/* ------------------------------------------------------------------ *
 *  TC -> STL — painel de reconstrução
 *  Paleta: esmalte de equipamento (claro) + visor de filme (escuro).
 *  O vermelho da máscara é exatamente o que o servidor pinta no PNG.
 * ------------------------------------------------------------------ */

:root {
  --film:      #0a0d0f;
  --film-2:    #151a1d;
  --console:   #e4e8e5;
  --card:      #f2f4f2;
  --rule:      #c3ccc7;
  --ink:       #131a17;
  --muted:     #5f6e68;
  --signal:    #1b3cd9;
  --mask:      #ff4a2e;

  --gap: 22px;
  --radius: 3px;
  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--console);
  color: var(--ink);
  font-family: var(--display);
  font-size: 15px;
  line-height: 1.5;
  /* trama fina de painel: some em telas pequenas */
  background-image: repeating-linear-gradient(
    180deg, rgba(0,0,0,.018) 0 1px, transparent 1px 4px);
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* --- cabeçalho ---------------------------------------------------- */

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(16px, 4vw, 44px) 18px;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  display: block;
  font-size: clamp(28px, 4.4vw, 46px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
}

.wordmark__arrow {
  color: var(--mask);
  padding: 0 .12em;
}

.tagline {
  margin: 8px 0 0;
  max-width: 46ch;
  color: var(--muted);
  font-size: 14px;
}

.service {
  display: flex;
  gap: 26px;
  margin: 0;
}

.service dt,
.service dd {
  font-family: var(--mono);
  font-size: 11px;
  margin: 0;
}

.service dt {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .14em;
}

.service dd { font-weight: 500; }

/* --- estrutura ---------------------------------------------------- */

.console {
  display: grid;
  grid-template-columns: minmax(320px, 400px) 1fr;
  gap: var(--gap);
  align-items: start;
  padding: var(--gap) clamp(16px, 4vw, 44px);
}

.rail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: sticky;
  top: var(--gap);
}

/* --- etapas ------------------------------------------------------- */

.step {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.step__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  padding: 13px 16px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.step__mark {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
}

.step__body {
  padding: 0 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step__lead { margin: 0; font-size: 13px; color: var(--muted); }

.step.is-locked { opacity: .42; }
.step.is-locked .step__body { display: none; }
.step.is-locked .step__title { padding-bottom: 13px; }

.step.is-done .step__mark { color: var(--signal); }

/* --- zona de envio ------------------------------------------------ */

.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 26px 16px;
  text-align: center;
  cursor: pointer;
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color .15s, background .15s;
}

.drop:hover,
.drop.is-hot {
  border-color: var(--signal);
  background: #fbfcff;
}

.drop__lead { margin: 0; font-weight: 600; }

.drop__hint {
  margin: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--muted);
  letter-spacing: .02em;
}

.drop__cta {
  margin-top: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--signal);
  border-bottom: 1px solid currentColor;
}

.raster {
  border-left: 2px solid var(--rule);
  padding-left: 12px;
}

.raster__note { margin: 0 0 8px; font-size: 12.5px; color: var(--muted); }

.raster__grid { display: flex; gap: 8px; }

.raster__grid label {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
}

.raster__grid input {
  width: 100%;
  padding: 6px 7px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

/* --- controles ---------------------------------------------------- */

.field { display: flex; flex-direction: column; gap: 5px; }

.field label {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
}

.field label .mono { color: var(--ink); font-weight: 500; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 18px;
  background: transparent;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--rule);
}

input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--rule);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px;
  height: 13px;
  margin-top: -5.5px;
  border-radius: 50%;
  background: var(--signal);
  border: 2px solid var(--card);
}

input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--signal);
  border: 2px solid var(--card);
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.check input { accent-color: var(--signal); width: 15px; height: 15px; }

.primary {
  display: block;
  width: 100%;
  padding: 11px 14px;
  text-align: center;
  text-decoration: none;
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--signal);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .15s;
}

.primary:hover { background: #142fae; }

.primary[disabled],
.primary.is-off {
  background: var(--rule);
  color: var(--muted);
  cursor: not-allowed;
}

