/* Лендинг (макет 33). Только светлая тема, плоско, без градиентов. */

.ld-body { margin: 0; background: #fff; color: #0f172a; font-family: 'Plus Jakarta Sans', system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
.ld-body *, .ld-body *::before, .ld-body *::after { box-sizing: border-box; }
.ld-wrap { max-width: 1280px; margin: 0 auto; padding: 0 72px; }

/* Кнопки */
.ld-btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 24px; border-radius: 12px; font: 700 15.5px/1.2 inherit; font-family: inherit; text-decoration: none; white-space: nowrap; transition: background .12s, border-color .12s; }
.ld-btn--primary { background: #4f46e5; color: #fff; }
.ld-btn--primary:hover { background: #4338ca; color: #fff; }
.ld-btn--secondary { background: #fff; color: #334155; border: 1px solid #cbd5e1; font-weight: 600; }
.ld-btn--secondary:hover { border-color: #94a3b8; color: #0f172a; }
.ld-btn--sm { padding: 9px 14px; border-radius: 10px; font-size: 13px; }

/* Шапка */
.ld-top { position: sticky; top: 0; z-index: 20; background: #fff; border-bottom: 1px solid #e9edf2; }
.ld-top__inner { display: flex; align-items: center; gap: 14px; padding-top: 18px; padding-bottom: 18px; }
.ld-logo { display: inline-flex; align-items: center; gap: 12px; font-size: 17px; font-weight: 800; color: #0f172a; text-decoration: none; }
.ld-logo__mark { width: 34px; height: 34px; border-radius: 10px; background: #4f46e5; color: #fff; display: grid; place-items: center; font-size: 16px; font-weight: 800; }
.ld-logo > span:last-child > span { color: #4f46e5; }
.ld-logo--dark { color: #fff; font-size: 16px; }
.ld-logo--dark > span:last-child > span { color: #a5b4fc; }
.ld-logo--dark .ld-logo__mark { width: 30px; height: 30px; border-radius: 9px; font-size: 14px; }
.ld-nav { margin-left: 48px; display: flex; gap: 28px; }
.ld-nav a { font-size: 15px; color: #475569; text-decoration: none; }
.ld-nav a:hover { color: #0f172a; }
.ld-top__actions { margin-left: auto; display: flex; gap: 10px; }

/* Оффер */
.ld-hero { background: #f6f7f9; overflow: hidden; }
.ld-hero__inner { padding-top: 80px; display: flex; flex-direction: column; align-items: center; gap: 26px; text-align: center; }
.ld-pill { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 20px; background: #fff; border: 1px solid #e2e8f0; font-size: 13.5px; color: #475569; }
.ld-pill__dot { width: 8px; height: 8px; border-radius: 50%; background: #16a34a; }
.ld-hero__title { margin: 0; max-width: 940px; font-size: 60px; line-height: 1.04; font-weight: 800; letter-spacing: -.04em; }
.ld-hero__lead { margin: 0; max-width: 680px; font-size: 19px; line-height: 1.6; color: #475569; }
.ld-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.ld-actions--left { justify-content: flex-start; }
.ld-hero__note { font-size: 13.5px; color: #94a3b8; }
.ld-hero__shots { position: relative; margin-top: 30px; width: 100%; max-width: 1100px; height: 560px; }
.ld-hero__desk { position: absolute; left: 0; top: 0; width: 92.3%; height: auto; border-radius: 18px; }
.ld-hero__phone { position: absolute; right: -20px; top: 120px; width: 258px; }

/* Скриншоты */
.ld-shot { display: block; width: 100%; height: auto; border-radius: 12px; border: 1px solid #e2e8f0; background: #fff; box-shadow: 0 24px 48px -28px rgba(15,23,42,.35); }
.ld-phone { display: block; height: auto; border-radius: 34px; box-shadow: 0 24px 48px -24px rgba(15,23,42,.55); }

/* Предметы */
.ld-subjects { background: #fff; border-bottom: 1px solid #eef1f5; }
.ld-subjects__inner { display: flex; align-items: center; gap: 22px; padding-top: 34px; padding-bottom: 34px; }
.ld-subjects__label { font-size: 14px; font-weight: 600; color: #94a3b8; white-space: nowrap; }
.ld-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.ld-chip { padding: 9px 15px; border-radius: 10px; background: #f6f7f9; border: 1px solid #e2e8f0; font-size: 14px; font-weight: 600; color: #334155; }

/* Секции */
.ld-section { padding: 88px 0; background: #fff; scroll-margin-top: 70px; }
.ld-section--muted { background: #f6f7f9; }
.ld-section--dark { background: #0f172a; }
.ld-stack { display: flex; flex-direction: column; gap: 36px; }
.ld-head { display: flex; flex-direction: column; gap: 12px; max-width: 720px; }
.ld-eyebrow { font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; color: #4f46e5; }
.ld-h2 { margin: 0; font-size: 38px; line-height: 1.12; font-weight: 800; letter-spacing: -.03em; color: #0f172a; }
.ld-lead { margin: 0; font-size: 17px; line-height: 1.6; color: #475569; }
.ld-section--dark .ld-eyebrow { color: #a5b4fc; }
.ld-section--dark .ld-h2 { color: #fff; }
.ld-section--dark .ld-lead { color: #cbd5e1; }
.ld-section--dark .ld-checks li { color: #e2e8f0; }

