:root {
  color-scheme: dark;
  --bg: #1b2024;
  --surface: #232a2f;
  --surface-2: #2d353b;
  --face: #151a1d;
  --text: #ece8de;
  --text-mute: #aaa69c;
  --rule: #414a52;
  --rule-soft: #252c31;
  --edge: #6e7881;
  --brass: #c9a765;
  --brass-deep: #8a6f38;
  --screw: #4a5259;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --gap: clamp(72px, 9vw, 128px);
  --pad: clamp(20px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; background: var(--bg); }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 17px/1.62 var(--serif);
  background-image: linear-gradient(var(--rule-soft) 1px, transparent 1px);
  background-size: 100% 38px; background-attachment: fixed;
}

h1, h2, h3, .eyebrow, .brand-name, button, label, th, dt { font-family: var(--sans); }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.015em; margin: 0 0 .6em; text-wrap: balance; }
h1 { font-size: clamp(30px, 3.5vw, 45px); line-height: 1.12; letter-spacing: -0.028em; }
h2 { font-size: clamp(22px, 2.3vw, 29px); line-height: 1.2; }
h3 { font-size: clamp(19px, 1.7vw, 22px); line-height: 1.25; }
p { margin: 0 0 1.05em; }

a { color: var(--text); text-decoration-color: var(--brass); text-underline-offset: 3px; }
a:hover { color: var(--brass); }

:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap;
}

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 20; background: var(--text); color: var(--bg);
  padding: 10px 16px; font: 600 13px/1 var(--mono); text-decoration: none; transition: top .15s;
}
.skip:focus { top: 12px; color: var(--bg); }

.wrap { width: 100%; max-width: 1180px; margin-inline: auto; padding-inline: var(--pad); }

.eyebrow {
  font: 600 11px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase;
  color: var(--brass); margin: 0 0 18px;
}

.masthead { border-bottom: 1px solid var(--rule); background: var(--bg); position: relative; z-index: 10; }
.mast-in { display: flex; align-items: center; gap: 16px; min-height: 62px; flex-wrap: wrap; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; margin-right: auto; }
.brand-mark { width: 26px; height: 26px; fill: none; stroke: var(--text); stroke-width: 1.4; }
.brand-mark .fill { fill: var(--brass); stroke: none; }
.brand-name { font-weight: 600; font-size: 16px; letter-spacing: .04em; text-transform: uppercase; }

.nav-toggle {
  display: none; align-items: center; gap: 8px; background: none; border: 1px solid var(--edge);
  color: var(--text); font: 600 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  padding: 9px 12px; cursor: pointer;
}
.nav-toggle svg { width: 18px; height: 18px; stroke: currentColor; stroke-width: 1.6; fill: none; }
.nav-toggle[aria-expanded="true"] { background: var(--text); color: var(--bg); border-color: var(--text); }

#primary-nav ul { display: flex; gap: 26px; list-style: none; margin: 0; padding: 0; }
#primary-nav a {
  font: 500 13px/1 var(--sans); letter-spacing: .04em; text-decoration: none; padding: 6px 0;
  border-bottom: 1px solid transparent; display: block;
}
#primary-nav a:hover { border-bottom-color: var(--brass); }

.console {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  column-gap: clamp(32px, 4.5vw, 64px); row-gap: 34px; align-items: start;
  padding-block: clamp(36px, 5vw, 62px) var(--gap);
}
.hero-text { grid-column: 1; grid-row: 1; }
.controls { grid-column: 1; grid-row: 2; }
.instrument { grid-column: 2; grid-row: 1 / span 2; }

.stand { font-size: clamp(16px, 1.35vw, 18.5px); color: var(--text-mute); max-width: 52ch; margin-bottom: 0; }

.controls {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0 26px;
  border-top: 2px solid var(--text); padding-top: 18px; margin: 0;
}
.field { display: grid; grid-template-columns: 1fr auto; align-items: center; padding: 11px 0;
         border-bottom: 1px solid var(--edge); column-gap: 10px; }
.field:focus-within { border-bottom-color: var(--brass); }
.field:focus-within label { color: var(--brass); }
.field label {
  grid-column: 1 / -1; font: 600 10.5px/1 var(--mono); letter-spacing: .15em;
  text-transform: uppercase; color: var(--text-mute); margin-bottom: 7px;
}
.field input, .field select {
  font: 500 19px/1.2 var(--mono); color: var(--text); background: transparent;
  border: 0; padding: 2px 0; width: 100%; min-width: 0;
}
.field select { font-size: 15px; background-color: var(--bg); }
.field select option { background: var(--surface); color: var(--text); }
.field .unit { font: 500 12px/1 var(--mono); color: var(--brass); letter-spacing: .1em; }
.field-note {
  grid-column: 1 / -1; margin: 14px 0 0; font: 400 13px/1.5 var(--sans); color: var(--text-mute);
}

