:root {
  --ink: #18211e;
  --muted: #68736e;
  --line: #dce3e0;
  --line-strong: #b9c5c0;
  --paper: #ffffff;
  --surface: #f5f7f6;
  --green: #18764c;
  --green-soft: #e8f3ed;
  --red: #b42318;
  --red-soft: #fcecea;
  --amber: #7a5700;
  --amber-soft: #fff4d6;
  --blue: #2f6fce;
  --teal: #0f766e;
  --coral: #d45a3d;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--surface);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { min-width: 320px; margin: 0; background: var(--surface); }
button, input, select { font: inherit; }
a, button, input[type="range"], summary { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid rgba(47, 111, 206, 0.22); outline-offset: 2px; }
h1, h2, h3, p { margin-top: 0; }
[hidden] { display: none !important; }

.topbar {
  min-height: 58px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: white;
}

.brand, .paper-link { color: var(--ink); text-decoration: none; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 750; }
.brand-mark { width: 27px; height: 27px; display: grid; place-items: center; background: var(--ink); color: white; font-size: 12px; }
.paper-link { font-size: 13px; font-weight: 680; }
.paper-link:hover { color: var(--blue); }

main { max-width: 1100px; margin: 0 auto; background: var(--paper); box-shadow: 0 16px 42px rgba(24, 33, 30, 0.06); }
.eyebrow { margin: 0 0 8px; color: var(--muted); font-size: 11px; line-height: 1.2; font-weight: 800; text-transform: uppercase; }

.intro { padding: 46px 56px 40px; border-bottom: 1px solid var(--line); }
.intro h1 { max-width: 760px; margin-bottom: 13px; font-size: 42px; line-height: 1.08; letter-spacing: 0; }
.intro > p:last-child { max-width: 800px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.65; }

.model-overview { padding: 38px 56px 42px; border-bottom: 1px solid var(--line); background: #fbfcfb; }
.overview-copy { max-width: 800px; margin-bottom: 26px; }
.overview-copy h2 { margin-bottom: 9px; font-size: 26px; line-height: 1.25; }
.overview-copy > p:last-child { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.6; }

.concept-grid { margin-bottom: 28px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 42px; }
.concept-grid article { min-width: 0; padding-left: 16px; border-left: 2px solid var(--blue); }
.concept-grid article:last-child { border-left-color: var(--teal); }
.concept-grid article > span { display: block; margin-bottom: 8px; color: var(--muted); font-size: 10px; font-weight: 800; text-transform: uppercase; }
.concept-grid h3 { margin-bottom: 7px; font-size: 16px; line-height: 1.4; }
.concept-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }

.flow-diagram { padding: 18px 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr) auto) minmax(0, 1fr); align-items: center; gap: 16px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.flow-diagram > div { min-width: 0; min-height: 82px; padding: 13px 8px; display: flex; flex-direction: column; justify-content: center; border-top: 2px solid var(--line-strong); }
.flow-diagram > div:nth-of-type(1) { border-top-color: var(--blue); }
.flow-diagram > div:nth-of-type(3) { border-top-color: var(--coral); }
.flow-diagram > div:nth-of-type(4) { border-top-color: var(--teal); }
.flow-diagram div > span { margin-bottom: 9px; color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 10px; }
.flow-diagram b { margin-bottom: 4px; font-size: 13px; }
.flow-diagram small { color: var(--muted); font-size: 11px; line-height: 1.45; }
.flow-diagram > i { color: var(--line-strong); font-style: normal; }

.choice-summary { margin-top: 22px; padding: 3px 0 3px 16px; border-left: 2px solid var(--coral); }
.choice-summary > span { display: block; margin-bottom: 5px; color: var(--muted); font-size: 10px; font-weight: 800; text-transform: uppercase; }
.choice-summary p { max-width: 800px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.choice-summary b { color: var(--ink); }
.overview-note { margin: 8px 0 0 18px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.overview-note b { color: var(--ink); }

.estimator { padding: 0 56px 46px; }
.estimator-section { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 22px; padding-top: 42px; }
.section-number { width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid var(--line-strong); color: var(--muted); font-size: 10px; font-weight: 800; }
.section-body { min-width: 0; padding-bottom: 44px; border-bottom: 1px solid var(--line); }
.estimator-section:last-child .section-body { border-bottom: 0; padding-bottom: 0; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; }
.section-heading h2 { margin: 0; font-size: 25px; line-height: 1.25; }
.section-copy { max-width: 800px; margin: 11px 0 23px; color: var(--muted); font-size: 14px; line-height: 1.65; }
.section-copy code { color: var(--ink); font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 12px; }

