/* Курсы — общие стили (каталог, курс, урок, "мои курсы") */

.krs-page {
	--krs-accent: #006089;
	--krs-text: #000c2d;
	--krs-muted: #687385;
	--krs-surface: #f9f9f9;
	--krs-border: #dde4ea;
	--krs-success: #065f46;
	--krs-success-bg: #ecfdf5;
	--krs-danger: #b91c1c;
	--krs-danger-bg: #fef2f2;
	padding: 24px 0 48px;
	font-family: inherit;
	font-size: 14px;
	line-height: 1.45;
	color: var(--krs-text);
}

.krs-page * {
	box-sizing: border-box;
}

.krs-muted {
	color: var(--krs-muted);
}

.krs-breadcrumb {
	margin: 0 0 12px;
	font-size: 13px;
	color: var(--krs-muted);
}

.krs-breadcrumb a {
	color: var(--krs-accent);
	text-decoration: none;
}

.krs-breadcrumb a:hover {
	text-decoration: underline;
}

.krs-preview-banner {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 8px 16px;
	margin-bottom: 14px;
	padding: 10px 14px;
	background: rgba(0, 96, 137, 0.06);
	border: 1px solid rgba(0, 96, 137, 0.2);
	border-radius: 8px;
	font-size: 13px;
	line-height: 1.4;
	color: var(--krs-text);
}

.krs-preview-banner__text {
	flex: 1 1 220px;
}

.krs-preview-banner__link {
	flex-shrink: 0;
	color: var(--krs-accent);
	font-weight: 600;
	text-decoration: none;
	white-space: nowrap;
}

.krs-preview-banner__link:hover {
	text-decoration: underline;
}

.krs-back {
	display: inline-block;
	margin-top: 16px;
	color: var(--krs-accent);
	font-weight: 600;
	text-decoration: none;
}

.krs-back:hover {
	text-decoration: underline;
}

.krs-card {
	background: #fff;
	border: 1px solid var(--krs-border);
	border-radius: 8px;
	padding: 16px;
	margin-bottom: 12px;
}

.krs-card__title {
	font-size: 16px;
	font-weight: 600;
	margin: 0 0 10px;
}

.krs-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 6px;
	height: 42px;
	padding: 0 20px;
	box-sizing: border-box;
	background: #f9fafa;
	color: var(--krs-accent);
	border: 2px solid var(--krs-accent);
	border-radius: 4px;
	font: inherit;
	font-size: 13px;
	font-weight: 600;
	text-decoration: none;
	white-space: nowrap;
	cursor: pointer;
	transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.krs-btn:hover:not(:disabled) {
	background: var(--krs-accent);
	border-color: var(--krs-accent);
	color: #fff;
}

.krs-btn:disabled {
	opacity: 0.55;
	cursor: not-allowed;
}

.krs-btn--ghost {
	background: #fff;
	color: var(--krs-accent);
}

.krs-btn--ghost:hover:not(:disabled) {
	background: var(--krs-accent);
	color: #fff;
	border-color: var(--krs-accent);
}

.krs-btn--danger {
	background: #fff;
	color: var(--krs-danger);
	border-color: #fecdca;
}

.krs-btn--danger:hover:not(:disabled) {
	background: var(--krs-danger-bg);
	color: var(--krs-danger);
	border-color: #fecdca;
}

.krs-btn--sm {
	height: 34px;
	padding: 0 14px;
	font-size: 12px;
}

.krs-btn--primary {
	background: var(--krs-accent);
	color: #fff;
	border-color: var(--krs-accent);
}

.krs-btn--primary:hover:not(:disabled) {
	background: #004d6e;
	border-color: #004d6e;
	color: #fff;
}

.krs-btn--start {
	display: flex;
	width: 100%;
	box-sizing: border-box;
	justify-content: center;
	margin: 14px 0;
}

.krs-btn--ii {
	display: inline-block;
	height: auto;
	padding: 4px 14px;
	font-size: 13px;
	font-weight: 400;
	line-height: 1.35;
	color: #006089;
	background: #fff;
	border: 1px solid #b8d4e0;
	border-radius: 4px;
	white-space: normal;
	text-align: left;
}

.krs-btn.krs-btn--ii:hover,
a.krs-btn.krs-btn--ii:hover {
	background: #f0f7fa;
	border-color: #006089;
	color: #006089;
}

