/* ==========================================================================
   RS Pixel — landing page stylesheet (EN + RU pages share this file)
   Clean product look: white ground, ocean blue primary, coral accents.
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f6fa;
  --ink: #0f172a;
  --muted: #46536b;
  --primary: #2456d6;
  --primary-deep: #1a3fa0;
  --accent: #ef6a4d;          /* decorative only — fails AA as text on white */
  --accent-text: #c14a2e;     /* AA-safe accent for text */
  --line: #e4e8f0;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

img, svg { max-width: 100%; height: auto; display: block; }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-weight: 800;
  line-height: 1.12;
  color: var(--ink);
  letter-spacing: -0.015em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); text-wrap: balance; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); margin-bottom: 0.45em; text-wrap: balance; }
h3 { font-size: 1.12rem; margin-bottom: 0.35em; letter-spacing: 0; }

p { color: var(--muted); }

a { color: var(--primary); }

/* --- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-block;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border-radius: 12px;
  padding: 14px 28px;
  transition: transform 0.12s ease, background 0.12s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(36, 86, 214, 0.28);
}

.btn-primary:hover { background: var(--primary-deep); }

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-small { padding: 10px 20px; font-size: 0.92rem; }

/* --- Header ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-row {
  display: flex;
  align-items: center;
  gap: 26px;
  min-height: 66px;
}

.brand {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark { flex: none; }

.site-nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a:hover { color: var(--primary); }

.header-cta { white-space: nowrap; }

.lang-menu { position: relative; }

.lang-menu summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 14px;
  white-space: nowrap;
}

.lang-menu summary::-webkit-details-marker { display: none; }

.lang-menu summary::after { content: " ▾"; font-size: 0.75em; }

.lang-menu summary:hover { border-color: var(--primary); }

.lang-list {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.14);
  padding: 8px;
  display: flex;
  flex-direction: column;
  min-width: 172px;
  z-index: 30;
}

.lang-list a {
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 500;
}

.lang-list a:hover { background: var(--bg-soft); color: var(--primary); }

/* --- Hero -------------------------------------------------------------- */
.hero { padding: 76px 0 88px; overflow: hidden; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 11fr) minmax(0, 10fr);
  gap: 56px;
  align-items: center;
}

.hero-kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 18px;
}

.hero p.lede {
  font-size: 1.16rem;
  margin: 22px 0 10px;
  max-width: 33em;
}

.hero p.lede strong { color: var(--ink); }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0 16px;
}

.hero-meta { font-size: 0.95rem; color: var(--muted); }

.hero-art svg {
  width: 100%;
  filter: drop-shadow(0 26px 44px rgba(15, 23, 42, 0.16));
}

/* --- Section rhythm ---------------------------------------------------- */
.section { padding: 80px 0; scroll-margin-top: 76px; }

.section.alt { background: var(--bg-soft); }

.section-head {
  max-width: 660px;
  margin-bottom: 46px;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 10px;
}

.section-head p { font-size: 1.05rem; }

/* --- Steps (How it works) ---------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
  list-style: none;
}

.steps li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 22px 22px;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 1.05rem;
  margin-bottom: 14px;
}

.steps p { font-size: 0.95rem; }

/* --- Feature grid ------------------------------------------------------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 22px;
}

.section.alt .feature-card { background: #fff; }

.feature-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #e8eefc;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-card p { font-size: 0.95rem; }

/* --- CTA band ----------------------------------------------------------- */
.cta-band {
  background: linear-gradient(120deg, var(--primary-deep), var(--primary));
  border-radius: 22px;
  padding: 54px 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-band h2 { color: #fff; margin-bottom: 0.2em; }

.cta-band p { color: rgba(255, 255, 255, 0.85); max-width: 34em; }

.cta-band .btn-primary {
  background: #fff;
  color: var(--primary-deep);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.cta-band .btn-primary:hover { background: #eef2ff; }

/* --- FAQ ---------------------------------------------------------------- */
.faq-list { max-width: 780px; }

