/* BikeSize: layout condiviso per calcolatori e guide. */
:root {
  --bg: #f5f7f6;
  --surface: #fff;
  --surface2: #edf4ef;
  --border: #e0e7e2;
  --border2: #cdd8d0;
  --accent: #246344;
  --accent-strong: #194a32;
  --accent-text: #fff;
  --accent-d: rgba(36,99,68,.10);
  --accent-d2: rgba(36,99,68,.05);
  --text: #18251e;
  --text2: #3d4c43;
  --text3: #607065;
  --text-muted: #536258;
  --body-bg: var(--bg);
  --shadow: none;
  --ui: "Segoe UI", system-ui, sans-serif;
}
:root[data-theme=dark] {
  --bg: #142019;
  --surface: #1c2a21;
  --surface2: #25392b;
  --border: #35483a;
  --border2: #4a6251;
  --accent: #a5d7b2;
  --accent-strong: #b9e8c4;
  --accent-text: #142019;
  --text: #edf5ef;
  --text2: #d1ddd4;
  --text3: #a6b8ac;
  --text-muted: #a6b8ac;
  --body-bg: var(--bg);
  --shadow: none;
}
body.site { background: var(--bg); font-size: 16px; line-height: 1.55; }
.site a { color: var(--accent); }
.site .site-shell { width: min(1080px, calc(100% - 48px)); margin-inline: auto; }
.site .site-header {
  position: static; padding: 0; background: var(--surface);
  border-bottom: 1px solid var(--border); box-shadow: none;
}
.site-header > .site-shell { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.site .site-brand { color: var(--text); font-size: 25px; font-weight: 750; letter-spacing: -1.3px; text-decoration: none; }
.site-brand span { color: var(--accent); }
.site-menu { display: flex; gap: 26px; margin-right: auto; }
.site .site-menu a { color: var(--text2); font-size: 14px; text-decoration: none; font-weight: 600; }
.site-menu a:hover { color: var(--accent); text-decoration: underline; }
.site-controls { display: flex; gap: 8px; align-items: center; }
.site .site-controls select, .site .theme-toggle {
  width: auto; min-height: 44px; padding: 8px 12px; border: 1px solid var(--border);
  border-radius: 6px; font: 600 13px var(--ui); color: var(--text2); background: var(--surface);
  letter-spacing: 0; text-transform: none; box-shadow: none;
}
.site-notice { text-align: center; font-size: 11px; color: var(--text3); padding: 6px 12px; border-top: 1px solid var(--border); }
.site .site-controls select { font-size: 16px; width: 4rem; min-width: 4rem; max-width: 4rem; }
.site main { padding: 28px 0 48px; }
.site-hero { text-align: center; margin-bottom: 24px; }
.site-hero .site-kicker { font-size: 12px; color: var(--accent); font-weight: 700; margin-bottom: 7px; }
.site .site-hero h1 { max-width: 740px; margin: 0 auto 10px; font-size: clamp(30px, 3.8vw, 43px); line-height: 1.12; letter-spacing: -1.4px; text-wrap: balance; }
.site-hero > p:last-child { max-width: 580px; margin: auto; color: var(--text3); font-size: 15px; }
.site-workspace { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; }
.site-primary { min-width: 0; }
.site-tool-nav { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 14px; }
.site .site-tool-nav .site-tool-tab { flex: 1; min-height: 44px; color: var(--text3); text-align: center; padding: 12px 6px; font: 650 14px/1.35 var(--ui); border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: transparent; cursor: pointer; }
.site .site-tool-nav .site-tool-tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.site-tool-nav .site-tool-tab:hover { background: var(--surface2); }
.site .calc-form {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px;
  margin: 0; padding: 24px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); box-shadow: none;
}
.site-form-heading { grid-area: 1 / 1; font-size: 19px; font-weight: 700; align-self: center; }
.site .calc-form .unit-group { grid-area: 1 / 2; margin: 0; padding: 0; width: auto; display: flex; justify-content: flex-end; }
.site .unit-group > label { display: none; }
.site .unit-toggle { display: flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; box-shadow: none; }
.site .unit-toggle-btn { min-width: 44px; min-height: 44px; padding: 6px 10px; font: 600 13px var(--ui); border: 0; border-radius: 0; background: var(--surface); color: var(--text3); }
