@media (max-width: 1180px) {
    :root { --shell: min(100% - 48px, 1080px); --narrow: min(100% - 48px, 960px); }
    .header-shell { gap: 22px; }
    .primary-nav { gap: 17px; }
    .primary-nav a { font-size: .72rem; }
    .atlas-hero { grid-template-columns: 1fr .82fr; gap: 52px 38px; }
    .atlas-hero__photo img { height: 520px; }
    .home-request > .section-shell { grid-template-columns: .65fr 1.35fr; gap: 45px; }
    .footer-grid { gap: 40px; }
}

@media (max-width: 980px) {
    :root { --shell: min(100% - 40px, 900px); }
    .dev-ribbon { padding-inline: 20px; }
    .header-shell { min-height: 76px; grid-template-columns: auto auto 1fr; }
    .menu-toggle { display: inline-flex; grid-column: 3; justify-self: end; }
    .menu-toggle[aria-expanded="true"] .menu-open { display: none; }
    .menu-toggle[aria-expanded="true"] .menu-close { display: block; }
    .primary-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 12px 20px 24px; background: var(--mineral); border-bottom: 1px solid var(--line); box-shadow: 0 18px 30px rgba(38,56,63,.11); }
    .primary-nav.is-open { display: flex; }
    .primary-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .primary-nav a::after { bottom: 6px; }
    .header-cta { grid-column: 2; grid-row: 1; }
    .atlas-hero, .page-hero, .article-hero, .company-hero, .contact-hero { grid-template-columns: 1fr; }
    .atlas-hero { padding-top: 56px; }
    .atlas-hero__copy { padding: 0; }
    .atlas-hero__photo { display: grid; grid-template-columns: 1.35fr .65fr; }
    .atlas-hero__photo img { height: 420px; }
    .atlas-hero__photo figcaption { height: 100%; flex-direction: column; align-items: flex-start; justify-content: end; }
    .route-atlas__body { grid-template-columns: 1fr; }
    .house-cutaway { min-height: 260px; }
    .section-intro--row { align-items: start; }
    .field-spread, .backwater-feature { grid-template-columns: 1fr; }
    .field-spread figure, .backwater-feature figure { min-height: 530px; }
    .property-area { gap: 55px; }
    .home-request > .section-shell { grid-template-columns: 1fr; }
    .home-request__intro { max-width: 700px; }
    .page-hero { padding-top: 65px; }
    .page-hero__image { width: min(100%, 680px); justify-self: end; }
    .detail-hero { grid-template-columns: 24px 1fr; }
    .detail-hero__image { grid-column: 2; width: min(100%, 700px); }
    .diagnostic-grid, .faq-section { grid-template-columns: 1fr; gap: 35px; }
    .sticky-intro { position: static; }
    .decision-panel { grid-template-columns: 65px 1fr; gap: 35px; }
    .split-notes { gap: 35px; }
    .article-hero figure, .company-hero figure, .contact-hero figure { width: min(100%, 720px); justify-self: end; }
    .article-layout { grid-template-columns: 1fr; gap: 45px; }
    .article-nav { position: static; }
    .article-nav ol { columns: 2; }
    .contact-content { grid-template-columns: 1fr; }
    .contact-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 0 35px; }
    .contact-notes > .eyebrow, .contact-notes > .urgent-note { grid-column: 1 / -1; }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
    .footer-grid > div:last-child { grid-column: 2 / -1; display: grid; grid-template-columns: repeat(3, auto); }
    .footer-grid > div:last-child h2 { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
    :root { --shell: calc(100% - 28px); --narrow: calc(100% - 28px); }
    html { scroll-padding-top: 105px; }
    body { font-size: 16px; padding-bottom: 60px; }
    h1 { font-size: clamp(2.65rem, 13vw, 4.3rem); }
    h2 { font-size: clamp(1.9rem, 9vw, 3.1rem); }
    .dev-ribbon { min-height: 26px; justify-content: center; font-size: .55rem; text-align: center; }
    .dev-ribbon span:last-child { display: none; }
    .header-shell { min-height: 68px; gap: 10px; }
    .brand-mark { width: 39px; height: 39px; }
    .brand strong { font-size: .87rem; }
    .brand small { font-size: .5rem; }
    .header-cta { display: none; }
    .menu-toggle { grid-column: 3; }
    .breadcrumbs { margin-bottom: 28px; }
    .hero-actions { align-items: stretch; flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .text-link { justify-content: center; }
    .atlas-hero { gap: 38px; padding-top: 42px; }
    .atlas-hero__photo { display: block; }
    .atlas-hero__photo img { height: 380px; }
    .atlas-hero__photo figcaption { min-height: 68px; flex-direction: row; align-items: center; }
    .atlas-hero__photo::before { left: -10px; }
    .hero-proof { grid-template-columns: 1fr; }
    .hero-proof div { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-left: 0; border-bottom: 1px solid var(--line); }
    .hero-proof div:last-child { border-bottom: 0; }
