/* ==========================================================================
   Smart Form Builder — Public Frontend Styles
   WCAG-accessible, responsive, mobile-first.
   ========================================================================== */

/* Variables */
:root {
    --sfb-primary:       #2271b1;
    --sfb-primary-dark:  #135e96;
    --sfb-danger:        #d63638;
    --sfb-success-bg:    #edfaef;
    --sfb-success-fg:    #00a32a;
    --sfb-error-bg:      #fef1f1;
    --sfb-error-fg:      #d63638;
    --sfb-border:        #c3c4c7;
    --sfb-border-focus:  #2271b1;
    --sfb-label:         #1d2327;
    --sfb-input-bg:      #fff;
    --sfb-input-color:   #1d2327;
    --sfb-radius:        6px;
    --sfb-transition:    .18s ease;
    --sfb-font:          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, sans-serif;
}

/* Wrap */
.sfb-form-wrap {
    font-family: var(--sfb-font);
    max-width: 720px;
    margin: 0 auto 2rem;
}

/* Messages */
.sfb-messages {
    margin-bottom: 1.25rem;
}
.sfb-message-success,
.sfb-message-error {
    padding: 14px 18px;
    border-radius: var(--sfb-radius);
    font-size: .95rem;
    font-weight: 500;
    line-height: 1.5;
}
.sfb-message-success {
    background: var(--sfb-success-bg);
    color: var(--sfb-success-fg);
    border-left: 4px solid var(--sfb-success-fg);
}
.sfb-message-error {
    background: var(--sfb-error-bg);
    color: var(--sfb-error-fg);
    border-left: 4px solid var(--sfb-error-fg);
}

/* Form */
.sfb-form {
    width: 100%;
}

/* Fields */
.sfb-fields {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.sfb-field {
    display: flex;
    flex-direction: column;
    gap: .375rem;
}

/* Labels */
.sfb-label {
    font-size: .9375rem;
    font-weight: 600;
    color: var(--sfb-label);
    line-height: 1.4;
    cursor: pointer;
}
.sfb-required {
    color: var(--sfb-danger);
    margin-left: .2em;
    font-size: 1rem;
    line-height: 1;
    aria-hidden: true;
}

/* Inputs */
.sfb-input,
.sfb-form input[type="text"],
.sfb-form input[type="email"],
.sfb-form input[type="tel"],
.sfb-form input[type="number"],
.sfb-form input[type="date"],
.sfb-form input[type="file"],
.sfb-form select,
.sfb-form textarea {
    display: block;
    width: 100%;
    padding: .65rem .875rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--sfb-input-color);
    background: var(--sfb-input-bg);
    border: 1.5px solid var(--sfb-border);
    border-radius: var(--sfb-radius);
    box-sizing: border-box;
    line-height: 1.5;
    transition: border-color var(--sfb-transition), box-shadow var(--sfb-transition);
    -webkit-appearance: none;
    appearance: none;
}

.sfb-form input:focus,
.sfb-form select:focus,
.sfb-form textarea:focus {
    outline: none;
    border-color: var(--sfb-border-focus);
    box-shadow: 0 0 0 3px rgba(34, 113, 177, .18);
}

/* Textarea */
.sfb-form textarea {
    resize: vertical;
    min-height: 100px;
}

/* Select */
.sfb-form select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23646970' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    padding-right: 2.5rem;
    cursor: pointer;
}

/* File */
.sfb-form input[type="file"] {
    padding: .5rem .875rem;
    cursor: pointer;
}
.sfb-form input[type="file"]::-webkit-file-upload-button {
    background: #f0f0f1;
    border: 1px solid var(--sfb-border);
    border-radius: 4px;
    padding: 4px 12px;
    cursor: pointer;
    font-size: .875rem;
    margin-right: 10px;
}

/* Radio & Checkbox Groups */
.sfb-radio-group,
.sfb-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.sfb-radio-label,
.sfb-checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: .5rem;
    font-size: .9375rem;
    color: var(--sfb-label);
    cursor: pointer;
    line-height: 1.5;
}

.sfb-radio,
.sfb-checkbox {
    width: 18px;
    height: 18px;
    min-width: 18px;
    margin-top: 2px;
    cursor: pointer;
    accent-color: var(--sfb-primary);
}

/* Consent */
.sfb-consent-label {
    display: flex;
    align-items: flex-start;
    gap: .65rem;
    font-size: .9375rem;
    color: var(--sfb-label);
    cursor: pointer;
    line-height: 1.5;
}
.sfb-consent-label a { color: var(--sfb-primary); }
.sfb-consent-label .sfb-checkbox { margin-top: 2px; }

/* Description */
.sfb-description {
    font-size: .85rem;
    color: #646970;
    margin: .2rem 0 0;
    line-height: 1.5;
}

/* Validation Errors */
.sfb-field-error {
    display: block;
    color: var(--sfb-error-fg);
    font-size: .85rem;
    line-height: 1.4;
    min-height: 1.2em;
}
.sfb-field.sfb-has-error .sfb-input,
.sfb-field.sfb-has-error input,
.sfb-field.sfb-has-error select,
.sfb-field.sfb-has-error textarea {
    border-color: var(--sfb-danger);
    box-shadow: 0 0 0 3px rgba(214, 54, 56, .15);
}

/* Submit Button */
.sfb-field-submit {
    margin-top: .5rem;
}
.sfb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    color: #fff;
    background: var(--sfb-primary);
    border: none;
    border-radius: var(--sfb-radius);
    cursor: pointer;
    transition: background var(--sfb-transition), transform var(--sfb-transition), box-shadow var(--sfb-transition);
    line-height: 1.4;
    min-width: 120px;
}
.sfb-btn:hover:not(:disabled) {
    background: var(--sfb-primary-dark);
    box-shadow: 0 4px 12px rgba(34, 113, 177, .3);
}
.sfb-btn:active:not(:disabled) {
    transform: translateY(1px);
}
.sfb-btn:disabled {
    opacity: .65;
    cursor: not-allowed;
}
.sfb-btn.sfb-loading::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: sfb-spin .6s linear infinite;
}

/* reCAPTCHA */
.sfb-recaptcha { margin-top: .75rem; }

/* Honeypot (visually hidden — must be accessible hidden) */
.sfb-hp-field {
    position: absolute !important;
    left: -9999px !important;
    display: none !important;
}

/* Spinner */
@keyframes sfb-spin {
    to { transform: rotate(360deg); }
}

/* === Responsive === */
@media (max-width: 600px) {
    .sfb-form-wrap { margin: 0 0 1.5rem; }

    .sfb-btn {
        width: 100%;
        justify-content: center;
    }

    .sfb-form input[type="text"],
    .sfb-form input[type="email"],
    .sfb-form input[type="tel"],
    .sfb-form input[type="number"],
    .sfb-form input[type="date"],
    .sfb-form select,
    .sfb-form textarea {
        font-size: 16px; /* prevent iOS zoom */
    }
}

/* High-contrast / forced colors support */
@media (forced-colors: active) {
    .sfb-btn { forced-color-adjust: none; }
}

/* Dark mode hint (optional, respects theme) */
@media (prefers-color-scheme: dark) {
    :root {
        --sfb-input-bg:    #1d2327;
        --sfb-input-color: #f0f0f0;
        --sfb-border:      #4a4f58;
        --sfb-label:       #f0f0f0;
    }
}