:root {
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --radius: 0.5rem;
  --transition: all 0.3s ease;
  --container: 600px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  html { font-size: 16px; }

  body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(to right, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    font-family: var(--font);
    color: var(--text-body);
    -webkit-font-smoothing: antialiased;
  }

  .container {
    max-width: var(--container);
    width: 100%;
    margin: 0 auto;
    padding: var(--space-md) var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    opacity: 0;
    animation: fadeIn 0.6s ease-out forwards;
  }

  @keyframes fadeIn {
    to { opacity: 1; }
  }

  .card {
    background: var(--card);
    border: 2px solid var(--alpha-20);
    border-radius: var(--radius);
    padding: var(--space-md);
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .card:hover {
    border-color: var(--alpha-40);
    transform: translateY(-0.02rem);
    box-shadow: var(--shadow-lg);
  }

  header.card {
    background: transparent;
    border: none;
    box-shadow: none;
  }

  header.card:hover {
    transform: none;
    box-shadow: none;
  }

  .logo {
    height: 4rem;
    background: url("../images/logo.png") no-repeat left center;
    background-size: contain;
  }

  .search {
    display: flex;
    height: 3rem;
    background: var(--surface);
    border: 2px solid var(--alpha-30);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
  }

  .search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.03rem var(--primary-light);
  }

  .search__input {
    flex: 1;
    padding: 0 var(--space-md);
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 1.1rem;
    outline: none;
  }

  .search__input::placeholder {
    color: var(--text-dim);
  }

  .btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--text);
    border: none;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
  }

  .btn:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: scale(1.02);
  }

  .btn:active {
    transform: scale(0.98);
  }

  .btn--search {
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
  }

  .btn__icon {
    width: 1.2rem;
    height: 1.2rem;
    filter: invert(0);
  }

  .title {
    color: var(--text);
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    white-space: nowrap;
  }

  .title__icon {
    width: 2rem;
    height: 2rem;
    animation: spin 3s linear infinite;
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  .subtitle {
    color: var(--text-dim);
    font-size: 1.1rem;
    text-align: center;
    margin-top: var(--space-xs);
  }

  .pwa-install {
    display: flex;
    justify-content: center;
    margin-top: var(--space-md);
  }

  .btn--install {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--text-primary);
    border: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
  }

  .btn--install:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-0.02rem);
    box-shadow: var(--shadow-medium);
    border-color: var(--border-medium);
  }

  .btn--install:active {
    transform: scale(0.98);
  }

  .install-icon {
    font-size: 1.2rem;
  }

  .install-text {
    font-weight: 600;
  }

  .heading {
    color: var(--text);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
  }

  .text {
    color: var(--text-dim);
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: var(--space-sm);
  }

  .text:last-child {
    margin-bottom: 0;
  }

  .text--highlight {
    color: var(--primary-light);
    font-weight: 600;
    font-size: 1.1rem;
  }

  .link {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
  }

  .link:hover {
    color: var(--text);
    text-decoration: underline;
  }

  .list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .list__title {
    color: var(--text);
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-md);
  }

  #domain-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--alpha-5);
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }

  .item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--alpha-10), transparent);
    transition: left 0.5s ease;
  }

  .item:hover {
    background: var(--alpha-10);
    transform: translateY(-0.02rem);
  }

  .item:hover::before {
    left: 100%;
  }

  .item__number {
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
  }

  .item__text {
    flex: 1;
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .item__action {
    flex-shrink: 0;
  }

  .steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin: var(--space-sm) 0;
  }

  .step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .step__number {
    width: 1.5rem;
    height: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 0.2rem;
  }

  .step__content {
    flex: 1;
    color: var(--text-dim);
    font-size: 1rem;
    line-height: 1.5;
  }

  .float {
    position: fixed;
    right: var(--space-lg);
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    animation: pulse 2s ease-in-out infinite;
  }

  .float-link {
    position: fixed;
    right: var(--space-lg);
    bottom: 8.5rem;
    width: 4rem;
    height: 4rem;
    z-index: 10;
    display: block;
  }

  .float-link .float--telegram {
    position: static;
  }

  @keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
  }

  .float:hover {
    transform: scale(1.1);
  }

  .float--service {
    bottom: 4rem;
    filter: drop-shadow(var(--shadow));
  }

  .float--telegram {
    bottom: 8.5rem;
    filter: drop-shadow(var(--shadow));
  }



  .modal {
    position: fixed;
    inset: 0;
    background: var(--overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    animation: fadeIn 0.3s ease-out;
  }

  .modal__content {
    background: linear-gradient(135deg, var(--modal-bg-start), var(--modal-bg-end));
    border: 2px solid var(--alpha-20);
    border-radius: var(--radius);
    padding: var(--space-lg);
    max-width: 28rem;
    width: 90%;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease-out;
  }

  @keyframes slideUp {
    from {
      opacity: 0;
      transform: translateY(0.3rem) scale(0.9);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }

  .modal__close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 1.5rem;
    height: 1.5rem;
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition);
    outline: none;
    border: none;
    background: none;
  }

  .modal__close:hover {
    opacity: 1;
    transform: scale(1.1);
  }

  .modal__close:focus {
    outline: none;
    opacity: 1;
  }

  .modal__logo {
    width: 6rem;
    height: auto;
    display: block;
    margin: 0 auto var(--space-md);
  }

  .modal__text {
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
  }

  .modal__text:first-of-type {
    font-size: 1.3rem;
  }

  .modal__text:last-of-type {
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: 0;
  }

  .modal__url {
    background: var(--alpha-10);
    color: var(--text);
    padding: var(--space-sm);
    border-radius: var(--space-sm);
    font-size: 1rem;
    text-align: center;
    margin: var(--space-sm) 0;
    word-break: break-word;
    min-height: 2.5rem;
    border: 1px solid var(--alpha-20);
    transition: var(--transition);
    line-height: 1.4;
  }

  .modal__url--clickable {
    cursor: pointer;
    position: relative;
  }

  .modal__url--clickable::after {
    content: '👆 Click to visit';
    position: absolute;
    bottom: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    color: var(--text-dim);
    white-space: nowrap;
  }

  .modal__url--clickable:hover {
    background: var(--alpha-20);
    border-color: var(--alpha-40);
  }

  .modal__url--clickable:hover::after {
    color: var(--text);
  }

  .success {
    border-color: var(--success);
  }

  .success .modal__text {
    color: var(--success-text);
  }

  .success .modal__url {
    background: var(--success-bg);
    border-color: var(--success-border);
  }

  .error {
    border-color: var(--error);
  }

  .error .modal__text {
    color: var(--error-text);
  }

  .error .modal__url {
    background: var(--error-bg);
    border-color: var(--error-border);
  }

  .error-message {
    background: linear-gradient(135deg, var(--error), var(--error-gradient-end));
    color: var(--text);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
    margin-bottom: var(--space-sm);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    box-shadow: var(--shadow);
    animation: slideDown 0.3s ease-out;
  }

  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-0.2rem);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @media (max-width: 480px) {
    html { font-size: 14px; }

    .container {
      padding: var(--space-sm);
    }

    .title {
      font-size: 1.3rem;
    }

    .float {
      width: 3.5rem;
      height: 3.5rem;
    }

    .float--service {
      bottom: 3rem;
    }

    .float--telegram {
      bottom: 0;
    }

    .float-link {
      bottom: 7rem;
    }
  }

  *:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  .btn:focus,
  .item:focus {
    outline-color: var(--primary-light);
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }

  .hidden { display: none; }
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
  }