    .route-atlas { padding: 28px 18px; margin-inline: -2px; }
    .route-atlas__head { flex-direction: column; align-items: start; gap: 18px; }
    .house-cutaway { min-height: 180px; padding: 5px; overflow-x: auto; }
    .house-cutaway svg { min-width: 620px; }
    .locator-result { grid-template-columns: 1fr; gap: 8px; }
    .section-intro--row { display: block; }
    .section-intro--row > p, .section-intro--row > a { display: inline-flex; }
    .service-ledger, .problem-board, .property-area, .home-guides { padding-top: 95px; }
    .home-service-list a { grid-template-columns: 40px 1fr 24px; gap: 15px; }
    .home-service-list a small { grid-column: 2 / -1; }
    .field-spread, .backwater-feature { margin-top: 100px; }
    .field-spread figure, .backwater-feature figure { min-height: 400px; }
    .field-spread__copy, .backwater-feature__copy { padding: 38px 24px; }
    .problem-tracks { grid-template-columns: 1fr; }
    .problem-tracks a:nth-child(odd) { border-right: 0; }
    .problem-tracks a:nth-child(even) { padding-left: 0; }
    .problem-tracks a { grid-template-columns: 36px 1fr 24px; padding-right: 0; }
    .problem-tracks em { grid-column: 2; }
    .property-area { grid-template-columns: 1fr; }
    .home-guide-grid { grid-template-columns: 1fr; }
    .home-guide-grid img { height: 240px; }
    .home-request { margin-top: 100px; padding: 80px 0; }
    .page-hero, .article-hero, .company-hero, .contact-hero { gap: 40px; padding: 48px 0 65px; }
    .page-hero__image { padding-left: 15px; }
    .page-hero__image img { height: 390px; }
    .detail-hero { grid-template-columns: 1fr; gap: 35px; padding: 45px 0 65px; }
    .detail-hero__rail { display: none; }
    .detail-hero__image { grid-column: 1; }
    .detail-hero__image img { height: 430px; }
    .diagnostic-grid { padding: 75px 0; }
    .process-section { padding: 80px 0; }
    .pipe-process { grid-template-columns: 1fr; gap: 0; }
    .pipe-process::before { top: 10px; bottom: 10px; left: 24px; width: 2px; height: auto; }
    .pipe-process article { min-height: 145px; padding: 0 0 28px 82px; }
    .pipe-process article > span { position: absolute; left: 0; top: 0; }
    .decision-panel { grid-template-columns: 1fr; padding: 35px 25px; margin-top: 75px; }
    .decision-marker { height: 36px; flex-direction: row; writing-mode: initial; }
    .decision-marker i { height: 2px; width: auto; }
    .split-notes { grid-template-columns: 1fr; padding-top: 80px; }
    .boundary-card { padding: 35px 25px; }
    .faq-section { padding-top: 85px; }
    .request-band { align-items: flex-start; flex-direction: column; margin-top: 80px; padding: 45px 20px; }
    .request-band .btn { width: 100%; }
    .ledger-row { grid-template-columns: 42px 1fr 24px; gap: 14px; }
    .ledger-copy { display: block; }
    .ledger-copy small { display: block; margin-top: 8px; }
    .ledger-route { display: none; }
    .guide-row { grid-template-columns: 38px 95px 1fr 20px; gap: 12px; }
    .guide-row img { width: 95px; height: 90px; }
    .guide-row__copy em { display: none; }
    .guide-row__copy strong { font-size: .85rem; }
    .article-hero figure img { height: 390px; }
    .article-nav ol { columns: 1; }
    .article-layout { padding-top: 65px; }
    .article-body > section { padding-left: 55px; }
    .article-body p { font-size: .96rem; }
    .official-source { align-items: flex-start; flex-direction: column; }
    .company-hero img, .contact-hero img { height: 410px; }
    .company-sections { padding-top: 40px; }
    .company-sections article { grid-template-columns: 50px 1fr; gap: 16px; padding: 35px 0; }
    .verification-grid { grid-template-columns: 1fr 1fr; }
    .contact-notes { display: block; }
    .request-form { padding: 30px 18px; }
    .form-heading { display: block; }
    .form-heading > p { margin-top: 16px; }
    .form-grid, .choice-grid { grid-template-columns: 1fr; }
    .form-submit { align-items: stretch; flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 42px 25px; padding: 60px 0; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: 1 / -1; grid-template-columns: 1fr 1fr; }
    .footer-bottom { flex-direction: column; }
    .mobile-actions { position: fixed; right: 0; bottom: 0; left: 0; z-index: 150; display: grid; grid-template-columns: 1fr 1fr; min-height: 60px; box-shadow: 0 -8px 25px rgba(25,42,50,.18); }
    .mobile-actions a, .mobile-actions button { display: grid; place-items: center; padding: 10px; border: 0; font-size: .72rem; font-weight: 850; }
    .mobile-actions a { color: #fff; background: var(--lake); }
    .mobile-actions button { color: var(--slate); background: var(--water); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}