/* ============================================================
   landing.css — общий стиль посадочных страниц neurologypro.ru
   Переиспользует дизайн-токены основного сайта
   ============================================================ */
:root {
  --radius: 24px;
  --max: 900px;
  --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  --font-base: 16px;
  --fs-sm: 14px;
  --fs-base: 16px;
  --fs-md: 18px;
  --fs-lg: 20px;
  --fs-xl: 24px;
  --fs-2xl: 32px;
  --fs-3xl: 40px;
}
[data-theme="light"] {
  --bg-color: #f0f2f5;
  --card-color: rgba(255, 255, 255, 0.65);
  --text-color: #1a1a1a;
  --muted-color: #555555;
  --brand-color: #00b894;
  --brand2-color: #0984e3;
  --accent-color: #0984e3;
  --border-color: rgba(255, 255, 255, 0.4);
  --glass-bg: rgba(255, 255, 255, 0.45);
  --glass-border: 1px solid rgba(0, 0, 0, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.12);
  --line-color: rgba(0, 0, 0, 0.06);
}
[data-theme="dark"] {
  --bg-color: #0f172a;
  --card-color: rgba(30, 41, 59, 0.6);
  --text-color: #eaedf1;
  --muted-color: #d1dae8;
  --brand-color: #2abeac;
  --brand2-color: #276abd;
  --accent-color: #b6c6ff;
  --border-color: rgba(255, 255, 255, 0.5);
  --glass-bg: rgba(30, 41, 59, 0.4);
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  --line-color: rgba(255, 255, 255, 0.1);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: var(--fs-base)/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text-color);
  background: var(--bg-color);
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}
a { color: var(--accent-color); }
.liquid-bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4; animation: float 20s infinite ease-in-out; }
.blob-1 { width: 500px; height: 500px; background: var(--brand-color); top: -100px; left: -100px; }
.blob-2 { width: 400px; height: 400px; background: var(--brand2-color); bottom: -100px; right: -100px; animation-delay: -5s; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -50px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* ---------- Шапка ---------- */
.landing-nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: var(--glass-border);
}
.landing-nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-img { width: 48px; height: 48px; border-radius: 24px; object-fit: cover; }
.logo-text b { display: block; font-size: var(--fs-md); color: var(--text-color); }
.logo-text span { font-size: 12px; color: var(--muted-color); }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  font-size: var(--fs-sm); color: var(--muted-color); text-decoration: none;
  padding: 6px 12px; border-radius: 999px; transition: var(--transition);
}
.nav-links a:hover { background: var(--glass-bg); color: var(--text-color); }

/* ---------- Кнопки ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 16px; text-decoration: none;
  font-weight: 600; font-size: var(--fs-md); cursor: pointer;
  background: linear-gradient(135deg, var(--brand-color), var(--brand2-color));
  color: #fff; border: none; transition: var(--transition);
  box-shadow: 0 8px 24px rgba(0, 184, 148, 0.3);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(0, 184, 148, 0.45); filter: brightness(1.08); }
.btn-ghost {
  background: var(--glass-bg); color: var(--text-color);
  border: var(--glass-border); box-shadow: none;
}
.btn-ghost:hover { border-color: var(--brand-color); color: var(--brand-color); }

/* ---------- Контент ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.breadcrumbs { font-size: var(--fs-sm); color: var(--muted-color); padding: 16px 0 0; }
.breadcrumbs a { color: var(--muted-color); text-decoration: none; }
.breadcrumbs a:hover { color: var(--brand-color); }

.hero { padding: 40px 0 24px; }
.hero h1 {
  margin: 0 0 16px; font-size: var(--fs-3xl); line-height: 1.15;
  letter-spacing: -0.5px; color: var(--text-color);
}
.hero .lead { margin: 0 0 24px; font-size: var(--fs-lg); color: var(--muted-color); max-width: 640px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.card {
  background: var(--card-color); border: var(--glass-border);
  border-radius: var(--radius); box-shadow: var(--glass-shadow);
  padding: 28px; margin-bottom: 24px;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
}
.card h2 { margin: 0 0 16px; font-size: var(--fs-xl); color: var(--text-color); }
.card h3 { margin: 20px 0 8px; font-size: var(--fs-md); color: var(--text-color); }
.card p, .card li { color: var(--muted-color); font-size: var(--fs-base); }
.card ul { margin: 12px 0 0; padding-left: 20px; }
.card li { margin: 6px 0; }