.faq-list details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-list summary {
  cursor: pointer;
  padding: 18px 48px 18px 22px;
  font-weight: 700;
  color: var(--ink);
  list-style: none;
  position: relative;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 400;
}

.faq-list details[open] summary::after { content: "–"; }

.faq-list details p {
  padding: 0 22px 20px;
  font-size: 0.97rem;
}

/* --- Reviews (hidden until real reviews exist) --------------------------- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 24px;
}

.review-card blockquote { color: var(--muted); font-size: 0.97rem; }

.review-card cite {
  display: block;
  margin-top: 14px;
  font-style: normal;
  font-weight: 700;
  color: var(--ink);
  font-size: 0.92rem;
}

/* --- Real books & reviews ------------------------------------------------- */
.story-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.story-card {
  margin: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

.story-art { background: var(--bg, #f6f7f9); }
.story-art svg { display: block; width: 100%; height: auto; }

.story-card figcaption {
  padding: 14px 18px 16px;
  font-size: 0.92rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.badge-sample {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: #7a5b00;
  background: #fef3cd;
  border-radius: 6px;
  padding: 2px 8px;
}

.reviews-note {
  margin-top: 28px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  padding: 26px 24px;
  text-align: center;
}

.reviews-note h3 { margin-bottom: 8px; }
.reviews-note p {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 620px;
  margin: 0 auto;
}

/* --- Footer (site map) ---------------------------------------------------- */
.site-footer {
  padding: 48px 0 30px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: 32px 40px;
}

.f-col { display: flex; flex-direction: column; gap: 9px; align-items: flex-start; }

.f-brand strong { color: var(--ink); font-size: 1.05rem; }
.f-brand p { max-width: 240px; }

.f-col h3 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 3px;
}

.f-col a { color: var(--muted); text-decoration: none; }
.f-col a:hover { color: var(--primary, #2456d6); }
.f-col .f-cta { color: var(--primary, #2456d6); font-weight: 600; }
.f-current { color: var(--ink); font-weight: 600; }

.f-bottom {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
}

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding: 52px 0 64px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .story-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .f-brand { grid-column: 1 / -1; }
  .header-row { flex-wrap: wrap; gap: 0 14px; padding-top: 10px; padding-bottom: 10px; min-height: 0; }
  .site-nav {
    order: 4;
    flex-basis: 100%;
    overflow-x: auto;
    white-space: nowrap;
    gap: 18px;
    padding: 8px 0 4px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .site-nav::-webkit-scrollbar { display: none; }
  .header-cta { margin-left: auto; }
  .section { scroll-margin-top: 112px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  h1 { font-size: clamp(1.9rem, 8.5vw, 2.4rem); }
  .wrap { padding: 0 20px; }
  .section { padding: 54px 0; }
  .section-head { margin-bottom: 32px; }
  .steps { grid-template-columns: 1fr; gap: 16px; }
  .feature-grid { grid-template-columns: 1fr; gap: 16px; }
  /* Header stays compact but keeps the CTA — never hide the main action on phones */
  .header-row { padding: 8px 20px; gap: 0 10px; }
  .brand { font-size: 1.12rem; gap: 8px; }
  .header-cta { padding: 8px 14px; font-size: 0.85rem; }
  .lang-menu summary { padding: 5px 11px; font-size: 0.85rem; }
  .site-nav { gap: 16px; padding-top: 6px; }
  .site-nav a { font-size: 0.9rem; }
  .section { scroll-margin-top: 98px; }
  /* Thumb-friendly full-width actions */
  .hero { padding: 40px 0 56px; }
  .hero-cta { gap: 10px; }
  .hero-cta .btn { width: 100%; text-align: center; }
  .cta-band { flex-direction: column; align-items: stretch; text-align: center; padding: 38px 24px; gap: 20px; }
  .cta-band p { max-width: none; }
  .cta-band .btn { width: 100%; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
}

@media (max-width: 420px) {
  /* Icon-only brand so brand + CTA + language pill share one header row */
  .brand { font-size: 0; gap: 0; }
  .brand .brand-mark { width: 30px; height: 30px; }
}