@media (max-width: 768px) {
  .terminal-header {
    cursor: default;
    user-select: none;
    background: var(--surface-1);
  }
  
  .terminal-header:active {
    cursor: default;
  }
  
  .nav {
    flex-direction: column;
    gap: 0.8rem;
    padding: 0.8rem;
  }
  
  .logo {
    font-size: 1.2rem;
    text-align: center;
  }
  
  .nav-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    margin: 0;
  }
  
  .nav-button {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    flex-direction: column;
    font-size: 0.85rem;
    box-shadow: var(--elevation-1);
    transition: all 0.2s ease;
  }
  
  .nav-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
  }
  
  .nav-button i {
    font-size: 1.4rem;
    margin-bottom: 0.25rem;
  }
  
  .nav-button .text-ru,
  .nav-button .text-en {
    display: none !important;
  }
  
  .controls-wrapper {
    gap: 0.75rem;
    padding: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .theme-dropdown {
    margin-right: 0;
  }
  
  .theme-toggle {
    padding: 0.75rem;
    border-radius: 12px;
  }
  
  .theme-toggle .theme-name,
  .theme-toggle .fa-chevron-down {
    display: none;
  }
  
  .lang-btn {
    padding: 0.75rem;
    border-radius: 12px;
  }
  
  .lang-btn .lang-name {
    display: none;
  }
  
  .grid-card {
    margin: 0.75rem;
    padding: 1.2rem;
    border-radius: var(--radius-1);
  }
  
  .qr-page-container {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  
  .qr-input {
    min-height: 160px;
    font-size: 1rem;
    padding: 1rem;
    border-radius: var(--radius-1);
  }
  
  #qr-code-container {
    min-height: 220px;
    border-radius: var(--radius-1);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .placeholder-text {
    font-size: 1rem;
  }
  
  #download-qr-btn {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border-radius: var(--radius-1);
  }
  
  .info-icon-wrapper {
    position: relative;
    display: inline-block;
  }
  
  .tooltip {
    width: 220px;
    left: -110px;
    font-size: 0.9rem;
    padding: 0.75rem;
  }
}

@media (max-width: 480px) {
  .nav-button {
    width: 55px;
    height: 55px;
    border-radius: 14px;
  }
  
  .nav-button i {
    font-size: 1.3rem;
  }
  
  .controls-wrapper {
    gap: 0.5rem;
    padding: 0.5rem;
  }
  
  .grid-card {
    margin: 0.5rem;
    padding: 1rem;
  }
  
  .qr-input {
    min-height: 140px;
    font-size: 0.9rem;
    padding: 0.8rem;
  }
  
  #qr-code-container {
    min-height: 180px;
  }
  
  .placeholder-text {
    font-size: 0.9rem;
  }
  
  .card-header h2 {
    font-size: 1.25rem;
  }
  
  #download-qr-btn {
    padding: 0.7rem 1.2rem;
    font-size: 0.95rem;
  }
  
  .tooltip {
    width: 200px;
    left: -100px;
    font-size: 0.85rem;
    padding: 0.6rem;
  }
}