.ld-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.ld-step { padding: 26px; border-radius: 18px; background: #f6f7f9; display: flex; flex-direction: column; gap: 12px; }
.ld-step__num { width: 40px; height: 40px; border-radius: 12px; background: #0f172a; color: #fff; font-size: 17px; font-weight: 800; display: grid; place-items: center; }
.ld-step h3 { margin: 0; font-size: 19px; font-weight: 800; letter-spacing: -.015em; }
.ld-step p { margin: 0; font-size: 15px; line-height: 1.6; color: #475569; }
.ld-step__code { margin-top: auto; padding: 11px 14px; border-radius: 11px; background: #fff; border: 1px solid #e2e8f0; font: 13.5px 'JetBrains Mono', monospace; color: #4338ca; }

.ld-feature { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 56px; align-items: center; }
.ld-feature--flip { grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); }
.ld-feature--students { grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); }
.ld-feature__text { display: flex; flex-direction: column; gap: 20px; }
.ld-checks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.ld-checks li { display: flex; gap: 12px; font-size: 15.5px; line-height: 1.55; color: #334155; }
.ld-check { width: 22px; height: 22px; flex: none; margin-top: 1px; border-radius: 7px; background: #eef0fe; color: #4338ca; display: grid; place-items: center; }

.ld-phones { display: flex; gap: 18px; justify-content: center; align-items: flex-start; }
.ld-phones .ld-phone { width: 204px; }

.ld-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.ld-tile { padding: 24px; border-radius: 16px; border: 1px solid #e2e8f0; display: flex; flex-direction: column; gap: 9px; }
.ld-tile h3 { margin: 0; font-size: 17.5px; font-weight: 700; }
.ld-tile p { margin: 0; font-size: 14.5px; line-height: 1.6; color: #475569; }

.ld-faq { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 56px; }
.ld-faq__list { display: flex; flex-direction: column; gap: 10px; }
.ld-q { padding: 20px 22px; border-radius: 14px; background: #fff; border: 1px solid #e2e8f0; }
.ld-q[open] { border: 1.5px solid #c7d2fe; }
.ld-q summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 12px; font-size: 16.5px; font-weight: 700; }
.ld-q summary::-webkit-details-marker { display: none; }
.ld-q summary::after { content: "+"; margin-left: auto; font-size: 20px; font-weight: 400; color: #94a3b8; }
.ld-q[open] summary::after { content: "−"; }
.ld-q p { margin: 10px 0 0; font-size: 15px; line-height: 1.65; color: #475569; }

/* Подвал */
.ld-foot { background: #0b1220; padding: 44px 0; }
.ld-foot__grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: 30px; }
.ld-foot__brand { display: flex; flex-direction: column; gap: 12px; font-size: 13.5px; line-height: 1.6; color: #64748b; }
.ld-foot__col { display: flex; flex-direction: column; gap: 10px; }
.ld-foot__col strong { font-size: 13px; font-weight: 700; color: #e2e8f0; }
.ld-foot__col a { font-size: 13.5px; color: #64748b; text-decoration: none; }
.ld-foot__col a:hover { color: #cbd5e1; }

/* Простая страница в оболочке лендинга (конфиденциальность) */
.ld-page { padding: 72px 0 88px; background: #f6f7f9; }
.ld-page__inner { max-width: 640px; display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.ld-page__inner p { margin: 0; font-size: 15px; line-height: 1.65; color: #475569; }

@media (max-width: 1100px) {
    .ld-wrap { padding: 0 32px; }
    .ld-nav { margin-left: 24px; gap: 18px; }
    .ld-hero__shots { height: auto; }
    .ld-hero__desk { position: static; width: 100%; height: auto; }
    .ld-hero__phone { display: none; }
}

@media (max-width: 860px) {
    .ld-wrap { padding: 0 16px; }
    .ld-top__inner { padding-top: 12px; padding-bottom: 12px; }
    .ld-nav, .ld-hide-phone { display: none; }
    .ld-hero__inner { padding-top: 32px; gap: 18px; }
    .ld-hero__title { font-size: 32px; letter-spacing: -.03em; }
    .ld-hero__lead { font-size: 16px; }
    .ld-actions .ld-btn { flex: 1; }
    .ld-hero__shots { margin-top: 8px; display: flex; justify-content: center; }
    .ld-hero__desk { display: none; }
    .ld-hero__phone { display: block; position: static; width: 220px; margin-bottom: -60px; }
    .ld-hero { padding-bottom: 0; }
    .ld-subjects__inner { flex-direction: column; align-items: flex-start; gap: 12px; padding-top: 24px; padding-bottom: 24px; }
    .ld-section { padding: 48px 0; }
    .ld-stack { gap: 22px; }
    .ld-h2 { font-size: 26px; }
    .ld-lead { font-size: 15.5px; }
    .ld-steps, .ld-tiles, .ld-faq, .ld-feature, .ld-feature--flip, .ld-feature--students { grid-template-columns: 1fr; gap: 24px; }
    .ld-feature--flip > .ld-shot { order: 2; }
    .ld-phones { gap: 10px; }
    .ld-phones .ld-phone { width: calc((100% - 20px) / 3); border-radius: 18px; }
    .ld-foot__grid { grid-template-columns: 1fr 1fr; }
    .ld-foot__brand { grid-column: 1 / -1; }
}