:root {
	--mk-accent: #1d4ed8;
	--mk-accent-dark: #1e40af;
	--mk-accent-soft: #e8eefc;
	--mk-ink: #0f172a;
	--mk-text: #1f2937;
	--mk-muted: #5b6577;
	--mk-line: #e5e7eb;
	--mk-bg: #ffffff;
	--mk-bg-soft: #f6f8fb;
	--mk-ok: #15803d;
	--mk-ok-soft: #e7f6ec;
	--mk-bad: #b91c1c;
	--mk-bad-soft: #fdecec;
	--mk-warn: #b45309;
	--mk-warn-soft: #fff4e5;
	--mk-radius: 10px;
	--mk-shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px -16px rgba(15, 23, 42, 0.25);
	--mk-font: "Inter", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font-family: var(--mk-font); font-size: 16px; line-height: 1.6; color: var(--mk-text); background: var(--mk-bg); overflow-x: hidden; }
img { max-width: 100%; height: auto; }
a { color: var(--mk-accent); }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid var(--mk-accent); outline-offset: 2px; }
.mk-skip { position: absolute; left: -9999px; top: 8px; background: var(--mk-ink); color: #fff; padding: 8px 14px; border-radius: 6px; z-index: 100; }
.mk-skip:focus { left: 8px; }

.mk-wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.mk-section { padding: 48px 20px; }
.mk-h1 { font-size: clamp(30px, 4vw, 44px); line-height: 1.12; color: var(--mk-ink); margin: 0 0 14px; letter-spacing: -0.01em; font-weight: 800; }
.mk-h1--lesson { font-size: clamp(24px, 3vw, 32px); }
.mk-h2 { font-size: 22px; line-height: 1.25; color: var(--mk-ink); margin: 0 0 14px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.mk-h3 { font-size: 17px; margin: 0 0 10px; color: var(--mk-ink); font-weight: 700; display: flex; align-items: center; gap: 8px; }
.mk-lead { font-size: 18px; color: var(--mk-muted); margin: 0 0 18px; max-width: 64ch; }
.mk-muted { color: var(--mk-muted); }
.mk-small { font-size: 13px; }
.mk-eyebrow { margin: 0 0 6px; font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--mk-accent); }
.mk-crumbs { font-size: 13px; color: var(--mk-muted); margin: 0 0 12px; }
.mk-crumbs a { color: var(--mk-muted); text-decoration: none; }
.mk-ico { display: inline-flex; width: 18px; height: 18px; flex: 0 0 auto; vertical-align: -3px; }
.mk-ico svg { width: 100%; height: 100%; }
.mk-prose p { margin: 0 0 12px; }
.mk-prose h2, .mk-prose h3 { color: var(--mk-ink); margin: 22px 0 8px; }
.mk-prose ul, .mk-prose ol { padding-left: 22px; }
.mk-prose--sm { font-size: 14.5px; }
.mk-link { display: inline-flex; align-items: center; gap: 6px; color: var(--mk-accent); text-decoration: none; font-weight: 600; }
.mk-link:hover { text-decoration: underline; }

.mk-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 20px; border-radius: 8px; border: 1px solid transparent; font: inherit; font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer; transition: background-color 0.15s, border-color 0.15s, color 0.15s; }
.mk-btn--primary { background: var(--mk-accent); color: #fff; }
.mk-btn--primary:hover { background: var(--mk-accent-dark); color: #fff; }
.mk-btn--outline { background: #fff; color: var(--mk-accent); border-color: var(--mk-accent); }
.mk-btn--outline:hover { background: var(--mk-accent-soft); }
.mk-btn--ghost { background: transparent; color: var(--mk-ink); border-color: var(--mk-line); }
.mk-btn--ghost:hover { background: var(--mk-bg-soft); }
.mk-btn--lg { min-height: 52px; padding: 0 26px; font-size: 16px; width: 100%; }
.mk-btn--sm { min-height: 36px; padding: 0 12px; font-size: 13.5px; }
.mk-btn--tg { background: #229ed9; color: #fff; border-color: #229ed9; width: 100%; }
.mk-btn--tg:hover { background: #1b86b9; color: #fff; }
.mk-btn[disabled], .mk-btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; }
.mk-badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin: 0 0 10px; }
