/* База знаний: статьи, квиз, умная кнопка стора. Подключается дополнительно к styles.css. */
:root { --lv-b1: #4CAF50; --lv-b2: #2196F3; --lv-c1: #9C27B0; --kb-w: 720px; }

/* ── Полоска-анонс под шапкой (главные /ru/ и /uk/) ── */
.kb-strip {
  display: flex; align-items: center; gap: 10px; justify-content: center;
  padding: 10px 16px; background: #fff; border-bottom: 1px solid var(--line);
  color: var(--ink); text-decoration: none; font-weight: 700; font-size: 0.9rem; line-height: 1.35;
}
.kb-strip:hover { background: var(--blue-soft); }
.kb-strip-tag {
  flex: none; background: var(--blue); color: #fff; font-size: 0.68rem; font-weight: 800;
  letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 9px; border-radius: 999px;
}
.kb-strip-arrow { flex: none; color: var(--blue); font-weight: 800; }

/* ── Каркас страницы ── */
.kb { max-width: var(--kb-w); margin: 0 auto; padding: 22px 20px 96px; }
.kb-crumbs { display: flex; gap: 8px; align-items: center; font-size: 0.82rem; font-weight: 700; color: var(--sub); margin-bottom: 20px; }
.kb-crumbs a { color: var(--blue-dark); text-decoration: none; }
.kb-crumbs a:hover { text-decoration: underline; }
.kb-alt-lang {
  display: none; margin-bottom: 16px; padding: 11px 14px; border-radius: 12px;
  background: #fff; border: 1px solid var(--line); font-size: 0.9rem; font-weight: 700;
  color: var(--blue-dark); text-decoration: none;
}
.kb-alt-lang.on { display: block; }

/* ── Шапка статьи ── */
.kb-levels { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.kb-lv {
  display: inline-grid; place-items: center; min-width: 72px; height: 56px; padding: 0 14px;
  border-radius: 16px; color: #fff; font-family: 'Unbounded', sans-serif; font-weight: 700; font-size: 1.35rem;
}
.kb-lv.b1 { background: var(--lv-b1); position: relative; opacity: 0.55; }
.kb-lv.b1::after { content: ""; position: absolute; left: -6px; right: -6px; top: 50%; height: 3px; background: var(--ink); border-radius: 2px; transform: rotate(-12deg); }
.kb-lv.b2 { background: var(--lv-b2); box-shadow: 0 10px 24px rgba(33,150,243,0.35); }
.kb-lv.sm { min-width: 0; height: 28px; padding: 0 10px; border-radius: 8px; font-size: 0.78rem; opacity: 1; box-shadow: none; }
.kb-lv.sm.b1::after { display: none; }
.kb-lv.c1 { background: var(--lv-c1); }
.kb-levels svg { color: var(--ink); flex: none; }
.kb h1 { font-size: clamp(1.6rem, 6.6vw, 2.4rem); line-height: 1.16; margin-bottom: 14px; }
.kb .eyebrow { margin-bottom: 14px; }
.kb-lead { font-size: 1.08rem; line-height: 1.6; color: var(--ink); }
.kb-meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.82rem; font-weight: 600; color: var(--sub); margin-top: 14px; }

/* ── Блоки ── */
.kb h2 { font-size: clamp(1.2rem, 5vw, 1.5rem); line-height: 1.25; margin: 40px 0 14px; }
.kb-card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px; }
.kb-tldr { margin-top: 26px; box-shadow: 0 14px 34px rgba(31,60,105,0.08); }
.kb-tldr h2 { margin: 0 0 12px; font-size: 0.78rem; font-family: 'Manrope', sans-serif; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; color: var(--blue-dark); }
.kb-tldr ul { list-style: none; display: grid; gap: 12px; }
.kb-tldr li { display: grid; grid-template-columns: 26px 1fr; gap: 10px; font-size: 1rem; font-weight: 600; color: var(--ink); line-height: 1.45; }
.kb-tldr li svg { margin-top: 2px; color: var(--blue); }

.kb-steps { list-style: none; counter-reset: s; display: grid; gap: 12px; }
.kb-steps li { counter-increment: s; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px 16px 58px; position: relative; }
.kb-steps li::before {
  content: counter(s); position: absolute; left: 16px; top: 16px; width: 30px; height: 30px; border-radius: 10px;
  background: var(--blue-soft); color: var(--blue-dark); display: grid; place-items: center;
  font-family: 'Unbounded', sans-serif; font-weight: 700; font-size: 0.85rem;
}
.kb-steps b { display: block; color: var(--ink); font-size: 1rem; margin-bottom: 3px; }
.kb-steps p { font-size: 0.95rem; line-height: 1.55; }

