/* Tools share the redesigned site's shell. All overrides stay inside .tu. */
#whitebg.tu-shell { width: 100%; max-width: none; padding: 0; border: 0; border-radius: 0; background: var(--tr-paper); }
#whitebg.tu-shell > main > .row { margin: 0; --bs-gutter-x: 0; }
#whitebg.tu-shell .ta-main { width: 100%; min-width: 0; padding: 0; }
.tu { color: var(--tr-text); background: var(--tr-paper); }
.tu *, .tu *::before, .tu *::after { box-sizing: border-box; }
.tu [hidden] { display: none !important; }
.tu-wrap { width: 100%; max-width: 1180px; margin-inline: auto; padding-inline: 20px; }
.tu :is(h1,h2,h3,h4) { background: none; border: 0; border-radius: 0; padding: 0; color: inherit; font-weight: 750; line-height: 1.2; letter-spacing: -.025em; }
.tu h2 { font-size: clamp(1.45rem,2.4vw,1.9rem); }
.tu h3 { font-size: 1.12rem; }
.tu p { line-height: 1.65; }
.tu a { color: #076e92; text-decoration: none; }
.tu a:hover { text-decoration: underline; }
.tu :is(a,button,input,select,summary):focus-visible { outline: 3px solid #0794be; outline-offset: 3px; }
.tu [id] { scroll-margin-top: 90px; }
.tu-hero { background: var(--tr-ink); color: #fff; padding: 24px 0 36px; }
.tu-trail { display: flex; flex-wrap: wrap; gap: 10px; font: .7rem/1.5 var(--tr-mono); color: #a6bac7; margin-bottom: 30px; }
.tu .tu-trail a { color: #c2d0d9; }
.tu-hero__grid { display: grid; grid-template-columns: minmax(0,1.65fr) minmax(0,1fr); gap: 64px; align-items: center; }
.tu-hero__grid.tu-hero__grid--solo { grid-template-columns: minmax(0,1fr); }
.tu .tu-eyebrow { font: 600 .68rem/1.5 var(--tr-mono); letter-spacing: .09em; text-transform: uppercase; color: #69808e; margin: 0 0 10px; }
.tu-hero .tu-eyebrow { color: var(--tr-cyan); }
.tu-hero h1 { font-size: clamp(2rem,3.5vw,3rem); margin: 0 0 18px; line-height: 1.08; letter-spacing: -.045em; text-wrap: balance; }
.tu-hero .tu-lede { font-size: 1rem; color: #bacbd6; max-width: 67ch; margin: 0 0 23px; }
.tu .tu-button { display: inline-flex; justify-content: center; align-items: center; gap: 20px; min-height: 44px; padding: 11px 17px; border-radius: 4px; font-size: .8rem; font-weight: 700; background: var(--tr-ink); color: #fff; text-decoration: none; border: 1px solid transparent; }
.tu .tu-button--cyan { background: var(--tr-cyan); color: #10252f; }
.tu .tu-button--light { color: #365669; background: #fff; border-color: #b8ccd8; }
.tu-hero__note { border-left: 1px solid #3c4c58; padding-left: 30px; }
.tu-hero__note > i { color: #33bbe3; font-size: 1.8rem; margin-bottom: 18px; }
.tu-hero__note h2 { font-size: 1rem; margin: 0 0 10px; }
.tu-hero__note p { margin: 0; font-size: .8rem; color: #a8bdca; }
.tu-group-nav { background: #fff; border-bottom: 1px solid #d3e0e8; }
.tu-group-nav .tu-wrap { display: flex; gap: 30px; overflow-x: auto; }
.tu-group-nav a { white-space: nowrap; padding: 20px 0; font-size: .8rem; font-weight: 650; }
.tu-group-nav a span { padding-left: 10px; }
.tu-index { padding-block: 40px 48px; }
.tu-group + .tu-group { margin-top: 40px; }
.tu-section-head { margin-bottom: 20px; }
.tu-section-head h2 { margin: 0; }
.tu-cards { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; }
.tu .tu-card { display: flex; flex-direction: column; padding: 26px; border: 1px solid #d2e0e8; border-radius: 6px; background: #fff; color: #1c3545; text-decoration: none; }
