html {
  height: 100%;
}

body {
  font-family: Arial, sans-serif;
  background-color: #e5e7eb;
  margin: 0;
  padding: 0;
  font-size: 18px;
}

.container {
  width: 100%;
  max-width: 480px;
  margin: 24px auto 8px;
  background: #f5f5f5;
  padding: 20px 16px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  box-sizing: border-box;
}

textarea {
  width: 100%;
  height: 140px;
  padding: 10px;
  font-size: 18px;
  border: 1px solid #ccc;
  border-radius: 4px;
  resize: vertical;
  box-sizing: border-box;
}

button {
  background-color: #162d5b;
  color: white;
  border: none;
  padding: 14px;
  font-size: 18px;
  cursor: pointer;
  border-radius: 4px;
  width: 100%;
  max-width: 100%;
  display: block;
  margin-top: 12px;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #1e3d7c;
}

.container p {
  font-size: 16px;
  line-height: 1.5;
}

.answer {
  background: #f0f0f0;
  padding: 15px;
  border-radius: 6px;
  margin-top: 20px;
}

footer {
  text-align: center;
  font-size: 13px;
  color: #666;
  padding: 8px 16px 16px;
  margin-top: 16px;
}

footer a {
  color: #666;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* десктоп и планшет */
@media (min-width: 768px) {
  .container {
    max-width: 600px;
    margin: 40px auto;
    padding: 20px 30px;
  }

  footer {
    font-size: 14px;
  }
}

/* мобильные экраны - режим крупного шрифта */
@media (max-width: 480px) {
  body {
    font-size: 26px;
  }

  .container {
    max-width: 430px;
    margin: 16px auto 8px;
    padding: 18px 14px;
  }

  textarea {
    font-size: 24px;
    height: 150px;
  }

  button {
    font-size: 24px;
    padding: 16px;
  }

  .container p {
    font-size: 22px;
  }

  footer {
    font-size: 18px;
  }
}