.kb-unknown { border: 1.5px dashed #C4CEDB; background: rgba(255,255,255,0.6); }
.kb-unknown ul { list-style: none; display: grid; gap: 10px; }
.kb-unknown li { padding-left: 22px; position: relative; color: var(--ink); font-weight: 600; font-size: 0.98rem; line-height: 1.5; }
.kb-unknown li::before { content: "?"; position: absolute; left: 0; top: 0; color: var(--bad); font-weight: 800; }
.kb-unknown p { margin-top: 14px; font-size: 0.88rem; }

.kb-cases { display: grid; gap: 12px; }
.kb-case h3 { font-size: 1.02rem; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.kb-case p { font-size: 0.95rem; line-height: 1.55; }

/* ── Квиз ── */
.kb-quiz { padding: 20px; box-shadow: 0 18px 44px rgba(31,60,105,0.12); border-color: #CFE0F7; }
.kb-quiz-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.kb-quiz-tag { font-size: 0.72rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; color: var(--blue-dark); }
.kb-quiz-count { font-size: 0.82rem; font-weight: 800; color: var(--sub); }
.kb-bar { height: 6px; border-radius: 999px; background: var(--bg-1); margin: 12px 0 16px; overflow: hidden; }
.kb-bar i { display: block; height: 100%; width: 0; background: var(--lv-b2); border-radius: 999px; transition: width .35s ease; }
.kb-q { background: var(--bg-0); border-radius: 14px; padding: 18px 16px; font-size: 1.16rem; font-weight: 700; color: var(--ink); line-height: 1.5; }
.kb-gap { color: var(--blue-dark); letter-spacing: 0.04em; white-space: nowrap; }
.kb-gap.filled { letter-spacing: normal; border-bottom: 2px solid var(--lv-b2); }
.kb-opts { display: grid; gap: 10px; margin-top: 14px; }
.kb-opts button {
  display: flex; align-items: center; gap: 12px; width: 100%; min-height: 56px; padding: 10px 16px;
  border-radius: 14px; border: 1.5px solid var(--line); background: #fff; cursor: pointer; text-align: left;
  font: 700 1.05rem 'Manrope', sans-serif; color: var(--ink); -webkit-tap-highlight-color: transparent;
  transition: border-color .12s ease, background .12s ease, transform .08s ease;
}
.kb-opts button:active { transform: scale(0.985); }
.kb-opts button:hover { border-color: var(--blue); }
.kb-opts button span.k {
  flex: none; width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--line);
  display: grid; place-items: center; font-size: 0.8rem; font-weight: 800; color: var(--sub);
}
.kb-opts button.correct { background: #E1F5EE; border-color: var(--ok); color: #085041; }
.kb-opts button.correct span.k { background: var(--ok); border-color: var(--ok); color: #fff; }
.kb-opts button.wrong { background: #FAECE7; border-color: var(--bad); color: #712B13; }
.kb-opts button.wrong span.k { background: var(--bad); border-color: var(--bad); color: #fff; }
.kb-opts button[disabled] { cursor: default; }
.kb-fb { margin-top: 14px; padding: 12px 14px; border-radius: 12px; font-size: 0.95rem; line-height: 1.5; font-weight: 600; }
.kb-fb.ok { background: #E1F5EE; color: #0F6E56; }
.kb-fb.bad { background: #FAECE7; color: #993C1D; }
.kb-next {
  margin-top: 12px; width: 100%; min-height: 52px; border-radius: 14px; border: 0; cursor: pointer;
  background: var(--blue); color: #fff; font: 800 1rem 'Manrope', sans-serif; box-shadow: 0 8px 20px rgba(45,108,223,0.30);
}
.kb-next:hover { background: var(--blue-dark); }
.kb-result { text-align: center; padding: 6px 0 2px; }
.kb-score { font-family: 'Unbounded', sans-serif; font-weight: 700; font-size: 3rem; line-height: 1; color: var(--ink); }
.kb-score small { font-size: 1.3rem; color: var(--sub); font-weight: 600; }
.kb-result h3 { font-size: 1.15rem; margin: 12px 0 6px; }
.kb-result p { font-size: 0.96rem; margin-bottom: 16px; }
.kb-again { margin-top: 12px; background: none; border: 0; color: var(--blue-dark); font: 700 0.9rem 'Manrope', sans-serif; cursor: pointer; padding: 8px; }

