/* Course Q&A — Static styles (extracted from inline) */
.tutor-bricks-course-qna .tb-qna-float-btn {
    position: fixed;
    top: calc(50% + var(--tb-course-float-offset, 0px));
    transform: translateY(-50%);
    z-index: 9998;
    writing-mode: vertical-lr;
    text-orientation: mixed;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 10px;
    color: var(--tutor-text-primary-inverse, #fff);
    background: var(--tutor-button-primary, var(--tutor-color-primary, #3e64de));
    border: 0;
    cursor: pointer;
    font: inherit;
    font-weight: 600;
    line-height: 1;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
    /* Dynamic via CSS vars */
    left: var(--tb-qna-pos-left, auto);
    right: var(--tb-qna-pos-right, auto);
    border-radius: var(--tb-qna-border-radius, 8px 0 0 8px);
}

.tutor-bricks-course-qna .tb-qna-float-btn:hover {
    filter: brightness(1.1);
}

.tutor-bricks-course-qna .tb-qna-btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: none;
    width: 1em;
    height: 1em;
    transform: rotate(90deg);
    font-size: 16px;
    line-height: 1;
}

.tutor-bricks-course-qna .tb-qna-btn-icon > *,
.tutor-bricks-course-qna .tb-qna-btn-icon svg {
    width: 100%;
    height: 100%;
}

.tutor-bricks-course-qna .tb-qna-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.tutor-bricks-course-qna .tb-qna-overlay.tb-open {
    opacity: 1;
    visibility: visible;
}

.tutor-bricks-course-qna .tb-qna-modal {
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    width: 480px;
    max-width: 95vw;
    min-height: 0;
    /* Ignore legacy saved 80vh values from the removed Max Height control. */
    max-height: none !important;
    background: var(--tutor-surface-l1, #fff);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    /* Dynamic via CSS vars */
    left: var(--tb-qna-modal-left, auto);
    right: var(--tb-qna-modal-right, auto);
    box-shadow: var(--tb-qna-modal-shadow, -8px 0 40px rgba(0, 0, 0, 0.15));
    transform: var(--tb-qna-modal-transform, translateX(100%));
}

.tutor-bricks-course-qna .tb-qna-modal.tb-open {
    transform: translateX(0);
}

.tutor-bricks-course-qna .tb-qna-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid #e5e7eb;
    flex-shrink: 0;
}

.tutor-bricks-course-qna .tb-qna-modal-title {
    font-size: 18px;
    font-weight: 700;
    margin: 0;
}

.tutor-bricks-course-qna .tb-qna-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 20px;
    color: #6b7280;
    padding: 4px;
    border-radius: 50%;
    transition: background 0.2s;
}

.tutor-bricks-course-qna .tb-qna-close:hover {
    background: #f3f4f6;
}

.tutor-bricks-course-qna .tb-qna-modal-body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 0;
}

.tutor-bricks-course-qna .tb-qna-ask-form {
    padding: 16px 20px;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    flex-direction: column;
}

.tutor-bricks-course-qna .tb-qna-ask-form textarea {
    width: 100%;
    min-height: 60px;
    max-height: 120px;
    padding: 10px 14px;
    border: 1px solid #d1d5db;
    border-radius: 12px;
    resize: vertical;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.tutor-bricks-course-qna .tb-qna-ask-form textarea:focus {
    border-color: #3b82f6;
}

.tutor-bricks-course-qna .tb-qna-submit-btn {
    margin-top: 10px;
    padding: 8px 18px;
    background: #3b82f6;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: all 0.2s;
    align-self: flex-end;
}

.tutor-bricks-course-qna .tb-qna-submit-btn:hover {
    background: #2563eb;
}

.tutor-bricks-course-qna .tb-qna-submit-btn.is-loading {
    opacity: 0.6;
    pointer-events: none;
}

