/* Страница набора тестировщиков BigBoard. Крупный шрифт и высокий контраст — аудитория со слабым зрением. */
:root {
  --brand-1: #3F51B5;
  --brand-2: #1565C0;
  --amber: #FFCA28;
  --amber-ink: #1A1400;
  --bg: #F4F6FB;
  --card: #FFFFFF;
  --ink: #0F1530;
  --muted: #434A66;
  --line: #D9DFEE;
  --soft: #E8EDFB;
  --ok: #17803A;
  --ok-bg: #E3F5E8;
  --link: #1846B5;
  --shadow: 0 10px 30px rgba(21, 40, 110, .10);
  --radius: 22px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0C1122;
    --card: #151C34;
    --ink: #F3F5FB;
    --muted: #B9C0D8;
    --line: #2A3352;
    --soft: #1D2747;
    --ok: #5FD685;
    --ok-bg: #12301E;
    --link: #8DB2FF;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", Roboto, "Noto Sans", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  font-size: 20px;
  line-height: 1.55;
}

a { color: var(--link); }
a:focus-visible, button:focus-visible { outline: 4px solid var(--amber); outline-offset: 3px; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }

/* ── Шапка-герой ─────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-1) 0%, var(--brand-2) 100%);
  padding: 22px 0 64px;
}

.hero::after {
  /* Декоративные «клавиши» на фоне */
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 360px;
  height: 360px;
  background:
    linear-gradient(#fff, #fff) 0 0 / 160px 160px no-repeat,
    linear-gradient(#fff, #fff) 196px 0 / 160px 160px no-repeat,
    linear-gradient(#fff, #fff) 0 196px / 160px 160px no-repeat,
    linear-gradient(#fff, #fff) 196px 196px / 160px 160px no-repeat;
  opacity: .07;
  border-radius: 40px;
  transform: rotate(-12deg);
  pointer-events: none;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 24px;
  letter-spacing: .2px;
  color: #fff;
  text-decoration: none;
}

.brand img { width: 44px; height: 44px; border-radius: 12px; box-shadow: 0 4px 14px rgba(0,0,0,.25); }

.lang {
  color: #fff;
  font-weight: 600;
  font-size: 18px;
  text-decoration: none;
  padding: 10px 16px;
  border: 2px solid rgba(255,255,255,.55);
  border-radius: 999px;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}

.lang:hover { background: rgba(255,255,255,.12); }

.eyebrow {
  display: inline-block;
  background: var(--amber);
  color: var(--amber-ink);
  font-weight: 700;
  font-size: 17px;
  padding: 6px 14px;
  border-radius: 999px;
  margin: 0 0 18px;
}

.hero h1 {
  font-size: clamp(34px, 7vw, 54px);
  line-height: 1.12;
  margin: 0 0 18px;
  letter-spacing: -.5px;
  max-width: 14em;
}

.hero p.lead {
  font-size: clamp(20px, 3.4vw, 24px);
  margin: 0 0 28px;
  max-width: 34em;
  color: rgba(255,255,255,.94);
}

.hero .meta {
  margin: 16px 0 0;
  font-size: 18px;
  color: rgba(255,255,255,.88);
}

/* ── Кнопки ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 60px;
  padding: 14px 28px;
  border-radius: 16px;
  font: inherit;
  font-weight: 700;
  font-size: 21px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition: transform .08s ease, filter .15s ease;
}

.btn:active { transform: translateY(1px) scale(.99); }
.btn:hover { filter: brightness(1.06); }

.btn-amber { background: var(--amber); color: var(--amber-ink); box-shadow: 0 6px 18px rgba(0,0,0,.18); }
.btn-blue { background: linear-gradient(135deg, var(--brand-1), var(--brand-2)); color: #fff; }
.btn-ghost { background: var(--soft); color: var(--ink); }

.btn svg { width: 26px; height: 26px; flex: none; }

/* ── Секции ──────────────────────────────────────────────── */
main { padding-bottom: 40px; }

section { padding: 44px 0 8px; }

h2 {
  font-size: clamp(28px, 5vw, 36px);
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -.3px;
}

.intro { color: var(--muted); margin: 0 0 26px; font-size: 20px; }

/* Шаги */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }

.step {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.step .num {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
}

.step h3 { margin: 4px 0 8px; font-size: 25px; line-height: 1.25; }
.step p { margin: 0 0 16px; color: var(--muted); }
.step ul { margin: 0; padding-left: 22px; color: var(--muted); }
.step li + li { margin-top: 10px; }
.step b, .step strong { color: var(--ink); }

.done-badge {
  display: none;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ok);
}

.step.done { border-color: var(--ok); }
.step.done .num { background: var(--ok); }
.step.done .done-badge { display: inline-flex; }

/* Просьба про 14 дней */
.callout {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  align-items: start;
  background: var(--soft);
  border-radius: var(--radius);
  padding: 22px;
  border-left: 8px solid var(--amber);
}

.callout .ico { font-size: 40px; line-height: 1; }
.callout h3 { margin: 0 0 6px; font-size: 23px; }
.callout p { margin: 0; color: var(--muted); }

/* Возможности */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }

.feature {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.feature .ico {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 28px;
  background: var(--soft);
  margin-bottom: 12px;
}

.feature h3 { margin: 0 0 6px; font-size: 22px; line-height: 1.25; }
.feature p { margin: 0; color: var(--muted); font-size: 19px; }

/* Вопросы */
.faq { display: grid; gap: 12px; }

.faq details {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 18px;
  padding: 0 20px;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 21px;
  padding: 18px 36px 18px 0;
  position: relative;
  min-height: 60px;
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 30px;
  font-weight: 400;
  color: var(--link);
}

.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 18px; color: var(--muted); }

/* Поделиться */
.share {
  margin-top: 44px;
  text-align: center;
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 22px;
  box-shadow: var(--shadow);
}

.share h2 { margin-bottom: 8px; }
.share p { color: var(--muted); margin: 0 0 20px; }

footer {
  padding: 30px 0 46px;
  color: var(--muted);
  font-size: 18px;
  text-align: center;
}

footer a { margin: 0 8px; }

/* Выбор языка на корневой странице */
.chooser { display: grid; gap: 16px; margin-top: 8px; max-width: 520px; }
.chooser .btn { width: 100%; font-size: 24px; min-height: 72px; }

@media (max-width: 560px) {
  body { font-size: 19px; }
  .step { grid-template-columns: 1fr; gap: 12px; padding: 20px; }
  .step .num { width: 54px; height: 54px; font-size: 28px; border-radius: 16px; }
  .step .btn, .hero .btn, .share .btn { width: 100%; }
  .callout { grid-template-columns: 1fr; }
  .topbar { margin-bottom: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}