/* AI catalog and TOP entry only; the four tools keep their existing styles. */
.ai-tools-section {
    padding: 28px;
    border: 1px solid #c8e1e7;
    border-radius: var(--radius);
    background: #f1f8fa;
}
.ai-section-label {
    margin: 0 0 8px;
    color: #23677b;
    font-size: .8rem;
    font-weight: 800;
    letter-spacing: .04em;
}
.ai-tools-section .top-section-title { margin-bottom: 12px; text-align: left; }
.ai-section-lead { margin: 0 0 24px; color: var(--muted); line-height: 1.85; }
.ai-tools-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.ai-tools-grid .top-tool-card { min-width: 0; }
.ai-tools-grid .top-tool-header { align-items: flex-start; }
.ai-tools-grid .top-tool-title { line-height: 1.6; overflow-wrap: anywhere; }
.ai-tools-grid .ai-title-unit { display: inline-block; }
.ai-tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 36px;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: #edf6f8;
    font-size: 1.15rem;
}
.ai-tools-grid .top-tool-desc { margin: 8px 0 20px; }
.ai-tools-grid .top-tool-cta { margin-top: auto; line-height: 1.6; }
.ai-subtitle-note { margin: 18px 0 0; color: #526471; font-size: .8rem; line-height: 1.8; }
.ai-section-more { margin: 20px 0 0; text-align: right; }
.ai-catalog-link {
    display: inline-block;
    padding: 10px 0;
    color: #15647a;
    font-weight: 800;
    text-underline-offset: 4px;
}
.top-category-card.cat-ai { border-top: 3px solid #3c8a9b; }
.ai-catalog .breadcrumb-wrapper { margin: 0 0 24px; }
.ai-catalog-hero {
    padding: 32px;
    margin-bottom: 32px;
    border: 1px solid #c8e1e7;
    border-radius: var(--radius);
    background: #f1f8fa;
}
.ai-catalog-hero h1 { margin: 0 0 12px; font-size: clamp(1.7rem, 3vw, 2.2rem); line-height: 1.5; }
.ai-catalog-tagline { color: var(--dark); font-size: 1.15rem; font-weight: 800; margin: 0 0 12px; }
.ai-catalog-hero .ai-section-lead { max-width: 760px; margin-bottom: 18px; }
.ai-local-note { margin: 0; color: #24586a; font-size: .85rem; line-height: 1.8; }
.ai-catalog-tools h2, .ai-preparation-guide h2 { margin: 0 0 20px; font-size: 1.3rem; color: var(--dark); }
.ai-catalog-tools { margin-bottom: 32px; }
.ai-tool-input { font-size: .75rem; font-weight: 700; color: #526471; margin: 0 0 12px; }
.ai-tool-benefit { font-size: 1rem; color: #23677b; font-weight: 800; margin: 6px 0 0; }
.ai-tools-grid .ai-catalog-card .top-tool-desc { margin-bottom: 12px; }
.ai-tool-note { margin: 0 0 20px; color: #526471; font-size: .8rem; line-height: 1.8; }
.ai-preparation-guide { border-top: 1px solid var(--border-soft); padding-top: 28px; }
.ai-preparation-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; padding-left: 22px; margin: 0; }
.ai-preparation-steps li { padding-left: 3px; color: #23677b; }
.ai-preparation-steps strong { display: block; color: var(--dark); font-size: .95rem; margin-bottom: 8px; }
.ai-preparation-steps span { display: block; color: var(--muted); font-size: .85rem; line-height: 1.85; }
.ai-catalog-home { margin: 32px 0 0; }
.ai-catalog-home a { color: #15647a; font-weight: 700; }
.ai-purpose-links { margin: 0 0 28px; }
.ai-purpose-links h2, .ai-before-use h2 { margin: 0 0 16px; font-size: 1.3rem; color: var(--dark); }
.ai-purpose-links ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 24px; }
.ai-purpose-links a { display: block; padding: 10px 0; color: #15647a; font-size: .9rem; font-weight: 700; line-height: 1.8; }
.ai-before-use { margin-top: 28px; padding: 24px; border: 1px solid var(--border-soft); border-radius: var(--radius); background: var(--surface); }
.ai-before-use ul { padding-left: 20px; margin: 0; color: #526471; font-size: .85rem; line-height: 1.9; }
.ai-before-use li + li { margin-top: 8px; }
.ai-tools-section a:focus-visible, .ai-catalog a:focus-visible, .top-category-card.cat-ai:focus-visible {
    outline: 3px solid #15647a;
    outline-offset: 4px;
}
@media (max-width: 600px) {
    .ai-tools-section, .ai-catalog-hero { padding: 20px 16px; }
    .ai-tools-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
    .ai-tools-grid .top-tool-card { padding: 20px; }
    .ai-tools-section .top-section-title { font-size: 1.25rem; line-height: 1.7; }
    .ai-section-more { text-align: left; }
    .ai-preparation-steps { grid-template-columns: minmax(0, 1fr); gap: 20px; }
    .ai-purpose-links ul { grid-template-columns: minmax(0, 1fr); }
    .ai-before-use { padding: 20px 16px; }
}
@media (prefers-reduced-motion: reduce) {
    .ai-tools-grid .top-tool-card, .ai-tools-grid .top-tool-cta { transition: none; }
    .ai-tools-grid .top-tool-card:hover { transform: none; }
}