.mk-badge--demo { background: var(--mk-warn-soft); color: var(--mk-warn); }
.mk-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--mk-accent); background: var(--mk-accent-soft); padding: 2px 9px; border-radius: 999px; }
.mk-notice { padding: 12px 16px; border-radius: 8px; border: 1px solid var(--mk-line); background: var(--mk-bg-soft); margin: 0 0 16px; }
.mk-notice--warn { background: var(--mk-warn-soft); border-color: #f5d9b0; color: var(--mk-warn); }

/* header / footer (theme) */
.mk-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--mk-line); }
.mk-header__in { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.mk-brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--mk-ink); font-weight: 800; font-size: 19px; letter-spacing: -0.01em; }
.mk-brand__mark { width: 36px; height: 36px; color: var(--mk-accent); display: inline-flex; flex: none; }
.mk-brand__mark svg { width: 36px; height: 36px; display: block; }
.mk-brand__word { line-height: 1.1; }
.mk-brand__word em { font-style: normal; color: var(--mk-accent); }
.mk-brand__img { height: 36px; width: auto; display: block; }
.mk-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px; }
.mk-nav a { display: inline-block; padding: 8px 14px; border-radius: 8px; text-decoration: none; color: var(--mk-text); font-weight: 600; font-size: 15px; }
.mk-nav a:hover, .mk-nav .current-menu-item > a, .mk-nav .current_page_item > a { background: var(--mk-accent-soft); color: var(--mk-accent); }
.mk-nav__toggle { display: none; }
.mk-footer { border-top: 1px solid var(--mk-line); background: var(--mk-bg-soft); padding: 40px 0 28px; margin-top: 56px; font-size: 14.5px; }
.mk-footer__grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 32px; }
.mk-footer h4 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--mk-muted); }
.mk-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.mk-footer a { color: var(--mk-text); text-decoration: none; }
.mk-footer a:hover { color: var(--mk-accent); }
.mk-footer__ws { white-space: pre-line; color: var(--mk-muted); }
.mk-footer__bottom { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--mk-line); color: var(--mk-muted); font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* home */
.mk-hero { padding: 64px 0 48px; background: linear-gradient(180deg, var(--mk-bg-soft), #fff); border-bottom: 1px solid var(--mk-line); }
.mk-hero__in { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.mk-hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.mk-hero__card { background: #fff; border: 1px solid var(--mk-line); border-radius: 14px; padding: 24px; box-shadow: var(--mk-shadow); }
.mk-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; counter-reset: s; }
.mk-steps li { display: flex; gap: 14px; align-items: flex-start; }
.mk-steps li::before { counter-increment: s; content: counter(s); flex: 0 0 34px; height: 34px; border-radius: 50%; background: var(--mk-accent); color: #fff; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; }
.mk-steps b { display: block; color: var(--mk-ink); }
.mk-steps-mini { margin: 0; padding-left: 20px; display: grid; gap: 6px; font-size: 14.5px; }
.mk-section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.mk-section__head .mk-h2 { margin: 0; font-size: 26px; }
.mk-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.mk-card { background: #fff; border: 1px solid var(--mk-line); border-radius: var(--mk-radius); overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--mk-shadow); transition: transform 0.15s, box-shadow 0.15s; }
.mk-card:hover { transform: translateY(-2px); box-shadow: 0 2px 4px rgba(15,23,42,0.06), 0 16px 32px -18px rgba(15,23,42,0.35); }