/* ---------- Плашки фактов ---------- */
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin: 8px 0 4px; }
.fact {
  padding: 16px; border-radius: 16px; background: var(--glass-bg);
  border: var(--glass-border);
}
.fact b { display: block; font-size: var(--fs-lg); color: var(--text-color); }
.fact span { display: block; font-size: var(--fs-sm); color: var(--muted-color); margin-top: 4px; }

/* ---------- Цена-акцент ---------- */
.price-highlight {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 18px 20px; border-radius: 16px;
  background: linear-gradient(135deg, rgba(0,184,148,.12), rgba(9,132,227,.08));
  border: 1px solid rgba(0,184,148,.3); margin: 8px 0;
}
.price-highlight .amount { font-size: var(--fs-2xl); font-weight: 800; color: var(--brand-color); white-space: nowrap; }
.price-highlight .desc { color: var(--muted-color); font-size: var(--fs-sm); }

/* ---------- FAQ ---------- */
.faq details {
  border: var(--glass-border); border-radius: 16px; padding: 16px;
  background: var(--glass-bg); margin-bottom: 12px; cursor: pointer; transition: var(--transition);
}
.faq details[open] { border-color: var(--brand-color); background: rgba(0,184,148,.06); }
.faq summary { font-weight: 600; color: var(--text-color); cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "＋ "; color: var(--brand-color); font-weight: 700; }
.faq details[open] summary::before { content: "－ "; }
.faq p { margin: 10px 0 0; color: var(--muted-color); }

/* ---------- CTA-блок ---------- */
.cta-block { text-align: center; padding: 36px 28px; }
.cta-block h2 { margin-bottom: 8px; }
.cta-block p { margin: 0 0 20px; }

/* ---------- Футер ---------- */
footer {
  margin-top: 40px; padding: 24px 0; border-top: var(--glass-border);
  color: var(--muted-color); font-size: var(--fs-sm);
}
.foot-inner { max-width: var(--max); margin: 0 auto; padding: 0 20px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }
footer a { color: var(--muted-color); }
footer a:hover { color: var(--brand-color); }

/* ---------- Адаптив ---------- */
@media (max-width: 640px) {
  .hero h1 { font-size: var(--fs-2xl); }
  .hero .lead { font-size: var(--fs-md); }
  .card { padding: 20px; }
}
@media (max-width: 400px) {
  .nav-links a { padding: 6px 8px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  .blob { animation: none; }
  * { transition: none !important; }
}
/* ============================================================
   Переключатель темы (синхронизирован с основным сайтом)
   ============================================================ */
.landing-theme {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
}
.landing-theme .lt-icon {
  font-size: 14px;
  line-height: 1;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.landing-theme .lt-sun  { opacity: 1; }
.landing-theme .lt-moon { opacity: 0.45; }
[data-theme="dark"] .landing-theme .lt-sun  { opacity: 0.45; }
[data-theme="dark"] .landing-theme .lt-moon { opacity: 1; }

.lt-switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 24px;
  flex-shrink: 0;
}
.lt-switch input { opacity: 0; width: 0; height: 0; }
.lt-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: 34px;
  transition: background-color 0.4s ease, border-color 0.4s ease;
  backdrop-filter: blur(4px);
}
.lt-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 2px;
  background: linear-gradient(135deg, var(--brand-color), var(--brand2-color));
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
  /* «пружинка» при переключении */
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.lt-switch input:checked + .lt-slider:before { transform: translateX(22px); }
.lt-switch input:focus-visible + .lt-slider {
  outline: 3px solid var(--brand-color);
  outline-offset: 2px;
}

/* Плавная смена цветов при переключении темы */
.card, .landing-nav, .fact, .price-highlight, .breadcrumbs, footer {
  transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}
/* ============================================================
   Верхняя планка (телефон + тема). Скрывается при прокрутке.
   ============================================================ */
:root { --topbar-h: 42px; }

.landing-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-h);
  z-index: 1100;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: var(--glass-border);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.landing-topbar.hidden { transform: translateY(-100%); }

.landing-topbar-inner {
  max-width: var(--max);
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar-phone {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--muted-color);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s ease;
}
.topbar-phone:hover { color: var(--brand-color); }

/* Отступ, чтобы планка не перекрывала контент при загрузке */
body { padding-top: var(--topbar-h); }