.tu .tu-card:hover { border-color: #42afcf; box-shadow: 0 4px 18px #1542580d; }
.tu-card > i { color: #087c9f; font-size: 1.7rem; margin-bottom: 22px; }
.tu-card h3 { font-size: 1.2rem; margin: 0 0 12px; }
.tu-card p { color: #647e8d; font-size: .85rem; margin-bottom: 22px; }
.tu-card > span { display: flex; justify-content: space-between; margin-top: auto; color: #087b9e; font-weight: 700; font-size: .75rem; }
.tu-workspace { padding-block: 32px 44px; }
.tu .tool-container, .tu .tool-content, .tu .tyre-calculator-container, .tu .pressure-calculator-container, .tu .tyre-selection-guide, .tu .tyre-health-tool { width: 100%; max-width: none; margin: 0; padding: 0; background: transparent; border: 0; box-shadow: none; }
.tu :is(.card,.tyre-section,.control-section,.tool-step,.size-input-card,.tsg-form,.tsg-card,.filter-section,.filter-form,.prediction-results,.insights-legend) { border-color: #d2e0e8; border-radius: 5px; box-shadow: none; }
.tu :is(.card-header,.card-footer) { background: #f0f6f9; border-color: #dce7ee; }
.tu :is(.btn-primary,.btn-success,.tsg-submit,.calculate-btn) { background: #153342; border-color: #153342; color: #fff; }
.tu :is(.btn-primary,.btn-success,.tsg-submit,.calculate-btn):hover { background: #076e91; border-color: #076e91; color: #fff; }
.tu :is(.btn-outline-primary,.btn-outline-secondary) { border-color: #99bccc; color: #176582; background: #fff; }
.tu :is(input:not([type=checkbox]):not([type=radio]):not([type=range]),select) { border-color: #b6cbd7; border-radius: 4px; }
.tu :is(.btn,button:not(.size-swap-btn)) { min-height: 40px; }
.tu table { border-color: #dce6ed; }
.tu table thead th { background: #edf4f8; color: #435e6e; }
.tu .table-responsive, .tu .comparison-table-wrapper { overscroll-behavior-x: contain; scrollbar-width: thin; }
.tu :is(.alert-info,.info-message,.tsg-alert--info) { background: #edf8fc; border-color: #bfdfed; color: #345c71; }
.tu .disclaimer-warning { background: #fff8ea; border: 1px solid #edd5a2; border-left: 3px solid #c69230; border-radius: 4px; }
.tu .disclaimer-warning p { font-size: .8rem; }
.tu .tu-notice, .tu .tu-input-error { border: 1px solid #dba9a1; border-left: 3px solid #a84436; padding: 15px 18px; background: #fff5f2; color: #873e32; border-radius: 4px; }
.tu [aria-invalid=true] { border-color: #b64b3c !important; }
.tu .tool-faq-item { border: 1px solid #d5e2e9; border-radius: 4px; margin-bottom: 9px; background: #fff; }
.tu .tool-faq-item summary { padding: 15px 18px; cursor: pointer; font-weight: 650; }
.tu .tool-faq-answer { padding: 0 18px 18px; color: #536e7e; }
.tu-next { border-top: 1px solid #d6e3eb; background: #edf4f8; padding: 32px 0; }
.tu-next .tu-wrap { display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.tu-next h2 { font-size: 1.5rem; margin: 0 0 12px; }
.tu-next p:not(.tu-eyebrow) { max-width: 75ch; font-size: .85rem; color: #647c8a; margin: 0; }
.tu-next__links { display: flex; flex-wrap: wrap; gap: 10px; flex-shrink: 0; }
.tu .prediction-interface { grid-template-columns: minmax(280px,.85fr) minmax(0,1.4fr); gap: 24px; }
.tu .selector-list { border-color: #d2e0e8; max-height: 360px; scrollbar-width: thin; }
.tu button.selector-item { display: block; width: 100%; text-align: left; font: inherit; border: 0; border-left: 3px solid transparent; border-bottom: 1px solid #dce7ee; border-radius: 0; padding: 12px; background: #fff; color: inherit; }