.shortcut-guide { margin: -5px 0 20px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.shortcut-guide summary { min-height: 56px; padding: 10px 2px; display: flex; align-items: center; justify-content: space-between; gap: 18px; list-style: none; cursor: pointer; }
.shortcut-guide summary::-webkit-details-marker { display: none; }
.shortcut-guide summary > span { display: flex; flex-direction: column; gap: 3px; }
.shortcut-guide summary b { font-size: 13px; }
.shortcut-guide summary small { color: var(--muted); font-size: 11px; }
.shortcut-guide summary > i { color: var(--muted); font-style: normal; font-size: 18px; transition: transform 150ms ease; }
.shortcut-guide[open] summary > i { transform: rotate(45deg); }
.guide-copy { padding: 16px 2px 17px; border-top: 1px solid var(--line); }
.guide-copy p { max-width: 800px; margin: 0 0 9px; color: var(--muted); font-size: 12px; line-height: 1.65; }
.guide-copy p:last-child { margin-bottom: 0; }
.shortcut-method { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.shortcut-method > div { min-width: 0; padding: 14px 15px; display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 9px; border-left: 1px solid var(--line); }
.shortcut-method > div:first-child { border-left: 0; }
.shortcut-method span { width: 20px; height: 20px; display: grid; place-items: center; border: 1px solid var(--line-strong); color: var(--muted); font-size: 10px; font-weight: 800; }
.shortcut-method p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.shortcut-method strong { color: var(--ink); }

.status-tag { flex: 0 0 auto; padding: 6px 9px; border: 1px solid #a9d3ba; background: var(--green-soft); color: var(--green); font-size: 10px; font-weight: 800; text-transform: uppercase; }
.status-tag.fail { border-color: #efb5b0; background: var(--red-soft); color: var(--red); }
.status-tag.warn { border-color: #e2cb91; background: var(--amber-soft); color: var(--amber); }
.status-tag.plan { border-color: #a9c5ea; background: #edf4ff; color: var(--blue); }

.unit-setting { margin-bottom: 20px; padding: 16px 18px; border-left: 3px solid var(--blue); background: #f5f8fc; }
.unit-setting label { display: grid; grid-template-columns: minmax(0, 1fr) 220px; align-items: center; gap: 24px; }
.unit-setting label > span { display: flex; flex-direction: column; gap: 4px; }
.unit-setting b { font-size: 14px; }
.unit-setting small, .unit-setting > p { color: var(--muted); font-size: 11px; line-height: 1.5; }
.unit-setting > p { max-width: 760px; margin: 9px 244px 0 0; }
.unit-symbol { margin-right: 2px; }

.mode-switch { width: fit-content; margin-bottom: 18px; padding: 3px; display: flex; border: 1px solid var(--line-strong); border-radius: 4px; background: white; }
.mode-switch button { min-height: 36px; padding: 0 14px; border: 0; border-radius: 2px; background: transparent; color: var(--muted); font-size: 12px; font-weight: 750; cursor: pointer; }
.mode-switch button.active { background: var(--ink); color: white; }
.planning-panel { margin-bottom: 18px; padding: 20px; background: var(--surface); }
.planning-inputs { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.planning-inputs .number-box { max-width: none; }
.target-result { margin-top: 18px; padding-top: 17px; display: grid; grid-template-columns: 280px minmax(0, 1fr); align-items: center; gap: 24px; border-top: 1px solid var(--line); }
.target-result > div { display: flex; flex-direction: column; gap: 4px; }
.target-result span { color: var(--muted); font-size: 11px; font-weight: 700; }
.target-result strong { font-size: 30px; line-height: 1; }
.target-result p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
.target-result.fail strong { color: var(--red); }
.target-note { margin: 14px 0 0; padding-top: 13px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.55; }