.link-btn {
  align-self: flex-start;
  padding: 0;
  font-family: var(--display);
  font-size: 12.5px;
  color: var(--signal);
  background: none;
  border: none;
  border-bottom: 1px solid currentColor;
  cursor: pointer;
}

/* --- leituras ----------------------------------------------------- */

.readout { display: grid; grid-template-columns: auto 1fr; gap: 3px 14px; margin: 0; }

.readout dt {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  padding-top: 2px;
}

.readout dd { margin: 0; font-family: var(--mono); font-size: 12.5px; }

.readout dd.warn { color: var(--mask); }

.notes { margin: 0; padding-left: 15px; }

.notes li { font-size: 12.5px; color: var(--muted); margin-bottom: 4px; }

.progress { display: flex; flex-direction: column; gap: 5px; }

.progress__bar { height: 3px; background: var(--rule); overflow: hidden; }

.progress__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--signal);
  transition: width .25s ease-out;
}

.progress__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* --- painéis da direita ------------------------------------------- */

.stage { display: flex; flex-direction: column; gap: var(--gap); min-width: 0; }

.panel {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--rule);
}

.panel__head h2 {
  margin: 0;
  font-size: 11px;
  font-family: var(--mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .16em;
  color: var(--muted);
}

.axis { display: flex; gap: 0; }

.axis button {
  padding: 5px 11px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--rule);
  margin-left: -1px;
  cursor: pointer;
}

.axis button:first-child { border-radius: var(--radius) 0 0 var(--radius); margin-left: 0; }
.axis button:last-child { border-radius: 0 var(--radius) var(--radius) 0; }

.axis button.is-on { color: #fff; background: var(--ink); border-color: var(--ink); }

.viewport {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
  padding: 18px;
  background: var(--film);
  background-image: radial-gradient(circle at 50% 45%, var(--film-2), var(--film) 72%);
}

.viewport img,
.viewport canvas {
  max-width: 100%;
  max-height: 62vh;
  display: block;
  image-rendering: auto;
}

.viewport__empty {
  margin: 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.9;
  letter-spacing: .06em;
  color: #4b5a55;
}

.viewport__tools {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  gap: 0;
}

.viewport__tools button {
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: #8d9a95;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  margin-left: -1px;
  cursor: pointer;
}

.viewport__tools button.is-on { color: var(--film); background: #dfe5e2; }

.scrub {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  border-top: 1px solid var(--rule);
}

.scrub input[type="range"] { flex: 1; }

.scrub output { font-size: 11.5px; color: var(--muted); white-space: nowrap; }

.scrub select {
  font-family: var(--mono);
  font-size: 11px;
  padding: 5px 7px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

/* --- régua de Hounsfield ------------------------------------------ */

.threshold {
  font-size: 17px;
  font-weight: 500;
  color: var(--mask);
  letter-spacing: -0.01em;
}

#ruler {
  display: block;
  width: 100%;
  height: 190px;
  cursor: ew-resize;
  touch-action: none;
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 16px 12px;
}

.presets button {
  padding: 5px 10px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 20px;
  cursor: pointer;
}

.presets button:hover { border-color: var(--signal); color: var(--signal); }

.scale__hint {
  margin: 0;
  padding: 0 16px 14px;
  max-width: 68ch;
  font-size: 12.5px;
  color: var(--muted);
}

/* --- avisos ------------------------------------------------------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 20;
  max-width: min(560px, 90vw);
  padding: 12px 18px;
  font-size: 13.5px;
  color: #fff;
  background: var(--ink);
  border-left: 3px solid var(--mask);
  border-radius: var(--radius);
  box-shadow: 0 8px 26px rgba(0,0,0,.22);
}

.colophon {
  padding: 22px clamp(16px, 4vw, 44px) 34px;
  border-top: 1px solid var(--rule);
}

.colophon p { margin: 0; max-width: 72ch; font-size: 12px; color: var(--muted); }

.mono { font-family: var(--mono); }

/* --- telas estreitas ---------------------------------------------- */

@media (max-width: 900px) {
  body { background-image: none; }
  .console { grid-template-columns: 1fr; }
  .rail { position: static; }
  .viewport { min-height: 300px; }
  .viewport img, .viewport canvas { max-height: 52vh; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}