgba(255,255,255,.30); background: rgba(255,255,255,.08); }
textarea{ resize: vertical; min-height: 120px; }

/* Reveal (motion) */
[data-reveal]{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
  will-change: opacity, transform;
}
.is-revealed[data-reveal]{ opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce){
  [data-reveal]{ opacity: 1; transform: none; }
}