body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #1e3c72, #2a5298); /* azul profundo a azul claro */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

h1 {
  color: #f0f4f8;
  text-shadow: 1px 1px 4px #000;
}

.btn-container {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

button {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  color: white;
  background: linear-gradient(45deg, #ff6b6b, #48c6ef); /* coral a turquesa */
  transition: transform 0.2s;
}

button:hover {
  transform: scale(1.05);
}

.modal {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.6);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background: linear-gradient(135deg, #fceabb, #f8b500); /* dorado suave */
  padding: 30px;
  border-radius: 12px;
  width: 300px;
  text-align: center;
  color: #333;
  box-shadow: 0 0 15px rgba(0,0,0,0.3);
}

.close {
  margin-top: 15px;
  background: linear-gradient(45deg, #ff6b6b, #f06595); /* coral a rosado fuerte */
}

.main-header {
  text-align: center;
  padding: 20px;
  background: linear-gradient(to right, #6a11cb, #2575fc); /* púrpura a azul vibrante */
  color: white;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  margin-bottom: 30px;
}

.main-header h2 {
  margin: 0;
  font-size: 28px;
}

.main-header p {
  margin-top: 8px;
  font-size: 16px;
}

.footer {
  width: 100%;
  text-align: center;
  padding: 15px 0;
  background: linear-gradient(to right, #238260, #2a9896); /* mismo fondo que el body */
  color: #f0f4f8;
  font-size: 14px;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.3);
  position: absolute;
  bottom: 0;
  left: 0;
}

.top-header {
  width: 100%;
  padding: 20px;
  background: linear-gradient(to right, #1e3c72, #2a5298); /* mismo degradado que el body */
  color: #f0f4f8;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1001;
}

.top-header h1 {
  margin: 0;
  font-size: 26px;
}

.top-header p {
  margin: 5px 0 0;
  font-size: 14px;
}

body {
  margin-top: 100px; /* ajusta según el alto del encabezado */
}