/* ================================================================
   0. CSS-ПЕРЕМЕННЫЕ И ТЕМНАЯ ТЕМА
   ================================================================ */
:root {
  --bg:            #ffffff;
  --bg-section:    #f6f8fa;
  --text:          #0f172a;
  --text-secondary:#64748b;
  --accent:        #3b82f6;
  --accent-dark:   #2563eb;
  --accent-light:  #eff6ff;
  --border:        #e2e8f0;
  --border-light:  #f1f5f9;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.04);
  --shadow-hover:  0 12px 32px rgba(59,130,246,.15);
  --radius:        16px;
  --transition:    .35s cubic-bezier(.25,.46,.45,.94);
  --surface: var(--bg-section);
  --accent-soft: var(--accent-light);
  --success: #22c55e;
}

html[data-theme="dark"] {
  --bg:            #0d1117;
  --bg-section:    #161b22;
  --text:          #c9d1d9;
  --text-secondary:#8b949e;
  --accent:        #58a6ff;
  --accent-dark:   #1f6feb;
  --accent-light:  rgba(56, 139, 253, 0.15);
  --border:        #30363d;
  --border-light:  #21262d;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.3);
  --shadow-hover:  0 12px 32px rgba(56,139,253,.2);
  --success:       #3fb950;
}


/* ================================================================
   1. СБРОС И БАЗОВЫЕ СТИЛИ
   ================================================================ */
*,
*::before,
*::after {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

/* Предотвращаем скачок макета при скрытии скроллбара */
html.scrollbar-hidden,
html.scrollbar-hidden body {
  overflow: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
html.scrollbar-hidden::-webkit-scrollbar {
  display: none;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Ubuntu, Roboto, "Helvetica Neue", sans-serif;
  font-size: clamp(16px, 0.5vw + 15px, 18px);
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.4s ease, color 0.4s ease;
}

body.menu-open {
  overflow: hidden;
  -webkit-overflow-scrolling: auto;
}

::selection {
  background: var(--accent);
  color: #fff;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-dark);
}

h1, h2, h3, h4 {
  color: var(--text);
  letter-spacing: -.02em;
}

h1 { font-size: clamp(1.75rem, 1.5rem + 2.5vw, 3.5rem); line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 1.25rem + 1.5vw, 2.5rem); line-height: 1.2; }
h3 { font-size: clamp(1.25rem, 1.1rem + 1vw, 1.75rem); line-height: 1.3; }
h4 { font-size: clamp(1.1rem, 1rem + 0.5vw, 1.25rem); line-height: 1.4; }

img {
  max-width: 100%;
}

/* Защита от длинных слов в карточках и текстовых блоках */
.feature-card h2,
.guide-card h3,
.info-block-content h2,
.footer-col > p {
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
  -webkit-hyphens: auto;
}


/* ================================================================
   2. УТИЛИТЫ — АНИМАЦИИ ПРИ СКРОЛЛЕ
   ================================================================ */
.anim-fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease-out, transform .7s ease-out;
  will-change: opacity, transform;
}
.anim-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.anim-blur-in {
  opacity: 0;
  filter: blur(10px);
  transform: translateY(14px);
  transition: opacity .9s ease-out, filter .9s ease-out, transform .9s ease-out;
  will-change: opacity, filter, transform;
}
.anim-blur-in.is-visible {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
}

.anim-scale-bounce {
  opacity: 0;
  transform: scale(.6);
  transition: opacity .6s cubic-bezier(.34,1.56,.64,1),
              transform .6s cubic-bezier(.34,1.56,.64,1);
  will-change: opacity, transform;
}
.anim-scale-bounce.is-visible {
  opacity: 1;
  transform: scale(1);
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease-out, transform .7s ease-out;
}
.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ================================================================
   3. РЕДУСИРОВАННАЯ АНИМАЦИЯ
   ================================================================ */
@media (prefers-reduced-motion: reduce) {
  .hero-badge,
  .hero h1,
  .hero-subtitle,
  .hero-actions,
  .hero-browser,
  .hero-features,
  .anim-fade-up,
  .anim-blur-in,
  .anim-scale-bounce,
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    filter: none;
    animation: none;
    transition: none;
  }
  .hero-float {
    animation: none;
  }
}


/* ================================================================
   4. КНОПКИ (ОБЩИЕ)
   ================================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition: all .3s ease;
  letter-spacing: .01em;
  box-shadow: 0 2px 8px rgba(59,130,246,.25),
              inset 0 1px 0 rgba(255,255,255,.15);
}
.btn-primary .icon { width: 18px; height: 18px; }
.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(59,130,246,.35),
              inset 0 1px 0 rgba(255,255,255,.15);
  text-decoration: none;
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  cursor: pointer;
  transition: all .3s ease;
}
.btn-ghost .icon {
  width: 16px;
  height: 16px;
  transition: transform .3s ease;
}
.btn-ghost:hover {
  color: var(--text);
  border-color: #cbd5e1;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  text-decoration: none;
}
.btn-ghost:hover .icon { transform: translateY(2px); }


/* ================================================================
   5. НАВБАР (ФИКСИРОВАННАЯ ШАПКА)
   ================================================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background-color: rgba(255,255,255,.86);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(0,0,0,.05);
  box-shadow: 0 2px 10px rgba(0,0,0,.05);
  padding: 0.8rem 0;
  transition: all .4s ease;
}

.navbar.scrolled {
  padding: 0.5rem 0;
  box-shadow: 0 4px 20px rgba(0,0,0,.05);
  background-color: rgba(255,255,255,.86);
}

html[data-theme="dark"] .navbar,
html[data-theme="dark"] .navbar.scrolled { 
  background-color: rgba(13, 17, 23, 0.86); 
  border-bottom-color: rgba(255,255,255,.05); 
}

.navbar .wrapper {
  max-width: 1200px; margin: 0 auto; padding: 0 1.5rem;
  display: flex; align-items: center;
}

.navbar-brand {
  font-weight: 800; letter-spacing: -.5px;
  display: flex; align-items: center; gap: 10px;
  text-transform: uppercase;
  transition: transform var(--transition) ease;
  color: var(--text); font-size: clamp(1.1rem, 0.5vw + 1rem, 1.3rem);
}
.navbar-brand::before { display: none; }
.navbar-brand:hover { color: var(--text); transform: translateY(-2px); }

.brand-icon {
  width: 26px; height: 26px; flex-shrink: 0;
  color: var(--accent); transition: transform var(--transition);
}
.navbar-brand:hover .brand-icon { transform: rotate(-6deg) scale(1.08); }
.navbar-brand span { font-weight: 700; font-size: inherit; }

.nav-links {
  display: flex; align-items: center; gap: 4px;
  margin-left: auto; list-style: none;
}

