:root {
  --fundo: #0f1419;
  --folha: #1a222c;
  --texto: #e8eef4;
  --muted: #9aabbc;
  --accent: #3d9a6a;
  --accent-hover: #4db87e;
  --erro: #e07070;
  --borda: #2a3542;
  --fonte: "Segoe UI", "Candara", "Trebuchet MS", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--fonte);
  color: var(--texto);
  background:
    radial-gradient(ellipse at 20% 0%, #1c3a2e 0%, transparent 50%),
    radial-gradient(ellipse at 90% 80%, #1a2838 0%, transparent 45%),
    var(--fundo);
}

.folha {
  max-width: 36rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
}
.folha.larga {
  max-width: 52rem;
}

.grade-mestre {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10.5rem, 1fr));
  gap: 0.5rem;
  margin: 0.75rem 0 1rem;
}
.grade-mestre .botao {
  display: block;
  text-align: center;
  padding: 0.55rem 0.4rem;
  font-size: 0.82rem;
  line-height: 1.25;
}
.bloco-sinal {
  font-family: Consolas, "Cascadia Mono", monospace;
  font-size: 0.82rem;
  background: var(--fundo);
  border: 1px solid var(--borda);
  border-radius: 6px;
  padding: 0.75rem;
  white-space: pre-wrap;
  margin: 0.5rem 0;
}
.campo-ip {
  width: 100%;
  max-width: 16rem;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  background: var(--folha);
  color: var(--texto);
  border: 1px solid var(--borda);
}

.marca {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 650;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.1rem;
  margin: 1.75rem 0 0.5rem;
}

.lead {
  color: var(--muted);
  line-height: 1.55;
  margin: 0 0 1.25rem;
}

.passos {
  padding-left: 1.25rem;
  line-height: 1.55;
  color: var(--texto);
}
.passos li { margin-bottom: 0.45rem; }

.nota {
  font-size: 0.9rem;
  color: var(--muted);
  border-left: 3px solid var(--borda);
  padding-left: 0.75rem;
  margin: 1.5rem 0;
}

.acoes { margin-top: 1.5rem; }
.acoes a:not(.botao) { color: var(--muted); }

button.botao {
  border: 0;
  cursor: pointer;
  font: inherit;
}
.botao {
  display: inline-block;
  background: var(--accent);
  color: #04140c !important;
  text-decoration: none;
  font-weight: 650;
  padding: 0.7rem 1.15rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}
.botao:hover { background: var(--accent-hover); }

form label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--muted);
}
form input[type="text"] {
  width: 100%;
  font-size: 1.35rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.65rem 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid var(--borda);
  border-radius: 4px;
  background: var(--folha);
  color: var(--texto);
}
form button.botao { width: 100%; }

.erro {
  color: var(--erro);
  background: rgba(224, 112, 112, 0.12);
  padding: 0.6rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

code {
  font-size: 0.92em;
  background: var(--folha);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

a { color: var(--accent-hover); }