/* ==========================================================================
   Discussion Block — Phase 1
   BEM naming: .hta-discussion
   Matches card-based mockup design.
   ========================================================================== */

/* ---------- Container (white card) ---------- */
.hta-discussion {
	background: #ffffff;
	border: 1px solid #e5e7eb;
	border-radius: 12px;
	padding: 32px 0px;
	font-family: 'Montserrat', sans-serif;
	color: #1a1a1a;
	font-size: 15px;
	line-height: 1.5;
}

/* Course player tab — no outer card border */
.ssc-tab-pane .hta-discussion {
	border: none;
}

/* ---------- Header ---------- */
.hta-discussion__header {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	margin-bottom: 32px;
	padding: 0px 32px;
}

.hta-discussion__header-left {
	display: flex;
	align-items: center;
	gap: 12px;
}

.hta-discussion__title {
	display: flex;
	align-items: center;
	gap: 8px;
	font-size: 20px;
	font-weight: 800;
	color: #111827;
	margin: 0;
}

.hta-discussion__title-icon {
	font-size: 20px;
	line-height: 1;
	color: #b91c1c;
}

.hta-discussion__count {
	display: inline-block;
	color: #4b5563;
	font-size: 11px;
	font-weight: 700;
	white-space: nowrap;
}

.hta-discussion__sort-wrapper {
	display: flex;
	align-items: center;
	gap: 6px;
}

.hta-discussion__sort-icon {
	font-size: 14px;
	color: #9ca3af;
	letter-spacing: -1px;
}

.hta-discussion__sort-label {
	font-size: 11px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: #9ca3af;
}

.hta-discussion__sort-dropdown {
	position: relative;
}

.hta-discussion__sort-trigger {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	padding: 4px 10px;
	border: 1px solid #e5e7eb;
	border-radius: 6px;
	background: #ffffff;
	font-size: 12px;
	font-weight: 600;
	color: #374151;
	cursor: pointer;
	font-family: inherit;
	transition: border-color 0.15s, box-shadow 0.15s;
	white-space: nowrap;
}

.hta-discussion__sort-trigger:hover {
	border-color: #9ca3af;
}

.hta-discussion__sort-dropdown--open .hta-discussion__sort-trigger {
	border-color: #b91c1c;
	box-shadow: 0 0 0 2px rgba(185,28,28,0.1);
}

.hta-discussion__sort-chevron {
	font-size: 9px;
	color: #9ca3af;
	transition: transform 0.15s;
}

.hta-discussion__sort-dropdown--open .hta-discussion__sort-chevron {
	transform: rotate(180deg);
}

.hta-discussion__sort-menu {
	display: none;
	position: absolute;
	top: calc(100% + 4px);
	right: 0;
	min-width: 110px;
	background: #ffffff;
	border: 1px solid #e5e7eb;
	border-radius: 8px;
	box-shadow: 0 4px 12px rgba(0,0,0,0.10);
	padding: 4px;
	list-style: none;
	margin: 0;
	z-index: 100;
}

.hta-discussion__sort-dropdown--open .hta-discussion__sort-menu {
	display: block;
}

.hta-discussion__sort-option {
	padding: 7px 12px;
	border-radius: 6px;
	font-size: 13px;
	font-weight: 500;
	color: #374151;
	cursor: pointer;
	transition: background 0.12s, color 0.12s;
	white-space: nowrap;
}

.hta-discussion__sort-option:hover {
	background: #f3f4f6;
}

.hta-discussion__sort-option--active {
	color: #b91c1c;
	font-weight: 700;
}

/* ---------- Compose ---------- */
.hta-discussion__compose {
	margin-bottom: 32px;
	padding: 40px 20px 40px;
	background: #f9fafb;
	max-width: 100%;
	margin-left: auto;
	margin-right: auto;
}

.hta-discussion__compose-row {
	display: flex;
	align-items: center;
	gap: 12px;
}

.hta-discussion__compose-avatar {
	width: 40px;
	height: 40px;
	border-radius: 50%;
	object-fit: cover;
	flex-shrink: 0;
}

.hta-discussion__compose-field {
	position: relative;
	flex: 1;
}

.hta-discussion__textarea {
	display: block;
	width: 100%;
	padding: 10px 18px;
	background: #f3f4f6;
	border: 1px solid transparent;
	border-radius: 9999px;
	font-size: 14px;
	font-family: inherit;
	line-height: 1.5;
	transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
	box-sizing: border-box;
	color: #1a1a1a;
}

