/* Known Quantity shared measure-page styles (standalone single-instrument pages). */
:root {
  color-scheme: light;
  --field: #C2D2CD;
  --card: #FCFCF7;
  --ink: #17263D;
  --mut: #48605B;
  --line: #D2DED9;
  --cardline: #E0E4DB;
  --accent: #3E5C7E;
  --stamp: #AD4A2C;
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, Roboto, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}
html { background: var(--field); }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background:
    linear-gradient(90deg, transparent 0 7.5%, color-mix(in srgb, var(--ink) 5%, transparent) 7.5% calc(7.5% + 1px), transparent calc(7.5% + 1px)),
    var(--field);
}
a { color: var(--accent); text-decoration: underline; text-underline-offset: 0.2em; }
.site-bar { width: min(64rem, calc(100% - 2.5rem)); min-height: 4.5rem; margin: 0 auto; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.axis-mark { position: relative; display: block; width: 2.65rem; height: 1.25rem; flex: 0 0 auto; color: var(--accent); }
.axis-mark::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 2px; background: currentColor; transform: translateY(-50%); }
.axis-mark::after { content: ""; position: absolute; left: 50%; top: 1px; bottom: 1px; width: 1px; background: var(--ink); transform: translateX(-50%); }
.axis-mark span { position: absolute; left: 50%; top: 50%; width: 8px; height: 8px; border: 2px solid var(--field); border-radius: 50%; background: var(--accent); transform: translate(-50%, -50%); }
.axis-mark:hover { color: var(--ink); }
.axis-mark:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.site-nav { display: flex; gap: 1.25rem; font-size: 0.8rem; }
.site-nav a { color: var(--ink); }
.site-nav a:hover { color: var(--accent); }
main { max-width: 56rem; margin: 0 auto; padding: 4rem 1.25rem 4rem; display: flex; flex-direction: column; gap: 2rem; }
.eyebrow { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink); font-weight: 600; }
.issue-number { display: inline-block; padding: 0.12em 0.28em; border: 1px solid var(--cardline); border-radius: 4px; background: var(--card); color: var(--stamp); box-shadow: 0 1px 2px rgba(0,0,0,0.06); }
header.measure h1 { font-family: var(--serif); font-size: clamp(2.1rem, 6.5vw, 3.4rem); line-height: 0.98; font-weight: 600; text-wrap: balance; margin: 0.7rem 0 0; letter-spacing: -0.025em; }
header.measure p.standfirst { margin-top: 0.7rem; color: var(--ink); font-size: 1.02rem; max-width: 34rem; }
.card { background: var(--card); border: 1px solid var(--cardline); border-radius: 8px; padding: 1.6rem; box-shadow: 0 1px 2px rgba(0,0,0,0.06); }
.privacy-note { border-left: 3px solid var(--accent); background: color-mix(in srgb, var(--accent) 7%, var(--card)); font-size: 0.85rem; color: var(--mut); padding: 0.65rem 0.9rem; border-radius: 0 6px 6px 0; margin: 0 0 1.2rem; }
.privacy-note strong { color: var(--ink); }
.intro-copy { color: var(--mut); font-size: 0.95rem; margin: 0 0 1.4rem; }
button.primary { font: inherit; font-weight: 600; background: var(--accent); color: #FFFFFF; border: none; border-radius: 6px; padding: 0.7rem 1.4rem; cursor: pointer; }
button.primary:hover { filter: brightness(0.92); }
#btn-start { display: block; margin-left: auto; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.ghost { font: inherit; background: none; border: none; color: var(--mut); cursor: pointer; padding: 0.4rem 0; font-size: 0.85rem; }
button.ghost:hover { color: var(--ink); }
.progress-track { height: 3px; background: var(--line); overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); transition: width 200ms ease; }
@media (prefers-reduced-motion: reduce) { .progress-fill { transition: none; } .likert label { transition: none; } }
.quiz-count { font-family: var(--mono); font-size: 0.75rem; color: var(--mut); margin-top: 0.55rem; }
.response-prompt { margin: 1.2rem 0 0; color: var(--mut); font-size: 0.85rem; }
.item-stem { display: block; width: 100%; font-family: var(--serif); font-size: clamp(1.25rem, 3.6vw, 1.6rem); line-height: 1.3; text-wrap: balance; margin: 1.2rem 0 1.4rem; padding: 0.9rem 0 1rem; border-bottom: 1px solid var(--ink); }
.rating-fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
#screen-quiz { width: 100%; max-width: 43rem; align-self: center; }
.likert { display: grid; grid-template-columns: 1fr; gap: 0.65rem; }
.likert input { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.likert label { display: flex; min-width: 0; min-height: 3.2rem; align-items: center; gap: 0.9rem; padding: 0.7rem 0.95rem; text-align: left; background: var(--card); border: 1px solid var(--cardline); border-radius: 6px; cursor: pointer; color: var(--ink); font-size: 0.9rem; line-height: 1.32; transition: border-color 120ms ease, background 120ms ease; }
