/* Paleta base */
:root {
  --bg: #000;
  --text: #fff;
  --muted: #ccc;
  --accent: #333;
}

/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  line-height: 1.5;
  min-height: 100vh;
}

/* ---------- NAV ---------- */
header {
  background: #000;
  padding: 1rem 0;
  border-bottom: 1px solid #222;
}

.nav-menu {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.nav-menu a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
  color: #fff;
  background: #111;
}

/* ---------- TITULO ---------- */
.titulo-principal {
  text-align: center;
  color: var(--muted);
  margin-top: 2rem;
  font-size: 2rem;
}

/* ---------- FORMULARIO ---------- */
.contacto-formulario {
  max-width: 700px;
  margin: 3rem auto;
  padding: 2rem;
  background: #111;
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.6);
}

.contacto-formulario label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  color: var(--muted);
}

.contacto-formulario input,
.contacto-formulario textarea {
  width: 100%;
  padding: 0.7rem;
  margin-bottom: 1rem;
  border-radius: 8px;
  border: none;
  background: #ffffff; /* fondo blanco */
  color: #000000; /* texto negro */
  font-size: 1rem;
}

.contacto-formulario button {
  background: var(--accent);
  border: none;
  color: var(--text);
  font-size: 1rem;
  padding: 0.75rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.2s ease;
}

.contacto-formulario button:hover {
  background: #400adf;
  transform: translateY(-2px);
}

/* ---------- UTILIDADES ---------- */
.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}