/* Vocabulary · Infinite — word-pack carousel */
.packs-section {
    padding: 30px 0 65px;
}
.packs-heading-row {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 25px;
}
.packs-heading-row h2 {
    margin: 7px 0 12px;
}
.packs-intro {
    max-width: 640px;
    margin: 0;
    line-height: 1.65;
}
.packs-controls {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}
.packs-arrow {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid #a5c8c4;
    background: #fff;
    color: #214b49;
    font: inherit;
    font-size: 23px;
    cursor: pointer;
    transition: background 0.15s ease;
}
.packs-arrow:hover:not(:disabled) {
    background: #d8f2ee;
}
.packs-arrow:focus-visible,
.packs-carousel:focus-visible {
    outline: 3px solid #327b78;
    outline-offset: 3px;
}
.packs-arrow:disabled {
    opacity: 0.35;
    cursor: default;
}
.packs-carousel {
    display: flex;
    gap: 18px;
    padding: 8px 2px 18px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: #aaccc7 transparent;
}
.packs-card {
    flex: 0 0 clamp(190px, 24%, 258px);
    scroll-snap-align: start;
    min-width: 0;
    min-height: 280px;
    padding: 22px 16px 20px;
    border-radius: 22px;
    border: 1px solid #c6e3de;
    background: #edf8f5;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
    box-sizing: border-box;
}
.packs-card:nth-child(4n + 2) {
    background: #f9f2e8;
    border-color: #e8ddd0;
}
.packs-card:nth-child(4n + 3) {
    background: #f0ecfa;
    border-color: #ddd5ed;
}
.packs-card:nth-child(4n + 4) {
    background: #fcefee;
    border-color: #ecd9d5;
}
.packs-card img {
    display: block;
    width: min(100%, 178px);
    aspect-ratio: 1;
    object-fit: contain;
}
.packs-card h3 {
    font-size: 1rem;
    line-height: 1.35;
    margin: auto 0 0;
    color: #244744;
}
.packs-loading,
.packs-error {
    padding: 40px 0;
    color: #456b67;
}
.packs-footnote {
    margin: 13px 0 0;
    font-size: 0.9rem;
    color: #527774;
}
@media (max-width: 700px) {
    .packs-section {
        padding: 56px 0 65px;
    }
    .packs-heading-row {
        align-items: start;
    }
    .packs-controls {
        display: none;
    }
    .packs-card {
        flex-basis: min(76vw, 270px);
        min-height: 260px;
    }
    .packs-carousel {
        gap: 14px;
    }
}
@media (prefers-reduced-motion: reduce) {
    .packs-carousel {
        scroll-behavior: auto;
    }
}

/* Hide the native scrollbar; arrows and touch swiping remain active. */
.packs-carousel {
    scrollbar-width: none;
}
.packs-carousel::-webkit-scrollbar {
    display: none;
}