.contact-field-invalid {
    border-color: #ff806b !important;
    box-shadow: 0 0 0 2px rgba(255, 128, 107, .2);
}

.contact-form-error {
    display: block;
    margin-top: .5rem;
    color: #ffe2dc;
    font-size: .875rem;
    line-height: 1.4;
}

.contact-form-spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(23, 23, 23, .25);
    border-top-color: #171717;
    border-radius: 50%;
    animation: contact-form-spin .7s linear infinite;
}

.contact-form-spinner[hidden],
.contact-form-toast[hidden] {
    display: none !important;
}

[data-contact-submit-button][disabled] {
    cursor: wait;
    opacity: .8;
}

.contact-form-toast {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 10000;
    width: min(24rem, calc(100vw - 2rem));
    padding: 1rem 1.25rem;
    border: 1px solid #bbebce;
    border-left: 5px solid #16a34a;
    border-radius: .75rem;
    background: #fff;
    box-shadow: 0 16px 38px rgba(0, 0, 0, .18);
    color: #17211b;
    font-weight: 600;
    line-height: 1.5;
}

.contact-form-toast.is-error {
    border-color: #ffd2c9;
    border-left-color: #c9441b;
}

@keyframes contact-form-spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 640px) {
    .contact-form-toast {
        top: 1rem;
        right: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .contact-form-spinner { animation-duration: 1.5s; }
}