.nav-links > li > a, .nav-links > li > button.theme-toggle {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  color: var(--text-secondary); font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.95rem); font-weight: 700;
  border-radius: 999px; background: var(--bg-section);
  transition: all var(--transition);
  white-space: nowrap;
  position: relative; overflow: hidden;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}

.nav-links > li > a:hover, .nav-links > li > button.theme-toggle:hover {
  color: var(--accent); background: var(--accent-light); text-decoration: none;
}
.nav-links > li > a:hover::after { width: 100%; opacity: 1; }
.nav-links > li > a .icon, .nav-links > li > button.theme-toggle .icon { width: 15px; height: 15px; flex-shrink: 0; }

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
}
.nav-cta:hover {
  background: var(--accent-dark) !important;
}
.nav-cta::after { display: none !important; }

.theme-toggle {
    background: var(--bg-section); border: 1px solid transparent; border-radius: 999px;
    padding: 8px; cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: all var(--transition);
    font-family: inherit; font-weight: 600; color: var(--text); font-size: 1rem;
}
.theme-toggle:hover { background: var(--accent-light); border-color: var(--accent); }
.theme-toggle svg { width: 16px; height: 16px; color: var(--text-secondary); transition: color 0.3s; }
.theme-toggle:hover svg { color: var(--accent); }
.theme-toggle .moon-icon { display: none; }
html[data-theme="dark"] .theme-toggle .sun-icon { display: none; }
html[data-theme="dark"] .theme-toggle .moon-icon { display: inline-block; }

.nav-toggle {
  display: none; align-items: center; justify-content: center;
  width: 38px; height: 38px; background: var(--bg-section);
  border: 1px solid var(--border); border-radius: 10px;
  cursor: pointer; margin-left: auto; position: relative; z-index: 1100;
  -webkit-tap-highlight-color: transparent;
}
.nav-toggle span, .nav-toggle span:before, .nav-toggle span:after {
  display: block; width: 18px; height: 2px; background: var(--text);
  border-radius: 2px; position: absolute; transition: all .3s ease;
}
.nav-toggle span:before { content: ''; transform: translateY(-6px); }
.nav-toggle span:after  { content: ''; transform: translateY(6px); }
.nav-toggle.active span { background: transparent; }
.nav-toggle.active span:before { transform: rotate(45deg); }
.nav-toggle.active span:after  { transform: rotate(-45deg); }

@media (max-width: 1023px) { 
  .nav-toggle { display: flex; } 
  .nav-links { display: none; } 
}

@media (min-width: 1024px) {
  .navbar-brand { font-size: 1.3rem; }
  .brand-icon { width: 30px; height: 30px; }
  .nav-links > li > a, .nav-links > li > button.theme-toggle { font-size: 0.95rem; }
}


/* ================================================================
   6. OFFCANVAS (МОБИЛЬНОЕ МЕНЮ)
   ================================================================ */
.offcanvas-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0);
  opacity: 0; visibility: hidden; z-index: 1050;
  transition: opacity .4s ease, visibility .4s ease, background .4s ease;
}
.offcanvas-overlay.visible { 
  opacity: 1; visibility: visible; background: rgba(0,0,0,.45); 
}

.offcanvas-panel {
  position: fixed; top: 0; right: 0; bottom: 0; width: 90%; max-width: 360px;
  background: var(--bg); z-index: 1060; display: flex; flex-direction: column;
  transform: translateX(100%); visibility: hidden;
  transition: transform .45s cubic-bezier(.22,1,.36,1), visibility .45s cubic-bezier(.22,1,.36,1);
  box-shadow: -8px 0 40px rgba(0,0,0,0); overflow: hidden;
}
.offcanvas-panel.show { 
  transform: translateX(0); visibility: visible; box-shadow: -8px 0 40px rgba(0,0,0,.15); 
}

.offcanvas-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px; background: linear-gradient(135deg, #0070c9 0%, #348efb 100%);
  color: #fff; flex-shrink: 0;
}
.offcanvas-title { font-size: clamp(1rem, 0.5vw + 0.95rem, 1.1rem); font-weight: 700; }

.offcanvas-close {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; background: rgba(255,255,255,.15);
  border: none; border-radius: 10px; cursor: pointer; color: #fff;
  transition: background .25s ease, transform .25s ease;
}
.offcanvas-close:hover { background: rgba(255,255,255,.3); transform: scale(1.08); }
.offcanvas-close:active { transform: scale(.95); }
.offcanvas-close svg { width: 20px; height: 20px; }

.offcanvas-nav { 
  flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 12px 0; 
}

.offcanvas-link {
  display: flex; align-items: center; gap: 14px; padding: 15px 24px;
  color: var(--text); font-size: clamp(1rem, 0.5vw + 0.95rem, 1.05rem); font-weight: 500;
  position: relative; overflow: hidden; transition: color .3s ease, background .3s ease;
}
.offcanvas-link::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--accent); transform: scaleY(0);
  transition: transform .3s cubic-bezier(.22,1,.36,1); border-radius: 0 4px 4px 0;
}
.offcanvas-link:hover { color: var(--accent-dark); background: var(--accent-light); }
.offcanvas-link:hover::before { transform: scaleY(1); }
.offcanvas-link:active { background: var(--accent-light); }

.offcanvas-link .icon { 
  width: 22px; height: 22px; flex-shrink: 0; color: var(--text-secondary); transition: color .3s ease; 
}
.offcanvas-link:hover .icon { color: var(--accent); }

.offcanvas-link .external-arrow {
  margin-left: auto; width: 16px; height: 16px; flex-shrink: 0;
  color: var(--border); transition: color .3s ease, transform .3s ease;
}
.offcanvas-link:hover .external-arrow { color: var(--accent); transform: translateX(3px); }

.offcanvas-footer {
  flex-shrink: 0; padding: 16px 24px;
  background: var(--bg-section); border-top: 1px solid var(--border-light);
}
.offcanvas-footer p { font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.9rem); line-height: 1.6; color: var(--text-secondary); }

@media (min-width: 1024px) { 
  .offcanvas-overlay, .offcanvas-panel { display: none !important; } 
}


/* ================================================================
   7. HERO (ПЕРВАЯ СЕКЦИЯ)
   ================================================================ */
.hero {
  position: relative;
  padding: 130px 1.25rem 50px;
  background: var(--bg);
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--bg-section));
  pointer-events: none;
  z-index: 3;
}

.hero-inner {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  z-index: 2;
}

/* -- Бейдж -- */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 12px;
  background: var(--bg-section);
  border: 1px solid rgba(34,197,94,.15);
  border-radius: 999px;
  font-size: clamp(0.75rem, 0.5vw + 0.7rem, 0.85rem);
  font-weight: 600;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(16px);
  animation: heroUp .6s ease-out .05s forwards;
}
.hero-badge .icon { width: 15px; height: 15px; flex-shrink: 0; }

/* -- Заголовок -- */
.hero h1 {
  font-size: clamp(2rem, 1.5rem + 4vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: 1.1;
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(24px);
  animation: heroUp .7s ease-out .12s forwards;
}

