html, body {
      height: 100%;
      overflow-x: hidden;
      box-sizing: border-box;
    }

    *, *::before, *::after {
      box-sizing: inherit;
    }

    body {
      margin: 0;
      font-family: Inter, sans-serif;
      background: linear-gradient(135deg, #fff176, #ffeb3b);
      color: #1f1f1f;

      display: flex;
      flex-direction: column;
    }

    header {
      padding: 30px 60px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-weight: 800;
      font-size: 20px;
    }

    nav {
      font-size: 14px;
      opacity: 0.8;
    }

    main {
      padding: 80px 60px;
      flex: 1;
    }

    h1 {
      font-size: 54px;
      margin: 0 0 20px 0;
      line-height: 1.1;
    }

    p {
      max-width: 600px;
      font-size: 18px;
      opacity: 0.75;
      line-height: 1.6;
    }

.block {
  margin-top: 80px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.item {
  padding: 16px;
  background: rgba(255,255,255,0.25);
  border-radius: 14px;
  backdrop-filter: blur(6px);
  font-size: 14px;
  text-align: center;
}

.item:last-child {
  display: flex;
  align-items: center;
  justify-content: center;
}
    footer {
        padding: 40px 60px;
        font-size: 12px;
        opacity: 0.6;
        margin-top: auto;
    }

    @media (max-width: 900px) {
      header, main, footer {
        padding: 20px;
      }

      .block {
        grid-template-columns: 1fr;
      }

      h1 {
        font-size: 38px;
      }
    }
.my-button {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 20px;
  background: rgba(31, 31, 31, 0.9);
  color: #fff;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  transition: 0.2s ease;
}

.my-button:hover {
  transform: translateY(-2px);
  background: #000;

}