.tcn-category-section {
    background: var(--tcn-color-background);
}

.tcn-category-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--tcn-space-md);
}

.tcn-category-card {
    position: relative;
    min-height: 18rem;
    border: var(--tcn-border-width) solid var(--tcn-color-border);
    border-radius: var(--tcn-radius-md);
    background: var(--tcn-color-surface);
    overflow: hidden;
    isolation: isolate;
    transition: border-color var(--tcn-transition-fast), box-shadow var(--tcn-transition-fast), transform var(--tcn-transition-fast);
}

.tcn-category-card::before {
    content: "";
    position: absolute;
    top: -4rem;
    right: -3rem;
    z-index: -1;
    width: 12rem;
    height: 12rem;
    border: var(--tcn-border-width) solid rgba(111, 143, 122, 0.2);
    border-radius: 50%;
    transition: background-color var(--tcn-transition-fast), border-color var(--tcn-transition-fast), transform var(--tcn-transition-fast);
}

.tcn-category-card--gel {
    background-image:
        linear-gradient(180deg, rgba(252, 252, 250, 0.08) 24%, rgba(252, 252, 250, 0.94) 82%),
        url("../images/collections/builder-gel.png");
}

.tcn-category-card--semipermanent {
    background-image:
        linear-gradient(180deg, rgba(252, 252, 250, 0.08) 24%, rgba(252, 252, 250, 0.94) 82%),
        url("../images/collections/gel-polish.png");
}

.tcn-category-card--nail-art {
    background-image:
        linear-gradient(180deg, rgba(252, 252, 250, 0.08) 24%, rgba(252, 252, 250, 0.94) 82%),
        url("../images/collections/nail-art.png");
}

.tcn-category-card--tools {
    background-image:
        linear-gradient(180deg, rgba(252, 252, 250, 0.08) 24%, rgba(252, 252, 250, 0.94) 82%),
        url("../images/collections/tools.png");
}

.tcn-category-card--gel,
.tcn-category-card--semipermanent,
.tcn-category-card--nail-art,
.tcn-category-card--tools {
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.tcn-category-card:hover,
.tcn-category-card:focus-within {
    border-color: var(--tcn-color-primary);
    box-shadow: var(--tcn-shadow-soft);
    transform: translateY(-3px);
}

.tcn-category-card:hover::before,
.tcn-category-card:focus-within::before {
    border-color: rgba(111, 143, 122, 0.4);
    background: rgba(111, 143, 122, 0.08);
    transform: scale(1.04);
}

.tcn-category-card__link {
    display: flex;
    min-height: inherit;
    padding: var(--tcn-space-xl);
    color: var(--tcn-color-text);
    text-decoration: none;
}

.tcn-category-card__content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-end;
    max-width: 24rem;
}

.tcn-category-card__number {
    margin-bottom: auto;
    color: var(--tcn-color-primary-hover);
    font-size: 0.75rem;
    font-weight: 750;
    letter-spacing: 0.08em;
}

.tcn-category-card__title {
    margin-bottom: var(--tcn-space-xs);
    font-size: 1.5rem;
}

.tcn-category-card p {
    margin-bottom: var(--tcn-space-lg);
    color: var(--tcn-color-muted);
    line-height: 1.55;
}

.tcn-category-card__cta {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0.65rem 1rem;
    border: var(--tcn-border-width) solid var(--tcn-color-graphite);
    border-radius: var(--tcn-radius-pill);
    color: var(--tcn-color-graphite);
    font-size: 0.875rem;
    font-weight: 700;
    transition: background-color var(--tcn-transition-fast), border-color var(--tcn-transition-fast), color var(--tcn-transition-fast);
}

.tcn-category-card__link:hover .tcn-category-card__cta,
.tcn-category-card__link:focus-visible .tcn-category-card__cta {
    border-color: var(--tcn-color-primary-hover);
    background: var(--tcn-color-primary-hover);
    color: var(--tcn-color-surface);
}

.tcn-category-card__link:focus-visible {
    outline: 3px solid var(--tcn-color-primary);
    outline-offset: -3px;
}

@media (min-width: 48rem) {
    .tcn-category-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--tcn-space-lg);
    }
}

@media (min-width: 64rem) {
    .tcn-category-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}