.hero h1 .accent {
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #8b5cf6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* -- Подзаголовок -- */
.hero-subtitle {
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.7;
  font-weight: 300;
  max-width: 700px;
  margin: 0 auto 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: heroUp .7s ease-out .22s forwards;
}

@keyframes heroUp {
  to { opacity: 1; transform: translateY(0); }
}

/* -- Кнопки -- */
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
  opacity: 0;
  transform: translateY(20px);
  animation: heroUp .7s ease-out .32s forwards;
}

/* -- Снимок браузера -- */
.hero-browser {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(40px) scale(.97);
  animation: heroUp .9s ease-out .38s forwards;
}

.browser-frame {
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0,0,0,.02),
    0 4px 12px rgba(0,0,0,.04),
    0 16px 40px -8px rgba(0,0,0,.08),
    0 32px 64px -16px rgba(0,0,0,.06);
  transition: transform .5s ease, box-shadow .5s ease;
}

.hero-browser:hover .browser-frame {
  transform: translateY(-6px);
  box-shadow:
    0 0 0 1px rgba(0,0,0,.02),
    0 8px 20px rgba(0,0,0,.06),
    0 24px 48px -8px rgba(0,0,0,.1),
    0 40px 72px -16px rgba(0,0,0,.08);
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border-light);
}

.browser-dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}
.browser-dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.browser-dots span:first-child  { background: #fca5a5; }
.browser-dots span:nth-child(2) { background: #fcd34d; }
.browser-dots span:nth-child(3) { background: #86efac; }

.browser-url {
  flex: 1;
  height: 32px;
  background: var(--bg-section);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0 12px;
}
.browser-url .icon { width: 14px; height: 14px; flex-shrink: 0; opacity: .5; }

.browser-body { background: var(--bg); line-height: 0; }
.browser-body img { width: 100%; height: auto; display: block; }

/* -- Мини-фичи под снимком -- */
.hero-features {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 40px;
  opacity: 0;
  transform: translateY(16px);
  animation: heroUp .7s ease-out .52s forwards;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: clamp(0.8rem, 0.5vw + 0.75rem, 0.9rem);
  color: var(--text-secondary);
}
.hero-feature .icon { width: 16px; height: 16px; flex-shrink: 0; color: var(--success); }
.hero-feature strong  { color: var(--text-secondary); font-weight: 600; }

/* -- Плавающие иконки (декор) -- */
.hero-float {
  position: absolute;
  pointer-events: none;
  z-index: 1;
  opacity: .06;
}
.hero-float .icon { width: 100%; height: 100%; }

.hero-float-1 { top: 18%; left: 6%;  width: 48px; height: 48px; animation: heroFloat 8s ease-in-out infinite; }
.hero-float-2 { top: 25%; right: 8%; width: 40px; height: 40px; animation: heroFloat 10s ease-in-out infinite 2s; }
.hero-float-3 { bottom: 26%; left: 10%; width: 44px; height: 44px; animation: heroFloat 9s ease-in-out infinite 4s; }
.hero-float-4 { bottom: 30%; right: 10%; width: 36px; height: 36px; animation: heroFloat 11s ease-in-out infinite 1s; }
.hero-float-5 { top: 12%; right: 22%; width: 32px; height: 32px; animation: heroFloat 7s ease-in-out infinite .5s; }
.hero-float-6 { top: 40%; left: 4%;  width: 52px; height: 52px; animation: heroFloat 12s ease-in-out infinite 3s; }
.hero-float-7 { bottom: 14%; left: 6%;  width: 38px; height: 38px; animation: heroFloat 9.5s ease-in-out infinite 5s; }
.hero-float-8 { top: 55%; right: 3%;  width: 46px; height: 46px; animation: heroFloat 10.5s ease-in-out infinite 1.5s; }

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

/* -- Hero: адаптив -- */
@media (max-width: 360px) {
  .hero { padding: 115px 1rem 40px; }
  .hero-badge { font-size: 0.7rem; padding: 5px 12px 5px 7px; margin-bottom: 24px; }
  .hero h1 { margin-bottom: 16px; }
  .hero-subtitle { font-size: 0.95rem; margin-bottom: 32px; }
  .hero-actions { margin-bottom: 40px; }
  .browser-dots { gap: 4px; }
  .browser-dots span { width: 8px; height: 8px; }
  .browser-bar { padding: 10px 12px; gap: 8px; }
  .browser-url { font-size: 0.7rem; height: 28px; padding: 0 8px; }
  .hero-features { gap: 12px 20px; }
  .hero-feature { font-size: 0.75rem; }
}

@media (max-width: 640px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { width: 100%; justify-content: center; }
  .hero-float { display: none; }
}

@media (min-width: 1024px) {
  .hero { padding: 160px 2rem 80px; }
  .hero h1 { font-size: clamp(3.5rem, 7vw, 6rem); }
  .hero-subtitle { font-size: 1.45rem; margin-bottom: 48px; }
  .btn-primary { padding: 18px 48px; font-size: 1rem; border-radius: 16px; }
  .btn-ghost   { padding: 18px 40px; font-size: 1rem; border-radius: 16px; }
  .hero-browser { max-width: 860px; }
  .hero-features { gap: 44px; margin-top: 52px; }
  .hero-feature { font-size: 0.9rem; }
}


/* ================================================================
   8. РЕКЛАМНЫЕ БЛОКИ (AD SLOTS)
   ================================================================ */
.ads {
  overflow: hidden;
  text-align: center;
  margin: 0 0 20px auto;
  padding: 0;
  clear: both;
  max-width: 1200px;
}

.ON_Top { width: 200px; height: 200px; }

@media (min-width: 316px) { .ON_Top { width: 234px; height: 60px;  } }
@media (min-width: 402px) { .ON_Top { width: 320px; height: 100px; } }
@media (min-width: 550px) { .ON_Top { width: 468px; height: 60px;  } }
@media (min-width: 876px) { .ON_Top { width: 728px; height: 90px;  } }


/* ================================================================
   9. FEATURES (СЕТКА ВОЗМОЖНОСТЕЙ)
   ================================================================ */
.features {
  padding: 80px 0;
  background: var(--bg-section);
  position: relative;
  z-index: 3;
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 { font-size: clamp(1.5rem, 1rem + 2vw, 2.5rem); margin-bottom: 12px; }
.section-header p  { color: var(--text-secondary); max-width: 560px; margin: 0 auto; font-size: clamp(1rem, 0.5vw + 0.95rem, 1.15rem); line-height: 1.7; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: rgba(52,142,251,.3);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.feature-icon {
  width: 40px;
  height: 40px;
  color: var(--accent);
  margin-bottom: 16px;
  transition: transform var(--transition);
}
.feature-card:hover .feature-icon { transform: scale(1.15); }

