/* Estilo aprimorado para o botão de login */
#loginBtn.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1rem 0;
    font-size: 1.15rem;
    font-weight: 700;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--primary-color) 60%, var(--primary-dark) 100%);
    box-shadow: 0 2px 8px rgba(166,197,15,0.10);
    border: none;
    transition: background 0.2s, box-shadow 0.2s, transform 0.1s;
    position: relative;
    overflow: hidden;
}
#loginBtn.btn:hover, #loginBtn.btn:focus {
    background: linear-gradient(90deg, var(--primary-dark) 60%, var(--primary-color) 100%);
    box-shadow: 0 4px 16px rgba(86,150,28,0.13);
    transform: translateY(-2px) scale(1.01);
}
#loginBtn .btn-text {
    flex: 1;
    text-align: center;
    letter-spacing: 0.5px;
}
#loginBtn .btn-loader {
    display: inline-block;
    width: 22px;
    height: 22px;
    border: 3px solid #fff;
    border-top: 3px solid var(--primary-dark);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 0.5rem;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
@media (max-width: 600px) {
    #loginBtn.btn {
        font-size: 1rem;
        padding: 0.85rem 0;
    }
}