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@media(max-width:820px){.foundation-budget-page .foundation-shell{width:min(100% - 28px,1180px)}.foundation-budget-page .main-nav,.foundation-budget-page .header-cta{display:none}.foundation-budget-page .main-nav.is-open{position:absolute;left:14px;right:14px;top:67px;display:flex;flex-direction:column;align-items:stretch;gap:0;padding:8px;border:1px solid #d7e4ed;border-radius:14px;background:#fff;box-shadow:0 20px 50px rgba(7,26,51,.14)}.foundation-budget-page .main-nav.is-open a{padding:12px}.foundation-budget-page .menu-toggle{display:block}.foundation-context-grid{grid-template-columns:1fr}.foundation-context-grid>div{border-left:0;border-right:0!important;border-bottom:1px solid rgba(255,255,255,.1)}.foundation-section-heading{display:block}.foundation-section-heading>p{margin-top:12px}.foundation-mode-switch{grid-template-columns:1fr}.foundation-fields.three{grid-template-columns:1fr}.scenario-cards{grid-template-columns:1fr}.phase-grid{grid-template-columns:1fr}.faq-grid{grid-template-columns:1fr}.foundation-footer-grid{grid-template-columns:1fr 1fr}.foundation-footer-brand{grid-column:1/-1}.foundation-footer-bottom{display:block}.foundation-footer-bottom span{display:block}.foundation-footer-bottom span:last-child{max-width:none;margin-top:8px;text-align:left}}
@media(max-width:620px){.foundation-hero{padding-bottom:46px}.foundation-hero-grid{padding-top:23px}.foundation-signature{align-items:flex-start;flex-direction:column;gap:10px}.foundation-signature img{width:158px;height:auto}.foundation-hero h1{font-size:2.55rem}.foundation-hero h1 em{font-size:.55em}.foundation-hero-subtitle{font-size:1rem}.foundation-lead{font-size:.9rem}.foundation-actions .foundation-btn{width:100%}.foundation-blueprint-head{display:block}.foundation-blueprint-head b{display:block;margin-top:5px}.foundation-cutaway{height:285px}.foundation-blueprint-result strong{font-size:1.4rem}.foundation-calc-section,.foundation-section{padding:54px 0}.foundation-input-card,.foundation-result-card{border-radius:18px}.foundation-input-card{padding:17px}.foundation-fields.two,.foundation-fields.four{grid-template-columns:1fr}.derived-strip{display:grid;grid-template-columns:1fr auto}.derived-strip strong{grid-column:2}.derived-strip small{grid-column:1/-1}.scope-checklist{grid-template-columns:1fr}.result-grid{grid-template-columns:1fr}.material-kpis{grid-template-columns:1fr 1fr}.scope-map{grid-template-columns:1fr}.benchmark-summary{grid-template-columns:1fr}.method-grid{grid-template-columns:1fr}.source-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr 1fr}.foundation-footer-grid{grid-template-columns:1fr}.foundation-footer-brand{grid-column:auto}.foundation-footer-bottom span:last-child{text-align:left}}
@media(max-width:410px){.foundation-budget-page .foundation-shell{width:min(100% - 20px,1180px)}.foundation-hero h1{font-size:2.22rem}.material-kpis,.related-grid{grid-template-columns:1fr}.f-label{font-size:.58rem}.foundation-blueprint-result{padding-inline:14px}}

/* Accessible skip link: hidden until keyboard focus. */
.foundation-budget-page .skip-link{position:fixed;left:14px;top:10px;z-index:10000;padding:10px 14px;border-radius:10px;background:#06182e;color:#fff;font-size:.76rem;font-weight:800;text-decoration:none;transform:translateY(-150%);transition:transform .15s}
.foundation-budget-page .skip-link:focus{transform:translateY(0);outline:3px solid #45d55a;outline-offset:2px}

/* RV V-next accessibility hardening — 2026-08-18 */
.foundation-mode,.footer-socials a{min-height:44px}.footer-socials a{min-width:44px;display:inline-flex;align-items:center;justify-content:center}.foundation-budget-page a:focus-visible,.foundation-budget-page button:focus-visible,.foundation-budget-page input:focus-visible,.foundation-budget-page select:focus-visible,.foundation-budget-page summary:focus-visible{outline:3px solid rgba(32,169,239,.38);outline-offset:3px}