.krs-input,
.krs-textarea,
select.krs-input {
	width: 100%;
	height: 42px;
	padding: 0 12px;
	border: 1px solid var(--krs-border);
	border-radius: 4px;
	font: inherit;
	font-size: 14px;
	color: var(--krs-text);
	background: #fff;
	box-sizing: border-box;
}

select.krs-input {
	appearance: none;
	-webkit-appearance: none;
	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 d='M1 1l5 5 5-5' fill='none' stroke='%23687385' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 12px center;
	padding-right: 30px;
	cursor: pointer;
}

.krs-textarea {
	height: auto;
	padding: 10px 12px;
	resize: vertical;
	min-height: 90px;
}

.krs-input:focus,
.krs-textarea:focus {
	outline: none;
	border-color: var(--krs-accent);
	box-shadow: 0 0 0 3px rgba(0, 96, 137, 0.12);
}

.krs-field {
	margin-bottom: 12px;
}

.krs-field label {
	display: block;
	margin-bottom: 5px;
	font-weight: 600;
	font-size: 13px;
}

.krs-field-hint {
	margin: 0 0 8px;
	font-size: 12px;
	line-height: 1.4;
}

.krs-field-hint code {
	font-size: 11px;
}

.krs-field-row {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 12px;
}

.krs-error {
	color: var(--krs-danger);
	font-size: 13px;
	margin: 8px 0;
	min-height: 1px;
}

.krs-ai-limit-warn {
	color: var(--krs-danger);
	background: #fef2f2;
	border: 1px solid #fecdca;
	border-radius: 8px;
	padding: 12px 14px;
	font-size: 14px;
	font-weight: 600;
	margin: 0 0 16px;
}

.krs-auth {
	margin: 16px 0;
	padding: 14px 16px;
	border-radius: 8px;
	border: 1px solid rgba(0, 96, 137, 0.22);
	background: rgba(0, 96, 137, 0.05);
}

.krs-auth__text {
	margin: 0;
}

.krs-auth__text a {
	color: var(--krs-accent);
	font-weight: 600;
}

.krs-page-head {
	margin-bottom: 16px;
}

.krs-page-head__row {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	flex-wrap: wrap;
}

.krs-page-head__main {
	min-width: 0;
}

.krs-page__title,
.krs-page-head__title {
	margin: 0 0 6px;
	font-size: 24px;
	line-height: 1.2;
	font-weight: 700;
}

.krs-page__sub {
	margin: 0;
	color: var(--krs-muted);
}

.krs-page-head__actions {
	display: flex;
	align-items: center;
	gap: 8px;
	flex-shrink: 0;
	flex-wrap: wrap;
}

.krs-page-head__actions .krs-btn {
	height: 42px;
	padding: 0 16px;
	font-size: 13px;
	border-radius: 4px;
}

.krs-page-head__row .krs-btn--primary {
	flex-shrink: 0;
	background: var(--krs-accent);
	border-color: var(--krs-accent);
	color: #fff;
}

.krs-page-head__row .krs-btn--primary:hover {
	background: #004d6e;
	border-color: #004d6e;
	color: #fff;
}

/* --- Обложки курсов --- */

.krs-cover--teal { color: #006089; background: #e6f2f6; }
.krs-cover--blue { color: #1d4ed8; background: #dbeafe; }
.krs-cover--violet { color: #6d28d9; background: #ede9fe; }
.krs-cover--green { color: #047857; background: #ecfdf5; }
.krs-cover--orange { color: #c2410c; background: #fff7ed; }
.krs-cover--amber { color: #b45309; background: #fffbeb; }
.krs-cover--red { color: #b91c1c; background: #fef2f2; }
.krs-cover--rose { color: #be185d; background: #fce7f3; }
.krs-cover--slate { color: #475569; background: #f1f5f9; }

/* --- Каталог --- */

.krs-hub {
	--krs-accent: #006089;
	--krs-text: #000c2d;
	--krs-muted: #687385;
	--krs-hub-text: #000;
	--krs-hub-surface: #f9f9f9;
	--krs-hub-border: #dde4ea;
	--krs-hub-teal: #006089;
	--krs-hub-radius: 4px;
	max-width: 100%;
	margin: 0;
	padding: 0;
	font-family: inherit;
	font-size: 14px;
	line-height: 1.45;
	color: var(--krs-hub-text);
	box-sizing: border-box;
}

.krs-hub *,
.krs-hub *::before,
.krs-hub *::after {
	box-sizing: inherit;
}

.krs-hub-menu-box {
	background: #fff;
	border: 1px solid var(--krs-hub-border);
	border-radius: var(--krs-hub-radius);
	padding: 10px 12px;
	margin-bottom: 12px;
	overflow-wrap: break-word;
	word-break: break-word;
}

