/* ============================================================
   Секретарь24 — лендинг. Дизайн-система наследует кабинет:
   тёмная тема zinc + оранжево-янтарные акценты.
   ============================================================ */

:root {
  --bg:        #09090b;
  --bg-soft:   #111113;
  --surface:   #18181b;
  --surface-2: #1f1f23;
  --border:    #27272a;
  --border-2:  #3f3f46;
  --text:      #fafafa;
  --muted:     #a1a1aa;
  --dim:       #71717a;
  --accent:    #f59e0b;
  --accent-2:  #fb923c;
  --accent-d:  #c2410c;
  --grad:      linear-gradient(135deg, #f0a830, #c27010);
  --radius:    14px;
  --container: 1140px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  padding-bottom: env(safe-area-inset-bottom);
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}
.container--narrow { max-width: 760px; }

.accent { color: var(--accent-2); }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ---------- Кнопки ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 11px 20px;
  min-height: 44px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--grad);
  color: #1a1205;
  box-shadow: 0 8px 24px -8px rgba(245, 158, 11, .5);
}
.btn--primary:hover { box-shadow: 0 12px 30px -8px rgba(245, 158, 11, .65); }
.btn--outline { border-color: var(--border-2); color: var(--text); background: transparent; }
.btn--outline:hover { border-color: var(--accent); color: var(--accent); }
.btn--ghost { color: var(--muted); }
.btn--ghost:hover { color: var(--text); }
.btn--lg { padding: 14px 28px; font-size: 16px; }
.btn--block { width: 100%; }

/* ---------- Шапка ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
  border-bottom: 1px solid transparent;
  padding-top: env(safe-area-inset-top);
}
.header.scrolled {
  background: rgba(9, 9, 11, .85);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; }
.logo__mark { width: 32px; height: 32px; filter: drop-shadow(0 4px 10px rgba(194, 112, 16, .35)); }
.logo__accent { color: var(--accent-2); }
.nav { display: flex; gap: 28px; margin-left: 12px; }
.nav a { color: var(--muted); font-weight: 500; font-size: 15px; transition: color .2s; }
.nav a:hover { color: var(--text); }
.header__actions { display: flex; gap: 10px; margin-left: auto; align-items: center; }

/* Переключатель языков (справа от auth-кнопок) */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
}
.lang-switcher a {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--dim);
  padding: 5px 11px;
  border-radius: 999px;
  transition: color .15s, background .15s;
}
.lang-switcher a:hover { color: var(--text); }
.lang-switcher a.is-active {
  color: #1a1205;
  background: var(--grad);
  box-shadow: 0 2px 6px -1px rgba(245, 158, 11, .4);
}

.burger {
  display: none;
  margin-left: auto;
  width: 42px; height: 42px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}
.burger span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: .25s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 80px 0 90px; text-align: center; overflow: hidden; }
.hero__glow {
  position: absolute;
  top: -180px; left: 50%;
  width: 900px; height: 600px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(245, 158, 11, .18), transparent 65%);
  pointer-events: none;
}
.hero__inner { position: relative; max-width: 880px; }
.hero__badge {
  display: inline-block;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero__title { font-size: clamp(32px, 6vw, 56px); font-weight: 800; letter-spacing: -.02em; }
.hero__subtitle {
  font-size: clamp(17px, 2.3vw, 19px);
  color: var(--muted);
  max-width: 680px;
  margin: 22px auto 0;
}
.hero__cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.hero__trust { font-size: 14px; color: var(--dim); margin-top: 18px; }
.hero__channels { margin-top: 44px; }
.hero__channels > span { font-size: 13px; color: var(--dim); text-transform: uppercase; letter-spacing: .1em; }
.hero__channels-list { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
.chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
}

/* ---------- Секции ---------- */
.section { padding: 84px 0; }
.section__title { font-size: clamp(26px, 4vw, 38px); letter-spacing: -.02em; text-align: center; }
.section__title--left { text-align: left; }
.section__lead {
  color: var(--muted);
  font-size: 17px;
  max-width: 640px;
  margin: 16px auto 0;
  text-align: center;
}
.section__lead--left { margin-left: 0; text-align: left; }
.eyebrow { text-align: center; }
.section--alt { background: var(--bg-soft); }

.grid { display: grid; gap: 20px; margin-top: 48px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Проблема ---------- */
.problem { background: var(--bg-soft); }
.pain {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.pain__icon { font-size: 32px; margin-bottom: 14px; }
.pain h3 { font-size: 18px; margin-bottom: 8px; }
.pain p { color: var(--muted); font-size: 15px; }
.problem__solution {
  margin-top: 36px;
  text-align: center;
  font-size: 19px;
  color: var(--text);
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}
.problem__solution strong { color: var(--accent-2); }