.hta-discussion__textarea::placeholder {
	color: #9ca3af;
}

.hta-discussion__textarea:focus {
	outline: none;
	border-color: rgba(185, 28, 28, 0.3);
	box-shadow: 0 0 0 2px rgba(185, 28, 28, 0.06);
	background: #fff;
}

.hta-discussion__compose-actions {
	display: flex;
	justify-content: flex-end;
	gap: 8px;
}

.hta-discussion__char-count {
	font-size: 12px;
	color: #9ca3af;
}

/* ---------- Buttons ---------- */
.hta-discussion__btn {
	cursor: pointer;
	border: none;
	font-family: inherit;
	transition: opacity 0.2s, background 0.2s;
}

.hta-discussion__btn:disabled {
	opacity: 0.5;
	cursor: not-allowed;
}

.hta-discussion__btn--primary {
	background: #b91c1c;
	color: #fff;
	padding: 8px 24px;
	border-radius: 9999px;
	font-size: 13px;
	font-weight: 700;
	white-space: nowrap;
	flex-shrink: 0;
}

.hta-discussion__btn--primary:hover:not(:disabled) {
	opacity: 0.9;
}

.hta-discussion__btn--ghost {
	background: none;
	color: #6b7280;
	padding: 4px 8px;
	font-size: 13px;
	border-radius: 4px;
}

.hta-discussion__btn--ghost:hover {
	color: #b91c1c;
	background: rgba(185, 28, 28, 0.06);
}

/* ---------- Login Prompt ---------- */
.hta-discussion__login-prompt {
	text-align: center;
	padding: 20px;
	background: #f9fafb;
	border-radius: 12px;
	border: 1px dashed #d1d5db;
}

.hta-discussion__login-prompt a {
	color: #2563eb;
	font-weight: 600;
	text-decoration: none;
}

.hta-discussion__login-prompt a:hover {
	text-decoration: underline;
}

/* ---------- Loading ---------- */
.hta-discussion__loading {
	text-align: center;
	padding: 32px 0;
	color: #9ca3af;
}

.hta-discussion__spinner {
	display: inline-block;
	width: 20px;
	height: 20px;
	border: 2px solid #e5e7eb;
	border-top-color: #b91c1c;
	border-radius: 50%;
	animation: hta-discussion-spin 0.6s linear infinite;
	vertical-align: middle;
	margin-right: 8px;
}

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

/* ---------- Newest Comment Divider ---------- */
.hta-discussion__new-divider {
	display: flex;
	align-items: center;
	gap: 12px;
	margin: 0 32px 4px;
	color: #9ca3af;
	font-size: 11px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.06em;
}

.hta-discussion__new-divider::before,
.hta-discussion__new-divider::after {
	content: '';
	flex: 1;
	height: 1px;
	background: #e5e7eb;
}

/* ---------- Comment ---------- */
.hta-discussion__comment {
	display: flex;
	flex-wrap: wrap;
	gap: 16px;
	padding: 12px 32px;
	margin-bottom: 0;
	border-bottom: 1px solid rgba(28, 27, 31, 0.03);
}

.hta-discussion__comment:last-child {
	border-bottom: none;
}

.hta-discussion__comment-header {
	display: flex;
	align-items: flex-start;
	gap: 16px;
	flex-shrink: 0;
}

.hta-discussion__comment-avatar {
	width: 40px;
	height: 40px;
	border-radius: 50%;
	object-fit: cover;
	flex-shrink: 0;
}

.hta-discussion__comment-body {
	flex-grow: 1;
	min-width: 0;
}

.hta-discussion__comment-meta {
	display: flex;
	align-items: center;
	gap: 8px;
	flex-wrap: wrap;
	margin-bottom: 4px;
}

.hta-discussion__author-name {
	font-weight: 800;
	font-size: 14px;
	color: #111827;
}

.hta-discussion__time {
	font-size: 11px;
	color: #9ca3af;
	font-weight: 500;
}

/* ---------- Role Badges ---------- */
.hta-discussion__badge {
	display: inline-block;
	padding: 2px 8px;
	border-radius: 8px;
	font-size: 11px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.3px;
	background: #f1f5f9;
	color: #6b7280;
}

