/* ==========================================================================
   MSSSUG — 集中路由页（Hub）
   ========================================================================== */

.msssug-hub {
    --hub-accent: var(--msssug-brand);
}

.msssug-hub__desc {
    margin: 0 0 20px;
    font-size: 14.5px;
    color: var(--msssug-ink-3);
}

.msssug-hub__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
}

.msssug-hub__card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 16px 16px 14px;
    background: var(--msssug-surface);
    border: 1px solid var(--msssug-line);
    border-radius: var(--msssug-r-md);
    box-shadow: var(--msssug-shadow-xs);
    color: var(--msssug-ink);
    overflow: hidden;
    transition: transform var(--msssug-dur-2) var(--msssug-ease),
                box-shadow var(--msssug-dur-2) var(--msssug-ease),
                border-color var(--msssug-dur-2) var(--msssug-ease);
}

.msssug-hub__card::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 3px;
    background: var(--hub-accent);
    opacity: 0;
    transition: opacity var(--msssug-dur-2) var(--msssug-ease);
}

.msssug-hub__card:hover,
.msssug-hub__card:focus-visible {
    color: var(--msssug-ink);
    transform: translateY(-3px);
    border-color: var(--msssug-brand-ring);
    box-shadow: var(--msssug-shadow-md);
}

.msssug-hub__card:hover::before,
.msssug-hub__card:focus-visible::before {
    opacity: 1;
}

.msssug-hub__card-title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--msssug-ink);
}

.msssug-hub__card-go {
    display: inline-flex;
    align-items: center;
    margin-top: 8px;
    color: var(--msssug-ink-4);
    transition: color var(--msssug-dur-2) var(--msssug-ease);
}

.msssug-hub__card-go svg {
    width: 16px;
    height: 16px;
    transition: transform var(--msssug-dur-2) var(--msssug-ease);
}

.msssug-hub__card:hover .msssug-hub__card-go {
    color: var(--hub-accent);
}

.msssug-hub__card:hover .msssug-hub__card-go svg {
    transform: translateX(3px);
}

.msssug-hub__empty {
    padding: 36px 20px;
    text-align: center;
    border: 1px dashed var(--msssug-line-strong);
    border-radius: var(--msssug-r-md);
    color: var(--msssug-ink-3);
    background: var(--msssug-surface);
}

@media (max-width: 560px) {
    .msssug-hub__grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .msssug-hub__card:hover {
        transform: none;
    }

    .msssug-hub__card:hover .msssug-hub__card-go svg {
        transform: none;
    }
}