.pi-form-wrapper {
    margin: 0 auto;
    max-width: 720px;
}

/* Flex row that holds side-by-side fields */
.pi-fields-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -8px;
}

.pi-form-group {
    padding: 0 8px;
    box-sizing: border-box;
}

/* Width classes — map to stored integer values */
.pi-field-w-25  { flex: 0 0 25%;       max-width: 25%; }
.pi-field-w-33  { flex: 0 0 33.3333%;  max-width: 33.3333%; }
.pi-field-w-50  { flex: 0 0 50%;       max-width: 50%; }
.pi-field-w-66  { flex: 0 0 66.6666%;  max-width: 66.6666%; }
.pi-field-w-75  { flex: 0 0 75%;       max-width: 75%; }
.pi-field-w-100 { flex: 0 0 100%;      max-width: 100%; }

/* Stack all fields on mobile */
@media (max-width: 640px) {
    .pi-field-w-25,
    .pi-field-w-33,
    .pi-field-w-50,
    .pi-field-w-66,
    .pi-field-w-75 {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

.pi-form .form-group {
    margin-bottom: 18px;
}

.pi-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
}

.pi-form .form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.pi-form .form-control:focus {
    border-color: #4a90d9;
    outline: none;
    box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.2);
}

.pi-required {
    color: #c0392b;
}

.pi-field-has-error .form-control,
.pi-field-has-error select,
.pi-field-has-error textarea {
    border-color: #c0392b;
}

.pi-field-error {
    color: #c0392b;
    font-size: 13px;
    margin-top: 4px;
}

.pi-form-footer {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.pi-form-submit {
    padding: 10px 28px;
    font-size: 15px;
    cursor: pointer;
}

.pi-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: #333;
    border-radius: 50%;
    animation: pi-spin 0.7s linear infinite;
}

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

.pi-form .radio label,
.pi-form .checkbox label {
    font-weight: normal;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.pi-form-success,
.pi-form-error {
    border-radius: 4px;
    padding: 14px 18px;
    margin-bottom: 16px;
}