.hta-discussion__badge--admin {
	background: #fef2f2;
	color: #dc2626;
}

.hta-discussion__badge--trainer {
	background: rgba(13, 148, 136, 0.12);
	color: #0d9488;
}

.hta-discussion__badge--member {
	background: #f1f5f9;
	color: #6b7280;
}

/* ---------- Comment Content ---------- */
.hta-discussion__content {
	font-size: 14px;
	line-height: 1.7;
	color: #4b5563;
	word-wrap: break-word;
	overflow-wrap: break-word;
}

/* ---------- "See more" truncation ---------- */
.hta-discussion__content--collapsed {
	overflow: hidden;
	display: -webkit-box;
	-webkit-line-clamp: 5;
	-webkit-box-orient: vertical;
}

.hta-discussion__see-more {
	display: inline-block;
	background: none;
	border: none;
	padding: 0;
	margin-top: 4px;
	color: #6b7280;
	font-size: 14px;
	font-weight: 600;
	font-family: inherit;
	cursor: pointer;
	line-height: 1.5;
}

.hta-discussion__see-more:hover {
	color: #1a1a1a;
	text-decoration: underline;
}

/* ---------- @Mention ---------- */
.hta-discussion__mention {
	color: #b91c1c;
	font-weight: 600;
	cursor: default;
}

/* ---------- Comment Actions ---------- */
.hta-discussion__actions {
	display: flex;
	align-items: center;
	gap: 12px;
	margin-top: 8px;
}

.hta-discussion__action {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	background: none;
	border: none;
	color: #6b7280;
	font-size: 12px;
	font-weight: 700;
	text-transform: uppercase;
	cursor: pointer;
	padding: 4px 0;
	transition: color 0.15s;
}

.hta-discussion__action:hover {
	color: #b91c1c;
}

.hta-discussion__action--liked {
	color: #b91c1c;
	font-weight: 700;
}

.hta-discussion__action--liked .hta-discussion__like-icon {
	color: #b91c1c;
	font-variation-settings: 'FILL' 1;
}

.hta-discussion__like-icon {
	font-size: 16px;
	line-height: 1;
	vertical-align: middle;
	transition: color 0.15s, font-variation-settings 0.15s;
}

.hta-discussion__action--delete {
	color: #ef4444;
}

.hta-discussion__action--delete:hover {
	color: #dc2626;
}

/* ---------- Replies (threaded) ---------- */
.hta-discussion__replies {
	width: 100%;
	margin-left: 8px;
	padding-left: 24px;
	border-left: 1px solid rgba(28, 27, 31, 0.08);
	margin-top: 0;
}

.hta-discussion__replies .hta-discussion__comment {
	padding: 12px 0;
	border-bottom: none;
	margin-bottom: 0;
}

.hta-discussion__replies .hta-discussion__comment-avatar {
	width: 32px;
	height: 32px;
}

/* Depth 2 replies */
.hta-discussion__replies .hta-discussion__replies {
	margin-left: 8px;
	border-left-color: rgba(28, 27, 31, 0.05);
}

/* Reply actions smaller text at depth 1+ */
.hta-discussion__replies .hta-discussion__actions .hta-discussion__action {
	font-size: 11px;
	letter-spacing: 0.04em;
}

/* ---------- Thread Collapse ---------- */
.hta-discussion__collapse-toggle {
	width: 100%;
	background: none;
	border: none;
	color: #b91c1c;
	font-size: 12px;
	font-weight: 700;
	cursor: pointer;
	padding: 8px 0;
	margin-left: 8px;
	display: flex;
	align-items: center;
	gap: 4px;
	font-family: inherit;
}

.hta-discussion__collapse-toggle:hover {
	text-decoration: underline;
}

.hta-discussion__collapse-toggle .hta-discussion__collapse-icon {
	font-size: 16px;
	line-height: 1;
	vertical-align: middle;
}

/* ---------- Inline Reply Form ---------- */
.hta-discussion__reply-form {
	position: relative;
	margin-top: 12px;
	box-sizing: border-box;
}

