:root {
    --pq-primary-color: #667eea;
    --pq-secondary-color: #764ba2;
    --pq-text-color: #4a5568;
    --pq-bg-color: #f7fafc;
    --pq-light-gray: #e2e8f0;
}

.persian-questionnaire-container {
    max-width: 700px;
    margin: 40px auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    overflow: hidden;
}

.pq-form {
    padding: 30px 40px;
}

.pq-form-header h2 {
    text-align: center;
    color: var(--pq-text-color);
    font-size: 1.8em;
    margin-bottom: 20px;
}

/* Progress Bar */
.pq-progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--pq-light-gray);
    border-radius: 4px;
    margin-bottom: 30px;
}

.pq-progress {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--pq-primary-color), var(--pq-secondary-color));
    border-radius: 4px;
    transition: width 0.4s ease-in-out;
}

/* Form Steps */
.pq-form-step {
    display: none;
    animation: fadeIn 0.5s;
}

.pq-form-step.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.pq-form-step h3 {
    color: var(--pq-text-color);
    font-size: 1.4em;
    margin-bottom: 20px;
}

/* Inputs */
.pq-input, .pq-textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--pq-light-gray);
    border-radius: 8px;
    margin-top: 10px;
}

.pq-other-input {
    display: none;
}

/* Options */
.pq-checkbox-group, .pq-radio-group {
    display: grid;
    gap: 10px;
}

.pq-checkbox, .pq-radio {
    display: block;
    padding: 15px;
    border: 2px solid var(--pq-light-gray);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pq-checkbox:hover, .pq-radio:hover {
    border-color: var(--pq-primary-color);
}

input[type="checkbox"], input[type="radio"] {
    display: none;
}

input[type="checkbox"]:checked + label,
input[type="radio"]:checked + label {
    background-color: var(--pq-primary-color);
    color: white;
    border-color: var(--pq-secondary-color);
}

/* Navigation */
.pq-navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.pq-btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s;
}

.pq-prev-btn {
    background-color: var(--pq-light-gray);
    color: var(--pq-text-color);
}

.pq-next-btn, .pq-submit-btn {
    background-color: var(--pq-primary-color);
    color: white;
}

.pq-submit-btn.loading {
    opacity: 0.7;
}

/* Contact Fields */
.pq-contact-fields {
    display: grid;
    gap: 20px;
}

.pq-field-group {
    display: flex;
    flex-direction: column;
}

.pq-field-label {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--pq-text-color);
    font-size: 14px;
}

.pq-optional {
    font-weight: normal;
    color: #666;
    font-style: italic;
}

.pq-field-description {
    margin-top: 5px;
    color: #666;
    font-size: 12px;
    line-height: 1.4;
}

/* Messages */
.pq-message {
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
    text-align: center;
}

.pq-success {
    background-color: #d4edda;
    color: #155724;
}

.pq-error {
    background-color: #f8d7da;
    color: #721c24;
}

.pq-return-btn {
    background-color: var(--pq-primary-color);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 15px;
    font-size: 14px;
    transition: background-color 0.3s;
}

.pq-return-btn:hover {
    background-color: var(--pq-secondary-color);
}