.audit-diagnostics { margin-bottom: 20px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.audit-diagnostics label { padding: 16px 0 7px; display: grid; grid-template-columns: minmax(0, 1fr) 220px; align-items: center; gap: 24px; }
.audit-diagnostics label:nth-of-type(2) { border-top: 1px solid var(--line); }
.audit-diagnostics label > span { display: flex; flex-direction: column; gap: 4px; }
.audit-diagnostics label b { font-size: 14px; line-height: 1.4; }
.audit-diagnostics label small { color: var(--muted); font-size: 11px; line-height: 1.5; }
.audit-diagnostics > p { max-width: 760px; margin: 0; padding: 0 244px 15px 0; color: var(--muted); font-size: 11px; line-height: 1.5; }
select { width: 100%; min-width: 0; height: 40px; padding: 0 34px 0 10px; border: 1px solid var(--line-strong); border-radius: 3px; background-color: white; color: var(--ink); font-size: 12px; }

.calibration-tool { margin-bottom: 18px; padding: 20px; background: var(--surface); }
.regime-select { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 360px); align-items: center; gap: 24px; }
.regime-select > span { font-size: 14px; font-weight: 750; }
#regimeDescription { max-width: 760px; margin: 10px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.regime-panel { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.calibration-inputs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.calibration-inputs.two-inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.calibration-inputs .number-box { max-width: none; }
.calibration-inputs .span-two { grid-column: span 2; }
.panel-note { max-width: 790px; margin: 13px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; }
.calibration-result { margin-top: 18px; padding-top: 16px; display: grid; grid-template-columns: 230px minmax(0, 1fr); align-items: center; gap: 24px; border-top: 1px solid var(--line); }
.calibration-result > div { display: flex; flex-direction: column; gap: 3px; }
.calibration-result span { color: var(--muted); font-size: 11px; font-weight: 700; }
.calibration-result strong { font-size: 25px; line-height: 1; }
.calibration-result p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.audit-rate { min-height: 72px; padding: 14px 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 430px); align-items: center; gap: 28px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.audit-rate > span { display: flex; flex-direction: column; gap: 4px; }
.audit-rate b { font-size: 14px; }
.audit-rate small { color: var(--muted); font-size: 11px; line-height: 1.5; }

.control-grid { display: grid; gap: 1px; border: 1px solid var(--line); background: var(--line); }
.three-columns { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; border: 0; background: transparent; }
.control { min-width: 0; min-height: 145px; padding: 19px; display: flex; flex-direction: column; justify-content: space-between; gap: 14px; background: white; }
.control > span { min-height: 38px; font-size: 14px; line-height: 1.4; font-weight: 720; }
.control > small { min-height: 16px; color: var(--muted); font-size: 12px; line-height: 1.4; }
.control > small b { color: var(--ink); }
.control.channel { min-height: 154px; border: 1px solid var(--line); border-top: 2px solid var(--blue); }
.control.channel.future { border-top-color: var(--teal); }

.range-row { min-width: 0; display: grid; grid-template-columns: minmax(60px, 1fr) 92px; align-items: center; gap: 13px; }
input[type="range"] { width: 100%; min-width: 0; height: 4px; accent-color: var(--teal); }
.number-box { min-width: 0; height: 38px; display: flex; align-items: center; border: 1px solid var(--line-strong); border-radius: 3px; background: white; overflow: hidden; }
.number-box input { width: 100%; min-width: 0; height: 36px; padding: 0 9px; border: 0; background: transparent; color: var(--ink); font-size: 13px; }
.number-box > span { flex: 0 0 auto; padding: 0 8px; color: var(--muted); font-size: 10px; font-weight: 700; }
.number-box.prefix > span { border-right: 1px solid var(--line); }
.number-box.suffix > span { border-left: 1px solid var(--line); }
.number-box:focus-within { outline: 3px solid rgba(47, 111, 206, 0.2); outline-offset: 2px; }
.number-box input:focus { outline: 0; }

.text-button, .small-button { border: 1px solid var(--line-strong); border-radius: 3px; background: white; color: var(--ink); font-weight: 750; cursor: pointer; }
.text-button { min-height: 36px; padding: 0 12px; font-size: 11px; }
.small-button { min-height: 30px; padding: 0 10px; font-size: 10px; }
.text-button:hover, .small-button:hover { background: var(--surface); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.result-line { min-height: 88px; margin-top: 14px; padding: 18px 20px; display: grid; grid-template-columns: 220px 1fr; align-items: center; gap: 24px; border-left: 3px solid var(--coral); background: #fff7f3; }
.result-line > div { display: flex; flex-direction: column; gap: 4px; }
.result-line span { color: var(--muted); font-size: 11px; font-weight: 700; }
.result-line strong { font-size: 28px; line-height: 1; }
.result-line p { margin: 0; color: #665b56; font-size: 13px; line-height: 1.55; }
.result-line.fail { border-left-color: var(--red); background: var(--red-soft); }