.tu button.selector-item.selected { background: #e8f8fd; border-left-color: #049fc6; }
.tu .selector-item .item-title { display: block; }
.tu .collapsible-header { display: flex; align-items: center; justify-content: space-between; width: 100%; background: transparent; border: 0; color: inherit; text-align: left; font: inherit; }
.tu .how-it-works { background: #f1f7fa; border-color: #d2e0e8; }
.tu .tyre-health-tool-form { max-width: 840px; margin-inline: auto; }
.tu button.tyre-search-item { width: 100%; text-align: left; background: #fff; border: 0; border-bottom: 1px solid #dce7ee; color: inherit; font: inherit; }
.tu button.tyre-search-item:hover, .tu button.tyre-search-item:focus-visible { background: #e8f8fd; }
.tu .tsg-form { background: #fff; padding: 25px; }
.tu .tsg-hero { display: none; }
.tu .tsg-submit--bottom { margin-top: 22px; }
.tu .tsg-form__primary { align-items: end; }
.tu .tsg-choice input:checked + span, .tu .tsg-segmented input:checked + span { background: #e8f8fd; border-color: #0694bb; color: #056280; }
.tu .article-header-card { border: 1px solid #d2e0e8; box-shadow: none; background: #fff; }
.tu .article-header-card__title { font-size: 1.45rem; }
.tu .tu-result-search { display: flex; flex-direction: column; gap: 7px; margin-bottom: 16px; font-size: .8rem; }
.tu .tu-result-search input { max-width: 420px; min-height: 44px; padding: 9px 12px; border: 1px solid #b6cbd7; }
.tu :is(.results-section,.result-card,.cta-chart-card,.cta-impact__simulator,.tool-intro,.insights-table,.size-input-card,.tsg-card) { box-shadow: none; border: 1px solid #d2e0e8; border-radius: 5px; }
.tu :is(.tool-intro,.methodology-section,.tool-howto,.cta-impact__simulator) { background: #f3f8fa; }
.tu .result-card-header { background: #163443; color: #fff; }
.tu .result-conservative .result-card-header { background: #1b5365; }
.tu .result-card-header h3 { color: #fff; }
.tu .result-card-header .badge { background: #315566 !important; color: #d2eef8; font-weight: 500; }
.tu .result-status.text-warning { color: #886219 !important; }
.tu .results-section { margin-top: 26px; }
.tu .size-input-panel { display: grid; grid-template-columns: minmax(0,1fr) 46px minmax(0,1fr); gap: 24px; align-items: center; }
.tu .size-input-card { width: 100%; padding: 24px; }
.tu .size-input-fields { justify-content: center; }
.tu .size-input-title { margin-bottom: 16px; }
.tu .size-swap-btn { color: #176582; }
.tu .size-swap-btn i::before { content: "\f0ec"; }
.tu .tu-visual-fallback { padding: 32px; color: #516d7e; }
.tu .tyre-visualization-container:has(.tu-visual-fallback) { height: auto; min-height: 100px; }
.tu :is(.filter-btn.active,.bestfor-btn.active) { background: #173b4b; border-color: #173b4b; color: #fff; }
.tu .btn-expand { background: #e8f6fc; border: 1px solid #accfdd; color: #126882; }
.tu .summary-stat { padding: 20px; background: #f0f7fa; border-color: #d2e0e8; border-radius: 5px; }
.tu .summary-stat .stat-value { color: #193d4f; }
.tu .tsg-form { margin-top: 0; }
.tu .cta-section { margin-top: 30px; }
@media (prefers-reduced-motion: reduce) { .tu *, .tu *::before, .tu *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }
