body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
  padding: 0;
  height: 100vh;
  background: linear-gradient(135deg, #0044cc, #00b368);
  background-size: 400% 400%;
  animation: gradientShift 12s ease infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: #fff;
}
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* 💫 Íconos flotantes */
.floating-icons {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 1;
}
.floating-icon {
  position: absolute;
  font-size: 1.8rem;
  color: rgba(255,255,255,0.12);
  animation: floatIcon 10s infinite ease-in-out;
}
@keyframes floatIcon {
  0%,100% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
  50% { transform: translateY(-25px) rotate(10deg); opacity: 0.7; }
}

/* 🧭 Caja principal */
.login-container {
  position: relative;
  z-index: 5;
  width: 100%;
  max-width: 400px;
  padding: 20px;
  box-sizing: border-box;
}
.form-box {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(14px);
  border-radius: 16px;
  padding: 35px 30px;
  box-shadow: 0 10px 35px rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.25);
  opacity: 0;
  transform: translateY(60px);
  transition: all 0.8s ease;
}
.form-box.show {
  opacity: 1;
  transform: translateY(0);
}

/* 🛡 Icono central */
.admin-icon-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 18px;
}
.admin-icon {
  font-size: 3.5rem;
  background: linear-gradient(135deg, #007bff, #00b368);
  border-radius: 50%;
  width: 90px;
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
  animation: floatAdmin 4s ease-in-out infinite;
}
@keyframes floatAdmin {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

h2 {
  text-align: center;
  font-weight: 600;
  font-size: 1.8rem;
  margin-bottom: 8px;
}
.description {
  text-align: center;
  font-size: 0.9rem;
  margin-bottom: 25px;
  opacity: 0.8;
}

/* 🧩 Inputs */
.input-group {
  position: relative;
  margin-bottom: 22px;
  width: 100%;
}
.input-group i.fa-user,
.input-group i.fa-lock {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  opacity: 0.75;
  font-size: 1rem;
}
.input-group input {
  width: 100%;
  padding: 14px 45px;
  border: none;
  border-radius: 10px;
  background: rgba(255,255,255,0.18);
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
}
.input-group input::placeholder {
  color: rgba(255,255,255,0.7);
}
.input-group input:focus {
  background: rgba(255,255,255,0.28);
  box-shadow: 0 0 10px rgba(255,255,255,0.4);
}

/* 👁 Mostrar/ocultar contraseña */
.toggle-password {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  color: #fff;
  opacity: 0.7;
  font-size: 1.1rem;
  transition: all 0.3s ease;
}
.toggle-password:hover {
  opacity: 1;
  color: #00e0ff;
}

/* 🚀 Botón */
button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #007bff, #00b368);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
}
button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0,123,255,0.45);
}

/* ✈️ Avión de transición */
.plane-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  font-size: 7rem;
  color: #fff;
  opacity: 0;
  z-index: 999;
}
/* Solo el campo de usuario en mayúsculas */
#usuario {
  text-transform: uppercase;
}
#clave {
  text-transform: none !important;
}