.site .unit-toggle-btn.active { color: var(--accent); background: var(--surface2); box-shadow: none; }
.site .tipo-group { grid-area: 2 / 1 / auto / -1; margin: 0; }
.site .field-lbl, .site .field label { font: 600 14px var(--ui); color: var(--text2); letter-spacing: 0; text-transform: none; margin-bottom: 8px; }
.site .radio-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 7px; }
.site .radio-opt label { min-height: 44px; padding: 10px 5px; font: 600 13px var(--ui); letter-spacing: 0; border-radius: 6px; background: var(--surface); box-shadow: none; }
.site .radio-opt .bike-icon { display: none; }
.site .radio-opt input:checked + label { background: var(--surface2); color: var(--accent); border-color: var(--accent); box-shadow: none; }
.site .calc-form .field-pair { grid-area: 3 / 1 / auto / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 0; }
.site .field { min-width: 0; }
.site .input-wrap { margin-top: 0; }
.site .field input { font: 600 19px var(--ui); min-height: 52px; padding: 12px 42px 12px 14px; border-radius: 6px; box-shadow: none; }
.site .input-unit { font: 500 13px var(--ui); right: 13px; color: var(--text3); }
.site .field-hint { display: block; font: 12px/1.5 var(--ui); margin-top: 7px; color: var(--text3); }
.site .field-hint a { text-underline-offset: 3px; }
.site .field-error { font-size: 12px; }
.site .ride-goal-group { grid-area: 4 / 1 / auto / -1; margin: 0; padding: 0; border: 0; background: transparent; }
.site .ride-goal-group > summary { font-size: 13px; color: var(--text3); min-height: 44px; padding: 10px 0; }
.site .ride-goal-tip { font-size: 12px; }
.site .btn-calc { grid-area: 5 / 1 / auto / -1; width: 100%; min-height: 50px; margin: 0; border-radius: 6px; font: 650 16px var(--ui); letter-spacing: 0; text-transform: none; box-shadow: none; }
.site .btn-calc:hover { background: var(--accent-strong); }
.site .site-method { color: var(--text3); font-size: 12px; margin: 12px 3px 0; }
.site #results:not(.show) { display: none; }
.site #results.show { display: block; margin: 24px 0 0; padding: 20px; background: var(--surface); border: 1px solid var(--border); border-top: 3px solid var(--accent); border-radius: 9px; opacity: 1; box-shadow: none; }
.site .res-topbar { margin-bottom: 12px; }
.site .res-section-lbl { font: 650 15px var(--ui); text-transform: none; letter-spacing: 0; color: var(--text); }
.site .res-tipo-pill { font: 600 11px var(--ui); letter-spacing: 0; border-radius: 4px; }
.site .res-card { border-radius: 6px; overflow: hidden; box-shadow: none; }
.site .res-main { grid-template-columns: 1fr 1.6fr; }
.site .res-cell { padding: 14px; }
.site .res-cell-lbl { font: 500 12px var(--ui); text-transform: none; letter-spacing: 0; }
.site .res-cell-val { font: 700 54px/1.15 var(--ui); letter-spacing: -2px; }
.site .res-cell-val.telaio { font-size: 32px; letter-spacing: -1px; }
.site .res-details { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.site .res-det { display: block; grid-column: auto; padding: 10px; min-width: 0; text-align: left; }
.site .res-det:last-child { grid-column: auto; }
.site .res-det-lbl { font: 500 11px var(--ui); letter-spacing: 0; text-transform: none; }
.site .res-det-val { font: 650 14px var(--ui); white-space: nowrap; }
.site .res-perche, .site .fit-advice, .site .fit-checklist, .site .fit-extra, .site .fit-technical { font-size: 13px; }
.site .fit-confidence-label, .site .fit-extra-label { font-size: 10px; letter-spacing: .04em; }
.site .fit-confidence-wrap, .site .fit-extra { background: var(--surface2); border: 0; border-radius: 5px; }
.site .copy-result, .site .print-btn { min-height: 40px; font: 600 13px var(--ui); border-radius: 5px; }
.site-sidebar { display: flex; flex-direction: column; gap: 28px; padding-top: 59px; }
.site-measure { padding: 22px; border-radius: 8px; background: var(--surface2); }