.feature-card h3 { font-size: clamp(1.1rem, 0.5vw + 1rem, 1.3rem); font-weight: 700; margin-bottom: 10px; line-height: 1.3; }
.feature-card p  { color: var(--text-secondary); font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem); line-height: 1.7; }

/* -- Features: адаптив -- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .features { padding: 60px 0; }
  .features-grid { gap: 12px; }
  .feature-card { padding: 22px; }
  .feature-icon { width: 34px; height: 34px; margin-bottom: 12px; }
  .feature-card h3 { font-size: 1rem; }
  .feature-card p { font-size: 0.9rem; line-height: 1.6; }
}

@media (max-width: 640px) {
  .features-grid { grid-template-columns: 1fr; }
}

@media (min-width: 1024px) {
  .section-header { margin-bottom: 56px; }
  .section-header h2 { font-size: 3rem; }
  .section-header p  { font-size: 1.2rem; max-width: 620px; }
  .features-grid     { gap: 20px; }
  .feature-card      { padding: 32px; }
  .feature-icon      { width: 48px; height: 48px; margin-bottom: 20px; }
  .feature-card h3   { font-size: 1.4rem; }
  .feature-card p    { font-size: 1.12rem; line-height: 1.75; }
}


/* ================================================================
   10. GUIDE CARDS (КАРТОЧКИ-ССЫЛКИ РУКОВОДСТВА)
   ================================================================ */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.guide-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.guide-card:hover {
  border-color: rgba(52,142,251,.3);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.guide-card h3 {
  font-size: clamp(1.05rem, 0.5vw + 1rem, 1.25rem);
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}
.guide-card p {
  color: var(--text-secondary);
  font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.guide-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  width: fit-content;
  font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.95rem);
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-light);
  border: 1px solid rgba(52,142,251,.15);
  border-radius: 10px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  margin: 0 auto;
  transition: all var(--transition);
}
.guide-btn .icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.guide-btn:hover {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgba(52,142,251,.3);
  text-decoration: none;
}
.guide-btn:hover .icon { transform: translateX(3px); }
.guide-btn:active { transform: scale(.97); }

/* -- Guide Cards: адаптив -- */
@media (max-width: 768px) {
  .guide-card { padding: 22px; }
  .guide-card h3 { font-size: 0.97rem; }
  .guide-card p { font-size: 0.9rem; line-height: 1.6; margin-bottom: 16px; }
  .guide-btn { padding: 9px 20px; font-size: 0.85rem; }
}

@media (max-width: 640px) {
  .guide-grid { grid-template-columns: 1fr; }
}

@media (min-width: 1024px) {
  .guide-grid   { gap: 20px; }
  .guide-card   { padding: 32px; }
  .guide-card h3 { font-size: 1.3rem; margin-bottom: 14px; }
  .guide-card p  { font-size: 1.08rem; line-height: 1.75; margin-bottom: 24px; }
  .guide-btn     { padding: 12px 28px; font-size: 0.95rem; border-radius: 12px; }
}


/* ================================================================
   11. INFO SECTIONS (ИНФОРМАЦИОННЫЕ БЛОКИ-СТАТЬИ)
   ================================================================ */
.info-sections {
  background: var(--bg);
}

.info-block {
  width: 100%;
  padding: 52px 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
  transition: background .4s ease;
}

.info-block:nth-child(odd)  { background: var(--bg-section); border-radius: 0; }
.info-block:nth-child(even) { background: var(--bg); }

.info-block-content {
  max-width: 960px;
  width: 100%;
}

.info-block .guide-grid {
  max-width: 960px;
  width: 100%;
}

.info-block-visual {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .4s cubic-bezier(.34,1.56,.64,1), box-shadow .4s ease;
}
.info-block-visual .icon { width: 36px; height: 36px; color: var(--accent); }

.info-block:hover .info-block-visual {
  transform: scale(1.08);
  box-shadow: 0 8px 30px rgba(59,130,246,.2);
}

.info-block-content h2 { font-size: clamp(1.25rem, 1rem + 1.5vw, 1.75rem); margin-bottom: 14px; line-height: 1.3; }
.info-block-content p  {
  color: var(--text-secondary);
  margin-bottom: 1em;
  font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.1rem);
  line-height: 1.8;
}

/* -- Info Sections: адаптив -- */
@media (min-width: 768px) {
  .info-block { padding: 64px 1.5rem; gap: 28px; }
  .info-block:nth-child(odd) { border-radius: 0px; }
  .info-block-visual { width: 80px; height: 80px; border-radius: 20px; }
  .info-block-visual .icon { width: 40px; height: 40px; }
  .info-block-content h2 { font-size: 1.5rem; margin-bottom: 16px; }
  .info-block-content p { font-size: 1rem; line-height: 1.75; }
}

@media (min-width: 1024px) {
  .info-block { padding: 88px 2rem; gap: 36px; }
  .info-block:nth-child(odd) {
    border-radius: 0px 0px 0 0;
  }
  .info-block-visual { width: 96px; height: 96px; border-radius: 24px; }
  .info-block-visual .icon { width: 48px; height: 48px; }
  .info-block-content h2 { font-size: 2.1rem; margin-bottom: 20px; }
  .info-block-content p { font-size: 1.18rem; line-height: 1.9; }
}


/* ================================================================
   12. PAGE HERO (ШАПКА ВНУТРЕННИХ СТРАНИЦ)
   ================================================================ */
.page-hero {
  padding: 130px 1.25rem 48px;
  background: var(--bg-section);
  border-bottom: 1px solid var(--border-light);
  text-align: center;
}
.page-hero .container { max-width: 1200px; margin: 0 auto; }

.page-hero h1 {
  font-size: clamp(1.75rem, 1.5rem + 2vw, 2.5rem); font-weight: 800;
  letter-spacing: -.03em; margin-bottom: 12px; line-height: 1.2;
}
.page-hero p {
  font-size: clamp(1rem, 0.5vw + 0.95rem, 1.15rem); color: var(--text-secondary);
  line-height: 1.7; max-width: 800px; margin: 0 auto;
}

@media (max-width: 360px) { .page-hero { padding: 115px 1rem 36px; } }
@media (min-width: 1024px) {
  .page-hero { padding: 140px 2rem 56px; }
  .page-hero h1 { font-size: 2.4rem; }
  .page-hero p { font-size: 1.15rem; }
}


/* ================================================================
   13. PAGE LAYOUT (РАЗМЕТКА ВНУТРЕННИХ СТРАНИЦ)
   ================================================================ */
.page-container { padding: 32px 0 48px; }
.page-container .container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.page-row { display: grid; grid-template-columns: 1fr; gap: 28px; }

@media (min-width: 768px) {
  .page-container { padding: 40px 0 56px; }
  .page-container .container { padding: 0 1.5rem; }
  .page-row { gap: 36px; }
}

