:root{
    --page-bg: #212121;
    --font-color: #ffffff;
    --std-box-shadow: 0px 4px 10px -3px rgba(0,0,0,0.7);

    --color-red: #ff2828;
    --color-green: #5eff29;
    --color-blue: #3d3dff;
}

body{
    background-color: var(--page-bg);
    color: var(--font-color);
}

.text-green{
  color: var(--color-green);
}

.text-blue{
  color: var(--color-blue);
}

.text-red{
  color: var(--color-red);
}

.text-white{
  color: var(--font-color);
}

.label-sm{
  font-size: 0.5rem;
}

.std-card{
    box-shadow: var(--std-box-shadow);
    border-radius: 20px;
    padding: 1rem;
    border-top: 2px #000;
    border-left: 2px #000;
    background: var(--page-bg);
}


.std-btn{
    padding: 0.5rem;
    background-color: var(--page-bg);
    border: 1px solid #c9c9c9ff;
    color: var(--font-color);
    border-radius: 8px;
}


#page-title{
  font-weight: bold;
  font-size: 4rem;
}


#floating-audi-control {
    position: fixed;
    left: 50%;
    bottom: 1rem;
    transform: translateX(-50%);
    padding: 1rem 2rem;
    width: 50vw;
    z-index: 999;
}


.vertical-range {
  writing-mode: bt-lr;
  -webkit-appearance: slider-vertical;
  width: 8px;
  height: 150px;
}




.control-panel {
  background-color: #1b1b1b;
  border: 1px solid #2a2a2a;
  max-width: 480px;
  margin: auto;
  padding: 1.5rem 1rem;
}

.control-block {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.control-label {
  color: var(--font-color);
  font-weight: 600;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.control-value {
  margin-top: 1rem;
  background-color: #141414;
  color: var(--font-color);
  border: 1px solid #333;
  border-radius: 6px;
  padding: 0.25rem 0.8rem;
  font-size: 0.9rem;
  box-shadow: var(--std-box-shadow);
}


.fader-area {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
}

.fader-scale {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 180px;
}

.fader-scale span {
  display: block;
  width: 8px;
  height: 1px;
  background: #888;
  opacity: 0.6;
}


.fader-wrap {
  height: 180px;
  width: 40px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  transform: rotate(-90deg);
  transform-origin: center;
}


.fader {
  -webkit-appearance: none;
  width: 180px;
  height: 8px;
  background: #111;
  border-radius: 10px;
  outline: none;
  cursor: pointer;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6),
              inset 0 -2px 3px rgba(255, 255, 255, 0.05);
}

.fader::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 28px;
  background: #d0d0d0;
  border: 1px solid #666;
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.6);
  cursor: grab;
  transition: background 0.1s ease;
}

.fader::-webkit-slider-thumb:active {
  background: #eee;
  cursor: grabbing;
}

.fader::-moz-range-thumb {
  width: 16px;
  height: 28px;
  background: #d0d0d0;
  border: 1px solid #666;
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.6);
  cursor: grab;
  transition: background 0.1s ease;
}

.fader::-moz-range-thumb:active {
  background: #eee;
  cursor: grabbing;
}

.fader::-webkit-slider-runnable-track,
.fader::-moz-range-track {
  background: transparent;
  border-radius: 10px;
}


#canvas {
  display: block;
  width: 80%;
  height: auto;
  max-width: 80%;
  border: 1px solid #333;
  border-radius: 12px;
  box-shadow: var(--std-box-shadow);
  background-color: #111;
  object-fit: contain;
  margin-left: auto;
  margin-right: auto;
}