.tutor-bricks-course-qna .tb-qna-questions-list {
    padding: 0;
}

.tutor-bricks-course-qna .tb-qna-question {
    padding: 14px 20px;
    border-bottom: 1px solid #f3f4f6;
    transition: background 0.15s;
}

.tutor-bricks-course-qna .tb-qna-question:hover {
    background: #f9fafb;
}

.tutor-bricks-course-qna .tb-qna-q-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.tutor-bricks-course-qna .tb-qna-avatar {
    flex-shrink: 0;
}

.tutor-bricks-course-qna .tb-qna-avatar img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.tutor-bricks-course-qna .tb-qna-author-name {
    font-weight: 600;
    font-size: 13px;
}

.tutor-bricks-course-qna .tb-qna-time {
    font-size: 12px;
    color: #9ca3af;
}

.tutor-bricks-course-qna .tb-qna-q-text {
    font-size: 14px;
    color: #374151;
    line-height: 1.5;
    margin-bottom: 8px;
}

.tutor-bricks-course-qna .tb-qna-q-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.tutor-bricks-course-qna .tb-qna-reply-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: #f3f4f6;
    border: none;
    padding: 4px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    color: #6b7280;
    transition: all 0.2s;
}

.tutor-bricks-course-qna .tb-qna-reply-toggle:hover {
    background: #e5e7eb;
    color: #374151;
}

.tutor-bricks-course-qna .tb-qna-reply-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    color: #3b82f6;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.tutor-bricks-course-qna .tb-qna-reply-btn:hover {
    background: #eff6ff;
}

.tutor-bricks-course-qna .tb-qna-replies-wrap {
    margin-top: 10px;
    margin-left: 20px;
    border-left: 2px solid #e5e7eb;
    padding-left: 14px;
    display: none;
}

.tutor-bricks-course-qna .tb-qna-replies-wrap.tb-expanded {
    display: block;
}

.tutor-bricks-course-qna .tb-qna-reply {
    padding: 10px 0;
    border-bottom: 1px solid #f9fafb;
}

.tutor-bricks-course-qna .tb-qna-reply:last-child {
    border-bottom: none;
}

.tutor-bricks-course-qna .tb-qna-reply-text {
    font-size: 13px;
    color: #4b5563;
    line-height: 1.5;
    margin-top: 4px;
}

.tutor-bricks-course-qna .tb-qna-reply-form {
    margin-top: 8px;
    display: none;
}

.tutor-bricks-course-qna .tb-qna-reply-form.tb-expanded {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tutor-bricks-course-qna .tb-qna-reply-form textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    font-size: 13px;
    font-family: inherit;
    min-height: 40px;
    max-height: 80px;
    resize: vertical;
    outline: none;
}

.tutor-bricks-course-qna .tb-qna-reply-form textarea:focus {
    border-color: #3b82f6;
}

.tutor-bricks-course-qna .tb-qna-reply-form button {
    align-self: flex-end;
    padding: 8px 14px;
    background: #3b82f6;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.tutor-bricks-course-qna .tb-qna-empty {
    padding: 40px 20px;
    text-align: center;
    color: #9ca3af;
    font-size: 14px;
}

/* ── Pulse Ripple Animation ── */
.tutor-bricks-course-qna .tb-qna-float-btn.tb-pulse {
    --tb-qna-glow-color: rgba(59, 130, 246, 0.5);
}

.tutor-bricks-course-qna .tb-qna-float-btn.tb-pulse::before,
.tutor-bricks-course-qna .tb-qna-float-btn.tb-pulse::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--tb-qna-glow-color);
    z-index: -1;
    animation: tb-qna-ripple 2s ease-out infinite;
}

.tutor-bricks-course-qna .tb-qna-float-btn.tb-pulse::after {
    animation-delay: 0.6s;
}

@keyframes tb-qna-ripple {
    0% {
        transform: scaleX(1) scaleY(1);
        opacity: 0.5;
    }

    100% {
        transform: scaleX(2.5) scaleY(1);
        opacity: 0;
    }
}