/* ── Anders & Voss page shell (Issue #72) ─────────────────────────────
   Site-wide chrome for demo.website-studio.dev - header/nav/footer, built
   from first principles for demo/base.html's own markup (`.av-*` classes
   throughout - no `.site-header`/`.nav-links`/`.site-footer`, so there is
   no selector or structural overlap with `templates/base.html`'s shared
   public shell). Colors/heading typography come from demo/tokens.css,
   loaded first; this file is pure layout.
*/

.av-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
}

.av-header-inner {
    position: relative;
    max-width: var(--container-canvas);
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.av-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-heading);
}

.av-brand:hover {
    color: var(--color-heading);
    text-decoration: none;
}

.av-brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-background);
    background: var(--color-heading);
}

.av-brand-name {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.av-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.av-nav a {
    color: var(--color-text-muted);
    font-size: var(--type-small-size);
    font-weight: var(--type-label-weight);
    padding: var(--space-1) 0;
    border-bottom: 2px solid transparent;
}

.av-nav a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.av-nav a.is-active {
    color: var(--color-heading);
    border-bottom-color: var(--color-primary);
}

.av-nav a.av-nav-cta {
    color: var(--color-background);
    background: var(--color-heading);
    padding: var(--space-2) var(--space-4);
    border-bottom: none;
}

.av-nav a.av-nav-cta:hover {
    background: var(--color-primary);
    color: var(--color-background);
}

.av-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
}

.av-nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-heading);
}

/* One shared horizontal canvas inset for every page's content, the same
   role shared/design-system/layouts/page.css's `.main-content` plays for
   the public shell - sections below only add their own vertical rhythm,
   never a second horizontal max-width/margin (avoids double-insetting a
   canvas already constrained here). */
.av-main {
    max-width: var(--container-canvas);
    margin: 0 auto;
    padding: var(--space-8) var(--space-6) var(--space-10);
    min-height: 60vh;
}

.alerts {
    padding-bottom: var(--space-4);
}

/* ── Footer ────────────────────────────────────────────────────
   A full-bleed ink field terminating the page, deliberately distinct
   from both the public shell's dark-grey footer and Website Studio's
   own - same "dark anchor" idea, this product's own ink color. */
.av-footer {
    background: var(--color-heading);
    color: var(--color-background);
}

.av-footer-inner {
    max-width: var(--container-canvas);
    margin: 0 auto;
    padding: var(--space-10) var(--space-6) var(--space-8);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
    justify-content: space-between;
}

.av-footer-brand {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    max-width: 24rem;
}

.av-footer-brand .av-brand-mark {
    background: var(--color-background);
    color: var(--color-heading);
}

.av-footer-brand p {
    font-family: var(--font-mono);
    font-weight: 700;
}

.av-footer-tagline {
    font-family: var(--font-sans);
    font-weight: 400;
    color: #B7AE9F;
    display: inline-block;
    margin-top: var(--space-1);
}

.av-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
}

.av-footer-group h2 {
    font-size: var(--type-caption-size);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #B7AE9F;
    margin-bottom: var(--space-3);
}

.av-footer-group ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.av-footer-group a {
    color: var(--color-background);
    font-size: var(--type-small-size);
}

.av-footer-group a:hover {
    color: var(--color-primary-light);
}

.av-footer-bottom {
    max-width: var(--container-canvas);
    margin: 0 auto;
    padding: var(--space-4) var(--space-6) var(--space-6);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: space-between;
    border-top: 1px solid #3A342C;
    font-size: var(--type-caption-size);
    color: #B7AE9F;
}

.av-demo-indicator a {
    color: #B7AE9F;
    text-decoration: underline;
}

.av-demo-indicator a:hover {
    color: var(--color-background);
}

@media (max-width: 720px) {
    .av-nav-toggle {
        display: flex;
    }

    .av-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        background: var(--color-background);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-2) var(--space-6) var(--space-4);
    }

    .av-nav.is-open {
        display: flex;
    }

    .av-nav a {
        width: 100%;
        padding: var(--space-3) 0;
    }

    .av-nav a.av-nav-cta {
        margin-top: var(--space-2);
        text-align: center;
    }
}