:root {
  --fundo: #f3f5f9;
  --cartao: #ffffff;
  --texto: #0f172a;
  --suave: #64748b;
  --borda: #e2e8f0;
  --azul: #2563eb;
  --azul-escuro: #1d4ed8;
  --verde: #16a34a;
  --amarelo: #d97706;
  --vermelho: #dc2626;
  --term: #0b1020;
  --raio: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fundo: #0b1120;
    --cartao: #111a2e;
    --texto: #e2e8f0;
    --suave: #94a3b8;
    --borda: #1e293b;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--fundo);
  color: var(--texto);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
[hidden] { display: none !important; }
button {
  font: inherit; font-weight: 600; cursor: pointer;
  border: 0; border-radius: 8px; padding: 9px 16px;
  background: var(--azul); color: #fff;
}
button:hover { background: var(--azul-escuro); }
button:disabled { opacity: .6; cursor: wait; }
button.secundario { background: transparent; color: var(--texto); border: 1px solid var(--borda); }
button.secundario:hover { background: var(--borda); }
.discreto { color: var(--suave); font-size: 14px; }
.erro { color: var(--vermelho); min-height: 1.2em; margin: 8px 0 0; font-size: 14px; }

.cartao { background: var(--cartao); border: 1px solid var(--borda); border-radius: var(--raio); padding: 18px; }
.marca { display: flex; align-items: center; gap: 12px; }
.marca strong { display: block; font-size: 18px; letter-spacing: .5px; }
.marca small { display: block; color: var(--suave); font-size: 13px; }
.logo {
  width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  background: var(--azul); color: #fff; font-weight: 800; font-size: 20px;
}

/* entrar */
.tela-entrar { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.entrar { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 14px; padding: 28px; }
.entrar .marca { margin-bottom: 6px; }
.entrar label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; }
.entrar input {
  font: inherit; padding: 11px 12px; border-radius: 8px;
  border: 1px solid var(--borda); background: var(--fundo); color: var(--texto);
}
.entrar input:focus { outline: 2px solid var(--azul); outline-offset: 1px; }
.entrar input[name=codigo] { letter-spacing: 6px; font-size: 20px; text-align: center; }
.entrar button { padding: 12px; margin-top: 4px; }
.rodape-entrar { color: var(--suave); font-size: 12px; text-align: center; margin: 0; }

/* painel */
.topo {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 20px; background: var(--cartao); border-bottom: 1px solid var(--borda);
  position: sticky; top: 0; z-index: 5;
}
.acoes { display: flex; align-items: center; gap: 12px; }
main { padding: 20px; max-width: 1500px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.grade { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.medida { background: var(--cartao); border: 1px solid var(--borda); border-radius: var(--raio); padding: 14px 16px; display: flex; flex-direction: column; gap: 6px; }
.medida span { color: var(--suave); font-size: 13px; text-transform: uppercase; letter-spacing: .5px; }
.medida strong { font-size: 24px; }
.medida small { color: var(--suave); font-size: 13px; }
.barra { height: 6px; background: var(--borda); border-radius: 99px; overflow: hidden; }
.barra i { display: block; height: 100%; width: 0; background: var(--verde); transition: width .4s; }
.barra i.medio { background: var(--amarelo); }
.barra i.alto { background: var(--vermelho); }

.colunas { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 16px; align-items: start; }
.cab { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 12px; }
.cab h2 { margin: 0; font-size: 17px; display: flex; align-items: center; gap: 10px; }
.botoes { display: flex; gap: 8px; }
.selo { font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 99px; background: var(--borda); color: var(--suave); }
.selo.ligado { background: #dcfce7; color: #166534; }
.selo.erro-selo { background: #fee2e2; color: #991b1b; }

.terminal { background: var(--term); border-radius: 8px; padding: 8px; height: 62vh; min-height: 360px; }
#bloco-terminal:fullscreen { padding: 12px; border-radius: 0; display: flex; flex-direction: column; }
#bloco-terminal:fullscreen .terminal { flex: 1; height: auto; }

.lateral h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--suave); margin: 14px 0 6px; }
.lista { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.lista li { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--borda); border-radius: 8px; }
.lista li b { font-weight: 600; font-size: 14px; word-break: break-all; }
.lista li small { display: block; color: var(--suave); font-size: 12px; }
.ponto { width: 9px; height: 9px; border-radius: 50%; flex: none; background: var(--vermelho); }
.ponto.ativo { background: var(--verde); }
.lista .vazio { color: var(--suave); font-size: 13px; border-style: dashed; }

@media (max-width: 1000px) {
  .colunas { grid-template-columns: 1fr; }
  .grade { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  main { padding: 12px; }
  .grade { grid-template-columns: 1fr; }
  .topo { padding: 10px 12px; }
  #quem { display: none; }
  .terminal { height: 55vh; }
}