.mk-card__img { display: block; aspect-ratio: 16/9; background: var(--mk-bg-soft); }
.mk-card__img img { width: 100%; height: 100%; object-fit: cover; }
.mk-card__body { padding: 20px 20px 18px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.mk-card__title { margin: 0; font-size: 19px; line-height: 1.3; }
.mk-card__title a { color: var(--mk-ink); text-decoration: none; }
.mk-card__title a:hover { color: var(--mk-accent); }
.mk-card__benefit { margin: 0; color: var(--mk-muted); font-size: 14.5px; flex: 1; }
.mk-meta { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13.5px; color: var(--mk-muted); }
.mk-meta li { display: inline-flex; align-items: center; gap: 6px; }
.mk-meta--big { font-size: 15px; margin-top: 8px; }
.mk-card__actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }
.mk-card__actions .mk-btn { flex: 1; min-height: 40px; font-size: 14px; }
.mk-faq { display: grid; gap: 10px; max-width: 820px; }
.mk-faq details { border: 1px solid var(--mk-line); border-radius: 8px; background: #fff; padding: 0 16px; }
.mk-faq summary { cursor: pointer; padding: 14px 0; font-weight: 600; color: var(--mk-ink); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.mk-faq summary::-webkit-details-marker { display: none; }
.mk-faq summary::after { content: "+"; color: var(--mk-accent); font-weight: 700; }
.mk-faq details[open] summary::after { content: "–"; }
.mk-faq details p { margin: 0 0 14px; color: var(--mk-muted); }
.mk-contact { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.mk-page-head { padding: 44px 0 20px; background: var(--mk-bg-soft); border-bottom: 1px solid var(--mk-line); margin-bottom: 8px; }
.mk-page-head .mk-h1 { margin-bottom: 8px; }
.mk-page { max-width: 820px; margin: 0 auto; padding: 32px 20px 60px; }

/* course page */
.mk-course-hero { background: var(--mk-bg-soft); border-bottom: 1px solid var(--mk-line); padding: 40px 0 44px; }
.mk-course-hero__grid { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 36px; align-items: start; }
.mk-access { background: #fff; border: 1px solid var(--mk-line); border-radius: 14px; padding: 22px 22px 18px; box-shadow: var(--mk-shadow); position: sticky; top: 84px; }
.mk-access__ok { display: flex; align-items: center; gap: 8px; color: var(--mk-ok); font-weight: 600; margin: 0 0 14px; }
.mk-access__includes { font-size: 13.5px; color: var(--mk-muted); margin: 14px 0 0; }
.mk-unlock__label { display: block; font-weight: 600; font-size: 14px; margin: 0 0 6px; color: var(--mk-ink); }
.mk-unlock__row { display: flex; gap: 8px; }
.mk-unlock__input { flex: 1; min-width: 0; height: 46px; padding: 0 14px; border: 1px solid #cbd2dc; border-radius: 8px; font: inherit; font-size: 16px; letter-spacing: 0.06em; text-transform: uppercase; }
.mk-unlock__input:focus { border-color: var(--mk-accent); outline: none; box-shadow: 0 0 0 3px var(--mk-accent-soft); }
.mk-unlock__error { color: var(--mk-bad); background: var(--mk-bad-soft); padding: 8px 12px; border-radius: 6px; font-size: 14px; margin: 10px 0 0; }
.mk-unlock__help { font-size: 13px; color: var(--mk-muted); margin: 10px 0 0; }
.mk-course-body { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 36px; padding-top: 36px; }
.mk-block { margin: 0 0 30px; }
.mk-block__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.mk-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.mk-list li { display: flex; gap: 10px; align-items: flex-start; }
.mk-list .mk-ico { color: var(--mk-ok); margin-top: 3px; }
.mk-module { border: 1px solid var(--mk-line); border-radius: 10px; margin: 0 0 12px; overflow: hidden; }