.panel {
  margin: 0; background: var(--surface); color: var(--text); padding: 22px 22px 16px;
  border: 1px solid var(--rule); position: relative;
  background-image:
    radial-gradient(circle at 11px 11px, var(--screw) 0 3px, transparent 3.4px),
    radial-gradient(circle at calc(100% - 11px) 11px, var(--screw) 0 3px, transparent 3.4px),
    radial-gradient(circle at 11px calc(100% - 11px), var(--screw) 0 3px, transparent 3.4px),
    radial-gradient(circle at calc(100% - 11px) calc(100% - 11px), var(--screw) 0 3px, transparent 3.4px);
  background-repeat: no-repeat;
}
.dial { display: block; width: 100%; max-width: 268px; margin: 2px auto 0; }
.d-face { fill: var(--face); stroke: var(--surface-2); stroke-width: 1; }
.d-ring { fill: none; stroke: var(--brass-deep); stroke-opacity: .55; stroke-width: 1; }
.d-minor { fill: none; stroke: var(--text-mute); stroke-width: 6; stroke-dasharray: 0.32 0.68; }
.d-major { fill: none; stroke: var(--text); stroke-width: 16; stroke-dasharray: 0.5 4.5; }
.d-num { fill: var(--text-mute); font: 500 10px/1 var(--mono); text-anchor: middle; }
.d-std path { fill: var(--brass); }
.d-cap-txt { fill: var(--brass); font: 600 9px/1 var(--mono); letter-spacing: .22em; text-anchor: middle; }
.set-hand path { fill: none; stroke: var(--brass); stroke-width: 2.2; stroke-linecap: square; }
.needle path { fill: var(--text); }
.d-hub { fill: var(--surface); stroke: var(--text-mute); stroke-width: 1; }
.d-pin { fill: var(--brass); }
.needle, .set-hand { transition: transform .5s cubic-bezier(.22,.9,.3,1); }

.dial-cap {
  margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--rule);
  font: 400 11.5px/1.4 var(--mono); color: var(--text-mute); display: flex; align-items: center; gap: 8px;
  text-wrap: pretty;
}
.brass-key { width: 14px; height: 2px; background: var(--brass); flex: none; }

.readout { border: 1px solid var(--rule); border-top: 0; padding: 20px 22px 22px; background: var(--surface); }
.ro-delta { font: 500 clamp(34px, 4vw, 48px)/1 var(--mono); letter-spacing: -.02em; margin: 0 0 6px; }
.ro-unit { font-size: 14px; letter-spacing: .08em; color: var(--text-mute); }
.ro-band {
  font: 600 12px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase;
  color: var(--brass); margin: 0 0 14px;
}
.ro-note { margin: 0 0 10px; font-size: 15.5px; line-height: 1.55; }
.ro-wind { margin: 0; font: 400 13.5px/1.5 var(--sans); color: var(--text-mute); }
.readout p, .glance dd { text-wrap: pretty; }

.strip { background: var(--surface); color: var(--text); border-block: 1px solid var(--rule); }
.strip-in {
  display: grid; grid-template-columns: repeat(6, 1fr); margin-block: 0;
  padding-block: 26px; gap: 0;
}
.strip-in > div { padding: 2px 18px; border-left: 1px solid var(--rule); }
.strip-in > div:first-child { border-left: 0; padding-left: 0; }
.strip dt { font: 500 clamp(19px, 2vw, 25px)/1.1 var(--mono); color: var(--text); letter-spacing: -.01em; }
.strip dd { margin: 8px 0 0; font: 400 12px/1.45 var(--sans); color: var(--text-mute); }

.band { padding-block: var(--gap); border-bottom: 1px solid var(--rule); }
#sources { border-bottom: 0; }
.two-col { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(28px, 4vw, 60px); }
.two-col p { max-width: 62ch; }

.spec { border-collapse: collapse; width: 100%; align-self: start; }
.spec th, .spec td { text-align: left; padding: 13px 10px 13px 0; border-bottom: 1px solid var(--rule); }
.spec thead th {
  font: 600 10.5px/1 var(--mono); letter-spacing: .15em; text-transform: uppercase;
  color: var(--text-mute); border-bottom: 2px solid var(--text); padding-bottom: 10px;
}
.spec tbody th { font: 500 14px/1.3 var(--mono); white-space: nowrap; }
.spec tbody td { font-size: 15px; color: var(--text-mute); }
.spec tbody tr:hover th, .spec tbody tr:hover td { background: var(--surface); }

.tabs { border-top: 2px solid var(--text); }
.tablist { display: flex; flex-wrap: nowrap; gap: 0; }
.tablist[hidden] { display: none; }
.tablist button {
  font: 600 12.5px/1 var(--sans); letter-spacing: .06em; background: transparent; cursor: pointer;
  border: 0; border-bottom: 3px solid transparent; color: var(--text-mute); white-space: nowrap;
  padding: 16px 26px 14px 0; margin-right: 8px; display: inline-flex; align-items: baseline; gap: 9px;
}
.tablist button:hover { color: var(--text); }
.tablist button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--brass); }
.t-num { font: 500 11px/1 var(--mono); color: var(--brass); letter-spacing: .1em; }