.krs-hub-tabs {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin: 0 0 12px;
	padding: 0;
}

.krs-hub-tab {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 38px;
	padding: 0 14px;
	border: 2px solid var(--krs-hub-border);
	border-radius: var(--krs-hub-radius);
	background: #fff;
	color: var(--krs-hub-text);
	font-size: 13px;
	font-weight: 600;
	line-height: 1.2;
	text-align: center;
	text-decoration: none !important;
	transition: border-color 0.15s, color 0.15s, background 0.15s, box-shadow 0.15s;
}

.krs-hub-tab:hover {
	border-color: var(--krs-hub-teal);
	color: var(--krs-hub-teal);
}

.krs-hub-tab.is-active {
	border-color: var(--krs-hub-teal);
	background: var(--krs-hub-teal);
	color: #fff;
}

.krs-hub-tab:focus-visible {
	outline: none;
	box-shadow: 0 0 0 2px rgba(0, 96, 137, 0.25);
}

.krs-hub-empty {
	padding: 24px 0;
	text-align: center;
}

.krs-hub-picks {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 10px;
	margin: 0;
	padding: 0;
}

.krs-hub-card {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: flex-start;
	height: 100%;
	min-width: 0;
	padding: 18px 12px 16px;
	text-decoration: none !important;
	color: var(--krs-hub-text) !important;
	background: var(--krs-hub-surface);
	border: 2px solid var(--krs-hub-border);
	border-radius: 10px;
	box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
	transition: border-color 0.15s, background 0.15s, box-shadow 0.15s, color 0.15s;
}

.krs-hub-card:hover {
	border-color: var(--krs-hub-teal);
	background: #fff;
	box-shadow: 0 4px 14px -6px rgba(0, 96, 137, 0.35);
	color: var(--krs-hub-teal) !important;
}

.krs-hub-card:focus-visible {
	outline: none;
	border-color: var(--krs-hub-teal);
	box-shadow: 0 0 0 2px var(--krs-hub-teal);
}

.krs-hub-card__icon {
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	width: 56px;
	height: 56px;
	margin-bottom: 10px;
	border-radius: 12px;
	background: #fff;
	border: 1px solid var(--krs-hub-border);
	color: var(--krs-hub-teal);
}

.krs-hub-card__icon--teal { color: #006089; }
.krs-hub-card__icon--blue { color: #1d4ed8; }
.krs-hub-card__icon--violet { color: #6d28d9; }
.krs-hub-card__icon--green { color: #047857; }
.krs-hub-card__icon--orange { color: #c2410c; }
.krs-hub-card__icon--amber { color: #b45309; }
.krs-hub-card__icon--red { color: #b91c1c; }
.krs-hub-card__icon--rose { color: #be185d; }
.krs-hub-card__icon--slate { color: #475569; }

.krs-hub-card:hover .krs-hub-card__icon {
	border-color: rgba(0, 96, 137, 0.35);
}

.krs-hub-card__svg {
	display: block;
	width: 40px;
	height: 40px;
}

.krs-hub-card__label {
	width: 100%;
	margin: 0 0 10px;
	font-size: 14px;
	font-weight: 600;
	line-height: 1.25;
	text-align: center;
	min-height: calc(1.25em * 2);
}

.krs-hub-card__desc {
	display: flex;
	flex-direction: column;
	align-items: center;
	width: 100%;
	font-size: 12px;
	font-weight: 400;
	line-height: 1.35;
	text-align: center;
	color: #687385;
}

.krs-hub-card__text {
	display: -webkit-box;
	width: 100%;
	min-height: calc(1.35em * 3);
	margin: 0;
	-webkit-line-clamp: 3;
	-webkit-box-orient: vertical;
	overflow: hidden;
	text-overflow: ellipsis;
}

.krs-hub-card__meta {
	margin-top: 6px;
	font-weight: 600;
}

.krs-hub-card:hover .krs-hub-card__desc {
	color: #687385;
}

@media screen and (max-width: 900px) {
	.krs-hub-picks {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media screen and (max-width: 520px) {
	.krs-hub-picks {
		grid-template-columns: 1fr;
	}

	.krs-hub-tab {
		flex: 1 1 calc(50% - 4px);
		min-width: 0;
	}

	.krs-page-head__actions {
		width: 100%;
	}

	.krs-page-head__actions .krs-btn {
		flex: 1 1 auto;
	}

	.krs-page-head__row .krs-btn--primary {
		width: 100%;
	}
}

.krs-pagination {
	display: flex;
	gap: 6px;
	margin-top: 20px;
	flex-wrap: wrap;
}

