.developer-sizing-link { position: relative; z-index: 1; padding: 40px 0 75px; border-bottom: 1px solid var(--border); }
.developer-sizing-link .content-shell { padding: 30px; border: 1px solid var(--border-accent); background: linear-gradient(115deg, rgba(34,211,238,.08), rgba(255,255,255,.015)); }
.developer-sizing-link h2 { margin: 12px 0 8px; font-size: clamp(1.8rem, 3vw, 2.8rem); }
.developer-sizing-link p:not(.signal-label) { max-width: 730px; margin: 0 0 20px; color: var(--muted); }

.sizing-hero .content-shell { padding-block: 75px 70px; }
.sizing-hero h1 { margin: 15px 0; }
.sizing-hero > .content-shell > p:not(.signal-label) { max-width: 750px; margin: 0 0 20px; color: var(--muted); }
.sizing-section { position: relative; z-index: 1; padding: 65px 0 90px; }
.sizing-intro { display: flex; justify-content: space-between; align-items: end; gap: 35px; margin-bottom: 28px; }
.sizing-intro h2, .sizing-evidence h2 { margin: 9px 0 0; font-size: clamp(2rem, 4vw, 3.2rem); }
.sizing-intro > p { max-width: 485px; margin: 0; color: var(--muted); font-size: .9rem; }
.sizing-guides { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 0 0 28px; }
.sizing-guides article { padding: 21px 22px; border: 1px solid var(--border); background: rgba(255,255,255,.025); }
.sizing-guides span { color: var(--accent); font-size: .7rem; font-weight: 800; letter-spacing: .14em; }
.sizing-guides h3 { margin: 8px 0 7px; font-size: .99rem; }
.sizing-guides p { margin: 0; color: var(--muted); font-size: .8rem; line-height: 1.55; }
.sizing-workbench { overflow: hidden; border: 1px solid var(--border-accent); background: rgba(4,11,26,.8); box-shadow: var(--shadow-panel); }
.sizing-tabs { display: flex; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.025); }
.sizing-tab { padding: 17px 24px; border: 0; border-right: 1px solid var(--border); background: transparent; color: var(--muted); cursor: pointer; font-size: .9rem; font-weight: 700; }
.sizing-tab.is-active { background: rgba(34,211,238,.09); color: var(--text); box-shadow: inset 0 -3px var(--accent-strong); }
.sizing-tab:hover { color: var(--accent); }
.sizing-workbench__grid { display: grid; grid-template-columns: minmax(290px, .88fr) minmax(360px, 1.12fr); }
.sizing-form { display: grid; align-content: start; gap: 18px; padding: clamp(24px, 3vw, 38px); border-right: 1px solid var(--border); }
.sizing-fields { display: grid; gap: 18px; }
.sizing-fields[hidden], .sizing-form__error[hidden] { display: none !important; }
.sizing-presets { display: grid; gap: 8px; }
.sizing-presets > span { color: var(--text); font-size: .83rem; font-weight: 750; }
.sizing-presets__choices { display: flex; flex-wrap: wrap; gap: 7px; }
.sizing-presets__choices button { padding: 8px 10px; border: 1px solid rgba(165,243,252,.25); border-radius: 3px; background: #0b1628; color: var(--text); cursor: pointer; font: inherit; font-size: .72rem; }
.sizing-presets__choices button:hover, .sizing-presets__choices button.is-active { border-color: var(--accent-strong); background: rgba(34,211,238,.1); }
.sizing-presets small { color: var(--soft); font-size: .72rem; line-height: 1.45; }
.sizing-field { display: grid; gap: 6px; }
.sizing-field label { color: var(--text); font-size: .83rem; font-weight: 750; }
.sizing-field input, .sizing-field select { width: 100%; min-height: 44px; padding: 8px 11px; border: 1px solid rgba(165,243,252,.25); border-radius: 3px; background: #0b1628; color: var(--text); color-scheme: dark; }
.sizing-field input:focus, .sizing-field select:focus { border-color: var(--accent-strong); outline: 2px solid rgba(103,232,249,.18); outline-offset: 1px; }
.sizing-field small { color: var(--soft); font-size: .72rem; line-height: 1.45; }
.sizing-submit { justify-content: center; margin-top: 5px; }
.sizing-form__error { margin: 0; color: var(--danger); font-size: .82rem; font-weight: 700; }
.sizing-results { align-self: stretch; padding: clamp(27px, 4vw, 48px); background: radial-gradient(circle at 98% 0, rgba(34,211,238,.08), transparent 45%), rgba(6,16,34,.6); }
.sizing-results__eyebrow { color: var(--accent); font-size: .68rem; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.sizing-results h3 { max-width: 600px; margin: 12px 0 14px; font-size: clamp(1.8rem, 3.5vw, 2.7rem); line-height: 1.1; }
