/* PS-3100 resonator demo - panel styling.
   Palette: PS-series charcoal panel, aged-white silkscreen, amber vactrol
   glow (the one bright thing on the page), cap-variant chip colors. */

:root {
  --room: #0b0b0d;
  --cabinet: #141416;
  --cabinet-edge: #2a2a2e;
  --panel: #1d1e21;
  --panel-lo: #17181a;
  --legend: #d8d3c6;
  --legend-dim: #8f8b81;
  --hairline: #55524a;
  --amber: #ffb648;
  --amber-deep: #7a4a10;
  --power-red: #e04c3a;
  --key-ivory: #efeade;
  --key-ivory-lo: #cfc9ba;
  --key-black: #1c1c1e;
  --scope-bg: #0d0f0c;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background:
    radial-gradient(120% 90% at 50% 0%, #17171b 0%, var(--room) 60%);
  min-height: 100vh;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--legend-dim);
  display: flex;
  justify-content: center;
}

.room {
  padding: 48px 16px 40px;
  max-width: 1040px;
  width: 100%;
  min-width: 0;   /* flex item: let the keybed scroll instead of widening the page */
}

/* ---------- cabinet + panel ---------- */

.unit {
  background: linear-gradient(180deg, var(--cabinet-edge), var(--cabinet) 6px, #0f0f11);
  border-radius: 10px;
  padding: 14px 14px 18px;
  box-shadow:
    0 30px 60px rgba(0,0,0,.65),
    0 2px 0 rgba(255,255,255,.04) inset;
}

.panel {
  background:
    linear-gradient(180deg, var(--panel) 0%, var(--panel-lo) 100%);
  border: 1px solid #000;
  border-radius: 4px;
  padding: 18px 22px 22px;
  box-shadow: 0 1px 0 rgba(255,255,255,.05) inset;
}

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

.panel-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.badge { display: flex; align-items: baseline; gap: 12px; white-space: nowrap; }

.badge-model {
  font-weight: 300;
  font-style: italic;
  font-size: 24px;
  letter-spacing: .04em;
  color: var(--legend);
}

.badge-sub {
  flex: 1;
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--legend-dim);
  align-self: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.power-block { display: flex; align-items: center; gap: 10px; }

/* ---------- silkscreen section boxes ---------- */

.panel-controls {
  display: flex;
  gap: 18px;
  align-items: stretch;
  flex-wrap: wrap;
}

.section {
  border: 1px solid var(--hairline);
  border-radius: 3px;
  padding: 14px 16px 12px;
  min-width: 0;
  min-inline-size: 0;   /* fieldset UA default is min-content */
}

.section legend {
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--legend);
  padding: 0 8px;
}

.section-resonator { flex: 2 1 380px; }
.section-mg        { flex: 0 0 auto; }
.section-variant   { flex: 0 0 auto; display: flex; flex-direction: column; }

/* ---------- scope + vactrol lamps ---------- */

.scope-wrap { position: relative; margin-bottom: 14px; }

.scope {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 96px;
  contain: size;        /* keep the 640px bitmap from setting min-content */
  background:
    linear-gradient(180deg, rgba(255,182,72,.05), rgba(0,0,0,0) 30%),
    var(--scope-bg);
  border: 1px solid #000;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(255,255,255,.04), 0 6px 14px rgba(0,0,0,.5) inset;
}

.lamps {
  position: absolute;
  top: 6px;
  right: 8px;
  display: flex;
  gap: 8px;
}

.glow-lamp {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--amber-deep);
  box-shadow: 0 0 0 1px #000;
  transition: none;
}

/* ---------- knobs ---------- */

.knob-row { display: flex; gap: 26px; justify-content: center; }

.knob-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
}

.knob {
  --angle: 0deg;
  width: 58px; height: 58px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, #3a3b3f 0%, #232427 42%, #121214 100%);
  box-shadow:
    0 0 0 1px #000,
    0 4px 8px rgba(0,0,0,.55),
    0 1px 0 rgba(255,255,255,.08) inset;
  position: relative;
  cursor: ns-resize;
  touch-action: none;
}

.knob::before {           /* skirt tick ring */
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 50%;
  background:
    repeating-conic-gradient(from -135deg,
      var(--legend-dim) 0deg 1.4deg, transparent 1.4deg 27deg)
    ;
  -webkit-mask: radial-gradient(circle, transparent 62%, #000 63%, #000 72%, transparent 73%);
          mask: radial-gradient(circle, transparent 62%, #000 63%, #000 72%, transparent 73%);
  opacity: .7;
  pointer-events: none;
}

.knob::after {            /* pointer line */
  content: "";
  position: absolute;
  left: 50%; top: 5px;
  width: 3px; height: 20px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: var(--legend);
  transform-origin: 50% 24px;
  transform: rotate(var(--angle));
}