.site-measure h2 { font-size: 17px; line-height: 1.3; margin-bottom: 12px; letter-spacing: -.2px; }
.site-measure ol { list-style: none; display: grid; gap: 11px; counter-reset: steps; }
.site-measure li { display: grid; grid-template-columns: 20px 1fr; gap: 9px; font-size: 13px; color: var(--text2); }
.site-measure li::before { counter-increment: steps; content: counter(steps); font-size: 12px; font-weight: 700; color: var(--accent); }
.site-measure > a { display: inline-block; font-size: 13px; font-weight: 600; margin-top: 16px; text-underline-offset: 3px; }
.site-reading { max-width: 100%; padding-top: 6px; margin-top: 32px; }
.site-section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 18px; border-bottom: 1px solid var(--border); padding-bottom: 14px; }
.site .site-section-heading h2 { font-size: 24px; letter-spacing: -.6px; line-height: 1.2; }
.site-section-heading > p { font-size: 13px; color: var(--text3); }
.site-guide-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 40px; }
.site .site-guide-link { position: relative; padding: 20px 30px 20px 0; border-bottom: 1px solid var(--border); color: var(--text); text-decoration: none; }
.site-guide-link h3 { font-size: 17px; letter-spacing: -.2px; line-height: 1.3; margin-bottom: 6px; }
.site-guide-link p { font-size: 13px; color: var(--text3); max-width: 45ch; }
.site-guide-link span { position: absolute; right: 2px; top: 20px; color: var(--accent); }
.site-guide-link:hover h3 { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.site .sz-table caption:not(.sr-only) { caption-side: top; text-align: left; color: var(--text3); font: 400 13px/1.6 var(--ui); padding: 0 0 12px; }
@media (max-width: 899px) {
  .site .sz-table caption:not(.sr-only) { display: block; width: 100%; }
  .site .sz-table tbody th { display: block; width: 100%; white-space: normal; overflow-wrap: anywhere; }
}
.site-table { margin-top: 28px; padding: 16px 20px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
.site-table > summary { font-size: 15px; font-weight: 650; cursor: pointer; }
.site-table .table-section { margin-top: 22px; }
.site-table .section-h2 { display: none; }
.site .site-footer { background: var(--surface); border-top: 1px solid var(--border); padding: 22px 0; }
.site-footer > .site-shell { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.site-footer p { font-size: 12px; color: var(--text3); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site .site-footer a { color: var(--text3); font-size: 12px; text-decoration: none; }
.site-next h2 { font-size: 16px; margin-bottom: 10px; }
.site-next a { display: block; padding-block: 8px; font-size: 13px; text-underline-offset: 3px; }
.site-choice { margin-top: 18px; }
.site-choice > summary { padding: 12px 3px; min-height: 44px; font-size: 14px; font-weight: 600; cursor: pointer; color: var(--text2); }
.site .site-tool-card { padding: 24px; border-radius: 10px; background: var(--surface); border: 1px solid var(--border); box-shadow: none; }
.site .tool-head { align-items: center; flex-wrap: wrap; gap: 12px; }
.site .tool-head h3 { font: 700 19px/1.3 var(--ui); letter-spacing: -.2px; }
.site .tool-tag { font: 500 12px/1.4 var(--ui); text-transform: none; letter-spacing: 0; border: 0; padding: 0; background: transparent; color: var(--text3); }
.site .tool-head .unit-toggle { margin-left: auto; }
.site .tool-fields { grid-template-columns: minmax(90px, .55fr) minmax(0, 1fr); gap: 12px 16px; }
.site .tool-fields label { font: 600 14px/1.4 var(--ui); text-transform: none; letter-spacing: 0; color: var(--text2); }
.site .tool-fields input[type=number], .site .tool-fields select { min-height: 48px; font: 500 16px var(--ui); border-radius: 6px; box-shadow: none; }
.site .tool-result { background: var(--surface2); border: 1px solid var(--border); border-radius: 6px; font: 500 15px/1.6 var(--ui); padding: 14px; }
.site .tire-presets { grid-column: 1 / -1; gap: 7px; margin: 2px 0 6px; }
