/* Vintage synthesizer chassis — warm cream panels, brushed metal, glowing LEDs. */
:root {
  --chassis: #2b2622;
  --chassis-2: #201c19;
  --panel: #d9cbb0;
  --panel-edge: #b7a684;
  --ink: #33291d;
  --ink-soft: #6b5c46;
  --led: #ff5a3c;
  --led-glow: #ff8a5a;
  --accent: #d98a2b;
  --key: #efe6d2;
  --key-edge: #b8ab8f;
  --metal: linear-gradient(180deg, #e8e2d4, #b7ad96 55%, #cfc6b0);
  font-family: "Futura", "Century Gothic", "Avenir", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(120% 100% at 50% 0%, #3a332c 0%, var(--chassis) 45%, var(--chassis-2) 100%);
  color: var(--ink);
}

/* --- chassis frame --- */
.chassis-header, .chassis-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.6rem;
  color: var(--panel);
}
.brand {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 0.35em;
  color: var(--accent);
  text-shadow: 0 1px 2px #000;
}
.model, .serial { font-size: 0.7rem; letter-spacing: 0.25em; color: #9c8f78; }

.chassis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.1rem;
  padding: 0.5rem 1.6rem 1.6rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* --- panels --- */
.panel {
  background:
    linear-gradient(180deg, #e6dcc6, var(--panel) 30%, #cdbd9e);
  border: 1px solid var(--panel-edge);
  border-radius: 10px;
  padding: 0.9rem 1rem 1.1rem;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.6),
    inset 0 -2px 6px rgba(120, 100, 70, 0.35),
    0 6px 14px rgba(0,0,0,0.4);
}
.panel-title {
  margin: 0 0 0.8rem;
  font-size: 0.82rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 2px solid var(--panel-edge);
  padding-bottom: 0.4rem;
}
.panel-body { display: flex; flex-direction: column; gap: 0.85rem; }
.sub { display: flex; flex-direction: column; gap: 0.4rem; }
.labeled { display: flex; flex-direction: column; gap: 0.35rem; }
.group-caption {
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* --- switches --- */
.switch-row, .binary-group, .rotary-row { display: flex; gap: 0.7rem; flex-wrap: wrap; }
.switch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  width: 3.1rem;
}
.switch .led {
  width: 10px; height: 10px; border-radius: 50%;
  background: #6b3a30;
  box-shadow: inset 0 0 2px #000;
  transition: background 0.1s, box-shadow 0.1s;
}
.switch.on .led {
  background: var(--led);
  box-shadow: 0 0 8px var(--led-glow), 0 0 2px #fff;
}
.switch .toggle {
  width: 2.4rem; height: 1.5rem;
  border-radius: 4px;
  border: 1px solid #7c6c50;
  background: var(--metal);
  cursor: pointer;
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7), 0 2px 3px rgba(0,0,0,0.3);
}
.switch .toggle::after {
  content: "";
  position: absolute;
  left: 3px; right: 3px; top: 3px;
  height: 0.55rem;
  border-radius: 3px;
  background: linear-gradient(180deg, #57493a, #322a20);
  transition: transform 0.08s ease;
}
.switch.on .toggle::after { transform: translateY(0.5rem); background: linear-gradient(180deg,#6a5a45,#3a3125); }
.ctl-label { font-size: 0.6rem; letter-spacing: 0.12em; color: var(--ink-soft); text-transform: uppercase; }

/* --- momentary pads --- */
.pad-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.6rem; }
.pad-btn {
  width: 100%;
  font: inherit;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 0.7rem 0.2rem;
  border-radius: 6px;
  border: 1px solid #8a7a5c;
  background: var(--metal);
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7), 0 3px 4px rgba(0,0,0,0.3);
}
.pad.flash .pad-btn {
  background: linear-gradient(180deg, var(--led-glow), var(--accent));
  color: #fff;
  box-shadow: 0 0 12px var(--led-glow);
}

/* --- keys --- */
.key-row { display: grid; grid-template-columns: repeat(8, 1fr); gap: 0.35rem; }
.key {
  font: inherit;
  font-weight: 700;
  color: var(--ink);
  padding: 1.5rem 0 0.6rem;
  border-radius: 0 0 6px 6px;
  border: 1px solid var(--key-edge);
  background: linear-gradient(180deg, #fbf6ea, var(--key) 70%, #ddd1b6);
  cursor: pointer;
  box-shadow: inset 0 1px 0 #fff, 0 4px 5px rgba(0,0,0,0.3);
  transition: transform 0.05s, background 0.05s;
}
.key.held {
  transform: translateY(2px);
  background: linear-gradient(180deg, var(--accent), #b06f1e);
  color: #fff;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.4), 0 0 10px var(--led-glow);
}

/* --- rotaries --- */
.rotary { display: flex; flex-direction: column; align-items: center; gap: 0.35rem; width: 5rem; }
.knob {
  width: 3.4rem; height: 3.4rem; border-radius: 50%;
  background:
    radial-gradient(circle at 50% 35%, #6a5c48, #3a3226 70%),
    var(--chassis);
  border: 2px solid #241f18;
  position: relative;
  cursor: ns-resize;
  box-shadow: inset 0 2px 4px rgba(255,255,255,0.15), 0 4px 8px rgba(0,0,0,0.5);
  touch-action: none;
}
.knob-pointer {
  position: absolute;
  left: 50%; top: 6px;
  width: 3px; height: 34%;
  margin-left: -1.5px;
  border-radius: 2px;
  background: var(--led);
  box-shadow: 0 0 6px var(--led-glow);
}
.readout {
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  background: #1c1811;
  color: var(--led-glow);
  padding: 0.1rem 0.5rem;
  border-radius: 3px;
  min-width: 3rem;
  text-align: center;
  box-shadow: inset 0 1px 3px #000;
}

/* --- name readouts (LCD-style) --- */
.name-readout {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  text-transform: uppercase;
  color: #9effa0;
  background: #10160f;
  border: 1px solid #05330a;
  padding: 0.45rem 0.6rem;
  border-radius: 4px;
  text-align: center;
  box-shadow: inset 0 1px 4px #000, 0 0 6px rgba(60,255,120,0.15);
}