.coverage { margin-top: 14px; padding: 17px 19px; background: var(--surface); }
.coverage-label { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 12px; }
.coverage-label strong { color: var(--ink); }
.coverage-track { position: relative; height: 14px; margin: 12px 0 10px; display: flex; background: #dfe6e3; overflow: hidden; }
.coverage-track > span { height: 100%; transition: width 160ms ease; }
.coverage-track > span:first-child { background: var(--blue); }
.coverage-track > span:nth-child(2) { background: var(--teal); }
.coverage-track > i { position: absolute; inset: 0 1px 0 auto; width: 2px; background: var(--ink); }
.coverage-legend { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; color: var(--muted); font-size: 11px; }
.coverage-legend span { display: inline-flex; align-items: center; gap: 5px; }
.coverage-legend i { width: 7px; height: 7px; }
.immediate-key { background: var(--blue); }
.future-key { background: var(--teal); }
.coverage-legend b { color: var(--ink); }
.coverage-legend > strong { margin-left: auto; color: var(--green); font-size: 10px; }
.coverage-legend > strong.fail { color: var(--red); }

.details-panel { margin-top: 16px; border: 1px solid var(--line); }
.details-panel summary { min-height: 60px; padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 18px; list-style: none; cursor: pointer; }
.details-panel summary::-webkit-details-marker { display: none; }
.details-panel summary > span { display: flex; flex-direction: column; gap: 3px; }
.details-panel summary b { font-size: 13px; }
.details-panel summary small { color: var(--muted); font-size: 11px; }
.details-panel summary > i { color: var(--muted); font-style: normal; font-size: 16px; transition: transform 150ms ease; }
.details-panel[open] summary > i { transform: rotate(45deg); }
.details-content { padding: 18px; border-top: 1px solid var(--line); }
.details-content > p { margin-bottom: 15px; color: var(--muted); font-size: 12px; line-height: 1.6; }

.comparison-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.comparison-grid > div { padding: 15px; border: 1px solid var(--line); }
.comparison-grid > div > span { display: block; margin-bottom: 9px; font-size: 12px; font-weight: 800; }
.comparison-grid dl { margin: 0; }
.comparison-grid dl > div { min-height: 29px; display: flex; align-items: center; justify-content: space-between; gap: 14px; border-top: 1px solid var(--line); }
.comparison-grid dl > div:last-child { border-bottom: 1px solid var(--line); background: var(--surface); padding: 0 5px; }
.comparison-grid dt { color: var(--muted); font-size: 11px; }
.comparison-grid dd { margin: 0; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 11px; font-weight: 750; }
.comparison-action { margin-top: 13px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.comparison-action p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.5; }

.guardrail-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.guardrail-block { min-width: 0; padding: 18px; border: 1px solid var(--line); }
.guardrail-heading { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 15px; }
.guardrail-heading h3 { margin: 0; font-size: 16px; }
.simple-input { min-width: 0; display: flex; flex-direction: column; gap: 7px; }
.simple-input > span { min-height: 15px; color: #4f5b57; font-size: 12px; font-weight: 680; }
.simple-input > .number-box { max-width: 180px; }
.simple-input-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.simple-input-grid .number-box { max-width: none; }
.recommendation-row { min-height: 42px; margin-top: 14px; padding: 7px 9px; display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 10px; background: var(--surface); }
.recommendation-row > span { color: var(--muted); font-size: 11px; line-height: 1.35; }
.recommendation-row > strong { font-size: 12px; }
.guardrail-block > p { margin: 10px 0 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.assumptions-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 13px; }
.assumptions-grid .number-box { max-width: none; }

.final-status { min-height: 108px; margin-top: 18px; padding: 20px; display: flex; align-items: center; gap: 16px; border: 1px solid #a9d3ba; background: var(--green-soft); }
.final-status.fail { border-color: #efb5b0; background: var(--red-soft); }
.final-status.warn { border-color: #e2cb91; background: var(--amber-soft); }
.final-status.plan { border-color: #a9c5ea; background: #edf4ff; }
.status-icon { width: 32px; height: 32px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: white; font-size: 15px; font-weight: 850; }
.final-status.fail .status-icon { background: var(--red); }
.final-status.warn .status-icon { background: var(--amber); }
.final-status.plan .status-icon { background: var(--blue); }
.final-status > div { min-width: 0; flex: 1; }
.final-status h2 { margin: 0 0 3px; font-size: 17px; }
.final-status div > p:last-child { margin: 0; color: #4d6058; font-size: 12px; line-height: 1.55; }
.final-status.fail div > p:last-child { color: #754943; }
.final-status.warn div > p:last-child { color: #6b5a2c; }
.final-status.plan div > p:last-child { color: #405b7b; }
.input-error { margin-top: 10px; padding: 10px 12px; border: 1px solid #efb5b0; background: var(--red-soft); color: var(--red); font-size: 12px; line-height: 1.5; }

