/* Mute Spectrum — engine test bench
   One stylesheet. No web fonts, no external requests, no animation. */

:root {
  --bg: #eef3f7;
  --text: #182a38;
  --accent: #2f6db3;
  --accent-2: #d8a021;
  --card: #ffffff;
  --muted: #3d5468;
  --display: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --body: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--bg);
  /* measurement grid: page background only, 48px pitch, 1px accent at 5% */
  background-image:
    linear-gradient(to right, rgba(47, 109, 179, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(47, 109, 179, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--text);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
}

.wrap {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- skip link ---------- */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--accent);
  padding: 8px 12px;
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 13px;
  z-index: 50;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- header ---------- */

.bench-head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--card);
  border-bottom: 1px solid var(--accent);
}

.head-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.brand {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 1px;
}

.menu-toggle {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 13px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 6px 10px;
  cursor: pointer;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover,
.site-nav a:focus { border-bottom-color: var(--accent); }

@media (max-width: 620px) {
  .site-nav { display: none; width: 100%; }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; gap: 0; border-top: 1px solid var(--accent); }
  .site-nav li { border-bottom: 1px solid rgba(47, 109, 179, 0.3); }
  .site-nav a { display: block; padding: 10px 2px; }
}
@media (min-width: 621px) {
  .menu-toggle { display: none; }
}

/* ---------- bench cards ---------- */

main { display: block; padding: 28px 0 8px; }

.bench {
  position: relative;
  background: var(--card);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 26px 22px 22px;
  margin: 0 0 22px;
}

.bench-id {
  position: absolute;
  top: 6px;
  right: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ---------- type ---------- */

h1, h2, h3 {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.3;
  color: var(--text);
}

h1 { font-size: 25px; margin: 0 0 14px; }
h2 { font-size: 18px; margin: 30px 0 10px; }
h3 { font-size: 15px; margin: 22px 0 8px; }
.bench > h2:first-of-type { margin-top: 0; }

p { margin: 0 0 14px; }

a { color: var(--accent); }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

strong { font-weight: 700; }

.lede { font-size: 18px; }

/* ---------- reading strip (step pages) ---------- */

.readings {
  display: flex;
  flex-wrap: wrap;
  border: 1px solid var(--accent);
  border-radius: 2px;
  margin: 0 0 18px;
}

.readings div {
  flex: 1 1 33%;
  min-width: 120px;
  padding: 8px 10px;
  border-right: 1px solid var(--accent);
}
.readings div:last-child { border-right: 0; }

.readings dt,
.readings .rk {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 10px;
  color: var(--muted);
  display: block;
}

.readings .rv {
  font-family: var(--mono);
  font-size: 15px;
  display: block;
}

.step-of {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 8px;
}

/* ---------- hero ---------- */

.hero-arc { display: block; margin: 0 0 14px; }

/* ---------- disclosure box ---------- */

.disclosure {
  border: 1px solid var(--accent);
  border-left-width: 4px;
  border-radius: 2px;
  padding: 14px 16px;
  margin: 18px 0;
  background: var(--card);
  font-size: 17px;
}

.disclosure .dl-label {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 12px;
  display: block;
  margin-bottom: 6px;
}

/* ---------- affiliate link row ---------- */

.aff {
  border-top: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  padding: 12px 0;
  margin: 18px 0;
}

.aff-link {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 14px;
  display: inline-block;
}

.aff-note {
  display: block;
  font-size: 14px;
  color: var(--muted);
  margin-top: 4px;
}

/* ---------- callout ---------- */

.callout {
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 16px 18px;
  margin: 20px 0;
  position: relative;
}

.callout h3 { margin-top: 0; }

/* the single HOLD tag, one per site */
.hold-tag {
  display: inline-block;
  transform: rotate(-45deg);
  background: var(--accent-2);
  color: #1b1403;
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: 0.14em;
  padding: 3px 8px;
  border-radius: 2px;
  margin-bottom: 10px;
}

/* ---------- lists, checklists ---------- */

ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin: 0 0 8px; }

.checklist { list-style: none; padding-left: 0; }

.checklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border-bottom: 1px solid rgba(47, 109, 179, 0.3);
  padding: 8px 0;
  margin: 0;
}

.checklist li::before {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  border: 1px solid var(--accent);
  border-radius: 2px;
}

.steps-list { padding-left: 0; list-style: none; counter-reset: s; }
.steps-list > li {
  counter-increment: s;
  border-top: 1px solid var(--accent);
  padding: 12px 0 12px 44px;
  position: relative;
  margin: 0;
}
.steps-list > li::before {
  content: "0" counter(s);
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--accent);
}
.steps-list > li:last-child { border-bottom: 1px solid var(--accent); }
.steps-list a {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 14px;
  letter-spacing: 0.04em;
}

/* ---------- tables ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 0 0 16px;
}
caption {
  text-align: left;
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding-bottom: 6px;
}
th, td {
  border: 1px solid var(--accent);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
th {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* ---------- glossary strip ---------- */

.glossary { margin: 0 0 14px; }
.glossary dt {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.06em;
  border-top: 1px solid var(--accent);
  padding-top: 8px;
  margin-top: 8px;
}
.glossary dd { margin: 4px 0 0; }

/* definition list used by the cookie policy */
.checked dt {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.06em;
  border-top: 1px solid var(--accent);
  padding-top: 8px;
  margin-top: 10px;
}
.checked dd { margin: 4px 0 0; }

/* ---------- in-page contents ---------- */

.contents {
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 12px 16px;
  margin: 0 0 22px;
}
.contents h2 {
  font-size: 12px;
  letter-spacing: 0.12em;
  margin: 0 0 6px;
  color: var(--muted);
}
.contents ol { margin: 0; padding-left: 20px; font-size: 15px; }
.contents li { margin: 0 0 4px; }

/* ---------- step navigation ---------- */

.stepnav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  border-top: 1px solid var(--accent);
  padding-top: 14px;
  margin-top: 24px;
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ---------- print button ---------- */

.print-btn {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 13px;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 8px 12px;
  cursor: pointer;
}

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--accent);
  background: var(--card);
  margin-top: 30px;
  padding: 22px 0 40px;
}

.foot-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 16px;
  font-size: 14px;
  color: var(--text);
}

.pub {
  font-style: normal;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  margin: 0 0 12px;
}
.pub-name {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}

.foot-links { margin: 0 0 12px; }
.foot-links a { margin-right: 4px; }

.tm, .reviewed { margin: 0 0 10px; color: var(--muted); }
.reviewed { font-family: var(--mono); font-size: 13px; }

/* ---------- print ---------- */

@media print {
  body {
    background: #fff;
    background-image: none;
    color: #000;
    font-size: 11.5pt;
  }
  .bench-head,
  .site-nav,
  .menu-toggle,
  .skip,
  .print-btn,
  .stepnav,
  .aff { display: none !important; }
  .bench {
    border: 1px solid #000;
    page-break-inside: avoid;
    margin-bottom: 14pt;
  }
  .bench-id { color: #000; }
  a { color: #000; text-decoration: underline; }
  .checklist li { border-bottom: 1px solid #999; }
  .checklist li::before { border: 1px solid #000; }
  .site-foot { border-top: 1px solid #000; }
  .wrap { max-width: none; padding: 0; }
}