/* Atelier — sticky architectural mast */

.at-mast {
    position: sticky;
    top: 0;
    z-index: 300;
    background: color-mix(in srgb, var(--at-cream) 92%, #fff);
    border-bottom: 1px solid var(--at-line);
    padding-top: var(--at-safe-top);
    transition: background var(--at-transition), border-color var(--at-transition);
}

.at-mast.is-scrolled {
    background: color-mix(in srgb, var(--at-ivory) 96%, var(--at-pistachio-soft));
    border-bottom-color: color-mix(in srgb, var(--at-pistachio) 36%, var(--at-beige));
}

.at-mast__rail {
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--at-pistachio) 18%,
        var(--at-pistachio-soft) 52%,
        transparent 100%
    );
    opacity: 0.85;
}

.at-mast__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--at-space-md);
    min-height: var(--at-header-h);
    width: min(1180px, calc(100% - 1.5rem));
    margin-inline: auto;
    padding-block: 0.35rem;
}

.at-mast__brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
    color: var(--at-ink);
}

.at-mast__glyph {
    position: relative;
    flex-shrink: 0;
    width: 28px;
    height: 28px;
}

.at-mast__glyph-sq {
    position: absolute;
    inset: 0;
    border: 1px solid var(--at-pistachio-deep);
    border-radius: var(--at-r-xs);
    background: color-mix(in srgb, var(--at-pistachio-soft) 55%, transparent);
}

.at-mast__glyph-bar {
    position: absolute;
    inset-inline-end: -4px;
    bottom: -3px;
    width: 12px;
    height: 3px;
    border-radius: var(--at-r-pill);
    background: var(--at-pistachio);
}

.at-mast__copy {
    display: grid;
    gap: 0.05rem;
    min-width: 0;
}

.at-mast__name {
    font-family: var(--at-font-display);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.at-mast__tag {
    font-size: 0.68rem;
    color: var(--at-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 14rem;
}

.at-mast__links {
    display: none;
    align-items: center;
    gap: 0.15rem 1.15rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.at-mast__links a,
.at-mast__logout button {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.25rem 0.1rem;
    border: 0;
    background: none;
    color: var(--at-charcoal);
    font-family: var(--at-font-ui);
    font-size: 0.86rem;
    font-weight: 500;
    cursor: pointer;
    transition: color var(--at-transition);
}

.at-mast__links a::after,
.at-mast__logout button::after {
    content: '';
    position: absolute;
    inset-inline: 0;
    bottom: 0.45rem;
    height: 1px;
    background: var(--at-pistachio);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--at-transition);
}

.at-mast__links a:hover,
.at-mast__links a:focus-visible,
.at-mast__logout button:hover,
.at-mast__logout button:focus-visible {
    color: var(--at-olive);
    outline: none;
}

.at-mast__links a:hover::after,
.at-mast__links a:focus-visible::after,
.at-mast__links a.is-active::after,
.at-mast__logout button:hover::after,
.at-mast__logout button:focus-visible::after {
    transform: scaleX(1);
}

.at-mast__links a.is-active {
    color: var(--at-olive);
}

.at-mast__tel {
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
    color: var(--at-muted) !important;
}

.at-mast__logout {
    margin: 0;
}

@media (min-width: 900px) {
    .at-mast__links {
        display: flex;
    }

    .at-mast__inner {
        width: min(1180px, calc(100% - 3.5rem));
    }

    .at-mast__name {
        font-size: 1.08rem;
    }
}

@media (max-width: 899px) {
    .at-mast__inner {
        min-height: 56px;
    }

    .at-mast__tag {
        display: none;
    }

    .at-mast__glyph {
        width: 24px;
        height: 24px;
    }
}