:root {
  color-scheme: dark;
  --black: #000;
  --panel: #080808;
  --line: #303030;
  --muted: #9b9b9b;
  --white: #fff;
}

* { box-sizing: border-box; }
html, body { min-width: 320px; min-height: 100%; margin: 0; background: var(--black); }
body { color: var(--white); font-family: Arial, Helvetica, sans-serif; }
button, input, output, select { font: inherit; }

.app-header {
  min-height: 70px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.app-header h1 { margin: 0; font-size: 21px; letter-spacing: 0; }

.studio {
  min-height: calc(100dvh - 70px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 350px);
}
.preview { position: relative; min-height: 680px; overflow: hidden; background: #111419; }
.scene { position: absolute; inset: 0; }
.scene canvas { display: block; width: 100%; height: 100%; cursor: grab; }
.scene canvas:active { cursor: grabbing; }
.preview-actions { position: absolute; top: 12px; right: 12px; z-index: 3; }
.ar-button[hidden] { display: none; }
.scene-status {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-content: center;
  gap: 10px;
  padding: 32px;
  color: var(--muted);
  text-align: center;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.scene-status[hidden] { display: none; }
.scene-status strong { color: var(--white); font-size: 16px; letter-spacing: 0; text-transform: none; }
.scene-status span { display: block; max-width: 420px; letter-spacing: 0; line-height: 1.5; text-transform: none; }
.scene-status a {
  justify-self: center;
  padding: 12px 16px;
  border: 1px solid #606060;
  color: var(--white);
  text-decoration: none;
}
.scene-status a:hover, .scene-status a:focus-visible { background: var(--white); color: var(--black); }
.scene-status--error { background: #111419; }

.quiet-button,
.icon-button,
.primary-button {
  min-height: 42px;
  border: 1px solid #505050;
  border-radius: 0;
  background: var(--black);
  color: var(--white);
  cursor: pointer;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.quiet-button, .icon-button { padding: 10px 14px; }
.primary-button { width: 100%; padding: 13px 16px; }
.quiet-button:hover, .quiet-button:focus-visible,
.icon-button:hover, .icon-button:focus-visible,
.primary-button:hover, .primary-button:focus-visible {
  border-color: var(--white);
  background: var(--white);
  color: var(--black);
}

.price-window {
  position: absolute;
  left: 18px;
  top: 18px;
  z-index: 2;
  width: min(300px, calc(100% - 36px));
  padding: 17px 19px;
  border: 1px solid rgba(255,255,255,.28);
  background: rgba(0,0,0,.84);
  backdrop-filter: blur(10px);
}
.price-window span,
.price-window small { display: block; color: var(--muted); }
.price-window span { font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.price-window strong { display: block; margin: 8px 0; font-size: 32px; line-height: 1; }
.price-window small { font-size: 10px; line-height: 1.4; }

.controls {
  padding: 28px;
  border-left: 1px solid var(--line);
  background: var(--black);
}
.controls form { display: grid; gap: 28px; margin-bottom: 28px; }
fieldset { min-width: 0; margin: 0; padding: 0 0 28px; border: 0; border-bottom: 1px solid var(--line); }
legend { margin-bottom: 24px; font-size: 10px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.range-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 62px;
  align-items: center;
  gap: 9px 12px;
  margin-top: 20px;
  color: var(--white);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .08em;
}
.range-control:first-of-type { margin-top: 0; }
.range-control span { grid-column: 1 / -1; }
.range-control output { text-align: right; color: var(--white); font: 700 10px "Courier New", monospace; }
.select-control { display: grid; gap: 10px; color: var(--white); font-size: 10px; font-weight: 800; letter-spacing: .08em; }
.select-control select {
  width: 100%;
  min-height: 42px;
  padding: 0 38px 0 12px;
  border: 1px solid #505050;
  border-radius: 0;
  background: var(--black);
  color: var(--white);
}
.select-control select:focus-visible { outline: 2px solid var(--white); outline-offset: 2px; }
input[type="range"] {
  width: 100%;
  height: 3px;
  appearance: none;
  border-radius: 0;
  background: #757575;
}
input[type="range"]::-webkit-slider-thumb {
  width: 20px;
  height: 30px;
  appearance: none;
  border: 3px solid var(--white);
  border-radius: 0;
  background: var(--black);
  cursor: ew-resize;
}
.segmented-control { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid #505050; }
.segmented-control label { position: relative; }
.segmented-control label + label { border-left: 1px solid #505050; }
.segmented-control input { position: absolute; opacity: 0; pointer-events: none; }
.segmented-control span {
  min-height: 42px;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .08em;
}
.segmented-control input:checked + span { background: var(--white); color: var(--black); }

.price-dialog {
  width: min(420px, calc(100% - 32px));
  padding: 0;
  border: 1px solid #555;
  border-radius: 0;
  background: #090909;
  color: var(--white);
}
.price-dialog::backdrop { background: rgba(0,0,0,.82); backdrop-filter: blur(7px); }
.price-dialog form { padding: 28px; display: grid; gap: 18px; }
.price-dialog header { padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.price-dialog p, .price-dialog h2 { margin: 0; }
.price-dialog header p { color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.price-dialog h2 { margin-top: 7px; font-size: 23px; }
.price-dialog label { display: grid; gap: 8px; font-size: 10px; font-weight: 800; letter-spacing: .08em; }
.price-dialog input { width: 100%; padding: 12px; border: 1px solid #505050; border-radius: 0; background: var(--black); color: var(--white); }
.form-error { min-height: 18px; color: #f3a4a4; font-size: 11px; }

@media (max-width: 780px) {
  .app-header { padding: 0 16px; }
  .studio { display: block; }
  .preview { min-height: min(62vh, 580px); border-bottom: 1px solid var(--line); }
  .controls { padding: 24px 18px 32px; border-left: 0; }
  .price-window {
    top: 10px;
    left: 10px;
    width: min(218px, calc(100% - 20px));
    padding: 10px 12px;
  }
  .price-window span { font-size: 8px; letter-spacing: .09em; }
  .price-window strong { margin: 5px 0 4px; font-size: 22px; }
  .price-window small { font-size: 8px; line-height: 1.25; }
  .ar-button { min-height: 36px; padding: 8px 10px; font-size: 9px; letter-spacing: .08em; }
}