.krs-pagination__item {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 32px;
	height: 32px;
	padding: 0 6px;
	border: 1px solid var(--krs-border);
	border-radius: 6px;
	color: var(--krs-text);
	text-decoration: none;
	font-size: 13px;
}

.krs-pagination__item.is-active {
	background: var(--krs-accent);
	border-color: var(--krs-accent);
	color: #fff;
	font-weight: 700;
}

/* --- Страница курса --- */

.krs-course-hero {
	display: flex;
	gap: 16px;
	padding: 20px;
	border-radius: 12px;
	margin-bottom: 8px;
}

.krs-course-hero__icon {
	flex-shrink: 0;
	width: 64px;
	height: 64px;
	border-radius: 14px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(255, 255, 255, 0.55);
}

.krs-course-hero__title {
	font-size: 24px;
	font-weight: 700;
	margin: 4px 0 8px;
	color: var(--krs-text);
}

.krs-course-hero__desc {
	margin: 0 0 6px;
	color: var(--krs-text);
}

.krs-course-author {
	margin: 16px 0 8px;
	padding: 14px 16px;
	border: 1px solid var(--krs-border);
	border-radius: 8px;
	background: #fff;
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.krs-course-author__line {
	margin: 0;
	font-size: 14px;
	line-height: 1.45;
	color: var(--krs-text);
}

.krs-course-author__label {
	color: var(--krs-muted);
}

.krs-course-author__name {
	font-weight: 600;
	color: var(--krs-accent);
	text-decoration: none;
}

.krs-course-author__name:hover {
	text-decoration: underline;
}

.krs-course-author__link {
	color: var(--krs-accent);
	text-decoration: none;
}

.krs-course-author__link:hover {
	text-decoration: underline;
}

.krs-course-author__about {
	font-size: 14px;
	line-height: 1.5;
	color: var(--krs-text);
}

.krs-course-author__about p {
	margin: 0 0 8px;
}

.krs-course-author__about p:last-child {
	margin-bottom: 0;
}

.krs-course-progress {
	display: flex;
	align-items: center;
	gap: 10px;
	margin: 10px 0 4px;
}

.krs-course-progress__bar,
.krs-lesson-progress__bar {
	flex: 1;
	height: 8px;
	background: var(--krs-border);
	border-radius: 999px;
	overflow: hidden;
}

.krs-course-progress__fill,
.krs-lesson-progress__fill {
	height: 100%;
	background: var(--krs-accent);
	border-radius: 999px;
	transition: width 0.2s;
}

.krs-course-progress__label,
.krs-lesson-progress__label {
	font-size: 12px;
	color: var(--krs-muted);
	white-space: nowrap;
}

.krs-certificate {
	margin: 16px 0 4px;
}

.krs-certificate__auth {
	margin: 0;
	font-size: 14px;
	color: var(--krs-text);
}

.krs-certificate__auth a {
	color: var(--krs-accent);
	font-weight: 600;
}

.krs-certificate__input {
	display: block;
	width: 100%;
	margin-bottom: 10px;
	box-sizing: border-box;
	text-align: center;
}

.krs-certificate__btn {
	display: block;
	width: 100%;
	margin: 0;
	box-sizing: border-box;
}

.krs-certificate__btn.is-loading {
	opacity: 0.75;
	cursor: wait;
}

.krs-structure {
	margin-top: 18px;
}

.krs-structure__module {
	margin-bottom: 16px;
}

.krs-structure__module-title {
	font-size: 15px;
	font-weight: 700;
	margin: 0 0 8px;
}

.krs-structure__lessons {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 4px;
}

.krs-structure__lesson {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 9px 12px;
	border: 1px solid var(--krs-border);
	border-radius: 8px;
	background: #fff;
}

.krs-structure__lesson a {
	color: var(--krs-text);
	text-decoration: none;
	flex: 1;
}

.krs-structure__lesson a:hover {
	color: var(--krs-accent);
}

.krs-structure__lock {
	flex-shrink: 0;
	display: inline-flex;
	align-items: center;
	color: var(--krs-muted);
}

.krs-structure__lesson.is-locked a {
	color: var(--krs-muted);
}

.krs-structure__lesson-check {
	flex-shrink: 0;
	width: 22px;
	height: 22px;
	border-radius: 50%;
	background: var(--krs-surface);
	border: 1px solid var(--krs-border);
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 11px;
	color: var(--krs-muted);
}

.krs-structure__lesson.is-done {
	background: var(--krs-success-bg);
	border-color: #a7f3d0;
}

