.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: calc(0.75rem + env(safe-area-inset-top)) max(1rem, env(safe-area-inset-left)) 0.75rem max(1rem, env(safe-area-inset-right));
    background: rgba(246, 244, 236, 0.88);
    border-bottom: 1px solid rgba(223, 217, 204, 0.85);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.55) inset;
    backdrop-filter: blur(16px) saturate(1.15);
}

.brand {
    flex: 0 0 auto;
    color: var(--accent-strong);
    font-size: 1.05rem;
    font-weight: 850;
    text-decoration: none;
    letter-spacing: -0.045em;
}

.site-nav {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
    display: none;
}

.site-nav a {
    flex: 0 0 auto;
    min-height: 2.35rem;
    display: inline-flex;
    align-items: center;
    padding: 0.55rem 0.78rem;
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
    transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.site-nav a[aria-current="page"],
.site-nav a:hover,
.site-nav a:focus-visible {
    background: var(--accent);
    color: #fff;
}

.site-nav a:active {
    transform: translateY(1px);
}

.page-shell {
    width: min(1080px, 100%);
    margin: 0 auto;
    padding: 1rem max(1rem, env(safe-area-inset-left)) calc(2rem + env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-right));
}

.page-heading,
.page-header,
.hero {
    margin: 0 0 1rem;
}

.page-heading h1,
.page-header h1,
.hero h1 {
    margin: 0;
    color: var(--accent-strong);
    font-size: clamp(2rem, 9vw, 4rem);
    line-height: 0.96;
    letter-spacing: -0.07em;
}

.page-heading h1,
.page-header h1 {
    font-size: clamp(2rem, 8vw, 3.2rem);
}

.page-heading p,
.page-header p,
.hero p {
    max-width: 42rem;
}

.page-heading p:last-child,
.page-header p:last-child,
.hero p:last-child {
    margin-bottom: 0;
}

.split-heading {
    display: grid;
    gap: 1rem;
}

.grid {
    display: grid;
    gap: 1rem;
}

.cards-grid {
    grid-template-columns: 1fr;
}

@media (max-width: 700px) {
    .site-header {
        display: block;
    }

    .brand {
        display: inline-block;
        margin-bottom: 0.65rem;
    }

    .site-nav {
        margin: 0 -1rem;
        padding: 0 1rem;
        scroll-padding-inline: 1rem;
    }
}

@media (min-width: 720px) {
    .page-shell {
        padding: 2rem 1.25rem 3rem;
    }

    .split-heading {
        grid-template-columns: 1fr auto;
        align-items: end;
    }

    .cards-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 980px) {
    .cards-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}