@media (min-width: 1024px) {
  .page-container { padding: 48px 0 72px; }
  .page-row { grid-template-columns: 1fr 300px; gap: 48px; }
}


/* ================================================================
   14. PAGE CONTENT (КОНТЕНТ ВНУТРЕННИХ СТРАНИЦ)
   ================================================================ */
.page-content { min-width: 0; }
.page-section { margin-bottom: 28px; }
.page-section:last-of-type { margin-bottom: 0; }

.page-section h2 {
  font-size: clamp(1.25rem, 1rem + 1vw, 1.5rem); font-weight: 700; margin-bottom: 12px;
  padding-bottom: 10px; border-bottom: 1px solid var(--border-light); line-height: 1.3;
}
.page-section h3 { font-size: clamp(1.1rem, 0.5vw + 1rem, 1.25rem); font-weight: 600; margin: 18px 0 8px; line-height: 1.4; }
.page-section p {
  color: var(--text-secondary); font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem); line-height: 1.8; margin-bottom: 10px;
}
.page-section ul {
  padding-left: 22px; margin: 6px 0 14px; list-style: disc;
}
.page-section ul li {
  color: var(--text-secondary); font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem); line-height: 1.8;
  margin-bottom: 5px; padding-left: 2px;
}

.highlight {
  background: var(--accent-light); color: var(--accent-dark);
  padding: 2px 8px; border-radius: 6px; font-weight: 600;
}

.page-section a {
  color: var(--accent-dark); font-weight: 500;
  border-bottom: 1px solid rgba(37,99,235,.2);
  transition: all var(--transition);
}
.page-section a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.page-divider { border: none; border-top: 1px solid var(--border); margin: 32px 0 20px; }
.page-updated { text-align: center; color: var(--text-secondary); font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.9rem); margin-bottom: 0; }

/* -- Page Content: адаптив -- */
@media (min-width: 768px) {
  .page-section { margin-bottom: 32px; }
  .page-section h2 { font-size: 1.3rem; margin-bottom: 14px; padding-bottom: 12px; }
  .page-section h3 { font-size: 1.08rem; margin: 20px 0 10px; }
  .page-section p { font-size: 1rem; line-height: 1.85; margin-bottom: 12px; }
  .page-section ul li { font-size: 1rem; }
  .page-divider { margin: 40px 0 24px; }
}

@media (min-width: 1024px) {
  .page-section { margin-bottom: 36px; }
  .page-section h2 { font-size: 1.35rem; margin-bottom: 16px; padding-bottom: 12px; }
  .page-section h3 { font-size: 1.1rem; margin: 24px 0 12px; }
  .page-section p { font-size: 1.05rem; line-height: 1.85; margin-bottom: 14px; }
  .page-section ul li { font-size: 1.05rem; }
  .page-divider { margin: 48px 0 28px; }
}


/* ================================================================
   15. PAGE SIDEBAR (БОКОВАЯ ПАНЕЛЬ)
   ================================================================ */
.page-sidebar { display: none; }

@media (min-width: 1024px) {
  .page-sidebar {
    display: block;
    position: sticky;
    top: 84px;
    align-self: start;
  }
}

.sidebar-block {
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 20px;
}
.sidebar-block:last-child { margin-bottom: 0; }

.sidebar-block-header {
  padding: 12px 16px;
  background: var(--border-light);
  border-bottom: 1px solid var(--border);
  font-size: clamp(0.75rem, 0.5vw + 0.7rem, 0.85rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-secondary);
  line-height: 1.4;
}

.sidebar-ads {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: clamp(0.8rem, 0.5vw + 0.75rem, 0.9rem);
}
.sidebar-ads svg { width: 32px; height: 32px; opacity: .25; }
.sidebar-ads span { opacity: .4; font-weight: 500; }

.sidebar-nav-block {
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  margin-bottom: 20px;
}
.sidebar-nav-block:last-child { margin-bottom: 0; }

.sidebar-nav-block h3 {
  font-size: clamp(0.75rem, 0.5vw + 0.7rem, 0.85rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-secondary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  line-height: 1.4;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-nav li { margin: 0; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 0.95rem);
  font-weight: 500;
  transition: color .2s ease, background .2s ease;
  line-height: 1.4;
}
.sidebar-nav a .icon {
  width: 15px; height: 15px; flex-shrink: 0;
  opacity: .4; transition: opacity .2s ease;
}
.sidebar-nav a:hover { color: var(--accent-dark); background: var(--bg); text-decoration: none; }
.sidebar-nav a:hover .icon { opacity: .7; color: var(--accent); }
.sidebar-nav a.active { color: var(--accent-dark); background: var(--bg); font-weight: 600; }
.sidebar-nav a.active .icon { opacity: .7; color: var(--accent); }


/* ================================================================
   16. СТАТЕЙНЫЕ КОМПОНЕНТЫ (ЦИТАТЫ, ПРИМЕЧАНИЯ, ПРЕДУПРЕЖДЕНИЯ, КАРТИНКИ)
   ================================================================ */

/* -- Цитата -- */
.article-quote {
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
  border-radius: 0 12px 12px 0;
  padding: 18px 22px;
  margin: 20px 0;
  color: var(--text);
  font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.1rem);
  font-style: italic;
  line-height: 1.8;
  position: relative;
}
.article-quote::before {
  content: '\201C';
  position: absolute;
  top: 8px; left: 18px;
  font-size: 3rem;
  line-height: 1;
  color: var(--accent);
  opacity: .15;
  font-style: normal;
  font-family: Georgia, "Times New Roman", serif;
}

/* -- Примечание -- */
.article-note {
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 16px 20px;
  margin: 16px 0;
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  line-height: 1.75;
}
.article-note code {
  background: rgba(59,130,246,.1);
  color: var(--accent-dark);
  padding: 2px 7px;
  border-radius: 5px;
  font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.9rem);
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  white-space: nowrap;
}

/* -- Предупреждение -- */
.article-warning {
  background: #fef2f2;
  border-left: 4px solid #ef4444;
  border-radius: 0 10px 10px 0;
  padding: 16px 20px;
  margin: 16px 0;
  color: #991b1b;
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  line-height: 1.75;
}
.article-warning strong { color: #dc2626; }

/* -- Изображения -- */
.article-image {
  display: block;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 16px 0;
  background: var(--bg-section);
}

/* -- Адаптив статейных компонентов -- */
@media (min-width: 768px) {
  .article-quote { padding: 22px 26px; font-size: 1.05rem; }
  .article-note { padding: 18px 24px; font-size: 1rem; }
  .article-warning { padding: 18px 24px; font-size: 1rem; }
}

@media (min-width: 1024px) {
  .article-quote { padding: 24px 30px; font-size: 1.1rem; line-height: 1.8; }
  .article-note { padding: 20px 26px; font-size: 1.05rem; line-height: 1.8; }
  .article-warning { padding: 20px 26px; font-size: 1.05rem; line-height: 1.8; }
}