/* ---------- Роли ---------- */
.role-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .18s ease, border-color .18s ease;
}
.role-card:hover { transform: translateY(-4px); border-color: var(--accent-d); }
.role-card__icon {
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2);
  border-radius: 11px;
  font-size: 24px;
  margin-bottom: 14px;
}
.role-card h3 { font-size: 17px; margin-bottom: 8px; }
.role-card p { color: var(--muted); font-size: 14px; }
.roles__note { text-align: center; color: var(--muted); margin-top: 32px; }
.roles__note a { color: var(--accent-2); border-bottom: 1px solid currentColor; }

/* ---------- Как работает ---------- */
.how { background: var(--bg-soft); }
.steps { counter-reset: step; }
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  position: relative;
}
.step__num {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--grad);
  color: #1a1205;
  font-weight: 800;
  font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14px; }

/* ---------- Возможности ---------- */
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color .18s ease;
}
.feature:hover { border-color: var(--border-2); }
.feature__icon { font-size: 30px; margin-bottom: 14px; }
.feature h3 { font-size: 18px; margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: 15px; }

/* ---------- Демо-чат ---------- */
.demo { background: var(--bg-soft); }
.demo__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.demo .eyebrow { text-align: left; }
.chat-mock {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .8);
}
.chat-mock__head {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 18px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-size: 14px; font-weight: 600;
}
.chat-mock__head .dot { width: 9px; height: 9px; border-radius: 50%; background: #22c55e; }
.chat-mock__body { padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.msg {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
}
.msg--in { align-self: flex-start; background: var(--surface-2); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg--out { align-self: flex-end; background: var(--grad); color: #1a1205; font-weight: 500; border-bottom-right-radius: 4px; }

/* ---------- Тарифы ---------- */
.billing-toggle {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; margin-top: 32px;
}
.billing-toggle__label { font-size: 15px; color: var(--muted); font-weight: 600; }
.billing-toggle__label.is-active { color: var(--text); }
.billing-toggle__label em { color: var(--accent); font-style: normal; }
.billing-toggle__switch {
  width: 52px; height: 28px;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 999px;
  position: relative;
  cursor: pointer;
}
.billing-toggle__knob {
  position: absolute; top: 2px; left: 2px;
  width: 22px; height: 22px;
  background: var(--grad);
  border-radius: 50%;
  transition: transform .2s ease;
}
.billing-toggle__switch[aria-checked="true"] .billing-toggle__knob { transform: translateX(24px); }

.pricing__grid { align-items: start; }
.plan {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  position: relative;
}
.plan--featured {
  border-color: var(--accent-d);
  box-shadow: 0 0 0 1px var(--accent-d), 0 30px 60px -30px rgba(245, 158, 11, .3);
}
.plan__badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--grad);
  color: #1a1205;
  font-size: 12px; font-weight: 800;
  padding: 5px 14px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.plan__name { font-size: 22px; }
.plan__for { color: var(--dim); font-size: 14px; margin-top: 4px; }
.plan__price { margin: 18px 0 4px; }
.plan__amount { font-size: 38px; font-weight: 800; letter-spacing: -.02em; }
.plan__per { color: var(--muted); font-size: 15px; }
.plan__note { font-size: 13px; color: var(--dim); margin-bottom: 20px; }
.plan__list { list-style: none; margin-top: 22px; display: flex; flex-direction: column; gap: 11px; }
.plan__list li { position: relative; padding-left: 26px; font-size: 14px; color: var(--muted); }
.plan__list li::before {
  content: "✓";
  position: absolute; left: 0; top: 0;
  color: var(--accent);
  font-weight: 800;
}
.plan__list strong { color: var(--text); }

.plan-enterprise {
  margin-top: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.plan-enterprise h3 { font-size: 21px; margin-bottom: 8px; }
.plan-enterprise p { color: var(--muted); font-size: 15px; max-width: 720px; }

/* ---------- FAQ ---------- */
.faq__list { margin-top: 40px; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px 20px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  padding: 16px 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--accent);
  transition: transform .2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { color: var(--muted); font-size: 15px; padding: 0 0 18px; }

