/* Importamos la fuente 'Roboto' de Google Fonts para un look más profesional */
body {
    font-family: 'Roboto', sans-serif;
}
/* Contenedor principal con fondo degradado oscuro y animado (efecto metálico/moderno) */
.login-container {
    height: 100vh;
    background: linear-gradient(135deg, #2C3E50, #1D2B3A); 
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite; 
    color: #f8f9fa;
}
@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
/* Estilo del recuadro del formulario */
.login-form {
    background-color: rgba(44, 62, 80, 0.85); 
    border-radius: 15px;
    border: 1px solid rgba(0, 90, 156, 0.4);
    backdrop-filter: blur(10px); 
}
.logo-img {
    max-width: 180px;
    margin-bottom: 1rem;
    filter: drop-shadow(0px 4px 6px rgba(0,0,0,0.5)); 
}
.form-floating > .form-control {
    background-color: #34495E;
    border: 1px solid #4A6572;
    color: #FFFFFF;
    border-radius: 8px;
    transition: all 0.3s ease-in-out;
}
.form-floating > .form-control:focus {
    background-color: #4A6572;
    box-shadow: 0 0 0 0.25rem rgba(0, 90, 156, 0.4); 
    border-color: #005A9C;
    color: #FFFFFF;
}
.form-floating > label {
    color: #adb5bd;
}
.form-control:focus {
  box-shadow: none;
}
.form-floating > .form-control:focus ~ label {
  color: #0099ff;
}
.btn-primary {
    background-color: #005A9C;
    border-color: #004C80;
    padding: 0.75rem;
    font-weight: bold;
    border-radius: 8px;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}
.btn-primary:hover {
    background-color: #0070C0;
    border-color: #005A9C;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0, 90, 156, 0.3);
}