.sizing-results > p { max-width: 620px; margin: 0 0 25px; color: var(--muted); font-size: .88rem; }
.sizing-metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.sizing-metric { display: grid; align-content: start; gap: 2px; min-height: 110px; padding: 17px; border: 1px solid var(--border); background: rgba(255,255,255,.03); }
.sizing-metric span { color: var(--soft); font-size: .68rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }
.sizing-metric strong { color: var(--text); font-size: clamp(1.5rem, 2.7vw, 2rem); font-weight: 650; line-height: 1.2; }
.sizing-metric small { color: var(--soft); font-size: .7rem; }
.sizing-household { display: grid; gap: 11px; margin-top: 20px; }
.sizing-household > strong { color: var(--text); font-size: .84rem; }
.sizing-household__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.sizing-household__case { display: grid; gap: 5px; padding: 12px; border: 1px solid var(--border); background: rgba(255,255,255,.025); }
.sizing-household__case span { color: var(--soft); font-size: .7rem; }
.sizing-household__case strong { color: var(--text); font-size: .76rem; }
.sizing-household__case.is-headroom strong { color: var(--accent); }
.sizing-household__case.is-no-fit strong { color: var(--danger); }
.sizing-household > small { color: var(--soft); font-size: .72rem; line-height: 1.45; }
.sizing-notes { display: grid; gap: 8px; margin: 23px 0 0; padding-left: 19px; color: var(--muted); font-size: .8rem; }
.sizing-results .sizing-result-help { margin: 19px 0 0; color: var(--muted); font-size: .81rem; line-height: 1.55; }
.sizing-calculation, .sizing-evidence__details { margin-top: 21px; padding: 15px 18px; border: 1px solid var(--border); background: rgba(255,255,255,.02); }
.sizing-calculation summary, .sizing-evidence__details summary { color: var(--accent); cursor: pointer; font-size: .8rem; font-weight: 750; }
.sizing-calculation p { margin: 12px 0 0; color: var(--soft); font-size: .76rem; line-height: 1.6; }
.sizing-evidence { margin-top: 75px; }
.sizing-evidence h2 { margin-bottom: 24px; }
.sizing-evidence__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.sizing-evidence__grid article { padding: 24px; border: 1px solid var(--border); background: rgba(255,255,255,.025); }
.sizing-evidence__grid strong { color: var(--accent); font-size: 2rem; font-weight: 550; }
.sizing-evidence__grid h3 { margin: 6px 0; font-size: .96rem; }
.sizing-evidence__grid p { margin: 0; color: var(--muted); font-size: .79rem; }
.sizing-evidence__data { margin-top: 22px; padding: 22px 24px; border: 1px solid var(--border); background: rgba(255,255,255,.025); }
.sizing-evidence__data h3 { margin: 0 0 8px; font-size: 1.05rem; }
.sizing-evidence__data p { max-width: 900px; margin: 0 0 14px; color: var(--muted); font-size: .79rem; line-height: 1.55; }
.sizing-evidence__data p:last-child { margin: 12px 0 0; }
.sizing-evidence__table-scroll { overflow-x: auto; }
.sizing-evidence__data table { width: 100%; min-width: 620px; border-collapse: collapse; color: var(--text); font-size: .77rem; text-align: left; }
.sizing-evidence__data th, .sizing-evidence__data td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.sizing-evidence__data thead th { color: var(--soft); font-size: .69rem; text-transform: uppercase; letter-spacing: .05em; }
.sizing-evidence__data tbody tr:last-child th, .sizing-evidence__data tbody tr:last-child td { border-bottom: 0; }
.sizing-evidence__note { max-width: 1030px; margin: 24px 0 0; color: var(--soft); font-size: .76rem; line-height: 1.7; }
.sizing-evidence__details .sizing-evidence__note { margin-top: 12px; }
.sizing-evidence__note code { overflow-wrap: anywhere; color: var(--muted); }
@media (max-width: 920px) {
  .sizing-intro { align-items: flex-start; flex-direction: column; gap: 12px; }
  .sizing-workbench__grid { grid-template-columns: 1fr; }
  .sizing-form { border-right: 0; border-bottom: 1px solid var(--border); }
  .sizing-evidence__grid { grid-template-columns: 1fr; }
  .sizing-guides { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .sizing-hero .content-shell { padding-block: 52px; }
  .sizing-tabs { display: grid; grid-template-columns: 1fr 1fr; }
  .sizing-tab { padding: 14px 9px; font-size: .76rem; }
  .sizing-metrics { grid-template-columns: 1fr; }
  .sizing-metric { min-height: 0; }
  .sizing-household__grid { grid-template-columns: 1fr; }
}