.likert label:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, var(--card)); }
.likert .key { font-family: var(--mono); font-size: 0.75rem; color: var(--mut); border: 1px solid var(--cardline); border-radius: 50%; width: 1.8rem; height: 1.8rem; display: grid; place-items: center; flex: none; }
.likert label:hover .key { color: var(--accent); border-color: var(--accent); }
.likert input:checked + label { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, var(--card)); }
.likert input:checked + label .key { color: #FFFFFF; border-color: var(--accent); background: var(--accent); }
.likert input:focus-visible + label { position: relative; z-index: 2; outline: 2px solid var(--accent); outline-offset: -2px; }
.option-label { text-wrap: pretty; }
.quiz-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 1.3rem; }
.kbd-hint { font-size: 0.78rem; color: var(--mut); }
#screen-results { display: flex; flex-direction: column; gap: 2rem; }
.results-heading h2 { margin: 0.3rem 0 0.35rem; font: 600 clamp(2.1rem, 6vw, 3.4rem)/1 var(--serif); letter-spacing: -0.025em; }
.results-heading p { margin: 0; color: var(--ink); font-size: 0.85rem; max-width: 44rem; }
.result-kicker { color: var(--mut); font: 700 0.66rem/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; }
.measure-card h3 { margin: 0.45rem 0 0.1rem; font: 600 clamp(1.25rem, 2.6vw, 1.6rem)/1.1 var(--serif); letter-spacing: -0.01em; }
.measure-card .measures-line { margin: 0.15rem 0 0; color: var(--mut); font-size: 0.78rem; }
.score-line { margin: 0.9rem 0 0.15rem; font: 600 1.6rem/1 var(--serif); }
.score-line .score-scale-max { color: var(--mut); font: 400 0.85rem/1 var(--sans); }
.score-context { color: var(--mut); font: 0.72rem/1.4 var(--sans); margin: 0.15rem 0 0; }
.score-axis { position: relative; height: 0.95rem; margin: 0.8rem 0 0.2rem; }
.score-axis::after { position: absolute; z-index: 1; top: 0.48rem; right: 0; left: 0; height: 1px; background: var(--line); content: ""; }
.score-band { position: absolute; z-index: 2; top: 0.38rem; height: 0.22rem; border-radius: 999px; background: color-mix(in srgb, var(--accent) 32%, var(--card)); }
.score-marker { position: absolute; z-index: 4; top: 0.49rem; width: 0.56rem; height: 0.56rem; border: 2px solid var(--card); border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 1px var(--accent); transform: translate(-50%, -50%); }
.score-range-labels { display: flex; justify-content: space-between; font: 0.58rem/1 var(--mono); color: var(--mut); }
.honest-note { margin: 0.7rem 0 0; padding-top: 0.6rem; border-top: 1px solid var(--cardline); color: var(--mut); font-size: 0.74rem; }
.copy-card h2 { font-family: var(--serif); font-size: 1.45rem; font-weight: 600; margin: 0.3rem 0 0; }
.copy-card p.lede { color: var(--mut); font-size: 0.9rem; margin: 0.5rem 0 1rem; }
.copy-card textarea { width: 100%; font-family: var(--mono); font-size: 0.76rem; line-height: 1.55; color: var(--mut); background: var(--card); border: 1px solid var(--cardline); border-radius: 6px; padding: 0.9rem; height: 13rem; resize: vertical; }
.copy-toggle { display: inline-grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: min(100%, 27rem); margin-top: 1rem; border: 1px solid var(--cardline); border-radius: 6px; overflow: hidden; }
.copy-toggle button { min-height: 2.7rem; padding: 0.55rem 0.8rem; border: 0; border-right: 1px solid var(--cardline); background: var(--card); color: var(--mut); cursor: pointer; font: 600 0.78rem/1.2 var(--sans); }
.copy-toggle button:last-child { border-right: 0; }
.copy-toggle button[aria-selected="true"] { background: var(--accent); color: #FFFFFF; }
.copy-toggle button:focus-visible { position: relative; z-index: 2; outline: 2px solid var(--accent); outline-offset: 2px; }
.handoff-actions { display: flex; gap: 1rem; align-items: center; margin-top: 0.9rem; flex-wrap: wrap; }
.copied-note { font-size: 0.85rem; color: var(--accent); font-weight: 500; }
.results-actions { text-align: center; }
.results-actions button.ghost { color: var(--ink); }
footer { font-size: 0.78rem; color: var(--ink); line-height: 1.65; border-top: 1px solid var(--line); padding-top: 1.4rem; }
footer a { color: var(--ink); }
.version-stamp { display: inline-block; margin-top: 0.45rem; padding: 0.18rem 0.35rem; border: 1px solid var(--cardline); border-radius: 4px; background: var(--card); color: var(--mut); font-family: var(--mono); letter-spacing: 0.06em; box-shadow: 0 1px 2px rgba(0,0,0,0.06); }
.form-serial { color: var(--stamp); }
@media (max-width: 520px) {
  .site-bar { width: calc(100% - 1.5rem); }
  main { padding-top: 3rem; }
  .card { padding: 1.2rem; }
  .handoff-actions { align-items: flex-start; flex-direction: column; }
}