/* Fondo general */
body {
  background: linear-gradient(135deg, #0f62ac, #4facfe);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Card principal */
.card-login {
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  border: none;
  overflow: hidden;
  animation: fadeIn 0.6s ease-in-out;
}

/* Header */
.card-header {
  background: #0f62ac;
  padding: 25px;
}

#imglogin {
  max-width: 180px;
}

/* Inputs */
.form-control {
  border-radius: 10px;
  padding: 12px;
  border: 1px solid #ddd;
  transition: all 0.3s ease;
}

.form-control:focus {
  border-color: #0f62ac;
  box-shadow: 0 0 8px rgba(15,98,172,0.3);
}

/* Botones */
.btn {
  border-radius: 10px;
  padding: 10px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-primary {
  background: #0f62ac;
  border: none;
}

.btn-primary:hover {
  background: #0c4e8a;
  transform: translateY(-1px);
}

.btn-danger {
  background: #e74c3c;
  border: none;
}

.btn-danger:hover {
  background: #c0392b;
}

/* CAPTCHA */
.captcha-image {
  border-radius: 8px;
  border: 1px solid #ddd;
  margin-right: 5px;
}

.refresh-captcha {
  cursor: pointer;
  color: #0f62ac;
  font-size: 18px;
  transition: transform 0.3s;
}

.refresh-captcha:hover {
  transform: rotate(180deg);
}

/* Loader opcional */
.loader {
  display: none;
}

/* Animación */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}