.krs-structure__lesson.is-done .krs-structure__lesson-check {
	background: var(--krs-success);
	border-color: var(--krs-success);
	color: #fff;
}

.krs-structure__lesson.is-current {
	border-color: var(--krs-accent);
}

/* --- Страница урока --- */

.krs-lesson-progress {
	display: flex;
	align-items: center;
	gap: 10px;
	margin-bottom: 16px;
}

.krs-lesson-layout {
	display: grid;
	grid-template-columns: 280px 1fr;
	gap: 24px;
	align-items: start;
	min-width: 0;
}

.krs-lesson-sidebar {
	position: sticky;
	top: 16px;
	padding-top: 18px;
}

.krs-lesson-sidebar .krs-structure {
	margin-top: 0;
}

.krs-lesson-main {
	background: #fff;
	border: 1px solid var(--krs-border);
	border-radius: 8px;
	padding: 15px 24px;
	min-width: 0;
	max-width: 100%;
}

.krs-lesson-content {
	min-width: 0;
	max-width: 100%;
}

.krs-lesson-title {
	font-size: 22px;
	font-weight: 700;
	margin: 0 0 12px;
}

.krs-lesson-content p {
	margin: 0 0 14px;
}

.krs-lesson-content__h {
	font-size: 17px;
	font-weight: 700;
	margin: 20px 0 10px;
	color: var(--krs-text, #000c2d);
}

.krs-lesson-content__h:first-child {
	margin-top: 0;
}

.krs-lesson-list {
	margin: 0 0 14px;
	padding-left: 1.35em;
}

.krs-lesson-content ul.krs-lesson-list > li {
	display: list-item;
	list-style-type: disc;
}

.krs-lesson-content ol.krs-lesson-list > li {
	display: list-item;
	list-style-type: decimal;
}

.krs-lesson-list li {
	margin: 0 0 6px;
}

.krs-lesson-list--ol {
	padding-left: 1.5em;
}

.krs-callout {
	margin: 0 0 14px;
	padding: 12px 14px;
	border: none;
	border-radius: 8px;
	background: #f9f9f9;
	font-size: 14px;
	line-height: 1.5;
}

.krs-callout__label {
	font-weight: 700;
	color: var(--krs-accent, #006089);
}

.krs-callout--tip {
	background: rgba(0, 96, 137, 0.06);
}

.krs-callout--example {
	background: #f5f3ff;
}

.krs-callout--example .krs-callout__label {
	color: #6d28d9;
}

.krs-callout--important {
	background: #fef2f2;
}

.krs-callout--important .krs-callout__label {
	color: #b91c1c;
}

.krs-callout--exam {
	background: #ecfdf5;
}

.krs-callout--exam .krs-callout__label {
	color: #065f46;
}

.krs-callout--quote {
	background: #fff;
}

.krs-lesson-content .mathml-block {
	margin: 10px 0;
	text-align: center;
}

.krs-lesson-content .mathml-block .katex-display {
	display: block;
	margin-left: auto;
	margin-right: auto;
	text-align: center;
}

/* Таблицы: прокрутка внутри обёртки, не всей страницы (перебивает #dle-content table из style.css) */
.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap {
	display: block;
	width: 100%;
	max-width: 100%;
	overflow-x: auto;
	margin: 0 0 14px;
	-webkit-overflow-scrolling: touch;
}

.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table,
.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table {
	display: table;
	width: 100%;
	max-width: 100%;
	overflow: visible;
	border-collapse: collapse;
	table-layout: auto;
	font-size: 14px;
	line-height: 1.45;
}

.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table thead,
.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table thead {
	display: table-header-group;
}

.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table tbody,
.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table tbody {
	display: table-row-group;
}

.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table tr,
.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table tr {
	display: table-row;
}

.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table th,
.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table td,
.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table th,
.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table td {
	display: table-cell;
	border: 1px solid var(--krs-border, #dde4ea);
	padding: 8px 10px;
	text-align: left;
	vertical-align: top;
}

.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table th,
.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table th {
	background: var(--krs-surface, #f9f9f9);
	font-weight: 600;
}

@media screen and (max-width: 720px) {
	.page-kursy #dle-content .krs-lesson-content .krs-lesson-table-wrap > table,
	.page-kursy #dle-content .krs-lesson-content table.krs-lesson-table {
		width: max-content;
		min-width: 100%;
		max-width: none;
	}
}

.krs-lesson-video {
	position: relative;
	width: 100%;
	margin: 0 0 14px;
	padding-bottom: 56.25%;
	height: 0;
	overflow: hidden;
	border-radius: 8px;
	background: #000;
}

