header {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: none;
  margin-bottom: 1rem;
  gap: 0.65rem;
}

/* Стеклянная рамка вокруг логотипа */
.logo-glass {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(255,255,255,0.16), rgba(255,255,255,0.08));
  border-radius: 1rem;
  border: 1.5px solid rgba(180, 180, 180, 0.25);
  box-shadow: 0 10px 28px rgba(36,62,54,0.12), inset 0 0 0 1px rgba(255,255,255,0.25);
  padding: 0.25rem 1rem;
  margin: 0 auto 0.25rem auto;
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
}

/* Логотип строго по центру, без лишних отступов */
.logo-glass a {
  display: flex;
  align-items: center;
  justify-content: center;
}
.main-logo {
  height: 130px;    /* крупнее логотип на ПК */
  width: auto;
  display: block;
  transition: transform 0.3s ease;
}
.main-logo:hover {
  transform: scale(1.05);
}

/* ——— Меню ——— */
.menu-glass {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.07));
  border-radius: 1rem;
  border: 1.5px solid rgba(180, 180, 180, 0.25);
  box-shadow: 0 10px 28px rgba(36,62,54,0.12), inset 0 0 0 1px rgba(255,255,255,0.2);
  width: 100%;
  align-self: stretch;
  padding: 1rem;
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  overflow: visible;
  min-height: fit-content;
}

.menu-glass nav {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  align-items: center;
  align-content: center;
  min-height: fit-content;
  max-width: none;
  overflow: visible;
  word-wrap: break-word;
  text-align: center;
}

/* Стили для кнопок навигации */
.menu-glass .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  color: #ffffff;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  flex: 0 0 auto;
  box-sizing: border-box;
  min-width: max-content;
  height: fit-content;
  word-wrap: normal;
  overflow: visible;
}

.menu-glass .btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.menu-glass .btn.active {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Мобильная адаптация */
@media (max-width: 900px) {
  .main-logo { height: 100px; }
  .logo-glass { padding: 0.28rem 0.7rem; }
  .menu-glass { 
    padding: 0.6rem 1rem; 
    overflow: visible;
    align-items: center !important;
  }
  .menu-glass nav { 
    gap: 0.6rem; 
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
    align-content: center;
    text-align: center;
  }
  .menu-glass .btn { 
    padding: 0.7rem 1.2rem; 
    font-size: 0.85rem; 
    flex: 0 0 auto;
    margin: 0.25rem auto;
  }
}

/* Улучшенная мобильная адаптация */
@media (max-width: 768px) {
  header {
    margin-bottom: 0.5rem;
    gap: 0.5rem;
  }
  
  .main-logo { 
    height: 110px; 
  }
  
  .logo-glass { 
    padding: 0.25rem 0.6rem; 
    border-radius: 0.5rem;
  }
  
  .menu-glass { 
    padding: 0.5rem 0.8rem; 
    border-radius: 0.8rem;
    overflow: visible;
    align-items: center !important;
  }
  
  .menu-glass nav { 
    gap: 0.5rem; 
    justify-content: center !important;
    align-items: center !important;
    flex-wrap: wrap;
    align-content: flex-start;
  }
  
  .menu-glass .btn { 
    padding: 0.6rem 1rem; 
    font-size: 0.8rem; 
    border-radius: 10px;
    flex: 0 0 auto;
    margin: 0.25rem auto;
  }
}

@media (max-width: 480px) {
  header {
    margin-bottom: 0.25rem;
    gap: 0.4rem;
  }
  
  .main-logo { 
    height: 100px; 
  }
  
  .logo-glass { 
    padding: 0.2rem 0.5rem; 
    border-radius: 0.4rem;
  }
  
  .menu-glass { 
    padding: 0.4rem 0.6rem; 
    border-radius: 0.6rem;
    overflow: visible;
    align-items: center !important;
  }
  
  .menu-glass nav { 
    gap: 0.4rem; 
    justify-content: center !important;
    align-items: center !important;
    flex-wrap: wrap;
    align-content: flex-start;
  }
  
  .menu-glass .btn { 
    padding: 0.5rem 0.8rem; 
    font-size: 0.75rem; 
    border-radius: 8px;
    flex: 0 0 auto;
    margin: 0.25rem auto;
  }
}

/* Очень маленькие экраны */
@media (max-width: 360px) {
  .main-logo { 
    height: 70px; 
  }
  
  .logo-glass { 
    padding: 0.15rem 0.4rem; 
  }
  
  .menu-glass { 
    padding: 0.3rem 0.5rem; 
    overflow: visible;
  }
  
  .menu-glass nav { 
    gap: 0.3rem; 
    justify-content: center !important;
    align-items: center !important;
    flex-wrap: wrap;
    align-content: flex-start;
  }
  
  .menu-glass .btn { 
    padding: 0.4rem 0.6rem; 
    font-size: 0.7rem; 
    border-radius: 6px;
    flex: 0 0 auto;
  }
}

/* Экстремально маленькие экраны */
@media (max-width: 320px) {
  .menu-glass { 
    padding: 0.2rem 0.4rem; 
  }
  
  .menu-glass nav { 
    gap: 0.2rem; 
    flex-direction: column;
    align-items: center;
  }
  
  .menu-glass .btn { 
    padding: 0.3rem 0.5rem; 
    font-size: 0.65rem; 
    border-radius: 5px;
    width: 100%;
    max-width: 200px;
  }
}

/* Принудительный перенос на очень узких экранах */
@media (max-width: 600px) {
  .menu-glass nav {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
  }
  
  .menu-glass .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
    flex: 0 0 auto;
  }
}

@media (max-width: 500px) {
  .menu-glass nav {
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
  }
  
  .menu-glass .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
    flex: 0 0 auto;
  }
}

/* Принудительный перенос на всех экранах */
@media (max-width: 1200px) {
  .menu-glass nav {
    flex-wrap: wrap;
    justify-content: center;
    align-content: flex-start;
  }
  
  .menu-glass .btn {
    flex: 0 0 auto;
    margin-bottom: 0.5rem;
  }
}

@media (max-width: 1000px) {
  .menu-glass nav {
    flex-wrap: wrap;
    justify-content: center;
    align-content: flex-start;
  }
  
  .menu-glass .btn {
    flex: 0 0 auto;
    margin-bottom: 0.5rem;
  }
}

/* Улучшения для touch-устройств */
@media (hover: none) and (pointer: coarse) {
  .menu-glass .btn:hover {
    transform: none;
  }
  
  .menu-glass .btn:active {
    transform: scale(0.98);
  }
}

/* Ландшафтная ориентация на мобильных */
@media (max-width: 768px) and (orientation: landscape) {
  .menu-glass {
    padding: 0.3rem 0.6rem;
  }
  
  .menu-glass nav {
    gap: 0.4rem;
  }
  
  .menu-glass .btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
  }
}