/* PAC — SUBSTANCES REGISTRY / MOBILE LAYER */
@media (max-width: 1050px) {
    .page-layout { grid-template-columns: 220px minmax(0, 1fr); }
    .category-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .main-content { padding-left: 24px; padding-right: 24px; }
}
@media (max-width: 700px) {
    .site-header { min-height: 66px; padding: 10px 15px; }
    .brand-logo { width: 35px; height: 35px; }
    .brand-name { font-size: 15px; }
    .header-user { gap: 9px; }
    .user-greeting { font-size: 11px; }
    .user-access { font-size: 9px; }
    .logout-link { font-size: 10px; padding: 6px 8px; }
    .page-layout { display: block; }
    .sidebar { position: static; height: auto; padding: 10px 12px; }
    .sidebar-heading, .sidebar-note { display: none; }
    .sidebar-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px; }
    .sidebar-nav a { font-size: 12px; padding: 9px 10px; }
    .main-content { padding: 18px 14px 30px; }
    .page-topline { font-size: 9px; flex-wrap: wrap; }
    .page-hero { padding: 29px 22px; margin: 16px 0; }
    .page-hero:after { font-size: 110px; top: -19px; }
    .hero-stats { gap: 14px; flex-wrap: wrap; }
    .hero-stats strong { font-size: 21px; }
    .hero-stats span { font-size: 9px; }
    .intro-panel { padding: 19px; }
    .intro-panel h2, .section-title { font-size: 23px; }
    .intro-panel p { font-size: 14px; }
    .category-toolbar { display: block; }
    .search-wrap { width: 100%; }
    .result-count { margin-top: 7px; }
    .category-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
    .category-tab { min-height: 48px; gap: 7px; padding: 7px; }
    .tab-code { min-width: 42px; font-size: 10px; }
    .tab-name { font-size: 11px; }
    .category-heading { padding: 19px 16px; }
    .category-heading h2 { font-size: 21px; }
    .category-heading p { font-size: 12px; }
    .category-mark { width: 45px; height: 45px; font-size: 15px; }
    .category-notice { margin: 13px 13px 5px; }
    .order-filter-row { display: block; padding: 13px 13px 0; }
    .order-filters { margin-top: 8px; }
    .order-section { margin: 14px 13px 20px; }
    .order-heading { display: block; }
    .order-heading p { margin-top: 5px; text-align: left; }
    .substance-card-body { grid-template-columns: 1fr; gap: 13px; padding: 13px; }
    .substance-media { width: min(100%, 360px); margin: 0 auto; }
    .image-open, .image-open img { min-height: 190px; height: 190px; }
    .substance-details { padding: 0 13px 13px; }
    .details-grid { grid-template-columns: 1fr; }
    .substance-meta { grid-template-columns: 1fr 1fr; }
    .empty-category { margin: 13px; padding: 22px 14px; }
    .page-footer { font-size: 8px; flex-wrap: wrap; }
    .page-nav-link { min-width: 0; flex: 1; padding: 9px; }
    .page-nav-link small { font-size: 8px; }
    .page-nav-link strong { font-size: 11px; }
}
@media (max-width: 420px) {
    .main-content { padding: 14px 9px 28px; }
    .category-tabs { grid-template-columns: 1fr 1fr; }
    .category-tab { align-items: flex-start; flex-direction: column; }
    .substance-meta { grid-template-columns: 1fr; }
    .substance-code { font-size: 15px; }
    .substance-card-top { padding: 10px; }
    .page-navigation { gap: 7px; }
    .page-nav-link { gap: 6px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}


/* PAC SUBSTANCES — MOBILE REFINEMENTS */
@media (max-width: 700px) {
    .order-heading { display: block; }
    .order-heading-copy > p { max-width: none; text-align: left; }
    .order-bulk-actions { margin-top: 10px; }
    .order-bulk-actions button { flex: 1 1 auto; }
    .substance-card-top { align-items: flex-start; }
    .substance-card-headline { min-width: 0; }
    .card-collapsed-summary { max-width: 95%; }
    .substance-access-badge { font-size: 8px; }
    .locked-card-body { padding: 17px 14px; }
}
@media (max-width: 420px) {
    .substance-card-top { gap: 8px; }
    .substance-identity { gap: 6px; }
    .substance-code { overflow-wrap: anywhere; }
    .card-toggle { width: 32px; height: 32px; }
    .order-bulk-actions { flex-direction: column; }
    .order-bulk-actions button { width: 100%; }
}