.hta-discussion__reply-row {
	display: flex;
	align-items: center;
	gap: 10px;
}

.hta-discussion__reply-form-avatar {
	width: 32px;
	height: 32px;
	border-radius: 50%;
	object-fit: cover;
	flex-shrink: 0;
	opacity: 0.55;
	border: 1px solid rgba(0, 0, 0, 0.08);
}

.hta-discussion__replies .hta-discussion__reply-form {
	margin-left: 0;
}

.hta-discussion__reply-input {
	display: block;
	width: 100%;
	padding: 7px 16px;
	background: #f3f4f6;
	border: 1px solid transparent;
	border-radius: 9999px;
	font-size: 12px;
	font-family: inherit;
	color: #1a1a1a;
	box-sizing: border-box;
	transition: border-color 0.2s, box-shadow 0.2s;
}

.hta-discussion__reply-input::placeholder {
	color: #9ca3af;
}

.hta-discussion__reply-input:focus {
	outline: none;
	border-color: rgba(185, 28, 28, 0.3);
	box-shadow: 0 0 0 2px rgba(185, 28, 28, 0.06);
	background: #fff;
}

.hta-discussion__reply-form .hta-discussion__compose-actions {
	display: flex;
	align-items: center;
	gap: 8px;
	flex-shrink: 0;
}

.hta-discussion__reply-form .hta-discussion__avatar {
	width: 30px;
	height: 30px;
}

/* ---------- @Mention Dropdown ---------- */
.hta-discussion__mention-dropdown {
	position: absolute;
	left: 0;
	right: 0;
	background: #fff;
	border: 1px solid #d1d5db;
	border-radius: 8px;
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
	max-height: 200px;
	overflow-y: auto;
	z-index: 100;
}

.hta-discussion__mention-item {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 8px 12px;
	cursor: pointer;
	transition: background 0.1s;
}

.hta-discussion__mention-item:hover,
.hta-discussion__mention-item--active {
	background: #f0f7ff;
}

.hta-discussion__mention-item img {
	width: 28px;
	height: 28px;
	border-radius: 50%;
}

.hta-discussion__mention-item-name {
	font-size: 14px;
	font-weight: 500;
}

.hta-discussion__mention-item-login {
	font-size: 12px;
	color: #9ca3af;
}

/* ---------- Load More ---------- */
.hta-discussion__load-more {
	margin-top: 40px;
	padding-top: 32px;
	border-top: 1px solid #f3f4f6;
	text-align: center;
}

.hta-discussion__load-more-link {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	background: none;
	border: none;
	color: #3b82f6;
	font-size: 13px;
	font-weight: 700;
	cursor: pointer;
	font-family: inherit;
	transition: opacity 0.15s;
}

.hta-discussion__load-more-link:hover {
	text-decoration: underline;
}

.hta-discussion__load-more-link:disabled {
	opacity: 0.6;
	cursor: default;
	text-decoration: none;
}

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

.hta-discussion__load-more-spinner {
	display: none;
	width: 14px;
	height: 14px;
	border: 2px solid rgba(59,130,246,0.25);
	border-top-color: #3b82f6;
	border-radius: 50%;
	animation: hta-spin 0.65s linear infinite;
	flex-shrink: 0;
}

.hta-discussion__load-more-link--loading .hta-discussion__load-more-spinner {
	display: block;
}

/* ---------- Empty State ---------- */
.hta-discussion__empty {
	text-align: center;
	padding: 32px 16px;
	color: #9ca3af;
}

.hta-discussion__empty-icon {
	font-size: 40px;
	margin-bottom: 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
	.hta-discussion {
		padding: 20px 16px;
		border-radius: 8px;
	}

	.hta-discussion__header {
		flex-direction: column;
		align-items: flex-start;
		gap: 12px;
	}

	.hta-discussion__comment {
		gap: 12px;
	}

	.hta-discussion__replies {
		margin-left: 4px;
		padding-left: 12px;
	}

	.hta-discussion__reply-form {
		margin-left: 0;
	}

	.hta-discussion__collapse-toggle {
		margin-left: 4px;
	}
}

/* ── Preview mode: hide all interactive controls ── */
.hta-discussion--preview #hta-discussion-compose,
.hta-discussion--preview .hta-discussion__login-prompt,
.hta-discussion--preview .hta-discussion__actions,
.hta-discussion--preview .hta-discussion__reply-form,
.hta-discussion--preview .hta-discussion__collapse-toggle {
	display: none !important;
}