@media (max-width: 700px) {
  .container {
    max-width: 99vw;
    padding: 12px 2vw 18px 2vw;
    border-radius: 14px;
  }
  input[type="text"] {
    font-size: 0.98rem;
    height: 38px;
    padding: 7px 8px;
    border-radius: 8px;
  }
  h1 {
    font-size: 1.1rem;
  }
  h2 {
    font-size: 0.98rem;
  }
  pre {
    font-size: 0.92rem;
    padding: 8px;
    border-radius: 8px;
    min-height: 38px;
  }
  #visitBtn {
    padding: 10px 18vw;
    font-size: 0.98rem;
    border-radius: 18px;
    bottom: 12px;
  }
}

.container {
  max-width: 820px;
  margin: 48px auto;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 6px 32px rgba(60, 80, 180, 0.10);
  padding: 40px 32px 32px 32px;
}

input[type="text"] {
  width: 100%;
  min-width: 320px;
  max-width: 100%;
  height: 56px;
  font-size: 1.18rem;
  border: 1.5px solid #cbd5e1;
  border-radius: 10px;
  padding: 10px 16px;
  margin-bottom: 22px;
  box-sizing: border-box;
  letter-spacing: 0.04em;
  font-family: 'Fira Mono', 'Consolas', 'Menlo', 'Monaco', 'Courier New', monospace;
  background: #f8fafc;
}
input[type="text"]:focus {
  border-color: #3b82f6;
  outline: none;
  background: #eef2ff;
}