/* Темная тема для предупреждений */
html[data-theme="dark"] .article-warning { background: rgba(239, 68, 68, 0.1); color: #fca5a5; }
html[data-theme="dark"] .article-warning strong { color: #ef4444; }


/* ================================================================
   17. ТАБЛИЦА ГОРЯЧИХ КЛАВИШ
   ================================================================ */
.shortcuts-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
}

.shortcuts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.95rem);
}

.shortcuts-table thead th {
  background: var(--bg-section);
  color: var(--text);
  font-size: clamp(0.75rem, 0.5vw + 0.7rem, 0.85rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
  line-height: 1.4;
}
.shortcuts-table thead th:not(:first-child) { text-align: center; }

.shortcuts-table tbody tr { transition: background .15s ease; }
.shortcuts-table tbody tr:hover { background: var(--accent-light); }
.shortcuts-table tbody tr:not(:last-child) td { border-bottom: 1px solid var(--border-light); }

.shortcuts-table tbody td {
  padding: 11px 16px;
  color: var(--text-secondary);
  vertical-align: middle;
  line-height: 1.5;
}
.shortcuts-table tbody td:not(:first-child) { text-align: center; white-space: nowrap; }

/* Иконка действия */
.shortcut-action {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: var(--text);
}

.shortcut-action-icon {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: 7px;
  flex-shrink: 0;
  color: var(--accent);
}
.shortcut-action-icon svg { width: 15px; height: 15px; }

/* Клавиши */
.kbd {
  display: inline-flex;
  align-items: center;
  gap: 0;
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", "Courier New", monospace;
  font-size: clamp(0.8rem, 0.5vw + 0.75rem, 0.85rem);
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.kbd-key {
  display: inline-block;
  padding: 3px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  line-height: 1.4;
  transition: all .15s ease;
}
.shortcuts-table tbody tr:hover .kbd-key {
  border-color: rgba(59,130,246,.3);
  border-bottom-color: rgba(59,130,246,.4);
}

.kbd-plus {
  display: inline-block;
  padding: 0 4px;
  color: var(--text-secondary);
  font-weight: 400;
  font-size: clamp(0.75rem, 0.5vw + 0.7rem, 0.8rem);
}

/* -- Таблица: адаптив -- */
@media (min-width: 768px) {
  .shortcuts-table { font-size: 0.93rem; }
  .shortcuts-table thead th { padding: 13px 18px; }
  .shortcuts-table tbody td { padding: 12px 18px; }
  .kbd { font-size: 0.85rem; }
  .kbd-key { padding: 4px 9px; }
}

@media (min-width: 1024px) {
  .shortcuts-table { font-size: 0.95rem; }
  .shortcuts-table thead th { padding: 14px 20px; }
  .shortcuts-table tbody td { padding: 13px 20px; }
  .shortcut-action-icon { width: 32px; height: 32px; }
  .shortcut-action-icon svg { width: 16px; height: 16px; }
}


/* ================================================================
   18. ПРИНЦИПЫ (КАРТОЧКИ)
   ================================================================ */
.principles-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.principle-card {
  display: flex;
  gap: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 18px 18px 0;
  transition: transform .25s ease, box-shadow .25s ease;
}

.principle-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,.06);
}

.principle-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--accent-light);
  color: var(--accent);
  margin-left: 10px;
}
.principle-icon svg { width: 20px; height: 20px; }

.principle-body h4 {
  font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.1rem); font-weight: 600;
  margin-bottom: 3px; line-height: 1.4;
  color: var(--text);
}
.principle-body p {
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* -- Принципы: адаптив -- */
@media (min-width: 768px) {
  .principles-list { gap: 14px; }
  .principle-card { padding: 20px 20px 20px 0; gap: 18px; }
  .principle-icon { width: 48px; height: 48px; border-radius: 12px; margin-left: 10px; }
  .principle-icon svg { width: 22px; height: 22px; }
  .principle-body h4 { font-size: 1rem; margin-bottom: 4px; }
  .principle-body p { font-size: 0.95rem; }
}

@media (min-width: 1024px) {
  .principles-list { gap: 16px; }
  .principle-card { padding: 22px 22px 22px 0; gap: 20px; }
  .principle-icon { width: 50px; height: 50px; border-radius: 13px; margin-left: 10px; }
  .principle-icon svg { width: 24px; height: 24px; }
  .principle-body h4 { font-size: 1.05rem; margin-bottom: 5px; }
  .principle-body p { font-size: 1rem; line-height: 1.7; }
}


/* ================================================================
   19. КАРТОЧКИ БРАУЗЕРОВ
   ================================================================ */
.browser-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.browser-card {
  display: flex;
  gap: 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 20px 20px 0;
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  line-height: 1.75;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  position: relative;
  overflow: hidden;
}

.browser-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  border-radius: 14px 0 0 14px;
  opacity: 0;
  transition: opacity .25s ease;
}

.browser-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,.07);
  border-color: transparent;
}
.browser-card:hover::before { opacity: 1; }

/* Иконка браузера */
.browser-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  margin-left: 10px;
}

.browser-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 14px;
  opacity: .08;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.8), transparent 70%);
}

.browser-icon svg {
  width: 26px;
  height: 26px;
  position: relative;
  z-index: 1;
}

/* Контент карточки */
.browser-card-body {
  flex: 1;
  min-width: 0;
}

.browser-card-title {
  font-weight: 700;
  color: var(--text);
  font-size: clamp(1rem, 0.5vw + 0.95rem, 1.15rem);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.3;
}

.browser-badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 6px;
  font-size: clamp(0.65rem, 0.5vw + 0.6rem, 0.75rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  line-height: 1.7;
  vertical-align: middle;
}

.browser-card-text {
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  line-height: 1.75;
}

.browser-card-text code {
  background: var(--bg-section);
  color: var(--accent-dark);
  padding: 2px 7px;
  border-radius: 5px;
  font-size: clamp(0.8rem, 0.5vw + 0.75rem, 0.85rem);
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  white-space: nowrap;
}

/* === Цветовые темы браузеров === */
.browser-chrome .browser-icon { background: linear-gradient(135deg, #1A73E8 0%, #4285F4 100%); }
.browser-chrome .browser-icon svg { color: #fff; }
.browser-chrome::before { background: #4285f4; }
.browser-chrome:hover { border-color: #4285f4; }
.browser-chrome .browser-badge { background: #eff6ff; color: #2563eb; }

.browser-firefox .browser-icon { background: linear-gradient(135deg, #FF1B2D 0%, #ffad4a 100%); }
.browser-firefox .browser-icon svg { color: #fff; }
.browser-firefox::before { background: #ff7139; }
.browser-firefox:hover { border-color: #ff7139; }
.browser-firefox .browser-badge { background: #fff7ed; color: #c2410c; }