.krs-lesson-video__iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	border: 0;
}

.krs-lesson-figure {
	margin: 0 0 14px;
	text-align: center;
}

.krs-lesson-image {
	display: inline-block;
	width: auto;
	max-width: 100%;
	height: auto;
	margin: 0 auto;
	border-radius: 8px;
	border: 1px solid var(--krs-border, #dde4ea);
	cursor: pointer;
	vertical-align: top;
}

.krs-image-lightbox {
	position: fixed;
	inset: 0;
	z-index: 10000;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 24px;
	box-sizing: border-box;
	background: rgba(0, 12, 45, 0.88);
}

.krs-image-lightbox[hidden] {
	display: none !important;
}

.krs-image-lightbox__img {
	display: block;
	max-width: min(100%, 1200px);
	max-height: calc(100vh - 48px);
	width: auto;
	height: auto;
	border-radius: 8px;
	box-shadow: 0 8px 40px rgba(0, 0, 0, 0.35);
}

.krs-image-lightbox__close {
	position: absolute;
	top: 16px;
	right: 16px;
	width: 40px;
	height: 40px;
	padding: 0;
	border: 0;
	border-radius: 8px;
	background: rgba(255, 255, 255, 0.12);
	color: #fff;
	font-size: 28px;
	line-height: 1;
	cursor: pointer;
}

.krs-image-lightbox__close:hover {
	background: rgba(255, 255, 255, 0.2);
}

body.krs-lightbox-open {
	overflow: hidden;
}

.krs-lesson-done {
	margin-top: 35px;
}

.krs-lesson-done .krs-btn--start {
	margin-top: 0;
}

.krs-lesson-complete-btn.is-completed {
	background: #ecfdf5;
	color: #065f46;
	border-color: #6ee7b7;
}

.krs-lesson-complete-btn.is-completed:hover {
	background: #d1fae5;
	border-color: #34d399;
	color: #065f46;
}

.krs-lesson-complete-btn__icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 1em;
	font-weight: 700;
	line-height: 1;
}

.krs-lesson-nav {
	display: flex;
	align-items: stretch;
	gap: 10px;
	width: 100%;
	margin-top: 20px;
	flex-wrap: nowrap;
}

.krs-lesson-nav--pair > * {
	flex: 1 1 0;
	min-width: 0;
	box-sizing: border-box;
}

.krs-lesson-nav--single > * {
	flex: 1 1 100%;
	width: 100%;
	min-width: 0;
	box-sizing: border-box;
}

.krs-lesson-nav--follow {
	margin-top: 10px;
}

.krs-lesson-nav a.krs-lesson-nav__btn {
	display: flex;
	flex-direction: row;
	align-items: flex-start;
	justify-content: flex-start;
	width: 100%;
	min-height: 100%;
	height: auto;
	padding: 8px 12px;
	gap: 6px;
	box-sizing: border-box;
	text-align: left;
}

.krs-lesson-nav__btn--next {
	justify-content: flex-end;
	text-align: right;
}

.krs-lesson-nav__arrow {
	flex: 0 0 auto;
	line-height: 1.35;
}

.krs-lesson-nav__label {
	flex: 1 1 auto;
	min-width: 0;
	line-height: 1.35;
}

.krs-lesson-nav__btn--next .krs-lesson-nav__label {
	text-align: right;
}

/* --- Тест --- */

.krs-quiz {
	margin: 24px 0;
	padding: 16px;
	border: 1px solid var(--krs-border);
	border-radius: 10px;
	background: var(--krs-surface);
}

.krs-quiz__title {
	font-size: 16px;
	font-weight: 700;
	margin: 0 0 12px;
}

.krs-quiz__question {
	margin-bottom: 16px;
}

.krs-quiz__question-text {
	font-weight: 600;
	margin: 0 0 8px;
}

.krs-quiz__options {
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.krs-quiz__option {
	text-align: left;
	padding: 9px 12px;
	border: 1px solid var(--krs-border);
	border-radius: 6px;
	background: #fff;
	font: inherit;
	cursor: pointer;
	transition: border-color 0.15s, background 0.15s;
}

.krs-quiz__option:hover {
	border-color: var(--krs-accent);
}

.krs-quiz__option.is-correct {
	background: var(--krs-success-bg);
	border-color: #a7f3d0;
	color: var(--krs-success);
	font-weight: 600;
}

.krs-quiz__option.is-wrong {
	background: var(--krs-danger-bg);
	border-color: #fecdca;
	color: var(--krs-danger);
}

