/* =========================================================
   CATEGORY PILLAR PAGE  (/tools/:category)
   hero + tool grid + "popular tools" list + FAQ + breadcrumb

   This used to be a <style> tag injected by category.js at runtime
   (see injectStyles() there) — meaning the edge-rendered SSR page
   (functions/tools/[category].js, same buildCategoryHtml() output)
   shipped completely unstyled until category.js ran client-side.
   Moved to a static file so first paint — including for crawlers
   that don't execute JS — is already styled. category.js no longer
   injects its own copy; this is the only version now.

   Reads colors/radius/shadow from the :root tokens in main.css.
   ========================================================= */

.cat-hero {
    max-width: 860px;
    margin: 44px auto 8px;
    padding: 0 20px;
    text-align: center;
}
.cat-hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--c-text);
    margin: 0 0 12px;
    line-height: 1.2;
}
.cat-hero-desc {
    color: var(--c-text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0;
}

.cat-grid-section {
    max-width: 1100px;
    margin: 32px auto 56px;
    padding: 0 20px;
}
.cat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.cat-tool-card {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 20px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    text-decoration: none;
    color: inherit;
    transition: box-shadow var(--tr-base), border-color var(--tr-base), transform var(--tr-base);
}
.cat-tool-card:hover {
    box-shadow: var(--sh-md);
    border-color: var(--icon-color, var(--c-primary));
    transform: translateY(-2px);
}

.cat-tool-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--r-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: color-mix(in srgb, var(--icon-color, var(--c-primary)) 12%, transparent);
    color: var(--icon-color, var(--c-primary));
    transition: background var(--tr-base);
}
.cat-tool-card:hover .cat-tool-icon {
    background: color-mix(in srgb, var(--icon-color, var(--c-primary)) 20%, transparent);
}

.cat-tool-info h3 {
    margin: 0 0 4px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--c-text);
}
.cat-tool-info p {
    margin: 0;
    font-size: .85rem;
    color: var(--c-text-secondary);
    line-height: 1.5;
}

.cat-empty {
    text-align: center;
    color: var(--c-text-tertiary);
    padding: 40px 0;
}

.cat-breadcrumb {
    max-width: 1100px;
    margin: 0 auto 40px;
    padding: 0 20px;
    font-size: .85rem;
    color: var(--c-text-tertiary);
}
.cat-breadcrumb a {
    color: var(--c-primary);
    text-decoration: none;
}
.cat-breadcrumb a:hover { text-decoration: underline; }

/* ── PILLAR CONTENT ── */
.cat-pillar {
    background: var(--c-surface-subtle);
    border-top: 1px solid var(--c-border);
    padding: 48px 20px 56px;
}
.cat-pillar-inner {
    max-width: 760px;
    margin: 0 auto;
}
.cat-pillar-inner p {
    color: var(--c-text-secondary);
    font-size: 15px;
    line-height: 1.75;
    margin: 0 0 16px;
}
.cat-pillar-inner h2 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--c-text);
    margin: 36px 0 16px;
}
.cat-pillar-inner h2:first-of-type { margin-top: 0; }
.cat-pillar-inner a {
    color: var(--c-primary);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid var(--c-primary-100);
    transition: color var(--tr-fast), border-color var(--tr-fast);
}
.cat-pillar-inner a:hover {
    color: var(--c-primary-dark);
    border-bottom-color: var(--c-primary);
}

.cat-popular-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 10px;
}
.cat-popular-list li {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    padding: 14px 18px;
    font-size: 14.5px;
    color: var(--c-text-secondary);
    line-height: 1.6;
}

.cat-faq-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.cat-faq-item {
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    overflow: hidden;
    background: var(--c-surface);
    transition: box-shadow var(--tr-base);
}
.cat-faq-item:hover { box-shadow: var(--sh-sm); }

.cat-faq-q {
    width: 100%;
    background: none;
    border: none;
    padding: 16px 18px;
    text-align: left;
    font-size: 14.5px;
    font-weight: 600;
    color: var(--c-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.cat-faq-arrow {
    font-size: 20px;
    color: var(--c-text-tertiary);
    transition: transform var(--tr-base);
    flex-shrink: 0;
    line-height: 1;
}
.cat-faq-q[aria-expanded="true"] .cat-faq-arrow {
    transform: rotate(90deg);
    color: var(--c-primary);
}
.cat-faq-q[aria-expanded="true"] { color: var(--c-primary); }

.cat-faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    padding: 0 18px;
}
.cat-faq-a.open { max-height: 300px; padding: 0 18px 16px; }
.cat-faq-a p {
    margin: 0;
    font-size: 14px;
    color: var(--c-text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--c-border);
    padding-top: 12px;
}

@media (max-width: 640px) {
    .cat-pillar { padding: 36px 16px 44px; }
    .cat-pillar-inner h2 { font-size: 1.15rem; }
}