/* ── Кнопки сторов: одна по типу устройства ── */
.kb-stores { display: grid; gap: 10px; }
.kb-store {
  display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 56px; padding: 12px 18px;
  border-radius: 14px; background: #111827; color: #fff; text-decoration: none; font-weight: 800; font-size: 1.02rem;
}
.kb-store:hover { background: #000; }
.kb-store svg { flex: none; }
.kb-web { display: block; text-align: center; font-size: 0.9rem; font-weight: 700; color: var(--blue-dark); text-decoration: none; padding: 8px; }
.os-ios .kb-store.android, .os-android .kb-store.ios { display: none; }

.kb-cta { margin-top: 40px; background: var(--blue); border-radius: 22px; padding: 28px 22px; box-shadow: 0 20px 50px rgba(45,108,223,0.35); }
.kb-cta h2 { color: #fff; margin: 0 0 8px; }
.kb-cta p { color: #DCE8FB; font-size: 0.98rem; margin-bottom: 18px; }
.kb-cta .kb-store { background: #fff; color: var(--ink); }
.kb-cta .kb-store:hover { background: #F0F4F8; }
.kb-cta .kb-web { color: #fff; opacity: 0.9; }

/* ── Даты ── */
.kb-dates { display: grid; gap: 10px; }
.kb-date { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 16px; }
.kb-date b { font-family: 'Unbounded', sans-serif; font-weight: 600; font-size: 1rem; color: var(--ink); display: block; }
.kb-date span.y { font-size: 0.8rem; color: var(--sub); font-weight: 600; }
.kb-date .lvs { display: flex; gap: 6px; }
.kb-small { font-size: 0.86rem; margin-top: 12px; }
.kb-sources { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 0.82rem; line-height: 1.6; }
.kb-sources a { color: var(--blue-dark); }

/* ── Липкая панель на мобильном ── */
.kb-sticky {
  position: fixed; left: 10px; right: 10px; bottom: calc(10px + env(safe-area-inset-bottom, 0px)); z-index: 30;
  display: flex; align-items: center; gap: 12px; padding: 10px 10px 10px 16px; border-radius: 18px;
  background: rgba(17,24,39,0.94); backdrop-filter: blur(10px); color: #fff;
  box-shadow: 0 16px 40px rgba(17,24,39,0.35); transform: translateY(140%); transition: transform .3s ease;
}
.kb-sticky.on { transform: none; }
.kb-sticky b { font-size: 0.9rem; line-height: 1.25; flex: 1; }
.kb-sticky a { flex: none; background: #fff; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 0.9rem; padding: 11px 16px; border-radius: 12px; }
@media (min-width: 900px) { .kb-sticky { display: none; } }

/* ── Список статей ── */
.kb-hub-list { display: grid; gap: 12px; margin-top: 26px; }
.kb-item { display: block; text-decoration: none; color: inherit; padding: 20px; transition: transform .12s ease, box-shadow .12s ease; }
a.kb-item:hover { box-shadow: 0 14px 34px rgba(31,60,105,0.12); transform: translateY(-1px); }
.kb-item .tag { display: inline-block; font-size: 0.7rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 9px; border-radius: 999px; background: var(--blue-soft); color: var(--blue-dark); margin-bottom: 10px; }
.kb-item h2 { font-family: 'Manrope', sans-serif; font-size: 1.12rem; font-weight: 800; line-height: 1.3; margin: 0 0 6px; letter-spacing: 0; }
.kb-item p { font-size: 0.93rem; line-height: 1.5; }
.kb-item .go { display: inline-block; margin-top: 12px; color: var(--blue-dark); font-weight: 800; font-size: 0.92rem; }
.kb-item.soon { opacity: 0.7; border-style: dashed; }
.kb-item.soon .tag { background: var(--bg-1); color: var(--sub); }

@media (min-width: 700px) {
  .kb { padding-top: 40px; }
  .kb-cases { grid-template-columns: repeat(3, 1fr); }
  .kb-stores { grid-template-columns: 1fr 1fr; }
  .kb-dates { grid-template-columns: repeat(3, 1fr); }
  .kb-date { flex-direction: column; align-items: flex-start; }
  .kb-quiz { padding: 26px; }
}

/* Длинные слова в заголовке главной не должны вылезать за экран на узких телефонах. */
.hero-grid > * { min-width: 0; }
.hero h1 { overflow-wrap: break-word; hyphens: auto; }
.kb-jump { margin-top: 18px; }

/* Свёрнутые подробности: не нагружают чтение, но остаются на странице. */
.kb-more { margin-top: 28px; border-radius: 16px; padding: 16px 18px; }
.kb-more summary { font-size: 1rem; }
.kb-more-body p { margin-top: 12px; font-size: 0.93rem; line-height: 1.55; }
.kb-more-body b { color: var(--ink); }
.kb-more-note { color: var(--ink); font-weight: 600; }
.kb-tldr { margin-top: 20px; }
.kb h2#test { margin-top: 32px; }