@media (max-width: 900px) { .tu-hero__grid { gap: 28px; grid-template-columns: 1.4fr 1fr; } .tu-cards { grid-template-columns: repeat(2,minmax(0,1fr)); } .tu-next .tu-wrap { display: block; } .tu-next__links { margin-top: 20px; } }
@media (max-width: 700px) {
    .tu-wrap { padding-inline: 18px; } .tu-hero { padding-top: 22px; } .tu-trail { margin-bottom: 24px; font-size: .62rem; }
    .tu-hero__grid { grid-template-columns: 1fr; gap: 22px; } .tu-hero__note { padding: 18px 0 0; border-left: 0; border-top: 1px solid #3c4c58; }
    .tu-hero__note > i { display: none; } .tu-hero .tu-lede { font-size: .94rem; } .tu-cards { grid-template-columns: 1fr; }
    .tu-group-nav .tu-wrap { gap: 24px; } .tu-group-nav a { font-size: .74rem; } .tu-workspace { padding-top: 24px; }
    .tu .prediction-interface { grid-template-columns: 1fr; } .tu :is(.tsg-form,.control-section,.tool-step) { padding: 17px; }
    .tu :is(input:not([type=checkbox]):not([type=radio]):not([type=range]),select) { font-size: 16px; }
    .tu .tool-content > .row { margin-inline: 0; } .tu .selector-list { max-height: 280px; }
    .tu .size-input-panel { grid-template-columns: 1fr; gap: 12px; } .tu .size-swap-btn { justify-self: center; }
    .tu .size-input-card { padding: 20px 16px; } .tu .results-section { padding: 16px; }
}
@media print { .tu-hero .tu-button, .tu-next, .tu-group-nav { display: none; } .tu-hero { background: #fff; color: #111; } .tu-hero p { color: #333; } }

/* Tyre-size decision workspace: useful without a chart library or WebGL. */
.tu .sz-comparison-hint { border-left: 3px solid #0aadd5; padding: 12px 16px; background: #edf8fc; color: #315d70; }
.tu .sz-paste { margin-bottom: 20px; }
.tu .sz-paste label { display: block; font-size: .75rem; margin-bottom: 7px; color: #476779; }
.tu .sz-paste > div { display: flex; gap: 6px; }
.tu .sz-paste input { width: 100%; min-width: 0; border: 1px solid #b6cbd7; padding: 9px 12px; }
.tu .sz-paste button { flex-shrink: 0; border: 1px solid #9ebdcd; background: #eef7fb; color: #245467; padding: 8px 12px; border-radius: 4px; font-size: .78rem; }
.tu .sz-paste-note { color: #627b8a; font-size: .8rem; }
.tu .sz-decision { background: #fff; border: 1px solid #bdd4df; border-top: 4px solid #0aa7cf; border-radius: 5px; padding: 26px; margin: 28px 0; }
.tu .sz-decision header { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.tu .sz-decision h2 { font-size: clamp(1.35rem,2.5vw,2rem); margin: 0 0 14px; }
.tu .sz-note { color: #526f7f; font-size: .83rem; line-height: 1.65; }
.tu .sz-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin: 22px 0; }
.tu .sz-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0 0 18px; }
.tu .sz-facts > div { padding: 14px; background: #edf5f9; border-radius: 4px; }
.tu .sz-facts dt { font-size: .7rem; font-weight: 500; color: #536d7c; }
.tu .sz-facts dd { font: 700 1.5rem/1.5 var(--tr-mono); color: #163b4d; margin: 5px 0 0; }
.tu #sz-rim { font-size: .84rem; color: #4c6a7b; }
.tu .sz-speed { padding: 18px; border: 1px solid #d5e3eb; border-radius: 4px; }
.tu .sz-speed label { font-size: .78rem; display: block; margin-bottom: 8px; }
.tu .sz-speed-input { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; }
.tu .sz-speed input { min-width: 0; width: 100px; border: 1px solid #b6cbd7; padding: 8px 10px; }
.tu .sz-speed button { background: #fff; border: 1px solid #bdd2dd; padding: 8px 10px; }
