:root {
  --bg-1: #fde941;
  --bg-2: #ffda2e;
  --pcb: #d67f1d;
  --pcb-deep: #ad6214;
  --ink: #102f40;
  --lcd: #09161a;
  --lcd-glow: #59f6c8;
  --acrylic: rgba(236, 248, 255, 0.25);
  --acrylic-border: rgba(255, 255, 255, 0.55);
}

html {
  height: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: "Trebuchet MS", "Avenir Next", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 12%, #fff8b8 0, transparent 28%),
    radial-gradient(circle at 92% 85%, #f7b62a 0, transparent 25%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
}

.stage {
  width: min(1100px, 100% - 2rem);
  min-height: 100dvh;
  margin: 0 auto;
  padding: 1rem 0 0.8rem;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.75rem;
  position: relative;
}

.hero {
  max-width: 820px;
}

.top-right-meta {
  position: absolute;
  top: 0.7rem;
  right: 0;
  z-index: 3;
}

.eyebrow {
  margin: 0;
  font-family: "Courier New", monospace;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  text-transform: uppercase;
}

h1 {
  margin: 0.25rem 0 0.6rem;
  font-size: clamp(1.9rem, 5vw, 3rem);
  letter-spacing: 0.02em;
}

.hero p {
  margin: 0;
  line-height: 1.45;
}

.board {
  position: relative;
  margin-top: 0;
  padding: 1.4rem 1.2rem 1rem;
  border-radius: 1.1rem;
  background:
    linear-gradient(155deg, #ea962e 0%, var(--pcb) 42%, var(--pcb-deep) 100%);
  box-shadow:
    0 14px 28px rgba(120, 63, 8, 0.38),
    inset 0 1px 0 rgba(255, 214, 152, 0.8);
  overflow: hidden;
  min-height: 0;
}

.acrylic {
  pointer-events: none;
  position: absolute;
  inset: 0.4rem;
  border-radius: 0.8rem;
  border: 2px solid var(--acrylic-border);
  background: linear-gradient(165deg, var(--acrylic) 0%, transparent 55%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.ports {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.8rem;
  margin: 0 0.3rem 1rem;
}

.port {
  justify-self: center;
  position: relative;
}

.din {
  width: 60px;
  height: 60px;
  border-radius: 10px;
  background: linear-gradient(165deg, #1e2d38, #050b12);
  box-shadow: inset 0 0 0 2px rgba(152, 184, 209, 0.2), 0 5px 12px rgba(0, 0, 0, 0.35);
}

.din::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: radial-gradient(circle, #0f1f2e 0, #01070c 70%);
}

.xiao {
  width: 82px;
  height: 30px;
  border-radius: 6px;
  background:
    repeating-linear-gradient(90deg, #0f1418 0 5px, #2f373f 5px 8px),
    #1f262c;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.3);
}

.program-panel {
  display: grid;
  grid-template-columns: auto minmax(230px, 320px) 1fr;
  align-items: center;
  gap: 0.6rem;
  margin: 0.2rem 0.15rem 1rem;
  position: relative;
  z-index: 1;
}

.program-panel label {
  font-family: "Courier New", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

#program-select {
  appearance: none;
  width: 100%;
  padding: 0.45rem 0.6rem;
  border-radius: 0.4rem;
  border: 1px solid rgba(188, 230, 255, 0.8);
  background:
    linear-gradient(180deg, rgba(11, 28, 38, 0.92), rgba(7, 18, 27, 0.95));
  color: #d9f8ff;
  font-family: "Courier New", monospace;
  font-size: 0.84rem;
  outline: none;
}

#program-select:focus-visible {
  border-color: #59f6c8;
  box-shadow: 0 0 0 2px rgba(89, 246, 200, 0.3);
}

#program-description {
  margin: 0;
  min-height: 1.35rem;
  font-family: "Courier New", monospace;
  font-size: 0.75rem;
  color: rgba(225, 244, 255, 0.95);
}

.knobs-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(90px, 1fr));
  gap: 0.5rem;
}

.knob-module {
  position: relative;
  text-align: center;
  animation: riseIn 0.45s ease-out both;
  animation-delay: var(--delay);
}

.knob-title {
  margin: 0 0 0.3rem;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  font-family: "Courier New", monospace;
}

