/* ══════════════════════════════════════════════════════════════
   НАВИГАЦИЯ
   ══════════════════════════════════════════════════════════════ */

nav {
  position: fixed; 
  top: 0; 
  left: 0; 
  right: 0; 
  z-index: 100;
  padding: 8px 0;
  background: var(--nav-bg, rgba(7,11,20,0.2));
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all .3s;
}

.nav-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
}

.logo { 
  display: flex; 
  align-items: center; 
  gap: 10px; 
  text-decoration: none; 
}

.logo-text { 
  font-size: 16px; 
  font-weight: 700; 
  color: var(--white); 
  line-height: 1; 
}

.logo-text span { 
  display: block; 
  font-size: 11px; 
  font-weight: 400; 
  color: var(--muted); 
  margin-top: 4px; 
}

.nav-links { 
  display: flex; 
  gap: 32px; 
  list-style: none; 
}

.nav-links a { 
  color: var(--muted); 
  font-size: 14px; 
  font-weight: 500; 
  text-decoration: none; 
  transition: color .2s; 
}

.nav-links a:hover { 
  color: var(--white); 
}

.nav-cta { 
  display: flex; 
  gap: 16px; 
  align-items: center; 
}

.hamburger { 
  display: none; 
}

/* ── LANG SWITCHER ── */
.lang-switcher {
  position: relative;
  display: flex;
  align-items: center;
}

.lang-switcher-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--white);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
}

.lang-switcher-btn:hover {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
}

.lang-flag {
  font-size: 16px;
  line-height: 1;
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all .2s;
  z-index: 200;
  backdrop-filter: blur(20px);
}

.lang-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
  text-align: left;
}

.lang-option:hover {
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--white);
}

.lang-option.active {
  background: rgba(var(--accent-rgb), 0.15);
  color: var(--accent);
}

.lang-option .lang-flag { font-size: 18px; }
.lang-option .lang-name { flex: 1; }
.lang-option .lang-short {
  font-size: 11px;
  font-weight: 700;
  opacity: 0.5;
  letter-spacing: 0.5px;
}

/* ── THEME TOGGLE ── */
.theme-toggle {
  width: 34px; 
  height: 34px; 
  border-radius: 50%;
  background: var(--surface2); 
  border: 1px solid var(--border);
  cursor: pointer; 
  display: flex; 
  align-items: center; 
  justify-content: center;
  transition: all .3s; 
  flex-shrink: 0; 
  padding: 0;
}

.theme-toggle:hover { 
  border-color: var(--accent); 
  background: rgba(var(--accent-rgb), 0.1); 
}

.theme-toggle svg { 
  width: 16px; 
  height: 16px; 
  stroke: var(--muted); 
  fill: none; 
  stroke-width: 2; 
  stroke-linecap: round; 
  stroke-linejoin: round; 
  transition: stroke .3s; 
}

.theme-toggle:hover svg { 
  stroke: var(--accent); 
}

.icon-sun  { display: none; }
.icon-moon { display: block; }
html.light .icon-sun  { display: block; }
html.light .icon-moon { display: none; }

/* ══════════════════════════════════════════════════════════════
   АДАПТИВНОСТЬ НАВИГАЦИИ
   ══════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-demo-item { display: none; }
  
  .lang-switcher { margin: 0; }
  .lang-switcher-btn { padding: 5px 8px; font-size: 12px; }
  .lang-flag { font-size: 14px; }
  .lang-dropdown { right: -40px; }
  
  .nav-links.open {
    display: flex; 
    flex-direction: column;
    position: absolute; 
    top: 100%; 
    left: 0; 
    right: 0;
    min-height: calc(100vh - 64px);
    background: var(--menu-bg, rgba(7,11,20,0.98));
    backdrop-filter: blur(24px);
    padding: 36px 28px 48px;
    gap: 0; 
    z-index: 999; 
    overflow-y: auto;
    counter-reset: nav-counter;
  }
  
  .nav-links.open li { 
    counter-increment: nav-counter; 
  }
  
  .nav-links.open li a {
    display: flex; 
    align-items: center; 
    gap: 18px;
    font-size: 20px; 
    font-weight: 600; 
    letter-spacing: -0.3px;
    padding: 16px 0;
    border-bottom: 1px solid var(--menu-divider, rgba(255,255,255,0.06));
    color: var(--menu-link, rgba(255,255,255,0.85));
    text-decoration: none;
    transition: color .2s, transform .2s;
  }
  
  .nav-links.open li a::before {
    content: counter(nav-counter, decimal-leading-zero);
    font-size: 11px; 
    font-weight: 700; 
    letter-spacing: 1px;
    color: var(--accent3); 
    min-width: 24px; 
    flex-shrink: 0;
  }
  
  .nav-links.open li a:hover { 
    color: var(--white); 
    transform: translateX(5px); 
  }
  
  .nav-demo-item { 
    display: block !important; 
    margin-top: 32px; 
  }
  
  .nav-links.open .nav-demo-item a {
    display: block; 
    text-align: center;
    background: linear-gradient(135deg, var(--accent), var(--accent3));
    color: var(--white) !important; 
    font-size: 15px !important;
    font-weight: 700 !important; 
    padding: 15px 24px !important;
    border-radius: 12px; 
    border-bottom: none !important;
    transform: none !important; 
    letter-spacing: 0.3px;
  }
  
  .nav-links.open .nav-demo-item a::before { 
    display: none !important; 
  }
  
  .hamburger { 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    gap: 5px; 
    width: 36px; 
    height: 36px; 
    cursor: pointer; 
    background: none; 
    border: none; 
    padding: 4px; 
  }
  
  .hamburger span { 
    display: block; 
    width: 22px; 
    height: 2px; 
    background: var(--white); 
    border-radius: 2px; 
    transition: all .3s; 
    transform-origin: center; 
  }
  
  .hamburger.open span:nth-child(1) { 
    transform: rotate(45deg) translate(5px,5px); 
  }
  
  .hamburger.open span:nth-child(2) { 
    opacity: 0; 
  }
  
  .hamburger.open span:nth-child(3) { 
    transform: rotate(-45deg) translate(5px,-5px); 
  }
}