.mk-module__title { display: flex; align-items: center; gap: 10px; margin: 0; padding: 12px 16px; background: var(--mk-bg-soft); font-size: 16px; color: var(--mk-ink); }
.mk-module__num { width: 26px; height: 26px; border-radius: 50%; background: var(--mk-accent); color: #fff; font-size: 13px; display: inline-flex; align-items: center; justify-content: center; }
.mk-module__lessons { list-style: none; margin: 0; padding: 0; }
.mk-module__lessons li { border-top: 1px solid var(--mk-line); padding: 12px 16px; }
.mk-lesson-row { display: flex; justify-content: space-between; gap: 14px; align-items: flex-start; }
.mk-lesson-row p { margin: 2px 0 0; font-size: 14px; color: var(--mk-muted); }
.mk-lesson-row__tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; flex: 0 0 auto; }
.mk-panel { background: #fff; border: 1px solid var(--mk-line); border-radius: 12px; padding: 20px; margin: 0 0 16px; }
.mk-panel--soft { background: var(--mk-bg-soft); }
.mk-creator__name { font-weight: 700; font-size: 17px; margin: 0; color: var(--mk-ink); }
.mk-tg__note { font-size: 14px; color: var(--mk-muted); margin: 0 0 10px; }
.mk-tg__pending { font-size: 13px; color: var(--mk-muted); margin: 8px 0 0; }

/* learning */
.mk-learn__top { background: var(--mk-bg-soft); border-bottom: 1px solid var(--mk-line); }
.mk-learn__topbar { display: flex; align-items: center; justify-content: space-between; min-height: 54px; gap: 12px; }
.mk-learn__toggle { display: none; min-height: 38px; }
.mk-learn__grid { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 36px; padding-top: 28px; align-items: start; }
.mk-learn__side { position: sticky; top: 84px; max-height: calc(100vh - 100px); overflow: auto; border: 1px solid var(--mk-line); border-radius: 12px; background: #fff; padding: 8px 0 12px; }
.mk-side-module__title { display: flex; align-items: center; gap: 8px; margin: 0; padding: 12px 14px 6px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--mk-muted); }
.mk-side-module__title span { width: 20px; height: 20px; border-radius: 50%; background: var(--mk-accent-soft); color: var(--mk-accent); font-size: 11px; display: inline-flex; align-items: center; justify-content: center; }
.mk-side-module ol { list-style: none; margin: 0; padding: 0; }
.mk-side-lesson { display: block; padding: 9px 14px 9px 42px; text-decoration: none; color: var(--mk-text); font-size: 14.5px; border-left: 3px solid transparent; }
.mk-side-lesson:hover { background: var(--mk-bg-soft); }
.mk-side-lesson.is-current { background: var(--mk-accent-soft); color: var(--mk-accent); border-left-color: var(--mk-accent); font-weight: 600; }
.mk-side-help { padding: 14px 14px 0; border-top: 1px solid var(--mk-line); margin-top: 8px; }
.mk-side-help .mk-tg__note { font-size: 13px; }
.mk-learn__content { min-width: 0; padding-bottom: 60px; }
.mk-video { position: relative; aspect-ratio: 16/9; background: #000; border-radius: 12px; overflow: hidden; margin: 0 0 22px; }
.mk-video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.mk-lesson-text { margin: 0 0 26px; }
.mk-files, .mk-task, .mk-test { border-top: 1px solid var(--mk-line); padding-top: 22px; margin: 26px 0 0; }
.mk-files__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.mk-file { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 14px; border: 1px solid var(--mk-line); border-radius: 8px; background: var(--mk-bg-soft); flex-wrap: wrap; }
.mk-file__name small { color: var(--mk-muted); margin-left: 6px; }
.mk-file__actions { display: flex; gap: 8px; }
.mk-pdf { margin-top: 12px; border: 1px solid var(--mk-line); border-radius: 8px; padding: 0 12px 10px; }