.knob {
  --rot: -135deg;
  width: 68px;
  height: 68px;
  margin: 0 auto;
  border-radius: 50%;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.33) 0, rgba(255, 255, 255, 0.03) 20%),
    linear-gradient(180deg, var(--cap-1) 0, var(--cap-2) 100%);
  position: relative;
  border: 2px solid rgba(255, 255, 255, 0.45);
  box-shadow:
    0 7px 10px rgba(0, 0, 0, 0.32),
    inset 0 -5px 8px rgba(0, 0, 0, 0.22),
    inset 0 6px 8px rgba(255, 255, 255, 0.32);
  cursor: ns-resize;
  touch-action: none;
  outline: none;
}

.knob:focus-visible {
  box-shadow:
    0 0 0 3px rgba(0, 255, 194, 0.42),
    0 7px 10px rgba(0, 0, 0, 0.32),
    inset 0 -5px 8px rgba(0, 0, 0, 0.22),
    inset 0 6px 8px rgba(255, 255, 255, 0.32);
}

.knob::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 72px;
  height: 18px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: radial-gradient(circle at 50% 30%, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.08));
}

.knob-shadow {
  position: absolute;
  left: 10px;
  right: 10px;
  top: 10px;
  bottom: 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  opacity: 0.6;
}

.knob-pointer {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 23px;
  background: linear-gradient(180deg, #f8fdff, #ecf0f2);
  border-radius: 9px;
  transform-origin: center 22px;
  transform: translate(-50%, -50%) rotate(var(--rot));
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.5);
}

.k-red {
  --cap-1: #f42e2e;
  --cap-2: #bd0c11;
}

.k-orange {
  --cap-1: #ff9833;
  --cap-2: #d46512;
}

.k-yellow {
  --cap-1: #fae950;
  --cap-2: #ceb014;
}

.k-green {
  --cap-1: #24df73;
  --cap-2: #0ba64e;
}

.k-blue {
  --cap-1: #2f74f9;
  --cap-2: #1250be;
}

.k-violet {
  --cap-1: #a05aff;
  --cap-2: #7040c8;
}

.knob-value,
.knob-freq {
  margin: 0;
  font-family: "Courier New", monospace;
}

.knob-value {
  margin-top: 0.75rem;
  font-size: 0.85rem;
}

.knob-freq {
  margin-top: 0.12rem;
  font-size: 0.7rem;
  opacity: 0.85;
}

.bottom-row {
  margin-top: 0.85rem;
  display: grid;
  grid-template-columns: 90px 1fr 90px;
  gap: 0.9rem;
  align-items: center;
}

.push {
  width: 86px;
  height: 86px;
  border: none;
  border-radius: 50%;
  color: #e9faff;
  background:
    radial-gradient(circle at 35% 25%, #6ad1ff 0, #2f9de2 45%, #0f6fb2 100%);
  box-shadow:
    0 7px 10px rgba(0, 0, 0, 0.28),
    inset 0 -5px 9px rgba(0, 40, 70, 0.34),
    inset 0 5px 8px rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
  font-family: "Trebuchet MS", sans-serif;
}

.push:hover {
  transform: translateY(-1px);
}

.push:active,
.push.is-active {
  transform: translateY(2px) scale(0.98);
  box-shadow:
    0 3px 5px rgba(0, 0, 0, 0.22),
    inset 0 -3px 4px rgba(0, 40, 70, 0.38),
    inset 0 2px 5px rgba(255, 255, 255, 0.22);
}

.push-title,
.push-sub {
  display: block;
}

.push-title {
  font-size: 0.95rem;
  font-weight: 700;
}

.push-sub {
  margin-top: 0.15rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.scope-wrap {
  background: linear-gradient(180deg, #0d1f28, #050f17);
  border-radius: 0.45rem;
  border: 1px solid rgba(170, 250, 255, 0.15);
  padding: 0.25rem;
  box-shadow: inset 0 0 0 1px rgba(98, 253, 231, 0.06);
}

#scope {
  width: 100%;
  height: 110px;
  display: block;
  border-radius: 0.35rem;
}

.status-row {
  margin-top: 0.7rem;
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 0.85rem;
  background: rgba(9, 20, 26, 0.72);
  border: 1px solid rgba(132, 177, 206, 0.45);
  border-radius: 0.45rem;
  padding: 0.45rem 0.65rem;
  color: #dcf8ff;
}

.led-box {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.77rem;
  font-family: "Courier New", monospace;
}

.led {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #2a3337;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.led.on {
  background: #51f5c4;
  box-shadow: 0 0 10px rgba(81, 245, 196, 0.9);
  animation: pulseLed 1.3s ease-in-out infinite;
}

