body {
  font-family: Arial, sans-serif;
  background-color: #f4f6f8;
  margin: 0;
  padding: 0;
}

.container {
  width: 80%;
  margin: 50px auto;
  text-align: center;
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.1);
}

.menu a {
  display: inline-block;
  background: #004aad;
  color: white;
  padding: 12px 20px;
  margin: 10px;
  border-radius: 8px;
  text-decoration: none;
  transition: 0.3s;
}

.menu a:hover {
  background: #002b80;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 400px;
  margin: 0 auto;
}

.login-form input {
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 1rem;
}

.login-form button {
  background-color: #004aad;
  color: white;
  border: none;
  padding: 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s;
}

.login-form button:hover {
  background-color: #002b80;
}

.logo-container {
  text-align: center;
  margin-bottom: 20px;
}

.logo-esit {
  width: 160px;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.btn-logout {
  background-color: #b30000;
  color: white;
  border: none;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1em;
  transition: 0.3s;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  display: inline-block;
  cursor: pointer;
}

.btn-logout:hover {
  background-color: #800000;
  transform: translateY(-2px);
}

.logout-container {
  text-align: center;
  margin-top: 30px;
}

.fase-btn {
  display: inline-block;
  padding: 12px 25px;
  margin: 10px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: 0.3s;
  color: white;
  background-color: #004aad;
}

.fase-btn:hover {
  transform: scale(1.05);
}

.pdf-container {
  margin: 22px 0 10px;
}

.btn-pdf {
  display: inline-block;
  background: linear-gradient(135deg, #0a66c2 0%, #004aad 100%);
  color: white;
  padding: 12px 26px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  transition: 0.3s;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.12);
}

.btn-pdf:hover {
  background: linear-gradient(135deg, #004aad 0%, #002b80 100%);
  transform: translateY(-2px);
}

.bloqueada {
  background-color: #a6a6a6 !important;
  pointer-events: none;
  cursor: not-allowed;
  opacity: 0.6;
}

.activa {
  background-color: #004aad;
}

/* ====== BOTÓN VOLVER AL MENÚ PRINCIPAL ====== */
.btn-volver {
  background-color: #040a75;
  color: white;
  border: none;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1em;
  transition: 0.3s;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  display: inline-block;
  cursor: pointer;
}

.btn-volver:hover {
  background-color: #112d4b;
  transform: translateY(-2px);
}

.volver-container {
  text-align: center;
  margin-top: 30px;
}