.site .tire-preset { min-height: 40px; padding: 8px 10px; border-radius: 5px; font: 500 13px/1.3 var(--ui); }
.site .advanced-toggle { min-height: 44px; margin-block: 12px; font: 600 13px/1.4 var(--ui); letter-spacing: 0; text-transform: none; }
.site .hookless-label { grid-column: 1 / -1; min-height: 40px; display: flex; align-items: center; gap: 8px; }
.site .hookless-label input { width: 20px; height: 20px; }
.site .pressure-gauge { border: 1px solid var(--border); border-radius: 8px; background: var(--surface2); box-shadow: none; }
.site .pressure-gauge::after { display: none; }
.site .gauge-label { font: 600 13px var(--ui); letter-spacing: 0; text-transform: none; }
.site .gauge-val { font: 700 32px/1.2 var(--ui); letter-spacing: -1px; }
.site .gauge-psi { font: 500 13px var(--ui); }
.site .choice-btn { letter-spacing: 0; font-size: 14px; min-height: 44px; }
.site :is(button, select, a, summary):focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.site-ad-slot:not([hidden]) { overflow: hidden; margin-block: 24px; }
.site-ad-slot[data-ad-slot=home-inline]:not([hidden]) { min-height: 100px; }
.site-ad-slot[data-ad-slot$=rail]:not([hidden]) { min-height: 250px; }

/* Articles use the same page grid; illustrations stay beside their explanation. */
.site-article .main-inner { display: block !important; max-width: 1080px; }
.site-breadcrumb { display: flex; gap: 10px; color: var(--text3); font-size: 12px; margin: 0 0 20px; }
.site-breadcrumb a { text-underline-offset: 3px; }
.site-article .article-hero { display: block; margin-bottom: 32px; padding-bottom: 28px; }
.site-article .article-hero-copy { width: 100%; }
.site-article .eyebrow { font: 650 12px/1.4 var(--ui); letter-spacing: .02em; margin-bottom: 10px; color: var(--accent); }
.site-article .page-h1 { font: 750 clamp(30px, 3.8vw, 42px)/1.16 var(--ui); letter-spacing: -1.2px; max-width: 30ch; margin: 0 0 16px; text-wrap: balance; }
.site-article .hero-sub { font: 400 17px/1.65 var(--ui); color: var(--text2); max-width: 68ch; }
.site-article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; align-items: start; }
.site-article-body { min-width: 0; }
.site-article .article-content { display: block; max-width: 100%; margin: 0; }
.site-article .article-content > section, .site-article .article-content .faq-item { border: 0; background: transparent; padding: 0; margin-bottom: 32px; border-radius: 0; }
.site-article .article-content h2 { font: 700 24px/1.3 var(--ui); letter-spacing: -.5px; margin: 0 0 12px; scroll-margin-top: 24px; }
.site-article .article-content h3 { font: 650 18px/1.4 var(--ui); letter-spacing: -.2px; margin: 22px 0 8px; }
.site-article .article-content p, .site-article .article-content li { font: 400 16px/1.75 var(--ui); color: var(--text2); }
.site-article .article-content p + p { margin-top: 12px; }
.site-article .article-content ul, .site-article .article-content ol { margin-block: 14px; }
.site-article .article-content > .quick-box, .site-article .article-content > .article-note { border: 1px solid var(--border); background: var(--surface2); padding: 20px; border-radius: 8px; }
.site-article .article-content > .article-links { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border); }
.site .article-cta { background: var(--surface2); padding: 16px; border: 1px solid var(--border); border-radius: 6px; margin-top: 16px; text-decoration: none; }
.site .article-cta a { display: inline-flex; align-items: center; min-height: 44px; max-width: 100%; color: var(--accent-text); font: 650 14px/1.5 var(--ui); letter-spacing: 0; text-transform: none; }
.site .article-cta a:hover { background: var(--accent-strong); }
.site-article-sidebar { display: flex; flex-direction: column; gap: 30px; min-width: 0; }
.site-article-tools { background: var(--surface2); padding: 20px; border-radius: 8px; }
.site-article-sidebar h2 { font: 700 16px/1.4 var(--ui); margin-bottom: 10px; }
