body {
  background-color: black;
  color: #00FF00;
  font-family: 'Courier New', Courier, monospace;
  padding: 2rem;
  margin: 0;
}
h1 {
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.tool {
  margin: 1rem 0;
}
a {
  color: #00FF00;
  text-decoration: underline;
}

/* === INPUTS Y BOTONES UNIVERSALES === */
input, button, select, input[type="submit"] {
  background-color: #000;
  border: 1.7px solid #00FF00;
  color: #00FF00;
  font-family: monospace;
  padding: 0.5rem;
  margin-top: 1rem;
  border-radius: 0;
  box-shadow: 0 0 6px #00FF0044 inset;
  transition: background .15s, color .15s, border .15s;
  font-size: 1.09em;
}

/* === BOTONES PRINCIPALES VERDES (como en IPTools) === */
button, input[type="submit"], .iptools-btn {
  background: #00FF00;
  color: #000;
  border: 1.7px solid #00FF00;
  font-family: 'Fira Mono', 'IBM Plex Mono', Courier, monospace;
  font-size: 1.09em;
  padding: 0.32em 1.05em;
  cursor: pointer;
  border-radius: 0;
  font-weight: bold;
  box-shadow: 0 0 6px #00FF0044;
  margin-top: 1rem;
  transition: background .15s, color .15s;
}
button:hover, input[type="submit"]:hover, .iptools-btn:hover {
  background: #000;
  color: #00FF00;
}

/* === BOTÓN DE VOLVER ESPECIAL RETRO === */
.volver {
  color: #00FF00;
  text-decoration: none;
  font-size: 1.5rem;
  border: 1px dashed #00FF00;
  padding: 0.38rem 0.92rem;
  font-family: monospace;
  margin: 2.2rem auto 1.5rem auto;
  display: inline-block;
  background: transparent;
  border-radius: 0;
  transition: background .15s;
}
.volver:hover {
  background: #00FF0044;
  color: #00FF00;
}

/* === TABLAS ESTILO RETRO === */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  background: transparent;
}
th, td {
  border: 1px solid #00FF00;
  padding: 0.49em 0.8em;
  font-size: 1.12em;
  border-radius: 0;
  font-family: inherit;
}
th {
  background: rgba(0,255,0,0.10);
  color: #00FF00;
  text-align: left;
  font-weight: bold;
}
td {
  background: rgba(0,255,0,0.05);
  color: #00FF00;
  text-align: left;
  font-weight: normal;
}

/* === CUADROS DE RESULTADO/OUTPUT/CAJAS IP === */
pre, .output, .ip-box {
  background-color: #111;
  border: 1px dashed #00FF00;
  padding: 1rem;
  margin-top: 1rem;
  white-space: pre-wrap;
  word-break: break-word;
  display: inline-block;
  font-size: 1.2rem;
}

@media (max-width: 600px) {
  body { padding: 1rem; font-size: 90%; }
  h1 { font-size: 1.4rem; }
  .ip-box, .output, pre { width: 100%; font-size: 1rem; }
  input, button { width: 100%; box-sizing: border-box; }
}
.flag, img.flag {
  border: none !important;
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin: 0 0.3em;
  width: 32px;
  height: 32px;
  vertical-align: middle;
}