@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700&display=swap');

:root {
  --fundo:      #14161a;
  --painel:     #1d2128;
  --painel-alto:#252b34;
  --traco:      #2f3743;
  --texto:      #e9ecf1;
  --texto-fraco:#949dab;
  --ambar:      #f5a524;
  --verde:      #35c489;
  --vermelho:   #e03e3e;
  --raio:       10px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--fundo);
  color: var(--texto);
  font-family: Barlow, system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
}

body { padding-bottom: 96px; }

:focus-visible { outline: 3px solid var(--ambar); outline-offset: 2px; }

/* ---------------------------------------------------------------- entrada */
.entrada {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.entrada form {
  width: 100%;
  max-width: 360px;
  background: var(--painel);
  border: 1px solid var(--traco);
  border-radius: var(--raio);
  padding: 32px 26px;
}
.entrada h1 { font-size: 26px; margin: 0 0 6px; font-weight: 700; letter-spacing: -0.01em; }
.entrada p  { margin: 0 0 26px; color: var(--texto-fraco); font-size: 15px; }

label { display: block; font-size: 14px; color: var(--texto-fraco); margin: 16px 0 6px; }

input[type=text], input[type=password] {
  width: 100%;
  padding: 13px 14px;
  background: var(--fundo);
  border: 1px solid var(--traco);
  border-radius: 8px;
  color: var(--texto);
  font: inherit;
}

.principal {
  width: 100%;
  margin-top: 26px;
  padding: 15px;
  border: 0;
  border-radius: 8px;
  background: var(--ambar);
  color: #17191d;
  font: 600 17px Barlow, sans-serif;
  cursor: pointer;
}
.principal:hover { background: #ffb43c; }

.erro {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--vermelho);
  background: rgba(224, 62, 62, .12);
  border-radius: 0 8px 8px 0;
  font-size: 15px;
}
.erro[hidden] { display: none; }

/* ------------------------------------------------------------------ topo */
.topo {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: rgba(20, 22, 26, .94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--traco);
}
.topo h1 { font-size: 19px; margin: 0; font-weight: 600; flex: 1; }
.topo button {
  background: none;
  border: 1px solid var(--traco);
  color: var(--texto-fraco);
  padding: 7px 13px;
  border-radius: 7px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.farol {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--texto-fraco);
}
.farol i {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--vermelho);
  flex: none;
}
.farol.ativo i { background: var(--verde); box-shadow: 0 0 0 4px rgba(53,196,137,.18); }

/* --------------------------------------------------------------- conteudo */
main { max-width: 900px; margin: 0 auto; padding: 20px 18px; }

.vazio {
  border: 1px dashed var(--traco);
  border-radius: var(--raio);
  padding: 46px 24px;
  text-align: center;
  color: var(--texto-fraco);
}
.vazio strong { display: block; color: var(--texto); font-size: 18px; margin-bottom: 8px; }

.aparelho {
  background: var(--painel);
  border: 1px solid var(--traco);
  border-radius: var(--raio);
  overflow: hidden;
  margin-bottom: 18px;
}
.aparelho > header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--traco);
}
.aparelho h2 { font-size: 18px; margin: 0; font-weight: 600; flex: 1; }
.dados {
  padding: 10px 18px;
  font-size: 13.5px;
  color: var(--texto-fraco);
  border-bottom: 1px solid var(--traco);
  font-variant-numeric: tabular-nums;
}

.motores { display: grid; gap: 1px; background: var(--traco); }
@media (min-width: 620px) { .motores { grid-template-columns: 1fr 1fr; } }

.motor { background: var(--painel); padding: 20px 18px 24px; }
.motor h3 { margin: 0 0 16px; font-size: 16px; font-weight: 600; }

.rocker { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.rocker button {
  padding: 18px 6px;
  border: 1px solid var(--traco);
  border-radius: 8px;
  background: var(--painel-alto);
  color: var(--texto);
  font: 600 15px Barlow, sans-serif;
  cursor: pointer;
  touch-action: manipulation;
}
.rocker button:hover { border-color: #3d4756; }
.rocker button[aria-pressed=true] { background: var(--ambar); border-color: var(--ambar); color: #17191d; }
.rocker button.parar[aria-pressed=true] { background: var(--texto-fraco); border-color: var(--texto-fraco); }

.velocidade { margin-top: 20px; }
.velocidade div { display: flex; justify-content: space-between; font-size: 14px; color: var(--texto-fraco); }
.velocidade b { color: var(--ambar); font-variant-numeric: tabular-nums; font-size: 17px; }

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 34px;
  background: transparent;
  margin-top: 4px;
}
input[type=range]::-webkit-slider-runnable-track {
  height: 10px; border-radius: 5px; background: var(--painel-alto); border: 1px solid var(--traco);
}
input[type=range]::-moz-range-track {
  height: 10px; border-radius: 5px; background: var(--painel-alto); border: 1px solid var(--traco);
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 34px; height: 34px; margin-top: -13px;
  border-radius: 50%; background: var(--ambar); border: 3px solid var(--fundo);
  cursor: grab;
}
input[type=range]::-moz-range-thumb {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--ambar); border: 3px solid var(--fundo); cursor: grab;
}

.juntos {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-top: 1px solid var(--traco);
  font-size: 15px; color: var(--texto-fraco);
}
.juntos input { width: 20px; height: 20px; accent-color: var(--ambar); }

.avancado { padding: 0 18px 16px; }
.avancado summary { cursor: pointer; font-size: 14px; color: var(--texto-fraco); padding: 8px 0; }
.avancado button {
  margin: 8px 8px 0 0; padding: 10px 14px;
  background: none; border: 1px solid var(--traco); border-radius: 7px;
  color: var(--texto-fraco); font: inherit; font-size: 14px; cursor: pointer;
}

/* -------------------------------------------------------------- parada */
.parada {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  padding: 14px 18px calc(14px + env(safe-area-inset-bottom, 0px));
  background: rgba(20, 22, 26, .95);
  border-top: 1px solid var(--traco);
  backdrop-filter: blur(8px);
}
.parada button {
  display: block;
  width: 100%; max-width: 900px; margin: 0 auto;
  padding: 20px;
  border: 0; border-radius: var(--raio);
  background: var(--vermelho);
  color: #fff;
  font: 700 19px Barlow, sans-serif;
  letter-spacing: .01em;
  cursor: pointer;
}
.parada button:hover { background: #f04a4a; }
.parada button:active { transform: scale(.995); }

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