.site-header {
    position: fixed;
    z-index: 100;
    inset: 0 0 auto;
    height: var(--header-height);
    border-bottom: 1px solid rgba(20, 121, 255, 0.18);
    background: linear-gradient(to bottom, rgba(5, 6, 8, 0.76), rgba(5, 6, 8, 0.42));
    box-shadow: 0 0.35rem 1.5rem rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: background 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.site-header.is-scrolled { border-color: rgba(20, 121, 255, 0.3); background: rgba(8, 9, 11, 0.82); box-shadow: var(--shadow-header); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }

.brand { display: inline-flex; align-items: center; gap: 0.7rem; position: relative; z-index: 2; }
.brand--header { flex: 0 0 auto; }
.brand__logo { display: block; width: auto; height: 3.25rem; max-width: none; object-fit: contain; }

.nav-toggle { display: grid; z-index: 2; gap: 0.1rem; justify-items: end; padding: 0.5rem 0; border: 0; background: transparent; cursor: pointer; }
.nav-toggle__label { font-size: 0.66rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.nav-toggle__icon { display: grid; gap: 0.3rem; width: 1.7rem; }
.nav-toggle__icon span { display: block; height: 0.12rem; background: currentColor; transition: transform var(--transition-medium); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:first-child { transform: translateY(0.21rem) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:last-child { transform: translateY(-0.21rem) rotate(-45deg); }

.primary-nav { position: fixed; inset: 0; display: flex; flex-direction: column; justify-content: center; gap: var(--space-5); padding: calc(var(--header-height) + var(--space-5)) var(--gutter) var(--space-5); background: rgba(8, 9, 11, 0.98); opacity: 0; visibility: hidden; transform: translateY(-1rem); transition: opacity var(--transition-medium), visibility var(--transition-medium), transform var(--transition-medium); }
.primary-nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
.primary-nav__list { display: grid; gap: var(--space-3); margin: 0; padding: 0; list-style: none; }
.primary-nav__list a { font-family: var(--font-sans); font-size: clamp(2rem, 10vw, 3.5rem); font-weight: 800; letter-spacing: -0.02em; line-height: 1; text-transform: uppercase; transition: color 220ms ease; }
.primary-nav__list a:is(:hover, :focus-visible, :active, [aria-current="page"], [aria-current="location"]) { color: var(--color-red-hover); }

.button { display: inline-flex; min-height: 3.25rem; align-items: center; justify-content: center; padding: 0.85rem 1.4rem; border: 1px solid var(--color-red); border-radius: var(--radius-sm); background: var(--color-red); color: #fff; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.08em; line-height: 1; text-transform: uppercase; transition: background 200ms ease, border-color 200ms ease, box-shadow 200ms ease, transform 200ms ease; }
.button:hover { border-color: var(--color-red-hover); background: var(--color-red-hover); box-shadow: 0 0.65rem 1.5rem rgba(227, 34, 45, 0.25); transform: translateY(-0.125rem); }
.button--ghost { border-color: rgba(255, 255, 255, 0.5); background: rgba(8, 9, 11, 0.34); backdrop-filter: blur(0.5rem); }
.button--ghost:hover { border-color: rgba(20, 121, 255, 0.9); background: rgba(20, 121, 255, 0.08); box-shadow: inset 0 0 0 1px rgba(20, 121, 255, 0.22), 0 0.5rem 1.25rem rgba(0, 0, 0, 0.18); }
.button--compact { align-self: flex-start; }
.text-link { display: inline-flex; align-items: center; gap: var(--space-2); padding-block: 0.75rem; font-size: 0.8rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; }
.text-link span { color: var(--color-blue); font-size: 1.2rem; transition: transform var(--transition-fast); }
.text-link:hover span { transform: translateX(0.25rem); }

.foundation-panel { display: grid; grid-template-columns: 1fr; gap: var(--space-3); margin-top: var(--space-6); }
.foundation-panel span { display: block; min-height: 7rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: linear-gradient(135deg, rgba(255,255,255,0.035), transparent); }

.site-footer { padding-top: var(--space-6); border-top: 1px solid var(--color-border); background: #050608; }
.site-footer__inner { display: grid; align-items: center; gap: var(--space-5); }
.brand--footer { justify-self: start; }
.brand__logo--footer { width: min(20rem, 100%); height: auto; max-width: 100%; object-fit: contain; }
.site-footer__links { display: grid; gap: 0.75rem; margin: 0; padding: 0; color: var(--color-text-muted); list-style: none; }
.site-footer__links a:hover, .site-footer__bottom a:hover { color: var(--color-text); }
.site-footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); margin-top: var(--space-7); padding-block: var(--space-4); border-top: 1px solid var(--color-border); color: var(--color-text-muted); font-size: 0.78rem; }
.site-footer__bottom p { margin: 0; }

@media (min-width: 40rem) {
    .foundation-panel { grid-template-columns: repeat(3, 1fr); }
    .foundation-panel span { min-height: 11rem; }
    .site-footer__inner { grid-template-columns: 1fr auto; }
    .site-footer__links { grid-auto-flow: column; align-items: center; gap: clamp(1.25rem, 3vw, 2.5rem); }
}

@media (min-width: 64rem) {
    body.nav-open { overflow: auto; }
    .nav-toggle { display: none; }
    .primary-nav { position: static; flex-direction: row; align-items: center; justify-content: flex-end; gap: var(--space-5); padding: 0; background: transparent; opacity: 1; visibility: visible; transform: none; }
    .primary-nav__list { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2rem); }
    .primary-nav__list a { position: relative; padding-block: 1rem; font-family: var(--font-body); font-size: 0.72rem; letter-spacing: 0.08em; }
    .primary-nav__list a::after { content: ""; position: absolute; right: 100%; bottom: 0.7rem; left: 0; height: 0.12rem; background: var(--color-red); transition: right 220ms ease; }
    .primary-nav__list a:is(:hover, :focus-visible, :active, [aria-current="page"], [aria-current="location"])::after { right: 0; }
    .button--compact { min-height: 2.7rem; padding-inline: 1rem; }
    .brand__logo { width: auto; height: 4.25rem; }
    .brand__logo--footer { width: 24rem; height: auto; }
}