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

.knob-small { width: 46px; height: 46px; }
.knob-small::after { height: 15px; transform-origin: 50% 18px; }

.legend-sm {
  font-size: 9px;
  letter-spacing: .2em;
  color: var(--legend);
  white-space: nowrap;
}

/* ---------- rockers, lamps ---------- */

.rocker {
  width: 34px; height: 20px;
  border: 1px solid #000;
  border-radius: 3px;
  background: #0e0e10;
  cursor: pointer;
  padding: 2px;
  display: inline-flex;
}

.rocker-cap {
  flex: 1;
  border-radius: 2px;
  background: linear-gradient(180deg, #3c3d41, #232427);
  transform: translateY(-1px);
  transition: transform .08s ease;
}

.rocker[aria-pressed="true"] .rocker-cap {
  background: linear-gradient(0deg, #3c3d41, #232427);
  transform: translateY(1px);
}

.rocker:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

.rocker-sm { width: 30px; height: 18px; }

.mg-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-top: 12px;
}

.lamp {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #3a1510;
  box-shadow: 0 0 0 1px #000;
}

.power-lamp.on {
  background: var(--power-red);
  box-shadow: 0 0 0 1px #000, 0 0 8px 1px rgba(224,76,58,.8);
}

/* ---------- cap-variant chips ---------- */

.chips { display: flex; flex-direction: column; gap: 6px; }

.chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid transparent;
  border-radius: 3px;
  padding: 3px 8px 3px 5px;
  font-family: inherit;
  font-size: 9px;
  letter-spacing: .18em;
  color: var(--legend-dim);
  cursor: pointer;
}

.chip i {
  width: 16px; height: 8px;         /* little film capacitor body */
  border-radius: 4px;
  background: currentColor;
  box-shadow: 0 0 0 1px rgba(0,0,0,.7);
}

.chip-yellow i { color: #e3c53a; }
.chip-green  i { color: #4f9e60; }
.chip-blue   i { color: #4a7fb5; }
.chip-gray   i { color: #97979b; }
.chip-white  i { color: #e8e5dc; }

.chip.selected {
  border-color: var(--hairline);
  color: var(--legend);
}

.chip:focus-visible { outline: 2px solid var(--amber); outline-offset: 1px; }

.chip-note {
  margin-top: auto;
  padding-top: 10px;
  font-size: 8px;
  letter-spacing: .12em;
  color: var(--legend-dim);
  text-align: center;
}

/* ---------- keybed ---------- */

.keybed {
  position: relative;
  display: flex;
  margin-top: 14px;
  background: #000;
  border-radius: 0 0 6px 6px;
  padding: 4px 4px 0;
  height: 132px;
  overflow-x: auto;
  overflow-y: hidden;
  user-select: none;
  -webkit-user-select: none;
}

.key {
  position: relative;
  flex: 1 0 24px;
  background: linear-gradient(180deg, var(--key-ivory) 88%, var(--key-ivory-lo));
  border: 1px solid #6d685c;
  border-radius: 0 0 3px 3px;
  cursor: pointer;
  touch-action: none;
}

.key.down {
  background: linear-gradient(180deg, #ddd7c8 90%, #b8b2a3);
  box-shadow: 0 3px 6px rgba(0,0,0,.35) inset;
}

.key.black {
  position: absolute;
  top: 4px;
  width: 16px;
  height: 78px;
  flex: none;
  background: linear-gradient(180deg, #303032 0%, var(--key-black) 20%, #000 100%);
  border: 1px solid #000;
  border-radius: 0 0 2px 2px;
  z-index: 2;
  box-shadow: 0 3px 0 rgba(0,0,0,.6);
}

.key.black.down {
  background: #111;
  height: 76px;
  box-shadow: none;
}

/* ---------- caption ---------- */

.caption {
  margin-top: 22px;
  text-align: center;
}

.caption p {
  font-size: 12.5px;
  line-height: 1.65;
  max-width: 620px;
  margin: 0 auto;
  color: var(--legend-dim);
}

.caption .cap { letter-spacing: .14em; font-size: 10.5px; color: var(--legend); }

.hub-link {
  color: var(--legend-dim);
  font-size: 11px;
  letter-spacing: .14em;
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

.hub-link:hover, .hub-link:focus-visible { color: var(--legend); outline: none; }

.caption kbd {
  font-family: inherit;
  font-size: 10.5px;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  padding: 0 4px;
  color: var(--legend);
}

@media (max-width: 760px) {
  .room { padding-top: 20px; }
  .panel-head { flex-wrap: wrap; }
  .badge-sub { order: 3; flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .rocker-cap { transition: none; }
}