body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(-45deg, #111542, #081e6d, #2d508d, #178ec8);
  background-size: 400% 400%;
  animation: fondoAzul 15s ease infinite;
  overflow: hidden;
}

@keyframes fondoAzul {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

header {
  width: 100%;
  text-align: center;
  padding: 15px 0;
  background-color: rgba(0, 0, 0, 0.4);
  position: fixed;
  top: 0;
  z-index: 10;
}

.header-logo {
  width: 150px;
  height: auto;
}

footer {
  position: fixed;
  bottom: 10px;
  width: 100%;
  text-align: center;
  font-size: 0.9em;
  color: white;
  opacity: 0.7;
  z-index: 10;
}

#app {
  padding-top: 140px;
  padding-bottom: 60px;
  width: 100%;
}

/* CENTRADO login */
.form-container.centered {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 200px);
}

/* SCROLL para formularios largos */
.form-container.scrollable {
  display: flex;
  justify-content: center;
  padding: 30px 20px;
  overflow-y: auto;
  max-height: calc(100vh - 160px);
}

.form-box {
  background-color: rgba(0, 0, 0, 0.4);
  padding: 25px;
  border-radius: 15px;
  width: 100%;
  max-width: 400px;
  color: white;
}

.large-form {
  max-width: 600px;
}

input, select {
  width: 94%;
  padding: 10px;
  margin: 10px 0;
  border: none;
  border-radius: 10px;
  font-size: 0.95em;
}

button {
  background-color: #00BFFF;
  color: white;
  padding: 12px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  margin: 15px;
  width: 90%;
  font-size: 1em;
}

button:hover {
  background-color: #178ec8;
}

a {
  color: #00BFFF;
  text-decoration: none;
  font-size: 0.9em;
  display: block;
  margin-top: 10px;
  text-align: center;
}

.admin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  justify-items: center;
  margin: 20px;
}

.admin-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  color: white;
}

.admin-option img {
  width: 60px;
  height: 60px;
}

.admin-option span {
  margin-top: 8px;
  font-size: 0.9em;
}

.user-home {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.icon-button {
  background-color: transparent;
  border: none;
  text-align: center;
  color: white;
  cursor: pointer;
}

.icon-button img {
  width: 90px;
  height: 90px;
}

.icon-button span {
  display: block;
  margin-top: 10px;
  font-size: 1em;
}

.cerrar-sesion {
  margin: 30px auto 0 auto;
  display: block;
  background-color: crimson;
}

.titulo-registro {
  font-size: 1.3em;
  font-weight: bold;
  margin-bottom: 20px;
  text-align: center;
}

.input-label {
  display: block;
  margin-top: 10px;
  font-size: 0.85em;
  color: #ccc;
}

.login-titulo {
  font-size: 1.5em;
  text-align: center;
  font-weight: bold;
  margin-bottom: 20px;
}