.mat-tool { padding-top: 28px; padding-bottom: 64px; container-type: inline-size; }
.site-header__inner { container-type: inline-size; }
.mat-tool [hidden] { display: none !important; }
.mat-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: .875rem; }
.mat-breadcrumb a { color: var(--forest); text-underline-offset: 3px; }
.mat-heading { margin: 24px 0 30px; }
.mat-tool h1 { font: 650 2.5rem/1.15 system-ui, sans-serif; letter-spacing: -.035em; margin: 0 0 10px; text-wrap: balance; }
.mat-heading p { color: var(--muted); margin: 0; font-size: 1.125rem; }
.mat-workspace { display: grid; grid-template-columns: minmax(290px, 360px) minmax(0, 1fr); gap: 40px; align-items: start; }
.mat-controls { min-width: 0; }
.mat-tool fieldset { border: 0; padding: 0; margin: 0 0 22px; min-width: 0; }
.mat-tool legend { font-size: 1.125rem; font-weight: 650; padding: 0; margin-bottom: 4px; }
.mat-help { font-size: .875rem; line-height: 1.5; color: var(--muted); margin: 0 0 12px; }
.mat-units { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 26px; font-size: .875rem; }
.mat-tool select { border: 1px solid #8b988f; border-radius: 6px; background: #fff; color: var(--ink); padding: 10px 9px; min-height: 44px; font: inherit; max-width: 100%; }
.mat-input-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.mat-input-pair label { font-size: .875rem; font-weight: 550; }
.mat-input { display: flex; align-items: center; margin-top: 6px; position: relative; }
.mat-input input { width: 100%; min-width: 0; padding: 11px 42px 11px 12px; border: 1px solid #8b988f; border-radius: 6px; background: #fff; color: var(--ink); font: 500 1.125rem/1.4 system-ui, sans-serif; font-variant-numeric: tabular-nums; appearance: textfield; }
.mat-input input::-webkit-inner-spin-button, .mat-input input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.mat-input > span { position: absolute; right: 12px; font-weight: 400; color: var(--muted); pointer-events: none; }
.mat-tool :is(input, select, summary, a):focus-visible { outline: 3px solid var(--water); outline-offset: 3px; }
.mat-input input[aria-invalid="true"] { border-color: #a02c26; background: #fff8f7; }
.mat-optical { display: flex; align-items: flex-start; gap: 12px; padding: 17px 0 20px; border-top: 1px solid var(--line); cursor: pointer; }
.mat-optical input { width: 20px; height: 20px; flex: 0 0 auto; margin: 3px 0 0; accent-color: var(--forest); }
.mat-optical strong { display: block; font-size: 1rem; font-weight: 650; }
.mat-optical span span { display: block; font-size: .875rem; color: var(--muted); margin-top: 4px; line-height: 1.5; }
.mat-results { padding: 18px 20px; background: #eaf0e9; border-radius: 8px; }
.mat-results__heading { display: flex; justify-content: space-between; align-items: center; }
.mat-results h2 { font-size: 1rem; margin: 0; }
.mat-results__heading > span { font-size: .875rem; color: #47594c; }
.mat-results dl { margin: 12px 0; }
.mat-results dl > div { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; padding: 6px 0; }
.mat-results dt { font-size: .9375rem; }
.mat-results dd { font-size: 1.5rem; font-weight: 600; line-height: 1.3; margin: 0; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.mat-results .mat-help { border-top: 1px solid #ccd9cc; padding-top: 12px; margin-bottom: 0; color: #47594c; }
.mat-error { background: #fff0ed; color: #892b21; padding: 12px; border-radius: 6px; font-size: .9375rem; }
.mat-preview-panel { background: #eef0ec; border-radius: 10px; min-width: 0; overflow: hidden; }
.mat-preview-toolbar { padding: 18px 22px 0; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.mat-tool .mat-view { display: flex; margin: 0; padding: 3px; background: #dfe5de; border-radius: 7px; }
.mat-view label { position: relative; cursor: pointer; }
.mat-view input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; }
.mat-view span { display: block; padding: 9px 14px; border-radius: 5px; font-size: .875rem; color: #495a4d; transition: background-color 160ms ease-out, color 160ms ease-out; }
.mat-view input:checked + span { background: var(--forest); color: #fff; }
.mat-view input:focus-visible + span { outline: 3px solid var(--water); outline-offset: 3px; }
.mat-colour { display: flex; align-items: center; gap: 8px; font-size: .875rem; }
.mat-colour select { background-color: transparent; padding: 8px; }
.mat-colour select:disabled { opacity: .5; }
.mat-preview { margin: 0; }
.mat-preview-stage { position: relative; }
.mat-preview svg { display: block; width: 100%; height: auto; }
.mat-dimensions path { fill: none; stroke: #59685e; stroke-width: 1; }
.mat-dimensions text { fill: #394a3e; font: 17px system-ui, sans-serif; font-variant-numeric: tabular-nums; }
#mat-preview-empty { position: absolute; inset: 0; margin: 0; display: grid; place-content: center; text-align: center; padding: 24px; color: var(--muted); }
.mat-preview figcaption { display: grid; gap: 5px; padding: 0 24px 24px; text-align: center; font-size: .875rem; color: #536057; }
.mat-preview figcaption strong { color: var(--ink); font-weight: 550; }
.mat-explanation { margin-top: 32px; border-top: 1px solid var(--line); padding-top: 20px; }
.mat-explanation summary { cursor: pointer; color: var(--forest); font-weight: 550; min-height: 44px; }
.mat-explanation div { max-width: 75ch; font-size: .9375rem; color: var(--muted); }
.mat-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.mat-tool-link { display: grid; grid-template-columns: minmax(230px, .85fr) 1.15fr; gap: 40px; align-items: center; padding: 32px 0; border-top: 1px solid var(--line); }
.mat-tool-link h2 { font-size: 1.75rem; margin: 0 0 12px; }
.mat-tool-link p { max-width: 55ch; color: var(--muted); margin-bottom: 24px; }
.mat-tool-link__image { background: #eef0ec; padding: 34px; }
.mat-tool-link__image img { display: block; width: 100%; height: auto; border: 24px solid white; }
.mat-tool-link .button { gap: 10px; }
@container (max-width: 60rem) {
    .primary-nav, .header-cta { display: none; }
    .mobile-nav { display: block; }
}
@container (max-width: 40rem) {
    .mat-workspace { grid-template-columns: minmax(0, 1fr); }
    .mat-preview-panel { position: static; }
}
@media (min-width: 1100px) { .mat-preview-panel { position: sticky; top: 110px; } }
@media (max-width: 850px) { .mat-workspace { gap: 24px; grid-template-columns: minmax(265px, .9fr) minmax(0, 1fr); } .mat-preview-toolbar { padding: 16px 14px 0; } .mat-dimensions text { font-size: 30px; } }
@media (max-width: 680px) {
    .mat-tool { padding-top: 20px; padding-bottom: 40px; }
    .mat-heading { margin: 22px 0 26px; }
    .mat-tool h1 { font-size: 2rem; }
    .mat-workspace { grid-template-columns: minmax(0, 1fr); gap: 26px; }
    .mat-preview svg { max-height: 330px; }
    .mat-dimensions text { font-size: 34px; }
    .mat-preview figcaption { padding: 0 16px 18px; }
    .mat-preview-toolbar { gap: 8px; }
    .mat-view span { padding: 9px 10px; }
    .mat-tool-link { grid-template-columns: minmax(0, 1fr); gap: 22px; }
}
@media (prefers-reduced-motion: reduce) { .mat-view span { transition: none; } }