.browser-edge .browser-icon { background: linear-gradient(135deg, #0078d4 0%, #50b0f0 100%); }
.browser-edge .browser-icon svg { color: #fff; }
.browser-edge::before { background: #0078d4; }
.browser-edge:hover { border-color: #0078d4; }
.browser-edge .browser-badge { background: #f0f9ff; color: #0369a1; }

.browser-safari .browser-icon { background: linear-gradient(135deg, #006cbe 0%, #5ac8fa 100%); }
.browser-safari .browser-icon svg { color: #fff; }
.browser-safari::before { background: #006cbe; }
.browser-safari:hover { border-color: #006cbe; }
.browser-safari .browser-badge { background: #f0f9ff; color: #075985; }

.browser-ie .browser-icon { background: linear-gradient(135deg, #94a3b8 0%, #cbd5e1 100%); }
.browser-ie .browser-icon svg { color: #fff; }
.browser-ie::before { background: #94a3b8; }
.browser-ie:hover { border-color: #94a3b8; }
.browser-ie .browser-badge { background: #f8fafc; color: #64748b; }
.browser-ie { opacity: .75; }
.browser-ie:hover { opacity: 1; }

.browser-opera .browser-icon { background: linear-gradient(135deg, #FF1B2D 0%, #E01525 100%); }
.browser-opera .browser-icon svg { color: #fff; }
.browser-opera::before { background: #FF1B2D; }
.browser-opera:hover { border-color: #E01525; }
.browser-opera .browser-badge { background: #eff6ff; color: #2563eb; }

.browser-yandex .browser-icon { background: linear-gradient(135deg, #FC3F1D 0%, #E03620 100%); }
.browser-yandex .browser-icon svg { color: #fff; }
.browser-yandex::before { background: #FC3F1D; }
.browser-yandex:hover { border-color: #E03620; }
.browser-yandex .browser-badge { background: #eff6ff; color: #2563eb; }

.browser-android .browser-icon { background: linear-gradient(135deg, #34C759 0%, #34A853 100%); }
.browser-android .browser-icon svg { color: #fff; }
.browser-android::before { background: #34C759; }
.browser-android:hover { border-color: #34A853; }

.browser-ios .browser-icon { background: linear-gradient(135deg, #94a3b8 0%, #cbd5e1 100%); }
.browser-ios .browser-icon svg { color: #fff; }
.browser-ios::before { background: #94a3b8; }
.browser-ios:hover { border-color: #94a3b8; }

/* Темная тема для бейджей браузеров */
html[data-theme="dark"] .browser-chrome .browser-badge,
html[data-theme="dark"] .browser-opera .browser-badge,
html[data-theme="dark"] .browser-yandex .browser-badge { background: rgba(59, 130, 246, 0.1); color: var(--accent); }
html[data-theme="dark"] .browser-firefox .browser-badge { background: rgba(255, 113, 57, 0.1); color: #ff7139; }
html[data-theme="dark"] .browser-edge .browser-badge { background: rgba(0, 120, 212, 0.1); color: #50b0f0; }
html[data-theme="dark"] .browser-safari .browser-badge { background: rgba(0, 108, 190, 0.1); color: #5ac8fa; }
html[data-theme="dark"] .browser-ie .browser-badge { background: rgba(148, 163, 184, 0.1); color: #94a3b8; }

/* -- Браузеры: адаптив -- */
@media (min-width: 768px) {
  .browser-list { gap: 16px; }
  .browser-card { padding: 22px 24px 22px 0; gap: 20px; }
  .browser-icon { width: 56px; height: 56px; border-radius: 16px; margin-left: 10px; }
  .browser-icon svg { width: 28px; height: 28px; }
  .browser-card-title { font-size: 1.05rem; margin-bottom: 7px; }
  .browser-card-text { font-size: 0.95rem; }
}

@media (min-width: 1024px) {
  .browser-list { gap: 18px; }
  .browser-card { padding: 24px 28px 24px 0; gap: 22px; }
  .browser-icon { width: 60px; height: 60px; border-radius: 16px; margin-left: 10px; }
  .browser-icon svg { width: 30px; height: 30px; }
  .browser-card-title { font-size: 1.08rem; margin-bottom: 8px; }
  .browser-card-text { font-size: 1rem; line-height: 1.8; }
}


/* ================================================================
   20. FAQ АККОРДЕОН И ПОИСК
   ================================================================ */
.faq-category { margin-bottom: 40px; }
.faq-category h2 {
  font-size: clamp(1.2rem, 1rem + 1vw, 1.5rem); font-weight: 700; margin-bottom: 20px;
  padding-bottom: 10px; border-bottom: 1px solid var(--border-light);
  color: var(--text); line-height: 1.3;
}

.faq-item {
  margin-bottom: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: all .3s ease;
}
.faq-item:hover { box-shadow: 0 5px 15px rgba(0,0,0,.05); }

.faq-question {
  padding: 18px 22px;
  background: var(--bg);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem);
  line-height: 1.5;
  transition: background .3s ease;
  gap: 12px;
}
.faq-question:hover { background: var(--bg-section); }

.faq-toggle {
  width: 20px; height: 20px; flex-shrink: 0;
  color: var(--text-secondary);
  transition: transform .3s ease;
}
.faq-item.active .faq-toggle { transform: rotate(180deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 22px;
  transition: max-height .3s ease, padding .3s ease;
}
.faq-item.active .faq-answer {
    max-height: 800px;
    padding: 20px 22px 24px; 
}

.faq-answer p {
  color: var(--text-secondary); font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem); line-height: 1.8; margin-bottom: 10px;
}
.faq-answer ul {
  list-style: none; padding-left: 0; margin: 0 0 14px;
}
.faq-answer ul li {
  position: relative;
  padding-left: 22px;
  color: var(--text-secondary); font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem); line-height: 1.8;
  margin-bottom: 6px;
}
.faq-answer ul li::before {
  content: '';
  position: absolute; left: 0; top: 8px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); opacity: .5;
}
.faq-answer ol {
  padding-left: 22px; margin: 0 0 14px;
  color: var(--text-secondary); font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem);
  line-height: 1.8; margin-bottom: 10px;
}

.faq-answer a {
  color: var(--accent-dark); font-weight: 500;
  border-bottom: 1px solid rgba(37,99,235,.2);
  transition: all var(--transition);
}
.faq-answer a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.faq-item.hidden { display: none; }

/* -- Поиск FAQ -- */
.faq-search {
  margin-top: 16px; position: relative;
}
.faq-search input {
  width: 100%; padding: 11px 42px 11px 15px;
  border: 1px solid var(--border);
  border-radius: 8px; font-size: 16px; /* 16px предотвращает авто-зум на iOS */
  transition: all .3s;
  background: var(--bg);
  color: var(--text);
}
.faq-search input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,.1);
}
.faq-search input::placeholder {
  color: var(--text-secondary); font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.9rem);
}
.faq-search button {
  position: absolute; right: 5px; top: 50%; transform: translateY(-50%);
  background: none; border: none;
  color: var(--text-secondary); cursor: pointer; padding: 8px;
}
.faq-search button:hover { color: var(--accent); }