.mk-pdf summary { cursor: pointer; padding: 10px 0; font-weight: 600; color: var(--mk-accent); }
.mk-pdf iframe { width: 100%; height: 70vh; border: 1px solid var(--mk-line); border-radius: 6px; background: #fff; }
.mk-task__outcome { background: var(--mk-accent-soft); color: var(--mk-ink); padding: 10px 14px; border-radius: 8px; font-size: 14.5px; }
.mk-solution { margin-top: 14px; border: 1px solid var(--mk-line); border-radius: 8px; padding: 0 14px 6px; background: var(--mk-bg-soft); }
.mk-solution summary { cursor: pointer; padding: 10px 0; font-weight: 600; color: var(--mk-accent); }
.mk-pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--mk-line); }

/* test */
.mk-q { border: 1px solid var(--mk-line); border-radius: 10px; padding: 16px 18px 10px; margin: 0 0 14px; }
.mk-q.is-missing { border-color: var(--mk-warn); }
.mk-q.is-ok { border-color: var(--mk-ok); background: var(--mk-ok-soft); }
.mk-q.is-bad { border-color: var(--mk-bad); background: var(--mk-bad-soft); }
.mk-q__text { font-weight: 600; color: var(--mk-ink); padding: 0; margin: 0 0 10px; display: flex; gap: 10px; }
.mk-q__num { flex: 0 0 26px; height: 26px; border-radius: 50%; background: var(--mk-accent-soft); color: var(--mk-accent); font-size: 13px; display: inline-flex; align-items: center; justify-content: center; }
.mk-q__opt { display: flex; align-items: flex-start; gap: 10px; padding: 8px 10px; border-radius: 6px; cursor: pointer; }
.mk-q__opt:hover { background: rgba(15,23,42,0.04); }
.mk-q__opt input { margin: 4px 0 0; accent-color: var(--mk-accent); }
.mk-q__opt.is-correct { background: var(--mk-ok-soft); outline: 1px solid var(--mk-ok); }
.mk-q__opt.is-wrong { background: var(--mk-bad-soft); outline: 1px solid var(--mk-bad); text-decoration: line-through; }
.mk-q__expl { margin: 10px 0 4px; padding: 10px 12px; background: #fff; border-left: 3px solid var(--mk-accent); font-size: 14.5px; border-radius: 0 6px 6px 0; }
.mk-test__actions { display: flex; gap: 10px; margin: 6px 0 14px; }
.mk-test__result { padding: 14px 16px; border-radius: 8px; font-size: 16px; margin-bottom: 14px; }
.mk-test__result.is-pass { background: var(--mk-ok-soft); color: var(--mk-ok); }
.mk-test__result.is-fail { background: var(--mk-bad-soft); color: var(--mk-bad); }
.mk-test__result.is-warn { background: var(--mk-warn-soft); color: var(--mk-warn); }
.mk-tg--test { margin-top: 8px; max-width: 420px; }

@media (max-width: 960px) {
	.mk-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.mk-hero__in, .mk-course-hero__grid, .mk-course-body, .mk-contact { grid-template-columns: 1fr; }
	.mk-access { position: static; }
	.mk-learn__grid { grid-template-columns: 1fr; gap: 0; padding-top: 16px; }
	.mk-learn__toggle { display: inline-flex; }
	.mk-learn__side { display: none; position: static; max-height: none; margin-bottom: 18px; }
	.mk-learn__side.is-open { display: block; }
	.mk-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
	.mk-nav__toggle { display: inline-flex; min-height: 40px; padding: 0 12px; }
	.mk-nav { display: none; position: absolute; left: 0; right: 0; top: 68px; background: #fff; border-bottom: 1px solid var(--mk-line); padding: 10px 20px 14px; }
	.mk-nav.is-open { display: block; }
	.mk-nav ul { flex-direction: column; gap: 2px; }
	.mk-cards { grid-template-columns: 1fr; }
	.mk-hero { padding: 40px 0 32px; }
	.mk-section { padding: 36px 20px; }
	.mk-footer__grid { grid-template-columns: 1fr; }
	.mk-unlock__row { flex-direction: column; }
	.mk-lesson-row { flex-direction: column; }
	.mk-lesson-row__tags { justify-content: flex-start; }
	.mk-pager { flex-direction: column; }
	.mk-pager .mk-btn { width: 100%; }
	.mk-pdf iframe { height: 60vh; }
}