#status-text {
  margin: 0;
  text-align: right;
  font-family: "Courier New", monospace;
  color: var(--lcd-glow);
  background: var(--lcd);
  border-radius: 0.35rem;
  padding: 0.35rem 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.help {
  margin: 0;
  font-size: 0.9rem;
  font-family: "Courier New", monospace;
}

.version-pill {
  display: inline-block;
  margin-left: 0.55rem;
  padding: 0.11rem 0.4rem;
  border-radius: 999px;
  border: 1px solid rgba(12, 36, 48, 0.32);
  background: rgba(255, 255, 255, 0.35);
  color: #062534;
  font-size: 0.74em;
  letter-spacing: 0.06em;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseLed {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.15);
  }
}

@media (max-width: 920px) {
  .stage {
    width: min(1100px, 100% - 0.8rem);
    min-height: 100dvh;
    padding: 0.6rem 0 0.5rem;
    gap: 0.5rem;
  }

  h1 {
    font-size: clamp(1.5rem, 5.8vw, 2.1rem);
    margin-bottom: 0.45rem;
  }

  .program-panel {
    grid-template-columns: auto 1fr;
    gap: 0.35rem 0.45rem;
    margin-bottom: 0.7rem;
  }

  #program-description {
    grid-column: 1 / -1;
    min-height: 0;
    font-size: 0.68rem;
  }

  .knobs-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0.2rem;
  }

  .knob-title {
    margin-bottom: 0.2rem;
    font-size: 0.6rem;
  }

  .knob {
    width: 50px;
    height: 50px;
  }

  .knob-pointer {
    height: 18px;
    transform-origin: center 17px;
  }

  .knob-value {
    margin-top: 0.42rem;
    font-size: 0.72rem;
  }

  .knob-freq {
    font-size: 0.62rem;
  }

  .bottom-row {
    grid-template-columns: 72px 1fr 72px;
    gap: 0.45rem;
  }

  .push {
    width: 68px;
    height: 68px;
  }

  .push-title {
    font-size: 0.82rem;
  }

  .push-sub {
    font-size: 0.58rem;
  }

  #scope {
    height: 82px;
  }

  .status-row {
    grid-template-columns: auto auto 1fr;
    gap: 0.55rem;
    padding: 0.35rem 0.45rem;
  }

  #status-text {
    font-size: 0.68rem;
    padding: 0.26rem 0.35rem;
    text-align: right;
  }

  .help {
    font-size: 0.72rem;
  }

  .version-pill {
    margin-left: 0.38rem;
    padding: 0.08rem 0.34rem;
  }

  .top-right-meta {
    top: 0.45rem;
    right: 0.1rem;
  }
}

@media (max-width: 520px) {
  .stage {
    width: min(1100px, 100% - 0.5rem);
    padding-top: 0.45rem;
  }

  .board {
    padding: 0.75rem 0.45rem 0.55rem;
  }

  .program-panel label {
    font-size: 0.7rem;
  }

  #program-select {
    padding: 0.32rem 0.45rem;
    font-size: 0.76rem;
  }

  .ports {
    margin-bottom: 0.7rem;
  }

  .din {
    width: 48px;
    height: 48px;
  }

  .xiao {
    width: 70px;
    height: 24px;
  }

  .knob {
    width: 43px;
    height: 43px;
  }

  .knob-pointer {
    height: 15px;
    transform-origin: center 14px;
  }

  .knob-value {
    font-size: 0.66rem;
  }

  .knob-freq {
    font-size: 0.56rem;
  }

  .bottom-row {
    grid-template-columns: 58px 1fr 58px;
  }

  .push {
    width: 56px;
    height: 56px;
  }

  .push-title {
    font-size: 0.72rem;
  }

  .push-sub {
    margin-top: 0.05rem;
    font-size: 0.5rem;
  }

  #scope {
    height: 66px;
  }

  .status-row {
    gap: 0.36rem;
    padding: 0.26rem 0.3rem;
  }

  .led-box {
    font-size: 0.64rem;
    gap: 0.25rem;
  }

  #status-text {
    font-size: 0.6rem;
  }

  .help {
    font-size: 0.64rem;
  }

  .version-pill {
    margin-left: 0;
    font-size: 0.66em;
    padding: 0.07rem 0.28rem;
  }

  .top-right-meta {
    top: 0.35rem;
    right: 0.08rem;
  }
}