.site-article-sidebar a { display: block; font-size: 13px; line-height: 1.5; padding-block: 8px; text-underline-offset: 3px; }
.site-toc { border-left: 1px solid var(--border); padding-left: 20px; }
.site-toc a { color: var(--text2); text-decoration: none; }
.site-toc a:hover { color: var(--accent); text-decoration: underline; }
.site-figure { max-width: 540px; margin: 24px auto 0; }
.site-figure img { display: block; width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border); background: #fff; }
.site-figure figcaption { color: var(--text3); font: 400 12px/1.6 var(--ui); text-align: center; margin-top: 10px; }
.site .author-box { background: transparent; padding: 20px 0; border: 0; border-top: 1px solid var(--border); border-radius: 0; margin-top: 30px; }
.site .author-box p { font-size: 13px; line-height: 1.6; }
@media (max-width: 900px) {
  .site-workspace { grid-template-columns: 1fr; max-width: 700px; margin: auto; }
  .site-sidebar { display: none; }
  .site-hero { max-width: 700px; margin-inline: auto; }
  .site-guide-list { column-gap: 24px; }
  .site-menu { gap: 16px; }
  .site-article-layout { grid-template-columns: 1fr; gap: 28px; max-width: 700px; margin: auto; }
  .site-article .article-hero, .site-breadcrumb { max-width: 700px; margin-inline: auto; }
  .site-article-sidebar { border-top: 1px solid var(--border); padding-top: 24px; }
  .site-toc { display: none; }
  .site-article-tools a { display: inline-block; margin-right: 20px; }
}
@media (max-width: 600px) {
  .site .site-shell { width: calc(100% - 32px); }
  .site-header > .site-shell { min-height: 62px; gap: 14px; }
  .site-menu { margin-left: auto; margin-right: 0; }
  .site-menu a:not(:last-child) { display: none; }
  .site-controls { gap: 5px; }
  .site .site-controls select { padding: 8px 5px; min-height: 44px; font-size: 16px; }
  .site .theme-toggle { padding: 8px; min-height: 44px; font-size: 12px; }
  .site .site-brand { font-size: 23px; }
  .site main { padding-top: 22px; }
  .site-notice { font-size: 10px; }
  .site .site-hero h1 { font-size: 32px; letter-spacing: -1px; max-width: 350px; }
  .site-hero > p:last-child { font-size: 13px; max-width: 310px; }
  .site-hero { margin-bottom: 16px; }
  .site .site-tool-nav .site-tool-tab { font-size: 12px; padding: 11px 4px; }
  .site .calc-form { padding: 18px; gap: 16px; }
  .site .radio-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .site .field-hint { font-size: 11px; }
  .site .calc-form .field-pair { gap: 12px; }
  .site .field input { font-size: 18px; padding-left: 11px; }
  .site #results.show { padding: 15px; }
  .site .res-cell-val.telaio { font-size: 29px; }
  .site-guide-list { grid-template-columns: 1fr; }
  .site-section-heading { display: block; }
  .site .site-section-heading h2 { font-size: 22px; margin-bottom: 5px; }
  .site-guide-link { padding-block: 17px; }
  .site-footer > .site-shell { align-items: flex-start; flex-direction: column; gap: 12px; }
  .site .site-method { font-size: 11px; }
  .site .site-tool-card { padding: 18px; }
  .site .tool-fields { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .site .tool-fields label:not(:first-child) { margin-top: 8px; }
  .site .tool-head h3 { font-size: 18px; }
  .site-article .article-hero { padding-bottom: 22px; margin-bottom: 24px; }
  .site-article .hero-sub { font-size: 15px; }
  .site-article .article-content h2 { font-size: 22px; }
  .site-article .article-content p, .site-article .article-content li { font-size: 16px; line-height: 1.7; }
}
@media (max-width: 350px) {
  .site-menu { display: none; }
  .site-controls { margin-left: auto; }
  .site .site-hero h1 { font-size: 29px; }
  .site .calc-form { padding: 14px; }
  .site-form-heading { font-size: 17px; }
  .site .res-main { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .site *, .site *::before, .site *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}