/* ============================================================
   COMPONENT: Header (Navbar + Mobile Nav)
   Sitemap: 01 — Header · Logo · Nav · CTA Sticky
   Cross-platform: smooth mobile overlay transition
   ============================================================ */

/* ── Fixed header ────────────────────────────────────────── */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px var(--section-pad-x);
  transition: all .35s ease;
}

#header.scrolled {
  padding: 13px var(--section-pad-x);
  background: rgba(22, 22, 22, 0.9);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* ── Logo ────────────────────────────────────────────────── */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-primary);
  /* Touch-friendly tap area */
  min-height: var(--touch-min);
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--orange);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--text-primary);
}

.logo-text {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.logo-text span {
  color: var(--orange);
}

/* ── Desktop navigation ──────────────────────────────────── */
nav.desk {
  display: flex;
  align-items: center;
  gap: 6px;
}

nav.desk a {
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  padding: 8px 13px;
  border-radius: 8px;
  transition: color .2s, background .2s;
  min-height: var(--touch-min);
  display: inline-flex;
  align-items: center;
}

nav.desk a:hover {
  color: var(--text-primary);
  background: var(--glass-bg-hover);
}

.nav-cta {
  background: var(--orange) !important;
  color: var(--text-primary) !important;
  font-weight: 700 !important;
  padding: 9px 18px !important;
  border-radius: var(--radius-btn) !important;
  transition: background .2s, transform .15s !important;
}

.nav-cta:hover {
  background: var(--orange-hover) !important;
  transform: scale(0.98) !important;
}

/* ── Hamburger ───────────────────────────────────────────── */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  /* 44px touch target */
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background .2s;
}

.hamburger:active {
  background: rgba(255, 255, 255, 0.08);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all .3s ease;
}

/* ── Mobile navigation overlay (smooth transition) ───────── */
.mnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(8, 8, 8, 0.97);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: var(--sp-4xl) var(--sp-lg);
  /* Smooth open/close instead of display:none toggle */
  display: flex;
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s ease, visibility .35s ease;
}

.mnav.open {
  opacity: 1;
  visibility: visible;
}

.mnav a {
  font-size: clamp(22px, 5vw, 28px);
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  transition: color .2s, transform .2s;
  min-height: var(--touch-min);
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 10px;
}

.mnav a:hover,
.mnav a:active {
  color: var(--orange);
  transform: scale(1.04);
}

.mnav-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
  width: var(--touch-min);
  height: var(--touch-min);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  transition: background .2s, border-color .2s;
}

.mnav-close:active {
  background: rgba(255, 73, 0, 0.15);
  border-color: var(--orange-border);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  nav.desk { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 480px) {
  #header { padding: 14px 16px; }
  #header.scrolled { padding: 10px 16px; }
  .logo-text { font-size: 16px; }
}