/* ============================================================
   Header
   ============================================================ */

.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 50;
    padding: 18px 0;
    transition: background .25s var(--ease), backdrop-filter .25s var(--ease),
                box-shadow .25s var(--ease), padding .25s var(--ease),
                border-color .25s var(--ease);
    border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
    background: var(--header-scroll-bg);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom-color: var(--hair);
    padding: 12px 0;
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.brand-mark {
    height: 36px;
    width: auto;
    transition: height .25s var(--ease);
}

.site-header.is-scrolled .brand-mark { height: 30px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0; padding: 0;
}

.nav-links > li > a {
    display: inline-block;
    padding: 8px 14px;
    color: rgba(var(--tint-rgb), 0.72);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: -0.005em;
    position: relative;
    border-radius: 6px;
}

.nav-links > li > a:hover {
    color: var(--ink);
    background: rgba(var(--tint-rgb), 0.04);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px 9px 18px;
    margin-left: 8px;
    background: var(--maize);
    color: var(--navy) !important;
    font-weight: 600;
    font-size: 13.5px;
    border-radius: 4px;
    border: 1px solid var(--maize);
    transition: background .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}

.nav-cta:hover {
    background: var(--maize-soft);
}

.nav-cta::after {
    content: "→";
    font-family: var(--f-mono);
    font-weight: 400;
}

.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--hair-strong);
    border-radius: 4px;
    padding: 8px 10px;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    width: 18px; height: 1.5px;
    background: var(--ink);
    margin: 4px 0;
}

@media (max-width: 760px) {
    .nav-toggle { display: block; }
    .nav-links {
        position: fixed;
        top: 72px; left: 16px; right: 16px;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 14px;
        background: var(--nav-mobile-bg);
        border: 1px solid var(--hair-strong);
        border-radius: 8px;
        box-shadow: var(--shadow-md);
        backdrop-filter: blur(12px);
        transform: translateY(-8px);
        opacity: 0;
        pointer-events: none;
        transition: transform .25s var(--ease), opacity .25s var(--ease);
    }
    .nav-links.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav-links > li > a { padding: 12px 14px; }
    .nav-cta { margin: 6px 0 0; justify-content: center; }
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 22px;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: -0.005em;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: background .2s var(--ease), color .2s var(--ease),
                border-color .2s var(--ease), transform .2s var(--ease),
                box-shadow .2s var(--ease);
}

.btn .arrow {
    font-family: var(--f-mono);
    font-weight: 400;
    transition: transform .25s var(--ease);
}


.btn-primary {
    background: var(--maize);
    color: var(--navy);
    border-color: var(--maize);
}
.btn-primary:hover {
    background: var(--maize-soft);
}

.btn-ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--hair-strong);
}
.btn-ghost:hover {
    border-color: rgba(var(--tint-rgb), 0.38);
    background: rgba(var(--tint-rgb), 0.03);
}