/* Header, scroll progress, mobile menu */
.hdr {
  position: fixed; inset: 0 0 auto 0; z-index: 60; height: var(--nav-h);
  transition: background-color .35s, border-color .35s, backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.hdr.is-scrolled {
  background: rgba(0, 0, 0, .72);
  -webkit-backdrop-filter: saturate(140%) blur(16px);
  backdrop-filter: saturate(140%) blur(16px);
  border-bottom-color: var(--line);
}
.hdr-in { height: 100%; display: flex; align-items: center; gap: 24px; }
.hdr .brand { margin-right: auto; }
.nav ul { display: flex; gap: 6px; }
.nav a {
  position: relative; display: block; padding: 8px 14px; border-radius: var(--r-pill);
  color: var(--muted); font-size: 15px; transition: color .2s;
}
.nav a:hover { color: var(--text); }
.nav a.is-active { color: var(--text); }
.nav a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 1px; height: 2px; border-radius: 2px;
  background: var(--grad-h); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease);
}
.nav a.is-active::after { transform: scaleX(1); }
.hdr-cta { margin-left: auto; }

.hdr-progress {
  position: absolute; left: 0; bottom: -1px; height: 2px; width: 100%;
  background: var(--grad-h); transform-origin: left; transform: scaleX(0);
  box-shadow: 0 0 12px var(--glow); opacity: 0; transition: opacity .3s;
}
.hdr.is-scrolled .hdr-progress { opacity: 1; }

.burger { display: none; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-2); position: relative; }
.burger span { position: absolute; left: 13px; right: 13px; height: 1.6px; background: var(--text); border-radius: 2px; transition: transform .3s var(--ease), top .3s var(--ease); }
.burger span:first-child { top: 17px; }
.burger span:last-child { top: 25px; }
.burger[aria-expanded="true"] span:first-child { top: 21px; transform: rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { top: 21px; transform: rotate(-45deg); }

.mmenu {
  position: fixed; inset: 0; z-index: 55; background: #000;
  padding: calc(var(--nav-h) + 32px) var(--gutter) calc(32px + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; justify-content: space-between; gap: 32px;
  overflow-y: auto;
}
.mmenu::before {
  content: ""; position: absolute; inset: auto -20% -30% -20%; height: 60%; pointer-events: none;
  background: radial-gradient(50% 50% at 50% 50%, rgba(252, 85, 76, .22), transparent 70%);
}
.mmenu nav { display: grid; gap: 4px; position: relative; }
.mmenu nav a {
  font-size: clamp(2rem, 9vw, 2.6rem); font-weight: 500; letter-spacing: -0.03em; padding: 6px 0;
  border-bottom: 1px solid var(--line);
}
.mmenu.is-open nav a { animation: mm-in .5s var(--ease) both; }
.mmenu.is-open nav a:nth-child(2) { animation-delay: .04s; }
.mmenu.is-open nav a:nth-child(3) { animation-delay: .08s; }
.mmenu.is-open nav a:nth-child(4) { animation-delay: .12s; }
.mmenu.is-open nav a:nth-child(5) { animation-delay: .16s; }
@keyframes mm-in { from { opacity: 0; transform: translateY(14px); } }
.mmenu-ctas { display: grid; gap: 12px; position: relative; }
.mmenu-ctas .btn { height: 56px; }

@media (max-width: 899px) {
  .nav, .hdr-cta { display: none; }
  .burger { display: block; }
  .hdr.menu-open { background: #000; border-bottom-color: var(--line); -webkit-backdrop-filter: none; backdrop-filter: none; }
}