.krs-quiz__option:disabled {
	cursor: default;
}

.krs-quiz__explanation {
	margin: 8px 0 0;
	font-size: 13px;
	color: var(--krs-muted);
}

.krs-quiz__open {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 8px;
}

.krs-quiz__open-input {
	width: 100%;
	padding: 9px 12px;
	border: 1px solid var(--krs-border);
	border-radius: 6px;
	font: inherit;
	resize: vertical;
}

.krs-quiz__open-input:disabled {
	background: var(--krs-surface);
}

.krs-quiz__open-check.is-correct,
.krs-quiz__multi-submit.is-correct {
	background: var(--krs-success-bg);
	border-color: #a7f3d0;
	color: var(--krs-success);
}

.krs-quiz__open-check.is-wrong,
.krs-quiz__multi-submit.is-wrong {
	background: var(--krs-danger-bg);
	border-color: #fecdca;
	color: var(--krs-danger);
}

.krs-quiz__answer {
	margin: 8px 0 0;
	font-size: 14px;
}

.krs-quiz__answer-label {
	font-weight: 600;
}

.krs-quiz__options--multi {
	gap: 8px;
}

.krs-quiz__multi-option {
	display: flex;
	align-items: flex-start;
	gap: 8px;
	padding: 9px 12px;
	border: 1px solid var(--krs-border);
	border-radius: 6px;
	background: #fff;
	cursor: pointer;
}

.krs-quiz__multi-option.is-correct {
	background: var(--krs-success-bg);
	border-color: #a7f3d0;
	color: var(--krs-success);
}

.krs-quiz__multi-option.is-wrong {
	background: var(--krs-danger-bg);
	border-color: #fecdca;
	color: var(--krs-danger);
}

.krs-quiz__multi-input {
	margin-top: 3px;
	flex: 0 0 auto;
}

.krs-quiz__multi-text {
	flex: 1;
}

.krs-quiz__open-check,
.krs-quiz__multi-submit {
	width: auto;
}

.krs-quiz__multi-submit {
	margin-top: 8px;
}

/* --- Мои курсы --- */

.krs-my-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.krs-my-item {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 12px;
	padding: 14px 16px;
	border: 1px solid var(--krs-border);
	border-radius: 8px;
	background: #fff;
	flex-wrap: wrap;
}

.krs-my-item__main {
	display: flex;
	flex-direction: column;
	gap: 4px;
	min-width: 0;
}

.krs-my-item__title {
	font-weight: 600;
	font-size: 15px;
}

.krs-my-item__actions {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
}

.krs-my-item__status {
	display: inline-flex;
	align-self: flex-start;
	font-size: 11px;
	font-weight: 700;
	padding: 2px 8px;
	border-radius: 999px;
	text-transform: uppercase;
	letter-spacing: 0.02em;
}

.krs-my-item__status--draft {
	background: #f1f5f9;
	color: #475569;
}

.krs-my-item__status--pending {
	background: #fef9c3;
	color: #854d0e;
}

.krs-my-item__status--published {
	background: var(--krs-success-bg);
	color: var(--krs-success);
}

.krs-my-item__status--rejected {
	background: var(--krs-danger-bg);
	color: var(--krs-danger);
}

.krs-my-item__comment {
	font-size: 12px;
	color: var(--krs-danger);
}

@media screen and (max-width: 900px) {
	.krs-field-row {
		grid-template-columns: 1fr;
	}
}

@media screen and (max-width: 720px) {
	.krs-field-row {
		grid-template-columns: 1fr;
	}

	.krs-lesson-layout {
		grid-template-columns: 1fr;
	}

	.krs-lesson-sidebar {
		position: static;
		order: 2;
	}

	.krs-course-hero {
		flex-direction: column;
	}

	.krs-my-item {
		flex-direction: column;
		align-items: flex-start;
	}
}

/* --- Документы урока --- */

.krs-lesson-content .krs-docs {
	margin-top: 24px;
}

.krs-docs {
	margin: 24px 0;
}

.krs-docs__title {
	font-size: 16px;
	font-weight: 700;
	margin: 0 0 12px;
}

.krs-docs__list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 10px;
}

.krs-docs__item {
	margin: 0;
}

.krs-docs__link {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 12px 14px;
	border: 1px solid #dde4ea;
	border-radius: 10px;
	background: #fff;
	color: #000c2d;
	text-decoration: none;
	transition: border-color .15s ease, box-shadow .15s ease;
}

.krs-docs__link:hover {
	border-color: #006089;
	box-shadow: 0 2px 10px rgba(0, 96, 137, .08);
}