.prose {
  padding-top: 30px; display: grid; align-items: start; column-gap: 40px;
  grid-template-columns: minmax(0, 68ch) minmax(0, 330px); justify-content: space-between;
}
.prose[hidden] { display: none; }
.prose > * { grid-column: 1; }
.prose > .glance { grid-column: 2; grid-row: 1 / span 6; }
.prose h3 { margin-bottom: .75em; }
.prose p { font-size: 17.5px; }
.prose em { font-style: italic; color: var(--text); }
.prose:focus-visible { outline-offset: 6px; }

.glance { background: var(--surface); border: 1px solid var(--rule); padding: 18px 20px 6px; margin-top: 4px; }
.glance .glance-h {
  font: 600 10.5px/1 var(--mono); letter-spacing: .15em; text-transform: uppercase;
  color: var(--text-mute); margin: 0 0 4px;
}
.glance dl { margin: 0; }
.glance dl > div { padding: 13px 0; border-bottom: 1px solid var(--rule); }
.glance dl > div:last-child { border-bottom: 0; }
.glance dt { font: 500 18px/1.2 var(--mono); color: var(--brass); letter-spacing: -.01em; }
.glance dd { margin: 5px 0 0; font: 400 14px/1.45 var(--sans); color: var(--text-mute); }

.src {
  list-style: none; margin: 0 0 24px; padding: 0; border-top: 2px solid var(--text);
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: clamp(24px, 3vw, 44px);
}
.src li {
  padding: 16px 0 18px; border-bottom: 1px solid var(--rule); font-size: 15.5px; line-height: 1.5;
  text-wrap: pretty;
}
.fineprint { font: 400 13.5px/1.55 var(--sans); color: var(--text-mute); margin: 0; max-width: 80ch; }

.site-foot { background: var(--surface); color: var(--text); border-top: 1px solid var(--rule); }
.foot-in { display: grid; gap: 18px; padding-block: 44px 52px; }
.foot-brand {
  margin: 0; font: 600 14px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--text);
}
.foot-brand span { color: var(--brass); }
.site-foot nav ul { display: flex; flex-wrap: wrap; gap: 8px 26px; list-style: none; margin: 0; padding: 0; }
.site-foot a { color: var(--text-mute); text-decoration: none; font: 400 14px/1.4 var(--sans); }
.site-foot a:hover { color: var(--brass); text-decoration: underline; text-underline-offset: 4px; }
.foot-note {
  margin: 0; padding-top: 18px; border-top: 1px solid var(--rule);
  font: 400 12.5px/1.5 var(--mono); color: var(--text-mute);
}

@media (max-width: 1000px) {
  .strip-in { grid-template-columns: repeat(3, 1fr); row-gap: 24px; }
  .strip-in > div:nth-child(3n + 1) { border-left: 0; padding-left: 0; }
  .prose { display: block; max-width: 68ch; }
  .prose > .glance { margin-top: 28px; }
}

@media (max-width: 880px) {
  .console { grid-template-columns: 1fr; }
  .hero-text, .controls, .instrument { grid-column: 1; grid-row: auto; }
  .instrument { max-width: 460px; }
  .two-col { grid-template-columns: 1fr; }
  .src { grid-template-columns: 1fr; border-top-width: 1px; }
  .src li { padding: 13px 0; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  #primary-nav { flex-basis: 100%; display: none; }
  #primary-nav.open { display: block; }
  #primary-nav ul { flex-direction: column; gap: 0; padding-bottom: 10px; }
  #primary-nav a { padding: 13px 0; border-top: 1px solid var(--rule); border-bottom: 0; }
  #primary-nav li:first-child a { border-top: 0; }
  #primary-nav a:hover { border-bottom-color: transparent; color: var(--brass); }
}

@media (max-width: 620px) {

  .tablist { overflow-x: auto; padding-block: 6px; }
  .tablist button {
    font-size: 11.5px; letter-spacing: .03em; gap: 6px;
    padding: 12px 14px 10px 0; margin-right: 0; flex: none;
  }
  .t-num { font-size: 10px; letter-spacing: .06em; }
}

@media (max-width: 560px) {
  body { font-size: 16.5px; background-size: 100% 34px; }
  .controls { grid-template-columns: 1fr; }
  .strip-in { grid-template-columns: repeat(2, 1fr); }
  .strip-in > div { padding-inline: 14px; }
  .strip-in > div:nth-child(3n + 1) { border-left: 1px solid var(--rule); padding-left: 14px; }
  .strip-in > div:nth-child(2n + 1) { border-left: 0; padding-left: 0; }
  .prose p { font-size: 16.5px; }
  .readout { padding: 18px 16px 20px; }
  .panel { padding: 18px 16px 14px; }
  .instrument { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

@media (forced-colors: active) {
  .needle path, .d-major, .d-minor { stroke: CanvasText; fill: CanvasText; }
  .tablist button[aria-selected="true"] { border-bottom-color: Highlight; }
}