/* -- FAQ: адаптив -- */
@media (min-width: 1024px) {
  .faq-category h2 { font-size: 1.35rem; margin-bottom: 24px; padding-bottom: 12px; }
  .faq-question { padding: 20px 24px; font-size: 1rem; }
  .faq-answer p { font-size: 1rem; line-height: 1.85; margin-bottom: 12px; }
  .faq-answer ul li, .faq-answer ol li { font-size: 1rem; }
}


/* ================================================================
   21. КОНТАКТНЫЙ БЛОК
   ================================================================ */
.contact-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 20px;
  transition: box-shadow .3s ease;
}
.contact-card:hover {
  box-shadow: 0 8px 30px rgba(59,130,246,.08);
}

.contact-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.contact-card-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-light);
  border-radius: 12px;
  color: var(--accent);
  flex-shrink: 0;
}
.contact-card-icon svg { width: 22px; height: 22px; }

.contact-card-title {
  font-size: clamp(1rem, 0.5vw + 0.95rem, 1.15rem); font-weight: 700; color: var(--text); line-height: 1.3;
}
.contact-card-subtitle {
  font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.9rem); color: var(--text-secondary); font-weight: 400; margin-top: 2px; line-height: 1.4;
}

.contact-card-body p {
  color: var(--text-secondary); font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1.05rem); line-height: 1.75; margin-bottom: 14px;
}

.contact-email-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  background: var(--accent);
  color: #fff !important;
  font-size: clamp(0.95rem, 0.5vw + 0.9rem, 1rem);
  font-weight: 600;
  border-radius: 10px;
  border-bottom: none !important;
  transition: all .3s ease;
}
.contact-email-link:hover {
  background: var(--accent-dark);
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59,130,246,.3);
}
.contact-email-link:active {
  transform: translateY(0);
  box-shadow: none;
}
.contact-email-link svg { width: 18px; height: 18px; flex-shrink: 0; }

.contact-info-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.contact-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  line-height: 1.6;
}
.contact-info-list li:last-child { border-bottom: none; padding-bottom: 0; }
.contact-info-list li:first-child { padding-top: 0; }
.contact-info-list .info-icon {
  width: 20px; height: 20px; flex-shrink: 0;
  color: var(--accent); margin-top: 2px;
  opacity: .6;
}


/* ================================================================
   22. FOOTER (ПОДВАЛ)
   ================================================================ */
.footer {
  background: var(--bg);
  color: var(--text-secondary);
  padding: 60px 0 40px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.footer-title {
  color: var(--text);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 20px;
  line-height: 1.4;
}

.footer-col > p {
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 0.95rem);
  line-height: 1.7;
  word-break: normal;
  hyphens: none;
}

/* -- Ссылки подвала -- */
.footer-links {
  list-style: none;
}
.footer-links li { margin-bottom: 10px; }

.footer-links a {
  color: var(--text);
  font-size: clamp(0.9rem, 0.5vw + 0.85rem, 1rem);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
  line-height: 1.5;
}
.footer-links a:hover {
  color: var(--accent);
  transform: translateX(4px);
  text-decoration: none;
}

.footer-links a.disabled-link {
  opacity: .4;
  cursor: default;
}
.footer-links a.disabled-link:hover {
  color: var(--text-secondary);
  transform: none;
}

.arrow-icon {
  width: 14px;
  height: 14px;
  opacity: .35;
  transition: opacity var(--transition);
}
.footer-links a:hover .arrow-icon {
  opacity: 1;
  color: var(--accent);
}

/* -- Копирайт -- */
.copyright {
  background: #0a0a0a;
  padding: 20px 1.5rem;
  text-align: center;
  color: #555a6e;
  font-size: clamp(0.85rem, 0.5vw + 0.8rem, 0.95rem);
  border-top: 1px solid rgba(255,255,255,.04);
  line-height: 1.5;
}

/* -- Footer: адаптив -- */
@media (max-width: 992px) {
  .footer-row { grid-template-columns: repeat(2, 1fr); gap: 30px; }
}

@media (max-width: 768px) {
  .footer { padding: 36px 0 24px; }
  .footer-row { gap: 24px; }
  .footer-links a { font-size: 0.95rem; }
}

@media (max-width: 640px) {
  .footer { padding: 32px 0 20px; }
  .footer-row { grid-template-columns: 1fr; gap: 28px; }
  .copyright { font-size: 0.9rem; padding: 16px 1rem; }
}


/* ================================================================
   23. КНОПКА «НАВЕРХ» С ПРОГРЕССОМ
   ================================================================ */
.progress-wrap {
  position: fixed;
  right: 22px;
  bottom: 40px;
  height: 46px;
  width: 46px;
  cursor: pointer;
  display: block;
  border-radius: 50px;
  box-shadow: inset 0 0 0 .1rem rgba(128,130,134,.25);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all 200ms linear;
}
.progress-wrap.active-progress {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Стрелка (обычное состояние) */
.progress-wrap::after {
  position: absolute;
  font-family: 'Unicode';
  font-weight: 900;
  content: '\25B3';
  text-align: center;
  line-height: 46px;
  font-size: 24px;
  color: #3f78e0;
  left: 0;
  top: 0;
  height: 46px;
  width: 46px;
  cursor: pointer;
  display: block;
  z-index: 1;
  transition: all 200ms linear;
}
.progress-wrap:hover::after { opacity: 0; }

/* Стрелка (ховер — градиент) */
.progress-wrap::before {
  position: absolute;
  font-family: 'Unicode';
  font-weight: 900;
  content: '\25B3';
  text-align: center;
  line-height: 46px;
  font-size: 24px;
  opacity: 0;
  background-image: linear-gradient(298deg, #3f78e0, #193059);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  left: 0;
  top: 0;
  height: 46px;
  width: 46px;
  cursor: pointer;
  display: block;
  z-index: 2;
  transition: all 200ms linear;
}
.progress-wrap:hover::before { opacity: 1; }

.progress-wrap svg path { fill: none; }

.progress-wrap svg.progress-circle path {
  stroke: #3f78e0;
  stroke-width: 4;
  box-sizing: border-box;
  transition: all 200ms linear;
}

/* -- Кнопка наверх: адаптив -- */
@media (max-width: 640px) {
  .progress-wrap {
    right: 16px;
    bottom: 24px;
    height: 42px;
    width: 42px;
  }
  .progress-wrap::after,
  .progress-wrap::before {
    line-height: 42px;
    font-size: 20px;
    height: 42px;
    width: 42px;
  }
}

@media (min-width: 576px) {
  .progress-wrap.active-progress { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .progress-wrap,
  .progress-wrap::after {
    transition: none;
  }
}