.scope-note { padding: 30px 56px 34px; display: grid; grid-template-columns: 120px 1fr; gap: 24px; border-top: 1px solid var(--line); background: var(--ink); color: white; }
.scope-note h2 { margin: 0; font-size: 16px; }
.scope-note p { margin: 0; color: #c2cbc7; font-size: 12px; line-height: 1.6; }
footer { max-width: 1100px; min-height: 54px; margin: 0 auto; padding: 0 28px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 11px; }
footer a { color: var(--ink); font-weight: 700; }

@media (max-width: 860px) {
  .intro, .model-overview, .estimator, .scope-note { padding-left: 30px; padding-right: 30px; }
  .flow-diagram { grid-template-columns: repeat(2, minmax(0, 1fr) auto) minmax(0, 1fr); }
  .flow-diagram > div:last-of-type { grid-column: 3 / 6; }
  .three-columns { grid-template-columns: 1fr; }
  .shortcut-method { grid-template-columns: 1fr; }
  .shortcut-method > div { border-left: 0; border-top: 1px solid var(--line); }
  .shortcut-method > div:first-child { border-top: 0; }
  .control { min-height: 118px; }
  .control > span, .control > small { min-height: 0; }
  .assumptions-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .calibration-inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .topbar { min-height: 52px; padding: 0 18px; }
  .brand { font-size: 13px; }
  .paper-link { font-size: 12px; }
  .intro, .model-overview { padding: 32px 20px; }
  .intro h1 { font-size: 32px; }
  .intro > p:last-child { font-size: 15px; }
  .overview-copy h2 { font-size: 23px; }
  .concept-grid { grid-template-columns: 1fr; gap: 24px; }
  .flow-diagram { grid-template-columns: 1fr; }
  .flow-diagram > div:last-of-type { grid-column: 1; }
  .flow-diagram > i { text-align: center; transform: rotate(90deg); }
  .estimator { padding: 0 20px 36px; }
  .estimator-section { grid-template-columns: 1fr; gap: 12px; padding-top: 34px; }
  .section-body { padding-bottom: 34px; }
  .section-heading { flex-direction: column; }
  .section-heading h2 { font-size: 22px; }
  .unit-setting label, .audit-diagnostics label, .regime-select, .calibration-result, .audit-rate, .target-result { grid-template-columns: 1fr; gap: 10px; }
  .mode-switch { width: 100%; }
  .mode-switch button { min-width: 0; flex: 1; padding: 0 9px; }
  .unit-setting > p { margin-right: 0; }
  .audit-diagnostics > p { padding-right: 0; }
  .calibration-tool { padding: 17px; }
  .calibration-inputs, .calibration-inputs.two-inputs { grid-template-columns: 1fr; }
  .calibration-inputs .span-two { grid-column: auto; }
  .two-columns, .guardrail-grid, .comparison-grid { grid-template-columns: 1fr; }
  .result-line { grid-template-columns: 1fr; gap: 10px; }
  .coverage-legend > strong { width: 100%; margin-left: 0; }
  .comparison-action { align-items: flex-start; flex-direction: column; }
  .simple-input-grid, .assumptions-grid { grid-template-columns: 1fr; }
  .recommendation-row { grid-template-columns: 1fr auto; }
  .recommendation-row .small-button { grid-column: 1 / -1; }
  .final-status { align-items: flex-start; flex-wrap: wrap; }
  .final-status > .status-tag { margin-left: 48px; }
  .scope-note { padding: 26px 20px 30px; grid-template-columns: 1fr; gap: 9px; }
  footer { padding: 17px 20px; align-items: flex-start; flex-direction: column; }
}

@media (max-width: 420px) {
  .brand-mark { display: none; }
  .intro h1 { font-size: 29px; }
  .range-row { grid-template-columns: minmax(0, 1fr) 84px; gap: 9px; }
}