/* ---------- Финальный CTA ---------- */
.cta-final { background: var(--bg-soft); }
.cta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at top, rgba(245, 158, 11, .12), transparent 60%);
  pointer-events: none;
}
.lead-form { margin-top: 28px; display: flex; flex-direction: column; gap: 12px; text-align: left; }
.lead-form__row { display: flex; gap: 12px; }
.lead-form input, .lead-form select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: 10px;
  padding: 13px 15px;
  color: var(--text);
  font-size: 15px;
  font-family: var(--font);
}
.lead-form input:focus, .lead-form select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.lead-form input::placeholder { color: var(--dim); }
.lead-form__hint { font-size: 12px; color: var(--dim); text-align: center; margin-top: 4px; }
.lead-form__success {
  margin-top: 24px;
  background: rgba(34, 197, 94, .12);
  border: 1px solid rgba(34, 197, 94, .35);
  color: #4ade80;
  border-radius: 12px;
  padding: 18px;
  font-weight: 600;
}

/* ---------- Подвал ---------- */
.footer { border-top: 1px solid var(--border); padding: 56px 0 28px; background: var(--bg); }
.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
.footer__col h4 { font-size: 14px; margin-bottom: 14px; }
.footer__col a, .footer__col p { display: block; color: var(--muted); font-size: 14px; margin-bottom: 9px; }
.footer__col a:hover { color: var(--accent-2); }
.footer__col--brand .logo { margin-bottom: 12px; }
.footer__col--brand p { max-width: 280px; }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--dim);
  font-size: 13px;
}

/* ---------- Адаптив ---------- */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .demo__inner { grid-template-columns: 1fr; gap: 32px; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav, .header__actions { display: none; }
  .burger { display: flex; }

  /* Мобильное меню: drawer для nav и actions; lang-switcher и бургер остаются
     в верхней строке рядом с логотипом. */
  .header.nav-open {
    background: rgba(9, 9, 11, .96);
    backdrop-filter: blur(12px);
    border-bottom-color: var(--border);
  }
  .header.nav-open .nav,
  .header.nav-open .header__actions {
    display: flex;
    position: absolute;
    left: 0; right: 0;
    flex-direction: column;
    background: rgba(9, 9, 11, .98);
    backdrop-filter: blur(12px);
    padding: 0 20px;
    margin: 0;
    border-radius: 0;
  }
  .header.nav-open .nav {
    top: calc(72px + env(safe-area-inset-top));
    padding-top: 12px;
    gap: 4px;
  }
  .header.nav-open .nav a {
    padding: 14px 0;
    font-size: 17px;
    min-height: 48px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border);
  }
  .header.nav-open .nav a:last-child { border-bottom: 0; }
  .header.nav-open .header__actions {
    /* Стек прямо под nav. Расчёт через CSS-vars из JS (см. main.js: --mobile-nav-h). */
    top: calc(72px + env(safe-area-inset-top) + var(--mobile-nav-h, 240px));
    gap: 10px;
    padding-bottom: 16px;
  }
  .header.nav-open .header__actions .btn { width: 100%; }

  /* В закрытом виде lang-switcher скрыт, чтобы не конкурировал с бургером за место. */
  .lang-switcher { display: none; }
  /* В открытом — встаёт в верхнюю строку: лого слева, lang-switcher по центру, бургер справа. */
  .header.nav-open .lang-switcher {
    display: flex;
    margin-left: auto;
    margin-right: 8px;
  }
  /* В открытом меню auto-margin у lang-switcher уже растягивает пробел; auto у бургера
     лишний и съест место. В закрытом — оставляем auto, чтобы бургер был справа. */
  .header.nav-open .burger { margin-left: 0; }

  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero { padding: 56px 0 64px; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { width: 100%; }
  .plan { padding: 26px 20px; }
  .plan-enterprise { flex-direction: column; align-items: flex-start; padding: 26px 22px; }
  .pain, .feature, .role-card, .step { padding: 22px 20px; }
  .faq-item summary { padding: 18px 0; min-height: 52px; }
  .cta-card { padding: 36px 22px; }
  .lead-form__row { flex-direction: column; }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; }
}

/* Узкие экраны (iPhone SE, базовый Android) */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .header__inner { gap: 12px; height: 64px; }
  html { scroll-padding-top: 80px; }
  .logo__text { font-size: 17px; }
  .logo__mark { width: 28px; height: 28px; }
  .hero { padding: 44px 0 52px; }
  .hero__badge { font-size: 12px; padding: 6px 14px; margin-bottom: 20px; }
  .hero__title { font-size: clamp(28px, 8vw, 36px); }
  .hero__channels-list { gap: 8px; }
  .chip { font-size: 13px; padding: 7px 13px; }
  .section { padding: 48px 0; }
  .section__title { font-size: clamp(24px, 6.5vw, 30px); }
  .plan__amount { font-size: 32px; }
  .header.nav-open .nav { top: calc(64px + env(safe-area-inset-top)); }
  .header.nav-open .header__actions { top: calc(64px + env(safe-area-inset-top) + var(--mobile-nav-h, 240px)); }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}