/* layout.css — header / navigation / footer (page chrome) */

/* ======================================================================
   HEADER + NAV
   ====================================================================== */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    height: var(--header-h);
    display: flex;
    align-items: center;
    transition:
        background-color var(--dur-mid) var(--ease-out),
        border-color var(--dur-mid) var(--ease-out),
        backdrop-filter var(--dur-mid) var(--ease-out);
    border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
    background: color-mix(in srgb, var(--bg-deep) 78%, transparent);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    border-bottom-color: var(--border);
}

.header-inner {
    width: 100%;
    max-width: var(--content-max);
    margin-inline: auto;
    padding-inline: var(--gutter);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    flex-shrink: 0;
    position: relative;
    z-index: 2; /* stay above the full-screen mobile overlay */
}

.brand img {
    height: 52px;
    width: auto;
}

/* ---- Desktop nav ---- */
.main-nav {
    display: flex;
    align-items: center;
    gap: clamp(0.5rem, 2vw, 2rem);
}

.main-nav a:not(.nav-cta) {
    position: relative;
    font-family: var(--font-display);
    font-weight: var(--weight-medium);
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding-block: 0.4rem;
    white-space: nowrap;
}

.main-nav a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1.5px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur-mid) var(--ease-out);
}

.main-nav a:not(.nav-cta):hover {
    color: var(--text-primary);
}

.main-nav a:not(.nav-cta):hover::after {
    transform: scaleX(1);
}

/* ---- Hamburger ---- */
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    position: relative;
    z-index: 2; /* keep the close (X) tap target above the overlay */
    transition: border-color var(--dur-fast) var(--ease-out),
                background-color var(--dur-fast) var(--ease-out);
}

.nav-toggle:hover {
    border-color: var(--border-accent);
    background: var(--accent-soft);
}

.nav-toggle svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
}

/* icon swap: bars → X when the overlay is open */
.nav-toggle .icon-close { display: none; }
.nav-toggle.is-active .icon-open { display: none; }
.nav-toggle.is-active .icon-close { display: block; }

/* ======================================================================
   FOOTER
   ====================================================================== */
.site-footer {
    position: relative;
    border-top: 1px solid var(--border);
    background: var(--bg-dark);
    padding-top: var(--space-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1.2fr 1fr;
    gap: var(--space-2xl);
    padding-bottom: var(--space-2xl);
}

.footer-brand img {
    height: calc(46px * 1.8);
    width: auto;
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: var(--text-secondary);
    max-width: 32ch;
    font-size: var(--text-sm);
}

.footer-col h4 {
    font-size: var(--text-label);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
    font-weight: var(--weight-semibold);
}

.footer-col a:not(.social-link),
.footer-col p {
    display: block;
    color: var(--text-secondary);
    font-size: var(--text-sm);
    margin-bottom: var(--space-2xs);
    width: fit-content;
}

.footer-col a {
    position: relative;
    transition: color var(--dur-fast) var(--ease-out);
}

.footer-col a:hover {
    color: var(--accent);
}

/* social row */
.social-links {
    display: flex;
    gap: var(--space-2xs);
}

.social-link {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition:
        transform var(--dur-fast) var(--ease-out),
        color var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out),
        background-color var(--dur-fast) var(--ease-out);
}

.social-link svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.social-link:hover {
    color: var(--white);
    border-color: var(--border-accent);
    background: var(--accent);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-block: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: var(--text-xs);
}

.footer-bottom-links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer-bottom-links a {
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

.footer-bottom-links a:hover { color: var(--accent); }

/* discreet "delivered by" credit */
.footer-credit { color: var(--text-muted); }

/* ======================================================================
   RESPONSIVE — header + footer
   ====================================================================== */
@media (max-width: 920px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
    .nav-toggle { display: inline-flex; }

    /* Full-screen mobile overlay menu */
    .main-nav {
        position: fixed;
        inset: 0;
        flex-direction: column;
        justify-content: center;
        gap: var(--space-lg);
        background: color-mix(in srgb, var(--bg-deep) 96%, transparent);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-12px);
        transition:
            opacity var(--dur-mid) var(--ease-out),
            transform var(--dur-mid) var(--ease-out),
            visibility var(--dur-mid);
    }

    .main-nav.is-open {
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .main-nav a:not(.nav-cta) {
        font-size: 1.6rem;
        color: var(--text-primary);
    }

    .main-nav a:not(.nav-cta)::after { display: none; }
}

@media (max-width: 560px) {
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}