.tu .sz-speed button[aria-pressed=true] { background: #163b4d; color: #fff; }
.tu .sz-speed output { display: block; font: 700 1.7rem/1.5 var(--tr-mono); color: #116789; }
.tu .sz-speed p { margin: 12px 0 0; font-size: .75rem; color: #5c7584; }
.tu .sz-diagram { align-self: start; margin: 0; background: #f2f6f8; border-radius: 5px; padding: 18px; }
.tu .sz-diagram svg { width: 100%; height: auto; }
.tu .sz-tyre { fill: #233b49; stroke: #12779d; stroke-width: 3px; }
.tu .sz-tyre--2 { fill: #61482e; stroke: #bc8848; }
.tu .sz-rim { fill: #e6edf1; stroke: #adc0ca; stroke-width: 2px; }
.tu .sz-diagram text { fill: #234357; font: 600 16px sans-serif; }
.tu .sz-diagram figcaption { color: #5d7584; font-size: .75rem; padding-top: 15px; }
.tu .cta-evidence { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--tr-line); }
.tu .cta-evidence__author { display: flex; align-items: center; gap: 12px; }
.tu .cta-evidence__author img { border-radius: 50%; }
.tu .cta-evidence__author span { display: block; color: var(--tr-muted); font-size: .73rem; margin-bottom: 4px; }
.tu .cta-evidence__author a { font-size: .85rem; font-weight: 700; }
.tu .cta-evidence__facts { display: flex; flex-wrap: wrap; gap: 18px 30px; margin: 0; }
.tu .cta-evidence__facts dt { font-size: .7rem; font-weight: 500; color: var(--tr-muted); }
.tu .cta-evidence__facts dd { font: 600 1.15rem/1.5 var(--tr-mono); margin: 4px 0 0; }
.tu .cta-season-filter { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0; }
.tu .cta-season-filter a { display: inline-flex; align-items: center; min-height: 44px; padding: 10px 18px; border: 1px solid #b9cdd7; border-radius: 25px; font-size: .82rem; font-weight: 650; text-decoration: none; }
.tu .cta-season-filter a[aria-current=page] { background: var(--tr-ink); color: #fff; border-color: var(--tr-ink); }
.tu .cta-season-filter a:hover { border-color: #087fa8; }
.tu .cta-outline { background: #f0f6f9; border: 1px solid #d2e1e9; border-radius: 5px; margin-bottom: 28px; }
.tu .cta-outline summary { padding: 16px 20px; cursor: pointer; font-size: .85rem; font-weight: 650; }
.tu .cta-outline ol { columns: 2 280px; padding: 0 24px 16px 42px; margin: 0; font-size: .85rem; }
.tu .cta-outline li { break-inside: avoid; padding: 7px 0; }
.tu .sz-links { display: flex; flex-wrap: wrap; gap: 10px; }
.tu #sz-share-link { width: 100%; padding: 12px; }
.tu #sz-dirty { background: #fff3d9; color: #765213; padding: 12px; }
.tu .sz-method { margin: 32px 0; padding: 24px; background: #f0f6f9; border: 1px solid #d3e3eb; border-radius: 5px; }
.tu .sz-method p { color: #4e6a7c; }
.tu .sz-method dl { font-family: var(--tr-mono); font-size: .85rem; padding: 16px; background: #fff; }
.tu .sz-method h3 { margin-top: 24px; }
.tu--tyre-size-calculator #keyStats, .tu--tyre-size-calculator #comparedDimensions { display: none !important; }
.tu--tyre-size-calculator #visual-comparison { margin: 0 0 30px; }
.tu--tyre-size-calculator .visualization-controls { box-shadow: none; border: 1px solid #d3e3eb; border-radius: 4px; }
@media(max-width:700px) { .tu .sz-grid { grid-template-columns: 1fr; gap: 18px; } .tu .sz-decision { padding: 18px; } .tu .sz-decision header { display: block; } .tu .sz-decision header button { margin-bottom: 16px; } .tu .sz-facts dd { font-size: 1.2rem; } .tu .sz-method { padding: 18px; } }