.krs-docs__link .krs-docs__icon {
	flex: 0 0 auto;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	border-radius: 8px;
	color: #006089;
	background: rgba(0, 96, 137, .1);
}

.krs-docs__link .krs-docs__icon--pdf { color: #b42318; background: #fef2f2; }
.krs-docs__link .krs-docs__icon--word { color: #175cd3; background: #eff4ff; }
.krs-docs__link .krs-docs__icon--sheet { color: #067647; background: #ecfdf3; }
.krs-docs__link .krs-docs__icon--slide { color: #b54708; background: #fff6ed; }
.krs-docs__link .krs-docs__icon--archive { color: #6941c6; background: #f4f3ff; }
.krs-docs__link .krs-docs__icon--text { color: #344054; background: #f2f4f7; }
.krs-docs__link .krs-docs__icon--file { color: #475467; background: #f2f4f7; }

.krs-docs__type {
	display: block;
	font-size: 11px;
	font-weight: 700;
	line-height: 1;
	letter-spacing: 0.02em;
}

.krs-docs__meta {
	display: flex;
	flex-direction: column;
	gap: 2px;
	min-width: 0;
}

.krs-docs__name {
	font-size: 14px;
	font-weight: 600;
	line-height: 1.35;
	word-break: break-word;
}

.krs-docs__size {
	font-size: 12px;
	color: #687385;
}

/* --- Задачи по теме (как 4ЕГЭ онлайн, без теории) --- */

.krs-lesson-content .krs-tasks {
	margin-top: 24px;
}

.krs-tasks {
	margin: 24px 0;
}

.krs-tasks__title {
	font-size: 16px;
	font-weight: 700;
	margin: 0 0 12px;
}

.krs-tasks__item {
	margin-bottom: 16px;
}

.krs-tasks__item:last-child {
	margin-bottom: 0;
}

.krs-tasks__label {
	margin: 0 0 8px;
	font-size: 13px;
	font-weight: 600;
	color: var(--krs-muted);
}

.krs-tasks .vpr-online-content-card {
	background: #fff;
	border: 1px solid var(--krs-border);
	border-radius: 8px;
	padding: 16px;
	margin: 0;
	min-width: 0;
	overflow-x: auto;
}

.krs-tasks .vpr-online-problem-text {
	font-size: 14px;
	line-height: 1.55;
	overflow-wrap: break-word;
	word-break: break-word;
}

.krs-tasks .vpr-online-problem-text img,
.krs-tasks .vpr-online-content-card img {
	max-width: 100%;
	height: auto;
	border-radius: 4px;
}

.krs-tasks .vpr-online-details {
	margin: 14px 0 0;
	border: 1px solid var(--krs-border);
	border-radius: 8px;
	background: #fff;
	overflow: hidden;
}

.krs-tasks .vpr-online-problem-text + .vpr-online-solution.vpr-online-details {
	margin-top: 20px;
}

.krs-tasks .vpr-online-details__summary {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 10px;
	cursor: pointer;
	padding: 10px 14px;
	font-size: 14px;
	font-weight: 400;
	list-style: none;
	color: var(--krs-text);
	user-select: none;
}

.krs-tasks .vpr-online-details__summary::-webkit-details-marker {
	display: none;
}

.krs-tasks .vpr-online-details__summary::after {
	content: "";
	width: 6px;
	height: 6px;
	border-right: 2px solid var(--krs-accent);
	border-bottom: 2px solid var(--krs-accent);
	transform: rotate(-45deg);
	transition: transform 0.2s;
	flex-shrink: 0;
}

.krs-tasks .vpr-online-details[open] .vpr-online-details__summary::after {
	transform: rotate(135deg);
	margin-top: 2px;
}

.krs-tasks .vpr-online-details__summary:hover {
	background: rgba(0, 96, 137, 0.06);
}

.krs-tasks .vpr-online-details__body {
	padding: 12px 14px 14px;
	border-top: 1px solid var(--krs-border);
	font-size: 14px;
	line-height: 1.55;
	overflow-wrap: break-word;
}

.krs-tasks .vpr-online-details__body table,
.krs-tasks .vpr-online-problem-text table {
	display: block;
	width: 100%;
	max-width: 100%;
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
}

.krs-lesson-lock {
	margin: 4px 0 16px;
}

.krs-lesson-lock.plus-landing {
	font-size: inherit;
	line-height: inherit;
}

.krs-lesson-lock .vpr-online-payment {
	margin-top: 0;
}

.krs-lesson-lock .plus-landing__payment .vpr-online-payment__grid {
	grid-template-columns: 1fr;
}